Coloration of woven glass fabric using biosynthesized silver nanoparticles from Fraxinus excelsior tree flower

Recent advancement in the fabrication and characterization of natural fiber reinforced composite: A review

The structures and components pressed into marine service are exposed to high stresses and impact forces such as wind, wave, and tidal energy. Additionally, they encounter aggressive environmental ...

Metals to polymer composites for submerged hull: a paradigm shift

A bio-based approach to simultaneously improve flame retardancy, thermal stability and mechanical properties of nano-silica filled jute/thermoplastic starch composite

In this study, a chitosan-based bioflame retardant additive (referred to as NCS) was prepared by chemically altering CS with silicon dioxide (SiO2) via an ion interchange reaction. The effect of NCS on the thermal stability and mechanical properties of vinyl ester/bamboo fiber (VE/BF) composites was studied. The composites were manufactured by a vacuum-assisted resin transfer molding (VARTM) process. Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy and X-ray diffraction analysis were used to characterize the NCS. The spectral results revealed a new peak at 1560 cm−1 corresponding to NH3+–−O Si, indicative of bond between CS and SiO2. The SEM, and XRD results showed a diverse morphology (coarse surfaces) and a significant decrease in the intensity of the diffraction patterns, respectively, which further supported the formation of NCS. The heat release rate (HRR) of NCS was observed to decrease significantly by 76%, and the residual char content increased by 47% compared with CS. The flame retardant and thermal behavior of the NCS-VE/BF composites were examined by UL-94 standards, microcalorimetry, and cone calorimetry and thermogravimetric analysis (TGA). The results showed a 32% delay in burning time, a 14% enhancement in the limiting oxygen index (LOI), and an 18% decrease in the peak heat release rate (pHRR) and total heat release rate (THR) after incorporation of NCS in the VE/BF composites. The addition of NCS into the VE/BF composites also resulted in improved the mechanical properties of the composites, including the tensile, flexural and impact properties. Overall, the synthesized NCS proved to be suitable for the fabrication of sustainable flame-retardant natural fiber (NF) composites suitable for substructural parts in engineering applications without deterioration of mechanical properties.

Effect of a synthesized chitosan flame retardant on the flammability, thermal properties, and mechanical properties of vinyl ester/bamboo nonwoven fiber composites

P. Muhila Ramanan

Papers

Mechanical behaviour of sisal palm glass fiber reinforced composite with addition of nano silica