Influence of coating polyurethane with mixture of bentonite and chitosan nanocomposites

Polyurethanes (PU) is one of the most widespread material in the world. Polyurethanes is an important division of a synthetic polymer that has been used widely included in biomedical applications. Utilization of chitosan for anti-microbial properties of the material is also performed in this study, including testing to comprehend the development of harmful bacteria such as Staphylococcus aureus. Furthermore, the current development of the science of nanotechnology is not only to produce the anti-bacterial material but also able to resist the thermal resistant. Therefore in this study, dispersion of bentonite nanocomposite as a filler material in the matrix as a reinforcement polyurethane to thermal insulation and improved mechanical properties of the coating materials. The results of the analysis of Fourier transform infrared (FTIR) have demonstrated the formation of clusters urethane N-H in the compound polyurethane palm oil, the reaction takes for 6 hours at a temperature of 80°C as evidenced by absorption wave number N-H widening out at 3320 cm-1 and 3480 cm-1. Analysis of X-ray diffraction (X-RD) is an effective method for measuring the crystal structure of pure bentonite and bentonite nanocomposite shows the result of d-spacing pure bentonite was 1.798 nm, pure chitosan was 1.142 nm, bentonite nanoparticles was 2.055 nm, chitosan nanoparticles was 1.571 nm respectively and polyurethane/ bentonite/chitosan (PU/B/CH) nanocomposites were 3.386 nm. This d-spacing larger than that of the pure bentonite and chitosan.