A kind of graphene-reinforced aluminum-based lightweight brake disc and preparation method thereof
A technology of graphene and brake discs, which is applied in the field of aluminum-based lightweight brake discs and its preparation, can solve problems such as poor thermal conductivity, and achieve the effects of improved thermal conductivity, improved stability, and good thermal conductivity
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Embodiment 1
[0017] Step 1, heat conduction modification on the surface of graphene: in parts by weight, conduct high-energy ball milling on the silicon carbide micropowder until the average particle size is 20-50nm, and then take 10 parts of the ball milled silicon carbide and add it to 2wt% silane In 100 parts of ethanol solution of coupling agent, heat and reflux for 2 hours to graft silane coupling agent KH550 on the surface of silicon carbide, and then add 20 to 30 parts of graphene oxide. After the reaction, centrifuge the product and remove the supernatant , after vacuum drying, graphene with silicon carbide on the surface is obtained;
[0018] Step 2, wear-resisting modification on the surface of graphene: by weight, take 5-8 parts of graphene whose surface is thermally conductive with silicon carbide, soak it in 3wt% NaOH aqueous solution for 1h, increase the number of hydroxyl groups on the surface, and centrifuge the product Separate, then add to 120 parts of the solution prepar...
Embodiment 2
[0022] Step 1, heat conduction modification on the surface of graphene: in parts by weight, perform high-energy ball milling on the silicon carbide micropowder until the average particle size is 20-50nm, and then take 15 parts of the ball milled silicon carbide and add it to 5wt% silane In 140 parts of the ethanol solution of the coupling agent, heat and reflux for 4 hours to graft the silane coupling agent KH550 on the surface of silicon carbide, and then add 30 parts of graphene oxide. After the reaction, the product is centrifuged, the supernatant is removed, and the vacuum After drying, graphene with silicon carbide on the surface is obtained;
[0023] Step 2, wear-resisting modification on the surface of graphene: in parts by weight, take 8 parts of graphene whose surface is thermally conductive with silicon carbide, soak it in 6wt% NaOH aqueous solution for 3h, increase the number of hydroxyl groups on the surface, and centrifuge the product, Then add it to 150 parts of ...
Embodiment 3
[0027] The first step, heat conduction modification on the surface of graphene: in parts by weight, conduct high-energy ball milling of silicon carbide micropowder to an average particle size of 20-50nm, and then take the ball-milled silicon carbide 12 and add it to 3wt% silane In 120 parts of the ethanol solution of the coupling agent, heat and reflux for 3 hours to graft the silane coupling agent KH550 on the surface of silicon carbide, and then add 25 parts of graphene oxide. After the reaction, the product is centrifuged, the supernatant is removed, and vacuum-dried Finally, the graphene with surface silicon carbide heat conduction is obtained;
[0028] Step 2, wear-resisting modification on the surface of graphene: in parts by weight, take 7 parts of graphene whose surface is thermally conductive with silicon carbide, soak it in 5wt% NaOH aqueous solution for 2h, increase the number of hydroxyl groups on the surface, and centrifuge the product, Then add it to 130 parts of...
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