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Preparation method of multi-wall nanometer carbon tube conductive material for switch contact device

A multi-wall carbon nanotube and carbon nanotube technology, applied in electrical switches, carbon-silicon compound conductors, metal material coating processes, etc., can solve the problems of easy aging, easy softening of silver, increased resistance, etc., and achieve safety. The effect of high, high melting point and simple manufacturing process

Active Publication Date: 2005-11-23
SHANGHAI UNIV
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Problems solved by technology

But at high temperature, silver is easy to soften and cause deformation, and at the same time, silver will be oxidized, resulting in an increase in resistance
In the Chinese patent CN1538798, water-resistant conductive adhesive is used, and exposed wiring or connecting terminals are arranged on the base material manufactured by dehydration condensation. It is formed by adding conductive particles to the molecular resin, so it is prone to aging and is not resistant to friction

Method used

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Examples

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Effect test

Embodiment 1

[0012] The specific process steps of the present embodiment are as follows:

[0013] 1. First, modify the multi-wall carbon nanotubes, that is, place 1 gram of carbon nanotubes in 10ml of concentrated mixed acid solution, and the concentrated mixed acid is HNO 3 with H 2 SO 4 The acid solution formulated with a weight ratio of 1:3 was heated to 150°C, heated and refluxed at this temperature for 2 hours, then washed with distilled water and oil filter until neutral, dried, and ball milled at high speed in a ball mill for 3 hours. The speed of the ball mill was 1200 rpm to obtain modified carbon nanotubes.

[0014] 2. The above-mentioned modified carbon nanotubes are subjected to silver-doped modification treatment, that is, the modified carbon nanotubes are soaked in SnCl with a concentration of 5%. 2 solution, to sensitize carbon nanotubes; filter and wash with distilled water until neutral, and dry to obtain sensitized carbon nanotubes; then place the sensitized carbon nan...

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Abstract

The invention relates to the preparation method of multi-wall nanometer carbon tube conductive material for switch contact device which comprises the steps of, (1) subjecting the multiple wall carbon nano tube to modification treatment, mixing nitric acid and sulfuric acid by the weight ratio of 1:3, heating the prepared acid solution to 150 deg. C, backflowing and distilled water is used for scouring to neutrality, drying, high speed ball grinding 3 hours, obtaining modified nano carbon tube, (21) subjecting the modified carbon nano tube to silver-doping modification treatment, immersing into SnCl2 solution, loading into AgNO3 solution for ultrasonic oscillation, charging in ammonia and formaldehyde, finally pumping and washing to neutrality with distilled water, drying so as to obtain silver-doped modified nano carbon tube, (3) charging pnenolic aldehyde organic adhesive, thermally pressing into solid blocks, charring at 850 deg. C in retorts.

Description

technical field [0001] The invention relates to a method for preparing a conductive material of a switch contact device of a multi-walled carbon nanotube, and belongs to the technical field of electrical switch contact devices and material manufacturing technology. Background technique [0002] At present, the traditional manufacturing method of switch contact device materials is based on metallic copper. In order to increase its electrical conductivity, a layer of metallic silver is generally coated on copper. Such as Chinese patents CN2348480 and CN85108391 all belong to this type of method. But at high temperature, silver is easy to soften and cause deformation, and at the same time, silver will be oxidized, resulting in an increase in resistance. In the Chinese patent CN1538798, water-resistant conductive adhesive is used, and exposed wiring or connecting terminals are arranged on the base material manufactured by dehydration condensation. Molecular resin is formed by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/52
Inventor 施利毅代凯张云竹
Owner SHANGHAI UNIV
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