Preparation method and application of branched polyarylpiperidine film containing polyaromatic ring units

By introducing rigid polyaryl piperidine branching units into the polymer backbone, branched polyaryl piperidine membranes were prepared, solving the problems of low conductivity and high swelling ratio of linear polyaryl piperidine membranes. This achieved a balance between high conductivity and low swelling ratio, improving the performance of fuel cells and water electrolysis for hydrogen production.

CN122404641APending Publication Date: 2026-07-17SHANDONG HAIHUA GRP CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
SHANDONG HAIHUA GRP CO LTD
Filing Date
2026-06-11
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing linear polyarylepiperidine membranes exhibit low conductivity and high swelling ratio in alkaline environments, making it difficult to balance high conductivity with low swelling ratio, resulting in insufficient performance in hydrogen-oxygen fuel cells and water electrolysis for hydrogen production.

Method used

Rigid polyaryl piperidine membranes were prepared by introducing rigid polyaryl ring branching units into the polymer backbone, forming micropores through random copolymerization, improving ionic conductivity, and simplifying the synthesis process through iodomethane quaternization reaction.

Benefits of technology

A balance between high ionic conductivity and low swelling ratio was achieved, improving the performance of fuel cells and hydrogen production by water electrolysis. The membrane conductivity increased from 115.7 mS/cm to 146.2-149.7 mS/cm, and the power density and current density were significantly improved.

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Abstract

The application discloses a branched polyarylpipeidine film containing a multi-aromatic ring unit and a preparation method and application thereof, and belongs to the technical field of fuel cells and anion exchange membranes for hydrogen production by water electrolysis. The branched polyarylpipeidine main chain is constructed by introducing a multi-aromatic ring branched unit with multiple reaction sites into a conventional linear polyarylpipeidine main chain, so that the packing density of the main chain is reduced, the formation of ion clusters is facilitated, and the membrane conductivity is improved. The branching degree can be controlled by flexibly adjusting the feeding of the multi-aromatic ring branched monomer. The conductivity of the branched polyarylpipeidine film is improved by more than 26% compared with that of the linear film, and the branched film has a lower swelling rate, a higher power density of a hydrogen-oxygen fuel cell and a higher water electrolysis hydrogen production performance.
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