A fast-response graphene fiber and preparation method thereof

Abstract

The invention discloses a graphene fiber capable of achieving rapid response and a preparation method thereof. The method comprises the steps that a graphene oxide film is heated to 500-800 DEG C at the speed of 0.1-1 DEG C / min, the temperature is kept constant for 0.5-2 h, and then the graphene oxide film is heated to 1000-1300 DEG C at the speed of 1-3 DEG C / min, the temperature is kept constant for 0.5-3 h, then, the graphene oxide film is heated to 2000-3000 DEG C at the speed of 5-8 DEG C / min, the temperature is kept constant for 0.5-4 h, a graphene film is obtained, and the graphene fiber is obtained after uniform winding. The fiber can achieve rapid response under the high temperature of 30-420 DEG C within a short period of time of 1-20 s under the safety voltage of 0.5-5 V, the graphene fiber can be wound around a heating body and can also be woven into an electric heating cloth for use, the defects that a traditional electric heating material is slow in temperature rise, high in applied voltage and the like are overcome, and the graphene fiber is the good electric heating material and has the industrial prospect.

Description

Technical field [0001] The invention relates to a fast-response graphene fiber and a preparation method thereof. Background technique [0002] In 2004, Professors Andre Jim and Konstantin Novoselov from the University of Manchester in the United Kingdom used micromechanical exfoliation to separate two-dimensional graphene crystals for the first time, and obtained 2010 due to pioneering experiments on two-dimensional graphene materials. The Nobel Prize in Physics was awarded in 2015, and graphene materials have caused extensive research by scientists all over the world. Graphene has high breaking strength and Young's modulus, and excellent electrical properties. Graphene has a conjugated structure and exhibits rich chemical properties. It can be surface modified through different chemical reactions to obtain a series of chemical derivatives. Graphene material has ultra-high thermal conductivity, with an experimental value of 5000W / mK, which can be used as an excellent electric h...

AI Technical Summary

Problems solved by technology

Traditional electrothermal materials such as nickel-chromium alloys have disadvantages such as high cost, high density, heavy weight, easy deformation and complicated processing technology, and are not suitable for irregular substrates, while graphene materials are flexible, light in weight, and simple in manufacturing process , fast heating rate, high thermal response temperature, can be used for substrates of various shapes, and can be made into fabrics that can only generate heat for the human body, used for infrared therapy, etc., and are expected to replace traditional electric heating materials for wide application

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