Effect of Bath Concentration during Electrophoretic Deposition on the Interfacial Behaviour of Hybrid CFRP Composites

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 CFRP composites have shown better ILSS properties. This research primarily aims to fabricate a CFRP composite using G-COOH modified carbon fibres with varying nanofiller concentrations of 0.5g/ltr, 1g/ltr and 1.5g/ltr in the EPD bath and its impact on the mechanical properties of the FRP composites. The laminates thus obtained were subjected to short beam shear test for the determination of inter laminar shear strength (ILSS). Fractography of the tested samples to observe various failure modes has been carried out by using scanning electron microscope (SEM).

Concept Evaluation of Predicting UPF Values for Artificial Cellulose Fabrics by Varying the Optical Brightener Chemical Structure Applied

The publication presents investigation results and statistical analysis showing that by varying the chemical structure of optical brighteners from the derivative group of stilbene used for fabrics of artificial cellulose fibre modification, resulting in a different manufacturing process, it is possible to predict the level of the UPF value of the index of such modified fabric. In addition, statistically it was confirmed by results from early research that both the fibre finish (in this case, roughening the pigment TiO2 ) used for fabric manufacture as well as the FBA concentration used for fabric modification influence their UPF index value. Fabric UV -barrier studies also showed that despite a partial decrease in UPF values for such finished fabrics, the dependence of such an index on subtle differences in the chemical structure of the FBAs is maintained. Primarily the possibility and range of improving textile barriers against UV radiation through the use of the UV-absorption abilities of optical brighteners with subtle differences in their chemical structure was recognised, creating a premise to elaborate a mathematical control concept to steer a textile UV-barrier.

Surface Modification of Sisal Fibres by Ultrasonic Field

This article demonstrates the surface modification of sisal fibres by using NaOH in an ultrasonic medium. The fibres were soaked in 1.0 M NaOH, 60°C for 30, 60, and 90 min, respectively. The fibre surface was examined with a digital microscope camera and a scanning electron microscope (SEM). An elasticity test was used to examine the mechanical properties of composites, specifically between sisal and LLDPE. The results demonstrated the modification of the sisal fibres in NaOH solution by ultrasound producing a cleaner and smoother fibre surface. This was affected by a cavitation phenomenon, which produced high-speed impact jets that cleaned off the dirty particles from the fibre surface. The modified mixed materials had higher ultimate tensile strength. By using this method, the result of sisal fibre modification decreased in the diameter strand of the experimented fibres.

Preparation and adsorption behaviour of cationic nanoparticles for sugarcane fibre modification

Cationic nanoparticles with a core–shell structure and high zeta potential were prepared by two-step semi-batch emulsion polymerization and pre-emulsification technology using the cationic emulsifier hexadecyl trimethyl ammonium chloride (CTAC).