Preparation method for halloysite, ultrafine inorganic powder and PTFE micro-nano composite material

A technology of polytetrafluoroethylene and inorganic powder is applied in the field of preparation of polytetrafluoroethylene micro-nano composite materials, which can solve the problem that creep resistance cannot be effectively improved, elongation at break and tensile strength are decreased, heavy metal pollution, etc. problems, to achieve the effect of improving mechanical properties, excellent friction resistance and creep resistance, and increasing crystallinity
CN104987633AActive Publication Date: 2015-10-21安徽桑瑞泰粉末材料有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
安徽桑瑞泰粉末材料有限公司
Publication Date
2015-10-21

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Abstract

Provided is a preparation method for a halloysite, ultrafine inorganic powder and PTFE micro-nano composite material, and the method relates to the technical field of preparation of PTFE micro-nano composite materials. The method comprises steps of: firstly, preparing a uniform mixing of PTFE and inorganic powder through mechanical high speed blending; then shaping the obtained mixed powder through cold pressing, and performing mold releasing to obtain a sheet-like sample; and finally placing the sample in a muffle furnace, raising the temperature to 370-380 DEG C at a rising rate of 150-200 DEG C / h, keeping the temperature for 2 hours, and then cooling the sample to the room temperature along with the furnace, thereby obtaining a PTFE micro-nano composite material. According to the method provided by the invention, the crystallization behavior of the PTFE is improved through filling with inorganic micro-nano particles; excellent mechanical properties of the PTFE are maintained by regulating interfacial adhesion between the micro-nano particles and the PTFE; meanwhile, the PTFE is endowed with excellent wear resistance and creep resistance.
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Description

technical field

[0001] The invention relates to the technical field of preparation of polytetrafluoroethylene micro-nano composite materials. Background technique

[0002] Polytetrafluoroethylene (PTFE) not only has excellent physical and chemical properties, but also has a very low coefficient of friction and self-lubricating material, making it widely used in chemistry, electronics, bioengineering, food industry and some other related fields. However, PTFE also has poor friction resistance and a large linear expansion coefficient, which limits its application in many demanding occasions. Therefore, many researches at home and abroad focus on the improvement of PTFE mechanics, wear resistance and creep resistance. Among them, the filling modification of PTFE is a widely used modification method. The crystallization behavior of PTFE can be changed by filling the filler, and the high-performance PTFE can be obtained by adjusting the interface bonding performance between the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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