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High temperature resistant polyetherimide based composite foam material and preparation method thereof

A polyetherimide-based, composite foam technology, applied in the field of polymer synthesis and processing, can solve problems such as easy agglomeration, strong van der Waals force, and weak action

Active Publication Date: 2020-04-03
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Graphene with a complete structure is composed of benzene rings, with high chemical stability, inert surface, and weak interaction with other media; and there is strong van der Waals force between graphene sheets, which is easy to agglomerate, which greatly limits its research and application; how to use efficient A simple and easy-to-implement method to achieve good dispersion of graphene in the polyetherimide matrix is ​​the key to the preparation of high-performance polyetherimide / graphene nanocomposite foams

Method used

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  • High temperature resistant polyetherimide based composite foam material and preparation method thereof
  • High temperature resistant polyetherimide based composite foam material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Disperse 1g of graphene oxide in 100g of N,N-dimethylacetamide, add 0.12g of aminopropyl polydimethylsiloxane at room temperature and stir evenly, and disperse with ultrasonic wave for 30min, the ultrasonic power is 600W, frequency The ultrasonic temperature is 10000Hz, and the ultrasonic temperature is 50°C to obtain a coupling-treated graphene solution; under the protection of nitrogen, dissolve 4.2g p-phenylenediamine in the above solution, and then add 20g bisphenol A diether dianhydride and 1g POSS In this solution, react under ice bath conditions for 6 hours to obtain viscous polyamic acid; add 60g of acetic anhydride to dehydrate and form a ring, react at 65°C for 5 hours, stir and cool to room temperature, and add methanol with a volume ratio of 1:1 Mix 200ml of solvent with water, strengthen the stirring, the polymer precipitates out, filter with suction, and dry to obtain the polyetherimide-based composite material;

[0023] Weigh 10g of the above polyetherimi...

Embodiment 2

[0025] Disperse 10g of graphene oxide in 350g of N,N-dimethylacetamide, add 1.32g of aminopropyl polydimethylsiloxane at room temperature and stir evenly, use ultrasonic dispersion for 60min, ultrasonic power is 800W, frequency The ultrasonic temperature is 60000Hz, and the ultrasonic temperature is 75°C to obtain a coupling-treated graphene solution; under the protection of nitrogen, dissolve 18.8g of 4,4'-diaminodiphenyl ether in the above solution, and then dissolve 50g of bisphenol A diether Add dianhydride and 5g POSS to the solution, react under ice bath conditions for 8 hours to obtain viscous polyamic acid; add 225g acetic anhydride to dehydrate and form a ring, react at 70°C for 7 hours, stir and cool to room temperature, add volume Ratio is 200ml of methanol and water mixed solvent of 1:1, strengthen stirring, the polymer precipitates out, suction filtration, drying, obtain polyetherimide-based composite material;

[0026] Weigh 10g of the above-mentioned polyetherim...

Embodiment 3

[0028] Disperse 2.1g of graphene oxide in 1000g of N,N-dimethylacetamide, add 4.38g of aminopropyl polydimethylsiloxane at room temperature and stir evenly, use ultrasonic dispersion for 100min, and the ultrasonic power is 2000W, The frequency is 80000Hz, the ultrasonic temperature is 90°C, and the coupling treatment graphene solution is obtained; under the protection of nitrogen, 14.2g of propylenediamine is dissolved in the above solution, and then 100g of bisphenol A diether dianhydride and 20g of POSS are added In this solution, react under ice bath conditions for 4 hours to obtain viscous polyamic acid; add 500g of acetic anhydride to dehydrate and form a ring, react at 90°C for 6 hours, stir and cool to room temperature, add methanol with a volume ratio of 1:1 Mix 200ml of solvent with water, strengthen the stirring, the polymer precipitates out, filter with suction, and dry to obtain the polyetherimide-based composite material;

[0029] Weigh 10g of the above-mentioned ...

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Abstract

The invention discloses a high-temperature-resistant polyetherimide-based composite foam material and a preparation method thereof. The preparation method is characterized in that graphene oxide is modified with a polysiloxane intercalation layer containing reactive end groups and uniformly dispersed in polyetherimide synthesizing monomers, besides, high-temperature-resistant POSS (polyhedral oligomeric silsesquioxane) with the nano size is added, and a polyetherimide / graphene / POSS nanocomposite is prepared with an in-situ polymerization method; a microporous foaming nanocomposite is preparedwith a water vapor inductive phase separation method, so that the high-temperature resistance and the thermodynamic stability of polyetherimide foam are improved.

Description

technical field [0001] The invention relates to a high-temperature-resistant polyetherimide-based composite foam material and a preparation method thereof, belonging to the field of polymer synthesis and processing. Background technique [0002] Polyetherimide is a kind of non-crystalline thermoplastic polymer obtained by introducing ether bonds into the main chain of polyimide molecules. Its molecular structure contains both aromatic amine functional groups and ether structures. Therefore, it not only has High temperature, high strength, high modulus and corrosion resistance, and has good processing performance, can be molded by injection and other methods. Therefore, polyetherimide is one of the preferred materials for high-performance thermoplastic foams. The foam material Excellent mechanical properties, light weight, very high specific strength, specific modulus, excellent fatigue resistance, and can meet strict flame retardant requirements, smokeless, non-toxic, so it ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L79/08C08L83/08C08L83/06C08K9/04C08K3/04C08G73/10C08J9/28
Inventor 叶林孙雪洁赵晓文
Owner SICHUAN UNIV