膜科学与技术

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Fabrication and characterization of novel composite PVDF hollow fiber membranes

Authors： ZHAO Chen, LU Xiaolong, WU Chunrui, LIU Jie

Units： State Key Laboratory of Hollow Fiber Membrane Materials and Membrane Processes, Institute of Biological and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300387, China)

KeyWords： PVDF; non-solvent induced phase separation; hollow fiber membranes; composite membranes; breaking strength

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2014,34(6):11-16

Abstract：

In this study, a new method to enhance the mechanical performance of polyvinylidene fluoride(PVDF) hollow fiber membranes has been proposed. Composite hollow fiber membranes were prepared by using co-extrusion of the dopes with different PVDF contents, along with the bore liquid through a triple-orifice spinneret via non-solvent induced phase separation method. It was expected that composite membranes could maintain original pore size, high water flux, and have higher breaking strength. The effects of the formulation of composite layer on membrane structure and performance were investigated. The results show that, the figer-like structure near outer skin would turn into cavitations, the number of pores and the pore size on the outer surface increase, and so is the pure water flux, whereas the breaking strength decreases gradually with the increase in PVDF content.

Funds：

国家自然科学基金项目（21176188，21106100）；高等学校博士学科点专项科研基金20111201110004

AuthorIntro：

赵晨（1989-），男，陕西咸阳人，硕士研究生，师承吕晓龙教授，从事分离膜的制备和研究。

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