Sulfonation of poly (phthalazinones) with fuming sulfuric acid mixtures for proton exchange membrane materials
Sulfonation of poly (phthalazinones) with fuming sulfuric acid mixtures for proton exchange membrane materials
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DOI：
10.1016/j.memsci.2003.08.020
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发表时间：
2003-12-15
影响因子：
9.5
通讯作者：
Kaliaguine, S
中科院分区：
文献类型：
--
作者：
Gao, Y;Robertson, GP;Kaliaguine, S
作为一类新型的燃料电池质子交换膜(PEM)材料，通过对磺化聚二氮杂萘酮(PPS)进行改性，制备了磺化聚二氮杂萘酮(SPPES)、磺化聚二氮杂萘酮(SPPEKs)和磺化聚二氮杂萘酮(SPPESKs)。以95-98%浓硫酸和27-33%发烟硫酸为原料，采用不同的酸比，在室温下进行磺化反应，得到磺化度在1.00-1.37范围内的磺化产物。FT-IR分析证实了磺酸基的存在，核磁共振表征了取代度和结构。磺酸基的引入降低了聚合物的分解温度。膜由SPPS溶液在N，N-二甲基乙酰胺(DMAc)中浇铸而成。SPPS膜的吸水率和溶胀率随取代度和温度的升高而增大。所有SPP的质子电导率都随着取代度和温度的升高而增加，在取代度为1.0时达到10(-2)S厘米(-1)以上。(C)2003爱思唯尔B.V.保留所有权利。
As a novel class of proton exchange membrane (PEM) materials for use in fuel cells, sulfonated poly(phthalazinones) (SPPs), including sulfonated poly(phthalazinone ether sulfones) (SPPESs), sulfonated poly(phthalazinone ether ketones) (SPPEKs) and sulfonated poly(phthalazinone ether sulfone ketones) (SPPESKs), were prepared by modification of corresponding poly(phthalazinones) (PPs). Sulfonation reactions were conducted at room temperature using mixtures of 95-98% concentrated sulfuric acid and 27-33% fuming sulfuric acid with different acid ratios in order to get SPPs with degree of sulfonation (DS) in the desired range of 1.00-1.37. The presence of sulfonic acid groups in SPPs was confirmed by FT-IR analysis, and the DS and structures were characterized by NMR. The introduction of sulfonic groups into the polymer chains led to a decrease in the decomposition temperature. Membrane films were cast from SPPs solution in N,N-dimethylacetamide (DMAc). Water uptakes and swelling ratios of SPPs membrane films increased with DS and temperature. Proton conductivities of all SPPs increased with DS and temperature, reaching higher than 10(-2) S cm(-1) at around DS 1.0. (C) 2003 Elsevier B.V. All rights reserved.