Functionalized ultra-high molecular weight polyethylene fiber and preparation method thereof

By performing bidirectional synergistic modification of UHMWPE fibers with nanoparticles, the problem of the lack of polar groups on the surface of UHMWPE fibers was solved, and the surface properties and mechanical properties were improved, making them suitable for industrial production.

CN120989748APending Publication Date: 2025-11-21JIUZHOU INTERSTELLAR TECH CO LTD
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Patent Information

Application Number
CN202510919540.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-07-04
Publication Date
2025-11-21

AI Technical Summary

Technical Problem

The lack of polar groups on the surface of existing UHMWPE fibers results in low adhesion to resin, which limits the realization of their excellent performance. Furthermore, existing modification methods suffer from cumbersome post-processing, high costs, and reduced mechanical properties.

Method used

SiO2 nanoparticles were chemically grafted with silane coupling agent KH550 to prepare SiO2 nanomonomers with disulfide bond structures on the surface. Through blending modification and extraction modification, the fibers were bidirectionally synergistically modified during the spinning process of UHMWPE fibers, establishing a bridging effect between the fiber interior and surface, and improving crystallinity and thermal stretching ratio.

Benefits of technology

The preparation process is simplified and the cost is reduced without compromising mechanical properties, and the surface and mechanical properties of UHMWPE fibers are significantly improved, making them suitable for industrial production.

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Abstract

According to the functionalized ultra-high molecular weight polyethylene fiber and the preparation method thereof, on the basis of dynamic reversible conversion of disulfide bonds and sulfydryl under certain conditions, the functionalized ultra-high molecular weight polyethylene fiber is introduced into an ultra-high molecular weight polyethylene (UHMWPE) fiber structure, and the mechanical property of a material can be adjusted. In order to improve the interface performance of the ultra-high molecular weight polyethylene fiber, a functional nanoparticle bidirectional synergistic modification method is adopted, and the modification method is carried out in two steps: blending modification and extraction modification. Functional nanoparticles are used, the whole fiber and the surface of the fiber are modified at the same time in the raw material blending stage and the gel silk extraction stage in the UHMWPE fiber spinning process, and a bridging effect is established between the interior of the UHMWPE fiber and the surface of the fiber through groups carried by the functional nanoparticles, so that the UHMWPE fiber is obtained. The crystallinity and the hot drawing ratio of the UHMWPE fiber in the multi-stage hot drawing stage are improved, so that the mechanical property and the surface property of the fiber are further improved. The preparation method has the characteristics of simple and feasible preparation process, controllable cost and the like, and can be used for industrial production.
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