The presented research focused on the metallization of polyester, cotton, and polyamide 6.6 fabri... more The presented research focused on the metallization of polyester, cotton, and polyamide 6.6 fabrics using the silver conductive complex to allow electric conductivity through the fabric’s surface and enhance the fabric’s mechanical properties. The method used for the metallization of studied fabrics does not require the use of expensive toxic chemicals or electricity, making the process more economically acceptable. The signal attenuation was measured in frequency ranges of 1–4 and 5–12 GHz. After five cycles of metallization, the polyester fabric has higher EMI effectiveness, in a lower range was 45.44 and 57.25 dB. X-ray powder diffractometry (XRD) and infrared spectroscopy with Fourier transform infrared spectrophotometry (FT-IR) characterize the modified tissues. Scanning electron microscopy coupled with energy-dispersion spectroscopy (SEM-EDS) was used to determine layers’ morphology and elemental composition. Also, the water and air permeability of modified textiles was determined.
Adsorption of carbamate pesticide Methomyl by Co-Beta Zeolite particles prepared by wet ion-excha... more Adsorption of carbamate pesticide Methomyl by Co-Beta Zeolite particles prepared by wet ion-exchange method from aqueous solutions was studied. The effect of zeolite and pesticide concentrations, pH value, and sintering temperature on pesticide removal from an aqueous solution was studied. The change of methomyl concentration during the adsorption was followed using the UV-Visible spectrophotometer. Scanning Electron Microscopy-Energy Dispersive X-ray Spectroscopy (SEM-EDS) revealed the modified zeolite morphology and elemental structure. The change of the adsorbent surface before and after dye removal was observed using the Fourier Transformation-infrared spectroscopy (FT-IR). The adsorption kinetics follows the pseudo-second-order kinetics model, and at optimal condition adsorption rate is k1 = 0.0166 g mg-1 min-1. The Langmuir, Freundlich, Temkin and Dubinin-Radushkovich adsorption isotherm models were used to describe the adsorption process. Thermodynamic parameters were also de...
Electromagnetic interference (EMI) has become a widespread modern environmental pollutant. There ... more Electromagnetic interference (EMI) has become a widespread modern environmental pollutant. There is an essential need for practical and applicable materials for its attenuation. Therefore, the presented research has focused on metallization of carbon fabric using the silver conductive complex solution to enhance the surface conductivity and mechanical properties of the fabric. With this amplification and improving the mentioned characteristics, lightweight and flexible modified carbon fibers can be applied in many environments. The modification has been performed in three steps: the silver conductive complex synthesis, carbon fabric immersion into a silver complex solution, treating with temperature for silver deposition by annealing. The method used for the metallization of carbon fabrics surface does not require expensive and toxic chemicals or electricity, making the process more ecologically and economically acceptable. One of the advantages of using the method for surface modification is the possibility of usage for other materials, not only for textiles and foils. The examination of the surface structure, electrical, EMI shielding characteristics, and mechanical properties of carbon fabrics modified by silver deposition contributes to the determination of multifunctional properties of materials. Also, the dependence on the improvement of multispectral electromagnetic interference shielding effectiveness (EMI SE) characteristics and mechanical properties of materials on the number of cycles has been determined.
The presented research focused on the metallization of polyester, cotton, and polyamide 6.6 fabri... more The presented research focused on the metallization of polyester, cotton, and polyamide 6.6 fabrics using the silver conductive complex to allow electric conductivity through the fabric’s surface and enhance the fabric’s mechanical properties. The method used for the metallization of studied fabrics does not require the use of expensive toxic chemicals or electricity, making the process more economically acceptable. The signal attenuation was measured in frequency ranges of 1–4 and 5–12 GHz. After five cycles of metallization, the polyester fabric has higher EMI effectiveness, in a lower range was 45.44 and 57.25 dB. X-ray powder diffractometry (XRD) and infrared spectroscopy with Fourier transform infrared spectrophotometry (FT-IR) characterize the modified tissues. Scanning electron microscopy coupled with energy-dispersion spectroscopy (SEM-EDS) was used to determine layers’ morphology and elemental composition. Also, the water and air permeability of modified textiles was determined.
