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以聚砜(PSF)和聚氨酯(PU)为膜材料,PEG400为添加剂,N、N-二甲基乙酰胺(DMAc)为溶剂,纯水凝胶,采用相转化法制备了PSF/PU共混超滤膜。用溶解度参数预测和粘度法表征了PSF/PU是部分相容体系。系统的研究了共混比、聚合物浓度、添加剂含量和挥发时间等制膜条件对膜分离性能的影响,结果表明,聚合物总浓度为16%,共混比(mPSF/mPU)为80/20,PEG400含量为6%,挥发时间为40s时,所制备的共混超滤膜分离性能较好,其水通量达到86.48L/(m2·h),对聚乙二醇10000的截留率为85%。与PSF膜相比,共混膜的接触角从90.17°下降到67.7°,亲水性提高;角蛋白吸附量由138.12μg/cm2下降为82.06μg/cm2,抗污染性提高。
PSF and PU were used as membrane materials, PEG400 as additive and N, N-dimethylacetamide (DMAc) as solvent and pure hydrogel. PSF / PU blends were prepared by phase inversion method UF membrane. PSF / PU is partially compatibilized with the prediction of solubility parameter and viscosity method. The effects of filming conditions, such as blending ratio, polymer concentration, additive content and volatilization time, on membrane separation performance were systematically studied. The results showed that the total polymer concentration was 16% and the blend ratio (mPSF / mPU) 20, PEG400 content of 6%, volatilization time of 40s, the prepared ultrafiltration membrane separation performance is good, the water flux reached 86.48L / (m2 · h), the polyethylene glycol 10000 retention 85%. Compared with PSF membrane, the contact angle of blend membrane decreased from 90.17 ° to 67.7 °, and the hydrophilicity increased. The amount of keratin adsorbed decreased from 138.12μg / cm2 to 82.06μg / cm2, and the antifouling property increased.