Abstract
A novel UV absorbent,(3-hydroxy-4-benzoyl)phenyl 2,3;4,6-di-O-cyclohexylidene-D-β-mannopyranoside(UV-O-DHM),was synthesized using 2,4-dihydroxy-benzophenone(UV-O) and D-mannose as raw materials.The compound exhibited high decomposition temperature(Td) at 372.6 ℃ and possessed good thermal stability.The biodegradable anti-UV polylactic acid(PLA) superfine fibrous membranes were prepared via electro-spinning through mixing UV-O-DHM into dichloromethane solution of PLA,and the features of the fiber were clearly characterized by scanning electron microscope.The fiber has uniform diameter of 3~4 μm and is evenly covered by the nano-porous.The UV-O-DHM/PLA superfine fiber has good ultraviolet absorption performance.With increasing concentration of UV-O-DHM,UV transmittance(T%) decreased,and when the mass fraction of UV-O-DHM was 1.1%,T% was almost 0 in 230~350 nm,and the UV protection level was better than that of UV-O/PLA superfine fiber in 365~380 nm.
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