High-temperature-resistant polyimide aerogel structure honeycomb and preparation method thereof

A technology of polyimide and airgel, which is applied in the field of polyimide airgel and its preparation, can solve the problems of low density, high heat resistance and good surface quality, achieve good molding quality, increase heat distortion temperature, The effect of high heat resistance

Active Publication Date: 2022-07-29
INST OF PETROCHEM HEILONGJIANG ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention solves the problem that the existing polyimide airgel structure honeycomb is difficult to form low density, high heat resistance and good surface quality, and then provides an ultra-thin polyimide airgel

Method used

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  • High-temperature-resistant polyimide aerogel structure honeycomb and preparation method thereof
  • High-temperature-resistant polyimide aerogel structure honeycomb and preparation method thereof
  • High-temperature-resistant polyimide aerogel structure honeycomb and preparation method thereof

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specific Embodiment approach 1

[0028] Embodiment 1: A high temperature resistant polyimide aerogel structure honeycomb of this embodiment is prepared from tertiary amine, aromatic diamine, aromatic dianhydride and solvent; the aromatic diamine and aromatic The molar ratio of dianhydride is 1:(0.9~1.2);

[0029] The aromatic diamine is composed of a diamine containing an imidazole structure and a diamine containing a sulfone structure, and the mass ratio of the diamine containing an imidazole structure to the diamine containing a sulfone structure is 1:(0.2-0.4); The diamine containing imidazole structure is 5-amino-2-(4-aminophenyl) benzimidazole; the diamine containing sulfone structure is 4,4'-bis(3-aminophenoxy) diphenyl sulfone;

[0030] Described aromatic dianhydride is 2,3,3',4'-biphenyltetracarboxylic dianhydride;

[0031] The structural formula of the polyimide repeating unit in the described high temperature resistant polyimide aerogel structure honeycomb is:

[0032]

[0033] Said n:m=1:(0.2...

specific Embodiment approach 2

[0039]Embodiment 2: The difference between this embodiment and Embodiment 1 is that the solvent is water; the mass ratio of the aromatic diamine to the solvent is 1:(2-20). Others are the same as the first embodiment.

specific Embodiment approach 3

[0040] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the tertiary amines are triethylamine, trialkyl tertiary amine, octadecyldimethyl tertiary amine and dodecyl amine. One or a mixture of several alkyl dimethyl tertiary amines; the molar ratio of the aromatic diamine to the tertiary amine is 1:(0.05-2). Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a high-temperature-resistant polyimide aerogel structure honeycomb and a preparation method thereof, and relates to polyimide aerogel and a preparation method thereof. The problems that an existing polyimide aerogel structure honeycomb is difficult to form low density, high heat resistance and good surface quality are solved. The high-temperature-resistant polyimide aerogel structure honeycomb is prepared from tertiary amine, aromatic diamine, aromatic dianhydride and a solvent. The preparation method comprises the following steps: 1, weighing; 2, gelling the polyimide precursor solution; 3, preparing an aerogel structure honeycomb precursor; and 4, carrying out thermal imidization. The invention is used for preparing the high-temperature-resistant polyimide aerogel structure honeycomb.

Description

technical field [0001] The present invention relates to a polyimide aerogel and a preparation method. Background technique [0002] The fabrication of high temperature resistant honeycomb / composite interlayers in lightweight structures has become an important development direction in the design and fabrication of high-speed aircraft materials. At present, commercial products include: metal aluminum honeycomb, Nomex paper honeycomb, Kelver paper honeycomb, etc., which can no longer meet the requirements of high temperature resistant honeycomb. [0003] Polyimide is an aromatic heterocyclic polymer containing imide rings in repeating structural units. It is the polymer material with the highest heat resistance and the highest bulk strength used in the industrial field so far. The polyimide honeycomb HRH327 (Hexcel Company), which is made of it and glass cloth, has high mechanical properties and heat resistance (250 ° C), and is currently the commercialized lightweight structu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/10C08J9/28C08L79/08
CPCC08G73/1085C08G73/1064C08J9/28C08J2379/08C08J2201/0482C08J2205/026
Inventor 刘长威王德志曲春艳周东鹏范旭鹏宿凯程羽李洪峰赵立伟杨海冬肖万宝冯浩张杨刘成臻
Owner INST OF PETROCHEM HEILONGJIANG ACADEMY OF SCI
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