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Method for efficient Al-C covalent bond formation between aluminum and carbon material

A technology of carbon materials and covalent bonds, which is applied in the field of forming Al-C covalent bonds, can solve the problems of difficult dispersion of aluminum matrix, inability to control the bonding force of aluminum and carbon materials and the decrease of yield, and achieve light weight, mechanical The effect of excellent strength

Inactive Publication Date: 2009-07-08
RES & BUSINESS FOUND SUNGKYUNKWAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this method, there are disadvantages in that the bonding force between aluminum and carbon materials cannot be controlled and the yield decreases
[0008] The formation of this aluminum / carbon material composite is accompanied by several problems which are basically caused by the difference in physical and chemical properties between these two substances
First, carbon materials, such as carbon nanotubes, have high mutual cohesion due to van der Waals forces, so it is difficult to disperse uniformly in the aluminum matrix

Method used

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  • Method for efficient Al-C covalent bond formation between aluminum and carbon material
  • Method for efficient Al-C covalent bond formation between aluminum and carbon material
  • Method for efficient Al-C covalent bond formation between aluminum and carbon material

Examples

Experimental program
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Effect test

Embodiment 1

[0057] Example 1: Method of inducing Al-C covalent bond between aluminum and carbon material by using electric arc

[0058] The detailed content of the present invention follows figure 1 in the experimental process. During a series of the experiments, multi-walled carbon nanotubes (ILJIN Nanotech, CM95), NK carbon nanotubes (Nano-Karbon, hellow CNT 75) and carbon fibers (Toray-Japan, T 300) were used as carbon materials. In this regard, multi-walled carbon nanotubes have a diameter of 10 nm to 20 nm and a length of 10 μm to 20 μm, and NK carbon nanotubes have a diameter of 40 nm to 60 nm and a length of about 20 μm.

[0059] 1-1-1. Acid treatment to induce functionalization of carbon materials

[0060] With 70% nitric acid (HNO 3 ) in a water tank-type reactor for 10 minutes to 3 hours of ultrasonic reaction to functionalize the carbon nanotubes. NK carbon nanotubes were purchased as functionalized products. In sulfuric acid (H 2 SO 4 ) and nitric acid (HNO 3 ) in a 1:...

Embodiment 2

[0068] Example 2: Observation of samples after induction of Al-C covalent bonds between aluminum and carbon materials by using an electric arc

[0069] figure 2 Photographs of the samples taken by a digital camera (koolpix-3700, Nikon) before and after using an electric arc to induce Al-C covalent bonds between aluminum and the respective carbon materials are depicted.

[0070] figure 2 (a) is a photo taken before multi-walled carbon nanotubes (MWCNTs) were not mixed with aluminum, figure 2 (b) is to figure 2 (a) Photograph taken after MWCNTs mixed with Al samples and then induced to bond to each other by using an electric arc. Looking at these photographs, it turns out that the MWCNTs are not visible on the outside, so it can be noticed that the MWCNTs do not fall out of the aluminum matrix. The measured apparent density is 2.63g / cm 3 , which is lower than the apparent density of ordinary aluminum, so it can be expected that MWCNTs are contained in the aluminum matri...

Embodiment 3

[0073] Example 3: Electron Microscopy Analysis of Sample Surfaces After Inducing Al-C Covalent Bonds Between Aluminum and Carbon Materials by Using an Electric Arc

[0074] image 3 Photographic analysis data of sample surfaces determined by electron microscopy (JSM7000F, JEOL) after induction of Al-C covalent bonds between aluminum and carbon materials using electric arcs are described.

[0075] image 3 (a) is an electron micrograph of the sample surface after the Al-C covalent bond between Al and MWCNTs was induced, while image 3 (b) is an electron micrograph of multi-walled carbon nanotubes before the experiment. Comparing these two photographs considering their same magnification, it can be noticed that the multi-walled carbon nanotubes are not exposed.

[0076] image 3 (c) and 3(d) are electron micrographs taken before and after the Al-C covalent bond between Al and NK carbon nanotubes was induced. As in the multi-walled carbon nanotube experiment, comparing these...

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Abstract

The present invention discloses an effective method of forming an Al-C covalent bond between aluminum and a carbon material. Particularly, provides a method of forming an Al-C covalent bond between aluminum and a carbon material by applying an electric arc to a mixture of the aluminum and the carbon material under vacuum, heated and pressurized conditions. The invention also provides a method of producing aluminum-carbon material compound and aluminum-carbon material compound obtained thereof, wherein Al-C covalent bond is formed by applying an electric arc between aluminum and a carbon material. The invention also provides a method of forming an Al-C covalent bond between aluminum and a carbon material by applying electrochemical techniques, a method of producing aluminum-carbon material compound and aluminum-carbon material compound obtained thereof, wherein covalent bond is formed between carbon material and aluminum by plating surface of carbon material with aluminum by exerting chi-potential to electrochemistry equipment.

Description

technical field [0001] The present invention relates to methods of forming Al-C covalent bonds using arc or electrochemical techniques. Background technique [0002] Aluminum is used in a wide range of applications, from everyday items such as kitchen foil and disposable tableware to durable products such as windows, vehicles and aircraft. Aluminum is characterized by its light weight, which is only one-third of the weight of steel, and its excellent strength by forming an alloy with other metals. Also, aluminum is chemically stable due to the presence of a chemically stable oxide layer on its surface that prevents it from being corroded by moisture or oxygen. [0003] In view of this, aluminum has been widely used in vehicles, aircraft, and the like. In particular, the aluminum wheels used in the vehicle are lighter than conventional steel wheels, thereby reducing their own load, which will help improve fuel efficiency while reducing the weight of the vehicle body. Howev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/30
CPCC25D5/54C22C47/02C22C32/0084C22C49/06C25D3/44C22C26/00C22C2026/002Y10T428/2918Y10T428/2982B22F1/00
Inventor 苏康杓李永熙安启革
Owner RES & BUSINESS FOUND SUNGKYUNKWAN UNIV