Effect of carboxylation modification on pore structure and properties of PAN thermal crosslinking membrane

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Abstract As a thermoplastic material, polyacrylonitrile asymmetric membrane will undergo thermal melting in the process of thermal cross-linking, resulting in pore melting. In this paper, polyacrylonitrile-based asymmetric (PAN) membranes were prepared by non-solvent phase transformation (NIPS) method. Carboxylated PAN-based thermally crosslinked (H-TPAN) membranes with rich sponge and finger pores were prepared by NaOH alkaline hydrolysis process. The effects of NaOH concentration on the structure and properties of PAN and post-treated membranes were studied. The results show that the modification of PAN membrane by carboxylation can promote cyclization and oxidation of cyanide groups in the thermal crosslinking stage, improve the cross-linking degree of H-TPAN membrane, avoid the thermal fusion of membrane pores at high temperature, and maintain the flux of PAN thermal crosslinking membrane. The best carboxylation conditions of PAN membrane in the process of thermal crosslinking are as follows: NaOH concentration 0.4 mol·L^-1, carboxylation time 1 h, carboxylation temperature 60 ℃. At the same time, the carboxylated modified membrane showed excellent thermal stability and good solubility resistance.

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	Articles by authors
	CHEN Fang
	WANG Lei
	LI Lin
	ZHANG Xiaolu
	RONG Yuefei
	SUN Haojing
	ZHANG Yongyue
	WANG Tonghua

Keywords： polyacrylonitrile thermal crosslinking pore structure carboxylation

Received 2022-12-16;

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Corresponding Authors: 李琳,教授,E-mail:lilin121@dlut.edu.cn。 Email: lilin121@dlut.edu.cn

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CHEN Fang, WANG Lei, LI Lin, ZHANG Xiaolu, RONG Yuefei, SUN Haojing, ZHANG Yongyue, WANG Tonghua.Effect of carboxylation modification on pore structure and properties of PAN thermal crosslinking membrane[J] Chemcial Industry and Engineering, 2023,V40(3): 48-54

[1] 肖长发, 刘振. 膜分离材料应用基础[M]. 北京:化学工业出版社, 2014
[2] YOON K, HSIAO B S, CHU B. High flux nanofiltration membranes based on interfacially polymerized polyamide barrier layer on polyacrylonitrile nanofibrous scaffolds[J]. Journal of Membrane Science, 2009, 326(2):484-492
[3] FENG C, XU J, LI M, et al. Studies on a novel nanofiltration membrane prepared by cross-linking of polyethyleneimine on polyacrylonitrile substrate[J]. Journal of Membrane Science, 2014, 451:103-110
[4] PENG Y, GUO F, WEN Q, et al. A novel polyacrylonitrile membrane with a high flux for emulsified oil/water separation[J]. Separation and Purification Technology, 2017, 184:72-78
[5] TSAI H A, WANG T, HUANG S H, et al. The preparation of polyamide/polyacrylonitrile thin film composite hollow fiber membranes for dehydration of ethanol mixtures[J]. Separation and Purification Technology, 2017, 187:221-232
[6] LI W, YANG Z, ZHANG G, et al. Stiff metal-organic framework-polyacrylonitrile hollow fiber composite membranes with high gas permeability[J]. Journal of Materials Chemistry A, 2014, 2(7):2110-2118
[7] ZHANG Y, GUAN J, WANG X, et al. Balsam-pear-skin-like porous polyacrylonitrile nanofibrous membranes grafted with polyethyleneimine for postcombustion CO₂ capture[J]. ACS Applied Materials & Interfaces, 2017, 9(46):41087-41098
[8] HU L Q, CHENG J, LI Y, et al. In-situ grafting to improve polarity of polyacrylonitrile hollow fiber-supported polydimethylsiloxane membranes for CO₂ separation[J]. Journal of Colloid and Interface Science, 2018, 510:12-19
[9] ROY A, DADHICH P, DHARA S, et al. In vitro cytocompatibility and blood compatibility of polysulfone blend, surface-modified polysulfone and polyacrylonitrile membranes for hemodialysis[J]. RSC Advances, 2015, 5(10):7023-7034
[10] ZHAO R, LI Y, LI X, et al. Facile hydrothermal synthesis of branched polyethylenimine grafted electrospun polyacrylonitrile fiber membrane as a highly efficient and reusable bilirubin adsorbent in hemoperfusion[J]. Journal of Colloid and Interface Science, 2018, 514:675-685
[11] WANG Z, WAN L, XU Z. Surface engineerings of polyacrylonitrile-based asymmetric membranes towards biomedical applications:An overview[J]. Journal of Membrane Science, 2007, 304(1/2):8-23
[12] DAI Z, WAN L, XU Z. Surface glycosylation of polyacrylonitrile ultrafiltration membrane to improve its anti-fouling performance[J]. Journal of Membrane Science, 2008, 325(1):479-485
[13] YAO Y, LIN Z, LI Y, et al. Superacidic electrospun fiber-nafion hybrid proton exchange membranes[J]. Advanced Energy Materials, 2011, 1(6):1133-1140
[14] KIM T A, JO W H. Synthesis of nonfluorinated amphiphilic rod-coil block copolymer and its application to proton exchange membrane[J]. Chemistry of Materials, 2010, 22(12):3646-3652
[15] LEE S Y, OGAWA A, KANNO M, et al. Nonhumidified intermediate temperature fuel cells using protic ionic liquids[J]. Journal of the American Chemical Society, 2010, 132(28):9764-9773
[16] 徐又一, 徐志康. 高分子膜材料[M]. 北京:化学工业出版社, 2005
[17] 丁玲华, 金鑫, 李琳, 等. 预氧化对聚丙烯腈膜结构及性能的影响研究[J]. 膜科学与技术, 2015, 35(2):1-6 DING Linghua, JIN Xin, LI Lin, et al. Effect of preoxidation on the morphology and performance of polyacrylonitrile membrane[J]. Membrane Science and Technology, 2015, 35(2):1-6(in Chinese)
[18] JIN X, LI L, XU R, et al. Effects of thermal cross-linking on the structure and property of asymmetric membrane prepared from the polyacrylonitrile[J]. Polymers, 2018, doi:10.3390/polym10050539
[19] BARBARI TIMOTHY A. Basic principles of membrane technology[J]. Journal of Membrane Science, 1992, 72(3):304-305
[20] CHERAGHALI R, MAGHSOUD Z. Enhanced modification technique for polyacrylonitrile UF membranes by direct hydrolysis in the immersion bath[J]. Journal of Applied Polymer Science, 2020, doi:10.1002/app.48583
[21] GUPTA A K, PALIWAL D K, BAJAJ P. Acrylic precursors for carbon fibers[J]. Polymer Reviews, 1991, 31(1):1-89