Medical textiles are one of the most rapidly growing parts of the technical textiles sector of th... more Medical textiles are one of the most rapidly growing parts of the technical textiles sector of the textile industry. This work was developed for biocompatible materials of curcumin / TiO2 nanocomposite fabricated on the surface of cotton fabric for medical applications. Cotton fabric was pretreated with three crosslinking agents namely, citric acid, Quat-188, and GPTMS. Applying nanocomposite on modified cotton fabric using pad-dry cure method. The chemistry and morphology of modified fabrics are examined by Fourier-transformed infrared spectroscopy, energy-dispersive X-ray spectroscopy, and scanning electron microscopy. In addition, the chemical mechanism for nanocomposite modified fabric was reported. UV protection (UPF) and antibacterial properties against Gram - positive S. aureus and Gram - negative E. coli bacterial strains were investigated. The durability of fabrics to 20 washing cycles was also examined. Results demonstrated that nanocomposite modified cotton fabric exhibit...
Herein we present an intensive investigation into the application of a copolymer formed through i... more Herein we present an intensive investigation into the application of a copolymer formed through iodine transfer copolymerization of vinylidene fluoride with 2,3,3,3-tetrafluoro-1-propene. The unique properties of the pre-formed copolymer advocate it for inducing sustainable, multi-functionalized cotton-based textiles. The application of the preformed copolymer is carried out via the treatment of the cotton and cotton/polyester blend fabrics with the copolymer. The improvement of the physico-mechanical properties as well as the encapsulation of the copolymer within the cotton structure alone and in combination with polyester were affected by the absence and presence of epichlorohydrin as a crosslinking agent. A system consisting of the fibercopolymer-crosslinking agent may result in mechanical entrapping and deposition of the copolymer in the structure of cotton. They work together with encapsulation for sustainable fixation of the copolymer in the overall structure of the fabrics either 100% cotton or cotton/polyester blend fabric (50/50). The augmentation was barely significant in smoothness and elongation at break of fabrics treated with the copolymer along with the crosslinking agent. SEM discovered that the treated fabrics are covered with a deposited film with tiny particles that can penetrate the fabric. EDX analysis confirms the presence of both fluorine and iodine. Also found was a polymer coating based on fluorine and iodine deposition leading to a hydrophobic product. Values of WRA of the treated fabrics place them in easy-care category with marginal losses in tensile strength and with the certainty that the treated fabric acquires waterproof properties.
This research presents new approach for functionalization of cotton fabrics against antibacterial... more This research presents new approach for functionalization of cotton fabrics against antibacterial. It comprises: (a) synthesis and characterization of two polymeric products that can referred to as reactive copolymer (monochlorotriazinyl--cyclodextrin grafted with acrylic acid AA, MCT-CD-g-PAA) and normal copolymer (-cyclodextrin grafted with acrylic acid AA, CD-g-PAA), (b) reacting cotton with the reactive copolymer (c) treatment of the chemically modified cotton so-obtained with silver nitrate, (d) in situ reduction of silver ions using either the copolymer (CD-g-PAA) or a conventional reducing agent, namely, sodium borohydride, and (e) monitoring the antibacterial activity and resilience properties of the modified cotton fabrics. FTIR, SEM, and X-ray diffraction were employed to prove the structure of the synthesized polymeric products as well as micro structural changes in cotton cellulose as a result of the aforementioned treatments. The finished fabrics displayed superior antibacterial activity along with good fabric stabilization as indeed by fabric resilience.
... sodium citrate, hydrazine, ascorbic acid, glucose and -ray or 41 UV irradiation, were utilize... more ... sodium citrate, hydrazine, ascorbic acid, glucose and -ray or 41 UV irradiation, were utilized ... Thus, it is corroborated that the bactericidal effect of silver 459 nanoparticles is size ... conventional thermal method is very comparable with those prepared by the microwave 462 method ...
