Preparation method of nano beta-manganese dioxide-graphite oxide-polytetrafluoroethylene wear-resistant anti-friction composite material

A technology of polytetrafluoroethylene and manganese dioxide, which is applied in the field of preparation of nanocomposite materials, can solve the problems of reduced service life, low bonding strength, and reduced resistance to mechanical fatigue and thermal fatigue, and achieve high mechanical strength and long service life. Long-lasting, excellent self-lubricating properties

Active Publication Date: 2016-06-22
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this patented technology only uses the bonding effect of industrial glue to compound the powders together, so the bonding strength between the components is small, which in turn reduces its resistance to mechanical fatigue and thermal fatigue, and ultimately leads to a decrease in its service life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Preparation of nanometer β-manganese dioxide-graphite oxide composite material:

[0035] ① Preparation of graphite oxide powder:

[0036] Add 80g of concentrated sulfuric acid with a mass concentration of 98% into a conical flask with a volume of 250mL, and use an ice-water bath to keep the temperature between 0 and 5°C; then add 1g of sodium nitrate into the conical flask filled with concentrated sulfuric acid In the flask, stir magnetically to completely dissolve the added sodium nitrate; then add 2 g of graphite powder with a particle size of 30 μm into the conical flask, and use an ice-water bath to control the temperature of the mixed solution in the conical flask not to be higher than 5 ° C. Stir the mixed solution for 90 minutes; then slowly add 1.2 g of potassium permanganate solid powder into the mixed solution, cool the Erlenmeyer flask with an ice-water bath to ensure that the temperature of the mixed solution in the Erlenmeyer flask is not higher than 10...

Embodiment 2

[0047] (1) Preparation of nanometer β-manganese dioxide-graphite oxide composite material:

[0048]① Preparation of graphite oxide powder:

[0049] Add 84g of concentrated sulfuric acid with a mass concentration of 98% into a 250mL Erlenmeyer flask, and use an ice-water bath to cool it so that its temperature is kept between 0 and 5°C; then add 1.4g of sodium nitrate into the conical flask filled with concentrated sulfuric acid In the conical flask, stir magnetically to completely dissolve the added sodium nitrate; then add 2.5g of graphite powder with a particle size of 30 μm into the conical flask, and use an ice-water bath to control the temperature of the mixed solution in the conical flask to not be higher than 5°C. Magnetically stir the mixed solution for 90 minutes; then slowly add 1.4g of potassium permanganate solid powder into the mixed solution, use an ice-water bath to cool the Erlenmeyer flask, ensure that the temperature of the mixed solution in the Erlenmeyer fl...

Embodiment 3

[0060] (1) Preparation of nanometer β-manganese dioxide-graphite oxide composite material:

[0061] ① Preparation of graphite oxide powder:

[0062] Add 86g of concentrated sulfuric acid with a mass concentration of 98% into a 250mL Erlenmeyer flask, and use an ice-water bath to keep the temperature between 0 and 5°C; then add 1.6g of sodium nitrate into the conical flask filled with concentrated sulfuric acid In the conical flask, stir magnetically to completely dissolve the added sodium nitrate, then add 3.6g of graphite powder with a particle size of 30 μm into the conical flask, and use an ice-water bath to control the temperature of the mixed solution in the conical flask to not be higher than 5°C. Stir the mixed solution with magnetic force for 90 minutes; then slowly add 1.6g of potassium permanganate solid powder into the mixed solution, use an ice-water bath to cool the Erlenmeyer flask, ensure that the temperature of the mixed solution in the Erlenmeyer flask is not ...

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Abstract

The invention relates to a preparation method of a nano beta-manganese dioxide-graphite oxide-polytetrafluoroethylene wear-resistant anti-friction composite material. The method mainly comprises the following steps: preparing graphite oxide powder, carrying out ultraviolet irradiation and amination treatment on polytetrafluoroethylene powder, carrying out hydrothermal synthesis to prepare a nano beta-manganese dioxide-graphite oxide composite material, preparing mixed powder for preparing the nano beta-manganese dioxide-graphite oxide-polytetrafluoroethylene wear-resistant anti-friction composite material, and finally, sequentially carrying out cold compression molding and series heat treatment, thereby preparing the nano beta-manganese dioxide-graphite oxide-polytetrafluoroethylene wear-resistant anti-friction composite material. The nano beta-manganese dioxide-graphite oxide-polytetrafluoroethylene wear-resistant anti-friction composite material has the advantages of small friction factor, low wear rate, high heat stability, high mechanical strength and long service life, and can be widely used in the fields of chemical industry, machinery, aerospace and the like.

Description

technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to a preparation method of a nanocomposite material. Background technique [0002] In recent years, with the rapid development of mechanical forming and manufacturing, chemical industry, aerospace and other industries, the problem of wear and tear of core components of equipment has become increasingly prominent. Statistical results show that, besides the fatigue fracture of the core components, the friction damage of the kinematic pair is the most common cause of mechanical equipment damage. In addition, in the aerospace field, the joint bearings of aircraft have poor wear resistance and friction reduction performance, which greatly limits the improvement of their comprehensive performance. Conventional lubricating oil can effectively alleviate the wear of the contact surfaces of components, but the lubrication system is complex in configuration, high in maintena...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/18C08K9/02C08K3/04C08K3/22C08F8/32
CPCC08F8/32C08K3/04C08K3/22C08K9/02C08K2003/2262C08K2201/011C08L2201/08C08L27/18
Inventor 宋来洲韩康达杨育林左镇张英莉王秀丽
Owner YANSHAN UNIV
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