The role of phase transfer catalysts on properties of polyamide thin-film composite forward osmosis membranes
The role of phase transfer catalysts on properties of polyamide thin-film composite forward osmosis membranes
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相转移催化剂对聚酰胺薄膜复合正渗透膜性能的影响
DOI：
10.1016/j.cej.2021.128989
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发表时间：
2021-02
影响因子：
15.1
通讯作者：
Dongping Duan
中科院分区：
文献类型：
--
作者：
Qibo Jia;Yan Li;Zhong Li;Yan Liu;Dongping Duan
本文以1，3，5-苯三甲酰三氯化物(TMC)、间苯二胺(MPD)和相转移催化剂(PTCS)为原料，通过界面聚合(IP)反应制备了聚酰胺薄膜复合正向渗透(FO)膜。系统研究了十二烷基三甲基氯化铵(DTAC)、十二烷基硫酸钠(十二烷基硫酸钠)和十二烷基二甲基甜菜碱(BS12)对聚酰胺分子聚集结构、表面形态和FO分离性能的影响。在FO工艺中，选择浓度为1.0 M的氯化钠水溶液作为牵伸溶液，以0.1 M的氯化钠水溶液作为进料液(在室温下)。分离性能包括水通量(JW)和反向盐析出(反向溶质通量，RS)。实验证明，PTCS可以调节聚酰胺分子链的聚集状态和表面形态，对聚酰胺的水通量(11.5 L m−2H−1)有较大的改善。同时发现聚酰胺表面形态对FO膜的透水性起主要作用，而不是皮肤层的密度(即交联度)，我们发现相对光滑的表面更有利于弱化FO过程中出现的外部浓差极化(ECP)现象。我们将聚酰胺的这一机理归因于PTCs的尺寸效应和电荷相互作用。在目前的研究中，应该综合考虑聚酰胺的分子结构和粗糙表面的协同作用对FO分离性能的平衡影响。
In this article, 1,3,5-benzenetricarbonyl trichloride (TMC),m-phenylenediamine (MPD) and phase transfer catalysts (PTCs) were used to produce polyamide thin-film composite (TFC) forward osmosis (FO) membranes through interfacial polymerization (IP) reaction. The effects of dodecyl trimethyl ammonium chloride (DTAC), sodium dodecyl sulphate (SDS) and dodecyl dimethyl betaine (BS12) on the polyamide molecular aggregation structures, surface morphology and FO separation performance of the membranes were systematically investigated. In the FO process, concentrated 1.0 M NaCl aqueous solution was chosen as the draw solution and 0.1 M NaCl aqueous solution was used as the feed solution (at room temperature). Separation performance included the water flux (Jw) and reverse salt rejection (reverse solute flux,RS). The experiment proved that PTCs can regulate the molecular chain aggregation state and surface morphology of polyamide, which can lead to a relatively definite improvement in water flux (11.5 L m−2h−1) (DTAC-polyamide). Simultaneously, the polyamide surface morphology was found to play a major role in the water permeability of the FO membrane rather than the density of the skin layer (i.e., degree of cross-linking), and we found that a relatively smooth surface is more conducive to weakening the external concentration polarization (ECP) phenomenon that occurs in the FO process. We attribute this mechanism on polyamide to the size effect and charge interaction of PTCs. In the current study, the balanced effect of the synergistic interaction of the molecular structure and rough surface of polyamide on FO separation performance should be comprehensively considered.
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影响因子：
2.8
作者：
Busse A
通讯作者：
Busse A
影响因子：
8.6
作者：
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作者：
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影响因子：
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DOI：
10.1016/b978-0-444-63428-3.50143-0
发表时间：
2016
期刊：
Computer-aided chemical engineering
影响因子：
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作者：
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通讯作者：
Amata Anantpinijwatna;S. H. Kim;M. Sales-Cruz;R. Gani