Influence of the Surfactants on Microstructure and the Properties of Wet Coagulation Polyurethane Film.  

作　　者：曾跃民 严灏景 胡金莲 

出　　处：《Journal of Donghua University(English Edition)》2002年第2期15-18,共4页东华大学学报（英文版）

基　　金：TheHongKongPolytechnicUniversity (A .14 .37.PB5 3)

摘　　要：Polyurethane asymmetric membranes were prepared by wet coagulation process from the PU/DMF/Span80/ OT70 solutions, and the morphological features of the cross section of the membranes obtained by scanning electron microscopy were presented. The influences of the non-ionic hydrophobic surfactant Span80 and the anionic surfactant hydrophilic OT-70 on the morphology of the membranes, the mechanical properties and the water vapor permeability were studied. The formation mechanism of the membrane microstructure from the different PU/DMF/Surfactants systems was discussed.Polyurethane asymmetric membranes were prepared by wet coagulation process from the PU/DMF/Span80/ OT70 solutions, and the morphological features of the cross section of the membranes obtained by scanning electron microscopy were presented. The influences of the non-ionic hydrophobic surfactant Span80 and the anionic surfactant hydrophilic OT-70 on the morphology of the membranes, the mechanical properties and the water vapor permeability were studied. The formation mechanism of the membrane microstructure from the different PU/DMF/Surfactants systems was discussed.

关 键 词：MEMBRANE formation  polyurethane  macrovoid spinodal decomposition 

分 类 号：N[自然科学总论]