Flexible conductive carbon nanofiber membrane as well as preparation method and application thereof

Abstract

The invention discloses a flexible conductive carbon nanofiber membrane as well as a preparation method and application thereof. The preparation method of the flexible conductive carbon nanofiber membrane comprises the following steps of dissolving a pore forming agent and a polymer carbon source in a pre-selected solvent to obtain a precursor solution; based on the precursor solution, preparing a precursor fiber membrane by using an electrostatic spinning technology; and carrying out pre-oxidation and carbonization treatment on the precursor fiber membrane to prepare the flexible conductive carbon nanofiber membrane, wherein the pore-forming agent is one or more of urea, ammonium bicarbonate and thiourea. According to the method, the carbon fiber membrane with continuous fibers can be prepared (for example, the diameter can be controlled to be 200-500 nanometers, and the length is 50-80 centimeters); and the prepared carbon fiber membrane has good flexibility (exemplarily, bending and rubbing at any angle can be realized).

Description

technical field [0001] The invention belongs to the technical field of novel carbon materials and their preparation, and in particular relates to a flexible conductive carbon nanofiber film and its preparation method and application. Background technique [0002] The rapid development of social science and technology is often accompanied by a sharp demand for energy, which leads to the massive exploitation and utilization of fossil energy, which leads to a rapid increase in the level of greenhouse gases such as carbon dioxide in the atmosphere, and then causes incalculable losses and damage to the natural environment. . Therefore, it is very necessary to develop clean energy, which can alleviate the environmental pollution caused by the exploitation of fossil energy. [0003] In recent years, clean energy such as solar energy, wind energy, and tidal energy has been greatly developed. However, due to the intermittent and uncontrollable nature of these clean energy sources, t...

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Problems solved by technology

At present, commercial carbon paper is mainly prepared by wet papermaking, that is, the carbon fiber slurry of suitable length is evenly dispersed, and the carbon fibers are bonded by chemical adhesives, followed by water filtration, drying, pressing, and final molding; this existing method There are still the following defects: (1) There is a high requirement for the size of carbon fiber, the general length is 4-6 mm, and the diameter is 8-12 microns; (2) The preparation process is complicated, and it is necessary to mix carbon fiber paper with carbonaceous materials such as pitch and other materials. Mixing to achieve bonding between fibers to improve strength, but the wetting process of the binder and carbon fiber paper in this process is complicated, and only a few countries can currently master this process; (3) the current commercial carbon paper bend The bending performance is poor, and any bending of 90 to 180 degrees cannot be realized

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