为了获得具有海绵状结构和精准分离性能的聚醚砜膜,系统地研究了固含量,甘油、聚乙烯吡咯烷酮以及丙酮含量对溶液相转化法下制膜性能的影响机制。结果表明:甘油,聚乙烯吡咯烷酮含量可用于调控膜材料结构,实现海绵状结构分离膜的制备;固含量以及丙酮含量分别影响膜孔致密程度以及分离层的亚稳态,通过改变两者含量可以获得具有不同分离精度的聚醚砜膜。即当聚乙烯吡咯烷酮含量为11.0%～13.0%,甘油含量为5.0%,可以有效地控制海绵状结构;保持聚醚砜16.0%～18.0%的固含量,通过改变铸膜液中丙酮含量可以实现分离膜孔径在10～200nm的精准调节。
The polyethersulfone(PES) membrane with sponge-like structure and precise separation performance was prepared by nonsolvent induce phase separation method,and the effects of solid content,glycerin,polyvinylpyrrolidone and acetone content on membrane performance were systematically studied.The results showed that the content of glycerol and polyvinylpyrrolidone could be used to regulate the membrane structure,and realized the preparation of sponge-like membrane.Solid content and acetone content affected the degree of pore density and the metastability of the separation layer respectively.PES membranes with different separation accuracy could be obtained by changing the content of solid and acetone.Furthermore,when the content of polyvinylpyrrolidone was 11.0%～13.0%,and the content of glycerin was 5.0%,the sponge-like structure could be controlled effectively.When the solid content was 16.0%～18.0%,the pore size of the memebrane could be adjusted precisely at 10～200nm by changing the content of acetone in the casting solution.
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基金资助
广东省基础与应用基础研究基金项目(2020A1515011155);国家重点研发计划(2019YFC1711300);中国科学院科技服务网络计划(STS计划)区域重点项目(KFJ-STS-QYZX-043);中国博士后科学基金面上项目(206890);广州市南沙区科技项目(2017CX012)
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