多嵌段磺化聚醚砜质子交换膜材料的制备及性能研究  

Preparation and properties of multi-lock sulfonated polyethersulfone proton exchange membrane materials

作　　者：谢伟芳[1] XIE Weifang(School of Environment and Ecology,Jiangsu Open University,Nanjing 210036,China)

机构地区：[1]江苏开放大学环境与生态学院,南京210036

出　　处：《膜科学与技术》2018年第6期63-68,75,共7页Membrane Science and Technology

基　　金：江苏省高等学校自然科学研究面上项目(17KJB610002);江苏省环境工程重点实验室科研开放基金课题(KF2015005);江苏省环境工程重点实验室科研开放基金课题(KF2015013)

摘　　要：制备出一系列磺化度为44.6%、49.7%和54.4%的磺化-非磺化四嵌段聚芳醚砜材料,并将其用于直接甲醇燃料电池的质子交换膜.这种四嵌段聚芳醚砜薄膜具有互穿网络微观结构,亲-疏水相分离尺度较小.与具有类似结构的两嵌段聚芳醚砜相比,其质子传导相关性能更为优异.随温度和磺化度升高,所制备的质子交换膜的吸水率、甲醇透过率、离子交换容量和质子传导率均有所升高.当温度为90℃,磺化度为54.4%时,相应薄膜的质子传导率较高,为9.38mS/cm,且甲醇透过率依然较低,仅为3.80×10-8 L/m·s.A series of multi-block sulfonated polyethersulfones with various sulfonation degrees of 44.6%,49.7% and 55.4% have been synthesized and used as proton exchange membranes in direct methanol fuel cells.Interpenetrating networks were observed in these four-block sulfonated polyethersulfone membranes.As a result,compared with a two-block sulfonated polyethersulfone,these four-block sulfonated polyethersulfone membranes exhibited improved proton conduction performance.As the temperature and sulfonation degree increased,the water absorption,methanol transmittance,ion-exchange capacity and proton conductivity of the proton exchange membranes also increased.When the temperature was 90 ℃,and using the material with a sulfonation degree of 54.4%,the proton conductivity of the corresponding membrane was as high as 9.38×10^-3 S/cm,and the methanol transmittance was as low as3.80×10^-8 L/m·s.

关 键 词：多嵌段聚合物 聚醚砜 质子交换膜 甲醇燃料电池 

分 类 号：O633.3[理学—高分子化学]