Medical textiles are one of the most rapidly growing parts of the technical textiles sector in th... more Medical textiles are one of the most rapidly growing parts of the technical textiles sector in the textile industry. This work aims to investigate the medical applications of a curcumin/TiO2 nanocomposite fabricated on the surface of cotton fabric. The cotton fabric was pretreated with three crosslinking agents, namely citric acid, 3-Chloro-2-hydroxypropyl trimethyl ammonium chloride (Quat 188) and 3-glycidyloxypropyltrimethoxysilane (GPTMS), by applying the nanocomposite to the modified cotton fabric using the pad-dry-cure method. The chemistry and morphology of the modified fabrics were examined by Fourier transform infrared spectroscopy, energy-dispersive X-ray spectroscopy, and scanning electron microscopy. In addition, the chemical mechanism for the nanocomposite-modified fabric was reported. UV protection (UPF) and antibacterial properties against Gram-positive S. aureus and Gram-negative E. coli bacterial strains were investigated. The durability of the fabrics to 20 washing ...
Industrial & Engineering Chemistry Research, 2016
In situ synthesis of titanium oxide nanoparticles (TiO 2 NPs) on cotton fabrics was innovatively ... more In situ synthesis of titanium oxide nanoparticles (TiO 2 NPs) on cotton fabrics was innovatively studied. The synthesis involved the use of titanium isopropoxide (TIP) as a source of titanium hydroxide and urea nitrate as a peptizing agent responsible for conversion of titanium hydroxide to TiO 2 NPs. Characterization of TiO 2 NPs was performed using SEM-EDX, XRD, FTIR, TEM, particle size analyzer and zeta potential. Results obtained signify the following features. TiO 2 NPs are deposited in the form of coating on the surface of cotton fibres. They are composed of aggregated nanoparticles with an average size dimension that does not exceed 50 nm. On the other hand, TiO 2 NPs-loaded cotton fabrics exhibits bacterial reduction of more than 95% which is sustainable even after 20 washing cycles; the bacterial reduction increases by increasing urea nitrate concentration used in the synthesis of TiO 2 NPs. Cotton fabrics coated with TiO 2 NPs displays excellent UV protection before and after washing.
Unique technique is currently demonstrated for preparation of ultraviolet protective cotton fabri... more Unique technique is currently demonstrated for preparation of ultraviolet protective cotton fabrics with full shielding effect, via self-implantation of palladium (Pd) nanoclusters. Palladium nanoclusters were in-situ immobilized within native and cationized cotton using two different concentrations of palladium precursor (20 and 60 mM) under strong acidic (pH 2) and basic (pH 11.5) media. Cationization (50 and 100%) of cotton fabrics was performed in order to increase the accessibility of fabric for controllable implantation of palladium nanoclusters. Size distribution of palladium nanoclusters in supernatant solution was estimated via Transmission electron microscopy to be 3.2 nm. The estimated data showed that the sample prepared with the highest cationization percent and highest concentration of palladium precursor in strong alkaline medium exhibited the highest yellowness index, color strength and excellent ultraviolet shielding effects. The yellowness index was significantly i...
International Journal of Biological Macromolecules
Herein, a newly developed approach for durable antibacterial cotton fabrics coated carboxymethyl ... more Herein, a newly developed approach for durable antibacterial cotton fabrics coated carboxymethyl chitosan (CMCs) via ionic crosslinking driven by cationization of cotton surface (CC) with 3-chloro-2-hydroxyl propyl-trimethyl ammonium chloride (CHTAC). In this regard, the novelty was extended to impart a highly antibacterial activity through harnessing of the as-functionalized CMCs/CC in situ preparation of AgNPs, without using of hazardous reductants. The antibacterial activity of the in situ prepared AgNPs onto CMCs/CC as well as the in vivo study on the rat lab were investigated to evaluate their healing efficiency, pathological tissues and biomarkers. Results affirmed that the treatment of CC with 10% of CMCs was adequate to achieve the highest swelling ratio which, in turns, is able to in situ deposition of AgNPs with a size range of 2-10 nm onto CC/CMCs rendering them a highly durable antibacterial activity against both Gram +Ve and Gram -Ve bacteria, which had a bacterial reduction of 98% to 86% after 20 washing cycles. Furthermore, the in vivo study revealed effectively the advantageous uses of the cotton functionalized with AgNPs compared to CC/CMCs in wound healing via alleviating the oxidative stress and promoting hyaluronic acid in wounded skin as well as increasing RUNX2 in healed skin tissues.
