首页> 外文期刊>Journal of Applied Polymer Science >Dendritic molecules give excellent long-lasting desalination fouling resistance to reverse osmosis membrane by generating an amine-rich layer
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Dendritic molecules give excellent long-lasting desalination fouling resistance to reverse osmosis membrane by generating an amine-rich layer

机译:树枝状分子通过产生富含胺的层,为反渗透膜提供优异的长期脱盐污垢抗性

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The organic fouling of polyamide membranes is one of the most serious problems in reverse osmosis fields such as sea water desalination and sewage disposal. In this study, poly(ethylene imine)-poly(ethylene glycol) dendrimer is used to improve the fouling resistance of polyamide reverse osmosis membranes. A crucial pretreatment is carried out with a reaction between poly(ethylene imine) and acyl chloride on the nascent polyamide surface, generating an amine-rich selective layer. Poly(ethylene glycol) diglycidyl ether is then attached to the primary amine group. The results illustrate a remarkable improvement in membrane surface hydrophilicity after modification (the contact angle decreases from 96.7 degrees to 49.5 degrees). Dynamic fouling tests are implemented with bovine serum albumin as a typical protein foulant, in which the membranes show very low protein adsorption (flux recovery ratio 96.9%). After 11-cycle fouling tests, the membranes show excellent long-term stability and remarkable antifouling property and cleaning performance. This approach of grafting a dendrimer might provide new insight for antifouling modifications for membranes. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47368.
机译:聚酰胺膜的有机污染是在反渗透领域如海水淡化和污水处理的最严重的问题之一。在这项研究中,聚(乙烯亚胺) - 聚(乙二醇)树枝状聚合物用于提高聚酰胺反渗透膜的结垢阻力。一个关键的预处理使用和新生的聚酰胺表面上的酰氯的聚(乙烯亚胺)之间的反应来进行,产生富含胺的选择性层。然后聚(乙二醇)二环氧甘油醚被附接到伯胺基团。的结果说明修饰(接触角从96.7度减小到49.5度)之后在膜表面的亲水性显着提高。动态结垢测试用牛血清白蛋白来实现作为一个典型的蛋白质污垢,其中,所述膜显示出非常低的蛋白质吸附(通量恢复率96.9%)。 11周期污垢试验后,膜显示出优异的长期稳定性和卓越的耐污染性和清洁性能。嫁接树枝状聚合物的这种做法可能会为防污修改为膜提供了新的见解。 (c)2018 Wiley期刊,Inc.J.Phill。聚合物。 SCI。 2019年,136,47368。

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