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联苯酚基聚芳酯疏松纳滤膜的制备及其性能

作者：常国梁，龚耿浩

单位：天津工业大学材料科学与工程学院，分离膜与膜过程国家重点实验室，天津 300387

关键词： 2,2'-联苯酚；疏松纳滤；聚芳酯复合膜；染料截留；脱盐

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出版年,卷(期):页码： 2023,43(1):74-82

摘要：

设计合成了具有非平面构型的6,6'-OH-2,2'-BIPOL单体，将其与均苯三甲酰氯（TMC）在聚丙烯腈（PAN）基膜表面界面聚合，制备了2,2'-联苯酚基聚芳酯（hydroxyl-BIPOL/PAN）疏松纳滤复合膜。考察了界面聚合时间对hydroxyl-BIPOL/PAN复合膜形貌以及分离性能的影响。结果表明，基于2,2'-联苯酚基聚芳酯（hydroxyl-BIPOL/TMC）分离层独特的非平面构型，该复合膜表现出高的纯水渗透通量和对盐/染料的优异筛分性能。hydroxyl-BIPOL/PAN-5复合膜的纯水渗透通量高达62.9 L m-2 h-1 bar-1，对碱性蓝26染料的截留率为99.7%，对MgSO4的截留率仅为16.9%。证实了2,2'-联苯酚基衍生物适用于制备高渗透选择性疏松纳滤膜，拓展了用于制备下一代高性能薄层复合（TFC）纳滤膜的预聚物单体的设计思路。

A high-flux loose nanofiltration (LNF) membrane was fabricated by synthesizing 6,6'-OH-2,2'-BIPOL with a non-planar configuration as aqueous phase monomer to react with trimesoyl chloride (TMC) via interfacial polymerization on a polyacrylonitrile (PAN) ultrafiltration membrane. The separation layer of 2,2'-biphenol-based polyarylate (hydroxyl-BIPOL/TMC) possessed a loose structure due to its unique non-planar configuration. The effect of interfacial polymerization time on the morphology and the separation performance of this hydroxyl-BIPOL/PAN composite membrane was investigated. The hydroxyl-BIPOL/PAN-5 composite membrane exhibited high pure water permeation flux of 62.9 L m-2 h-1 bar-1 and excellent sieving performance for salts/dyes (the rejections of BB26 dye and MgSO4 were 99.7% and 16.9%, respectively). It is confirmed that 2,2'-biphenol-based derivatives are suitable for the preparation of the LNF membranes with a high permselectivity, which expands the design ideas of prepolymer monomers for the preparation of next-generation high-performance thin-film composite LNF membranes.

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作者简介：

常国梁（1993-），男，河北张家口人，硕士生，研究方向为先进膜材料、膜分离技术，E-mail：cgl92411@163.com.

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