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Preparation method and application for composite elastomer containing graphene coated copper nanowire

A technology of graphene coating and elastomer, applied in the direction of nanotechnology, nanotechnology, metal/alloy conductors, etc., can solve the problems of performance change, cumbersome steps, easy to fall off, etc., and achieve mild conditions, simple process, and wide sources Effect

Active Publication Date: 2017-05-10
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

When graphene is covered on the metal surface, it can increase the activation energy of oxidation species in the environment to diffuse from the graphene surface to the lower metal interface, forming a barrier, thereby improving the oxidation resistance of the metal, but it is unstable to the copper nanowire structure. The problems of easy collapse, poor mechanical strength, and poor compression resilience seem to have little effect, and changes in material morphology and structure will lead to changes in performance, reduced reliability, and shortened service life
[0003] CN105772741A mixes at least one of the graphene / copper nanowire composite material with sodium alginate solution, polyvinyl alcohol solution, chitosan solution, and gelatin solution, using sodium alginate, polyvinyl alcohol, chitosan solution, The intramolecular or intermolecular hydrogen bonds formed by gelatin in water provide a skeleton support for the three-dimensional airgel structure. This preparation method requires firstly synthesizing the graphene / copper nanowire composite material separately and purifying and drying it. Steps Complicated, the force between the graphene / copper nanowire composite and the skeleton in the product is weak and easy to fall off

Method used

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  • Preparation method and application for composite elastomer containing graphene coated copper nanowire
  • Preparation method and application for composite elastomer containing graphene coated copper nanowire
  • Preparation method and application for composite elastomer containing graphene coated copper nanowire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] 10 mL of Cu(NO with a concentration of 0.1 mol / L 3 ) 2 The solution was mixed evenly with 5 mL of graphene oxide aqueous solution with a concentration of 2 mg / mL. Then add 2mL of 99% ethylenediamine solution, stir for 25min, then add 200mL of 10mol / L NaOH solution and keep stirring for 50min, then add 0.2mL of 35% hydrazine hydrate solution, and sonicate for 15min, then deionized water Sponge cleaned ultrasonically for 10 minutes and dried at 60°C was added to the reaction solution, and continued to be ultrasonically treated for 20 minutes. Finally, the reaction system was reacted in a water bath at 70°C for 80 minutes, and the obtained product was dried in a vacuum oven at room temperature for 24 hours. Finally, a graphene-coated copper nanowire foam can be obtained with a conductivity of 9×10 -2 S / m.

[0052] figure 1 It is the scanning electron micrograph of the sponge after drying in embodiment 1. from figure 1 It can be seen that the dried sponge itself has a...

Embodiment 2

[0062] 15 mL of Cu(NO with a concentration of 0.05 mol / L 3 ) 2 The solution was mixed evenly with 5 mL of graphene oxide aqueous solution with a concentration of 1 mg / mL. Then add 3mL of 80% ethylenediamine solution, stir for 20min, then add 250mL of 5mol / L NaOH solution and continue stirring for 45min, then add 0.3mL of 35% hydrazine hydrate solution, and ultrasonic for 25min, then deionized water Sponge cleaned ultrasonically for 10 minutes and dried at 60°C was added to the reaction solution, and continued to be ultrasonically treated for 15 minutes. Finally, the reaction system was reacted in a water bath at 60°C for 90 minutes, and the obtained product was dried in a vacuum oven at room temperature for 12 hours. Finally, graphene-coated copper nanowire foam can be obtained. Its conductivity is 5×10 -2 S / m, after being pressed and released, it can rebound and return to its original shape within 1.5 seconds. After the first press and release, its resistance change rate i...

Embodiment 3

[0064] 20 mL of Cu(NO with a concentration of 0.1 mol / L 3 ) 2 The solution was mixed evenly with 5 mL of graphene oxide aqueous solution with a concentration of 2 mg / mL. Then add 4 mL of 60% ethylenediamine solution, stir for 30 min, then add 400 mL of 15 mol / L NaOH solution and continue stirring for 60 min. Finally, 0.4 mL of 80% hydrazine hydrate solution was added, and ultrasonicated for 25 minutes, then the sponge that was ultrasonically cleaned with deionized water for 10 minutes and dried at 60°C was added to the reaction solution, and ultrasonic treatment was continued for 15 minutes. Finally, the reaction system was placed in React in a water bath at 90°C for 50 minutes, and dry the obtained product in a vacuum oven at room temperature for 20 hours to finally obtain a graphene-coated copper nanowire foam.

[0065] Its conductivity is 7×10 -2 S / m, after being pressed and released, it can rebound and return to its original shape within 1.5 seconds. After the first pre...

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Abstract

The invention relates to a composite elastomer containing a graphene coated copper nanowire. The composite elastomer comprises a porous material and a graphene coated metal nanowire. The graphene coated metal nanowire is grown on a skeleton of the porous material. The porous material is a rebounding porous material. The composite elastomer containing the graphene coated copper nanowire provided by the invention can rebound and recover to an original shape within 2 seconds after being pressed and released, after the composite elastomer is pressed and released for the first time, a resistance change rate is smaller than 2%, after the composite elastomer is pressed and released for 100 times, the composite elastomer can still rebound to the original shape, and the resistance change rate is smaller than 10%.

Description

technical field [0001] The invention relates to the technical field of nanomaterial preparation, in particular to a preparation method and application of a composite elastomer containing graphene-coated copper nanowires. 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 mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B5/14H01B1/04H01B1/02H01B13/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01B1/026H01B1/04H01B5/14H01B13/00
Inventor 胡友根朱玉朱朋莉赵涛孙蓉
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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