化工进展 ›› 2022, Vol. 41 ›› Issue (10): 5530-5540.DOI: 10.16085/j.issn.1000-6613.2021-2667

• 材料科学与技术 • 上一篇    下一篇

基于聚异丁烯胺改性的耐甲醇溶胀新型薄膜复合膜

丁俊毅1(), 陈营东1, 王书浩1, 严文韬1, 周勇1,2(), 高从堦1   

  1. 1.浙江工业大学化工学院膜分离与水科学技术中心,浙江 杭州 310014
    2.浙江工业大学膜分离与水处理协同 创新中心湖州研究院,浙江 湖州 313000
  • 收稿日期:2021-12-31 修回日期:2022-02-07 出版日期:2022-10-20 发布日期:2022-10-21
  • 通讯作者: 周勇
  • 作者简介:丁俊毅(1997—),男,硕士研究生,研究方向为膜科学与技术。E-mail:1149857769@qq.com
  • 基金资助:
    浙江省重点研发计划(2021C01173);国家自然科学基金(22008216)

Methanol swelling-resistant novel TFC membrane based on polyisobutylene amine modification

DING Junyi1(), CHEN Yingdong1, WANG Shuhao1, YAN Wentao1, ZHOU Yong1,2(), GAO Congjie1   

  1. 1.Center for Membrane Separation and Water Science & Technology, College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, Zhejiang, China
    2.Colaborative Imovation Center for Membrane Separation and Water Treatmert of Zhejiang Province Huzhou Institute, Huzhou 313000, Zhejiang, China
  • Received:2021-12-31 Revised:2022-02-07 Online:2022-10-20 Published:2022-10-21
  • Contact: ZHOU Yong

摘要:

聚合物膜可以在甲醇/染料废液处理中发挥重要作用。为了保证膜在甲醇处理过程中的高性能,提高膜的耐甲醇溶胀性是必要的。然而,关于耐甲醇溶胀膜的研究相对较少。在此,提出将活性聚合物(聚异丁烯胺,PIBA)引入分离层,制备新型耐甲醇溶胀聚酰胺(PA)薄膜复合(TFC)膜。PIBA的掺入增加了膜的表面粗糙度、活性层厚度和活性层背面的致密性。PIBA提高了膜的耐甲醇溶胀性能:当PIBA的添加量从0增加到1g/L时,溶胀率从46.81%下降到15.00%。因此,PA/PIBA膜表现出比PA膜更高的染料(藏红T)截留率(99.53%与94.62%)。此外,在20bar(1bar=0.1MPa)的操作压力下,PA/PIBA膜保持了高通量[84.62L/(m2·h)]和良好的长期运行稳定性。最后,由于聚异丁烯(PIB)在先前的工作中同样用于提高膜的耐甲醇溶胀性,本工作将PIBA与PIB进行了比较,得出PIBA优于PIB。这项工作为开发一种用于甲醇流出物处理的分离膜提供了新途径。

关键词: 分离, 膜, 聚合物, 耐甲醇溶胀, 聚异丁烯胺

Abstract:

Polymer membrane can play a big role for methanol/dye effluent treatment. For guaranteeing a high performance, enhancing the methanol swelling resistance of membrane is necessary. However, works on organic solvent-resistant membranes for methanol are relatively few. Herein, an active polymer (polyisobutenamine, PIBA) is proposed to be introduced into the separation layer for preparing a novel methanol swelling-resistant polyamide (PA) thin film composite (TFC) membrane. The incorporation of PIBA was confirmed. PIBA increased the membrane surface roughness, active layer thickness and backside compactness of active layer. The methanol swelling resistance of membrane was enhanced obviously by PIBA. The swelling rate dropped from 46.81% to 15.00% when the addition amount of PIBA increased from 0 to 1g/L. Because of this, PA/PIBA TFC membrane exhibited a far higher dye (Safranine T) rejection than PA TFC membrane (99.53% vs. 94.62%). Besides, the PA/PIBA TFC membrane maintained a high flux [84.62L/(m2•h)] and a satisfactory long-term operation stability at an operating pressure of 20bar. Finally, since polyisobutylene (PIB) was also used in previous work to improve the methanol swelling resistance of the membrane, and thus PIBA and PIB were compared. By comparison, PIBA was superior to PIB. This work provided a new avenue for developing a separation membrane for methanol effluent treatment. As a result, PIBA is superior to polyisobutylene. This work provides a novel pathway for developing separation membranes toward methanol effluent treatment.

Key words: separation, membranes, polymers, methanol swelling resistance, polyisobuteneamine

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