CN103145124A - High-performance graphene paper and preparation method thereof - Google Patents
High-performance graphene paper and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a graphene paper with excellent overall performance and a preparation method thereof for solving the problem that the mechanical property and the conductivity of the graphene paper in the present preparation technique are hard to improve simultaneously. The invention provides a simple method for preparing high-performance graphene paper, which comprises the following steps of: firstly, using a two-step chemical reduction method to obtain high-conductivity graphene powder, then putting the prepared high-conductivity graphene powder into a mold, and performing thermal-treatment molding at 100-900 DEG C under a pressure of 1-10 Mpa in certain vacuum, argon or hydrogen environment, and thus obtaining a graphene paper with excellent mechanical property and conductivity both. The mechanical strength and conductivity of the graphene paper are both higher than that of the present reported graphene paper, and the graphene paper disclosed by the invention have great application prospect in all fields of electromagnetic shielding, electrode material, high radiation, corrosion resistance, wear resisting material and the like as a structure and function integrated material.
Description
Technical field
The present invention relates to Graphene and preparation method thereof, particularly a kind of high-performance Graphene paper and preparation method thereof and application.
Background technology
Graphene is thin, the hardest nano material in present world, is almost transparent, only absorbs 2.3% light, and thermal conductivity is 5300W/mK, higher than CNT (carbon nano-tube) and diamond, and electronic mobility＞15000cm under normal temperature
2/ Vs, greater than CNT (carbon nano-tube) and silicon crystal, and resistivity only has 10
-6Ω cm, also lower than copper, silver, be the material of resistivity minimum at present, be with a wide range of applications at aspects such as novel electron device, matrix material, solar cell, super capacitor, hydrogen storage material such as the nanometer electronic device in future and unicircuit, flexible electronic device, ultra-high sensitive senser elements.Although grapheme material has the characteristic of above excellence, to use at present lessly, one of subject matter is to be difficult to obtain the Graphene self-supported membrane material that mechanical property and conductivity are optimized simultaneously.Gordon G.Wallace is at Adv.Mater(2008,20,3557 – 3561), adopt filtration under diminished pressure to obtain the graphene film (thickness is 6.0 μ m) of self-supporting, be Graphene paper, through after pyroprocessing, (electric conductivity is 351Scm to the Graphene paper mechanical strength that makes (tensile strength is 293.3MPa) with conductivity
-1) higher.But, aforesaid method prepares mechanical property and conductivity and theoretical value and also falls far short, and the Graphene paper that above-mentioned preparation method obtains is not suitable for suitability for industrialized production, be difficult to be applied at actual product, be necessary to seek simple method, realize the extensive preparation of Graphene paper, and obtain the Graphene paper of mechanical property and conductivity excellence.
Summary of the invention
Be difficult to prepare in enormous quantities the excellent Graphene paper problem of over-all properties (mechanical property and conductivity) for solving to exist in prior art, the invention provides a kind of preparation method that can prepare in enormous quantities high-performance Graphene paper.
The present invention adopts following technical scheme to realize:
A kind of high-performance Graphene paper is characterized in that, described Graphene paper is to adopt the pure graphene powder hot pressing of two step chemical preparations to get.
Described Graphene paper, its thickness are 500nm～5mm, and electric conductivity is 260～1350S/cm, and mechanical stretch intensity is 180～950Mpa, and Young's modulus is 45～110Gpa.