In recent decades, the expansion of arms development has initiated the need to increase the prote... more In recent decades, the expansion of arms development has initiated the need to increase the protection of people and vehicles from pistol and rifle ammunition. Modern ceramic and ceramic-based materials are lightweight and durable and provide a sufficient level of protection against the penetration and impact of ammunition, which can protect the vital organs of the person. Modern tendencies require the addition of armor to vehicles, which reduces the necessity of excessive bulk steel usage and eliminates large and heavy mass weight amounts. By replacing the armored steel with new ballistic materials, a higher level of ballistic protection could be achieved, as well as reduction of weight, which both allows better mobility and increases the ability of installment of additional battle fighting equipment. Modern ceramic materials used in the production of armor are made by sintering the ceramic powder under certain conditions in a suitable molding tool. The chapter will cover the short material requirements, and material responses to ballistic impact, production methods, and applications. Also, the chapter will include the usage of ceramic fibers, alumina, silicon and boron carbide, titanium diboride, and ballistic materials that consist of a ceramic face bonded to a reinforced plastic laminate or metallic backplate.
Adsorption of carbamate pesticide Methomyl by Co-Beta Zeolite particles prepared by wet ion-excha... more Adsorption of carbamate pesticide Methomyl by Co-Beta Zeolite particles prepared by wet ion-exchange method from aqueous solutions was studied. The effect of zeolite and pesticide concentrations, pH value, and sintering temperature on pesticide removal from an aqueous solution was studied. The change of methomyl concentration during the adsorption was followed using the UV-Visible spectrophotometer. Scanning Electron Microscopy-Energy Dispersive X-ray Spectroscopy (SEM-EDS) revealed the modified zeolite morphology and elemental structure. The change of the adsorbent surface before and after dye removal was observed using the Fourier Transformation-infrared spectroscopy (FT-IR). The adsorption kinetics follows the pseudo-second-order kinetics model, and at optimal condition adsorption rate is k1 = 0.0166 g mg-1 min-1. The Langmuir, Freundlich, Temkin and Dubinin-Radushkovich adsorption isotherm models were used to describe the adsorption process. Thermodynamic parameters were also de...
The influence of samarium, as an additional alloying element, on the morphology and corrosion per... more The influence of samarium, as an additional alloying element, on the morphology and corrosion performance of the Zn-Co-Sm alloy electrodeposited coatings, was investigated by scanning electron microscopy coupled with energy dispersive X-ray spectroscopy (SEM/EDS) and electrochemical impedance spectroscopy (EIS) measurements. The Zn-Co-Sm coatings were electrodeposited from the aqueous solution containing Sm(NO3)3, ZnCl2, and CoCl2 as the metal ion source. The percentage of Sm in the coating may be very finely tuned by setting electrodeposition parameters, including cathodic current density, glycine concentration in the electroplating solution, and the solution temperature. The coatings with Sm content from 0.5 to 18.5 wt.% were produced. Since low deposition current densities (10–50 mA cm−2) were applied, the samples obtained were of good adhesion and compact. The presence of Sm2O3 inclusion was verified by XRD as the Sm2O3 crystalline phase. Samarium is incorporated in the coatings...
AbstractSorption of the Zn2+ and Ni2+ ions by the Na+-enriched natural clinoptilolite (Na-CLI) fr... more AbstractSorption of the Zn2+ and Ni2+ ions by the Na+-enriched natural clinoptilolite (Na-CLI) from aqueous solutions containing both Zn2+ and Ni2+ ions at a range of concentrations has been studied at 298, 308, and 318 K. It was found that the sorption of a particular ion by Na-CLI increases with the increase in the initial concentration of the solution of that ion. At a given initial concentration, the sorption degree increases with temperature. Also, the sorption of a particular ion is greater when the initial solution contains a second ion than it is when the particular ion is present alone. The sorption kinetics is in accord with the pseudo-second-order reaction rate model. The values of the k2 rate constant do not show a regular change with the initial Zn2+/Ni2+ concentrations probably because the presence of the second ion has a significant effect on the reaction rate. Thermodynamic study has shown that the sorption is exothermic, occurring spontaneously in the 298–318 K range and with a positive e...
Silver coated textiles as multifunctional flexible materials, 2023
Among numerous active electrode materials, nowadays applied in capacitor devices, silver nanostru... more Among numerous active electrode materials, nowadays applied in capacitor devices, silver nanostructures represent promising electrodes for electrochemical capacitors, owing to their acceptable cost, large surface area and high electrical conductivity. In this work we investigate the electrochemical capacitance and electromagnetic interference shielding effect of two textile materials: polyester and cotton fabrics, coated with silver particles. The multifunctional materials were prepared in a manner that the fabrics were immersed into a silver complex solution and subsequently dried in the air and heated to induce silver deposition by annealing. This synthesis method does not apply electricity or any specific chemicals, and so the process is more economically acceptable for production of lightweight and flexible conductive materials. Characterization of the modified textiles and deposited silver particles were performed by scanning electron microscopy coupled with energy-dispersive spectroscopy (SEM-EDS), as well as with X-ray diffractometry (XRD). The capacitance and the amount of the electric charge stored were measured in the two electrolytes (KCl and NaOH), and for electrodes prepared by one, three, or five cycles of fabrics immersion in the silver solution. The capacitance was measured by cyclic voltammetry, while the capacity for electric charge storage was calculated from the recorded charge-discharge curves at the textile working electrodes. The signal attenuation was measured in the frequency range of 300-1000 MHz. After five cycles of metallization, the electromagnetic interference shielding (EMI SE) of silver coated cotton fabric in a lower examined range was 23.26 dB.
