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A preparation method of cnt-go/cu composite material with hierarchical structure

A technology of CNT-GO and composite materials, applied in the field of preparation of CNT-GO/Cu composite materials, can solve the problems of affecting the performance of composite material reinforcements, harmful mechanical properties of reinforcements, deliberately manufacturing reinforcements, etc., and achieve good electrical conductivity. , Short operating time, the effect of improving tensile strength and fracture toughness

Active Publication Date: 2020-12-15
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under the action of strong interlayer van der Waals force, GO is easy to accumulate, which greatly reduces its surface area, which affects its performance as a composite material reinforcement.
[0003] Obtaining uniform distribution of reinforcements has always been a key problem in the field of composite materials, which can effectively improve the comprehensive mechanical properties of composite materials; it is generally believed that, compared with the uniform distribution of reinforcements, the agglomeration of reinforcements It is detrimental to the mechanical properties, therefore, researchers have been trying to eliminate this inhomogeneity without intentionally creating agglomeration of reinforcements from the perspective of microstructure design

Method used

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  • A preparation method of cnt-go/cu composite material with hierarchical structure
  • A preparation method of cnt-go/cu composite material with hierarchical structure
  • A preparation method of cnt-go/cu composite material with hierarchical structure

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Acidification treatment of CNTs: Add CNTs to a mixed solution of concentrated sulfuric acid / concentrated nitric acid (volume ratio 3:1) and heat in a water bath at 70 °C for 4 hours, then filter and dry to obtain acidified CNTs powder.

[0035] (2) Preparation of composite precursor: Add 0.032g of CNT-GO (volume ratio of 6:1, 0.027g of CNTs, 0.005g of GO) into 900ml of deionized water, and use a high-shear emulsifier (6000rpm / min) Stir for 20min, then sonicate for 1.5h; then add 17.37g of copper acetate to the CNT-GO solution (in the CNT-GO / Cu composite, the volume fraction of the CNT-GO hybrid reinforcement is 2.5%) , and stirred with a high-shear emulsifier for 10 min; then, at the same speed, sodium hydroxide solution was added dropwise until the pH reached 14; CNT-GO / CuO powder was obtained after filtration and drying.

[0036] (3) Preparation of composite powder: After argon hydrogen (H 2 The composite precursor prepared in step (2) was reduced in a tube furn...

Embodiment 2

[0041] (1) Acidification treatment of CNTs: Add CNTs to a mixed solution of concentrated sulfuric acid / concentrated nitric acid (volume ratio 3:1) and heat in a water bath at 70 °C for 4 hours, then filter and dry to obtain acidified CNTs powder.

[0042] (2) Preparation of composite precursor: Add 0.019g of CNT-GO (volume ratio of 6:1, 0.016g of CNTs, 0.003g of GO) into 900ml of deionized water, and use a high-shear emulsifier (6000rpm / min) Stir for 20min, then sonicate for 1.5h; then add 17.37g of copper acetate to the CNT-GO solution (in the CNT-GO / Cu composite, the volume fraction of the CNT-GO hybrid reinforcement is 1.5%) , and stirred with a high-shear emulsifier for 10 min; then, at the same speed, sodium hydroxide solution was added dropwise until the pH reached 14; CNT-GO / CuO powder was obtained after filtration and drying.

[0043] (3) Preparation of composite powder: After argon hydrogen (H 2 The composite precursor prepared in step (2) was reduced in a tube furn...

Embodiment 3

[0047] (1) Acidification treatment of CNTs: Add CNTs to a mixed solution of concentrated sulfuric acid / concentrated nitric acid (volume ratio 3:1) and heat in a water bath at 70 °C for 4 hours, then filter and dry to obtain acidified CNTs powder.

[0048] (2) Preparation of composite precursor: Add 0.006g of CNT-GO (volume ratio of 6:1, 0.005g of CNTs, 0.001g of GO) into 900ml of deionized water, and use a high-shear emulsifier (6000rpm / min) Stir for 20min, then sonicate for 1.5h; then add 17.37g of copper acetate to the CNT-GO solution (in the CNT-GO / Cu composite, the volume fraction of the CNT-GO hybrid reinforcement is 0.5%) , and stirred with a high-shear emulsifier for 10 min; then, at the same speed, sodium hydroxide solution was added dropwise until the pH reached 14; CNT-GO / CuO powder was obtained after filtration and drying.

[0049] (3) Preparation of composite powder: After argon hydrogen (H 2 The composite precursor prepared in step (2) was reduced in a tube furn...

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Abstract

The invention discloses a preparation method of a CNT-GO / Cu composite material with a hierarchical structure and belongs to the field of metal-based composite material preparation. According to the preparation method, CNTs, GO, sodium hydroxide and copper acetate serve as raw materials, and the CNT-GO / Cu composite material with the hierarchical structure is prepared by adopting a molecule level blending method. The method has the beneficial effects that the process is simple, time is short, and energy consumption is low. Besides, due to the large specific surface area of GO and a high length-diameter ratio of CNTs, after the two are mixed, a mixed reinforced body with a net-shaped structure can be obtained, and the dispersion uniformity of a single reinforced body is improved. In addition,by continuously adjusting a pH value of a solution, the CNT-GO / Cu composite material with the hierarchical structure can be made. The composite material is composed of an enriched area (carbon-rich area) and a depleted area (carbon-poor area) of a carbon nanometer reinforced body, the carbon-rich area can effectively improve the strength of the composite material, and the carbon-poor area can effectively improve the toughness of the composite material, so that the composite material obtains good comprehensive performance.

Description

technical field [0001] The invention relates to a method for preparing a CNT-GO / Cu composite material with a hierarchical structure, and belongs to the technical field of metal matrix composite material preparation. Background technique [0002] Due to its high strength, good corrosion resistance, and excellent electrical and thermal conductivity, copper-based composites have become one of the most promising metal-based composites. Head materials and other fields are widely used. Graphene oxide (GO) is a two-dimensional carbon nanomaterial composed of carbon atoms in sp2 hybrid orbitals, which has attracted extensive attention in recent decades. Its thermal conductivity is 5300W / m K, and its electron mobility is 15000 cm 2 V -1 S -1 , Young's modulus is 1TPa. However, under the action of strong interlayer van der Waals force, GO is easy to accumulate, which greatly reduces its surface area and affects its performance as a composite material reinforcement. [0003] Obt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/105B22F9/22C22C47/14C22C49/02C22C49/14C22C101/10
CPCB22F3/105B22F9/22C22C47/14C22C49/02C22C49/14
Inventor 陶静梅魏霞易健宏鲍瑞刘意春李凤仙李才巨游昕谈松林
Owner KUNMING UNIV OF SCI & TECH
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