基于双核咪唑盐阴离子交换膜的制备与表征
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摘要
采用两步法合成了双核溴化1-乙烯基-3-(6-(1-丁基咪唑))己基咪唑盐[VBIm HIm][Br]2,并通过1H-NMR对[VBIm HIm][Br]2的化学结构进行了表征;然后将[VBIm HIm][Br]2与苯乙烯、丙烯腈混合均匀后,通过紫外光引发聚合,得到碱性阴离子交换膜。通过傅里叶变换红外光谱对阴离子交换膜的结构进行了表征,并系统对膜的吸水率、溶胀度、热稳定性、力学性能及电导率等进行了研究。研究结果表明,该类阴离子交换膜降解温度达到300℃,[VBIm HIm][Br]2含量为10%的阴离子交换膜25℃时的吸水率为96%,溶胀度只有44%,拉伸强度为38. 32 MPa,最大断裂伸长率可达26. 37%;在80℃时,其离子的电导率可达22 m S/cm,该类阴离子交换膜有望应用于碱性阴离子交换膜燃料电池领域。
Binuclear imidazolium salt,1-vinyl-3-( 6-( 1-butylated imidazole)) hexyl imidazole( [VBImHIm][Br]2),was synthesized and the chemical structure of [VBImHIm][Br]2was characterized by1H-NMR. Alkaline anion-exchange membranes( AEMs) based on [VBImHIm][Br]2were prepared by irradiation with UV light. The structure of the membranes was characterized by FT-IR,and the water uptake,swelling degree,thermal stability,mechanical properties and conductivity of the membranes were systematically studied. These AEMs are thermally stable up to 300℃,the AEM with 10wt% [VBImHIm][Br]2exhibits a high water uptake of 96% and swelling degree of 44% at 25℃. The tensile strength and the elongation at breaks of [VBImHIm][Br]2-10 are 38. 32 MPa and 26. 37%,respectively and its ionic conductivity is up to 22 m S/cm at 80 ℃. All of these results indicate good potential applications in alkaline anion exchange membrane fuel cells.
Binuclear imidazolium salt,1-vinyl-3-( 6-( 1-butylated imidazole)) hexyl imidazole( [VBImHIm][Br]2),was synthesized and the chemical structure of [VBImHIm][Br]2was characterized by1H-NMR. Alkaline anion-exchange membranes( AEMs) based on [VBImHIm][Br]2were prepared by irradiation with UV light. The structure of the membranes was characterized by FT-IR,and the water uptake,swelling degree,thermal stability,mechanical properties and conductivity of the membranes were systematically studied. These AEMs are thermally stable up to 300℃,the AEM with 10wt% [VBImHIm][Br]2exhibits a high water uptake of 96% and swelling degree of 44% at 25℃. The tensile strength and the elongation at breaks of [VBImHIm][Br]2-10 are 38. 32 MPa and 26. 37%,respectively and its ionic conductivity is up to 22 m S/cm at 80 ℃. All of these results indicate good potential applications in alkaline anion exchange membrane fuel cells.
引文
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[3] He G,Li Z,Zhao J,Wang S,et al. Nanostructured ion-exchange membranes for fuel cells:recent advances and perspectives[J]. Adv.Mater.,2015,27:5280-5295.
[4] Kim D J,Park C H,Nam S Y. Characterization of a soluble poly(ether etherketone)anion exchange membrane for fuel cell application[J]. Int. J. Hydrogen Energy,2016,41:7649-7658.
[5] Noonan K J,Hugar K M,Kostalik IV H A,et al. Phosphonium-functionalized polyethylene:a new class of base-stable alkaline anion exchange membranes[J]. J. Am. Chem. Soc.,2012,134:18161-18164.
[6] Zhang M,Liu J,Wang Y,et al. Highly stable anion exchange membranes based on quaternized polypropylene[J]. J. Mater. Chem.,2015,3:12284-12296.
[7] Xiong Y,Liu Q L,Zeng Q H. Quaternized cardo polyetherketone anion exchange membrane for direct methanol alkaline fuel cells[J]. J.Power Sources,2009,193:541-546.
[8] Couture G,Alaaeddine A,Boschet F,et al. Polymeric materials as anion-exchange membranes for alkaline fuel cells[J]. Prog. Polym.Sci.,2011,36:1521-1557.
[9] Lin B,Qiu L,Lu J,et al. Cross-linked alkaline ionic liquid-based polymer electrolytes for alkaline fuel cell applications[J]. Chem.Mater.,2010,22:6718-6725.
[10] Lin X,Varcoe J. R,Poynton S. D,et al. Alkaline polymer electrolytes containing pendant dimethylimidazolium groups for alkaline membrane fuel cells[J]. J. Mater. Chem. A,2013,1:7262-7269.
[11] Ouadah A,Xu H,Luo T,et al. A series of poly(butylimidazolium)ionic liquid functionalized copolymers for anion exchange membranes[J]. J. Power Sources,2017,371:77-85.
[12] Guo D,Lin C,Hu E,et al. Clustered multi-imidazolium side chains functionalized alkaline anion exchange membranes for fuel cells[J]. J. Membr. Sci.,2017,541:214-223.
[13] Han J,Zhu L,Pan J,et al. Elastic long-chain multication crosslinked anion exchange membranes[J]. Macromolecules,2017,50:3323-3332.
[14] Feng T,Lin B,Zhang S,et al,Imidazolium-based organicinorganic hybrid anion exchange membranes for fuel cell applications[J]. J. Membr. Sci.,2016,508:7-14.
[15]赵亚梅,李春阳,郑长征,等.溴化1-乙烯基-3-正丁基咪唑功能化离子液体的合成及其聚合性、导电性等研究[J].应用化工,2015,44(6):1163-1167.Zhao Y M,Li C Y,Zheng C Z,et al. Study on synthesis,polymerizability and conductivity of 1-vinyl-3-n-butylimidazole bromide[J].Applied Chemical Industry,2015,44(6):1163-1167.
[16] Lin B,Qiao G,Chu F,et al. Preparation and characterization of imidazoliumbased membranes for anion exchange membrane fuel cell applications[J]. Int. J. Hydrogen Energy,2017,42:6988-6996.