Biguanidine functionalized polyvinylamine modified reverse osmosis membrane with improved anti-bacterial property

ZHOU Yixuan; WANG Zhi; DONG Chenxi; WANG Yao; WANG Jixiao

doi:10.11949/j.issn.0438-1157.20170978

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Biguanidine functionalized polyvinylamine modified reverse osmosis membrane with improved anti-bacterial property

更新时间：2025-12-10

- Biguanidine functionalized polyvinylamine modified reverse osmosis membrane with improved anti-bacterial property
- CIESC Journal Issue 2, Pages: 858-865(2018)
- 作者机构：
  
  化学工程联合国家重点实验室, 天津大学化工学院, 化学工程研究所, 天津化学化工协同创新中心, 天津市膜科学与海水淡化技术重点实验室,天津,300072
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20170978
  CLC： Q028.8
- Online First：05 February 2018，
  
  Published：05 February 2018
- 稿件说明：
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ZHOU Yixuan, WANG Zhi, DONG Chenxi, et al. Biguanidine functionalized polyvinylamine modified reverse osmosis membrane with improved anti-bacterial property[J]. CIESC Journal, 2018, (2): 858-865.
DOI：

ZHOU Yixuan, WANG Zhi, DONG Chenxi, et al. Biguanidine functionalized polyvinylamine modified reverse osmosis membrane with improved anti-bacterial property[J]. CIESC Journal, 2018, (2): 858-865. DOI： 10.11949/j.issn.0438-1157.20170978.

摘要

反渗透作为一种高效、低能耗的膜分离技术，在使用过程中极易受到生物污染的侵袭，造成膜性能不可逆下降。制备具有杀菌功能的反渗透膜可以有效缓解膜生物污染问题。采用二次界面聚合法，将合成的双胍基化聚乙烯胺（PVAmG）阳离子聚合物引入到初生反渗透膜表面，制备出具有杀菌功能的PVAmG改性反渗透膜。结果表明，改性后膜表面的微观形貌和润湿性变化不大，在中性条件下膜表面荷正电。PVAmG改性膜在不降低膜选择透过性能的同时，有效提高了抗生物污染性能。PVAmG改性膜与枯草杆菌和大肠杆菌连续接触4次后，膜面细菌死亡率每次均接近99.9%，表明PVAmG改性膜具有持久的广谱杀菌性。

Abstract

Membrane bio-fouling is one of the main obstacles for the wide application of reverse osmosis (RO) membrane technology. To solve this problem

a novel anti-bacterial RO membrane was fabricated by second interfacial polymerization of self-synthesized cationic biguanidine functionalized polyvinylamine (PVAmG). Virgin membranes and the polyvinylamine (PVAm)-modified RO membranes were prepared for comparisons. The chemical structures of PVAm and PVAmG were characterized by Fourier transform infrared spectroscopy and elemental analysis. The membranes were systematically characterized by XPS

SEM

AFM

contact angle analyzer and Zeta potential analyzer. The test results show that the modified membranes well maintain the high permselectivity. Moreover

the PVAmG-modified membranes exhibited strong anti-bacterial property (mortalities of 99.9%) against both the Gram-negative Escherichia coli and Gram-positive Bacillus subtilis.

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