A kind of method for preparing high dielectric film
A high-dielectric, composite film technology, applied in the field of electronic functional materials, can solve the problems of high dielectric breakdown strength, low dielectric constant value, difficult to process thin films, etc., and achieve excellent mechanical properties, high dielectric constant value, low cost effect
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Embodiment 1
[0052] Weigh 500g polyvinylidene fluoride powder and 100g N,N-dimethylformamide ball mill and mix for 8-10h. The organic dielectric main material A is fully mixed with N, N-dimethylformyl to obtain the first slurry; the first slurry is subjected to vacuum static aging treatment for 2 to 4 hours, and the gel state composite material Film sample 1 (pure polyvinylidene fluoride film, no compounding) was obtained by heating extrusion, cooling and quenching, bidirectional film drawing, and heat setting.
Embodiment 2
[0054] Weigh 500g of polyvinylidene fluoride powder and 100g of N,N-dimethylformamide ball mill and mix for 1-4h. Make polyvinylidene fluoride powder and N,N-dimethylformyl fully mixed to obtain the first slurry; weigh 25g of polyprothoquinone and mix it with 100g of ethanol, and ultrasonically treat it for 1 to 4 hours to make polyprothoquinone Uniformly disperse in ethanol to obtain the second slurry; ball mill and mix the first slurry and the second slurry for 8-10 hours, so that the mixed slurry is fully and uniformly mixed to obtain the third slurry; vacuum the third slurry After aging treatment for 2-4 hours, the gel-state composite material was heated and extruded, cooled and quenched, bidirectionally stretched, and heat-set to obtain film sample 2 (polyvinylidene fluoride / polyhydroquinone composite film).
Embodiment 3
[0056] Weigh 500g polyethersulfone powder and 100g acetone ball mill and mix for 8-10h. The polyether sulfone and acetone are fully mixed to obtain the first slurry; the first slurry is subjected to vacuum standing and aging treatment for 2 to 4 hours, and the gel state composite material is heated and extruded, cooled and quenched, and bidirectionally drawn. Film and heat setting to obtain film sample 3 (pure polyethersulfone film, no compounding).
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