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Method of preparing thin sheet net-like metallic short fiberous material

A short carbon fiber and metallization technology, which is applied in jewelry and other fields, can solve the problems of difficult process, high cost of chemical plating process, and high conductivity of metal coating, and achieve the effect of strong electric field shielding, simple process, and enhanced conductivity.

Inactive Publication Date: 2009-05-06
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Metallized carbon fiber is superior to bare carbon fiber in terms of electrical conductivity and thermal conductivity, and can still maintain good mechanical properties, but it is currently difficult to obtain the required two-dimensional metallized carbon fiber material with a simple preparation process
[0003] The metallization process for two-dimensional planar carbon fiber materials is generally electroplating, chemical plating, etc., but they have their own disadvantages: traditional electroplating process, it is difficult to obtain carbon fibers with a uniform coating, and phenomena such as "black hearts" often occur, and the thickness of the coating is not easy. Control; the cost of the electroless plating process is high, the process is difficult to control, and the conductivity of the metal coating obtained by electroless plating is not as high as that of electroplating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Reticular carbon fiber material with a coating composition of nickel, a coating thickness of 2 microns, and a sheet thickness of 50 microns

[0018] Refer to the common nickel plating solution formula, such as sulfamate plating solution: nickel sulfamate 400g / L, nickel chloride 5g / L, boric acid 40g / L, put it in the electroplating tank after preparation, and heat it in a water bath to 50 ℃ or so. Take 0.05g / L short carbon fiber with a length of 5cm, pour it into the electroplating tank and stir evenly. Add 0.1g / L polyethylene glycol as a foaming agent, and add 5g / L oleic acid as a trapping agent. A pure nickel plate is used as the anode, and a copper plate is used as the cathode. The pH of the plating solution was adjusted at about 4.0. Compressed air is used to stir, and after the air is introduced, the short carbon fibers float to the liquid surface to form a flat mesh prefabricated part. Put the cathode into one end close to the preform, and the anode on the other...

Embodiment 2

[0020] Reticular carbon fiber material with a coating composition of nickel, a coating thickness of 10 microns, and a sheet thickness of 500 microns

[0021] The formula of the plating solution is: nickel sulfamate 400g / L, nickel chloride 5g / L, boric acid 40g / L, after preparation, put it in the electroplating tank and heat it in a water bath to about 50°C. Take 0.5g / L short carbon fiber with a length of about 1cm, pour it into the electroplating tank and stir evenly, add 1.0g / L pine oil as a foaming agent and 2.5g / L sodium octadecyl sulfamate as a collector . A pure nickel plate is used as the anode, and a copper plate is used as the cathode. The pH of the plating solution was adjusted at about 4.0. Compressed air is used to stir, and after the air is introduced, the short carbon fibers float to the liquid surface to form a flat mesh prefabricated part. Put the cathode on one end close to the preform and the anode on the other end and away from the preform. The current den...

Embodiment 3

[0023] Reticular carbon fiber material with a coating composition of copper, a coating thickness of 2 microns, and a sheet thickness of 50 microns

[0024] Prepare the plating solution according to the common electroplating copper formula, wherein copper sulfate 200g / L, sulfuric acid 70g / L. Electroplating was performed at room temperature (25°C). Take 1.0g / L short carbon fiber with a length of about 5.0mm, pour it into the electroplating tank and stir evenly, add 1.0g / L tripropylene glycol as foaming agent and 1.5g / L methyl phenyl phosphate as collector. The phosphor copper plate is used as the anode, and the red copper plate is used as the cathode. Compressed air is used to stir, and after the air is introduced, the short carbon fibers float to the liquid surface to form a flat mesh prefabricated part. Put the cathode on one end close to the preform and the anode on the other end and away from the preform. The current density is 2.5A / dm 2 , and the time is 30 minutes. At ...

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Abstract

This invention relates to a method for manufacturing a thin-layer network of metallized short carbon fibers, which comprises the steps of: (1) adding an appropriate amount of short carbon fibers into the plating solution of a conventional metal or alloy and uniformly dispersing; (2) performing foam floatation method so that the short carbon fibers are floated on the surface of the plating solution and interconnected to form a network precursor of short carbon fibers; and (3) contacting one side of the precursor with a cathode for electroplating, and controlling the current density and plating time so that a metal layer is uniformly deposited on the precursor to obtain a thin-layer network of metallized short carbon fibers. The method has such advantages of simple process and low cost, and can effectively control the thickness of the plating layer, the thickness of the thin-layer network of metallized short carbon fibers and the metal composition. The thin-layer network of metallized short carbon fibers can be used as electromagnetic shielding materials, antistatic materials, and wave-absorbing materials, metal-based and resin-based composite materials.

Description

technical field [0001] The invention relates to a preparation method of a short carbon fiber material, in particular to a preparation method of a flake mesh metallized short carbon fiber material, which can be used in the preparation of electromagnetic shielding materials, antistatic materials, wave-absorbing materials, structural materials and the like. The invention belongs to the technical field of material surface treatment. Background technique [0002] Carbon fiber has a series of advantages such as high specific strength, high specific modulus, high temperature resistance, corrosion resistance, electrical conductivity, thermal conductivity and low expansion coefficient, and is an important reinforcement of composite materials. In recent years, the application of carbon fiber in functional materials has become increasingly widespread, especially the two-dimensional planar or sheet-like materials of carbon fiber, such as carbon fiber felt, carbon fiber paper, and carbon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D7/00C25D5/54
Inventor 胡文彬唐谊平刘磊沈彬仵亚婷
Owner SHANGHAI JIAOTONG UNIV