Process for preparing compound polyelectrolyte (chitosan/sodium polyphosphate) membrane

Application Number: 00109129
Application Date: 2000.06.09
Publication Number: 1270078
Publication Date: 2000.10.18
Priority Information:
International: B01D69/06;B01D71/08
Applicant(s) Name: Qinghua Univ.
Inventor(s) Name: Chen Cuixian;Hao Jihua;Zhang Liping
Patent Agency Code: 11201
Patent Agent: luo wenqun
Abstract A process for preparing compound polyelectrolyte membrane includes such steps as adding chitosan to diluted aqueous solution of acetic acid to prepare chitosan membrane liquid, filtering, defoaming, coating said membrane liquid on PAN substrate film, baking to obtain chitosan acetate membrane, immersing it in the aqueous solution of sodium polyphosphate for polyionizing reaction, flushing with water and drying in air. Its preparing process is simple. When said membrane is used to dewater organic substance, it has high penetration throughput and separation coefficient.