Unique technique is currently demonstrated for preparation of ultraviolet protective cotton fabri... more Unique technique is currently demonstrated for preparation of ultraviolet protective cotton fabrics with full shielding effect, via self-implantation of palladium nanopanciles. Palladium (Pd) nanopanciles were in-situ immobilized within native & cationized cotton using two different concentrations of palladium precursor (20 & 60 mM) under strong acidic (pH 2) and basic (pH 11.5) media. Cationization (50% and 100%) of cotton fabrics was performed in order to increase the accessibility of fabric for controllable implantation of palladium nanopanciles. Size distribution of palladium nanopanciles in supernatant solution was estimated via Transmission electron microscopy to be 3.2 nm. The estimated data showed that the sample prepared with the highest cationization percent and highest concentration of palladium precursor in strong alkaline medium exhibited the highest yellowness index, color strength and excellent ultraviolet shielding effects. The yellowness index was significantly incr...
Moringa oleifera leaf extract (ME) has been developed as an ecofriendly antibacterial agent for f... more Moringa oleifera leaf extract (ME) has been developed as an ecofriendly antibacterial agent for fabrics made from cotton or its modified forms, carboxymethyl cellulose and cationic cotton. In addition, we prepared silver nanoparticles (AgNPs) with particle size ranged from 15-25 nm by using polyvinyl alcohol and glucose as reducing agent matrix to improve the antibacterial activity of cellulosic fabric finished with Moringa extract. The prepared silver nanoparticles were characterized by using UV-Vis spectra, Transmission electron microscopy and X-ray diffraction. Scanning electron microscopy was used to characterize the morphology of finished fabric surface. The mechanical properties of the finished fabric was evaluated. Also, the antibacterial activity of finished fabric was evaluated via both disk diffusion method on an agar plate and bacterial count colony method (bacterial reduction percent). The Moringa extract and silver nanoparticles finished fabric showed excellent antibacterial activity against S. aureus as Grampositive bacteria and E. coli as Gram-negative bacteria so that they can be used as biocompatible and safe antibacterial finishing agent for cellulosic fabric.
This is a PDF file of an article that has undergone enhancements after acceptance, such as the ad... more This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.
Industrial & Engineering Chemistry Research, 2019
Herein, antibacterial activity and water repellent cotton fabrics with UV protection were carried... more Herein, antibacterial activity and water repellent cotton fabrics with UV protection were carried out through in situ chemical deposition of SiO 2 nanosols. Ammonium hydroxide was used as a gentile catalyst to initiate the polycondensation reaction inside the fabrics. During deposition of SiO 2 nanosols onto cellulose of cotton, the process was integrated with TiO 2 nanosols to evaluate the cooperative properties of the formed SiO 2 /TiO 2 nanosols onto cotton fabrics. Furthermore, the water repellent property was induced to the loaded cotton fabrics by further polycondensation with octamethyltrisiloxane (OMTS). Results revealed that, both SiO 2 and TiO 2 as well as mixtures therefrom were in situ deposited onto cotton fabrics, separately, in size ranging from 5-10nm as indicated from TEM. Results from XRD and FTIR clearly proved, respectively, the crystallographic profile and chemical structure of nanosols loaded inside
Herein we present a novel approach for synthesis, characterization and application of a benign hy... more Herein we present a novel approach for synthesis, characterization and application of a benign hyperbranched polyester amide-silver nanohybrid (Ag/HBPEA). The Ag/HBPEA is developed through three distinct steps. The first step involves amidation reaction of diethanol amine and maleic anhydride to yield AB2 monomer (adduct 1). The second step comprises reaction of adduct 1 with trimethylol propane in presence of catalyst to yield HBPEA. The third step entails reduction of silver nitrate by sodium borohydride reductant to effect in situ formation of AgNPs which are stabilized by HBPEA, leading ultimately to Ag/HBPEA nanohybrid. Both Ag/ HBPEA nanohybrid and HBPEA are independently applied to cotton fabrics as per the conventional paddry-cure technique. To this end, through investigations into the structures of Ag/HBPEA nanohybrid and HBPEA stabilizer before and after application to cotton fabric using advanced techniques emphasize the Ag/HBPEA nanohybrid as multifunctional finishing agent rather than a super antibacterial activity of the cotton fabrics after treatment with Ag/ HBPEA nanohybrid speaks of this. Current research generally addresses green chemistry because treatments involved therein are based on green basics and practices.
