A kind of helical nano carbon fiber and preparation method thereof

A nano-carbon fiber and helical technology, which is applied in the field of helical nano-carbon fiber and its preparation, can solve the problems of inability to realize mass production, complex preparation process, low yield, etc., and achieve controllable process preparation, increase growth, and high specific surface area Effect

CN108624992BActive Publication Date: 2020-10-09SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2020-10-09

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Abstract

The invention discloses spiral nanocarbon fiber and a preparation method thereof, and belongs to the technical field of carbon fiber preparation. Modified carbon black is added into a plating solutionfor preparing a nickel-phosphorus plating layer, and carbon black particles oxidatively modified by concentrated nitric acid help to form more uniform nanopores in the nickel-phosphorus plating layerin the etching stage, so that the catalytic activity is improved, and further a beneficial growth environment is provided for subsequent growth of the spiral nanocarbon fiber to achieve macro growthof the spiral nanocarbon fiber. The nickel-phosphorus plating layer is etched by an anodizing etching method, the controllability is stronger, and technological parameters such as the electrolyte concentration, the voltage or current and the time can be strictly controlled, so that the problem that the reaction rate is not easy to control due to chemical etching in the prior art is effectively avoided and controllable technological preparation of a nanoporous nickel-phosphorus material is achieved. The spiral nanocarbon fiber prepared by the preparation method provided by the invention is goodin shape, high in yield, simple in technology and high in repeatability.
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Description

technical field

[0001] The invention relates to the technical field of carbon fiber preparation, in particular to a helical nano carbon fiber and a preparation method thereof. Background technique

[0002] Helical carbon nanofiber is a material with excellent performance. Its special helical shape makes it have excellent physical and chemical properties such as high specific surface area, high specific modulus, high electrical conductivity, low density and high elasticity. It is expected to be used in many The field has new potential applications, such as high-performance electromagnetic wave absorbing devices, high specific capacity batteries, tactile sensors, nano-electromechanical devices, and hydrogen storage devices.

[0003] At present, most of the methods for preparing helical nano-carbon fibers at home and abroad are mainly based on chemical vapor deposition (CVD), using graphite or ceramics as a substrate, and then spreading catalyst particles on the substrate, and ...

Examples

Embodiment 1

[0041] The preparation method of the helical carbon nanofiber of the present embodiment comprises:

[0042] 1. Preparation of nanoporous nickel phosphorus materials:

[0043] (11) Preparation of plating solution:

[0044] (1.1) Preparation of modified carbon black: place carbon black in concentrated nitric acid and heat in an oil bath at 80° C., condense and reflux, and stir for 20 hours to prepare modified carbon black. Cool to room temperature, centrifuge and wash to neutral, then dry for use.

[0045] (1.2) Prepare the first solution: mix lactic acid, nickel sulfate and citric acid to prepare the first solution. Specifically, take lactic acid in a beaker, add 100ml of distilled water and mix thoroughly, then weigh nickel sulfate into the beaker, add citric acid while stirring continuously with a glass rod, until the nickel sulfate is completely dissolved to form a uniform transparent solution, and the first solution is prepared.

[0046] (1.3) Prepare the second solution...

Embodiment 2

[0058] The preparation method of the helical carbon nanofiber of the present embodiment comprises:

[0059] 1. Preparation of nanoporous nickel phosphorus materials:

[0060] (11) Preparation of plating solution:

[0061] (1.1) Preparation of modified carbon black: place carbon black in concentrated nitric acid and heat in an oil bath at 100° C., condense and reflux, and stir for 15 hours to prepare modified carbon black. Cool to room temperature, centrifuge and wash to neutral, then dry for use.

[0062] (1.2) Prepare the first solution: mix lactic acid, nickel sulfate and citric acid to prepare the first solution. Specifically, take lactic acid in a beaker, add 100ml of distilled water and mix thoroughly, then weigh nickel sulfate into the beaker, add citric acid while stirring continuously with a glass rod, until the nickel sulfate is completely dissolved to form a uniform transparent solution, and the first solution is prepared.

[0063] (1.3) Prepare the second solutio...

Embodiment 3

[0075] The preparation method of the helical carbon nanofiber of the present embodiment comprises:

[0076] 1. Preparation of nanoporous nickel phosphorus materials:

[0077] (11) Preparation of plating solution:

[0078] (1.1) Preparation of modified carbon black: carbon black was placed in concentrated nitric acid and heated in an oil bath at 90° C., condensed and refluxed, stirred and reacted for 18 hours to prepare modified carbon black. Cool to room temperature, centrifuge and wash to neutral, then dry for use.

[0079] (1.2) Prepare the first solution: mix lactic acid, nickel sulfate and citric acid to prepare the first solution. Specifically, take lactic acid in a beaker, add 100ml of distilled water and mix thoroughly, then weigh nickel sulfate into the beaker, add citric acid while stirring continuously with a glass rod, until the nickel sulfate is completely dissolved to form a uniform transparent solution, and the first solution is prepared.

[0080] (1.3) Prepar...