Wear-resistant epoxy resin composite material and preparation method thereof
A composite material and epoxy resin technology, which is applied in the field of wear-resistant epoxy resin composite materials and its preparation, can solve the problems of affecting the service life of epoxy resin materials and unsatisfactory wear resistance
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[0029] In the present invention, the modified graphene is preferably obtained by modifying graphene raw materials with dicyclohexylcarbodiimide and 3-aminopropyltriethoxysilane. In the present invention, the preparation method of described modified graphene preferably comprises:
[0030] The graphene raw material, dicyclohexylcarbodiimide and 3-aminopropyltriethoxysilane are mixed to obtain a mixture;
[0031] The mixture is sequentially subjected to ultrasonication, standing for heat preservation, cooling, separation and drying to obtain modified graphene.
[0032] In the present invention, the graphene raw material, dicyclohexylcarbodiimide and 3-aminopropyltriethoxysilane are preferably mixed to obtain a mixture. In the present invention, the diameter of the graphene raw material is preferably 2 / g, more preferably 450 to 500 m 2 / g; the density of the graphene raw material is preferably 2-2.25g / cm 3 ; The thermal conductivity of the graphene raw material is preferably >...
Embodiment 1
[0072] Mix 1 part of graphene raw material and 400 parts of 3-aminopropyltriethoxysilane, disperse for 5 hours using an ultrasonic disperser, keep warm at 75°C for 24 hours, centrifuge after cooling, wash and dry in vacuum to obtain modified graphene.
[0073] The modified graphene of 0.25g (0.25 parts) is added in batches in the acetone solution of 1L, it is placed in the sonicator and the mixed solution is subjected to sonication, obtains the graphene dispersion liquid.
[0074] After heating 100 parts of epoxy resin into a molten state, add successively tert-butyl peroxybenzoate accounting for 2% of epoxy resin quality, 0.5% p-benzoquinone accounting for epoxy resin quality and 2.5% of epoxy resin quality MgO, forming a resin melt.
[0075] Add the obtained resin frit to the graphene dispersion liquid, use a stirrer, under the condition of 300r / min, stir at a slow speed for 10min, and then under the condition of 700r / min, stir rapidly for 30min to obtain the mixed frit, pla...
Embodiment 2
[0079] Graphene oxide was prepared by the improved Hummers method; 3g of graphite powder and 1g of sodium nitrate were added to a three-necked flask filled with 69mL of concentrated sulfuric acid, and 12g of potassium permanganate was slowly added under stirring in an ice-water bath, and reacted below 10°C for 1h; the temperature was raised to Continue to stir for 2 hours at about 35°C; slowly add 120mL deionized water; raise the temperature of the reaction system to about 95°C, keep it for 30min, add a large amount of distilled water to dilute, pour 30% H 2 o 2 Until no bubbles are generated, filter while hot, and wash the filter cake with dilute hydrochloric acid (HCl to water volume ratio is 1:10) until there is no SO in the filtrate 4 2- (BaCl 2testing), and dried to obtain graphite oxide; dissolving graphite oxide in water, ultrasonicating at 100 kW for 1 h to make it completely dispersed to obtain graphene oxide; mixing graphene oxide with a silane coupling agent at a ...
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