原位离子交联聚电解质络合物纳滤膜的制备与表征

doi:10.3981/j.issn.1000-7857.2015.14.016

摘要
图/表
参考文献
相关文章 (2)

全文: PDF (2680 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要为获得高渗透选择性的聚电解质络合物纳滤膜(PECNFMs),以聚乙烯亚胺(PEI),海藻酸钠(SA)和羧甲基纤维素钠(CMC)为原料,通过原位离子交联的方式制备了一系列新型PECNFMs。分别采用傅里叶变换红外光谱(ATR-FTIR),场发射扫描电镜(SEM)和接触角实验(CA)对PECNFMs 的化学组成、结构和亲水性进行表征。考查聚电解质的配比、聚阴离子的种类、无机盐的种类及操作温度等因素对PECNFMs 性能的影响。结果表明,当PEI 质量比相同时,PEI/SA 原位离子交联PECNFMs 较PEI/CMC 膜具有更高的水通量;且随着PEI 质量比的增加,PECNFMs 的荷电性由荷负电转变为荷正电;当PEI 质量比为0.9 时(PEI/SA 0.9)具有最佳的纳滤分离性能,其对MgCl2的截留率为94.0%,水通量为13.4 L·m^-2·h^-1(在25℃和0.6 MPa下,对1 g·L^-1 MgCl₂水溶液进行测试),表现出较高的Na⁺/Mg²⁺分离性能(分离因子为10.4)。采用原位离子交联法,成功制备了高渗透选择性的新型PECNFMs,该方法具有一定的普适性,为高性能纳滤膜的制备开辟了新途径。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	赵凤阳
	计艳丽
	安全福
	高从堦

关键词 ：聚电解质络合物, 纳滤膜, 原位离子交联, 水软化

Abstract：In order to obtain high water flux and salt rejection polyelectrolyte complex nanofiltration membranes (PECNFMs), a novel type of PECNFMs is prepared with the polyethyleneimine (PEI), the sodium alginate (SA) and the carboxymethyl cellulose (CMC) via the in-situ ionic cross-linking method. The chemical compositions, structures, and hydrophilicity of the PECNFMs are characterized by the Fourier transform infrared spectroscopy (FTIR), the field emission scanning electron microscope (FESEM), and the water contact angle (CA), respectively. The effects of the PEI mass ratios, the polyanionic types, the feed inorganic salts, and the operating temperature on the nanofiltration performance of the PECNFMs are investigated. It is shown that the in-situ ionic cross-linking PEI/ SA PECNFMs enjoy a higher water flux as compared to the PEI/CMCs with the some PEI mass ratio, and the surface charge of the PECNFMs could be turned from negative to positive by increasing the PEI mass ratio. With the optimized PEI/SA value of 0.9, a water flux of 13.4 L·m^-2·h^-1 is obtained with the MgCl₂ rejection being maintained at around 94.0% (with 1 g·L^-1 aqueous MgCl₂ solution at 25℃ and 0.6 MPa). Moreover, with the PEI/SA value of 0.9, the best Na⁺/Mg²⁺ selectivity (α_Mg²⁺^Na⁺=10.4) is secured. This study provides an approach for fabricating PECNFMs with high water flux and salt rejection via an in-situ ionic cross-linking method and opens new avenues for fabricating high performance nanofiltration membranes.

Key words： polyelectrolyte complex nanofiltration in-situ ionic cross-linking water softening

收稿日期: 2015-05-01

ZTFLH:

TQ028.8

基金资助:国家自然科学基金青年项目(21306163);中国博士后科学基金特别资助项目(2014T70575)

通讯作者: 安全福(通信作者),教授,研究方向高分子分离膜,电子信箱:anqf@zju.edu.cn E-mail: anqf@zju.edu.cn

作者简介: 赵凤阳,博士研究生,研究方向为纳滤膜,电子信箱:zhaofengyang@zju.edu.cn

引用本文:

赵凤阳, 计艳丽, 安全福, 高从堦. 原位离子交联聚电解质络合物纳滤膜的制备与表征[J]. 科技导报, 2015, 33(14): 87-92.
ZHAO Fengyang, JI Yanli, AN Quanfu, GAO Congjie. Fabrication and performance of in-situ ionic cross-linking polyelectrolyte complex nanofiltration membranes. Science & Technology Review, 2015, 33(14): 87-92.

