Carbon fibre reinforced polymer (CFRP) composites a perfect structural material due to their outs... more Carbon fibre reinforced polymer (CFRP) composites a perfect structural material due to their outstanding malleable strength, great rigidity, light mass and pronounced thermal resistance. But their inferior out-of-plane properties which are controlled by the matrix–fibre interface restrict the use of CFRP composites in critical applications. Amalgamation of nanofiller in the CFRP composites has found to improve the matrix-fibre interface and there by out-of-plane response. Though matrix modification has contributed to the improvement of interface, fibre modification has a scope for higher levels of nanofiller incorporation and proper fibre nanofiller adhesion. Out of several methods available for fibre modification electrophoretic deposition (EPD) is an eye-catching method for monitoring as well for nanofiller deposition. In recent ages, Graphene has grabbed wonderful consideration Among the graphene based functionalised nanofillers Carboxyl functionalized Graphene (G-COOH) modified ...
Carbon fiber (CF) modification by grafting of various graphene-based nanofillers (GBN) by electro... more Carbon fiber (CF) modification by grafting of various graphene-based nanofillers (GBN) by electrophoretic deposition (EPD) technique was proven to be a successful technique to enhance the out-of-plane performance of carbon fiber reinforced polymer (CFRP) composites. Graphene carboxyl (G-COOH) grafting on carbon fiber by electrophoretic deposition (EPD) is a promising technique to improve the mechanical properties of CFRP composites. To our knowledge, there is a dearth of literature available on the effect of EPD process parameters on the mechanical behavior of modified CFRP composites. The aim of this study is to evaluate the effect of nanofiller concentration in the suspension, applied current, and the time of deposition during EPD on the mechanical behavior of nanophase CFRP composites, thus making it a novel work. With increasing concentration, interlaminar shear strength (ILSS) improved consistently and has shown a maximum enhancement of 24.7% than that of neat CFRP composite at 1.5 g/L nanofiller concentration, whereas flexural strength remained almost unaffected with varying concentration. On the contrary, variation of deposition current has affected the flexural strength but not ILSS. The maximum flexural strength was obtained at a deposition current of 5.0A with an improvement of 16.3% in comparison with neat CFRP samples. However, both flexural strength and ILSS of hybrid CFRP composites have shown improvement with increasing deposition time. At 60 min of deposition, ILSS and flexural strength have shown maximum improvements of 35.0 and 26.6%, respectively, when compared to control specimen. After evaluating the effect of process parameters future scope of the work involves the optimization of parameters for EPD of G-COOH. Fractographic analysis of the fractured samples was performed using scanning electron microscope (SEM) to apprehend prominent failure mechanisms.
Composites Part A: Applied Science and Manufacturing, 2019
Decoration of the Carbon fiber (CF) surface using graphene based nano-fillers (GBN) by the electr... more Decoration of the Carbon fiber (CF) surface using graphene based nano-fillers (GBN) by the electrophoretic deposition (EPD) is possibly one of the most emerging techniques for the enhancement of the mechanical response of carbon fiber reinforced polymer (CFRP) composites. Present investigation is focused on enhancing the flexural and interlaminar properties of a CFRP composite by surface modification of carbon fiber by EPD technique using GBN (graphene (G), graphene oxide (G-O), graphene hydroxyl (G-OH) and graphene carboxyl (G-COOH)). The highest flexural strength and interlaminar shear strength was obtained for the G-COOH modified CFRP composite, which are 9.6% and 22.9% higher than that of control CFRP respectively. Dynamic mechanical thermal analysis (DMTA) was conducted in the temperature range of 30ºC to 180ºC to understand the temperature dependent mechanical behavior of all the composites. In addition, fractographic analysis was carried out using scanning electron microscopy (SEM) to understand various failure micromechanisms.
Carbon fibre reinforced polymer (CFRP) composites a perfect structural material due to their outs... more Carbon fibre reinforced polymer (CFRP) composites a perfect structural material due to their outstanding malleable strength, great rigidity, light mass and pronounced thermal resistance. But their inferior out-of-plane properties which are controlled by the matrix–fibre interface restrict the use of CFRP composites in critical applications. Amalgamation of nanofiller in the CFRP composites has found to improve the matrix-fibre interface and there by out-of-plane response. Though matrix modification has contributed to the improvement of interface, fibre modification has a scope for higher levels of nanofiller incorporation and proper fibre nanofiller adhesion. Out of several methods available for fibre modification electrophoretic deposition (EPD) is an eye-catching method for monitoring as well for nanofiller deposition. In recent ages, Graphene has grabbed wonderful consideration Among the graphene based functionalised nanofillers Carboxyl functionalized Graphene (G-COOH) modified ...
Carbon fiber (CF) modification by grafting of various graphene-based nanofillers (GBN) by electro... more Carbon fiber (CF) modification by grafting of various graphene-based nanofillers (GBN) by electrophoretic deposition (EPD) technique was proven to be a successful technique to enhance the out-of-plane performance of carbon fiber reinforced polymer (CFRP) composites. Graphene carboxyl (G-COOH) grafting on carbon fiber by electrophoretic deposition (EPD) is a promising technique to improve the mechanical properties of CFRP composites. To our knowledge, there is a dearth of literature available on the effect of EPD process parameters on the mechanical behavior of modified CFRP composites. The aim of this study is to evaluate the effect of nanofiller concentration in the suspension, applied current, and the time of deposition during EPD on the mechanical behavior of nanophase CFRP composites, thus making it a novel work. With increasing concentration, interlaminar shear strength (ILSS) improved consistently and has shown a maximum enhancement of 24.7% than that of neat CFRP composite at 1.5 g/L nanofiller concentration, whereas flexural strength remained almost unaffected with varying concentration. On the contrary, variation of deposition current has affected the flexural strength but not ILSS. The maximum flexural strength was obtained at a deposition current of 5.0A with an improvement of 16.3% in comparison with neat CFRP samples. However, both flexural strength and ILSS of hybrid CFRP composites have shown improvement with increasing deposition time. At 60 min of deposition, ILSS and flexural strength have shown maximum improvements of 35.0 and 26.6%, respectively, when compared to control specimen. After evaluating the effect of process parameters future scope of the work involves the optimization of parameters for EPD of G-COOH. Fractographic analysis of the fractured samples was performed using scanning electron microscope (SEM) to apprehend prominent failure mechanisms.
Composites Part A: Applied Science and Manufacturing, 2019
Decoration of the Carbon fiber (CF) surface using graphene based nano-fillers (GBN) by the electr... more Decoration of the Carbon fiber (CF) surface using graphene based nano-fillers (GBN) by the electrophoretic deposition (EPD) is possibly one of the most emerging techniques for the enhancement of the mechanical response of carbon fiber reinforced polymer (CFRP) composites. Present investigation is focused on enhancing the flexural and interlaminar properties of a CFRP composite by surface modification of carbon fiber by EPD technique using GBN (graphene (G), graphene oxide (G-O), graphene hydroxyl (G-OH) and graphene carboxyl (G-COOH)). The highest flexural strength and interlaminar shear strength was obtained for the G-COOH modified CFRP composite, which are 9.6% and 22.9% higher than that of control CFRP respectively. Dynamic mechanical thermal analysis (DMTA) was conducted in the temperature range of 30ºC to 180ºC to understand the temperature dependent mechanical behavior of all the composites. In addition, fractographic analysis was carried out using scanning electron microscopy (SEM) to understand various failure micromechanisms.
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Papers by Sagar Yandrapu