Nano-silver-modified graphene fiber and preparation method thereof

A graphene fiber and nano-silver technology, applied in the field of fiber materials, can solve the problems of application and processing properties far inferior to one-dimensional fiber materials, etc., and achieve the effect of expanding applicability and application range and improving machinability

Active Publication Date: 2017-06-27
青岛天银纺织科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the graphene-silver composites prepared by these techniques are all two-dimensional sheet materials or three-dimensional network structures, and their application and processing properties are far inferior to those of one-dimensional fibrous materials.

Method used

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  • Nano-silver-modified graphene fiber and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A nano-silver modified graphene fiber, which is a graphene fiber whose surface is coated with a nano-silver layer with an average diameter of 10nm and a thickness of 100nm and a fiber total diameter of 30 μm, the preparation steps are:

[0024] Step (1) Preparation of graphene oxide spinning solution: uniformly disperse graphene oxide in deionized water to prepare graphene oxide spinning solution with a concentration of 5 mg / ml.

[0025] Step (2) Spinning graphene oxide fibers: the graphene oxide spinning solution prepared in step (1) is passed through a spinning tube with a diameter of 500 μm and a length of 5 cm, and the temperature is 40° C. at a speed of 10 ml / min. Stay in an aqueous coagulation bath containing 5% calcium chloride for 500 seconds, and then wash it with a large amount of deionized water to prepare graphene oxide colloidal fibers.

[0026] Step (3) prepares nano-silver modified graphene oxide colloidal fiber: the graphene oxide colloidal fiber prepare...

Embodiment 2

[0029] A nano-silver modified graphene fiber, which is a graphene fiber whose surface is coated with an average diameter of 55nm, a thickness of 550nm nano-silver layer and a fiber total diameter of 115 μm, the preparation steps are:

[0030] Step (1) Preparation of graphene oxide spinning solution: uniformly disperse graphene oxide in deionized water to prepare graphene oxide spinning solution with a concentration of 17 mg / mL.

[0031] Step (2) Spinning graphene oxide fibers: the graphene oxide spinning solution prepared in step (1) is passed through a spinning tube with a diameter of 2700 μm and a length of 52 cm, and is extruded at a speed of 55 mL / min at a temperature of 80 ° C and Stay in the coagulation bath of methanol solution containing 6% sodium hydroxide for 2000s, and then wash it with a large amount of ethanol and water to prepare graphene oxide colloidal fibers.

[0032] Step (3) prepares nano-silver modified graphene oxide colloidal fiber: the graphene oxide col...

Embodiment 3

[0035] A nano-silver modified graphene fiber, which is a graphene fiber whose surface is coated with an average diameter of 100nm, a thickness of 1000nm nano-silver layer and a fiber total diameter of 200 μm, the preparation steps are:

[0036] Step (1) Preparation of graphene oxide spinning solution: uniformly disperse graphene oxide in deionized water to prepare graphene oxide spinning solution with a concentration of 30 mg / ml.

[0037] Step (2) Spinning graphene oxide fibers: the graphene oxide spinning solution prepared in step (1) is passed through a spinning tube with a diameter of 5000 μm and a length of 100 cm, and is squeezed at a speed of 100 ml / min at a temperature of 120 ° C and Stay in an aqueous coagulation bath containing 10% calcium chloride for 3600s, and then wash it with a large amount of deionized water to prepare graphene oxide colloidal fibers.

[0038] Step (3) prepares nano-silver modified graphene oxide colloidal fiber: the graphene oxide colloidal fib...

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Abstract

The invention discloses a nano-silver-modified graphene fiber which is a graphene fiber coated by a nano silver layer with the average diameter of 1-100nm and the thickness of 10-1000nm, and the overall diameter of the fiber is 3-200 mu m. The preparation process comprises the following steps: preparing a graphene oxide spinning solution, spinning a graphene oxide fiber, preparing the nano-silver-modified graphene oxide fummy fiber, and preparing the nano-silver-modified graphene fiber. The fiber simultaneously has the excellent characteristics of the nano silver and graphene, is in a fiber shape, and has wide application prospects in the fields of structure reinforcement, micro-electronics, heat-conducting materials, radiation protection, textiles and the like.

Description

technical field [0001] The invention belongs to the field of fiber materials. It relates to a graphene fiber, especially a graphene fiber modified with nanometer silver and a preparation method thereof. Background technique [0002] Graphene is a two-dimensional material with a thickness of only one carbon atom. It is the thinnest and hardest nanomaterial known in the world. It is almost completely transparent and only absorbs 2.3% of light; its thermal conductivity is as high as 5300W / m K, higher than that of carbon nanotubes and diamonds; Silicon crystal is high; and the resistivity is only about 10-8Ω·m, which is lower than copper or silver, and is the material with the smallest resistivity in the world. Due to its excellent optical, electrical, thermal and mechanical properties, graphene has extensive potential in structural enhancement, integrated circuits, transistors, conductive electrodes, thermal conductive materials, supercapacitors, filtration, solar cells, biol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/08D06M11/83
CPCD01F9/08D06M11/83
Inventor 卜庆革
Owner 青岛天银纺织科技有限公司
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