Self-adhesive carbon fiber and steel fiber modified polytetrafluoroethylene material and preparation method thereof

Abstract

The invention discloses a self-adhesive carbon fiber and steel fiber modified polytetrafluoroethylene material and a preparation method thereof. The preparation method is characterized in that steel fibers and carbon fibers are used to improve the tensile strength and friction performance of polytetrafluoroethylene; at the same time, an improved melting method is used to sinter fine filling materials such as SiO2, Al powder, and the like, thus the fine filling materials can be sintered on the surface of polytetrafluoroethylene; the surface sintering state of polytetrafluoroethylene is improved, and the joint strength is obviously improved. Furthermore, aviation kerosene is used to promote the permeation and fusion among polytetrafluoroethylene materials, and thus the polytetrafluoroethylene materials can be adhered without using any adhesive.

Description

technical field

[0001] The invention relates to the fields of carbon fiber and steel fiber surface modification and polytetrafluoroethylene modified materials, in particular to a self-adhesive carbon fiber and steel fiber modified polytetrafluoroethylene material and a preparation method thereof. Background technique

[0002] Polytetrafluoroethylene (PTFE) is resistant to high and low temperatures, chemical corrosion, no water absorption, low coefficient of friction, excellent dielectric properties, known as the "King of Plastics". But because of the low surface energy (surface tension is (31 ~ 34) ×10 -3 N / m), high crystallinity and molecular chain structure symmetry and non-polarity, making it difficult to be bonded, restricting its application in the field of valve sealing materials. For this reason, scientists have adopted various methods to try to solve the surface bonding problem of PTFE, among which there are many studies on changing the surface structure or propertie...