Preparation method of heat conduction film
A heat-conducting film and organic polymer technology, which is applied in the field of graphene heat-conducting film preparation, can solve the problems of inability to peel off graphene aggregate powder, high temperature peeling temperature, unfavorable slurry preparation, etc., and achieve wide reaction conditions , stable reaction process, large size effect
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[0027]This application provides a method for preparing a thermally conductive film, which includes the following steps:
[0028]Step S1: polymerizing the organic polymer monomer and free radical initiator in an aqueous solution to obtain a first product.
[0029]In one embodiment, add 1 to 10 parts of organic polymer monomer to 50 to 200 parts of aqueous solution and stir at 20 to 95°C for 10 to 60 minutes to disperse the organic polymer monomer uniformly to obtain the organic polymer monomer Dispersions. Adding a free radical initiator to the organic polymer monomer dispersion to initiate polymerization of the organic polymer monomer, wherein the number of parts by which the free radical initiator initiates the polymerization of the organic polymer monomer is the mass part of the organic polymer monomer 0.1 to 2.0wt.‰ of the number; make the organic polymer monomer dispersion with the free radical initiator polymerize in a water bath at 20 to 90°C for 1 to 8 hours, and then add ammonia t...
Embodiment 1
[0061]Add 1.2 ml of acrylic acid and 1.25 g of acrylamide mixed organic polymer monomer to 100 ml of distilled water at room temperature, and heat and stir in a 35° C. water bath for 15 minutes to obtain a uniformly mixed organic polymer monomer dispersion. Weigh 0.02g each of potassium persulfate and sodium bisulfite, and add 2ml of distilled water to prepare an aqueous initiator solution. Take out 1 / 3 of each of the initiator aqueous solution, slowly drop it into the organic polymer monomer dispersion, stir and raise the temperature to 45°C, add the remaining initiator aqueous solution multiple times within 1 hour, and polymerize for 4 hours; After stirring down to room temperature, the pH value is quickly adjusted to 7-8 with an aqueous ammonia solution to obtain the first product.
[0062]Add 3g of graphite oxide to the first product, and use a high-pressure homogenizer for homogeneous dispersion, crushing and peeling, until graphene oxide with an average thickness of 0.4-0.7nm and...
Embodiment 2
[0067]Add 1.5 g of acrylic acid and 1.0 g of organic polymer monomer mixed with 1.0 g of methyl propyl butyl in 200 ml of distilled water at room temperature, and heat and stir in a 35° C. water bath for 15 minutes to obtain a uniformly mixed organic polymer monomer dispersion. Weigh 0.04 g of ammonium persulfate and add 4 ml of distilled water to prepare an aqueous initiator solution. Take out 1 / 3 of each of the initiator aqueous solution, slowly drop it into the organic polymer monomer dispersion, stir and raise the temperature to 45°C, add the remaining initiator aqueous solution multiple times within 1 hour, and polymerize for 4 hours; After stirring down to room temperature, the pH value is quickly adjusted to 7-8 with an aqueous ammonia solution to obtain the first product.
[0068]Add 8g of graphite oxide to the first product, and use a high-pressure homogenizer for homogeneous dispersion, crushing and peeling, until graphene oxide with an average thickness of 0.4-0.7nm and an a...
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