Synthesis of Castor Oil-Based Polyols Reinforced with Organoclay-Chitosan as Nanocomposite Polyurethane Coatings in The Application of Environmentally Friendly Medical Equipment

In this research, castor oil is used as raw material for making polyols. This review provides an overview of polyurethane coatings for the application of anti-bacterial medical devices. The anti-bacterial properties used in this review are chitosan. Chitosan is an amino polysaccharide that has a great structural tendency to produce bioactive materials with innovative properties and a variety of applications, especially in the biomedical field. To improve the physical and mechanical properties of polyurethane such as heat resistance, modifications were made with the addition of bentonite. This study with a variation of polyurethane/bentonite/chitosan ratio of 2, 3 and 4 (% w / v), as well as tests conducted in the form of FTIR, TGA, and anti-bacterial tests. The results obtained for the best level of thermal stability in polyurethane / bentonite / chitosan 4%: 4% with a temperature of 600.94 °C and remaining weight 7.5 mg, while the anti-bacterial test obtained the largest inhibitory zone in polyurethane/bentonite/chitosan 4%: 4% for Staphylococcus Aureus bacteria at 7.66 mm and Escherichia Coli bacteria at 5.8 mm.