The presented research focused on the metallization of polyester, cotton, and polyamide 6.6 fabri... more The presented research focused on the metallization of polyester, cotton, and polyamide 6.6 fabrics using the silver conductive complex to allow electric conductivity through the fabric’s surface and enhance the fabric’s mechanical properties. The method used for the metallization of studied fabrics does not require the use of expensive toxic chemicals or electricity, making the process more economically acceptable. The signal attenuation was measured in frequency ranges of 1–4 and 5–12 GHz. After five cycles of metallization, the polyester fabric has higher EMI effectiveness, in a lower range was 45.44 and 57.25 dB. X-ray powder diffractometry (XRD) and infrared spectroscopy with Fourier transform infrared spectrophotometry (FT-IR) characterize the modified tissues. Scanning electron microscopy coupled with energy-dispersion spectroscopy (SEM-EDS) was used to determine layers’ morphology and elemental composition. Also, the water and air permeability of modified textiles was determined.
The study's primary goal is to determine carbamate pesticide methomyl's kinetic parameters and de... more The study's primary goal is to determine carbamate pesticide methomyl's kinetic parameters and degradation efficiency from water solution by direct electrochemical oxidation using IrOX anode. Also, define the dependence of the efficiency of methomyl decomposition by direct electrochemical oxidation on the initial concentration of pesticide and electrolyte, applied current, and pH value. The results of methomyl degradation by direct electrochemical oxidation obey the pseudo-first kinetic order. Ultraviolet-visible (UV-Vis) spectroscopy followed the methomyl concentration during the study. The degradation products were studied using the Fourier transform infrared (FT-IR) spectroscopy. Also, this study determines the energy consumption and optimal initial conditions. The phytotoxicity of pesticide and degradation products was studied using mung beans.
Electromagnetic interference (EMI) has become a widespread modern environmental pollutant. There ... more Electromagnetic interference (EMI) has become a widespread modern environmental pollutant. There is an essential need for practical and applicable materials for its attenuation. Therefore, the presented research has focused on metallization of carbon fabric using the silver conductive complex solution to enhance the surface conductivity and mechanical properties of the fabric. With this amplification and improving the mentioned characteristics, lightweight and flexible modified carbon fibers can be applied in many environments. The modification has been performed in three steps: the silver conductive complex synthesis, carbon fabric immersion into a silver complex solution, treating with temperature for silver deposition by annealing. The method used for the metallization of carbon fabrics surface does not require expensive and toxic chemicals or electricity, making the process more ecologically and economically acceptable. One of the advantages of using the method for surface modification is the possibility of usage for other materials, not only for textiles and foils. The examination of the surface structure, electrical, EMI shielding characteristics, and mechanical properties of carbon fabrics modified by silver deposition contributes to the determination of multifunctional properties of materials. Also, the dependence on the improvement of multispectral electromagnetic interference shielding effectiveness (EMI SE) characteristics and mechanical properties of materials on the number of cycles has been determined.
The presented research focused on the metallization of polyester, cotton, and polyamide 6.6 fabri... more The presented research focused on the metallization of polyester, cotton, and polyamide 6.6 fabrics using the silver conductive complex to allow electric conductivity through the fabric’s surface and enhance the fabric’s mechanical properties. The method used for the metallization of studied fabrics does not require the use of expensive toxic chemicals or electricity, making the process more economically acceptable. The signal attenuation was measured in frequency ranges of 1–4 and 5–12 GHz. After five cycles of metallization, the polyester fabric has higher EMI effectiveness, in a lower range was 45.44 and 57.25 dB. X-ray powder diffractometry (XRD) and infrared spectroscopy with Fourier transform infrared spectrophotometry (FT-IR) characterize the modified tissues. Scanning electron microscopy coupled with energy-dispersion spectroscopy (SEM-EDS) was used to determine layers’ morphology and elemental composition. Also, the water and air permeability of modified textiles was determined.
