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Anisotropic material of polyimide

A polyimide anisotropic and heterogeneous material technology, which is applied in the field of preparation of polymer/carbon tube composite film materials, can solve the problems of waste of resources, etc., and achieve the effect of low filler consumption and simple preparation method

Inactive Publication Date: 2017-09-22
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the anisotropic materials currently prepared are anisotropic in the plane and vertical directions, and only when a large amount of filler is added can they show anisotropy, which wastes resources.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Carbon tube membrane modification: Add 0.01 mol / L p-phenylenediamine solution dropwise to 0.1 mol / L HCl solution at a volume ratio of 1:1 to obtain an acidic p-phenylenediamine solution. At 0°C, add 0.01 mol / L sodium nitrite solution dropwise to the acidic p-phenylenediamine solution at a molar mass ratio of 1:1 for reaction to obtain a dark red diazonium salt solution. At room temperature, the carbon tube membrane was placed in a diazonium salt solution and reacted for 12 hours. The sample was taken out and washed repeatedly with deionized water, ethanol and acetone to obtain a modified carbon tube membrane.

[0024] (2) Using the modified carbon tube film as the substrate, the polyurethane and the carbon tube film are composited, and annealed at a stepwise temperature rise within the range of 50-400° C. to obtain a polyurethane / carbon tube composite thin film material.

Embodiment 2

[0026](1) Carbon tube membrane modification: Add 0.5 mol / L p-phenylenediamine solution dropwise to 0.1 mol / L HCl solution at a volume ratio of 1:1 to obtain an acidic p-phenylenediamine solution. At 0°C, add 0.5 mol / L sodium nitrite solution dropwise to the acidic p-phenylenediamine solution at a molar mass ratio of 1:1 for reaction to obtain a dark red diazonium salt solution. At room temperature, the carbon tube membrane was placed in a diazonium salt solution and reacted for 20 h. The sample was taken out and washed repeatedly with deionized water, ethanol and acetone to obtain a modified carbon tube membrane.

[0027] (2) Using the modified carbon tube film as the substrate, compounding the polyimide acid and the carbon tube film, and annealing in the range of 50-400° C. to obtain the polyimide / carbon tube composite thin film material.

[0028] figure 1 SEM images of carbon tube film and polyimide / carbon tube composite film. From figure 1 (A) It can be seen that the ca...

Embodiment 3

[0032] (1) Carbon tube membrane modification: Add 0.01 mol / L p-phenylenediamine solution dropwise to 0.1 mol / L HCl solution at a volume ratio of 1:1 to obtain an acidic p-phenylenediamine solution. At 0°C, add 0.01 mol / L sodium nitrite solution dropwise to the acidic p-phenylenediamine solution at a molar mass ratio of 1:1 for reaction to obtain a dark red diazonium salt solution. At room temperature, the carbon tube membrane was placed in a diazonium salt solution and reacted for 12 hours. The sample was taken out and washed repeatedly with deionized water, ethanol and acetone to obtain a modified carbon tube membrane.

[0033] (2) Using the modified carbon tube film as a substrate, compounding polystyrene and carbon tube film, and annealing at a stepwise temperature rise within the range of 50-400° C., to obtain a polystyrene / carbon tube composite thin film material.

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Abstract

The invention discloses an anisotropic material of polyimide. Carbon nanotube membrane recombination is conducted after polyimide acid is spin-coated on modified carbon nanotube membrane, annealing is conducted in the temperature range of 50-400 DEG C. The anisotropic material of polyimide is simple in process, short in cycle, fast and efficient, easy to use, and low in cost, the injection of oriented carbon nanotube membrane is significant in the improvement of the mechanical properties of the composite thin membrane materials, and is apparent in the presentation of anisotropy in in-plane horizontal and vertical directions, and the mechanical performance in the horizontal direction is more notably increased.

Description

[0001] The application of the present invention is a divisional application of the parent application "Preparation method of anisotropic polymer / carbon tube composite film material". The application number of the parent application is 201510195613X, and the application date is April 23, 2015. technical field [0002] The invention relates to a preparation method of an anisotropic polymer / carbon tube composite thin film material, which has important application prospects in the fields of aerospace, electronic information, automobile industry and the like. The invention belongs to the field of preparation of composite materials. Background technique [0003] In recent years, polymer composite materials have been widely used in energy, information, electronics, molecular devices, etc., and polymer composite materials with anisotropy provide a greater potential space for the application of composite materials. The orientation of the material can fully exert the potential of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/08C08K9/04C08K7/24C08J5/18
CPCC08J5/18C08J2325/06C08J2327/18C08J2375/04C08J2379/08C08K7/24C08K9/04C08L2203/16C08L79/08C08L25/06C08L27/18C08L75/04
Inventor 封伟李双雯冯奕钰
Owner TIANJIN UNIV
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