聚多巴胺-聚乙烯亚胺改性反渗透膜制备与表征

发布时间：2018-03-18 00:39

本文选题：反渗透膜　切入点：净水技术　出处：《人民长江》2017年16期 　论文类型：期刊论文

【摘要】：饮用水短缺和水污染问题严重影响着人类和社会的发展。反渗透技术提供了一种高效经济的方法来生产纯水和处理废水,以缓解这个问题。但是,反渗透膜的污染尤其是生物污染严重制约着其高效应用。膜表面改性技术是提升膜抗污染性能的最常用手段,通过多巴胺盐酸盐(DA)在聚酰胺反渗透膜表面自聚,生成超薄聚多巴胺涂层(PDA),进一步利用PDA涂层上的活性基团将聚乙烯亚胺(PEI)接枝到反渗透膜表面,得到稳定持久的PDA-PEI改性反渗透膜。通过对改性膜的XPS测试,亲水性和抗菌性试验,得到以下结论:PDA成功涂层于反渗透膜表面,且PEI成功接枝于PDA涂层表面;PDA-PEI改性增大了膜表面的亲水性,提升了反渗透膜抗污染的能力,使其具有了一定的抗菌能力。
[Abstract]:The shortage of drinking water and water pollution problems seriously affect human and social development. Reverse osmosis technology provides an efficient and economical way to produce pure water and treat wastewater to alleviate the problem. The fouling of reverse osmosis membrane, especially biological pollution, seriously restricts its efficient application. Membrane surface modification technology is the most commonly used means to improve the anti-fouling performance of the membrane, and self-agglomerates on the surface of polyamide reverse osmosis membrane by dopamine hydrochloric acid (DADA). The ultrathin polydopamine coating (PDAA) was formed, and the PDA-PEI modified reverse osmosis membrane was prepared by grafting polyvinyleneimine (PDA-PEI) onto the surface of reverse osmosis (RO) by using the active group on the PDA coating. The modified membrane was tested by XPS. The results of hydrophilic and antimicrobial tests showed that PEI was successfully coated on the surface of reverse osmosis membrane, and PEI grafted on the surface of PDA coating increased the hydrophilicity of membrane surface and enhanced the anti-fouling ability of reverse osmosis membrane. It has a certain antibacterial ability.
【作者单位】：水利部科技推广中心;长江科学院水土保持研究所;
【基金】：水利部“948”计划项目“无人机载微型高光谱成像仪”(201507)
【分类号】：TQ051.893

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