Polyethylene fibre surface processing method

Abstract

The invention discloses a polyethylene fibre surface processing method which comprises the following steps: (a) placing polyethylene fibre in an acid solution; and (b) oscillating ultrasonically. Compared with the prior art, the polyethylene fibre surface processing method is achieved as follows: the polyethylene fibre surface is etched by using the acid solution, molecular chains in the polyethylene fibre are loosened and wriggled and gaps are generated among molecules by using the ultrasonic oscillation, and the acid solution further etches the polyethylene fibre surface through the generated gaps and partial acid solution is remained on the polyethylene fibre surface, therefore, the roughness of the polyethylene fibre surface and the specific surface area are increased, the contact area of the polyethylene fibre surface with resin is increased during the preparation of a composite material, the cohesive force of the polyethylene fibre surface is favorably improved, partial polar bonds are remained on the polyethylene fibre, and chemical bonds of hydrogen bonds and the like are favorably generated between the fibre and the resin, so that the processing method can improve the cohesive capacity of the polyethylene fibre and the resin.

Description

technical field [0001] The invention relates to a polyethylene fiber surface treatment method, which belongs to the field of polymer materials. Background technique [0002] Ultra high molecular weight polyethylene (UHMWPE) fiber is also called high strength high module polyethylene (HSHMPE) fiber or elongation chain polyethylene (ECPE) polyethylene fiber or high performance polyethylene (high performance polyethylene (HPPE for short) fiber or high modulus polyethylene (high module polyethylene for short HMPE) fiber, generally refers to the weight average molecular weight of (1 ~ 6) × 10 6 The polyethylene fiber, sometimes weight average molecular weight also can be higher than this value, and this fiber is referred to as polyethylene fiber for short in the present invention. [0003] Polyethylene fiber was first developed and manufactured by DSM company in the Netherlands. The method adopted is the gel spinning-super-stretching method. The basic principle is: ultra-high m...

AI Technical Summary

Problems solved by technology

However, polyethylene macromolecules in polyethylene fibers have no polar groups, no chemical activity, and low surface energy. It is difficult to produce chemical bonds between fibers and resins, and it is difficult to generate strong interaction forces between fiber molecules and resin molecules. Not easily wetted by resin

In addition, the polyethylene molecules in polyethylene fibers are highly oriented, the surface is smooth, and the specific surface area is small, which is not conducive to the bonding of fibers and resins, so that the products are prone to fiber degumming and matrix resin cracking during use. , so that the anti-ballistic performance of polyethylene fiber bulletproof materials is reduced, which greatly limits the application of polyethylene fibers in composite materials, especially in the field of lightweight structural composite materials