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首页> 外文期刊>Journal of power sources >Block sulfonated poly(ether ether ketone)s (SPEEK) ionomers with high ion-exchange capacities for proton exchange membranes
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Block sulfonated poly(ether ether ketone)s (SPEEK) ionomers with high ion-exchange capacities for proton exchange membranes

机译：质子交换膜具有高离子交换能力的嵌段磺化聚醚醚酮（SPEEK）离聚物

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摘要

A series of block SPEEK copolymers with high ion-exchange capacities (IEC) consisting of hydrophobic and hydrophilic blocks were synthesized successfully. Membranes were cast from their DMF solutions, and characterized by determining the ion-exchange capacity, water uptake, water retention, proton conductivity and thermal properties. Membranes exhibited conductivities from 0.027 to 0.068 S cm~(-1) at 30 deg C and from 0.049 to 0.11S cm~(-1) at 80 deg C; water uptake from 34 percent to 54 percent and IEC from 1.25 to 1.48 mequiv. g~(-1). Block-3 membrane with IEC 1.38 mequiv. g~(-1) showed relatively higher proton conductivity compared to that of a random SPEEK membrane with IEC 1.37 mequiv. g~(-1). The SAXS profiles of block SPEEK copolymers exhibited a well-defined ionomer peak at low angles due to the phase separation between ionic domains and hydrophobic domains. It is believed that their microstructure features attribute to the enhanced proton conductivity of block SPEEK membranes.
机译：成功地合成了由疏水性和亲水性嵌段组成的一系列具有高离子交换容量（IEC）的嵌段SPEEK共聚物。膜由其DMF溶液浇铸而成，并通过确定离子交换能力，吸水率，保水率，质子传导率和热性能进行表征。膜在30摄氏度时的电导率为0.027至0.068 S cm〜（-1），在80摄氏度时的电导率为0.049至0.11 S cm〜（-1）。吸水率从34％到54％，IEC则从1.25到1.48 mequiv。 g〜（-1）。符合IEC 1.38标准的Block-3膜。与IEC 1.37 mequiv的随机SPEEK膜相比，g〜（-1）的质子传导率相对更高。 g〜（-1）。由于离子域和疏水域之间的相分离，嵌段SPEEK共聚物的SAXS轮廓在低角度处显示出明确定义的离聚物峰。据信它们的微结构特征归因于嵌段SPEEK膜的提高的质子传导性。

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