WO2018107794A1 - Method for exfoliating hexagonal boron nitride (h-bn) by means of high speed dispersion - Google Patents

Method for exfoliating hexagonal boron nitride (h-bn) by means of high speed dispersion Download PDF

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WO2018107794A1
WO2018107794A1 PCT/CN2017/098055 CN2017098055W WO2018107794A1 WO 2018107794 A1 WO2018107794 A1 WO 2018107794A1 CN 2017098055 W CN2017098055 W CN 2017098055W WO 2018107794 A1 WO2018107794 A1 WO 2018107794A1
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white graphene
surfactant
stripping
stirring
acid
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段曦东
王剑
蒋后清
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广东纳路纳米科技有限公司
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    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B21/00—Nitrogen; Compounds thereof
    • C01B21/06—Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron
    • C01B21/064—Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron with boron
    • C01B21/0648—After-treatment, e.g. grinding, purification
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2204/00—Structure or properties of graphene
    • C01B2204/04—Specific amount of layers or specific thickness
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B2204/00—Structure or properties of graphene
    • C01B2204/20—Graphene characterized by its properties
    • C01B2204/32—Size or surface area
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/01—Particle morphology depicted by an image
    • C01P2004/03—Particle morphology depicted by an image obtained by SEM
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/01—Particle morphology depicted by an image
    • C01P2004/04—Particle morphology depicted by an image obtained by TEM, STEM, STM or AFM
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/20—Particle morphology extending in two dimensions, e.g. plate-like
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/12—Surface area

