Preparation method of modified packing ion enhanced polytetrafluoroethylene composite

Abstract

The invention relates to a preparation method of a modified packing ion enhanced polytetrafluoroethylene composite. A matrix of the composite is polytetrafluoroethylene; filling ions comprise tetrapod-like zinc oxide whiskers, aramid fibers, glass fibers and nano titanium dioxide; the masses of the tetrapod-like zinc oxide whiskers, the aramid fibers, the glass fibers and nano titanium dioxide account for 10-12%, 5-7%, 3-4% and 2-3% of the mass of polytetrafluoroethylene powder; the polytetrafluoroethylene powder is in 120-150 meshes; the tetrapod-like zinc oxide whiskers are 12-14 micrometers in length; the diameters of roots of the tetrapod-like zinc oxide whiskers are 3-5 micrometers; the aramid fibers are 2-2.5mm in length; each monofilament is 8-10 micrometers in diameter; the glass fibers are glass fiber powder in 120-140 meshes; and the particle size of nano titanium dioxide is 15-30nm. The modified enhanced polytetrafluoroethylene composite has the advantages of high mechanical strength, good abrasive resistance, good thermal conductivity, lower linear expansion coefficient and excellent antistatic property, the mechanical properties and thermostability of the polytetrafluoroethylene composite are improved greatly, and the application field of the composite is further extended.

Description

technical field

[0001] The invention relates to the field of new materials, in particular to a preparation method of a modified filler ion-enhanced polytetrafluoroethylene composite material. Background technique

[0002] In the polymer structure, fluoroplastics are polymers containing fluorine atoms (F) or fluorine atom groups. Profiles, unit products or parts are made of plastic-like molding methods, which are commonly referred to as fluoroplastics or fluoroplastic products. Generally, fluoroplastic polymers are synthesized from monomers through copolymerization or homopolymerization. These monomers include: fluorine-containing monomers such as tetrafluoroethylene, fluoroethylene, hexafluoropropylene, and vinylidene fluoride. They may exist in the form of solutions, pellets, powders and the like. Profiles or unit products are made through various molding processes, and the profiles are obtained through secondary processing methods to obtain parts. These fluoroplastic pro...