Box-Behnken design as a systematic approach to inspect correlation between synthesis conditions and desalination performance of TFC RO membranes
Box-Behnken design as a systematic approach to inspect correlation between synthesis conditions and desalination performance of TFC RO membranes
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DOI：
10.1016/j.desal.2017.06.022
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发表时间：
2017-10
期刊：
影响因子：
9.9
通讯作者：
V. Vatanpour;M. Sheydaei;M. Esmaeili
中科院分区：
文献类型：
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作者：
V. Vatanpour;M. Sheydaei;M. Esmaeili
薄膜复合（TFC）膜的性能和性质由多个制备变量控制，例如所用聚合物/添加剂的化学性质和界面聚合条件。在这项研究中，开发了一种综合统计系统方法来研究 TFC 反渗透 (RO) 膜的脱盐性能与使用著名单体即间苯二胺 (MPD) 和均苯三甲酰氯 (TMC) 的界面聚合条件之间的联系。预计统计结果可以提高对 TFC 膜性能与合成关系的理解。六个关键制备因素对聚酰胺层形成的影响，包括：MPD、三乙胺（TEA）、樟脑磺酸（CSA）和TMC浓度；研究了水相浸泡时间和有机相浸泡时间，以确定它们的最佳值以及对脱盐性能的相互作用影响。根据脱盐率和渗透通量对制备的 RO 膜进行评估。开发了两个数学模型来将脱盐率和渗透通量的制备因素关联起来。 TMC2、TEA 和 TEA × CSA 被认为是膜通量最有效的术语，而排斥最有效的术语是 MPD × TMC、CSA2、TMC2 和 MPD。 MPD 浸泡时间的减少导致膜通量的提高。结果表明，考虑脱盐性能和制备条件之间的相互作用，并规划制备 TFC RO 膜的策略以最大限度地提高脱盐性能具有重要意义。 RO工艺的最佳条件为MPD为1.75 wt%，水相浸泡时间为5.0 min，TEA为3.0 wt%，CSA为1.89 wt%，TMC为0.26 wt%，有机相浸泡时间为1.0 min。实验获得的最佳条件下的通量和截留效率 (%) 分别等于 36.3 ± 1.9 和 98.12 ± 0.35%。
The performance and properties of thin film composite (TFC) membranes are controlled with several preparation variables such as chemistry of used polymers/additives and interfacial polymerization conditions. In this research an integrated statistic-systematic approach was developed to investigate the connection between desalination performance of the TFC Reverse osmosis (RO) membranes and interfacial polymerization condition using famous monomers i.e.m-phenylene diamine (MPD) and trimesoyl chloride (TMC). It was anticipated that statistic results could improve understanding of performance-synthesis relationships of TFC membranes. Effect of six key preparation factors on polyamide layer formation including: MPD, triethylamine (TEA), camphor sulfonic acid (CSA) and TMC concentrations; aqueous phase immersion time and organic phase immersion time were investigated to govern their optimum values and interactional effect on desalination performance. The prepared RO membranes were evaluated based on salt rejection and permeate flux. Two mathematical models were developed to correlate preparation factors by salt rejection and permeate flux. The TMC2, TEA and TEA × CSA were recognized as most effective terms on membrane flux and the most effective terms on rejection are the MPD × TMC, CSA2, TMC2and MPD. Reduction in immersion time of MPD led to improve in membrane flux. The results presented the significance of taking to account interactions between the desalination performance and the preparation conditions and once planning a policy to preparation TFC RO membranes for maximizing desalination performance. The optimum conditions for the RO process were MPD of 1.75 wt%, aqueous phase immersion time of 5.0 min, TEA of 3.0 wt%, CSA of 1.89 wt%, TMC of 0.26 wt% and organic phase immersion time of 1.0 min. The experimentally obtained flux and rejection efficiency (%) at optimum conditions were equal to 36.3 ± 1.9 and 98.12 ± 0.35%, respectively.