IMPROVEMENT of physical properties in an addition to imparting antimicrobial properties to cotton... more IMPROVEMENT of physical properties in an addition to imparting antimicrobial properties to cotton fabric and modified cotton fabric by using herbal in the presence of softeners is the target of the present work, first of all modification of cotton fabric was done during cationization process by the means of cationized agent, namely, 3-chloro-2-hydroxypropyl trimethyl ammonium chloride (Quat-188); also, cotton fabric was modified during carboxymethylation process of it. Then treatments of cotton and modified cotton fabrics were carried out by different concentration of both Neem and Tulsi Extract as essential oil in the presence of Silicon Micro Emulsion (SiME) or Nonionic softeners for improving the performance of the treated fabric. Physical properties evaluations of the treated fabric were done by monitoring tensile strength, elongation, roughness, water absorbency (wettability). Finally, the treated fabrics were evaluated as antimicrobial and characterized by the mean of Scanning Electron Microscope (SEM).
ω-Hydroxy functionalized poly(vinylidene fluoride) prepared in a water-based non-fluorinated solv... more ω-Hydroxy functionalized poly(vinylidene fluoride) prepared in a water-based non-fluorinated solvent by iodine transfer copolymerization VDF and 1234yf.
Systematic application of topical drugs has been widely prescribed as an effective treatment for ... more Systematic application of topical drugs has been widely prescribed as an effective treatment for skin disorders. However, the widespread use of such topical drugs is also associated with emergence of resistant strains of microorganisms resulting in patients resist for one or more antibiotics. Nicotinamide, a water-soluble amide of nicotinic acid and a common topical drug, is approved as anti-acne drug with anti-inflammatory potentials. Encapsulation of nicotinamide into electrospun water-soluble matrix that chemically crosslinked is the approach to control its release. In this research, biocompatible nano-fibrous mat was developed with hydroxyethyl cellulose (HEC) blended with poly(vinyl alcohol) (PVA) by electro-spinning technique. The concentration of HEC (5% w/v) with PVA (10% w/v) was optimized, blended in different ratios (20-50% HEC concentration) and electro-spun to get smooth nano-fibers. Nicotinamide was successfully encapsulated in the electro-spun fibers. Nicotinamide release was controlled via chemical cross-linking of the produced mat. Selected parameters of spinning solutions (viscosity and conductivity) and process parameters (applied voltage and needle-to-collector distance) were studied. The microstructure, morphology of blended HEC/PVA, nicotinamide-loaded nano-fiber, cross-linked HEC/PVA nano-fibrous scaffolds were characterized by scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FTIR). SEM images showed that the mean diameters of blend nanofibers were ranged from 80 to 60 nm. The release profile of the nicotinamide was demonstrated. Release profile of the uncrosslinked and crosslinked mats were demonstred. Immortalized human skin fibroblasts cells were used to examine the biocompatibility of the produced HEC/PVA/ nicotinamide electrospun mats.
Innovative starch-based polymeric products were synthesized for utilization as sizing agents, flo... more Innovative starch-based polymeric products were synthesized for utilization as sizing agents, flocculants, and finishing agents. The synthesis involved reaction of starch and hydrolyzed starches with monochlorotriazinyl-β-cyclodextrin (MCT-β-CD) to yield starch grafted with ...
