Method for preparing modified and enhanced polytetrafluoroethylene composite material

A polytetrafluoroethylene, composite material technology, applied in chemical instruments and methods, fibrous fillers, inorganic pigment treatment and other directions, can solve the problems of poor antistatic performance, large coefficient of linear expansion, low mechanical properties, etc., to improve thermal conductivity efficiency, thermal performance improvement, heat resistance and creep resistance

Inactive Publication Date: 2015-06-17
山东瑞特新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a method for preparing a modified reinforced polytetrafluoroethylene composite material to solve the problem of low mechanical properties, poor wear resistance, poor thermal conductivity, large linear expansion coefficient and poor antistatic performance of existing polytetrafluoroethylene materials Defects

Method used

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Embodiment 1

[0018] A method for preparing a modified reinforced polytetrafluoroethylene composite material. The matrix of the composite material is polytetrafluoroethylene, and the filling ions include tetraacicular zinc oxide whiskers, aramid fiber and glass fiber, wherein the tetraacicular zinc oxide crystal The mass of whiskers, aramid fibers and glass fibers accounted for 16%, 8% and 5% of the mass of PTFE powder respectively, PTFE was 150 mesh PTFE powder, and the length of tetrapod zinc oxide whiskers was 12 μm , diameter 3μm, aramid fiber length 2mm, monofilament diameter 8μm, glass fiber 120 mesh glass fiber powder; four needle-shaped zinc oxide whiskers need to be modified according to the following method: Weigh 0.5 g silane coupling agent KH- Dissolve 570 in 60ml of acetone, then add dropwise oxalic acid to adjust the pH to 5, and let it stand for 20 minutes; then weigh 12g of tetrapod-like zinc oxide whiskers and place them in the above solution, stir at 55°C for 6 hours; then ...

Embodiment 2

[0022] A method for preparing a modified reinforced polytetrafluoroethylene composite material. The matrix of the composite material is polytetrafluoroethylene, and the filling ions include tetraacicular zinc oxide whiskers, aramid fiber and glass fiber, wherein the tetraacicular zinc oxide crystal The quality of whiskers, aramid fibers and glass fibers accounted for 16%, 8% and 4% of the mass of PTFE powder respectively, PTFE was 180 mesh PTFE powder, and the length of tetrapod zinc oxide whiskers was 14 μm , diameter 5 μm, aramid fiber length 2.5 mm, monofilament diameter 10 μm, glass fiber 140 mesh glass fiber powder; four needle-shaped zinc oxide whiskers need to be modified according to the following method: Weigh 0.8 g silane coupling agent KH Dissolve -570 in 70ml of acetone, then add dropwise oxalic acid to adjust the pH to 6, and let it stand for 25 minutes; then weigh 14g tetrapod-shaped zinc oxide whiskers and place them in the above solution, and stir for 6 hours at...

Embodiment 3

[0026] A method for preparing a modified reinforced polytetrafluoroethylene composite material. The matrix of the composite material is polytetrafluoroethylene, and the filling ions include tetraacicular zinc oxide whiskers, aramid fiber and glass fiber, wherein the tetraacicular zinc oxide crystal The mass of whiskers, aramid fibers and glass fibers accounted for 16%, 8% and 5% of the mass of PTFE powder respectively, PTFE was 150 mesh PTFE powder, and the length of tetrapod zinc oxide whiskers was 12 μm , diameter 3μm, aramid fiber length 2mm, monofilament diameter 8μm, glass fiber is 120-mesh glass fiber powder; filling ions also include silicon carbide, which accounts for 4% of the mass of polytetrafluoroethylene powder; the average particle size of silicon carbide is 15μm α-SiC particles; four-needle zinc oxide whiskers need to be modified according to the following method: Weigh 0.5 g of silane coupling agent KH-570 and dissolve it in 60ml of acetone, then add oxalic acid...

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Abstract

The invention provides a method for preparing a modified and enhanced polytetrafluoroethylene composite material, wherein a technology scheme comprises that: polytetrafluoroethylene is used as a composite material substrate, and filling ions comprise tetrapod-like zinc oxide whiskers, aramid fiber and glass fiber, wherein weight of tetrapod-like zinc oxide whiskers, aramid fiber and glass fiber is respectively 14-16%, 6-8% and 4-5% that of the polytetrafluoroethylene powder; and the modified and enhanced polytetrafluoroethylene composite material is made from the substrate and the filling ions by a cold-press sintering method. The modified and enhanced polytetrafluoroethylene composite material has advantages of high mechanical strength, good wear resistance, good thermal conductivity, small linear expansion coefficient, and excellent antistatic performance, and greatly improves mechanical properties and heat stability of a polytetrafluoroethylene material, and the application fields is further widened.

Description

technical field [0001] The invention relates to the field of new materials, in particular to a preparation method of a modified reinforced 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 products are...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L27/18C08L77/10C08K9/06C08K7/08C08K7/14C08K3/34C08J5/06C08J5/08C09C1/28C09C3/00C09C3/06
Inventor 李海涛李恒滨毛凤
Owner 山东瑞特新材料有限公司
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