Preparation method of multi-branched carbon fiber

Abstract

The invention belongs to the technical field of chemical material preparation and relates to a method for preparing multi-branched carbon fibers. First, at room temperature, deionized water is used as a solvent to prepare an aqueous solution of metal copper salt as a catalyst precursor; and then the metal copper salt solution is taken The catalyst precursor is placed in a porcelain boat and put into the reaction tube in the tubular reactor. The reaction tube is evacuated and then the temperature begins to rise. The carbon source gas acetylene is introduced at the set temperature to atmospheric pressure for reaction; when After the reaction is completed, remove the remaining gas in the reaction tube and maintain a vacuum. Turn off the heating power. After natural cooling to room temperature, introduce air to atmospheric pressure. Open the lid of the reaction tube port and collect the product in the porcelain boat. Dendritic carbon fiber; its reaction process is simplified, the operation is simple, and the experimental repeatability is good.

Description

Technical field: [0001] The invention belongs to the technical field of chemical material preparation and relates to a preparation method of multi-branch carbon fibers. Background technique: [0002] Due to their unique characteristics in physics, chemistry, mechanics, electricity, and magnetism, carbon materials such as carbon fibers have broad application prospects in many aspects such as catalyst carriers, capacitor electrodes, structural reinforcement materials, and wave-absorbing materials. In recent years, the research on materials such as carbon nanotubes and vapor-phase grown carbon fibers has received huge energy and funding investment worldwide. As we all know, the particularity of the material structure determines its unique performance. The multi-branched carbon fiber with a more complex structure is different from a simple one-dimensional carbon material. It can be used in many aspects in the future, especially in nanoscale integrated circuits and structures. R...

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Problems solved by technology

In the process of preparing multi-branched carbon fibers by chemical vapor deposition, the choice of catalyst type is a key factor, which can directly affect the temperature of carbon fiber synthesis reaction, the growth rate of carbon fibers, etc. For traditional iron, cobalt, nickel, etc. For transition metal catalysts, the required reaction temperature is generally higher than 600°C; the high reaction temperature in the chemical vapor deposition method means high energy consumption, which is in line with the current social main body advocating energy saving, emission reduction and green environmental protection Inconsistent; secondly, in the general process of preparing multi-branched carbon fibers, the position of branched growth of the multi-branched carbon fibers, that is, the position of the branch node is random, it cannot be precisely controlled, and each branch The proportional relationship between the lengths of carbon fibers has not been well resolved, and there is also a lot of arbitrariness; finally, the growth quantity of carbon fibers at the branch growth nodes is uncertain, that is, at different branch growth node positions, it is possible to grow There are different amounts of carbon fibers; the above three points are common technical problems in the current research and preparation of multi-branched carbon fiber controllable growth process

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