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A kind of preparation method of rare earth doping modified polyimide film

A technology of polyimide film and rare earth doping, which is applied in the field of insulating materials to achieve the effects of improving dispersion, improving compatibility and good electrical and mechanical properties

Active Publication Date: 2022-03-25
JIAXING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with traditional polymers, nanomaterials can not only comprehensively improve the comprehensive properties of polymers, but also endow them with unique properties; however, the research, development and application of nano-inorganic particles in the high-performance modification of polymers are still in their infancy. At this stage, further research on theoretical and practical issues in this field is needed

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  • A kind of preparation method of rare earth doping modified polyimide film
  • A kind of preparation method of rare earth doping modified polyimide film

Examples

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Embodiment 1

[0015] A kind of preparation method of the polyimide film of rare earth doping modification, it is characterized in that, comprises the following steps:

[0016] S1. Add butyl titanate dropwise to the ethanol solution containing ethyl acrylate, and then add Y 2 o 3 ethanol solution, then add a concentration of 20wt% hydrochloric acid ethanol solution, mix and stir at room temperature for 3-8h and then stand still to obtain yttrium-doped TiO 2 Sol;

[0017] S2. Will prepare TiO 2 Put the sol in an oven to dry, grind it into gel powder, heat it up to 200°C at 3°C / min in a muffle furnace, keep it warm for 30 minutes, and then raise the temperature to 500°C at a rate of 5°C / min to obtain yttrium-doped TiO2 Nano powder;

[0018] S3. Add yttrium-doped TiO2 nanopowder and 4,4'-diaminodiphenyl ether to N,N-dimethylacetamide, sonicate for 1h, then add pyromellitic dianhydride in 3 times and stir for 8h to obtain PAA / nanoparticle slurry, wherein, the molar ratio of 4,4'-diaminodiph...

Embodiment 2

[0021] A kind of preparation method of the polyimide film of rare earth doping modification, it is characterized in that, comprises the following steps:

[0022] S1. Add butyl titanate dropwise to the ethanol solution containing ethyl acrylate, and then add Y 2 o 3 ethanol solution, then add a concentration of 25wt% hydrochloric acid ethanol solution, mix and stir at room temperature for 3-8h and then stand still to obtain yttrium-doped TiO 2 Sol;

[0023] S2. Will prepare TiO 2 Put the sol in an oven to dry, grind it into gel powder, heat up to 200°C at 5°C / min in a muffle furnace, keep it warm for 60 minutes, and then raise the temperature to 500°C at a rate of 8°C / min to obtain yttrium-doped TiO2 Nano powder;

[0024] S3. Add yttrium-doped TiO2 nanopowder and 4,4'-diaminodiphenyl ether to N,N-dimethylacetamide, sonicate for 1h, then add pyromellitic dianhydride in 3 times and stir for 4h to obtain PAA / nanoparticle slurry, wherein, the molar ratio of 4,4'-diaminodipheny...

Embodiment 3

[0027] A kind of preparation method of the polyimide film of rare earth doping modification, it is characterized in that, comprises the following steps:

[0028] S1. Add butyl titanate dropwise to the ethanol solution containing ethyl acrylate, and then add Y 2 o 3 ethanol solution, and then add a concentration of 22wt% hydrochloric acid ethanol solution, mix and stir at room temperature for 3-8h and then stand still to obtain yttrium-doped TiO 2 Sol;

[0029] S2. Will prepare TiO 2 Put the sol in an oven to dry, grind into gel powder, heat up to 200°C at 4°C / min in a muffle furnace, keep it warm for 50 minutes, and then raise the temperature to 500°C at a rate of 6°C / min to obtain yttrium-doped TiO2 Nano powder;

[0030] S3. Add yttrium-doped TiO2 nanopowder and 4,4'-diaminodiphenyl ether into N,N-dimethylacetamide, ultrasonicate for 1h, then add pyromellitic dianhydride in 3 times and stir for 6h to obtain PAA / nanoparticle slurry, wherein, the molar ratio of 4,4'-diamin...

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Abstract

The present invention provides a kind of preparation method of rare earth doped modified polyimide film, comprises the following steps: S1. prepare the TiO of yttrium doping 2 Sol; S2. Preparation of yttrium-doped TiO2 nanopowder; S3. Adding yttrium-doped TiO2 nanopowder and 4,4'-diaminodiphenyl ether into N,N-dimethylacetamide, and then adding in 3 times Stir pyromellitic dianhydride to obtain PAA / nanoparticle slurry; S4. Apply the slurry prepared in step S3 on a glass plate, after standing, put it in a vacuum oven to evacuate to remove air bubbles, and finally put it into the air blast Oven, realize imidization by gradient temperature rise, and prepare rare earth doped modified polyimide film. The polyimide film prepared by the invention has good aging resistance and good dielectric properties.

Description

technical field [0001] The invention relates to the field of insulating materials, in particular to a preparation method of a polyimide film modified by rare earth doping. Background technique [0002] Corona discharge has various effects in the field of engineering technology. Corona occurs on the wires of high-voltage and ultra-high-voltage transmission lines in the power system, which will cause corona power loss, radio interference, etc. For high-voltage electrical equipment, corona discharge will gradually destroy the insulation performance of the equipment. The development of nanotechnology has brought a broad space to nanomaterials science, and the research on organic / inorganic nano-hybrid materials has received great attention. Organic / inorganic nanocomposites can be used not only as structural materials but also as functional materials. It is an important subject with great application research value in the field of nanotechnology. Compared with traditional polym...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L79/08C08K3/22C08J5/18C08G73/10
CPCC08J5/18C08G73/1007C08G73/1071C08J2379/08C08K2201/011C08K2003/2241
Inventor 沈丽尧
Owner JIAXING UNIV
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