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High wear-resisting composite material of strenthen polytetrafuoro ethylene and fiber rod stone kind clay and preparation process and application thereof

A polytetrafluoroethylene and composite material technology, which is applied in the chemical industry, can solve the problems of multiple filling amounts and inability to take into account various indicators, and achieve the effects of excellent mechanical properties, low friction coefficient and excellent wear resistance.

Inactive Publication Date: 2005-01-05
上海高分子材料研究开发中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, conventional fiber and mineral-filled composite materials require a much higher filling amount, and various indicators cannot be taken into account

Method used

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  • High wear-resisting composite material of strenthen polytetrafuoro ethylene and fiber rod stone kind clay and preparation process and application thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0028] Example 1: Prepare a 1mol / l HCl solution, add attapulgite into the HCl solution, and disperse it by ultrasonic wave for 15 minutes. Heat and stir at 70°C for 4h. The solution was filtered and washed with tap water until the pH of the solution was 7. The filtrate was dried at 100°C, then pulverized, and sieved with a 200-mesh standard sieve. The attapulgite is mechanically blended with PTFE at a ratio of 1 (wt) %, and then molded under a pressure of 30 MPa. Sintering process: heat up to 320°C at 1°C / min, hold for 2 hours, then rise to 390°C at 0.5°C / min, hold for 3 hours, then cool down to room temperature at 1°C / min.

example 2

[0029] Example 2: Prepare a 1mol / l HCl solution, add sepiolite into the HCl solution, and disperse it by ultrasonic wave for 10 minutes. Heat and stir at 100°C for 2h. The solution was filtered and washed with distilled water until the pH of the solution was 7. The filtrate was dried at 110°C, then pulverized, and sieved with a 200-mesh standard sieve. Sepiolite is mechanically blended with PTFE at a ratio of 1 (wt) %, and then molded under a pressure of 30 MPa. Sintering process: heat up to 330°C at 1°C / min, hold for 0.5h, then rise to 375°C at 1.5°C / min, hold for 2h, then cool down to room temperature at 1.5°C / min.

example 3

[0030] Example 3: Prepare a 2mol / l HCl solution, add attapulgite into the HCl solution, and disperse it by ultrasonic wave for 20 minutes. Heat and stir at 90°C for 4h. The solution was filtered and washed with deionized water until the pH of the solution was 7. The filtrate was dried at 130°C, then pulverized, and sieved with a 300-mesh standard sieve. The attapulgite is mechanically blended with PTFE at a ratio of 3 (wt) %, and then molded under a pressure of 70 MPa. Sintering process: heat up to 328°C at 2°C / min, hold for 1 hour, then raise the temperature to 385°C at 1°C / min, hold for 2 hours, then cool down to room temperature at 1°C / min. Oil immersion treatment of materials: vacuum degree 6×10 -2 Pa, under the condition of 40°C, soak in 30# engine oil for 4 hours. Example 4: Prepare a 2mol / l HCl solution, add attapulgite into the HCl solution, and disperse it by ultrasonic wave for 40 minutes. Heat and stir at 100°C for 4h. The solution was filtered and washed with...

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Abstract

The invention is a high-wearability attapulgite clay reinforced polytetrafluorethylene composite, composed of attapulgite clays and polytetrafluorethylenes, and its characteristic: the content of the attapulgite clays is 20-1 wt% and that of the polytetrafluorethylenes is 80-99 wt%. Compared with existing techniques, the composite has lower friction coefficient and excellent wearability and mechanical property, applied in self-lubricating wearable parts in many fields, such as aviation, spaceflight, machinery, electronics, automobiles, home appliances, office, communications, etc. For the parts without considering oil stain pollution, after the composite are processed by oil dipping, it can obtain better wearability and lower friction coefficient.

Description

[technical field] [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a highly wear-resistant fiber rod-stone clay-reinforced polytetrafluoroethylene composite material, a preparation method and application. [technical background] [0002] Polytetrafluoroethylene (PTFE) is an excellent self-lubricating material due to its ultra-low friction coefficient, but pure PTFE has poor wear resistance and mechanical properties, so it is usually filled and modified. Among various filling modifications, nanoparticle filling is the most effective. Polymer nanocomposites are composite materials whose dispersed phase size is at least less than 100 nanometers, and are generally dispersed in the continuous phase with nanoscale particles (1-100 nanometers). Due to the large specific surface area and strong interaction force of nanoparticles, composite materials prepared with a small amount of nanoparticles have good performance: (1) lighter ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K3/34C08L27/18
Inventor 李同生赖仕全吕仁国刘旭军
Owner 上海高分子材料研究开发中心
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