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Polyimide composite film and preparing method thereof

A technology of polyimide and composite film, which is applied in the field of polyimide composite film and its preparation, can solve the problems of increasing production costs, etc., and achieve the effects of low cost, improved mechanical properties, good stability and mechanical properties

Active Publication Date: 2016-11-23
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the microwave heating it adopts increases the production cost in the industrial production process

Method used

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  • Polyimide composite film and preparing method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A kind of polyimide composite film, obtains by following method:

[0053] (1) Modification of Halloysite:

[0054] ①Short-chain modifier modification: heat halloysite at 200°C for 10h, take 2.0g and disperse it into 100.0mL of ethanol and 15.0mL of ammonia water, stir at room temperature for 2h, raise the temperature to 60°C, add 1.0 mL of tetraethyl orthosilicate, continue to stir for 6h; filter the obtained slurry, wash with ethanol several times, and dry at 110°C for 12h to obtain short-chain modified halloysite;

[0055] ②Preparation of long-chain coupling agent hydrolyzate: add 1.0mL of γ-aminopropyltriethoxysilane to a mixture of 0.5mL of water and 10.0mL of ethanol for 1 hour, adjust the pH to 4 with anhydrous acetic acid, Stir for 1h to obtain a long-chain coupling agent hydrolyzate;

[0056] ③Long-chain coupling agent modification: take 2.0g of the short-chain modified halloysite obtained in step ① and disperse it in 100.0mL of ethanol, stir for 2h, and then ...

Embodiment 2

[0065] A kind of polyimide composite film, obtains by following method:

[0066] (1) Modification of Halloysite:

[0067] ①Short-chain modifier modification: Heat halloysite at 600°C for 5h, take 5.0g and disperse it into 160.0mL of ethanol and 18.0mL of ammonia water, stir at room temperature for 2h; raise the temperature to 60°C, add 3.0ml Tetraethyl orthosilicate, continue to stir for 6h; filter the obtained slurry, wash with ethanol several times, and dry at 110°C for 12h to obtain short-chain modified halloysite;

[0068] ②Preparation of long-chain coupling agent hydrolyzate: add 2.0mL of γ-aminopropylmethyldiethoxysilane to a mixture of 1.0mL water and 12.0mL ethanol for 1h, adjust the pH to 5. Stir for 1 hour to obtain a long-chain coupling agent hydrolyzate;

[0069] ③Long-chain coupling agent modification: Take 3.0g of the short-chain modified halloysite obtained in step ① and disperse it in 100.0mL of ethanol, stir for 2h, and then dissolve the hydrated γ-aminoprop...

Embodiment 3

[0076] A kind of polyimide composite film, obtains by following method:

[0077] (1) Modification of Halloysite:

[0078] ①Short chain modifier modification: heat halloysite at 1000°C for 1h, take 10.0g and disperse it into 200.0mL of ethanol and 20.0mL of ammonia water, stir at room temperature for 2h; raise the temperature to 60°C, add 10.0mL Tetraethyl orthosilicate, continue to stir for 6h; filter the obtained slurry, wash with ethanol several times, and dry at 110°C for 12h to obtain short-chain modified halloysite;

[0079] ②Preparation of long-chain coupling agent hydrolyzate: Add 3.5mL of γ-aminopropylmethyldiethoxysilane to a mixture of 2.0mL water and 15.0mL ethanol for 1h, and adjust the pH to 6. Stir for 1 hour to obtain a long-chain coupling agent hydrolyzate;

[0080] ③Long-chain coupling agent modification: Take 10.0g of the short-chain modified halloysite obtained in step ① and disperse it in 100.0mL of ethanol, stir for 2h, and then dissolve the hydrated γ-a...

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Abstract

The invention relates to a preparing method of a polyimide composite film. The method comprises the steps that modified layered silicate is added into a polyimide prepolymer, a polyimide polymer solution is obtained through polymerization and then is smeared on a substrate, heating and curing are carried out, and the polyimide composite film is obtained, wherein amino functional groups are carried on the surface of modified layered silicate. The thermal stability of the polyimide composite film provided with the preparing method is greatly improved, the thermal decomposition temperature can be increased by 25 DEG C, the mechanical property of the polyimide composite film is greatly improved, the tensile strength can reach 113.7 MPa, and the Young modulus can be enlarged to 2536 MPa. The polyimide composite film provided with the preparing method is simple in modification process and low in modification raw material cost.

Description

technical field [0001] The invention belongs to the field of polyimide modification, in particular to a polyimide composite film and a preparation method thereof. Background technique [0002] Polyimide refers to a class of polymers containing imide rings (-CO-NH-CO-) on the main chain. Due to the specific analytical structure of polyimide, it determines superior physical and chemical properties. It has Excellent thermal stability, chemical resistance, flame retardancy, electrical insulation and mechanical properties, it is one of the organic polymer materials with the best comprehensive performance. As a special engineering material, polyimide has been widely used in aviation, aerospace, microelectronics, nanometer, liquid crystal, separation membrane, laser and other fields. Polyimide film is one of the earliest products of polyimide, which is used for slot insulation of motors and wrapping materials for cables. [0003] With the continuous development of modern industry...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L79/08C08K9/04C08K9/06C08K9/02C08K3/34C08G73/10
Inventor 卢旭晨陈世伟王体壮
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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