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  • the present invention relates to the field of nanomaterials, and in particular to a method for high speed dispersion stripping of white graphene.
  • white graphene is similar to that of graphene: its essence is a two-dimensional structure of single or hexagonal structure, and the sp2 hybridized B and N atoms form a covalent bond at 1:1, which is between the layers in the third dimension. Combined by Van der Waals forces.
  • h-BN Due to its low coefficient of friction, h-BN is widely used in the industry as a lubricant with excellent performance. And BN is also well known for its good mechanical properties and good thermal stability. Due to its special structure, the two-dimensional h-BN material has extremely high mechanical strength; the forbidden band width is wide, it is a good insulator, and has excellent chemical stability: it can exist stably in air above 1000 °C; High thermal conductivity: It is one of the materials with the highest thermal conductivity. It has broad application prospects in many fields such as photoelectron, magnetic energy, energy storage and catalysis.
  • h-BN two-dimensional materials have many excellent properties and broad application prospects, but it is not yet possible to prepare h-BN two-dimensional materials with complete structure and good performance on a large scale.
  • the traditional micro-mechanical peeling is to peel off h-BN by tape.
  • the prepared h-BN is structurally intact but the yield is too low, it is not suitable for industrial large-scale production; chemical liquid phase stripping is commonly used to toxic and harmful organic solvents, and oxidation And ion intercalation has a certain influence on its physical structure and electronic structure, and the prepared h-BN has poor electrical properties.
  • the chemical vapor deposition method can accurately control the number of h-BN layers, and the prepared h-BN has good quality, but its cost is high.
  • Step 1) mixing and dissolving white graphene (h-BN) powder, surfactant, and dispersion medium, stirring and stripping at a stirring speed of 5000-18000 rpm, and using ice water to reduce the temperature of the system during stirring, the total stirring time is 10- 240h;
  • the mass ratio of the white graphene (h-BN) powder to the surfactant is 1:50-10:1; the mass ratio of the white graphene (h-BN) to the dispersion medium is 1:100-1: 2000;
  • Step 2 After the completion of the grinding, the obtained powder is washed with alcohol, centrifuged, and then dried to obtain a white graphene dispersion after peeling.
  • liquid phase stripping has the best efficiency and quality when the surface energy of the dispersion medium is close to the surface energy of white graphene (25-40 mJ/m 2 ).
  • h-BN has a ⁇ bond, and B and N atoms have weak positive and negative points, respectively, this property makes it possible to adsorb a surfactant.
  • the sufficient adsorption of the surfactant on h-BN can form steric hindrance and charge steric hindrance, prevent the agglomerated isolated h-BN nanosheets from agglomerating and promote exfoliation.
  • the prepared white graphene dispersion can be divided for a long time. It is scattered in an aqueous solution such as alcohol or acetone, and does not cause agglomeration and sedimentation.
  • the dispersion medium is an aqueous solution of a low molecular weight alcohol and/or a ketone.
  • the dispersion medium has a surface tension of about 25-40 mJ/m 2 .
  • the aqueous solution of the low molecular weight alcohol and/or ketone is a low molecular weight alcohol and/or a ketone to water mass ratio of from 1:10 to 2:1, more preferably from 1:5 to 2:1.
  • the low molecular weight alcohol is at least one of methanol, ethanol, isopropanol, tert-butanol, ethylene glycol, and the like; and the low molecular weight ketone is acetone.
  • the surfactant is at least one of a surfactant having a long-chain Lewis acid or a long-chain Lewis base.
  • the surfactant is at least one of a higher fatty acid, a ketone, an aldehyde, etc. and a corresponding derivative thereof having a long-chain Lewis acid; or an olefin, an aromatic compound, an amine, an ether, etc. having a long-chain Lewis base; At least one of them.
  • the surfactant of the long-chain Lewis acid is: palmitic acid, palmitic acid, stearic acid, oleic acid, linoleic acid, palmitic acid, octadecanone, 3-methylcyclotridecane At least one of cyclotetradecanone, 3-hexadecanone, palm aldehyde, coconut aldehyde, eicosanal, and the like;
  • the surfactant of the long-chain Lewis base is: octadecylamine, oleylamine, terminal aminopolyethylene glycol, polyphenylacetylene, polythiophene, sodium polystyrene sulfonate, dodecylbenzene, 4-ten Dialkylaniline, polyoxyethylene octyl phenol ether, glycidyl 12-14 alkyl ether, hexaethylene glycol monohexadecyl ether, tetraethylene glycol monotetradecyl ether, hexaethylene glycol single fourteen At least one of ether and the like.
  • the white graphene dispersion prepared by the method of the invention has large particle size, thin thickness and large specific surface area: the thickness is less than 10 nm, and the thickness of the sheet can be as low as 1 nm, and the particle size is distributed in the range of hundreds of nanometers to several micrometers.
  • the specific surface area is as high as 100-1500 m 2 /g.
  • the invention has no strong acid and alkali, toxic and harmful additives, green environmental protection, high production efficiency, large output, simple equipment, low cost and good application prospect.
  • Example 1 is a SEM photograph of a white graphene dispersion prepared in Example 1;
  • Example 2 is an AFM photograph of a white graphene dispersion prepared in Example 1.
  • the specific preparation process steps of this embodiment weigh 0.2 g of white graphene (h-BN) in a beaker, add 150 g of ethanol and 150 g of deionized water, measure 4 g of cyclotetradecyl ketone, add to the beaker, stir to make it completely Dissolved.
  • h-BN white graphene
  • the above-mentioned solution was stirred at a high speed dispersing machine at 10,000 rpm for 72 hours, and the temperature of the system was lowered with ice water to prevent the temperature from rising due to high-speed stirring, and the dispersion medium was excessively lost.
  • the white graphene was washed with alcohol, centrifuged, and dried in a muffle furnace at 60 ° C to obtain a white graphene dispersion product.
  • FIG. 1 is a SEM photograph of the product prepared in the present example, from which it can be seen that the stripped white graphene nanosheet has a particle diameter of more than 250 nm and the nanosheet thickness is less than 10 nm by stirring and stripping;
  • FIG. 2 is an atomic force microscope photograph. Most of the sheet thickness in the figure is 2 nm, and part of the h-BN thickness can be as low as about 1 nm. The specific surface area was determined to be 470 m 2 /g.
  • the specific preparation process steps of this embodiment weigh 0.5 g of white graphene (h-BN), 200 g of ethanol and 200 g of deionized water in a beaker, and stir uniformly with a glass rod. 10 g of oleic acid was weighed, placed in a beaker, and stirred to completely dissolve.
  • h-BN white graphene
  • ethanol 200 g
  • deionized water 200 g
  • 10 g of oleic acid was weighed, placed in a beaker, and stirred to completely dissolve.
  • the above-mentioned solution was stirred at a high speed with a high speed disperser at 13,000 rpm for 48 hours, and the temperature of the system was lowered with ice water.
