Polysulfone and biphenyl type sulfonated polyether sulfone as well as preparation method and application thereof

The invention discloses a polysulfone biphenyl sulfonated polyether sulfone, a preparation method thereof and a method for preparing a proton exchange membrane from polysulfone biphenyl sulfonated polyether sulfone. Polysulfone biphenyl sulfonated polyether sulfone is structurally characterized in that a repetitive unit of polysulfone biphenyl sulfonated polyether sulfone contains at least two sulfone groups bridged by biphenyl groups, and sulfonic groups with higher acidity can be introduced into benzene rings connected with the sulfone groups. The obtained polymer has higher molecular weightand good solubility; the preparation process is simple, reaction conditions are easy to control and the method is suitable for industrial production. The proton exchange membrane prepared from polysulfone biphenyl sulfonated polyether sulfone has higher proton conductivity and good fuel cell performance, thereby having potential application prospect. 本发明公开了种多砜基联苯型磺化聚醚砜及其制备方法以及应用其制备质子交换膜的方法，其结构特征为这种多砜基联苯型磺化聚醚砜的重复单元中含有至少两个