Medical textiles are one of the most rapidly growing parts of the technical textiles sector of th... more Medical textiles are one of the most rapidly growing parts of the technical textiles sector of the textile industry. This work was developed for biocompatible materials of curcumin / TiO2 nanocomposite fabricated on the surface of cotton fabric for medical applications. Cotton fabric was pretreated with three crosslinking agents namely, citric acid, Quat-188, and GPTMS. Applying nanocomposite on modified cotton fabric using pad-dry cure method. The chemistry and morphology of modified fabrics are examined by Fourier-transformed infrared spectroscopy, energy-dispersive X-ray spectroscopy, and scanning electron microscopy. In addition, the chemical mechanism for nanocomposite modified fabric was reported. UV protection (UPF) and antibacterial properties against Gram - positive S. aureus and Gram - negative E. coli bacterial strains were investigated. The durability of fabrics to 20 washing cycles was also examined. Results demonstrated that nanocomposite modified cotton fabric exhibit...
Herein we present an intensive investigation into the application of a copolymer formed through i... more Herein we present an intensive investigation into the application of a copolymer formed through iodine transfer copolymerization of vinylidene fluoride with 2,3,3,3-tetrafluoro-1-propene. The unique properties of the pre-formed copolymer advocate it for inducing sustainable, multi-functionalized cotton-based textiles. The application of the preformed copolymer is carried out via the treatment of the cotton and cotton/polyester blend fabrics with the copolymer. The improvement of the physico-mechanical properties as well as the encapsulation of the copolymer within the cotton structure alone and in combination with polyester were affected by the absence and presence of epichlorohydrin as a crosslinking agent. A system consisting of the fibercopolymer-crosslinking agent may result in mechanical entrapping and deposition of the copolymer in the structure of cotton. They work together with encapsulation for sustainable fixation of the copolymer in the overall structure of the fabrics either 100% cotton or cotton/polyester blend fabric (50/50). The augmentation was barely significant in smoothness and elongation at break of fabrics treated with the copolymer along with the crosslinking agent. SEM discovered that the treated fabrics are covered with a deposited film with tiny particles that can penetrate the fabric. EDX analysis confirms the presence of both fluorine and iodine. Also found was a polymer coating based on fluorine and iodine deposition leading to a hydrophobic product. Values of WRA of the treated fabrics place them in easy-care category with marginal losses in tensile strength and with the certainty that the treated fabric acquires waterproof properties.
This research presents new approach for functionalization of cotton fabrics against antibacterial... more This research presents new approach for functionalization of cotton fabrics against antibacterial. It comprises: (a) synthesis and characterization of two polymeric products that can referred to as reactive copolymer (monochlorotriazinyl--cyclodextrin grafted with acrylic acid AA, MCT-CD-g-PAA) and normal copolymer (-cyclodextrin grafted with acrylic acid AA, CD-g-PAA), (b) reacting cotton with the reactive copolymer (c) treatment of the chemically modified cotton so-obtained with silver nitrate, (d) in situ reduction of silver ions using either the copolymer (CD-g-PAA) or a conventional reducing agent, namely, sodium borohydride, and (e) monitoring the antibacterial activity and resilience properties of the modified cotton fabrics. FTIR, SEM, and X-ray diffraction were employed to prove the structure of the synthesized polymeric products as well as micro structural changes in cotton cellulose as a result of the aforementioned treatments. The finished fabrics displayed superior antibacterial activity along with good fabric stabilization as indeed by fabric resilience.
... sodium citrate, hydrazine, ascorbic acid, glucose and -ray or 41 UV irradiation, were utilize... more ... sodium citrate, hydrazine, ascorbic acid, glucose and -ray or 41 UV irradiation, were utilized ... Thus, it is corroborated that the bactericidal effect of silver 459 nanoparticles is size ... conventional thermal method is very comparable with those prepared by the microwave 462 method ...
