Graphene composite modified high-strength polyethylene fiber and preparation method thereof

Abstract

The invention discloses graphene composite modified high-strength polyethylene fiber and a preparation method thereof. The graphene composite modified high-strength polyethylene fiber comprises UHMWPE (ultra-high molecular weight polyethylene) and graphene, wherein calculated by weight percentage, UHMWPE accounts for 98%-99.8%, and graphene accounts for 0.2%-2%; the molecular weight of UHMWPE is 2.4 million-2.6 million; and the particle size of graphene is 0.5-1.5um, and the particle size is 0.33-0.35nm. The preparation method disclosed by the invention is simple and convenient, and excellent performances are realized. Graphene is mixed into a white oil solution of UHMWPE by a method of adding a stock solution, uniform stirring is performed, and then the graphene modified high-strength polyethylene fiber is further prepared by spinning by a wet spinning method, so that the performances are effectively improved.

Description

technical field [0001] The invention relates to a polyethylene fiber and a preparation method thereof. Background technique [0002] Ultra-high molecular weight polyethylene fiber is one of the most mature high-performance fibers in the world today. It is widely used in many fields such as aviation, aerospace, military industry, marine engineering, glass processing, etc., especially the body armor made of it. , Bulletproof plates, bulletproof helmets, explosion-proof shields, etc. are increasingly used in personal protection and armor protection. [0003] However, due to the structure of polyethylene itself, it is poor in temperature resistance and heat transfer. The long-term use temperature is not higher than 80 degrees, and it can be used at 120 degrees in the short term. The thermal conductivity is only 20w / m.k. The non-woven fabric products made of high-strength polyethylene fibers cannot quickly conduct the heat energy converted from kinetic energy when they are subje...

AI Technical Summary

Problems solved by technology

[0003] However, due to the structure of polyethylene itself, it is poor in temperature resistance and heat transfer. The long-term use temperature is not higher than 80 degrees, and it can be used at 120 degrees in the short term. The thermal conductivity is only 20w / m.k

The non-woven fabric products made of high-strength polyethylene fibers cannot quickly conduct the heat energy converted from kinetic energy when they are subjected to external impact. External force breakdown

These shortcomings have led to the fact that the bulletproof products developed by people based on high-strength polyethylene are generally heavy in weight. Taking bulletproof vests as an example, the weight ranges from 1.5kg to 3kg, and even bulletproof inserts are added, which is very unfavorable for wearing.