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1种制备含氟聚合物微孔膜的环境友好型的工艺方法。该工艺方法过程包括含氟聚合物与稀释剂混合,稀释剂为柠檬酸酯类、对苯偏苯类和多元醇二苯甲酸酯类中的1种或2种以上的混合物;加热溶解,脱泡形成均一铸膜液;采用自然冷却或凝胶浴的方式加工固化成型;用萃取剂萃取出膜孔中的稀释剂得到含氟聚合物微孔膜;形成的萃取剂/稀释剂混合物通过精馏分离回收。与现有技术相比:该发明应用热致相分离原理,制备出断面为均匀的双连续孔结构,皮层结构可
An environmentally friendly process for preparing fluoropolymer microporous membranes. The process comprises the following steps: mixing a fluoropolymer with a diluent, wherein the diluent is a mixture of one or two or more of citric acid esters, p-phenylenebenzenes and polyhydric alcohol dibenzoates; heating and dissolving, So as to form a uniform cast film liquid; processing and solidifying by a method of natural cooling or a gel bath; extracting a diluent in the film hole with an extractant to obtain a fluoropolymer microporous film; and forming the extractant / diluent mixture by fine Distillate separation and recovery. Compared with the prior art, the invention uses the principle of thermally induced phase separation to prepare a bicontinuous pore structure with uniform cross section, and the cortical structure can be