Carbon nano tube compounded polyimide film and preparation method thereof

Abstract

The invention discloses a carbon nano tube compounded polyimide film, which is prepared from the following components in parts by weight: 150 to 250 parts of polyimide resin polymer, 1 to 2 parts of fullerene, 0.1 to 0.2 part of rare earth oxide and 2.5 to 3.5 parts of modifier. The polyimide resin polymer is prepared from the following components with contents in percentage by weight: 0.5 to 3 percent of carbon nano tube, 1 to 3 percent of titanium pigment, 0.5 to 3 percent of nitride micro mist, 0.1 to 2 percent of modified kaolin, 0.1 to 2 percent of copper fluosilicate and the balance of polyimide resin. The carbon nano tube compounded polyimide film provided by the invention is excellent in mechanical performance and has the elongation at break, which is more than 40 percent; the thickness of the film is only 8 to 12 microns; the normal-temperature tensile strength is more than 180 MPa; the coefficient of linear thermal expansion is 20ppm/DEG C to 36ppm/DEG C and further, the carbon nano tube compounded polyimide film does not wrinkle and is high in flatness.

Description

technical field [0001] The invention relates to a polyimide film, in particular to a carbon nanotube composite polyimide film and a preparation method thereof. Background technique [0002] At present, the vigorous development of the aerospace industry has an increasingly urgent demand for polymer materials, but due to the impact of the space environment, there are strict requirements for the performance of polymer materials in all aspects. As a material with high heat resistance, polyimide also has high chemical stability, high mechanical properties, high radiation resistance and high processability, and has great application space in the aerospace industry. However, polyimide has a high resistivity, electrons are not easy to move in the material, and the accumulated charge is difficult to diffuse, which will form static electricity, and static electricity is extremely dangerous in the aerospace field, and it is easy to damage aviation equipment and damage electronic compon...

AI Technical Summary

Problems solved by technology

Therefore, compounding carbon nanotubes and polyimide is a very promising research direction. At present, carbon nanotubes have been widely used in the research of composite doping of polymer materials, and good results have been achieved, but there are still cumbersome preparations, The overall performance is not ideal, so further research and improvement are needed to obtain low-cost, high-quality polymer materials

[0004] At present, there have been a large number of reports on special polyimide composite film materials, but there are still problems such as cumbersome preparation, large pollution, low flatness of the final composite material, and unsatisfactory performance.