pH-responsive PVC/PAN/SiO₂ composite hollow fiber membrane based on polyacrylonitrile hydrolysed

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.

Keywords:

• Poly(vinyl chloride)
• polyacrylonitrile
• pH responsive
• composite membrane

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

The authors gratefully acknowledge the State Key Laboratory of Separation Membrane and Membrane Process (Tianjin Polytechnic University, No. M2-201601), China National Textile And Apparel Council Technical Guidance Project (2018067), the Program for Foundation of He’nan educational Committee (No. 16B540001, No. 14A540004) and Doctor Foundation of Henan University of Engineering (No. D2012025).