The effect of structure pervaporation of chitosan membrane

摘要

The impact of fabrication conditions on the chitosan (CS) membrane structure and its pervaporation (PV) performance are studied in this paper, Chitosan homogeneous membranes were fabricated by casting a chitosan/acetic acid solution, then heating it at various temperatures and for different periods of post-heating time, followed by chemically cross-linking with H_2SO_4. The PV separation tests using the resulting membranes demonstrate that the chitosan membranes are capable of Separating water-ethanol mixtures. The optimized conditions for chemical cross-linking of membranes were found to be 0.5 M of the cross-linking reagent (H_2SO_4 and 10 min reaction time at ambient temperature. The preparation temperature of chitosan membranes is the key factor to PV performance of separating water-ethanol.