以聚偏氟乙烯(PVDF)/N,N-二甲基乙酰胺(DMAc)/辛醇/水为制膜体系,采用粗糙基底辅助相转化法制备PVDF多孔膜.考察了环境相对湿度对膜结构、透过性能和表面浸润性的影响.结果表明,环境相对湿度增大,膜表面孔数量增多,膜底面聚合物球晶生长更为充分,表面侧致密皮层减薄,在高湿度环境下,成为几乎对称的海绵状断面结构;当环境相对湿度低于50％时,膜的气通量几乎为0,相对湿度高于50％条件下,膜的气通量随相对湿度增大而增大;膜底面的疏水性随相对湿度的增大变化不甚明显,水接触角均在130°以上.
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