High-transparence low-expansibility polyimide film as well as preparation method and application thereof
A technology of polyimide film and polyimide resin, which is applied in the field of high transparency and low expansion polyimide film and its preparation, can solve the problem of high light transmittance and low thermal expansion coefficient of polyimide film, etc. problems, to achieve the effect of meeting the device processing requirements, increasing the doping amount, reducing agglomeration and phase separation
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Embodiment 1
[0052] Embodiment 1, the preparation of polyimide hybrid film PIPH-5% (doping amount 5wt%)
[0053] (1) Synthetic polyimide resin
[0054] For the synthesis steps and conditions of the polyimide resin, refer to the relevant part of Comparative Example 1.
[0055] (2) Doped perhydropolysilazane
[0056] In a three-neck flask equipped with a mechanical stirrer and a thermometer, add a perhydropolysilazane / dichloromethane solution with a solid content of 20 wt%, vacuum and depressurize at 50°C, and slowly remove the solvent dichloromethane until a colorless Transparent viscous liquid or solid. Take the perhydropolysilazane and the polyimide resin prepared in step (1), and dissolve them in N-methylpyrrolidone (NMP) to obtain organic solutions with solid contents of 5 wt% and 20 wt%, respectively. Take 2.24 grams of the above-prepared perhydropolysilazane solution, slowly add it to 10.64 grams of polyimide solution, stir and mix rapidly at room temperature, and defoam under vacu...
Embodiment 2
[0059] Embodiment 2, the preparation of polyimide hybrid film PIPH-10% (doping amount 10wt%)
[0060] (1) Synthetic polyimide resin
[0061] For the synthesis steps and conditions of the polyimide resin, refer to the relevant part of Comparative Example 1.
[0062] (2) Doped perhydropolysilazane
[0063] In a three-neck flask equipped with a mechanical stirrer and a thermometer, add a perhydropolysilazane / dichloromethane solution with a solid content of 30% by weight, vacuum and reduce pressure at 40°C, and slowly remove the solvent dichloromethane until a colorless Transparent viscous liquid or solid. Take perhydropolysilazane and the polyimide resin prepared in step (1), and dissolve them in N,N-dimethylacetamide (DMAc) respectively to prepare organic solutions with solid contents of 5wt% and 15wt%. Take 5 grams of the above-prepared perhydropolysilazane solution, slowly add it to 15 grams of polyimide solution, stir and mix rapidly at room temperature, and defoam under v...
Embodiment 3
[0066] Embodiment 3, the preparation of polyimide hybrid film PIPH-15% (doping amount 15wt%)
[0067] (1) Synthetic polyimide resin
[0068] For the synthesis steps and conditions of the polyimide resin, refer to the relevant part of Comparative Example 1.
[0069] (2) Doped perhydropolysilazane
[0070] In a three-neck flask equipped with mechanical stirring and a thermometer, add a perhydropolysilazane / dichloromethane solution with a solid content of 15% by weight, vacuum and reduce pressure at 50°C, and slowly remove the solvent dichloromethane until a colorless Transparent viscous liquid or solid. Take the perhydropolysilazane and the polyimide resin prepared in step (1), and dissolve them in N-methylpyrrolidone (NMP) to obtain organic solutions with solid contents of 4 wt% and 25 wt%, respectively. Take 10 grams of the above-prepared perhydropolysilazane solution, slowly add it to 9.07 grams of polyimide solution, stir and mix rapidly at room temperature, and defoam un...
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