Electromagnetic interference (EMI) has become a widespread modern environmental pollutant. There ... more Electromagnetic interference (EMI) has become a widespread modern environmental pollutant. There is an essential need for practical and applicable materials for its attenuation. Therefore, the presented research has focused on metallization of carbon fabric using the silver conductive complex solution to enhance the surface conductivity and mechanical properties of the fabric. With this amplification and improving the mentioned characteristics, lightweight and flexible modified carbon fibers can be applied in many environments. The modification has been performed in three steps: the silver conductive complex synthesis, carbon fabric immersion into a silver complex solution, treating with temperature for silver deposition by annealing. The method used for the metallization of carbon fabrics surface does not require expensive and toxic chemicals or electricity, making the process more ecologically and economically acceptable. One of the advantages of using the method for surface modification is the possibility of usage for other materials, not only for textiles and foils. The examination of the surface structure, electrical, EMI shielding characteristics, and mechanical properties of carbon fabrics modified by silver deposition contributes to the determination of multifunctional properties of materials. Also, the dependence on the improvement of multispectral electromagnetic interference shielding effectiveness (EMI SE) characteristics and mechanical properties of materials on the number of cycles has been determined.
The study's primary goal is to determine carbamate pesticide methomyl's kinetic parameters and de... more The study's primary goal is to determine carbamate pesticide methomyl's kinetic parameters and degradation efficiency from water solution by direct electrochemical oxidation using IrOX anode. Also, define the dependence of the efficiency of methomyl decomposition by direct electrochemical oxidation on the initial concentration of pesticide and electrolyte, applied current, and pH value. The results of methomyl degradation by direct electrochemical oxidation obey the pseudo-first kinetic order. Ultraviolet-visible (UV-Vis) spectroscopy followed the methomyl concentration during the study. The degradation products were studied using the Fourier transform infrared (FT-IR) spectroscopy. Also, this study determines the energy consumption and optimal initial conditions. The phytotoxicity of pesticide and degradation products was studied using mung beans.
M. Abdel-Jawad (Kuwait) AA Alawadhi (Bahrain) R. Al-Sa'ed (Ramallah) MAK Al-Sofi (Al-Khobar)... more M. Abdel-Jawad (Kuwait) AA Alawadhi (Bahrain) R. Al-Sa'ed (Ramallah) MAK Al-Sofi (Al-Khobar) G. Amy (Jeddah) U. Annunziata (Burnham) L. Awerbuch (Winchester, MA) A. Baban (Gebze) WR Bowen (Swansea) L. Broens (Enschede) AA Bushnak (Jeddah) C. Cabassud (Toulouse) A. Chanan (Parramatta) AE Childress (Reno, NV) T.-SN Chung (Singapore) Y. Cohen (Los Angeles, CA) ZF Cui (Oxford) MA Darwish (Kuwait) KD Demadis (Crete) E. Delyannis (Athens) E. Drioli (Arcavacata di Rende) A. Elmidaoui (Kenitra) M. Elimelech (New ...
The presented research focused on the metallization of polyester, cotton, and polyamide 6.6 fabri... more The presented research focused on the metallization of polyester, cotton, and polyamide 6.6 fabrics using the silver conductive complex to allow electric conductivity through the fabric’s surface and enhance the fabric’s mechanical properties. The method used for the metallization of studied fabrics does not require the use of expensive toxic chemicals or electricity, making the process more economically acceptable. The signal attenuation was measured in frequency ranges of 1–4 and 5–12 GHz. After five cycles of metallization, the polyester fabric has higher EMI effectiveness, in a lower range was 45.44 and 57.25 dB. X-ray powder diffractometry (XRD) and infrared spectroscopy with Fourier transform infrared spectrophotometry (FT-IR) characterize the modified tissues. Scanning electron microscopy coupled with energy-dispersion spectroscopy (SEM-EDS) was used to determine layers’ morphology and elemental composition. Also, the water and air permeability of modified textiles was determined.
Adsorption of carbamate pesticide Methomyl by Co-Beta Zeolite particles prepared by wet ion-excha... more Adsorption of carbamate pesticide Methomyl by Co-Beta Zeolite particles prepared by wet ion-exchange method from aqueous solutions was studied. The effect of zeolite and pesticide concentrations, pH value, and sintering temperature on pesticide removal from an aqueous solution was studied. The change of methomyl concentration during the adsorption was followed using the UV-Visible spectrophotometer. Scanning Electron Microscopy-Energy Dispersive X-ray Spectroscopy (SEM-EDS) revealed the modified zeolite morphology and elemental structure. The change of the adsorbent surface before and after dye removal was observed using the Fourier Transformation-infrared spectroscopy (FT-IR). The adsorption kinetics follows the pseudo-second-order kinetics model, and at optimal condition adsorption rate is k1 = 0.0166 g mg-1 min-1. The Langmuir, Freundlich, Temkin and Dubinin-Radushkovich adsorption isotherm models were used to describe the adsorption process. Thermodynamic parameters were also de...
