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通过将水滑石掺入聚酰胺层在反渗透膜中建立带有水载体的传输通道。

Establishment of transport channels with carriers for water in reverse osmosis membrane by incorporating hydrotalcite into the polyamide layer.

作者信息

Tian Xinxia, Wang Jian, Zhang Huifeng, Cao Zhen, Zhao Man, Guan Yipeng, Zhang Yushan

机构信息

Institute of Seawater Desalination and Multipurpose Utilization, State Oceanic Administration Tianjin 300192 China

出版信息

RSC Adv. 2018 Apr 3;8(22):12439-12448. doi: 10.1039/c7ra13562a. eCollection 2018 Mar 26.

DOI:10.1039/c7ra13562a
PMID:35539378
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9079327/
Abstract

Thin film nanocomposite (TFN) reverse osmosis (RO) membranes were prepared by incorporating hydrotalcite (HT) in polyamide layer during interfacial polymerization process using two methods: (1) dispersing HT in aqueous solution directly; (2) preparing layered double oxide (LDO) calcination of HT and then dispersing the obtained LDO in aqueous solution to reconstruct HT. The results demonstrated that TFN RO membranes exhibited higher water flux compared with the pristine RO membrane, which could be mainly attributed to water channels constructed by HT as well as the enhancement of hydrophilicity and the increase of relative surface area. In addition, TFN RO membranes prepared using LDO showed higher water flux than those prepared using HT, which is contributed to the uniform distribution of water channels in polyamide layer resulting from the process of calcination and reconstruction reaction. Compared with pristine RO membrane, water flux of TFN RO membranes prepared with 0.075 wt% HT and those prepared with 0.050 wt% LDO was enhanced by 19.1% and 22.8% without sacrificing the salt rejection.

摘要

通过两种方法在界面聚合过程中将水滑石（HT）掺入聚酰胺层中来制备薄膜纳米复合（TFN）反渗透（RO）膜：（1）将HT直接分散在水溶液中；（2）对HT进行煅烧制备层状双金属氧化物（LDO），然后将所得LDO分散在水溶液中以重构HT。结果表明，与原始RO膜相比，TFN RO膜表现出更高的水通量，这主要归因于由HT构建的水通道以及亲水性的增强和相对表面积的增加。此外，使用LDO制备的TFN RO膜比使用HT制备的TFN RO膜表现出更高的水通量，这归因于煅烧和重构反应过程导致聚酰胺层中水通道的均匀分布。与原始RO膜相比，用0.075 wt% HT制备的TFN RO膜和用0.050 wt% LDO制备的TFN RO膜的水通量分别提高了19.1%和22.8%，同时并未牺牲脱盐率。

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