In order to solve the insufficient efficacy of photosensitizers in protein fiber applications,an efficient nano-photodynamic antimicrobial agent,CS-RB,is designed by coupling chitosan(CS)and Rose Bengal(RB).Its microstructural and photodynamic properties are studied,and its photodynamic antimicrobial performance after adsorption on fabrics is investigated.The results show that the ability of CS-RB to generate 1O2 is en-hanced by 2.98 times,and the antimicrobial rate against Staphylococcus aureusreaches 99.99％,and the antimi-crobial rate against Escherichia coli is enhanced by 77.52％.The protein fiber loaded with CS-RB achieves 99.99％and 99.90％antimicrobial rates against S.aureusand E.coli,respectively,and has satisfactory wearabili-ty.In addition,CS-RB also exerts good photodynamic antimicrobial efficacy on different substrate fabrics.
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