The chitosan membrane and crosslineked were prepared by doctor-blade casting process with chitosan. The chitosan solution concentration as well as temperature capacity of glutaraldehyde crosslinked chitosan membranes have been studied. The best experimental conditions of cross-linking of chitosan film have been obtained as follows: the concentration of chitosan solution is 1%, cross linking temperature would be exceeded 70 ℃,  cross linking time must be exceeded 1 h, and to obtain the better film, the dry way would be the nature air dries or drying on the 80 ℃. The results show that chitosan membrane has the highest intensity of 9.92 MPa, the maximum ratio of  resistant elongation is 11.75%, and the film has not the acid resistance. Though the cross-linked chitosan with glutaric the highest intensity of  dialdehyde can achieve the value 96.64 MPa, the maximum ratio of  resistant elongation is 10.92%. The acid resistance of film has been enhanced greatly.

 

Chitosan,    , Cross linking,    ,  Membranes,   , Performance