首先探讨了ZnO、Al2O3、TiO2、SiO2四种无机纳米颗粒的加入对PVC/PES共混溶液剪切黏度的影响,在此基础上研究了纳米颗粒的加入对PVC/PES共混膜断面和表面微观结构、水通量、截留率、亲水性、孔隙率、机械性能等的影响.结果表明,四种无机纳米颗粒均使共混膜的表面孔径和孔隙率减小,亲水性和截留率增大.添加无机纳米颗粒的膜,其孔隙率越大,水通量也越大.未添加无机纳米颗粒的PVC/PES共混膜,孔隙率最大,但水通量小于添加SiO2和ZnO后的膜.这一点说明膜的水通量不仅与孔隙率有关,与膜的亲水性也有密切的关系.另外,加入无机纳米颗粒还可以略微改善膜的抗拉伸性能.
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