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Method for preparing graphene fiber by casting method

A technology of graphene fiber and casting method, which is applied in the direction of fiber chemical characteristics, continuous winding spinning machine, textile and papermaking, etc., which can solve the problems of large drying energy consumption and complicated process, and achieve uniform structure and easy operation. Simple process and tight effect

Active Publication Date: 2017-11-07
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 dry method in order to overcome the disadvantages of large drying energy consumption and complicated process in the prior art for preparing graphene fibers by wet method

Method used

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  • Method for preparing graphene fiber by casting method
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Embodiment 1

[0025] The invention relates to a device and method for casting graphene fibers and yarns, and belongs to the technical field of graphene oxide and graphene material preparation. The method is as follows: the mixed solution of 3 parts of worm-like expanded graphite, 100 parts of distilled water and 0.01 part of surfactant (sodium dodecylbenzenesulfonate) is passed through a liquid stirring pulverizer (emulsifier) ​​with a rotation speed of 50,000 rpm. ) to obtain graphite oxide colloidal liquid, which was concentrated to obtain 25 mg·mL -1 Graphite oxide colloid liquid, the colloid is extruded by casting equipment 1 and cast onto the surface of grooved PTFE conductive belt 2, dried by dryer 3 at 60°C, and then the strip is clamped by stainless steel belt Continuous output, during which the 5-ton pressure roller 4 is compacted to obtain a graphene oxide strip with a thickness of 16 μm and a width of 0.5mm. 5. After spraying through the hole at the end of the nozzle to the corr...

Embodiment 2

[0027] The invention relates to a device and method for casting graphene fibers and yarns, and belongs to the technical field of graphene oxide and graphene material preparation. The method is as follows: the mixed solution of 1-3 parts of worm-like expanded graphite, 100 parts of distilled water and 0.2 parts of surfactant (betaine) is processed by a liquid stirring pulverizer (emulsifier) ​​with a rotation speed of 10,000 rpm to obtain Graphite oxide colloidal solution, obtained after concentration 20 mg·mL -1 Graphite oxide colloid liquid, the colloid is extruded and cast onto the surface of the grooved PTFE conductive tape through the casting equipment, and dried at 80°C by the dryer, and then the strip is clamped and output by the stainless steel belt, during which it passes through 2 Tons of pressure rollers were compacted to obtain graphene oxide strips with a thickness of 50 μm and a width of 0.5 mm. The strip is twisted by spraying air through the fluid nozzle, and a...

Embodiment 3

[0029] The invention relates to a device and method for casting graphene fibers and yarns, and belongs to the technical field of graphene oxide and graphene material preparation. The method is as follows: the mixed solution of 1 part of worm-like expanded graphite, 100 parts of distilled water and 0.03 part of surfactant (dodecyltrimethylammonium chloride) is passed through a liquid stirring pulverizer with a rotating speed of 20,000 rpm ( emulsifying machine) to obtain graphite oxide colloidal liquid, which was concentrated to obtain 25mg·mL -1Graphite oxide colloid liquid, the colloid is extruded by casting equipment and cast onto the surface of the grooved PTFE conductive tape, dried by a dryer at 60-80°C, and then the strip is clamped and output by a stainless steel belt. After being compacted by a 1-ton pressure roller, a graphene oxide strip with a thickness of 16 μm and a width of 0.5 mm is obtained. The graphene oxide strip is twisted by jetting air through a fluid noz...

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Abstract

The invention discloses a method for preparing graphene fibers by a casting method. Vermicular expanded graphite, distilled water, and surfactants are uniformly mixed according to the weight ratio of 1-3:100:0.01-1 to obtain a mixed solution, which is passed through the liquid Graphite oxide colloidal liquid is obtained after being processed and concentrated by a stirring pulverizer; the graphite oxide colloidal liquid is extruded and cast onto the surface of the grooved PTFE conductive band through the casting equipment, and graphene oxide strips are formed after drying; graphene oxide The strip is clamped and output by the stainless steel belt, during which it is compacted by the pressure roller, and then the air is sprayed through the fluid nozzle for twisting, and the laser beam is shot to the corresponding twisting point through the hole at the end of the nozzle, and the graphene oxide strip is transformed into graphite vinyl fibers. The method is simple to operate and does not require follow-up treatment and impurity removal; a large amount of graphene fibers can be obtained, which is convenient for the next industrial application; the graphene fibers have twist, interlayer bonding is tight, the appearance and internal structure 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, and in particular relates to a device and a method for preparing graphene fibers and yarns by a casting method, and the method is a 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 mate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01H4/02D01H13/28D01F9/12B29C41/28
Inventor 张迎晨吴红艳
Owner ZHONGYUAN ENGINEERING COLLEGE
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