一种高强韧纳米复合纤维及其制备方法
By combining the formation of nanocomposite fibers on a hydrogel substrate with post-stretching and annealing treatment, the problems of insufficient polymer crystallinity and nanosheet orientation in nanocomposite fibers were solved, resulting in the preparation of high-strength and high-toughness nanocomposite fibers with significantly improved performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- BEIHANG UNIV
- Filing Date
- 2024-01-26
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies cannot easily improve the crystallinity of polymers and the orientation of nanosheets in nanocomposite fibers, resulting in the fibers having shortcomings in terms of both high strength and high toughness.
Using hydrogel as a substrate, gel fibers are formed by swelling in Ca2+ aqueous solution and injecting a mixed aqueous dispersion of polyvinyl alcohol, carbon nanotubes and montmorillonite. Subsequently, post-stretching and annealing are performed in salt solution to enhance the orientation and crystallinity of polymer chains and nanosheets in the fibers.
Nanocomposite fibers with both high strength and high toughness were prepared, with a tensile strength of 1.29 GPa, an ultimate strain of 37.5%, and a toughness of up to 311 MJ/m3, which are significantly better than the performance of existing fibers in nature and in the literature.
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Figure CN117926445B_ABST