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化学学报
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化学学报 ›› 2008, Vol. 66 ›› Issue (13): 1583-1588. 上一篇    下一篇

研究论文

紫外辐照接枝制备亲水性荷正电纳滤膜

曹绪芝 张明刚 平郑骅*   

  1. (教育部聚合物分子工程重点实验室 复旦大学高分子科学系 上海 200433)
  • 投稿日期:2007-09-27 修回日期:2008-01-09 发布日期:2008-07-14
  • 通讯作者: 平郑骅

Preparation of Hydrophilic Positively Charged Nanofiltration Membrane by UV Graft Polymerization

CAO, Xu-Zhi ZHANG, Ming-Gang PING, Zheng-Hua*   

  1. (Key Laboratory of Molecular Engineering of Polymers, Ministry of Education, Department of Macromolecular Science,
    Fudan University, Shanghai 200433)
  • Received:2007-09-27 Revised:2008-01-09 Published:2008-07-14
  • Contact: PING, Zheng-Hua

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661

被引次数

15 | 3

通过在酚酞基聚芳醚酮超滤膜表面紫外辐照接枝亲水性单体二烯丙基二甲基氯化铵(DADMAC)制备了一种表面荷正电的纳滤膜. ATR-FTIR和表面水接触角的研究结果表明膜表面的接枝率和亲水性随着辐照时间和单体在接枝溶液中的浓度的增加而增加. 荷正电纳滤膜对盐溶液有很好的截留, 对盐溶液中的高价阳离子和低价阳离子的截留率分别为95%和65%. 但当溶液中存在高价负离子时, 膜的截留性能会明显下降. 表明静电效应在荷电纳滤膜的分离过程中起了重要的作用.

关键词: UV辐照, 酚酞基聚芳醚酮, 荷电纳滤膜, 二烯丙基二甲基氯化铵

A hydrophilic positively charged nanofiltration membrane was prepared by UV irradiation graft polymerization of diallydimethyl ammonium chloride (DADMAC) onto the surface of ultrafiltration membranes made of polyetherketone cardo (PEK-C). Analysis of ATR-FTIR and contact angles of the modified membrane showed that the grafting degree of the membrane and their hydrophilicity increased with the irradiation time and the monomer concentration in grafting solution. The modified nanofiltration showed a good retention to salts and the retention of the membrane to high valent cation and low valent cation was 95% and 65%, respectively. The separation performance of the membrane decreased in the presence of high valent negative counter-ions. The results show that the electrostatic effect played a major role in nanofiltration by charged membrane.

Key words: UV irradiation, polyetherketone-cardro, charged nanofiltration membrane, diallydimethyl ammonium chloride