参照前期的研究方法,采用两步一锅法,首先在聚砜(PS)主链上引入活性基团—NCO,紧接着与对羟基苯磺酸钠(HBS)反应制备一种侧链末端为磺酸基团的磺化聚砜(PS-BS),采用流延成膜法制备相应的聚砜阳离子交换膜(PSCEM)。研究温度与PSCEMs吸水率、尺寸稳定性和质子传导率性能之间的关系,由于亲水磺酸基团远离在聚砜主链,能够形成亲水微区远离疏水主链的微相分离结构,使PSCEM在高的吸水率条件下保持较好的尺寸稳定性。在反应时间为15h条件下,制得的PSCEM在25℃和85℃的吸水率为45.1%和52.1%,吸水溶胀率仅为25.1%和55.6%,质子传导率分别为0.077S/cm和0.147S/cm,具有较好的性能。
Isocyanate group was bonded on backbone of polysfulfone(PS) by two steps-“one pot” method according to our previous study method.PS-BS was obtained with 4-hydroxybenzenesulfonic acid sodium as reagent.The PSCEMs were prepared by solution casting method.The relationship between temperature and water absorption,swelling ratio and proton conductivity were explored.Due to the hydrophilic sulfonic acid group was far away from hydrophobic polysulfone main chain,the PSCEM can form micro-phase separation.It leaded to the PSCEM keep excellent size stability at high water absorption.It showed excellent size stability that the swelling ratio of PSCEM were only 25.1% at 25℃ and 55.6% at 85℃ when the water absorption were 45.1% and 52.1% at the same temperature.And the proton conductivity were up to 0.077S/cm and 0.147S/cm respectively.
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基金资助
陕西省自然科学基础研究计划项目(2019JQ-927);陕西国防学院科学研究计划项目(Gfy18-04);2018年西安市科协青年人才托举计划项目(201809)
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