Mechanically robust and highly permeable AquaporinZ biomimetic membranes
Mechanically robust and highly permeable AquaporinZ biomimetic membranes
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DOI：
10.1016/j.memsci.2013.01.031
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发表时间：
2013-05-01
影响因子：
9.5
通讯作者：
Hong, Minghui
中科院分区：
文献类型：
--
作者：
Wang, Hong Lei;Chung, Tai-Shung;Hong, Minghui
海水淡化和使用膜技术的水再利用可以为世界提供可持续的水供应，如果这样的过程能够更节能的话。为了利用自然界中高效的水传输，有人建议将跨膜水通道AquaporinZ(AqpZ)引入仿生膜中。然而，仿生膜本质上太脆弱，不能用于水的净化。在这里，我们报告了一种健壮的囊泡仿生膜的设计和合成路线。膜是由包埋在AqpZ上的嵌段共聚物小泡交联而成，然后通过共价结合将小泡固定在膜载体上，然后通过优化的逐层多巴胺(PDA)-组氨酸(His)包覆工艺来稳定膜。与市售HTI膜相比，在正渗透操作中，以6000ppmNaC l为原料，0.8M蔗糖为吸水溶质时，包埋AqpZ的囊泡膜的水通量(17.6 L/m(2)/h)和高盐柱截留率(91.8%)均有数量级的提高。因此，泡状膜的设计可能为AQP包埋仿生膜的设计和制备提供新的思路。(C)2013爱思唯尔B.V.保留所有权利。
Seawater desalination and water reuse using membrane technology can provide a sustainable water supply to the world if such processes can be more energy-efficient. To harness the highly efficient water transport used by nature, it is proposed to incorporate trans-membrane water channel, AquaporinZ (AqpZ), into biomimetic membranes. However, the biomimetic membranes are intrinsically too fragile to be used in water purification. Here, we report a robust vesicular biomimetic membrane design and the synthesis route. The membrane is formed by cross-linking AqpZ-embedded block copolymer vesicles, followed by immobilizing vesicles on the membrane support via covalent binding, and then stabilizing through an optimized layer-by-layer polydopamine (PDA)-histidine (His) coating process. As compared with commercially available HTI membranes, the AqpZ-embedded vesicular membrane shows an order-of-magnitude increment in water flux (17.6 L/m(2)/h) with high salt retention (91.8%) when using 6000 ppm NaCl as the feed and 0.8 M sucrose as the draw solute in the forward osmosis operation. Thus, the vesicular membrane design may provide new insights into the design and fabrication of Aqp-embedded biomimetic membranes. (C) 2013 Elsevier B.V. All rights reserved.