Study on UV Characteristics of Chitosan Schiff Base

Phenylacetaldehyde grafted chitosan,2,4-dichlorobenzaldehyde grafted chitosan,chitosan grafted by vanillin were synthesized from lively C2 amino of chitosan via grafting phenylacetaldehyde,2,4-dichlorobenzaldehyde,vanillin,respectively.The UV properties of three products in dilute methanoic acid solution were discussed.Results showed that all the products had UV absorption in UV-B(280 ~ 320 nm) region.In particularly,Chitosan grafted by vanillin had maximum absorption.It could not only cover the UV-B regain,but also be extended to UV-A( 320nm) regain.As the result,it was a very good anti-UV agent.