Preparation method of high-salt-tolerant intelligent response cement-based salt corrosion resistant self-healing material

By constructing a multi-layered composite cement-based material and utilizing the synergistic effect of ZIF-8 and Mg-Al-LDH, intelligent response and efficient self-healing in high-salt environments were achieved, solving the corrosion problem of cement-based materials in high-salt environments and improving the material's salt corrosion resistance and self-healing performance.

CN122079528APending Publication Date: 2026-05-26CHANGAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHANGAN UNIV
Filing Date
2026-01-26
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing cement-based materials cannot effectively and actively repair corrosion caused by load and microcracks in high-salt environments. Traditional self-healing materials have slow repair rates and insufficient strength of repair products, and cannot provide long-term effective protection.

Method used

A four-layer composite structure was constructed using ZIF-8 with multiple active sites, Mg-Al-LDH, and silica fume-modified polyvinyl alcohol. Through the synergistic effect of microencapsulated epoxy resin, ZIF-8, and Mg-Al-LDH, intelligent response and efficient self-healing were achieved, mitigating salt ion erosion and promoting cement hydration.

Benefits of technology

It enables cement-based materials to actively resist salt corrosion and achieve efficient self-repair in high-salt environments, significantly reducing the penetration depth of salt ions, improving the self-repair rate and structural strength, and extending service life.

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Abstract

This invention discloses a method for preparing a high-salinity intelligent responsive cement-based anti-salt corrosion and self-healing material. The method includes constructing an intelligent responsive base by preparing a microcapsule self-healing agent and regulating the ZIF-8 preparation process, followed by in-situ growth of Mg-Al-LDH and functional film coating. This achieves the synergistic functions of active anti-salt corrosion, efficient and stable self-healing, promoting cement hydration, and regulating ion adsorption in high-salt environments. This invention can accurately sense changes in high-salt environments and intelligently release the self-healing agent, realizing the dual functions of anti-salt corrosion and self-healing in cement-based materials. It can be widely applied in cement-based engineering projects in high-salt environments such as marine and salt lake environments, extending the service life of concrete structures.
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