Preparation of Nonstoichiometric Silica with Multi-Active Groups and Effect of Its Doping on Polysulfone Membrane Capabilities

Abstract

Nonstoichiometric silica with multi-active groups particles (NS-MAG particles) were first synthesized, and then added to the porous matrix of PSF to prepare a NS-MAG/PSF composite membrane through a phase inversion process. The optimum preparation conditions of NS-MAG particles were researched and determined. Then the permeation fluxes of NS-MAG/PSF membranes with different doping amount of NS-MAG particles were tested. NS-MAG/PSF membrane, SiO₂/PSF membrane, and PSF membrane were prepared respectively. These membranes were characterized by testing the tensile strength and the permeation flux. The results show that doping NS-MAG particles can better enhance the tensile strength and permeation flux of PSF membrane.

Keywords:

• composite membrane
• hydrophilic property
• nonstoichiometric silica
• polysulphone
• wastewater containing oil

ACKNOWLEDGEMENTS

This project is supported by the Project supported by National Natural Science Foundation of China (No. 21076143), by the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry (No. 2009-1341), by the project funded by the Key Laboratory of Inorganic Film Materials, Chinese Academy of Sciences (No. KLICM-2010-06, KLICM-2011-07), by the Innovation Fund of Tianjin University and Hainan University (No. 1107026), by the Program of Introducing Talents of Discipline to Universities (No. B06006), by the Basic Research of Tianjin Municipal Science and Technology Commission (No.07JCYBJC00700), and by Petro China Innovation Fund (No.060511-6-3).