Wear-resistant heat-insulating composite material and preparation method thereof
A composite material and thermal insulation technology, which is applied in the direction of chemical instruments and methods, synthetic resin layered products, layered products, etc., can solve the problems of poor wear resistance, large creep performance, and decreased friction performance at low temperature, so as to avoid sticking Joining process, good wear resistance, high mechanical strength
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[0025] A method for preparing a wear-resistant and heat-insulating composite material according to a specific embodiment of the present invention includes the following steps:
[0026] 1. Preparation of wear-resistant layer
[0027] The raw material composition of the wear-resistant layer (parts by mass): 60-90 parts of polytetrafluoroethylene micropowder, 2-10 parts of molybdenum disulfide, 2-10 parts of polyphenylene ester, and 0-10 parts of hollow glass microspheres. Among them, polytetrafluoroethylene micropowder is the main wear-resistant resin, molybdenum disulfide is used as a solid lubricant to improve friction performance, polyphenylene improves mechanical strength and processing performance, and hollow glass microspheres reduce thermal conductivity and improve resin fluidity.
[0028] Preparation method of wear-resistant layer: After mixing the above raw materials, put them into a mold and pressurize at a pressure of 10-80MPa, hold the pressure for 1-10min, then rele...
Embodiment 1
[0040] 1. Preparation of wear-resistant layer:
[0041] Raw material composition: 90 parts of polytetrafluoroethylene micropowder, 5 parts of molybdenum disulfide, and 5 parts of polyphenylene ester. Put it into the mold, pressurize at 30MPa, hold the pressure for 5min, sinter at 370°C, and keep it warm for 5 hours. The wear-resistant layer is activated by a naphthalene-sodium treatment solution, and the naphthalene-sodium treatment solution is a solution formed by dissolving an equimolar ratio of sodium and naphthalene in a tetrahydrofuran solvent.
[0042] 2. Preparation of reinforcement layer prepreg
[0043] Mix the hollow glass microspheres into the epoxy resin adhesive, then impregnate the glass fiber with the adhesive, and bake to form a glass fiber pre-impregnated material with a semi-cured material on the plain glass cloth. The composition of the pre-preg: glass fiber 67 parts, 30 parts of semi-cured material, and 3 parts of hollow glass microspheres.
[0044] 3. T...
Embodiment 2
[0049] 1. Preparation of wear-resistant layer:
[0050]Raw material composition: 85 parts of polytetrafluoroethylene micropowder, 7 parts of molybdenum disulfide, 2 parts of polyphenylene ester, and 6 parts of hollow glass microspheres. Put it into the mold, pressurize at 20MPa, keep the pressure for 3min, sinter at 370°C, and keep it warm for 5 hours. The wear-resistant layer is activated by a naphthalene-sodium treatment solution, and the naphthalene-sodium treatment solution is a solution formed by dissolving an equimolar ratio of sodium and naphthalene in a tetrahydrofuran solvent.
[0051] 2. Preparation of reinforcement layer prepreg
[0052] Mix the hollow glass microspheres into the polyamide-imide adhesive, then impregnate the glass fiber with the adhesive, and bake it to form an aramid fiber prepreg material with a semi-cured material on the plain aramid cloth. The prepreg composition : 65 parts of aramid fiber, 30 parts of semi-cured product, 5 parts of hollow gla...
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