链接本文:

http://www.kjdb.org/CN/10.3981/j.issn.1000-7857.2015.14.016 或 http://www.kjdb.org/CN/Y2015/V33/I14/87

[1] Ghizellaoui S, Taha S, Dorange G, et al. Softening of hamma drinking water by nanofiltration and by lime in the presence of heavy metals[J]. Desalination, 2004, 171(2): 133-138.
[2] 计艳丽, 安全福, 钱锦文, 等. 聚电解质层层自组装纳滤膜[J]. 化学进展, 2010, 22(1): 119-124. Ji Yanli, An Quanfu, Qian Jinwen, et al. Nanofiltration membranes prepared by layer-by-layer self-assembly of polyelectrolyte[J]. Progress in Chemistry, 2010, 22(1): 119-124.
[3] Zhao Q, Ji Y L, Wu J K, et al. Polyelectrolyte complex nanofiltration membranes: Performance modulation via casting solution pH[J]. RSC Advances, 2014, 95(4): 52808-52814.
[4] Magnenet C, Lakard S, Buron C C, et al. Functionalization of organic membranes by polyelectrolyte multilayer assemblies: Application to the removal of copper ions from aqueous solutions[J]. Journal of Colloid and Interface Science, 2012, 376(1): 202-208.
[5] Rajabzadeh S, Liu C, Shi L, et al. Preparation of low-pressure water softening hollow fiber membranes by polyelectrolyte deposition with two bilayers[J]. Desalination, 2014, 344(1): 64-70.
[6] Zhao Q, An Q F, Ji Y L, et al. Polyelectrolyte complex membranes for pervaporation, nanofiltration and fuel cell applications[J]. Journal of Membrane Science, 2011, 379(1/2): 19-45.
[7] Ji Y L, An Q F, Zhao F Y, et al. Fabrication of chitosan/PDMCHEA blend positively charged membranes with improved mechanical properties and high nanofiltration performances[J]. Desalination, 2015, 357(2): 8-15.
[8] 杜瑞奎, 高保娇, 李延斌, 等. 聚砜阴离子交换膜的制备及结构与性能研究[J]. 高分子学报, 2010(7): 924-931. Du Ruikui, Gao Baojiao, Li Yanbin, et al. Preparation and structure/ property relationship of polysulfone anion- exchange membranes[J]. Acta Polymerica Sinica, 2010(7): 924-931.
[9] Zhao Q, Qian J W, An Q F, et al. Synthesis and characterization of soluble chitosan/sodium carboxymethyl cellulose polyelectrolyte complexes and the pervaporation dehydration of their homogeneous membranes[J]. Journal of Membrane Science, 2009, 333(1/2): 68-78.
[10] Simsek- Ege F A, Bond G M, Stringer J. Polyelectrolye complex formation between alginate and chitosan as a function of pH[J]. Journal of Applied Polymer Science, 2003, 88(2): 346-351.
[11] Li M M, Xu J, Chang C Y, et al. Bioinspired fabrication of composite nanofiltration membrane based on the formation of DA/PEI layer followed by cross-linking[J]. Journal of Membrane Science, 2014, 459 (1): 62-71.
[12] Ji Y L, An Q F, Zhao Q, et al. Preparation of novel positively charged copolymer membranes for nanofiltration[J]. Journal of Membrane Science, 2011, 376(1/2): 254-265.
[13] Cheng C, Yaroshchuk A, Bruening M L. Fundamentals of selective ion transport through multilayer polyelectrolyte membranes[J]. Langmuir, 2013, 29(6): 1885-1892.
[14] Goosen M F A, Sablani S S, Al-Maskari S S, et al. Effect of feed temperature on permeate flux andmass transfer coefficient in spiralwound reverse osmosis systems[J]. Desalination, 2002, 144(1-3): 367- 372
[15] Manttari M, Pihlajamaki A, Kaipainen E, et al. Effect of temperature and membrane pre-treatment by pressure on the filtration properties of nanofiltration membranes[J]. Desalination, 2002, 145(1-3): 81-86.
[16] Du R H, Zhao J S. Properties of poly (N, N-dimethylaminoethyl methacrylate)/polysulfone positively charged composite nano fi ltration membrane[J]. Journal of Membrane Science, 2004, 239(2): 183-188.
[17] Huang R H, Chen G H, Sun M K, et al. Preparation and characterization of quaterinized chitosan/poly(acrylonitrile) composite nano fi ltration membrane from anhydride mixture cross- linking[J]. Separation and Purification Technology, 2008, 58(3): 393-399.
[18] Huang R H, Chen G H, Sun M K, et al. Studies on nanofiltration membrane formed by diisocyanate cross-linking of quaternized chitosan on poly(acrylonitrile) (PAN) support[J]. Journal of Membrane Science, 2006, 286(1/2): 237-244.
[19] Dong X, Li S H, Zhang Q F, et al. Preparation and characterization of novel positively charged copolymer composite membranes for nanofiltration[J]. RSC Advances, 2014, 43(4): 22625-22631.
[20] Jin W Q, Toutianoush A, Tieke B. Use of polyelectrolyte layer-bylayer assemblies as nanofiltration and reverse osmosis membranes[J]. Langmuir, 2003, 19(7): 2550-2553.
[21] Ouyang L, Malaisamy R, Bruening M L. Multilayer polyelectrolyte films as nanofiltration membranes for separating monovalent and divalent cations[J]. Journal of Membrane Science, 2008, 310(1/2): 76-84.