The present invention provides a kind of preparation method of high-performance Graphene paper simultaneously, and its step is as follows:
(1) under condition of ice bath, 1.0g～5g graphite is joined in the vitriol oil of 50～200ml violent stirring 20～40min; Further with 8g～20g KMnO
4Join in above-mentioned mixed solution violent stirring 20～40min; Above-mentioned mixed solution is transferred in 10 ℃～30 ℃ water-baths, slowly added 10g～30gNaNO
3, stir 40min～80min; Under stirring state, 100ml～300ml deionized water is joined in above-mentioned mixed solution continuously, then it is transferred in the oil bath with 60 ℃～100 ℃ of temperature, stir 20～40min time; Dropwise add again 10ml～40mlH
2O
2, continue reaction 40min～80min until solution becomes glassy yellow from dark-brown;
(2) stirring under environment, dripping hydrazine hydrate and the PVP mixing solutions of 10ml～40ml in above-mentioned glassy yellow graphene oxide solution, reacting 30min～2h at 40 ℃～80 ℃ temperature; Further drip also original reagent of 20ml in mentioned solution, continue reaction 20～60min, the black powder that is precipitated; Above-mentioned powder is centrifugal, and water cleans, and repeats 2 times, and is then centrifugal again, cleans 1 time with ethanol, and drying is 24 hours under less than 50 ℃;
(3) a certain amount of above-mentioned dried graphene powder is joined in mould, under the hot pressing environment that certain pressure, certain atmosphere surrounding and temperature consist of, the mold pressing certain hour can prepare the controlled Graphene paper of thickness and area.
The preparation method of described Graphene paper, described in step (2), the concentration of the PVP aqueous solution is 1～15wt%.
The preparation method of described Graphene paper, the described original reagent of going back of step (2) is acetic acid or hydroiodic acid HI.
The preparation method of described Graphene paper, the described concentration of aqueous solution of going back original reagent of step (2): acetic acid is that 10～30wt%, hydroiodic acid HI are 10～40wt%.
The preparation method of described Graphene paper, the atmosphere surrounding described in step (3) is: vacuum, argon gas or hydrogen; Wherein vacuum tightness is 30KPa～0.1Mpa, and argon pressure is 30KPa～1Mpa, and hydrogen pressure is 30KPa～1Mpa.
The preparation method of described Graphene paper, in step (3), the temperature of described hot pressing environment is 100 ℃～900 ℃, pressure is 1～10Mpa.
The preparation method of described Graphene paper, in step (3), described clamp time is: 5～60min.
Above the Graphene paper of described method preparation, can be separately or with other material (as macromolecular material, metallic substance etc.) be hot pressed into stratified composite as the structure-function integrated material be used for electromagnetic shielding, electrode materials, highly dispel the heat, corrosion-resistant, high-abrasive material etc.
Compared with prior art, the present invention has following advantage:
Relatively present method, but low temperature high yield in enormous quantities prepares the graphene powder of high conductivity, has reduced cost, lays a good foundation for preparing high-performance Graphene paper; Relatively present preparation method, the present invention adopt compression molding to prepare thickness and the controlled Graphene paper of area, lay a good foundation for preparation structure-function integrated material, expanded the range of application of grapheme material, and operating process are simple, but industrialization; Relatively present preparation method, legal system of the present invention is all higher than existing graphene film or paper with electroconductibility for obtaining the graphene film mechanical property.
Embodiment
The present invention is further illustrated below in conjunction with specific embodiment.
Embodiment 1
Under condition of ice bath, 3.0g graphite is joined in the vitriol oil of 60ml, violent stirring 30min is further with 12gKMnO
4Join in above-mentioned mixed solution violent stirring 30min.Above-mentioned mixed solution is transferred in 30 ℃ of water-baths, slowly added 18gNaNO
3, stir 60min; Under stirring state, the 140ml deionized water is joined in above-mentioned mixed solution continuously, then it is transferred in the oil bath with 90 ℃ of temperature, stir the 30min time; Dropwise add again 18mlH
2O
2, continue reaction 60min and make solution become glassy yellow from dark-brown; Stirring under environment, dripping 20ml acetic acid (concentration is 30wt%) and go back original reagent in above-mentioned glassy yellow graphene oxide solution, reacting 1h at 60 ℃ of temperature, obtaining black powder.Above-mentioned powder is centrifugal, and water cleans, and repeats 2 times, and is then centrifugal again, cleans 1 time with ethanol, and drying is 24 hours under 40 ℃.Above-mentioned dried graphene powder is joined in mould mold pressing 5min at 1.0Mpa pressure, ar gas environment (30Kpa) and 100 ℃ of temperature.Can prepare the thick Graphene paper of 10 μ m by aforesaid method, electric conductivity is 150S/cm, and mechanical stretch intensity is 120Mpa, and Young's modulus is 45Gpa.
