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A kind of graphene/nano-twin composite material with controllable structure and preparation method thereof

A composite material and nano-twin technology, applied in the direction of electrolytic coatings, coatings, etc., can solve the problem that the comprehensive performance of materials has not been greatly improved, and achieve the effect of small grains, uniform grains, and regular shapes

Active Publication Date: 2021-05-25
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods can only improve the performance of a certain aspect of the material, and the overall performance of the material has not been greatly improved.

Method used

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  • A kind of graphene/nano-twin composite material with controllable structure and preparation method thereof
  • A kind of graphene/nano-twin composite material with controllable structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The composition ratio of the metal-based composite deposition solution is: 0.8M copper sulfate pentahydrate, 0.05M graphene, 0.2M H 2 SO 4 , sodium polydithiodipropylsulfonate 0.0003M, ethylthiourea 0.0008M, copper chloride 0.0002M; electrodeposition process parameters are: current density 90mA / cm 2 , the temperature is 50°C, the deposition time is 30min; the magnetic field strength is 0.1T, and the angle between the magnetic field direction and the pole plate is 5°. The surface color of the composite material prepared under this condition is dark, the compactness is average, there are a small amount of nano-twins in the microstructure of the composite material, the volume ratio of the nano-twins is 5%, the average thickness of the nano-twinned layer is 150nm, and the grain The average size is 485 nm, and the volume ratio of graphene is 7%.

Embodiment 2

[0023] The composition ratio of the metal-based composite deposition solution is: 0.8M copper sulfate pentahydrate, 0.05M graphene, 0.2M H 2 SO 4 , sodium polydithiodipropylsulfonate 0.0004M, ethylthiourea 0.0007M, copper chloride 0.0003M; electrodeposition process parameters are: current density 90mA / cm 2 , the temperature is 50°C, the deposition time is 30min; the magnetic field strength is 0.3T, and the angle between the magnetic field direction and the pole plate is 20°. The composite material prepared under this condition has a smooth surface and good compactness. The microstructure of the composite material has a certain amount of nano-twins, the volume ratio of the nano-twins is 18%, the average thickness of the nano-twinned layer is 120nm, the grain The average size is 440nm, and the volume ratio of graphene is 5%.

Embodiment 3

[0025] The composition ratio of the metal-based composite deposition solution is: 0.8M copper sulfate pentahydrate, 0.05M graphene, 0.2M H 2 SO 4 , sodium polydithiodipropylsulfonate 0.0005M, ethylthiourea 0.0006M, copper chloride 0.0004M; electrodeposition process parameters are: current density 90mA / cm 2 , the temperature is 50°C, the deposition time is 30min; the magnetic field strength is 0.3T, and the angle between the magnetic field direction and the pole plate is 20°. The composite material prepared under this condition has a smooth surface and good compactness. The microstructure of the composite material has a certain amount of nano-twins, the volume ratio of nano-twins is 22%, the average thickness of the nano-twin layer is 80nm, and The average size is 360nm, and the volume ratio of graphene is 10%.

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Abstract

The invention belongs to the technical field of composite materials, and in particular relates to a graphene nano-twin composite material with controllable structure and a preparation method thereof. This composite material with a new type of controllable microstructure contains nanocrystalline grains (200-500nm) and high-density nano-twins (30-200nm), and the volume percentage of nano-twins is 5%-40%; Graphene, the volume percentage is 5% to 20%; the composite structure only exists in a narrow range of deposited composite materials, and its composition is (D x , Gr y ), 0.05<y≤0.2, x=1-y, D is Cu, Ni, Fe and Zn, etc., Gr is graphene, the composite material with this microstructure is suitable for application in communication engineering, heat exchange devices, conductive wires and other fields.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a graphene / nano-twin composite material with controllable structure and a preparation method. Background technique [0002] Twins refer to two grains or two parts of a grain that form a mirror-symmetric relationship along a common interface (twin plane). Twin boundary is a special low-energy interface, and its interface energy is about 1 / 10 of that of ordinary high-angle grain boundary. Twin boundaries are also much less effective in scattering conduction electrons than ordinary high-angle grain boundaries. The unique characteristics of these twin boundaries affect the mechanical properties, thermal conductivity, and electrical conductivity of materials to a certain extent. It is difficult to control the size and twin density of the twin crystal layer in the existing methods for preparing twins, and it is difficult to obtain a structure with high-density...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D15/00C25D5/00
CPCC25D15/00
Inventor 魏伟贾飞龙魏坤霞储富强杜庆柏胡静
Owner CHANGZHOU UNIV
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