Abstract

A simple method to prepare pH responsive Poly (vinyl chloride) (PVC) composite membrane was provided by blending with Polyacrylonitrile (PAN) hydrolysed. To introduce reactive groups for weak polyelectrolye, PVC/PAN/SiO₂ composite hollow fiber membranes (HFMs) was prepared by a hydrolysis of polyacrylonitrile in different concentration alkaline solution. The Fourier transform infrared spectroscopy (FTIR) and scanning electron micrograph (SEM) were used to characterize the chemical and morphological changes of the composite membranes. The pH responsive of the obtained composite membrane performance was discussed by the water flux, reversible permeability experiments and diffusional permeability experiments. The results revealed that the obtained membranes with hydrolysis reaction showed evident pH sensitivity.

摘要

通过与水解的聚丙烯腈（PAN）混合，提供了一种制备pH响应型聚氯乙烯（PVC）复合膜的简单方法。为了引入弱聚电解质的反应性基团，通过在不同浓度的碱性溶液中水解聚丙烯腈，制备了PVC / PAN / SiO ₂复合中空纤维膜（HFMs）。傅里叶变换红外光谱（FTIR）和扫描电子显微镜（SEM）用来表征复合膜的化学和形态变化。通过水通量，可逆渗透性实验和扩散渗透性实验讨论了所得复合膜性能的pH响应性。结果表明，所获得的具有水解反应的膜表现出明显的pH敏感性。