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Polytetrafluoroethylene composite material

A technology of polytetrafluoroethylene and polytetrafluoroethylene resin, which is applied in the field of polytetrafluoroethylene composite materials, can solve the problems of reducing density and increasing material water absorption, so as to increase steric hindrance and increase compatibility sex, avoiding reunion effects

Inactive Publication Date: 2020-06-05
GUANGZHOU MECHANICAL ENG RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the silane coupling agent and titanate coupling agent used are basically low-boiling coupling agents, which will undergo pyrolysis during high-temperature sintering, resulting in the formation of more voids in the composite material, increasing the The water absorption rate of the material reduces the density

Method used

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  • Polytetrafluoroethylene composite material
  • Polytetrafluoroethylene composite material
  • Polytetrafluoroethylene composite material

Examples

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Embodiment 1

[0032] As a polytetrafluoroethylene composite material of an embodiment of the present invention, the polytetrafluoroethylene composite material is composed of the following components by weight: 80 parts of polytetrafluoroethylene resin, 5 parts of fluorinated graphene, 0.1 1 part of glass fiber and 1 part of antimony trioxide. The preparation method of the present embodiment polytetrafluoroethylene composite material comprises the following steps:

[0033] (I) Disperse the polytetrafluoroethylene resin, fluorinated graphene, glass fiber and antimony trioxide in the carboxylic acid modified macromolecular dispersant solution according to the weight ratio, stir at 300r / min for 30min and then separate the solid from the liquid. Collect the solid and dry at 120°C for 2 hours, wherein the solvent of the carboxylic acid modified macromolecular dispersant solution is ethanol, and the mass concentration of the solute in the carboxylic acid modified macromolecular dispersant solution...

Embodiment 2

[0040] As a polytetrafluoroethylene composite material in an embodiment of the present invention, the polytetrafluoroethylene composite material is composed of the following components by weight: 99 parts of polytetrafluoroethylene resin, 0.1 part of fluorinated graphene, 19 Part glass fiber and 0.1 part antimony trioxide.

Embodiment 3

[0042] As a kind of polytetrafluoroethylene composite material of the embodiment of the present invention, described polytetrafluoroethylene composite material is made up of the following components by weight: 90 parts of polytetrafluoroethylene resin, 3 parts of fluorinated graphene, 15 parts Part glass fiber and 0.5 part antimony trioxide.

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Abstract

The invention provides a polytetrafluoroethylene composite material. The composition is prepared from the following components in parts by weight: 80-99 parts of fluorine-containing resin, 0.1-5 partsof fluorinated graphene, 0.1-19 parts of glass fiber and 0.1-1 part of antimonous oxide. The polytetrafluoroethylene composite material is prepared by dispersing polytetrafluoroethylene resin, fluorinated graphene, glass fibers and antimonous oxide in a carboxylic acid modified macromolecular dispersing agent solution according to a weight ratio, drying, pressing, molding and sintering. The preparation method of the carboxylic acid modified macromolecular dispersing agent comprises the following steps: dissolving acrylated methoxy polyethylene glycol, acrylic acid, S, S'-bis(2-methyl-2-propionic acid) trithiocarbonate and azodiisobutyronitrile in dioxane, introducing inert gas to remove oxygen, magnetically stirring until a homogeneous solution reacts at 60-80 DEG C, washing with n-hexane, and carrying out vacuum drying on the product. All the components in the polytetrafluoroethylene composite material are good in dispersity, and the polytetrafluoroethylene composite material has excellent mechanical property and heat-conducting property.

Description

technical field [0001] The invention relates to the technical field of polymer-based composite materials, in particular to a polytetrafluoroethylene composite material. Background technique [0002] Polytetrafluoroethylene (PTFE) material has excellent properties such as excellent medium resistance, low friction coefficient, and wide operating temperature range. It is an ideal material for sealing, but PTFE material is prone to creep and wear under the action of external force, and its service life is short. , poor mechanical properties. In order to improve the comprehensive performance of PTFE, it is necessary to modify PTFE, usually by physically filling it with other materials, using the characteristics of composite materials to make up for the shortcomings of PTFE itself, so as to achieve the purpose of modification. However, since PTFE is a solid material with the smallest surface energy and extremely low surface tension, other materials are difficult to adhere to its ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/18C08L51/08C08K3/04C08K7/14C08K3/22C08F290/06C08F220/06
CPCC08F290/06C08L27/18C08L51/08C08K3/042C08K7/14C08K3/2279C08F220/06
Inventor 叶素娟袁佳宇李国一梁小凤王勇王文虎谭锋黄兴
Owner GUANGZHOU MECHANICAL ENG RES INST
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