Tough electromagnetic interference shielding hydrogel material as well as preparation method and application thereof

By introducing MXene and salting treatment into the hydrogel, a dual network structure is constructed, which solves the problem of insufficient mechanical and conductive properties of existing hydrogel materials, and the preparation of strong electromagnetic interference shielding hydrogel materials is realized, with excellent mechanical and electromagnetic shielding properties.

CN119708361AInactive Publication Date: 2025-03-28UNIV OF SCI & TECH OF CHINA
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Patent Information

Application Number
CN202510213787.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-02-26
Publication Date
2025-03-28
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

While maintaining high-efficiency EMI shielding performance, existing hydrogel electromagnetic shielding materials have weak mechanical properties and low electrical conductivity, which limits their application in flexible electronic devices and EMI shielding.

Method used

By mixing chitosan, acrylic, crosslinking agent, thermal initiator and MXene dispersion, ultrasonic dispersion treatment and vacuum degassing, followed by thermal polymerization and salting treatment, a strong electromagnetic interference shielding hydrogel material was prepared.

Benefits of technology

This method constructs a dual network structure, significantly improving the mechanical properties and conductive properties of the hydrogel, and achieving excellent mechanical properties, electromagnetic shielding properties and electrical properties.

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Abstract

The invention belongs to the technical field of intelligent soft materials, and particularly relates to a tough electromagnetic interference shielding hydrogel material and a preparation method and application thereof.The preparation method comprises the following steps that S1, chitosan, acrylic acid, a cross-linking agent, a thermal initiator and MXene dispersion liquid are added into water, and a mixed solution is obtained; s2, carrying out ultrasonic dispersion treatment on the mixed solution, uniformly mixing in a vacuum environment, and degassing to obtain a reaction solution; s3, heating the reaction liquid to enable acrylic acid in the reaction liquid to be subjected to thermal polymerization to generate MXene / polyacrylic acid-chitosan composite hydrogel; through construction of a double-network structure and salting-out treatment, the mechanical property of the hydrogel is greatly improved, so that the hydrogel has relatively high strength and fracture toughness; a proper amount of MXene is added and salting-out treatment is carried out, so that the conductivity and electromagnetic interference shielding performance of the hydrogel are improved, and the prepared hydrogel has excellent mechanical property, electromagnetic shielding performance and electrical (strain sensing) performance and has an obvious and good resistance-strain effect.
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