Embodiment 2
Under condition of ice bath, 3.0g graphite is joined in the vitriol oil of 60ml, violent stirring 30min is further with 12gKMnO
4Join in above-mentioned mixed solution violent stirring 30min.Above-mentioned mixed solution is transferred in 30 ℃ of water-baths, slowly added 18gNaNO
3, stir 60min; Under stirring state, the 140ml deionized water is joined in above-mentioned mixed solution continuously, then it is transferred in the oil bath with 90 ℃ of temperature, stir the 30min time; Dropwise add again 18mlH
2O
2, continue reaction 60min and make solution become glassy yellow from dark-brown; Stirring under environment, dripping 20ml acetic acid (concentration is 30wt%) and go back original reagent in above-mentioned glassy yellow graphene oxide solution, reacting 1h at 60 ℃ of temperature, obtaining black powder.Above-mentioned powder is centrifugal, and water cleans, and repeats 2 times, and is then centrifugal again, cleans 1 time with ethanol, and drying is 24 hours under 40 ℃.Above-mentioned dried graphene powder is joined in mould mold pressing 20min at 10Mpa pressure, ar gas environment (1.0Mpa) and 900 ℃ of temperature.Can prepare the thick Graphene paper of 75 μ m by aforesaid method, electric conductivity is 690S/cm, and mechanical stretch intensity is 430Mpa, and Young's modulus is 75Gpa.
Embodiment 3
Under condition of ice bath, 3.0g graphite is joined in the vitriol oil of 60ml, violent stirring 30min is further with 12gKMnO
4Join in above-mentioned mixed solution violent stirring 30min.Above-mentioned mixed solution is transferred in 30 ℃ of water-baths, slowly added 18gNaNO
3, stir 60min; Under stirring state, the 140ml deionized water is joined in above-mentioned mixed solution continuously, then it is transferred in the oil bath with 90 ℃ of temperature, stir the 30min time; Dropwise add again 18mlH
2O
2, continue reaction 60min and make solution become glassy yellow from dark-brown; Stirring under environment, dripping 20ml acetic acid (concentration is 30wt%) and go back original reagent in above-mentioned glassy yellow graphene oxide solution, reacting 1h at 60 ℃ of temperature, obtaining black powder.Above-mentioned powder is centrifugal, and water cleans, and repeats 2 times, and is then centrifugal again, cleans 1 time with ethanol, and drying is 24 hours under 40 ℃.Above-mentioned dried graphene powder is joined in mould mold pressing 5min at 10Mpa pressure, hydrogen environment (1.0Mpa) and 100 ℃ of temperature.Can prepare the thick Graphene paper of 74 μ m by aforesaid method, electric conductivity is 750S/cm, and mechanical stretch intensity is 550Mpa, and Young's modulus is 69Gpa.
Embodiment 4
Under condition of ice bath, 3.0g graphite is joined in the vitriol oil of 60ml, violent stirring 30min is further with 12gKMnO
4Join in above-mentioned mixed solution violent stirring 30min.Above-mentioned mixed solution is transferred in 30 ℃ of water-baths, slowly added 18gNaNO
3, stir 60min; Under stirring state, the 140ml deionized water is joined in above-mentioned mixed solution continuously, then it is transferred in the oil bath with 90 ℃ of temperature, stir the 30min time; Dropwise add again 18mlH
2O
2, continue reaction 60min and make solution become glassy yellow from dark-brown; Stirring under environment, dripping 20ml acetic acid (concentration is 30wt%) and go back original reagent in above-mentioned glassy yellow graphene oxide solution, reacting 1h at 60 ℃ of temperature, obtaining black powder.Above-mentioned powder is centrifugal, and water cleans, and repeats 2 times, and is then centrifugal again, cleans 1 time with ethanol, and drying is 24 hours under 40 ℃.The graphene powder of 0.5g after above-mentioned drying is joined in mould mold pressing 20min at 10Mpa pressure, hydrogen environment (1.0Mpa) and 900 ℃ of temperature.Can prepare the thick Graphene paper of 73 μ m by aforesaid method, electric conductivity is 880S/cm, and mechanical stretch intensity is 690Mpa, and Young's modulus is 85Gpa.
