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Hybrid film of polyimide modified by silicon dioxide tube, and preparation method

A technology of silica tube and polyimide, applied in the field of polymer-based nanocomposite materials and its preparation, can solve the problems that the particles cannot meet the use requirements, and achieve the effects of easy popularization and application, low cost and simple method

Inactive Publication Date: 2006-04-19
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] The purpose of the present invention is to overcome the defect that the prior art can only use silicon dioxide particles to modify the polyimide film and the defects that the particles cannot meet certain requirements for use. The silicon dioxide nanotubes prepared by self-assembly technology are The polyimide film is modified to obtain a new type of polyimide hybrid film material with adjustable dielectric properties used in a wide temperature range

Method used

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  • Hybrid film of polyimide modified by silicon dioxide tube, and preparation method
  • Hybrid film of polyimide modified by silicon dioxide tube, and preparation method
  • Hybrid film of polyimide modified by silicon dioxide tube, and preparation method

Examples

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Comparison scheme
Effect test

Embodiment 1

[0048] 1) Dissolve the alkyl sulfonate cationic surfactant in the solution of water and ethanol, the molar concentration by volume is 5mmol / L~25mmol / L, preferably 5mmol / L~8mmol / L, make template aqueous solution and Add 0.1mol / L-3mol / L silicate under stirring, and stand at 15-40°C for 40 minutes to self-assemble; add 1mol / L-5mol / L, preferably 2mol / L, into the mixed solution ~3mol / L of 25~28% (weight percent concentration) concentrated ammonia water was left standstill for 20-70 minutes, and the product obtained was separated with an experimental sieve or a filter membrane, and after washing with a large amount of water, a white powdery material was obtained, which was observed under an electron microscope as super Fine silicon dioxide tubular material with a diameter of 30-350 nanometers and a hollow tube shape. See figure 1 ;

[0049] 2) After the powdery material is naturally dried, it is weighed according to the ratio of 1-3% of the resin content, and then added to a solut...

Embodiment 2

[0053] According to the steps of Example 1, 4 mmol succinic acid was dissolved in the solution of water and ethanol, and the template material solution was prepared under stirring, and its mass molar concentration was 6 mmol / kg; 0.1 mol / L~3 mol / L silicon Ester, stand at 15-40°C for self-assembly for 40 minutes; add 25-28% (weight percentage concentration) concentrated ammonia water of 2mol / L-3mol / L to the mixed solution and let it stand for 20-70 minutes , The obtained product is separated by an experimental sieve or a filter membrane, and washed with a large amount of water to obtain a white powdery material, which is observed under an electron microscope as an ultrafine silica tubular material with a diameter of 40-50 nanometers and a hollow tube shape. See figure 2 .

[0054] 2) After the powdery material is naturally dried, it is weighed according to the ratio of 3-5% of the resin content, and then added to a solution of a coupling agent with a certain concentration and ...

Embodiment 3

[0058] According to the steps of Example 1, dissolve 3mmol tartaric acid in the solution of water and ethanol, and prepare template material solution under stirring, and its mass molar concentration is 6mmol / kg; add 0.1mol / L~3mol / L silicic acid under stirring Esters, stand at 15-40°C for self-assembly for 40 minutes; add 25-28% (weight percent concentration) of 2.5mol / L-3.5mol / L concentrated ammonia water to the mixed solution and let it stand for 20-70 Minutes, the obtained product is separated with an experimental sieve or a filter membrane, and washed with a large amount of water to obtain a white powdery material, which is observed under an electron microscope as an ultrafine silica tubular material with a diameter of 80-300 nanometers and a hollow tube shape. See figure 1 .

[0059] 2) After the powdery material is naturally dried, it is weighed according to the ratio of 10% of the resin content, and then added to a solution of a coupling agent with a certain concentrati...

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Abstract

A SiO2 nanotube modified polyimide hybridized film with adjustable dielectric constant is prepared through proportionally adding SiO2 nanotubes to the solution of coupling agent, stirring while reaction, adding ODA monomer, ultrasonic dispersing, stirring while adding PMDA monomer, in-situ polymerizing reaction, coating it on glass plate, drying in the air, putting it in oven, and thermal iminating.

Description

field of invention [0001] The invention belongs to the technical field of polymer-based nanocomposite materials and their preparation, and in particular relates to a silicon dioxide nanotube-modified polyimide hybrid film and a preparation method thereof. Background technique [0002] As a special engineering plastic film, polyimide film is called "golden film". It is obtained by polycondensation of pyromellitic dianhydride and diaminodiphenyl ether in a highly polar solvent and then formed into a film. special polymer films. Due to its excellent high and low temperature resistance, high strength, high insulation, low dielectric constant and low dielectric loss, low thermal expansion coefficient, radiation resistance, and medium resistance, polyimide film can be used at -269°C to 250°C It has been widely used in high-tech fields such as aviation, aerospace, microelectronics, electrical, energy, transportation and other high-tech fields, especially for high-temperature insul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/12C08J5/18C08K5/541
Inventor 张以河付绍云李元庆李来风李明
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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