Medical textiles are one of the most rapidly growing parts of the technical textiles sector in th... more Medical textiles are one of the most rapidly growing parts of the technical textiles sector in the textile industry. This work aims to investigate the medical applications of a curcumin/TiO2 nanocomposite fabricated on the surface of cotton fabric. The cotton fabric was pretreated with three crosslinking agents, namely citric acid, 3-Chloro-2-hydroxypropyl trimethyl ammonium chloride (Quat 188) and 3-glycidyloxypropyltrimethoxysilane (GPTMS), by applying the nanocomposite to the modified cotton fabric using the pad-dry-cure method. The chemistry and morphology of the modified fabrics were examined by Fourier transform infrared spectroscopy, energy-dispersive X-ray spectroscopy, and scanning electron microscopy. In addition, the chemical mechanism for the nanocomposite-modified fabric was reported. UV protection (UPF) and antibacterial properties against Gram-positive S. aureus and Gram-negative E. coli bacterial strains were investigated. The durability of the fabrics to 20 washing ...
Industrial & Engineering Chemistry Research, 2016
In situ synthesis of titanium oxide nanoparticles (TiO 2 NPs) on cotton fabrics was innovatively ... more In situ synthesis of titanium oxide nanoparticles (TiO 2 NPs) on cotton fabrics was innovatively studied. The synthesis involved the use of titanium isopropoxide (TIP) as a source of titanium hydroxide and urea nitrate as a peptizing agent responsible for conversion of titanium hydroxide to TiO 2 NPs. Characterization of TiO 2 NPs was performed using SEM-EDX, XRD, FTIR, TEM, particle size analyzer and zeta potential. Results obtained signify the following features. TiO 2 NPs are deposited in the form of coating on the surface of cotton fibres. They are composed of aggregated nanoparticles with an average size dimension that does not exceed 50 nm. On the other hand, TiO 2 NPs-loaded cotton fabrics exhibits bacterial reduction of more than 95% which is sustainable even after 20 washing cycles; the bacterial reduction increases by increasing urea nitrate concentration used in the synthesis of TiO 2 NPs. Cotton fabrics coated with TiO 2 NPs displays excellent UV protection before and after washing.
Unique technique is currently demonstrated for preparation of ultraviolet protective cotton fabri... more Unique technique is currently demonstrated for preparation of ultraviolet protective cotton fabrics with full shielding effect, via self-implantation of palladium (Pd) nanoclusters. Palladium nanoclusters were in-situ immobilized within native and cationized cotton using two different concentrations of palladium precursor (20 and 60 mM) under strong acidic (pH 2) and basic (pH 11.5) media. Cationization (50 and 100%) of cotton fabrics was performed in order to increase the accessibility of fabric for controllable implantation of palladium nanoclusters. Size distribution of palladium nanoclusters in supernatant solution was estimated via Transmission electron microscopy to be 3.2 nm. The estimated data showed that the sample prepared with the highest cationization percent and highest concentration of palladium precursor in strong alkaline medium exhibited the highest yellowness index, color strength and excellent ultraviolet shielding effects. The yellowness index was significantly i...
International Journal of Biological Macromolecules
Herein, a newly developed approach for durable antibacterial cotton fabrics coated carboxymethyl ... more Herein, a newly developed approach for durable antibacterial cotton fabrics coated carboxymethyl chitosan (CMCs) via ionic crosslinking driven by cationization of cotton surface (CC) with 3-chloro-2-hydroxyl propyl-trimethyl ammonium chloride (CHTAC). In this regard, the novelty was extended to impart a highly antibacterial activity through harnessing of the as-functionalized CMCs/CC in situ preparation of AgNPs, without using of hazardous reductants. The antibacterial activity of the in situ prepared AgNPs onto CMCs/CC as well as the in vivo study on the rat lab were investigated to evaluate their healing efficiency, pathological tissues and biomarkers. Results affirmed that the treatment of CC with 10% of CMCs was adequate to achieve the highest swelling ratio which, in turns, is able to in situ deposition of AgNPs with a size range of 2-10 nm onto CC/CMCs rendering them a highly durable antibacterial activity against both Gram +Ve and Gram -Ve bacteria, which had a bacterial reduction of 98% to 86% after 20 washing cycles. Furthermore, the in vivo study revealed effectively the advantageous uses of the cotton functionalized with AgNPs compared to CC/CMCs in wound healing via alleviating the oxidative stress and promoting hyaluronic acid in wounded skin as well as increasing RUNX2 in healed skin tissues.
