A kind of coating containing composite silicon rubber and preparation method thereof
A technology of compounding silicone rubber and silicone rubber, applied in the direction of coating, can solve the problems of increased heat of devices, serious economic loss of electrical aging, etc., and achieve the effect of improving thermal conductivity and mechanical properties
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Embodiment 1
[0033] 1. Formulation and preparation of graphene oxide
[0034] First prepare graphene oxide, which includes:
[0035]
[0036] Preparation method: According to the formula ratio, first cool the reaction tank and concentrated sulfuric acid at 4°C for 1 hour. Spread flake graphite powder, sodium nitrate, and potassium permanganate layer by layer in the reaction tank, then slowly drain and add concentrated sulfuric acid, seal the reaction tank, and react at 1°C for 2 hours, then tighten the cover, and then move to React in an oven at 140°C for 2 hours. After the reaction is over, cool it to room temperature, then open the lid, pour it into a 1000ml beaker, add 500ml of deionized water and stir, then add hydrogen peroxide until bright yellow or earthy yellow while stirring, then add concentrated hydrochloric acid and stir, and finally Wash with deionized water to neutrality by centrifugal filtration, and vacuum-dry at 60°C to obtain graphene oxide.
[0037] Then prepare gr...
Embodiment 2
[0047] 1. Formulation and preparation of graphene oxide
[0048] First prepare graphene oxide, which includes:
[0049]
[0050]Preparation method: According to the formula ratio, first cool the reaction tank and concentrated sulfuric acid at 0°C for 0.5 hours. Spread flake graphite powder, sodium nitrate, and potassium permanganate layer by layer in the reaction tank, then slowly drain and add concentrated sulfuric acid, seal the reaction tank, and react at -1°C for 5 hours, then tighten the cover, and then remove React in an oven at 90°C for 4 hours. After the reaction is over, cool it down to room temperature, then open the lid, pour it into a 1000ml beaker, add 700ml of deionized water and stir, then add hydrogen peroxide until bright yellow or earthy yellow while stirring, then add concentrated hydrochloric acid and stir, and finally Wash with deionized water to neutrality by centrifugal filtration, and vacuum-dry at 40°C to obtain graphene oxide.
[0051] Then prep...
Embodiment 3
[0060] 1. Formulation and preparation of graphene oxide
[0061] First prepare graphene oxide, which includes:
[0062]
[0063]
[0064] Preparation method: According to the formula ratio, first cool the reaction tank and concentrated sulfuric acid at 1°C for 0.7 hours. Spread flake graphite powder, sodium nitrate, and potassium permanganate layer by layer in the reaction tank, then slowly drain and add concentrated sulfuric acid, seal the reaction tank, and react at 0°C for 3 hours, then tighten the cover, and then move to React in an oven at 100°C for 3.5 hours. After the reaction is over, cool it down to room temperature, then open the lid, pour it into a 1000ml beaker, add 650ml of deionized water and stir, then add hydrogen peroxide until bright yellow or earthy yellow while stirring, then add concentrated hydrochloric acid and stir, and finally Wash with deionized water to neutrality by centrifugal filtration, and vacuum-dry at 45°C to obtain graphene oxide.
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