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Method for preparing graphene fibers by cutting graphite oxide film and heating

A technology of graphene fiber and graphite fiber, which is applied in the direction of fiber processing, fiber chemical characteristics, continuous winding spinning machine, etc., can solve the problems of complex process, large drying energy consumption, etc., and achieve uniform structure, good flexibility, Effects from a wide range of sources

Active Publication Date: 2018-01-30
ZHONGYUAN ENGINEERING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method for preparing graphene fibers by a dry method in view of the defects that the preparation method of graphene fibers using a wet method requires large drying energy consumption and complicated processes in the prior art

Method used

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  • Method for preparing graphene fibers by cutting graphite oxide film and heating
  • Method for preparing graphene fibers by cutting graphite oxide film and heating

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] like figure 1 As shown, an ultra-thin graphite oxide film 1 with a diameter of 60 cm, a height of 10 cm, and a thickness of 30 μm (width 100 mm) is rolled. During the unwinding process, a layer of 5 μm is coated on the surface of the graphene film by the slit coating head 2. Thick titanium oxide nanotube aqueous emulsion (solid content 1%), then, through the guide roller 3, use the ultrasonic blade module film slitting machine 4 to cut into 200 pieces with a width of 0.5mm at a speed of 80m / s Continuous graphite oxide fiber; each one is a group of jetting air through the fluid nozzle for twisting, and then the high-frequency electromagnetic heating tube 5 heats each twisted graphene oxide yarn at a position 10 cm away from the nozzle, and the graphite oxide fiber transformed into graphene fibers. The above graphene fibers are output to the winding forming device, and directly made into a graphene fiber bobbin 6 with a certain winding capacity and twist, and the twistin...

Embodiment 2

[0026] Cut the ultra-thin graphite oxide film with a diameter of 60cm, a height of 10cm, and a thickness of 30μm (width 100mm) into 1000 pieces with a width of 0.1mm at a speed of 80m / s by an ultrasonic blade module film slitting machine. The continuous graphite oxide fiber; every 2 is a group of twisted by spraying air through the fluid nozzle, and then the high-frequency electromagnetic heating tube heats each twisted graphene oxide yarn at a position 10 cm away from the nozzle, and the graphite oxide fiber transformed into graphene fibers. The above graphene fibers are output to the winding forming device, and directly made into a graphene fiber bobbin with a certain volume capacity and twist. Twisting synchronously increases the bonding fastness of graphene sheets, which solves the problem of little improvement in the strength of graphene fibers prepared by other methods; the obtained graphene fibers have a diameter of 0.18 mm, twist, and a breaking strength greater than 2...

Embodiment 3

[0028] Cut the ultra-thin graphite oxide film with a diameter of 60cm, a height of 10cm, and a thickness of 30μm (width 100mm) into 6250 pieces with a mechanical rotary circular blade module film slitting machine at a speed of 80m / s. 0.015mm continuous graphite oxide fiber; each group of 10 is twisted by spraying air through the fluid nozzle, and then the high-frequency electromagnetic heating tube heats each twisted graphene oxide fiber at a position 10 cm away from the nozzle to oxidize The graphite fiber is converted into graphene fiber, and the above graphene fiber is output to the winding forming device, and directly made into a graphene fiber bobbin with a certain winding capacity and twist. Twisting synchronously increases the bonding fastness of graphene sheets, which solves the problem that the strength of graphene fibers prepared by other methods is not greatly improved; the obtained graphene fibers have a diameter of 0.15mm, twist, and a breaking strength greater tha...

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Abstract

The invention discloses a method for preparing graphene fibers by cutting graphite oxide films and heating them. The graphite oxide films are cut into continuous graphite oxide fibers by a film slitting machine; every 1-10 continuous graphite oxide fibers are formed into a group of The fluid nozzle sprays air for twisting, and then uses a high-frequency electromagnetic heating tube to heat the twisted graphite oxide fiber at a position 10 cm away from the nozzle to convert the graphite oxide fiber into a graphene fiber; the obtained graphene fiber is output to a coil Winding the forming device to directly make a twisted graphene fiber bobbin. The operation process of this method is simple. After reasonable design and matching of corresponding mature accessories, graphene fibers can be directly obtained from pure graphene oxide composite films without subsequent treatment and impurity removal; and a specific package is formed to facilitate the next step. industrial application; the prepared graphene fiber has a twist, the graphene sheets are closely combined, the appearance and internal structure of the graphene fiber are uniform, and the mechanical properties are excellent.

Description

technical field [0001] The invention belongs to the technical field of preparation of graphene oxide and graphene materials, in particular to a method for preparing graphene fibers by cutting and heating graphite oxide films, which belongs to the dry spinning method. Background technique [0002] As the most basic structural unit of all carbon materials, graphene has a true monoatomic layer thickness and strict two-dimensional structure, and has high mechanical strength, elasticity, thermal conductivity, and electron mobility (100,000cm2 V-1 s -1) and quantum Hall effect etc. Since the discovery of graphene by British scientists Andrea Gem and Costiano Voseno in 2010 and won the Nobel Prize, graphene research has reached an unprecedented research climax, and more and more studies have found that graphene can be used for Field-effect transistors, high-frequency devices, super microprocessors and single-molecule detectors, etc. The three-dimensional structural materials comp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01H4/02D01H13/28D01D5/42D01F9/12
Inventor 张迎晨吴红艳
Owner ZHONGYUAN ENGINEERING COLLEGE
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