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远程动态低温等离子体接枝制备抗菌亲水多孔膜

发表时间:2013-04-15  浏览量:1378  下载量:565
全部作者: 张悦,赵之平,李梅生
作者单位: 北京理工大学化工与环境学院
摘 要: 研究采用远程动态低温等离子体(long-distance and dynamic low-temperature plasma, LDDLTP)活化-接枝法,将水溶液中抗菌单体甲基丙烯酰氧乙基-苄基-二甲基氯化铵(DMAE-BC)接枝到聚丙烯纤维(polypropylene fibrous, PPF)多孔膜的纤维表面,制备了具有抗菌功能的亲水膜材料。通过傅里叶红外光谱(Fourier transform infrared, FTIR)、X射线光电子能谱(X-ray photoelectron spec, XPS)和扫描电镜(scaning electron microscope, SEM)分析改性前后膜表面官能团、元素组成以及膜表面形貌的变化,结果表明,DMAE-BC接枝聚合到了膜表面。以大肠杆菌为模拟体系,采用平板计数法和吸光度法分别考察改性膜的杀菌(Escherichia coli)和抑菌效果。结果表明:改性后的PPF膜具有很强的杀菌和抑菌作用,且随接枝率的增大,抗菌特性增强。另外,接枝膜在实现抗菌改性的同时亲水性和渗透性也有明显改善,在0.02 MPa 跨膜压差下,原膜检测不到水通量,而对于接枝率为4.04 mg/g 的膜,膜表面接触角减小了近35°,纯水通量达 4 400 kg/(m2·h).
关 键 词: 膜分离;远程动态低温等离子体;聚丙烯纤维多孔膜;抗菌接枝;甲基丙烯酰氧乙基-苄基-二甲基氯化铵
Title: Preparation of antibacterial and hydrophilic membranes by long-distance and dynamic low-temperature plasma flow
Author: ZHANG Yue, ZHAO Zhiping, LI Meisheng
Organization: School of Chemical Engineering and Environment, Beijing Insititute of Technology
Abstract: Polypropylene fibrous (PPF) membranes were grafted with methyl acryloyl oxygen ethyl benzyl dimethyl ammonium chloride (DMAE-BC) by long-distance and dynamic low-temperature plasma (LDDLTP) flow in order to achieve antibacterial properties. The PPF membranes were firstly treated by Ar LDDLTP flow and then grafted with DMAE-BC in aqueous solutions. Then, the function groups, element composition and morphology of the modified membranes were analysised by Fourier transform infrared (FTIR), X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM), respectively, and the results showed that DMAE-BC was grafted with membrane successfully. Furthermore, plate counting method and absorption photometry were used to evaluate the sterilization and bacteriostatic properties of the membranes against Gram-negative Escherichia coli, respectively. The results indicated that the modified membranes had strong sterilization and bacteriostatic properties, and with the increasing of the grafting yield, the antibacterial property increased. In addition, the hydrophilicity and pure water flux of the modified membranes had a significant improvement. When the grafting yield was 4.04 mg/g, the contact angle decrease 35�and the pure water flux got to 4 400 kg/(m2穐) at a transmembrane pressure of 0.02 MPa.
Key words: membrane separation; long-distance and dynamic low-temperature plasma flow; polypropylene fibrous membranes; antibacterial grafting; DMAE-BC
发表期数: 2013年4月第7期
引用格式: 张悦,赵之平,李梅生. 远程动态低温等离子体接枝制备抗菌亲水多孔膜[J]. 中国科技论文在线精品论文,2013,6(7):690-696.
 
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