Preparation method of surface-modified ultra-high molecular weight polyethylene (UHMWPE) fibers

Abstract

The invention relates to the technical field of fiber surface modification, in particular to a preparation method of a surface-modified ultra-high molecular weight polyethylene (UHMWPE) fiber. The UHMWPE fiber comprises an ultra-high molecular weight polyethylene fiber and an inorganic nanoparticle layer grafted on the surface of the ultra-high molecular weight polyethylene fiber. The preparation method comprises the following steps: grafting a silane coupling agent to the surface of the ultra-high molecular weight polyethylene fiber under the action of an initiator, and grafting nanoparticles to the surface layer of the ultra-high molecular weight polyethylene fiber through a hydrolysis reaction to construct a layer of inorganic nanoparticles. The layer of inorganic nanoparticles is grafted and fixed on the surface of the ultra-high molecular weight polyethylene fiber through chemical grafting, so that the wear resistance, the interface bonding performance and the cutting resistance of the fiber surface are remarkably improved on the premise of ensuring that the mechanical property of the ultra-high molecular weight polyethylene fiber is not reduced; and therefore, a solid foundation is provided for the application of the ultra-high molecular weight polyethylene in anti-cutting gloves, and puncture-proof and bulletproof places.

Description

technical field [0001] The invention relates to the technical field of fiber surface modification, in particular to a method for preparing surface-modified ultra-high molecular weight polyethylene (UHMWPE) fibers. Background technique [0002] Ultra-high molecular weight polyethylene (UHMWPE) fibers are usually linear polymers with an average molecular weight of more than 1.5 million. Together with carbon fibers and aramid fibers, they are called the three high-performance fibers. They have light weight, high strength, high modulus, impact resistance, Excellent properties such as wear resistance, corrosion resistance, light resistance, durability, radiation resistance, biocompatibility and low dielectric constant have been widely used in the fields of national defense and military industry, safety protection, marine industry, aerospace, functional clothing and so on. [0003] Since the molecular chain of ultra-high molecular weight polyethylene fiber is a linear structure, t...

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Problems solved by technology

[0003] Since the molecular chain of ultra-high molecular weight polyethylene fiber is a linear structure, there are only two elements of carbon and hydrogen on the molecular chain, the surface is smooth and inert, and there are few active functional groups, it is difficult to chemically graft and modify the fiber, thus limiting the ultra-high molecular weight polyethylene fiber. Popularization of Vinyl Fiber in the Field of Structural Materials