Manufacturing of Functional Films Based on Caffeic Acid Derivatives of Succinoglycan (SG) Exopolysaccharides Obtained from Sinorhizobium Meliloti with Biological Functionality and Biodegradability

A caffeic acid modified succinoglycan (Ca-SG) was synthesized based on SG, an exopolysaccharide extracted from soil microorganisms. The structural and physical properties of SG and Ca-SG were elucidated by structural analysis methods such as NMR, FTIR, XRD, and TGA. Additionally, enhanced or newly emerging functions investigated through various physiochemical methods. Based on those characteristics, a biodegradable, multi-functional film was fabricated by inducing film formation of SG and its caffeic acid derivative. Optimal condition of films was selected with the mechanical and rheological measurements. The results confirmed that the films based on SG and caffeic acid derivatives are multifunctional and biodegradable materials, suggesting the potential as an industrial biomaterial in various fields such as food science, cosmetics, and biotechnology using microbial polysaccharide.