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Inorganic nano combined fiber reinforced polyimide composite material and its preparing method

A polyimide and fiber-reinforced technology, which is applied in the field of inorganic nanocomposite fiber-reinforced polyimide composite materials and its preparation, can solve the problems of affecting the performance of materials and the brittleness of composite materials

Inactive Publication Date: 2005-12-21
NINGBO ANLI ELECTRON MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this method, due to the formation of a spatial network cross-linked structure, the composite material is more brittle, which in turn affects the actual performance of the material.

Method used

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  • Inorganic nano combined fiber reinforced polyimide composite material and its preparing method
  • Inorganic nano combined fiber reinforced polyimide composite material and its preparing method
  • Inorganic nano combined fiber reinforced polyimide composite material and its preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Unidirectional carbon fiber reinforced polyimide composites were prepared by ODPA / 3,4'-ODA system.

[0071] (1) Preparation of polyamic acid solution compounded with inorganic nanoparticles.

[0072] First, the nano-TiO treated by plasma for 10 min 2 The particles were dissolved in DMAc solvent, and mechanically stirred for 2 hours in the case of ultrasonic-assisted dispersion to obtain a suspension solution in which nanoparticles were uniformly dispersed; then, 0.100 mol of diamine 3,4 was added to the DMAc suspension containing nanoparticles '-ODA to dissolve completely; then, add 0.0981mol dianhydride ODPA to the mixed solution, stir mechanically to make it fully react with 3,4'-ODA, and use an ice-water bath to ensure that the reaction temperature is controlled at 0-25°C ; After 8 hours of sufficient reaction, the final polyimide Mn = 25000, solid content of 20 wt%, polyamic acid solution composited with inorganic nanoparticles.

[0073] (2) Preparation of fiber-r...

Embodiment 2

[0076] Preparation of unidirectional carbon fiber reinforced polyimide composites with BPDA / 3,4'-ODA system.

[0077] According to the same method as in Example 1, first use 0.0982mol of BPDA and 0.100mol of 3,4'-ODA as monomers, in the DMAc suspension containing nanoparticles, prepare the final polyimide Mn = 25000, and polyamic acid solution compounded with inorganic nanoparticles. The polyimide preformed film is obtained through far-infrared imidization at 200°C. The polyimide preformed film is filled with 0.1wt% of carbon nanotubes, so that the polyimide preformed film has high modulus, high strength and antistatic properties. The preformed film and carbon fiber (M40B) layers are cut and laminated alternately, placed in a mold and molded on a hot press. The specific process is: directly rise from room temperature to 280°C, keep warm for one hour, and exhaust 3 times; raise the temperature from 280°C to 300°C, start to pressurize during the heating process, the pressure i...

Embodiment 3

[0079] Unidirectional carbon fiber reinforced polyimide composites were prepared by BTDA / 3,4'-ODA system.

[0080] According to the same method as in Example 1, first with 0.09838mol of BTDA and 0.100mol of 3,4'-ODA as monomers, in the DMAc suspension containing nanoparticles, the final polyimide Mn=30000 was prepared, and a polyamic acid solution compounded with inorganic nanoparticles. The polyimide preformed film is obtained through thermal imidization at 200°C. The polyimide preformed film is filled with 1.0wt% nanometer AlN particles, so that the polyimide preformed film has high modulus, high strength and thermal conductivity. The preformed film and carbon fiber (T700) layers are cut and laminated alternately, placed in a mold and molded on a hot press. The specific process is: directly rise from room temperature to 270°C, keep warm for one hour, and exhaust 3 times; heat up from 270°C to 300°C, start to pressurize during the heating process, the pressure is 2-10MPa, a...

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Abstract

The invention provides a kind of fibre strengthening polyimide compound material of inorganic nano particle and its producing method. In the premonitory body solution, make aliphatic homopolymerized polyimide, aromatic homopolymerized polyimide, aliphatic copolymerized polyimide and aromatic copolymerized polyimide have in-situ polymerization, then compound with fibre layer in the form of polyamide acid solution, polyimide powder or polyimide beforehand molding membrane obtained by compounding, and adopt heat mould pressing method to produce polyimide compound material strengthened by seriate fibre. It has good apparent performance, toughness, interface intensity and thermal stability. The compounding of inorganic nanometer particles can improve the match ability between organic phase and inorganic phase, and endue polyimide with low heat expansibility, low water absorbability and high thermal conductivity.

Description

technical field [0001] The invention relates to an inorganic nanocomposite fiber-reinforced polyimide composite material and a preparation method thereof. Background technique [0002] Polyimide has been widely used as films, coatings, advanced composite resin matrix, engineering plastics and adhesives due to its excellent high and low temperature resistance, good mechanical properties, and radiation resistance. There are many varieties of polyimide, and the synthesis method is flexible, and the monomer can be selected according to various application purposes. Therefore, its application in structural materials and insulating materials is constantly expanding, and its functional application is also emerging. [0003] Fiber-reinforced polyimide composites have been widely used as structural materials in the aerospace field due to their excellent heat resistance and mechanical properties. Moreover, fiber-reinforced polyimide composite materials are a large category of fiber-r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/08
Inventor 詹茂盛鲁云华
Owner NINGBO ANLI ELECTRON MATERIAL
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