Preparation method of sodium citrate assisted nano manganese dioxide modified carbon fiber reinforced resin-based friction material
A technology of nano-manganese dioxide and fiber-reinforced resin, which is applied in the fields of carbon fiber, fiber treatment, textiles and papermaking, etc. It can solve the problems of loose manganese dioxide, unevenness, poor timeliness and controllability, etc., and achieve enhanced binding force, Effects of temperature reduction, improvement of friction and wear properties
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Embodiment 1
[0040] 1) Immerse polyacrylonitrile-based carbon fiber woven cloth with 50 mL of acetone solution for 48 hours to remove the residual sizing agent on the surface of the carbon cloth, then take out the carbon cloth, wash it repeatedly with deionized water three times, and then place it in a vacuum at 60 °C Dried in a drying oven for 12 hours to obtain a pretreated carbon cloth;
[0041]2) Mix 80mL of deionized water and 80mL of concentrated nitric acid solution evenly, arrange the dried carbon in a 500mL beaker, add the prepared concentrated nitric acid solution, keep it warm at 90°C for 2 hours, and then wash it repeatedly with deionized water carbon cloth three times, and then arrange the carbon in a vacuum oven at 60°C to dry for 12 hours to obtain acid-treated carbon cloth;
[0042] 3) Weigh 0.0316g of potassium permanganate into a 200mL beaker, add 70mL of deionized water, and stir with a magnetic stirrer until the solution is completely dissolved. Then add 0.0196g of sod...
Embodiment 2
[0046] 1) Immerse polyacrylonitrile-based carbon fiber woven cloth with 60 mL of acetone solution for 48 hours to remove the residual sizing agent on the surface of the carbon cloth, then take out the carbon cloth, wash it repeatedly with deionized water three times, and then place it in a vacuum at 60 °C Dried in a drying oven for 12 hours to obtain a pretreated carbon cloth;
[0047] 2) Evenly mix 85mL of deionized water and 85mL of concentrated nitric acid solution, arrange the dried carbon in a 500mL beaker, add the prepared concentrated nitric acid solution, keep it warm at 90°C for 2 hours, and then wash it repeatedly with deionized water carbon cloth three times, and then arrange the carbon in a vacuum oven at 60°C to dry for 10 hours to obtain acid-treated carbon cloth;
[0048] 3) Weigh 0.0316g of potassium permanganate into a 200mL beaker, add 70mL of deionized water, and stir with a magnetic stirrer until the solution is completely dissolved. Then add 0.0196g of so...
Embodiment 3
[0052] 1) Immerse polyacrylonitrile-based carbon fiber woven cloth with 70 mL of acetone solution for 48 hours to remove the residual sizing agent on the surface of the carbon cloth, then take out the carbon cloth, wash it repeatedly with deionized water three times, and then place it in a vacuum at 60 °C Dry it in a drying oven for 10 hours to obtain a pretreated carbon cloth;
[0053] 2) Evenly mix 70mL of deionized water and 70mL of concentrated nitric acid solution, arrange the dried carbon in a 500mL beaker, add the prepared concentrated nitric acid solution, keep it warm at 90°C for 2 hours, and then wash it repeatedly with deionized water carbon cloth three times, and then arrange the carbon in a vacuum oven at 60°C to dry for 10 hours to obtain acid-treated carbon cloth;
[0054] 3) Weigh 0.0316g of potassium permanganate into a 200mL beaker, add 70mL of deionized water, and stir with a magnetic stirrer until the solution is completely dissolved. Then add 0.0196g of s...
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