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首页> 外文期刊>ACS applied materials & interfaces >Membrane Surface Engineering with Bifunctional Zwitterions for Efficient Oil-Water Separation
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Membrane Surface Engineering with Bifunctional Zwitterions for Efficient Oil-Water Separation

机译：膜表面工程与双官能分解，用于高效的油水分离

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摘要

Chemical modification provides a solution to the membrane fouling problem in oily water purification. However, complicated synthesis processes and harsh reaction conditions are frequently encountered with this approach. Here we developed two bifunctional zwitterionic materials, i.e., n-amino-ethyl piperazine propanesulfonate (P-SO3-NH2) and 1,4-bis (3-aminopropyl) piperazine propanesulfonate (P-2SO(3-)2NH(2)), by a clean method and grafted them onto membrane surface via a fast single-step reaction. These materials endow the resultant membrane a more hydrophilic and smoother surface, significantly improving the water permeability, fouling resistance and recyclability of membrane in forward osmosis oily water reclamation. The water fluxes produced by the P-2SO(3)-2NH(2) modified membrane are 47% (from 20.0 to 29.3 LMH) and 60% (from 16.0 to 25.6 LMH) higher than those of the unmodified membrane when DI water and an oily emulsion (1500 ppm) as the respective feeds. A higher water flux recovery is also achieved for the P-2SO(3)-2NH(2) modified membrane (94%) than that of the nascent membrane (82%) after a 12-h experiment. These promising findings coupled with a facile and efficient membrane modification approach provide inspiration for both membrane exploration and oily water treatment.
机译：化学改性为油性净水中的膜污垢问题提供了一种溶液。然而，通过这种方法经常遇到复杂的合成过程和恶劣的反应条件。在这里，我们开发了两种双官能两性离子材料，即N-氨基 - 乙基哌嗪丙二酸丁酯（P-SO3-NH2）和1,4-双（3-氨基丙基）哌啶丙烯酸盐（P-2SO（3-）2NH（2）） ，通过清洁的方法通过快速单步反应将它们移植到膜表面上。这些材料赋予所得膜具有更亲水和更光滑的表面，显着提高膜的渗透性，污垢抗性和膜的再循环性，在前渗透油性水填充剂中。由P-2SO（3）-2NH（2）改性膜产生的水通量为47％（从20.0至29.3 LMH），60％（从16.0至25.6 LMH）高于DI水和膜油性乳液（1500ppm）作为相应的饲料。对于在12-H实验之后，P-2SO（3）-2NH（2）改性膜（94％）也可以实现更高的水通量回收率（3）-2NH（2）改性膜（94％）。这些有前途的发现与容易和有效的膜改性方法相结合，可为膜勘探和油性水处理提供吸气。

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