Surface modified polymeric membranes to reduce (bio)fouling: a microbiological study using E. coli
Surface modified polymeric membranes to reduce (bio)fouling: a microbiological study using E. coli
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DOI：
10.1016/j.desal.2004.06.138
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发表时间：
2004-08-15
期刊：
影响因子：
9.9
通讯作者：
Levadna, T
中科院分区：
文献类型：
--
作者：
Hilal, N;Kochkodan, V;Levadna, T
膜（生物）污染是水处理过程中膜元件操作期间的主要问题。在降低生物（结垢）亲和力的尝试中，商业聚偏二氟乙烯（PVDF）微滤膜（Millipore）通过光引发的接枝聚合用季铵化甲基丙烯酸2（二甲基氨基）乙酯（qDMAEM）或2-丙烯酰胺基-甲基-丙烷磺酸（AMPS）作为功能单体进行表面改性。通过改变聚合时间和单体溶液浓度，获得了不同改性程度的膜。另一组PVDF膜使用聚乙烯亚胺（PEI）和甲苯二异氰酸酯之间的界面聚合进行改性。用E.大肠杆菌发现用qDMAEM以及用PEI改性的膜样品对E.杆菌并对改性膜的抗菌机理进行了讨论。
Membrane (bio)fouling is the main problem during an operation of membrane elements for water treatment processes. In an attempt to reduce a bio(fouling) affinity, commercial polyvinilidene fluoride (PVDF) microfiltration membranes (Millipore) were surface modified via photoinitiated graft polymerisation with quaternized 2(dimethylamino) ethyl metacrylate (qDMAEM) or 2-acrylamido-methyl-propane sulfonic acid (AMPS) as functional monomers. Membranes with different degrees of modification were obtained by varying the time of polymerisation and concentration of the monomer solution. Another set of PVDF membranes was modified using interfacial polymerisation between polyethyleneimine (PEI) and toluene diisocyanate. The affinity of modified membranes to biofouling was studied using E. coli bacteria. It was found that membrane samples modified with qDMAEM as well as with PEI have a strong bactericide effect towards E. coli. The possible mechanism of antimicrobial action of modified membranes has been discussed.