  • the white graphene was washed with alcohol, centrifuged, and dried in a muffle furnace at 60 ° C to obtain a white graphene dispersion product.
  • the size of the white graphene nanosheet after peeling is greater than 250 nm, and the thickness of the nanosheet is less than 10 nm; most of the thickness of the sheet is 3 nm, and the thickness of part of the h-BN can be as low as about 1 nm.
  • the specific preparation process steps of this embodiment weigh 0.2 g of white graphene (h-BN), 100 g of acetone and 100 g of deionized water in a beaker, and stir uniformly with a glass rod. 2 g of octadecylamine was weighed into a beaker and stirred to dissolve completely.
  • h-BN white graphene
  • acetone 100 g
  • deionized water 100 g
  • 2 octadecylamine was weighed into a beaker and stirred to dissolve completely.
  • the above-mentioned solution was stirred at a high speed with a high speed disperser at 13,000 rpm for 24 hours, and the temperature of the system was lowered with ice water.
  • the white graphene was washed with alcohol, centrifuged, and dried in a muffle furnace at 60 ° C to obtain a white graphene dispersion product.
  • the white graphene nanosheets after peeling have a particle size of more than 250 nm, and the thickness of the nanosheets is less than 10 nm; most of the sheet thickness is 5 nm, and the thickness of some of the h-BN can be as low as about 1 nm.
  • the specific surface area was determined to be 200 m 2 /g.
  • the above-mentioned solution was stirred at a high speed with a high speed disperser at 15,000 rpm for 15 h, and the temperature of the system was lowered with ice water.
  • the white graphene was washed with alcohol, centrifuged, and dried in a muffle furnace at 60 ° C to obtain a white graphene dispersion product.
  • the size of the white graphene nanosheet after peeling is greater than 250 nm, and the thickness of the nanosheet is less than 10 nm; most of the thickness of the sheet is 4 nm, and the thickness of part of the h-BN can be as low as about 1 nm.
  • the specific surface area was determined to be 230 m 2 /g.
  • 0.2 g of white graphene (h-BN), 100 g of acetone and 200 g of deionized water were weighed, and 4 g of 4-dodecylaniline was weighed, placed in a beaker, and stirred to completely dissolve.
  • the above-mentioned solution was stirred at a high speed with a high speed disperser at 18,000 rpm for 12 hours, and the temperature of the system was lowered with ice water.
  • the white graphene was washed with alcohol, centrifuged, and dried in a muffle furnace at 60 ° C to obtain a white graphene dispersion product.
  • the white graphene nanosheets after peeling have a particle size of more than 250 nm, and the thickness of the nanosheets is less than 10 nm; most of the sheet thickness is 5 nm, and the thickness of some of the h-BN can be as low as about 1 nm.
  • the specific surface area was determined to be 250 m 2 /g.
  • the specific preparation process steps of this embodiment weigh 0.2 g of white graphene (h-BN), 100 g of isopropanol and 50 g of deionized water, and measure 4 g of palmitic acid and 4 g of coconut aldehyde, put into a beaker, and stir to complete Dissolved.
  • h-BN white graphene
  • isopropanol 100 g
  • deionized water 100 g
  • palmitic acid and 4 g of coconut aldehyde measure 4 g of palmitic acid and 4 g of coconut aldehyde
  • the above-mentioned solution was stirred at a high speed dispersing machine at 10,000 rpm for 60 hours, and the temperature of the system was lowered with ice water.
  • the white graphene was washed with alcohol, centrifuged, and dried in a muffle furnace at 60 ° C to obtain a white graphene dispersion product.
  • the size of the white graphene nanosheet after peeling is greater than 250 nm, and the thickness of the nanosheet is less than 10 nm; most of the thickness of the sheet is 2 nm, and the thickness of part of the h-BN can be as low as about 1 nm.
  • the specific surface area was determined to be 480 m 2 /g.
  • the specific preparation process steps of this embodiment weigh 5g white graphene (h-BN), 1000 methanol, 500g acetone and 1500g deionized water, measure 1g hexaethylene glycol monohexadecyl ether, put it into a beaker, stir Make it completely soluble.
  • h-BN white graphene
  • 1000 methanol 1000 methanol
  • 500g acetone 500g acetone
  • 1500g deionized water measure 1g hexaethylene glycol monohexadecyl ether
  • the above-mentioned solution was stirred at a high speed of 8000 rpm for 160 h with a high speed disperser, and the temperature of the system was lowered with ice water.
  • the white graphene was washed with alcohol, centrifuged, and dried in a muffle furnace at 60 ° C to obtain a white graphene dispersion product.
  • the size of the white graphene nanosheet after peeling is greater than 250 nm, and the thickness of the nanosheet is less than 10 nm; most of the thickness of the sheet is 2 nm, and the thickness of part of the h-BN can be as low as about 1 nm.
  • the specific surface area was determined to be 740 m 2 /g.
  • the above-mentioned solution was stirred at a high speed dispersing machine at 6000 rpm for 220 h, and the temperature of the system was lowered with ice water.
  • the white graphene was washed with alcohol, centrifuged, and dried in a muffle furnace at 60 ° C to obtain a white graphene dispersion product.
  • the size of the white graphene nanosheet after peeling is greater than 250 nm, and the thickness of the nanosheet is less than 10 nm; most of the thickness of the sheet is 2 nm, and the thickness of part of the h-BN can be as low as about 1 nm.
  • the specific preparation process steps of this embodiment weigh 0.2 g of white graphene (h-BN) in a beaker, add 150 g of ethanol and 150 g of deionized water, measure 4 g of cyclotetradecyl ketone, add to the beaker, stir to make it completely Dissolved.
  • h-BN white graphene
  • the above-mentioned solution was stirred at a high speed with a high speed disperser at 10,000 rpm for 5 hours, and the temperature of the system was lowered with ice water. After the stirring and stripping, the white graphene was washed with alcohol, centrifuged, and dried in a muffle furnace at 60 ° C to obtain a white graphene dispersion product.
  • the size of the white graphene nanosheet after peeling is greater than 250 nm, the thickness of the nanosheet is mostly greater than 20 nm; the thickness of the partial sheet is 50 nm, and the thickness of part of the h-BN can be as low as about 5 nm.
  • the specific surface area was detected to be 60 m 2 /g.
  • the specific preparation process steps of this example weigh 0.2 g of white graphene (h-BN) in a beaker, add 150 g of ethanol and 150 g of deionized water without adding a surfactant.
  • h-BN white graphene
  • the above-mentioned solution was stirred at a high speed with a high speed disperser at 10,000 rpm for 80 hours, and the temperature of the system was lowered with ice water. After the stirring and stripping, the white graphene was washed with alcohol, centrifuged, and dried in a muffle furnace at 60 ° C to obtain a white graphene dispersion product.
  • the size of the white graphene nanosheet after peeling is greater than 250 nm, the thickness of the nanosheet is mostly greater than 20 nm; the thickness of the partial sheet is 50 nm, and the thickness of part of the h-BN can be as low as about 5 nm.
  • the specific surface area was determined to be 30 m 2 /g.

