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Copper nanowire/graphene composite material and preparation method and application thereof

A technology of copper nanowires and composite materials, applied in conductive materials, conductive materials, nanotechnology and other directions, can solve the problems of difficulty in controlling the oxygen content of reduced graphene oxide and the limitation of electrical conductivity, and achieve a convenient, fast and universal realization process. High performance, excellent antioxidant effect

Inactive Publication Date: 2017-05-24
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The oxygen content in the reduced graphene oxide in the composite obtained by this method is difficult to control at a low level, and the conductivity is limited

Method used

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  • Copper nanowire/graphene composite material and preparation method and application thereof
  • Copper nanowire/graphene composite material and preparation method and application thereof
  • Copper nanowire/graphene composite material and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] 1) Ultrasonic disperse 30 mg of copper nanowires with an average diameter of 50 nm and 20 mg of graphene in 1.2 mL of deionized water to obtain a mixed dispersion; wherein graphene is prepared by non-oxidative exfoliation of graphite, and its average sheet thickness is 1 nm, mixed with Doped with 3wt% sulfur and 10wt% nitrogen;

[0043] 2) vacuum filter the mixed dispersion obtained in step 1), the pore size of the filter membrane used is 0.45 μm, and then dry the filter cake to obtain a composite film with a thickness of 40 μm and an electrical conductivity of 2.88×10 4 S / m.

[0044] Observe the product obtained in embodiment 1 under a scanning electron microscope, as figure 1 and figure 2 As shown, it can be seen that the composite film retains the sheet-like structure of graphene, and copper nanowires are embedded on each graphene sheet and covered by graphene layers. In this way, there is a protective barrier between the copper nanowires and the outside world, w...

Embodiment 2

[0054] The only difference from Example 1 is that the average sheet thickness of graphene is 5nm. The electrical conductivity of the obtained composite film is 1.5×10 4 S / m, its conductivity is 90% of the initial conductivity after being placed in the air at room temperature for 60 days.

Embodiment 3

[0056] The only difference from Example 1 is that the average sheet thickness of graphene is 8nm. The electrical conductivity of the obtained composite film is 1.3×10 4 S / m, its conductivity is 92% of the initial conductivity after being placed in the air at room temperature for 60 days.

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Abstract

The invention relates to a preparation method of copper nanowire / graphene composite material. The preparation method comprises the following steps that (1) a copper nanowire and graphene are dispersed in deionized water so as to obtain mixed dispersion liquid, wherein the average sheet thickness of graphene is 0.5-5nm; and (2) the mixed dispersion liquid obtained in the step (1) is filtered and then a filter cake is dried so as to obtain the copper nanowire / graphene composite material. The preparation method is simple and efficient, convenient and rapid in experimental flow, simple in process, moderate in condition and high in universality. Compared with the method of reduction of graphene oxide in the prior art, reduction of the graphene oxide is not required so that the limitation of conductivity of the composite material by using binders can be avoided, the electric conductivity of the prepared copper nanowire / graphene composite material can be more than 5x103S / m, the composite material also has great oxidation resistance, and the electric conductivity can still be maintained for over 90% of the initial electric conductivity after the composite material is arranged in room temperature for 60 days.

Description

technical field [0001] The invention relates to the technical field of nanomaterial preparation, in particular to a copper nanowire / graphene composite material and its preparation method and application. Background technique [0002] Using low-dimensional materials as fillers in conductive composites can obtain excellent electrical conductivity. Metal nanowires have been widely used because of their large specific surface area and good electrical conductivity. Among them, the performance of gold and silver nanowires is superior, but their high price is the main factor limiting their application. Copper nanowires have received more and more attention because of their low price, abundant reserves, and good electrical conductivity. Related fields also have very important application prospects. However, the easy oxidation of copper nanowires limits its application in some aspects. The research on graphene as an effective anti-corrosion and anti-oxidation material has graduall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/32H01B1/04H01B1/02B82Y30/00B82Y40/00
CPCY02E60/13H01G11/32B82Y30/00B82Y40/00H01B1/02H01B1/026H01B1/04
Inventor 孙蓉朱玉胡友根朱朋莉赵涛
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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