High-dielectric-constant polyimide film provided with multiwalled carbon nanotubes and preparation method of high-dielectric-constant polyimide film
A technology of multi-walled carbon nanotubes and polyimide, applied in the field of functional polymer materials, can solve the problem of cumbersome processing methods, complex chemical reactions, and unfavorable large-scale production and application of polyimide composite materials with high dielectric constant and other problems, to achieve the effect of simple operation, simple preparation process and good application prospects
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Embodiment 1
[0025] A: Add 4.27544 g of 4,4'-diaminodiphenyl ether into 70 ml of N,N'-dimethylacetamide and stir slowly to dissolve it. After dissolving, place the reaction device in an ice-water bath. Then take by weighing 4.70683 grams of pyromellitic dianhydride in the weighing bottle and add in the above-mentioned solution in batches, each time add 1 / 3rd of the remaining drug amount, add the material once every ten minutes, reduce the stirring speed when adding the material, Increase stirring speed between additions. One hour later, the feeding was completed, and 2.0 ml of triethylamine was slowly added into the reaction system, and the reaction was continued for 3 to 4 hours after completion.
[0026] B: Take 9.570 grams of the above polyamic acid salt solution, add 0.143 grams of multi-walled carbon nanotube aqueous dispersion to it and stir and mix at high speed for 7-8 hours, then stop stirring and let it stand for 5 minutes to defoam. Coat the film with a glass rod on a dry clean...
Embodiment 2
[0029] A: Add 3.50212 grams of 4,4'-diaminodiphenyl ether into 70 ml of N,N'-dimethylacetamide and stir slowly to dissolve it. After dissolving, place the reaction device in an ice-water bath. Then weigh 5.47987 grams of 3,3',4,4'-diphenyl ether tetra-acid dianhydride in the weighing bottle and add it to the above solution in batches, adding one-third of the remaining drug amount each time, every ten Feed once every minute, reduce the stirring speed when feeding, and increase the stirring speed between feeding intervals. One hour later, the addition was completed, and 1.6 ml of triethylamine was slowly added to the reaction system, and the reaction was continued for 3 to 4 hours after completion.
[0030] B: Take 9.206 grams of the above polyamic acid salt solution, add 0.137 grams of multi-walled carbon nanotube aqueous dispersion to it and stir and mix at high speed for 7-8 hours, then stop stirring and let it stand for 5 minutes to defoam. Coat the film with a glass rod on...
Embodiment 3
[0033] A: Add 3.61590 g of 4,4'-diaminodiphenyl ether into 70 ml of N,N'-dimethylacetamide and stir slowly to dissolve it. After dissolving, place the reaction device in an ice-water bath. Then weigh 5.36610 grams of 3,3'4,4'-biphenyltetracarboxylic dianhydride in the weighing bottle and add it to the above solution in batches, adding one-third of the remaining drug amount each time, every ten minutes Add the material once, reduce the stirring speed when adding the material, and increase the stirring speed during the feeding interval. One hour later, the addition was completed, and 1.6 ml of triethylamine was slowly added to the reaction system, and the reaction was continued for 3 to 4 hours after completion.
[0034] B: Take 9.832 grams of the above polyamic acid salt solution, add 0.146 grams of multi-walled carbon nanotube aqueous dispersion to it and stir and mix at high speed for 7-8 hours, then stop stirring and let it stand for 5 minutes to defoam. Coat the film with ...
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Abstract
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