A novel blend flat-sheet ultrafiltration (UF) membrane was prepared by immersion precipitation phase inversion using polyacrylonitrile (PAN) and polysulfone (PSF) as membrane materials. The relationship between casting solution formula and separation performance of blend UF membranes was analyzed. Experimental results show that the different casting solution formula such as polymer concentration, blending ratio, organic additives and inorganic nanometer had a significant effect on the performance of blend UF membranes. With the increase of polymer concentration, the water flux and porosity of blend UF membrane decreased obviously while the rejection rate showed an upward trend. The separation performance of blend UF membrane exhibited the opposite trend when the proportion of PAN and PSF increased. The water flux of blend UF membrane prepared with 0.04% NaA zeolite was 176.9 L/m²h, which was nearly three times higher than that of the original membrane. The optimum formulation of blend UF membrane is as follows: polymer concentration of 20%, PAN to PSF mass ratio of 8:2, PEG additive content of 0.5%, NaA zeolite content of 0.04%. The novel blend UF membrane exhibits good pressure stability and pollution resistance performance.

以聚丙烯腈（PAN）和聚砜（PSF）为膜材料，通过沉浸相转化法制备了新型共混平板超滤膜。分析了流延溶液配方与混合超滤膜分离性能之间的关系。实验结果表明，不同的流延溶液配方，如聚合物浓度，共混比，有机添加剂和无机纳米对共混超滤膜的性能有显着影响。随着聚合物浓度的增加，共混超滤膜的水通量和孔隙率明显下降，截留率呈上升趋势。当PAN和PSF的比例增加时，混合超滤膜的分离性能呈现相反的趋势。²小时，几乎是原始膜的三倍。共混超滤膜的最佳配方如下：聚合物浓度为20％，PAN与PSF的质量比为8：2，PEG添加剂含量为0.5％，NaA沸石含量为0.04％。新型共混超滤膜具有良好的压力稳定性和抗污染性能。