Effect of phthaloylation on radical-scavenging and moisture-preserving activities of polysaccharide from Enteromorpha linza

In this study, phthaloyl polysaccharide from Enteromorpha linza (PHEP) has been prepared in a homogeneous process by using 1,2-benzenedicarboxylic anhydride and 4-Dimethylaminopyridine as phthaloyl agent and catalyst, respectively. And then the radical-scavenging and moisture-preserving activities of the samples were investigated. The results of chemical composition and FT-IR analysis showed the phthaloyl modifications of polysaccharide were successful. And moreover, the derivative PHEP showed excellent radical-scavenging and moisture-preserving activities, so this derivative needs to be attention and studied in further.