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Study on antibacterial properties of PA RO composite membrane grafted with APD/TOB induced by plasma

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等离子体引发 PA RO 复合膜材料接枝APD/TOB 抗菌性能的研究

Journal Information

J. Hefei Univ. Tech. (Nat. Sci.), Jun.2025, Vol.48 No.6: 776-784

DOI: 10.3969/j.issn.1003-5060.2025.06.010

Authors

WANG Xinyu $ ^{1} $, HU Shuheng $ ^{1} $, XU Zimu $ ^{1} $, LAN Yan $ ^{2} $, CHENG Cheng $ ^{2} $

(1. School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China; 2. Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China)

Abstract and Keywords

Abstract: This study used plasma-induced grafting polymerization technology to graft 3-amino-1,2-propanediol(APD) and tobramycin(TOB) onto the surface of aromatic polyamide(PA) reverse osmosis (RO) composite membrane, and prepared a modified membrane(PA $ _{x} $) with anti-biofouling properties. As the TOB mass concentration increased, the modified membrane showed significant improvement in diffusion killing, contact killing and biofilm formation inhibition abilities against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus). When the TOB mass concentration was 10 g/L, the PA $ _{10} $ modified membrane achieved a maximum zone of inhibition (ZOI) of 10.4 mm for E. coli and 20.0 mm for S. aureus. Moreover, the PA $ _{10} $ modified membrane had a contact killing rate of over 99.0% for both bacteria and biofilm formation inhibition rates of 67.4% and 85.3% for E. coli and S. aureus, respectively. This plasma method and the antibacterial mechanism of the modified membrane provide an effective strategy for RO membrane surface modification.

Keywords: aromatic polyamide(PA) reverse osmosis(RO) composite membrane; membrane biofouling; plasma modification; 3-amino-1,2-propanediol(APD); tobramycin(TOB)

作者信息

汪心雨 $ ^{1} $，胡淑恒 $ ^{1} $，许子牧 $ ^{1} $，兰彦 $ ^{2} $，程诚 $ ^{2} $

(1. 合肥工业大学资源与环境工程学院，安徽合肥 230009；2. 中国科学院等离子体物理研究所，安徽合肥 230031)

摘要和关键词

摘要: 文章采用等离子体引发接枝聚合技术，在芳香聚酰胺(PA)反渗透(reverse osmosis, RO)复合膜表面接枝了3-氨基-1,2-丙二醇(APD)和妥布霉素(TOB)，制备了具有抗生物污染性能的改性膜 $ (PA_{x}) $。随着TOB质量浓度的增加，改性膜对大肠杆菌 $ (E.\ coli) $和金黄色葡萄球菌 $ (S.\ aureus) $的扩散杀菌、接触杀菌和抑制微生物膜形成能力都有明显提升。当TOB质量浓度为10 g/L时， $ PA_{10} $改性膜对E. coli的抑菌圈(zone of inhibition, ZOI)最大可达10.4 mm，对S. aureus的ZOI最大可达20.0 mm。此外， $ PA_{10} $改性膜对2种细菌的接触杀菌率均超过99.0%，抑制生物膜形成率分别为67.4%和85.3%。该等离子体方法和改性膜的抗菌机制为RO膜表面改性提供了一种有效的策略。

关键词: 芳香聚酰胺反渗透复合膜；膜生物污染；等离子体改性；3-氨基-1,2-丙二醇（APD）；妥布霉素（TOB） 中图分类号：X52 文献标志码：A 文章编号：1003-5060（2025）06-0776-09

Funding

安徽省自然科学基金资助项目（1908085MA29；2108085MD136）

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