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首页> 外文期刊>RSC Advances >Establishment of transport channels with carriers for water in reverse osmosis membrane by incorporating hydrotalcite into the polyamide layer
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Establishment of transport channels with carriers for water in reverse osmosis membrane by incorporating hydrotalcite into the polyamide layer

机译：通过将水滑石掺入聚酰胺层中，在反渗透膜中建立带有水载体的运输通道

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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) via 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.
机译：界面聚合过程中，通过在聚酰胺层中掺入水滑石（HT），采用两种方法制备了薄膜纳米复合（RON）反渗透（RO）膜：（1）将HT直接分散在水溶液中; （2）通过HT的煅烧制备层状双氧化物（LDO），然后将获得的LDO分散在水溶液中以重建HT。结果表明，TFN RO膜的水通量比原始RO膜高，这主要归因于HT构造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制备的膜显示出更高的水通量，这有助于煅烧和重构反应过程中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膜的水通量提高了19.1％和22.8％，而没有牺牲盐分。

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