Unique technique is currently demonstrated for preparation of ultraviolet protective cotton fabri... more Unique technique is currently demonstrated for preparation of ultraviolet protective cotton fabrics with full shielding effect, via self-implantation of palladium nanopanciles. Palladium (Pd) nanopanciles were in-situ immobilized within native & cationized cotton using two different concentrations of palladium precursor (20 & 60 mM) under strong acidic (pH 2) and basic (pH 11.5) media. Cationization (50% and 100%) of cotton fabrics was performed in order to increase the accessibility of fabric for controllable implantation of palladium nanopanciles. Size distribution of palladium nanopanciles in supernatant solution was estimated via Transmission electron microscopy to be 3.2 nm. The estimated data showed that the sample prepared with the highest cationization percent and highest concentration of palladium precursor in strong alkaline medium exhibited the highest yellowness index, color strength and excellent ultraviolet shielding effects. The yellowness index was significantly incr...
Moringa oleifera leaf extract (ME) has been developed as an ecofriendly antibacterial agent for f... more Moringa oleifera leaf extract (ME) has been developed as an ecofriendly antibacterial agent for fabrics made from cotton or its modified forms, carboxymethyl cellulose and cationic cotton. In addition, we prepared silver nanoparticles (AgNPs) with particle size ranged from 15-25 nm by using polyvinyl alcohol and glucose as reducing agent matrix to improve the antibacterial activity of cellulosic fabric finished with Moringa extract. The prepared silver nanoparticles were characterized by using UV-Vis spectra, Transmission electron microscopy and X-ray diffraction. Scanning electron microscopy was used to characterize the morphology of finished fabric surface. The mechanical properties of the finished fabric was evaluated. Also, the antibacterial activity of finished fabric was evaluated via both disk diffusion method on an agar plate and bacterial count colony method (bacterial reduction percent). The Moringa extract and silver nanoparticles finished fabric showed excellent antibacterial activity against S. aureus as Grampositive bacteria and E. coli as Gram-negative bacteria so that they can be used as biocompatible and safe antibacterial finishing agent for cellulosic fabric.
This is a PDF file of an article that has undergone enhancements after acceptance, such as the ad... more This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.
Industrial & Engineering Chemistry Research, 2019
Herein, antibacterial activity and water repellent cotton fabrics with UV protection were carried... more Herein, antibacterial activity and water repellent cotton fabrics with UV protection were carried out through in situ chemical deposition of SiO 2 nanosols. Ammonium hydroxide was used as a gentile catalyst to initiate the polycondensation reaction inside the fabrics. During deposition of SiO 2 nanosols onto cellulose of cotton, the process was integrated with TiO 2 nanosols to evaluate the cooperative properties of the formed SiO 2 /TiO 2 nanosols onto cotton fabrics. Furthermore, the water repellent property was induced to the loaded cotton fabrics by further polycondensation with octamethyltrisiloxane (OMTS). Results revealed that, both SiO 2 and TiO 2 as well as mixtures therefrom were in situ deposited onto cotton fabrics, separately, in size ranging from 5-10nm as indicated from TEM. Results from XRD and FTIR clearly proved, respectively, the crystallographic profile and chemical structure of nanosols loaded inside
Herein we present a novel approach for synthesis, characterization and application of a benign hy... more Herein we present a novel approach for synthesis, characterization and application of a benign hyperbranched polyester amide-silver nanohybrid (Ag/HBPEA). The Ag/HBPEA is developed through three distinct steps. The first step involves amidation reaction of diethanol amine and maleic anhydride to yield AB2 monomer (adduct 1). The second step comprises reaction of adduct 1 with trimethylol propane in presence of catalyst to yield HBPEA. The third step entails reduction of silver nitrate by sodium borohydride reductant to effect in situ formation of AgNPs which are stabilized by HBPEA, leading ultimately to Ag/HBPEA nanohybrid. Both Ag/ HBPEA nanohybrid and HBPEA are independently applied to cotton fabrics as per the conventional paddry-cure technique. To this end, through investigations into the structures of Ag/HBPEA nanohybrid and HBPEA stabilizer before and after application to cotton fabric using advanced techniques emphasize the Ag/HBPEA nanohybrid as multifunctional finishing agent rather than a super antibacterial activity of the cotton fabrics after treatment with Ag/ HBPEA nanohybrid speaks of this. Current research generally addresses green chemistry because treatments involved therein are based on green basics and practices.
