Annual-ring-shaped graphene organic silicon resin biomimetic composite material, and preparation method and application thereof
A biomimetic composite material and graphene technology are applied in the field of annual ring-shaped graphene silicone resin biomimetic composite materials and their preparation, and can solve the problems of low mechanical properties, difficult processing, insufficient thermal conductivity and the like
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Embodiment 1
[0038] Mix 10 grams of graphite, 10 grams of sodium nitrate, and 30 grams of potassium permanganate in a flask, add 300 milliliters of sulfuric acid, stir thoroughly for 6 hours, and keep the reaction temperature at 45 o c. After the reaction, add deionized water and raise the temperature to 90 o C for 15 minutes. After the solution is cooled to room temperature, add hydrogen peroxide and deionized water, wash with water three times, take out the product and dry it in a freeze dryer to obtain graphene oxide;
[0039](2) Put 6 grams of pyromellitic dianhydride and 6.5 grams of 4,4'-diaminodiphenyl ether into a flask protected by a nitrogen atmosphere, add dimethylacetamide, and o C was stirred for 5 hours. After the reaction was completed, deionized water was added to precipitate the precipitated product. After being cleaned with ion water, it is dried in a vacuum drying oven to obtain polyamic acid salt;
[0040] (3) Dissolve 4 grams of graphene and 1 gram of graphene oxi...
Embodiment 2
[0043] Example 2: The implementation method is the same as in Example 1, and the components of the graphene mixed slurry obtained in step (3) are changed to 3 grams of graphene and 2 grams of graphene oxide dissolved in deionized water, fully stirred evenly, and then ultrasonicated for 0.5 hours , and then add 0.5 grams of triethanolamine and 2 grams of polyamic acid salt according to the proportion, and the other components and quality remain unchanged.
Embodiment 3
[0044] Example 3: The implementation method is the same as in Example 1, and the components of the graphene mixed slurry obtained in step (3) are changed to 2 grams of graphene and 3 grams of graphene oxide dissolved in deionized water, fully stirred evenly, and then ultrasonicated for 0.5 hours , and then add 0.5 grams of triethanolamine and 2 grams of polyamic acid salt according to the proportion, and the other components and quality remain unchanged.
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