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在PVDF/PMMA/TPU铸膜液中添加SiO2,采用相转化法制备有机/无机共混五孔膜,并经接触角实验、扫描电子显微镜、超滤实验和拉伸实验分别对不同SiO2添加量下膜的亲水性能、微观结构、超滤性能和机械性能进行了分析。结果表明,当SiO2添加量为0.5%时,膜的亲水性较好,结构形态也有所改善,此时纯水通量为164.8 L/(h.m2),同时截留率可达76.8%,膜的拉伸性能也有所提高;但是SiO2含量过高的情况下,膜的各项性能指标会因SiO2颗粒的团聚现象而下降。
SiO2 was added into PVDF / PMMA / TPU casting solution to prepare organic / inorganic blend five-hole membrane by phase inversion method. The effects of different SiO2 addition amount Under the hydrophilic membrane properties, microstructure, ultrafiltration performance and mechanical properties were analyzed. The results showed that when the content of SiO2 is 0.5%, the hydrophilicity of the membrane is better and its structure is also improved. At this time, the pure water flux is 164.8 L / (h.m2) and the rejection rate is up to 76.8% Tensile properties of the film also increased; but the SiO2 content is too high, the performance of the film due to SiO2 particles agglomeration phenomenon decreased.