采用相转化法制备了具有特殊微球结构的高通量聚醚砜(PES)平板膜,以N,N-二甲基乙酰胺(DMAC)为溶剂,聚环氧乙烷(PEO)与聚乙二醇(PEG)分别作为固体添加剂和液体添加剂,系统研究了PES聚合物含量、固态添加剂含量和液态添加剂浓度等关键参数对膜材料微观形貌及性能的影响。结果表明:通过优化铸膜液组成配比,可诱导形成具有独特微球堆砌结构的PES多孔膜。可为开发具有特殊表面形貌的分离膜材料提供理论依据,在生物分子分离领域展现出潜在应用价值。

High-flux polyethersulfone (PES) flat-sheet membranes with a unique microsphere structure were fabricated via the phase inversion method using N,N-dimethylacetamide (DMAC) as the solvent,poly(ethylene oxide)(PEO) as a solid additive,and poly(ethylene glycol)(PEG) as a liquid additive.The effects of key parameters including PES polymer concentration,solid additive content,and liquid additive concentration on the membrane microstructure and performance were systematically investigated.Experimental results demonstrated that optimizing the composition ratio of the casting solution could induce the formation of PES porous membranes with distinctive microsphere-stacked structures.This study provides theoretical guidance for developing separation membranes with specialized surface morphologies,presenting potential application value in the field of biomolecular separation.