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Chemical nickel-cobalt-lanthanum ternary alloy plating solution for carbon nano tube, and chemical plating method

A carbon nanotube and ternary alloy technology, which is applied in the fields of carbon nanotube electroless nickel-cobalt-lanthanum ternary alloy plating solution and its preparation and electroless plating, can solve the problem of not very strong wave absorbing performance, and achieve accelerated Restoration effect

Inactive Publication Date: 2013-01-16
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the absorbing performance of a single carbon nanotube as an absorber is not very strong. Based on the improvement of the absorbing performance of the material, through the compounding of the material, a stronger absorbing characteristic has been explored.

Method used

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  • Chemical nickel-cobalt-lanthanum ternary alloy plating solution for carbon nano tube, and chemical plating method
  • Chemical nickel-cobalt-lanthanum ternary alloy plating solution for carbon nano tube, and chemical plating method
  • Chemical nickel-cobalt-lanthanum ternary alloy plating solution for carbon nano tube, and chemical plating method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The first step: selection of base material

[0027] The matrix material is a multi-walled carbon nanotube: the multi-walled carbon nanotube has a diameter of 50-80 nm and a length of 1-2 μm.

[0028] The second step: the pretreatment of the substrate

[0029] (a) Mixed acid oxidation treatment of carbon nanotubes

[0030] Weigh 2.0g of MWNTs and dissolve in 160ml of mixed acid (the volume ratio of concentrated nitric acid to concentrated sulfuric acid is 1:3), heat and reflux at 70°C for 12h, after cooling, dilute three times, filter, and wash the filter cake with distilled water until neutral. It was then baked at 80°C to constant weight.

[0031] (b) Sensitization, activation

[0032] Add 100ml of sensitizing solution to 1g of carbon nanotubes, ultrasonically disperse at 45°C for 1h, filter, wash with distilled water until neutral; then add carbon nanotubes to 100ml of activation solution, ultrasonically disperse at 45°C for 1h, filter, and wash with distilled wate...

Embodiment 2

[0045] The first step: selection of base material

[0046]The matrix material is a multi-walled carbon nanotube: the multi-walled carbon nanotube has a diameter of 50-80 nm and a length of 1-2 μm.

[0047] The second step: the pretreatment of the substrate

[0048] (a) Mixed acid oxidation treatment of carbon nanotubes

[0049] Weigh 2.0g of MWNTs and dissolve in 160ml of mixed acid (the volume ratio of concentrated nitric acid to concentrated sulfuric acid is 1:3), heat and reflux at 70°C for 12h, after cooling, dilute three times, filter, and wash the filter cake with distilled water until neutral. It was then baked at 80°C to constant weight.

[0050] (b) Sensitization, activation

[0051] Add 100ml of sensitizing solution to 1g of carbon nanotubes, ultrasonically disperse at 45°C for 1h, filter, wash with distilled water until neutral; then add carbon nanotubes to 100ml of activation solution, ultrasonically disperse at 45°C for 1h, filter, and wash with distilled water...

Embodiment 3

[0064] The first step: selection of base material

[0065] The matrix material is a multi-walled carbon nanotube: the multi-walled carbon nanotube has a diameter of 50-80 nm and a length of 1-2 μm.

[0066] The second step: the pretreatment of the substrate

[0067] (a) Mixed acid oxidation treatment of carbon nanotubes

[0068] Weigh 2.0g of MWNTs and dissolve in 160ml of mixed acid (the volume ratio of concentrated nitric acid to concentrated sulfuric acid is 1:3), heat and reflux at 70°C for 12h, after cooling, dilute three times, filter, and wash the filter cake with distilled water until neutral. It was then baked at 80°C to constant weight.

[0069] (b) Sensitization, activation

[0070] Add 100ml of sensitizing solution to 1g of carbon nanotubes, ultrasonically disperse at 45°C for 1h, filter, wash with distilled water until neutral; then add carbon nanotubes to 100ml of activation solution, ultrasonically disperse at 45°C for 1h, filter, and wash with distilled wate...

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Abstract

The invention relates to a wave-absorbing material and a preparation method thereof, in particular to a chemical nickel-cobalt-lanthanum ternary alloy plating solution for a carbon nano tube, and a preparation method and a chemical plating method thereof. According to the method, a hydrochloric acid solution of lanthanum oxide is added into a chemical plating solution for the carbon nano tube, and the electrode potentials of rare-earth elements La move positively by adjusting the concentration of all components in the plating solution, so that deposition potentials of the rare-earth elements L are close to those of metal Ni and Co; and therefore, alloy co-deposition is realized. One part of the rare-earth elements L in the chemical plating solution exist in the form of positive ions to exert the function of a reducing agent, so that the reduction of metal ions in an alloy plating layer is accelerated, and the phosphorus content in the plating layer is reduced. The chemical plating method has the advantages that according to a chemical nickel-cobalt-lanthanum ternary alloy plating material prepared by the chemical plating method, the lanthanum atom content in the alloy plating layer can reach 4.16 percent.

Description

technical field [0001] The invention relates to a wave-absorbing material and a preparation method thereof, in particular to a carbon nanotube electroless nickel-cobalt-lanthanum ternary alloy plating solution and its preparation and electroless plating method. Background technique [0002] Carbon nanotubes (CNTs) are tubular objects composed of graphite-like hexagonal grids. The tubes are generally composed of single-layer or multi-layer tubes, with a diameter of several nanometers to tens of nanometers and a length of several tens of nanometers. Micron, its lamellar spacing is 0.34nm, which is slightly larger than that of graphite (0.3354nm). The special structure and dielectric properties of carbon nanotubes make them exhibit strong broadband microwave absorption properties, and at the same time have a series of advantages such as light weight, adjustable conductivity, strong high-temperature oxidation resistance and good stability. A promising microwave absorber, which ...

Claims

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Application Information

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IPC IPC(8): C23C18/48C23C18/50
Inventor 黄英姚文惠王娜丁晓何倩王秋芬
Owner NORTHWESTERN POLYTECHNICAL UNIV
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