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.
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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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