以聚醚砜(PES)为材料通过水蒸汽辅助法制备蜂窝状多孔膜,利用扫描电镜(SEM)观察膜表面形貌特征.研究溶剂、铸膜液浓度和湿度等因素对形成多孔膜结构的影响,通过控制铸膜液浓度、湿度等因素来控制膜的表面形貌及其所成蜂窝状孔的大小.实验结果表明,高湿度环境和具有一定浓度的聚合物溶液是制备蜂窝状多孔膜的必要条件;溶剂的挥发性是形成规整蜂窝状孔结构的关键因素,形成蜂窝状多孔膜的最佳条件为溶剂CH2Cl2,相对湿度93.5％,铸膜液中PES质量分数为2％,注射量为60 μL.
The ordered honeycomb-patterned polyether sulfone (PES) porous membranes were fabricated by the "Breath figures" (BFs) method,microstructure of the membranes were characterized by SEM.The microstructure of membrane surface and the size of the pore can be controlled by concentration,and humidity and so on.The experimental results show that high humidity and proper polymer concentration are essential to fabricate honeycomb patterned membrane.The key role of forming honeycomb pattern is evaporation of solvent.When the solvent,humidity,concentration,injection are CH2Cl2,93.5％,2％,60μL respectively,honeycomb pattern will be the best.
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