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RGO/Cu composite material and preparation method thereof

A composite material and suspension technology, which is applied in the field of rGO/Cu composite material and its preparation, can solve the problems of high GO content, difficult to distribute uniformly, and small specific surface area of ​​micron commercial copper powder.

Active Publication Date: 2018-11-27
HUNAN UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

In addition, micron-sized commercial copper powder is difficult to distribute evenly when the GO content is high due to its small specific surface area.

Method used

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  • RGO/Cu composite material and preparation method thereof
  • RGO/Cu composite material and preparation method thereof
  • RGO/Cu composite material and preparation method thereof

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Embodiment 1

[0034] In this embodiment, the preparation method of rGO / Cu composite material is as follows:

[0035] Preparation of porous flaky cuprous oxide: first dissolve copper nitrate and glucose in 50ml deionized water at a mass ratio of 10:3, and ultrasonicate for 15 minutes to obtain a uniform mixed solution; then pour the mixed solution into a corundum crucible with a specification of 500ml Heating with a small stove in the air, the aqueous solution undergoes boiling, foaming and burning, and finally forms a porous sponge-like powder.

[0036] Preparation of rGO / Cu composite material: graphene oxide has a thickness of 3.4-7nm, 6-10 layers, a diameter of 10-50 microns, and a specific surface area of ​​100-300 square meters per gram. The prepared porous flaky cuprous oxide and graphene oxide were dispersed in water by ultrasonic for 30 minutes respectively to obtain cuprous oxide suspension (0.1 g / ml) and graphene oxide colloidal suspension (0.001 g / ml); then The graphene oxide col...

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Abstract

The invention relates to an rGO / Cu composite material and a preparation method thereof. Porous sheet-shaped Cu2O is prepared through a solution combustion method, and the copper-base composite material with a different rGO content is prepared through a transposition strategy. When prepared cuprous oxide suspension liquid and graphene oxide colloids are mixed, positive charge-carried Cu2O colloidsare tightly adsorbed on the surfaces of negative charge-carried GO colloids, and therefore GO is evenly dispersed. RGO restrains the growth of particles during reduction, it is ensured that the rGO / Cucomposite material in a powder shape has high sintering activity, and the relative density of sintering is easily increased. Under a grain refinement and dislocation resistance mechanism, rGO is evenly dispersed in a copper matrix, so that the rGO / Cu composite material is enhanced.

Description

technical field [0001] The invention relates to an rGO / Cu composite material and a preparation method thereof, belonging to the field of composite materials. Background technique [0002] Graphene is used as a reinforcement of copper-based composites due to its huge theoretical specific surface area (2630m 2 g -1 ), high thermal conductivity (3000-5000W m -1 K -1 ), good electrical conductivity (106S m -1 ), high Young's modulus of elasticity (1TPa), and excellent tensile strength (125GPa), which have attracted more and more attention in recent years. Graphene-reinforced copper-based composites are expected to become a high-end application field of high-strength conductive copper-based composites. However, due to the poor affinity to metals, it is difficult to achieve uniform dispersion and good interfacial bonding of pristine graphene. Most previous studies on graphite / copper composites mainly used graphene oxide (GO) by solution method followed by in situ reduction d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/22B22F1/00C01G3/02
CPCB22F1/0003B22F9/22C01G3/02C01P2004/03C01P2004/04
Inventor 范泽夫陈小华
Owner HUNAN UNIV
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