Embodiment 5
Under condition of ice bath, 3.0g graphite is joined in the vitriol oil of 60ml, violent stirring 30min is further with 12gKMnO
4Join in above-mentioned mixed solution violent stirring 30min.Above-mentioned mixed solution is transferred in 30 ℃ of water-baths, slowly added 18gNaNO
3, stir 60min; Under stirring state, the 140ml deionized water is joined in above-mentioned mixed solution continuously, then it is transferred in the oil bath with 90 ℃ of temperature, stir the 30min time; Dropwise add again 18mlH
2O
2, continue reaction 60min and make solution become glassy yellow from dark-brown; Stirring under environment, dripping 20ml acetic acid (concentration is 30wt%) and go back original reagent in above-mentioned glassy yellow graphene oxide solution, reacting 1h at 60 ℃ of temperature, obtaining black powder.Above-mentioned powder is centrifugal, and water cleans, and repeats 2 times, and is then centrifugal again, cleans 1 time with ethanol, and drying is 24 hours under 40 ℃.The graphene powder of 1g after above-mentioned drying is joined in mould mold pressing 10min at 10Mpa pressure, hydrogen environment (0.5Mpa) and 500 ℃ of temperature.Can prepare the thick Graphene paper of 4mm by aforesaid method, electric conductivity is 750S/cm, and mechanical stretch intensity is 550Mpa, and Young's modulus is 75Gpa.
Claims (10)
1. a high-performance Graphene paper, is characterized in that, described Graphene paper is to adopt the pure graphene powder hot pressing of two step chemical preparations to get.
2. Graphene paper as claimed in claim 1, is characterized in that, its thickness is 500nm～5mm, and electric conductivity is 260～1350S/cm, and mechanical stretch intensity is 180～950Mpa, and Young's modulus is 45～110Gpa.
3. the preparation method of a high-performance Graphene paper, is characterized in that, its step is as follows:
(1) under condition of ice bath, 1.0g～5g graphite is joined in the vitriol oil of 50～200ml violent stirring 20～40min; Further with 8g～20g KMnO
4Join in above-mentioned mixed solution violent stirring 20～40min; Above-mentioned mixed solution is transferred in 10 ℃～30 ℃ water-baths, slowly added 10g～30gNaNO
3, stir 40min～80min; Under stirring state, 100ml～300ml deionized water is joined in above-mentioned mixed solution continuously, then it is transferred in the oil bath with 60 ℃～100 ℃ of temperature, stir 20～40min time; Dropwise add again 10ml～40mlH
2O
2, continue reaction 40min～80min until solution becomes glassy yellow from dark-brown;
(2) stirring under environment, dripping hydrazine hydrate and the PVP mixing solutions of 10ml～40ml in above-mentioned glassy yellow graphene oxide solution, reacting 30min～2h at 40 ℃～80 ℃ temperature; Further drip also original reagent of 20ml in mentioned solution, continue reaction 20～60min, the black powder that is precipitated; Above-mentioned powder is centrifugal, and water cleans, and repeats 2 times, and is then centrifugal again, cleans 1 time with ethanol, and drying is 24 hours under less than 50 ℃;
(3) a certain amount of above-mentioned dried graphene powder is joined in mould, under the hot pressing environment that certain pressure, certain atmosphere surrounding and temperature consist of, the mold pressing certain hour can prepare the controlled Graphene paper of thickness and area.
4. the preparation method of Graphene paper as claimed in claim 3, is characterized in that, described in step (2), the concentration of the PVP aqueous solution is 1～15wt%.
5. the preparation method of Graphene paper as claimed in claim 3, is characterized in that, the described original reagent of going back of step (2) is acetic acid or hydroiodic acid HI.
6. the preparation method of Graphene paper as claimed in claim 5, is characterized in that, the described concentration of aqueous solution of going back original reagent of step (2): acetic acid is that 10～30wt%, hydroiodic acid HI are 10～40wt%.
7. the preparation method of Graphene paper as claimed in claim 3, is characterized in that, the atmosphere surrounding described in step (3) is: vacuum, argon gas or hydrogen; Wherein vacuum tightness is 30KPa～0.1Mpa, and argon pressure is 30KPa～1Mpa, and hydrogen pressure is 30KPa～1Mpa.
