A preparation method and application of aluminum honeycomb reinforced polyimide rigid foam

By introducing an aluminum honeycomb reinforcing skeleton into polyimide foam and forming an interpenetrating network structure using vacuum infusion and a staged process, the problem of insufficient mechanical properties of polyimide foam is solved, and the preparation of high-performance lightweight materials suitable for high-temperature environments is realized.

CN122277982APending Publication Date: 2026-06-26ZIGONG ZHONGTIANSHENG NEW MATERIAL TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZIGONG ZHONGTIANSHENG NEW MATERIAL TECH CO LTD
Filing Date
2026-04-22
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing technologies struggle to improve the mechanical properties of polyimide foam without significantly increasing its weight. Furthermore, existing reinforcement methods suffer from poor uniformity of distribution and orientation control in three-dimensional space, which negatively impacts the closed-cell structure and thermal insulation performance of the foam.

Method used

Using aluminum honeycomb as a reinforcing skeleton, a multi-stage pre-foaming and gelation process combined with programmed temperature imidization is employed to form an aluminum honeycomb-polyamic acid interpenetrating network structure, achieving interfacial bonding and uniform filling.

Benefits of technology

It significantly improves the mechanical properties and temperature resistance of the material, achieving high specific strength and high specific stiffness, while maintaining the thermal insulation, flame retardant and low smoke properties of polyimide foam, and also possessing impact resistance and dimensional stability.

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Abstract

This invention relates to the field of polymer materials technology, specifically to a method for preparing and applying a rigid polyimide foam reinforced with aluminum honeycomb. The method for preparing the rigid polyimide foam reinforced with aluminum honeycomb provided by this invention includes steps such as surface pretreatment of the aluminum honeycomb core material and fixing the pretreated aluminum honeycomb core material into a molding die. The rigid polyimide foam material reinforced with aluminum honeycomb obtained by this invention not only possesses high specific strength and high specific stiffness, but also inherits the excellent properties of polyimide foam such as high temperature resistance, flame retardancy, low smoke, and thermal insulation. The introduction of the aluminum honeycomb skeleton also improves the material's impact resistance and dimensional stability, making it an ideal multifunctional integrated lightweight structural material with promising application prospects.
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