Polymer composite material with high dielectric constant and low dielectric loss and preparation method thereof
A technology of high dielectric constant and composite materials, applied in the field of dielectric polymer composite materials and their preparation, can solve the problems of low dielectric constant, increased dielectric loss, cumbersome preparation steps, etc., and achieves low cost and processability. Good, high breakdown strength effect
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Embodiment 1
[0052] First add phenyltriethoxysilane (4mmol) to 10mL of anhydrous tetrahydrofuran and stir at room temperature until the monomer is completely dissolved, and then add 0.13 times the molar amount of tetramethylammonium fluoride based on phenyltriethoxysilane. The hydrate (TMAF, 0.52mmol) was dissolved in 3.5mL of anhydrous tetrahydrofuran, then the two solutions were mixed and stirred at room temperature for 24 hours to obtain a yellow solution. The solution was concentrated by rotary evaporation and dissolved with a small amount of chloroform, and then added dropwise to methanol The white powder product is obtained by sedimentation. The product is filtered, washed three times, and dried to obtain the final product—the peripheral cation is tetramethylammonium, and the R group is eight phenyl groups containing fluoride ion POSS (Ph 8 POSS@F - ) Molecules with a yield of 60.7%.
Embodiment 2
[0054] First add vinyltrimethoxysilane (1mmol) and phenyltrimethoxysilane (3mmol) with a molar ratio of 2 / 6 to 10mL of anhydrous tetrahydrofuran and stir at room temperature until the monomers are completely dissolved, and then combine the previous two monomers 0.16 times the molar amount of tetrabutylammonium fluoride trihydrate (TBAF, 0.64mmol) was dissolved in 4mL of anhydrous tetrahydrofuran, then the two solutions were mixed and stirred at room temperature for 36 hours to obtain a yellow solution. The solution was evaporated After concentration, it is dissolved in a small amount of chloroform, and then added dropwise to methanol to settle to obtain a white powder product. The product is filtered by suction, washed three times, and dried to obtain the final product—the peripheral cation is tetrabutylammonium, and the R group is 2 vinyl groups. , 6 phenyl groups containing fluoride ion POSS (Vi 2 Ph 6 POSS@F - ) Molecules with a yield of 51.1%.
Embodiment 3
[0056] First add vinyltriethoxysilane (1.5mmol) and phenyltriethoxysilane (2.5mmol) with a molar ratio of 3 / 5 to 10mL of anhydrous tetrahydrofuran and stir at room temperature until the monomer is completely dissolved. 0.5 times the molar amount of tetrabutylammonium fluoride trihydrate (TBAF, 2.0mmol) based on the two monomers was dissolved in 5mL of anhydrous tetrahydrofuran, then the two solutions were mixed and stirred at room temperature for 48 hours to obtain a yellow solution After the solution is concentrated by rotary evaporation, it is dissolved in a small amount of chloroform, and then added dropwise to methanol to settle to obtain a white powder product. The product is filtered by suction, washed three times, and dried to obtain the final product—the peripheral cation is tetrabutylammonium, and the R group is 3 vinyl groups, 5 phenyl groups containing fluoride ion POSS (Vi 3 Ph 5 POSS@F - ) Molecule with a yield of 49.0%.
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Abstract
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