国产精品视频一区二区三区四,亚洲av美洲av综合av,99国内精品久久久久久久,欧美电影一区二区三区电影

文獻名： Preparation of PAN nanofiltration membranes by supercritical-CO2-induced phase separation

 

作者： Haozong Wanga, Jianhui Yua, Hua Baia, Lei Lia, b,

a College of Materials, Xiamen University, Xiamen 361005, People’s Republic of China

b State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai 201620, People’s Republic of China

 

摘要：Nanoporous polyacrylonitrile (PAN) membranes were prepared by a supercritical carbon dioxide induced phase separation method from a solution containing dimethyl formamide as the solvent. The influence of the experiment parameters, including temperatures, pressures and polymer concentrations, on the morphology of the nanoporous membrane were investigated in detail. The porosities of the obtained membranes were characterized by scanning electron microscopy and nitrogen adsorption technique. The PAN membranes demonstrate high pure water flux and high size selectivity, which have promising applications for the nanofiltration.