Synthesis of Soluble Poly(arylene ether sulfone) Ionomers with Pendant Quaternary Ammonium Groups for Anion Exchange Membranes
Synthesis of Soluble Poly(arylene ether sulfone) Ionomers with Pendant Quaternary Ammonium Groups for Anion Exchange Membranes
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用于阴离子交换膜的带有季铵侧基的可溶性聚（亚芳基醚砜）离聚物的合成
DOI：
10.1021/ma901606z
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发表时间：
2009-11-24
期刊：
影响因子：
5.5
通讯作者：
Zhang, Suobo
中科院分区：
文献类型：
--
作者：
Wang, Junhua;Zhao, Zhuo;Zhang, Suobo
以二甲胺、甲醛和4，4‘-联苯酚为原料，通过Mannich反应合成了一种新的双酚单体--2，2’-二甲氨基亚甲基-4，4‘-联苯酚(DABP)。以DABP、4，4‘-联苯酚和3，3’，4，4‘-四氟二苯基为原料，通过共聚反应，再与碘甲烷反应，合成了新型部分氟化季铵盐型聚芳醚砜S。所得高相对分子质量的共聚物PSQNI-x(x表示原料中DABP的摩尔分数)在极性非质子溶剂中表现出优异的溶解性，因此，可以从DMAc溶液中浇铸制备不同离子含量的PSQNI-x柔性膜和韧性膜。将PSQNI-x与1N-NaOH进行阴离子交换，制得新型阴离子交换膜PSQNOH-x。所有PSQNOH-x膜的室温电导率都在10(-2)S cm(-1)以上，例如PSQNOH90的氢氧化物电导率达到8.4×10(-2)S cm(-1)，与Nafion117的质子电导率(即9.0×10(-2)S cm(-1))相当。
A new bisphenol monomer, 2,2'-dimethylaminemetllylene-4,4'-biphenol (DABP), was easily prepared by Mannich reaction of dimethylamine and formaldehyde with 4,4'-biphenol. Novel partially fluorinated poly(arylene ether sulfone)s with pendant quaternary ammonium groups were prepared by copolymerization of DABP, 4,4'-biphenol, and 3,3',4,4'- tetrafluorodiphenylsulfone, followed by reaction with iodomethane. The resulting copolymers PSQNI-x (where x represents the molar fraction of DABP in the feed) with high molecular weight exhibited outstanding solubility in polar aprotic solvents; thus, the flexible and tough membranes of PSQNI-x with varying ionic content could be prepared by casting from the DMAc solution. Novel anion exchange membranes, PSQNOH-x, were obtained by an anion exchange of PSQNI-x with 1 N NaOH. All PSQNOH-x membranes showed conductivities above 10(-2) S cm(-1) at room temperature, for example, the hydroxide conductivity of PSQNOH-90 achieved to 8.4 x 10(-2) S cm(-1), which was thus comparable to the proton conductivity of Nafion 117 (i.e., 9.0 x 10(-2) S cm(-1)).