A Feasible Post-Treatment of Drying and Rewetting for Preparation of High-Flux Pluronic F127/Polyethersulfone Nanofiltration Membranes

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• 作者：Yan Zhang ; Yanlei Su ; Wenjuan Chen ; Jinming Peng ; Yanan Dong ; Zhongyi Jiang
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2011
• 出版时间：April 20, 2011
• 年：2011
• 卷：50
• 期：8
• 页码：4678-4685
• 全文大小：955K
• 年卷期：v.50,no.8(April 20, 2011)
• ISSN：1520-5045

文摘

Pluronic F127/polyethersulfone (PES) blend nanofiltration membranes were fabricated by varying polymer weight ratios of W_F127/W_PES in casting solutions from 0.0 to 100.0 wt鈥?. The initial wet membranes prepared via the phase inversion method were post-treated by drying at room temperature and then immersion into water for rewetting to obtain Pluronic F127/PES nanofiltration membranes. Membrane shrinkage and swelling, cross section and surface morphologies, water uptake, surface hydrophilicity, X-ray diffraction pattern, water flux, and rejection of dyes for Pluronic F127/PES nanofiltration membranes were investigated. The introduction of Pluronic F127 into PES membranes can substantially alleviate the membrane shrinkage during drying treatment. All of the prepared Pluronic F127/PES nanofiltration membranes can completely reject Alcian blue with a molecular weight of 1299. The water permeance of Pluronic F127/PES nanofiltration membrane at W_F127/W_PES of 80% is as high as 176.2 L/(m² h MPa). After long-term immersion into sodium hypochlorite solution, Pluronic F127/PES nanofiltration membranes still keep over 95.7% rejection of Alcian blue.