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在PES/SiO2体系中添加PEG,采用相转化法制备了PES杂化膜,测定了PES杂化体系铸膜液的热力学相图、成膜动力学及膜性能。结果表明:与纯PES体系相比,PES/SiO2及在PES/SiO2中添加亲水性的PEG后,PES铸膜液杂化体系的分相曲线均不同程度的向聚合物/溶剂轴移动,分相时所需的凝固浴用量较少,PES体系的成膜速度有所提高。膜断面的SEM照片表明,PES/SiO2/PEG杂化膜具有更大的指状孔及表面微孔。该系列PES杂化膜的水通量和截留率均有不同程度的提高。
PES / SiO2 system was added with PEG, and PES hybrid membrane was prepared by phase inversion method. The thermodynamic phase diagram, film formation kinetics and membrane performance of PES hybrid system were measured. The results showed that the phase separation curves of PES cast films hybridized to polymer / solvent axis to some extent when PES / SiO2 and PES / SiO2 were added with hydrophilic PEG compared with pure PES. The coagulation bath required for phase separation is less used, and the deposition rate of the PES system is increased. The SEM images of the film cross sections show that the PES / SiO2 / PEG hybrid films have larger finger-like pores and superficial pores. This series of PES hybrid membrane water flux and retention rates have varying degrees of improvement.