Electromagnetic interference (EMI) has become a widespread modern environmental pollutant. There ... more Electromagnetic interference (EMI) has become a widespread modern environmental pollutant. There is an essential need for practical and applicable materials for its attenuation. Therefore, the presented research has focused on metallization of carbon fabric using the silver conductive complex solution to enhance the surface conductivity and mechanical properties of the fabric. With this amplification and improving the mentioned characteristics, lightweight and flexible modified carbon fibers can be applied in many environments. The modification has been performed in three steps: the silver conductive complex synthesis, carbon fabric immersion into a silver complex solution, treating with temperature for silver deposition by annealing. The method used for the metallization of carbon fabrics surface does not require expensive and toxic chemicals or electricity, making the process more ecologically and economically acceptable. One of the advantages of using the method for surface modification is the possibility of usage for other materials, not only for textiles and foils. The examination of the surface structure, electrical, EMI shielding characteristics, and mechanical properties of carbon fabrics modified by silver deposition contributes to the determination of multifunctional properties of materials. Also, the dependence on the improvement of multispectral electromagnetic interference shielding effectiveness (EMI SE) characteristics and mechanical properties of materials on the number of cycles has been determined.
The presented research focused on the metallization of polyester, cotton, and polyamide 6.6 fabri... more The presented research focused on the metallization of polyester, cotton, and polyamide 6.6 fabrics using the silver conductive complex to allow electric conductivity through the fabric’s surface and enhance the fabric’s mechanical properties. The method used for the metallization of studied fabrics does not require the use of expensive toxic chemicals or electricity, making the process more economically acceptable. The signal attenuation was measured in frequency ranges of 1–4 and 5–12 GHz. After five cycles of metallization, the polyester fabric has higher EMI effectiveness, in a lower range was 45.44 and 57.25 dB. X-ray powder diffractometry (XRD) and infrared spectroscopy with Fourier transform infrared spectrophotometry (FT-IR) characterize the modified tissues. Scanning electron microscopy coupled with energy-dispersion spectroscopy (SEM-EDS) was used to determine layers’ morphology and elemental composition. Also, the water and air permeability of modified textiles was determined.
In recent decades, the expansion of arms development has initiated the need to increase the prote... more In recent decades, the expansion of arms development has initiated the need to increase the protection of people and vehicles from pistol and rifle ammunition. Modern ceramic and ceramic-based materials are lightweight and durable and provide a sufficient level of protection against the penetration and impact of ammunition, which can protect the vital organs of the person. Modern tendencies require the addition of armor to vehicles, which reduces the necessity of excessive bulk steel usage and eliminates large and heavy mass weight amounts. By replacing the armored steel with new ballistic materials, a higher level of ballistic protection could be achieved, as well as reduction of weight, which both allows better mobility and increases the ability of installment of additional battle fighting equipment. Modern ceramic materials used in the production of armor are made by sintering the ceramic powder under certain conditions in a suitable molding tool. The chapter will cover the short material requirements, and material responses to ballistic impact, production methods, and applications. Also, the chapter will include the usage of ceramic fibers, alumina, silicon and boron carbide, titanium diboride, and ballistic materials that consist of a ceramic face bonded to a reinforced plastic laminate or metallic backplate.
Adsorption of carbamate pesticide Methomyl by Co-Beta Zeolite particles prepared by wet ion-excha... more Adsorption of carbamate pesticide Methomyl by Co-Beta Zeolite particles prepared by wet ion-exchange method from aqueous solutions was studied. The effect of zeolite and pesticide concentrations, pH value, and sintering temperature on pesticide removal from an aqueous solution was studied. The change of methomyl concentration during the adsorption was followed using the UV-Visible spectrophotometer. Scanning Electron Microscopy-Energy Dispersive X-ray Spectroscopy (SEM-EDS) revealed the modified zeolite morphology and elemental structure. The change of the adsorbent surface before and after dye removal was observed using the Fourier Transformation-infrared spectroscopy (FT-IR). The adsorption kinetics follows the pseudo-second-order kinetics model, and at optimal condition adsorption rate is k1 = 0.0166 g mg-1 min-1. The Langmuir, Freundlich, Temkin and Dubinin-Radushkovich adsorption isotherm models were used to describe the adsorption process. Thermodynamic parameters were also de...
