低热膨胀低摩擦聚酰亚胺复合材料、其制备方法及应用
By introducing phenylacetylene phthalic anhydride-modified γ-aminopropyltriethoxysilane-modified graphene oxide and chopped carbon fibers into polyimide materials, the wear resistance and dispersion problems of polyimide materials are solved, realizing a high-performance composite material with low friction and low thermal expansion, suitable for components such as engine bushings.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- AVIC BEIJING INST OF AERONAUTICAL MATERIALS
- Filing Date
- 2024-10-31
- Publication Date
- 2026-07-17
AI Technical Summary
Existing polyimide materials have shortcomings in terms of wear resistance and dispersibility, resulting in significant energy loss and wear during equipment operation. Furthermore, common nanofillers have poor dispersibility in polyimide, limiting performance improvement.
Phenylacetylene phthalic anhydride-modified γ-aminopropyltriethoxysilane-modified graphene oxide and chopped carbon fibers were mixed with phenylacetylene-terminated polyimide resin to improve their compatibility and dispersion uniformity in the resin, thereby enhancing their abrasion resistance and thermal dimensional stability.
It significantly reduces the coefficient of friction and the coefficient of thermal expansion, and improves mechanical properties. The coefficient of friction is as low as 0.2, the tensile strength reaches 85.9MPa, and the modulus reaches 8.8GPa, making it suitable for wear-resistant parts such as engine bushings.
Smart Images
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