IMPROVEMENT of physical properties in an addition to imparting antimicrobial properties to cotton... more IMPROVEMENT of physical properties in an addition to imparting antimicrobial properties to cotton fabric and modified cotton fabric by using herbal in the presence of softeners is the target of the present work, first of all modification of cotton fabric was done during cationization process by the means of cationized agent, namely, 3-chloro-2-hydroxypropyl trimethyl ammonium chloride (Quat-188); also, cotton fabric was modified during carboxymethylation process of it. Then treatments of cotton and modified cotton fabrics were carried out by different concentration of both Neem and Tulsi Extract as essential oil in the presence of Silicon Micro Emulsion (SiME) or Nonionic softeners for improving the performance of the treated fabric. Physical properties evaluations of the treated fabric were done by monitoring tensile strength, elongation, roughness, water absorbency (wettability). Finally, the treated fabrics were evaluated as antimicrobial and characterized by the mean of Scanning Electron Microscope (SEM).
ω-Hydroxy functionalized poly(vinylidene fluoride) prepared in a water-based non-fluorinated solv... more ω-Hydroxy functionalized poly(vinylidene fluoride) prepared in a water-based non-fluorinated solvent by iodine transfer copolymerization VDF and 1234yf.
Systematic application of topical drugs has been widely prescribed as an effective treatment for ... more Systematic application of topical drugs has been widely prescribed as an effective treatment for skin disorders. However, the widespread use of such topical drugs is also associated with emergence of resistant strains of microorganisms resulting in patients resist for one or more antibiotics. Nicotinamide, a water-soluble amide of nicotinic acid and a common topical drug, is approved as anti-acne drug with anti-inflammatory potentials. Encapsulation of nicotinamide into electrospun water-soluble matrix that chemically crosslinked is the approach to control its release. In this research, biocompatible nano-fibrous mat was developed with hydroxyethyl cellulose (HEC) blended with poly(vinyl alcohol) (PVA) by electro-spinning technique. The concentration of HEC (5% w/v) with PVA (10% w/v) was optimized, blended in different ratios (20-50% HEC concentration) and electro-spun to get smooth nano-fibers. Nicotinamide was successfully encapsulated in the electro-spun fibers. Nicotinamide release was controlled via chemical cross-linking of the produced mat. Selected parameters of spinning solutions (viscosity and conductivity) and process parameters (applied voltage and needle-to-collector distance) were studied. The microstructure, morphology of blended HEC/PVA, nicotinamide-loaded nano-fiber, cross-linked HEC/PVA nano-fibrous scaffolds were characterized by scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FTIR). SEM images showed that the mean diameters of blend nanofibers were ranged from 80 to 60 nm. The release profile of the nicotinamide was demonstrated. Release profile of the uncrosslinked and crosslinked mats were demonstred. Immortalized human skin fibroblasts cells were used to examine the biocompatibility of the produced HEC/PVA/ nicotinamide electrospun mats.
Innovative starch-based polymeric products were synthesized for utilization as sizing agents, flo... more Innovative starch-based polymeric products were synthesized for utilization as sizing agents, flocculants, and finishing agents. The synthesis involved reaction of starch and hydrolyzed starches with monochlorotriazinyl-β-cyclodextrin (MCT-β-CD) to yield starch grafted with ...
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