The influence of samarium, as an additional alloying element, on the morphology and corrosion per... more The influence of samarium, as an additional alloying element, on the morphology and corrosion performance of the Zn-Co-Sm alloy electrodeposited coatings, was investigated by scanning electron microscopy coupled with energy dispersive X-ray spectroscopy (SEM/EDS) and electrochemical impedance spectroscopy (EIS) measurements. The Zn-Co-Sm coatings were electrodeposited from the aqueous solution containing Sm(NO3)3, ZnCl2, and CoCl2 as the metal ion source. The percentage of Sm in the coating may be very finely tuned by setting electrodeposition parameters, including cathodic current density, glycine concentration in the electroplating solution, and the solution temperature. The coatings with Sm content from 0.5 to 18.5 wt.% were produced. Since low deposition current densities (10–50 mA cm−2) were applied, the samples obtained were of good adhesion and compact. The presence of Sm2O3 inclusion was verified by XRD as the Sm2O3 crystalline phase. Samarium is incorporated in the coatings...
AbstractSorption of the Zn2+ and Ni2+ ions by the Na+-enriched natural clinoptilolite (Na-CLI) fr... more AbstractSorption of the Zn2+ and Ni2+ ions by the Na+-enriched natural clinoptilolite (Na-CLI) from aqueous solutions containing both Zn2+ and Ni2+ ions at a range of concentrations has been studied at 298, 308, and 318 K. It was found that the sorption of a particular ion by Na-CLI increases with the increase in the initial concentration of the solution of that ion. At a given initial concentration, the sorption degree increases with temperature. Also, the sorption of a particular ion is greater when the initial solution contains a second ion than it is when the particular ion is present alone. The sorption kinetics is in accord with the pseudo-second-order reaction rate model. The values of the k2 rate constant do not show a regular change with the initial Zn2+/Ni2+ concentrations probably because the presence of the second ion has a significant effect on the reaction rate. Thermodynamic study has shown that the sorption is exothermic, occurring spontaneously in the 298–318 K range and with a positive e...
Silver coated textiles as multifunctional flexible materials, 2023
Among numerous active electrode materials, nowadays applied in capacitor devices, silver nanostru... more Among numerous active electrode materials, nowadays applied in capacitor devices, silver nanostructures represent promising electrodes for electrochemical capacitors, owing to their acceptable cost, large surface area and high electrical conductivity. In this work we investigate the electrochemical capacitance and electromagnetic interference shielding effect of two textile materials: polyester and cotton fabrics, coated with silver particles. The multifunctional materials were prepared in a manner that the fabrics were immersed into a silver complex solution and subsequently dried in the air and heated to induce silver deposition by annealing. This synthesis method does not apply electricity or any specific chemicals, and so the process is more economically acceptable for production of lightweight and flexible conductive materials. Characterization of the modified textiles and deposited silver particles were performed by scanning electron microscopy coupled with energy-dispersive spectroscopy (SEM-EDS), as well as with X-ray diffractometry (XRD). The capacitance and the amount of the electric charge stored were measured in the two electrolytes (KCl and NaOH), and for electrodes prepared by one, three, or five cycles of fabrics immersion in the silver solution. The capacitance was measured by cyclic voltammetry, while the capacity for electric charge storage was calculated from the recorded charge-discharge curves at the textile working electrodes. The signal attenuation was measured in the frequency range of 300-1000 MHz. After five cycles of metallization, the electromagnetic interference shielding (EMI SE) of silver coated cotton fabric in a lower examined range was 23.26 dB.
The presented research focused on the metallization of polyester, cotton, and polyamide 6.6 fabri... more The presented research focused on the metallization of polyester, cotton, and polyamide 6.6 fabrics using the silver conductive complex to allow electric conductivity through the fabric’s surface and enhance the fabric’s mechanical properties. The method used for the metallization of studied fabrics does not require the use of expensive toxic chemicals or electricity, making the process more economically acceptable. The signal attenuation was measured in frequency ranges of 1–4 and 5–12 GHz. After five cycles of metallization, the polyester fabric has higher EMI effectiveness, in a lower range was 45.44 and 57.25 dB. X-ray powder diffractometry (XRD) and infrared spectroscopy with Fourier transform infrared spectrophotometry (FT-IR) characterize the modified tissues. Scanning electron microscopy coupled with energy-dispersion spectroscopy (SEM-EDS) was used to determine layers’ morphology and elemental composition. Also, the water and air permeability of modified textiles was determined.
