环境工程学报2012，Vol.6Issue(9)：2985-2990,6.
混合添加剂对PVDF平板疏水膜结构及性能的影响
Effect of mixed additives on structure and performance of PVDF flat sheet hydrophobic membrane
摘要
Abstract
The polyvinylidene fluoride（PVDF） flat hydrophobic membranes based on the support of non-woven fabric with different non-solvent additives were prepared by the immersion phase inversion process and the influence of different additives on structure and performances of flat hydrophobic membranes were investigated by scanning electron microscope（SEM）,atomic force microscope（AFM）,Fourier transform infrared spectroscopy（FTIR）,contact angle goniometer and membrane distillation experiment.The results showed that the membrane with acetone and phosphoric acid as the mixed additive exhibited high permeate and high rejection of inorganic salt,the additives had no obvious influence on the polymer crystallinity of hydrophobic membranes.Besides,the additives also increased the membrane surface roughness and enhanced the hydrophobicity.During the desalination process of 35 g/L sodium chloride solution through direct contact membrane distillation with the self-prepared membrane,a maximum permeate flux 12.45 kg/（m2·h） was obtained and the rejection of NaCl maintained 99.99% with the feed solution at 50℃ and the cold distillate water at 20℃.关键词
聚偏氟乙烯/平板膜/膜蒸馏/膜结构/疏水性Key words
polyvinylidene fluoride/flat sheet membrane/membrane distillation/membrane structure/hy-drophobicity分类
化学化工引用本文复制引用
樊华,张琳,侯得印,王军,纪仲光,闫勇..混合添加剂对PVDF平板疏水膜结构及性能的影响[J].环境工程学报,2012,6(9):2985-2990,6.基金项目
国家自然科学基金资助项目 （）
清华大学固体废物处理与环境安全教育部重点实验室开放基金 （）
环境水质学国家重点实验室人才启动课题 （）