8. the preparation method of Graphene paper as claimed in claim 3, is characterized in that, in step (3), the temperature of described hot pressing environment is 100 ℃～900 ℃, and pressure is 1～10Mpa.
9. the preparation method of Graphene paper as claimed in claim 3, is characterized in that, in step (3), described clamp time is: 5～60min.
10. with the Graphene paper of the described method of claim 3 to 9 preparation separately or be hot pressed into stratified composite with macromolecular material, metallic substance and be used for electromagnetic shielding, electrode materials, high heat radiation, corrosion-resistant, high-abrasive material as the structure-function integrated material.
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Cited By (9)
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|---|---|---|---|---|
| CN103787315A (en) * | 2013-12-26 | 2014-05-14 | 中山大学 | Preparation method of graphene sheets |
| CN104231295A (en) * | 2014-09-10 | 2014-12-24 | 中国科学院金属研究所 | Preparation method of graphene prepreg |
| CN104401987A (en) * | 2014-11-26 | 2015-03-11 | 东华大学 | Preparation method of porous graphene flexible foam |
| CN104743551A (en) * | 2015-03-27 | 2015-07-01 | 上海应用技术学院 | Method for preparing reduced graphene oxide heat conductive film |
| CN108859300A (en) * | 2018-06-14 | 2018-11-23 | 沈阳航空航天大学 | A kind of high sensitivity graphene flexibility strain transducer and preparation method thereof |
| CN108910865A (en) * | 2018-07-21 | 2018-11-30 | 哈尔滨工业大学 | A method of preparing graphene/graphene nanobelt mixed film |
| CN110395716A (en) * | 2019-07-26 | 2019-11-01 | 中国电子科技集团公司第三十三研究所 | A kind of preparation method of the microwave defense material based on graphene |
| CN113555229A (en) * | 2020-04-26 | 2021-10-26 | 中天超容科技有限公司 | Graphene paper current collector, preparation method and supercapacitor |
| CN115340088A (en) * | 2022-07-27 | 2022-11-15 | 华南理工大学 | Temperature-independent linear magneto-resistor material and preparation method and application thereof |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103787315A (en) * | 2013-12-26 | 2014-05-14 | 中山大学 | Preparation method of graphene sheets |
| CN103787315B (en) * | 2013-12-26 | 2016-03-09 | 中山大学 | A kind of preparation method of graphene platelet |
| CN104231295A (en) * | 2014-09-10 | 2014-12-24 | 中国科学院金属研究所 | Preparation method of graphene prepreg |
| CN104401987A (en) * | 2014-11-26 | 2015-03-11 | 东华大学 | Preparation method of porous graphene flexible foam |
| CN104743551A (en) * | 2015-03-27 | 2015-07-01 | 上海应用技术学院 | Method for preparing reduced graphene oxide heat conductive film |
| CN108859300A (en) * | 2018-06-14 | 2018-11-23 | 沈阳航空航天大学 | A kind of high sensitivity graphene flexibility strain transducer and preparation method thereof |
| CN108910865A (en) * | 2018-07-21 | 2018-11-30 | 哈尔滨工业大学 | A method of preparing graphene/graphene nanobelt mixed film |
| CN110395716A (en) * | 2019-07-26 | 2019-11-01 | 中国电子科技集团公司第三十三研究所 | A kind of preparation method of the microwave defense material based on graphene |
| CN113555229A (en) * | 2020-04-26 | 2021-10-26 | 中天超容科技有限公司 | Graphene paper current collector, preparation method and supercapacitor |
| CN113555229B (en) * | 2020-04-26 | 2023-04-21 | 中天超容科技有限公司 | Graphene paper current collector, preparation method and supercapacitor |
| CN115340088A (en) * | 2022-07-27 | 2022-11-15 | 华南理工大学 | Temperature-independent linear magneto-resistor material and preparation method and application thereof |
| CN115340088B (en) * | 2022-07-27 | 2024-04-30 | 华南理工大学 | Temperature-independent linear magneto-resistance material and preparation method and application thereof |
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