The potential chemical utility of Soya bean oil for the preparation of novel biodegradable polymeric pressure sensitive adhesive has been investigated. Epoxy resin was prepared through in situ epoxidation of Soya bean oil under controlled reaction conditions. Acrylated epoxidised triglyceride resin (AET resin) and copolymer of AET resin with butyl methacrylate were prepared and evaluated. Higher the concentration of butyl methacrylate higher is the degree of copolymerization of AET resin with butyl methacrylate. An optimum concentration of AET resin with butyl methacrylate (100 : 0.40) yields favourable shear holding time and peel strength to qualify as pressure sensitive adhesive. The candidate PSA formulation is biodegradable with antimicrobial activity against gram positive S. aureus ATCC 25923.

A facile green synthesis of silver nanoparticles has been developed using ascorbic acid and gum acacia as reducing agent and stabilizing agent, respectively. The present work is mainly concerned with understanding the role of reducing and stabilizing agents in the growth of silver nanoparticles. Silver nanoparticles fabricated by using ascorbic acid in a gum acacia solution show faster growth rate and exhibit a rod- and thread-like structure with an average diameter of 40–54 nm, while silver nanoparticles prepared using gum acacia as both reducing and stabilizing agent show slower growth rate, having a pseudo-spherical shape with an average diameter of 11–15 nm. The rod- and thread-structured nanoparticles exhibit a surface plasmon resonance band at 645 nm, while the pseudo-spherically shaped particles show absorbance at 424 nm. The silver nanoparticles showed a face-centered cubic crystal system as predicted from the X-ray diffraction pattern. The impact of structural variation on the catalytic properties of silver nanoparticles was also demonstrated in this work. The catalytic activity of silver nanoparticles fabricated by using the green approach was demonstrated by using methylene blue dye. The pseudo-spherical silver nanoparticles exhibit greater catalytic activity as compared to the rod- and thread-shaped silver nanoparticles.

Nanoparticles have made a steady progress in all the branches of science. It is used in biological applications including nanomedicine. Zinc oxide is also known as Zincite generally seen in a crystalline form. Zinc oxide nanoparticles are multifunctional. It has effective antibacterial activity. This study focuses on the synthesis of zinc oxide nanoparticle by the sonochemical and green method, characterized by XRD, SEM and to determine the antibacterial efficacy of green and chemical techniques.Results prove that green synthesized Zinc oxide nanoparticle shows the enhanced biocidal activity. In addition the current study has demonstrated that the particle size variation and surface area to volume ratio of green synthesized Zinc oxide nanoparticles are responsible for significant high antibacterial activity. From the result obtained it suggested that the biogenic green fabrication is a better choice due to eco-friendliness.

Polyurethane thin film was synthesised from soyabean oil, ethylene glycol, 30% hydrogen peroxide and isophorone diisocyanate by stepwise polymerisation technique. The biodegradability of the polyurethane film was studied by soil burial test .The chemical resistance of the polyurethane was analysed with different solvents. The polyurethane thin film was characterised with respect to their mechanical properties such as hardness, tensile strength, percentage elongation and young’s modulus. These studies revealed that the rigid polyurethane possess good tensile strength and biodegradability. The exothermic and endothermic nature of the polymer showed that the polyurethane was thermally stable. The physical properties such as acid value, saponification value, epoxy value, viscosity and hydroxyl values calculated. The FTIR and NMR spectral studies carried out to identify the nature of the polymer formed. Sem analysis confirmed that the polymer was biodegradable in nature. The shore hardness of the thin film was measured with the help of durometer. The tensile strength increases with increase in concentration. The young’s modulus of the thin film was calculated from the tensile strength analysis. The elasticity of the thin film was also measured by using tensile strength measurement. The swelling parameters were studied with polar and organic solvents. The thermal degradation at different time intervals were analysed by TG-DTA analysis.

Herein, we report for the first time, the synthesis of silver nanoparticles-nitrogen doped graphene oxide-chitosan nanocomposite (SGC) from the aqueous leaf extract of Curcuma caesia plant and we explored bacterial toxicology behavior of SGC nanocomposite via agar disc diffusion method. Curcuma caesia is a medicinal herb utilized as a reducing agent for the reduction of silver-to-silver ions. Graphene oxide is a significant two-dimensional carbon nanomaterial, possessing excellent physical, chemical, and electrical properties that make them unique for various applications. The Ultrasonication process at room temperature was utilized for the synthesis of SGC nanocomposite. The addition of biopolymer; chitosan, and silver nanoparticles (AgNPs) to the matrix of nitrogen-doped graphene oxide (NGO) was confirmed via various spectroscopic techniques such as FTIR, FT-Raman, XPS, and so on. Finally, the results of the disc diffusion method showed SGC nanocomposite exhibit concentration-dependent inhibition toward bacterial growth.