The study's primary goal is to determine carbamate pesticide methomyl's kinetic parameters and de... more The study's primary goal is to determine carbamate pesticide methomyl's kinetic parameters and degradation efficiency from water solution by direct electrochemical oxidation using IrOX anode. Also, define the dependence of the efficiency of methomyl decomposition by direct electrochemical oxidation on the initial concentration of pesticide and electrolyte, applied current, and pH value. The results of methomyl degradation by direct electrochemical oxidation obey the pseudo-first kinetic order. Ultraviolet-visible (UV-Vis) spectroscopy followed the methomyl concentration during the study. The degradation products were studied using the Fourier transform infrared (FT-IR) spectroscopy. Also, this study determines the energy consumption and optimal initial conditions. The phytotoxicity of pesticide and degradation products was studied using mung beans.
Electromagnetic interference (EMI) has become a widespread modern environmental pollutant. There ... more Electromagnetic interference (EMI) has become a widespread modern environmental pollutant. There is an essential need for practical and applicable materials for its attenuation. Therefore, the presented research has focused on metallization of carbon fabric using the silver conductive complex solution to enhance the surface conductivity and mechanical properties of the fabric. With this amplification and improving the mentioned characteristics, lightweight and flexible modified carbon fibers can be applied in many environments. The modification has been performed in three steps: the silver conductive complex synthesis, carbon fabric immersion into a silver complex solution, treating with temperature for silver deposition by annealing. The method used for the metallization of carbon fabrics surface does not require expensive and toxic chemicals or electricity, making the process more ecologically and economically acceptable. One of the advantages of using the method for surface modification is the possibility of usage for other materials, not only for textiles and foils. The examination of the surface structure, electrical, EMI shielding characteristics, and mechanical properties of carbon fabrics modified by silver deposition contributes to the determination of multifunctional properties of materials. Also, the dependence on the improvement of multispectral electromagnetic interference shielding effectiveness (EMI SE) characteristics and mechanical properties of materials on the number of cycles has been determined.
The presented research focused on the metallization of polyester, cotton, and polyamide 6.6 fabri... more The presented research focused on the metallization of polyester, cotton, and polyamide 6.6 fabrics using the silver conductive complex to allow electric conductivity through the fabric’s surface and enhance the fabric’s mechanical properties. The method used for the metallization of studied fabrics does not require the use of expensive toxic chemicals or electricity, making the process more economically acceptable. The signal attenuation was measured in frequency ranges of 1–4 and 5–12 GHz. After five cycles of metallization, the polyester fabric has higher EMI effectiveness, in a lower range was 45.44 and 57.25 dB. X-ray powder diffractometry (XRD) and infrared spectroscopy with Fourier transform infrared spectrophotometry (FT-IR) characterize the modified tissues. Scanning electron microscopy coupled with energy-dispersion spectroscopy (SEM-EDS) was used to determine layers’ morphology and elemental composition. Also, the water and air permeability of modified textiles was determined.
Electromagnetic interference (EMI) has become a widespread modern environmental pollutant. There ... more Electromagnetic interference (EMI) has become a widespread modern environmental pollutant. There is an essential need for practical and applicable materials for its attenuation. Therefore, the presented research has focused on metallization of carbon fabric using the silver conductive complex solution to enhance the surface conductivity and mechanical properties of the fabric. With this amplification and improving the mentioned characteristics, lightweight and flexible modified carbon fibers can be applied in many environments. The modification has been performed in three steps: the silver conductive complex synthesis, carbon fabric immersion into a silver complex solution, treating with temperature for silver deposition by annealing. The method used for the metallization of carbon fabrics surface does not require expensive and toxic chemicals or electricity, making the process more ecologically and economically acceptable. One of the advantages of using the method for surface modification is the possibility of usage for other materials, not only for textiles and foils. The examination of the surface structure, electrical, EMI shielding characteristics, and mechanical properties of carbon fabrics modified by silver deposition contributes to the determination of multifunctional properties of materials. Also, the dependence on the improvement of multispectral electromagnetic interference shielding effectiveness (EMI SE) characteristics and mechanical properties of materials on the number of cycles has been determined.
The study's primary goal is to determine carbamate pesticide methomyl's kinetic parameters and de... more The study's primary goal is to determine carbamate pesticide methomyl's kinetic parameters and degradation efficiency from water solution by direct electrochemical oxidation using IrOX anode. Also, define the dependence of the efficiency of methomyl decomposition by direct electrochemical oxidation on the initial concentration of pesticide and electrolyte, applied current, and pH value. The results of methomyl degradation by direct electrochemical oxidation obey the pseudo-first kinetic order. Ultraviolet-visible (UV-Vis) spectroscopy followed the methomyl concentration during the study. The degradation products were studied using the Fourier transform infrared (FT-IR) spectroscopy. Also, this study determines the energy consumption and optimal initial conditions. The phytotoxicity of pesticide and degradation products was studied using mung beans.
