Ether bond bridged polysulfone sulfonated polyether sulfone, and preparation method and application thereof

The invention discloses ether bond bridged polysulfone sulfonated polyether sulfone, and a preparation method of ether bond bridged polysulfone sulfonated polyether sulfone and a method for preparinga proton exchange membrane prepared from ether bond bridged polysulfone sulfonated polyether sulfone. A repeating unit of ether bond bridged polysulfone sulfonated polyether sulfone comprises at leasttwo ether bond bridged sulfone groups, the sulfonic acid groups are more concentrated, and the existence of sulfone groups can further reduce the proton conductivity of benzene rings in which the sulfonic acid groups are located, and increase the proton conductivity and hydrolysis resistance stability of the proton exchange membrane. The polymer obtained by the invention has higher molecular weight, excellent solubility and high thermal stability; the ether bond bridged polysulfone sulfonated polyether sulfone is simple in preparation process, easy to control reaction conditions and suitablefor industrial production.