膜科学与技术

过硫酸铵/PDA-PEI层层自组装法制备选择性阳离子交换膜

作者：张斌，刘杰，纪志永，汪婧，赵颖颖，薛文，岳长虹，袁俊生

单位： 1.河北工业大学化工学院，天津 300130；2.宣化钢铁集团有限责任公司设备能源部, 河北宣化 075100；3.泉州师范学院化工与材料学院，福建泉州 362000

关键词：聚多巴胺；聚乙烯亚胺；层层自组装；阳离子交换膜；选择透过性

出版年,卷(期):页码： 2023,43(2):80-86

摘要：

针对多巴胺聚合速率较慢的问题，以过硫酸铵为氧化剂，诱导多巴胺快速聚合。以此为基础，采用多巴胺与聚乙烯亚胺层层自组装法制备具有单双价阳离子选择分离功能的离子交换膜。考察了过硫酸铵氧化多巴胺聚合过程影响，以及不同改性层数对阳离子交换膜性能的影响。结果显示，过硫酸铵的加入可较大地加快氧化过程，且对膜选择性无影响；改性层数为5层时，复合膜对Mg2+与Na+具有较高的选择性(p（Na+/Mg2+）=6.92)，5层改性膜膜面电阻为为3.36 Ω·cm2。说明改性膜具有较好的实用价值。

Ammonium persulfate was used as the oxidant to improve the polymerization of dopamine in this paper. And the mono-valent ion selective cation exchange membrane was prepared by layer-by-layer self-assembly of dopamine and polyethyleneimine. The effect of ammonium persulfate on the oxidation process of dopamine polymerization and the effect of modified layers number on the membrane performance were investigated. The results show that ammonium persulfate could accelerate the oxidation process obviously and has little effect on the membrane selectivity. When the number of modified layers is 5, the composite membrane has higher selectivity to Mg2+ and Na+ (p(Na+/Mg2+)=6.92), and the membrane surface resistance was lower (R(Na+=3.36Ω·cm2) ).

张斌（1996-），男，山东泰安人，硕士，从事方向为膜材料与膜改性方面的研究

参考文献：

[1] Valery F, Barceló A, Arbós R. Electrodialysis technology: Theory and applications[J]. Desalination, Trends and Technologies, 2011, 28: 3-20.
[2] Sata T. Studies on ion exchange membranes with permselectivity for specific ions in electrodialysis[J]. Journal of Membrane Science, 1994, 93(2): 117-135.
[3] 逄霄. 基于表面改性的单价选择性阳离子交换膜性能强化研究[D]. 浙江工业大学, 2020.
[4] 陶彩虹, 马阜生, 刘宝勇, 等. 基于聚多巴胺的表面改性方法研究现状[J]. 化学通报, 2015, 78(11): 983-990.
[5] Wei Q, Zhang F, Li J, et al. Oxidant-induced dopamine polymerization for multifunctional coatings[J]. Polymer Chemistry, 2010, 1(9): 1430-1433.
[6] Proner M C, Ramalho M I, Ambrosi A, et al. Impact of MWCO and dopamine/polyethyleneimine concentrations on surface properties and filtration performance of modified membranes[J]. Membranes, 2020, 10(9): 239.
[7] Qiu W Z, Yang H C, Xu Z K. Dopamine-assisted co-deposition: An emerging and promising strategy for surface modification[J]. Advances in Colloid and Interface Science, 2018, 256: 111-125.
[8] 周蓉, 任鹏飞, 徐志康. 预处理对聚多巴胺改性聚丙烯微滤膜性能影响研究[J]. 膜科学与技术, 2015, 35(1):56-63.
[9] Li H, Peng L, Luo Y, et al. Enhancement in membrane performances of a commercial polyamide reverse osmosis membrane via surface coating of polydopamine followed by the grafting of polyethylenimine[J]. RSC Advances, 2015, 5(119): 98566-98575.
[10] Shi H, Xue L, Gao A, et al. Fouling-resistant and adhesion-resistant surface modification of dual layer PVDF hollow fiber membrane by dopamine and quaternary polyethyleneimine[J]. Journal of Membrane Science, 2016, 498: 39-47.
[11] Pang X, Tao Y, Xu Y, et al. Enhanced monovalent selectivity of cation exchange membranes via adjustable charge density on functional layers[J]. Journal of Membrane Science, 2020, 595: 117544.
[12] Qiu W Z, Yang H C, Xu Z K. Dopamine-assisted co-deposition: An emerging and promising strategy for surface modification[J]. Advances in Colloid and Interface Science, 2018, 256: 111-125.
[13] 苏婉,张文娟,张宇峰.PDA与PEI共沉积和分步沉积方法对纳滤膜性能的影响[J].膜科学与技术,2020,40(3):14-21.
[14] Yang H C, Wu M B, Li Y J, et al. Effects of polyethyleneimine molecular weight and proportion on the membrane hydrophilization by codepositing with dopamine[J]. J Appl Polym Sci, 2016, 133(32).
[15] Hao L, Chi Z, Wang J. Co-deposition of hyperbranched polyethyleneimine and dopamine on anion exchange membrane for improved antifouling performance[J]. Journal of Membrane Science, 2021, 640: 119811.
[16] Zhang W, Ma J, Wang P, et al. Investigations on the interfacial capacitance and the diffusion boundary layer thickness of ion exchange membrane using electrochemical impedance spectroscopy[J]. Journal of Membrane Science, 2016, 502: 37-47.
[17] Lee H J, Choi J H, Cho J, et al. Characterization of anion exchange membranes fouled with humate during electrodialysis[J]. Journal of Membrane Science, 2002, 203(1/2): 115-126.
[18] Yang J, Elllnor P T, Sather W A, et al. Molecular determinants of Ca2+ selectivity and ion permeation in L-type Ca2+ channels[J]. Nature, 1993, 366(6451): 158-161.
[19] Xi Z Y, Xu Y Y, Zhu L P, et al. A facile method of surface modification for hydrophobic polymer membranes based on the adhesive behavior of poly (DOPA) and poly (dopamine)[J]. Journal of Membrane Science, 2009, 327(1/2): 244-253.

服务与反馈：

【文章下载】【加入收藏】

《膜科学与技术》编辑部地址：北京市朝阳区北三环东路19号蓝星大厦邮政编码：100029 电话：010-64426130/64433466 传真：010-80485372邮箱：mkxyjs@163.com