EFFECT OF SOLUTION EXTRUSION RATE ON MORPHOLOGY AND PERFORMANCE OF POLYVINYLIDENE FLUORIDE HOLLOW FIBER MEMBRANES USING POLYVINYL PYRROLIDONE AS AN ADDITIVE

Chang-yu Tang a; Wei Chen b; c; Wen-qing Chen b; c; Qiang Fu a; Zong-liang Du c; Yang Ye c

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EFFECT OF SOLUTION EXTRUSION RATE ON MORPHOLOGY AND PERFORMANCE OF POLYVINYLIDENE FLUORIDE HOLLOW FIBER MEMBRANES USING POLYVINYL PYRROLIDONE AS AN ADDITIVE

Papers | Updated：2021-06-21

- EFFECT OF SOLUTION EXTRUSION RATE ON MORPHOLOGY AND PERFORMANCE OF POLYVINYLIDENE FLUORIDE HOLLOW FIBER MEMBRANES USING POLYVINYL PYRROLIDONE AS AN ADDITIVE
- Vol. 28, Issue 4, Pages: 527-535(2010)
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- Published：20 July 2010
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Chang-yu Tang a, Wei Chen b, c, et al. EFFECT OF SOLUTION EXTRUSION RATE ON MORPHOLOGY AND PERFORMANCE OF POLYVINYLIDENE FLUORIDE HOLLOW FIBER MEMBRANES USING POLYVINYL PYRROLIDONE AS AN ADDITIVE[J]. 2010, 28(4): 527-535.
DOI：

Chang-yu Tang a, Wei Chen b, c, et al. EFFECT OF SOLUTION EXTRUSION RATE ON MORPHOLOGY AND PERFORMANCE OF POLYVINYLIDENE FLUORIDE HOLLOW FIBER MEMBRANES USING POLYVINYL PYRROLIDONE AS AN ADDITIVE[J]. 2010, 28(4): 527-535. DOI：

摘要

Polyvinylidene fluoride (PVDF) hollow fiber membranes prepared from spinning solutions with different polyvinyl pyrrolidone (PVP) contents (1% and 5%) at different extrusion rates were obtained by wet/dry phase process keeping all other spinning parameters constant. In spinning these PVDF hollow fibers

dimethylacetamide (DMAc) and PVP were used as a solvent and an additive

respectively. Water was used as the inner coagulant. Dimethylformamide (DMF) and water (30/70) were used as the external coagulant. The performances of membranes were characterized in terms of water flux

solute rejection for the wet membranes. The structure and morphology of PVDF hollow fiber were examined by BET adsorption

dry/wet weight method and scanning electron microscopy (SEM). It is found that the increase in PVP content and extrusion rate of spinning solution can result in the increase of water flux and decrease of solute rejection. The improvements of interconnected porous structure and pore size are induced by shear-thinning behavior of spinning solution at high extrusion rates

which could result in the increase of water flux of hollow fiber membranes. The increase of extrusion rate also leads to the increase of membrane thickness due to the recovery effect of elastic property of polymer chains.

Abstract

dimethylacetamide (DMAc) and PVP were used as a solvent and an additive

solute rejection for the wet membranes. The structure and morphology of PVDF hollow fiber were examined by BET adsorption

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