Treating agent for improving interface bonding strength of UHMWPE and treating method of treating agent

Abstract

The invention provides an interface treating agent for ultra high molecular weight polyethylene. The treating agent is mainly prepared from, by mass, 30-50 parts of polyolefin and 100-200 parts of inert solvent. A treating method comprises the following steps that polyolefin is dissolved into the inert solvent to obtain a treating agent, ultra high molecular weight polyethylene fibers are steeped in the treating agent for 1-10 h and taken out to be dried, and then the interface treating agent is obtained. According to the interface treating agent, a tough tunica vaginalis structure can be formed on the surfaces of the fibers to wrap the fibers, so that the fibers and matrix resin are bonded together, and the interface bonding strength of the manufactured composite material is improved. When a bulletproof chip made of the composite material subjected to interface treating is subjected to projectile impact, propagation of impact waves is promoted, the fiber strength is exerted at maximum efficiency, and therefore the bulletproof property of the bulletproof chip is practically improved.

Description

technical field [0001] The invention relates to the field of ultra-high molecular weight polyethylene fiber interface pretreatment, in particular to a treatment agent and a treatment method for improving the interface bonding strength of ultra-high molecular weight polyethylene fibers. Background technique [0002] In addition to the characteristics of high strength and high modulus, ultra-high molecular weight polyethylene fiber (UHMWPE) also has good chemical corrosion resistance, high specific energy absorption, high electromagnetic wave transmittance, low friction coefficient, excellent impact resistance and cutting resistance. It has the characteristics of non-absorbent and good biocompatibility, and it is the fiber with the smallest relative density among all high-strength and high-modulus fibers. Therefore, UHMWPE fiber is an excellent material for making soft bulletproof clothing, stab-proof clothing, lightweight bulletproof helmets and other bulletproof armor. Howe...

AI Technical Summary

Problems solved by technology

However, due to the high crystallization and high orientation of UHMWPE fiber itself, its surface energy is extremely low, it is not easy to be wetted by resin, and there is no active functional group on the surface, so it is difficult to make soft bulletproof clothing, stab-proof clothing, light bulletproof The matrix resin of bulletproof armor such as helmets forms chemical bonds, which reduces the interfacial bonding strength of its composite materials, which largely limits the application of UHMWPE fibers in composite materials. Therefore, in order to enhance the degree of interfacial bonding, it is generally necessary to High Molecular Weight Polyethylene Fibers for Interface Treatment

[0003] In the prior art, the interface pretreatment of fibers is generally carried out by chemical etching, plasma surface treatment technology, radiation-induced grafting and other interface treatment methods, but these methods need to use a large amount of harmful chemical solvents in the interface treatment process , the operating conditions are relatively harsh, the operation process is complicated, the strength of the fiber after interface treatment is average, and the effect of greatly improving the physical properties of the material itself has not been achieved.