M. Abdel-Jawad (Kuwait) AA Alawadhi (Bahrain) R. Al-Sa'ed (Ramallah) MAK Al-Sofi (Al-Khobar)... more M. Abdel-Jawad (Kuwait) AA Alawadhi (Bahrain) R. Al-Sa'ed (Ramallah) MAK Al-Sofi (Al-Khobar) G. Amy (Jeddah) U. Annunziata (Burnham) L. Awerbuch (Winchester, MA) A. Baban (Gebze) WR Bowen (Swansea) L. Broens (Enschede) AA Bushnak (Jeddah) C. Cabassud (Toulouse) A. Chanan (Parramatta) AE Childress (Reno, NV) T.-SN Chung (Singapore) Y. Cohen (Los Angeles, CA) ZF Cui (Oxford) MA Darwish (Kuwait) KD Demadis (Crete) E. Delyannis (Athens) E. Drioli (Arcavacata di Rende) A. Elmidaoui (Kenitra) M. Elimelech (New ...
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Papers by Stevan Stupar
silver conductive complex to allow electric conductivity through the fabric’s surface and enhance the fabric’s
mechanical properties. The method used for the metallization of studied fabrics does not require the use of
expensive toxic chemicals or electricity, making the process more economically acceptable. The signal attenuation
was measured in frequency ranges of 1–4 and 5–12 GHz. After five cycles of metallization, the polyester
fabric has higher EMI effectiveness, in a lower range was 45.44 and 57.25 dB. X-ray powder diffractometry (XRD)
and infrared spectroscopy with Fourier transform infrared spectrophotometry (FT-IR) characterize the modified
tissues. Scanning electron microscopy coupled with energy-dispersion spectroscopy (SEM-EDS) was used to
determine layers’ morphology and elemental composition. Also, the water and air permeability of modified
textiles was determined.
essential need for practical and applicable materials for its attenuation. Therefore, the presented research has
focused on metallization of carbon fabric using the silver conductive complex solution to enhance the surface
conductivity and mechanical properties of the fabric. With this amplification and improving the mentioned
characteristics, lightweight and flexible modified carbon fibers can be applied in many environments. The
modification has been performed in three steps: the silver conductive complex synthesis, carbon fabric immersion
into a silver complex solution, treating with temperature for silver deposition by annealing. The method
used for the metallization of carbon fabrics surface does not require expensive and toxic chemicals or electricity,
making the process more ecologically and economically acceptable. One of the advantages of using the method
for surface modification is the possibility of usage for other materials, not only for textiles and foils. The examination
of the surface structure, electrical, EMI shielding characteristics, and mechanical properties of carbon
fabrics modified by silver deposition contributes to the determination of multifunctional properties of materials.
Also, the dependence on the improvement of multispectral electromagnetic interference shielding effectiveness
(EMI SE) characteristics and mechanical properties of materials on the number of cycles has been determined.
silver conductive complex to allow electric conductivity through the fabric’s surface and enhance the fabric’s
mechanical properties. The method used for the metallization of studied fabrics does not require the use of
expensive toxic chemicals or electricity, making the process more economically acceptable. The signal attenuation
was measured in frequency ranges of 1–4 and 5–12 GHz. After five cycles of metallization, the polyester
fabric has higher EMI effectiveness, in a lower range was 45.44 and 57.25 dB. X-ray powder diffractometry (XRD)
and infrared spectroscopy with Fourier transform infrared spectrophotometry (FT-IR) characterize the modified
tissues. Scanning electron microscopy coupled with energy-dispersion spectroscopy (SEM-EDS) was used to
determine layers’ morphology and elemental composition. Also, the water and air permeability of modified
textiles was determined.
essential need for practical and applicable materials for its attenuation. Therefore, the presented research has
focused on metallization of carbon fabric using the silver conductive complex solution to enhance the surface
conductivity and mechanical properties of the fabric. With this amplification and improving the mentioned
characteristics, lightweight and flexible modified carbon fibers can be applied in many environments. The
modification has been performed in three steps: the silver conductive complex synthesis, carbon fabric immersion
into a silver complex solution, treating with temperature for silver deposition by annealing. The method
used for the metallization of carbon fabrics surface does not require expensive and toxic chemicals or electricity,
making the process more ecologically and economically acceptable. One of the advantages of using the method
for surface modification is the possibility of usage for other materials, not only for textiles and foils. The examination
of the surface structure, electrical, EMI shielding characteristics, and mechanical properties of carbon
fabrics modified by silver deposition contributes to the determination of multifunctional properties of materials.
Also, the dependence on the improvement of multispectral electromagnetic interference shielding effectiveness
(EMI SE) characteristics and mechanical properties of materials on the number of cycles has been determined.