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过程工程学报 ›› 2016, Vol. 16 ›› Issue (2): 356-360.DOI: 10.12034/j.issn.1009-606X.215327

• 材料工程专栏 • 上一篇    

混合溶剂制备醋酸纤维素膜及其性能

刘方 李巧玲   

  1. 中北大学理学院化学系 中北大学理学院化学系
  • 收稿日期:2015-09-15 修回日期:2015-12-11 出版日期:2016-04-20 发布日期:2016-12-22
  • 通讯作者: 李巧玲

Preparation and Performance of Cellulose Acetate Membrane with Mixed Solvents

LIU Fang LI Qiao-ling   

  1. School of Science, North University of China School of Science, North University of China
  • Received:2015-09-15 Revised:2015-12-11 Online:2016-04-20 Published:2016-12-22
  • Contact: LI Qiao-ling

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被引次数

2

摘要： 以醋酸纤维素、丙酮、N-甲基吡咯烷酮(NMP)和聚乙二醇400(PEG-400)为原料，采用相转化法制备醋酸纤维素膜，对其结构和形貌进行了表征；在室温、操作压力0.1 MPa下，用去离子水和500 mg/L PEG-600溶液分别测定膜的水通量和截留率，考察了混合溶剂中丙酮和NMP含量、反应温度和致孔剂PEG-400含量对醋酸纤维素膜性能的影响. 结果表明，NMP含量60%(w)、丙酮含量22.5%(w)、反应温度60℃及PEG-400含量6%(w)条件下，所制醋酸纤维素膜表面光滑，孔径分布均匀，水通量达212.87 L/(m2×h)，截留率达87.67%.

关键词: 醋酸纤维素, 混合溶剂, 膜分离, 液固相转化法, 致孔剂

Abstract: Cellulose acetate (CA) membrane was prepared by liquid-solid phase inversion method with cellulose acetate, acetone, N-methylpyrrolidone (NMP) and polyethylene glycol 400 (PEG-400) as raw materials. The structure and morphology of CA membrane were characterized. At room temperature, the prepared CA membrane was used to treat deionized water and 500 mg/L polyethylene glycol 600 under the pressure of 0.1 MPa in its water flux and rejection rate, respectively. The effects of mixed solvent content, reaction temperature and PEG-400 content on the separation properties of membrane were examined. The results showed that under the conditions of NMP and PEG-400 contents of 60% and 6%(w), and reaction temperature of 60℃, the prepared CA membrane surface was smooth and the pore size distribution uniform, its water flux was 212.87 L/(m2×h), and the rejection rate 87.67%.

Key words: cellulose acetate, mixed solvent, membrane separation, liquid-solid phase inversion method, porogen

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