Synthesis of a fully biobased cellulose-3-(2-hydroxyphenyl) propionate ester with antioxidant activity and UV-resistant properties by the DBU/CO2/DMSO solvent system

A novel fully biobased cellulose-3-(2-hydroxyphenyl) propionate ester with satisfactory antioxidant activity and UV-resistant properties was first prepared using cellulose and 3,4-dihydrocoumarin (DHC) in a DMSO/DBU/CO₂ solvent system without adding any external catalyst.