Abstract

A method for exfoliating hexagonal boron nitride (h-BN) by means of high speed dispersion, relating to the field of nanomaterials. The method comprises the specific steps of: mixing h-BN powder, a surfactant, and a dispersion medium for dissolving, and then stirring at a stirring speed of 5000-18000 rpm for exfoliating, ice water being used to reduce the system temperature during stirring, the total stirring time being 10-240 h, the mass ratio of the h-BN powder to the surfactant being 1:50 to 10:1, and the mass ratio of h-BN to the dispersion medium being 1:100 to 1:2000; after the stirring is completed, washing the resulting powder using an alcohol, performing centrifugation, and then drying to obtain an h-BN dispersion. The method can effectively exfoliate h-BN particles; the produced h-BN has the characteristics of uniform particles, a few layers, high specific surface area, and high purity, and can be well dispersed in an alcohol and other solvents and stored for tens of days without agglomeration and sedimentation.

Description

一种高速分散剥离白石墨烯的方法Method for high speed dispersion stripping of white graphene 技术领域Technical field
本发明涉及纳米材料领域，具体涉及一种高速分散剥离白石墨烯的方法。The present invention relates to the field of nanomaterials, and in particular to a method for high speed dispersion stripping of white graphene.
背景技术Background technique
石墨烯的发现引发了科学界对二维材料的研究热潮。二维材料具有高的比强度、良好的电学和热学性能、良好的透光性等，引发了科学界对其进行广泛的研究。过度金属硫化物、h-BN、硅烯、高岭石等一系列的二维材料被开发出来，这些产品具有优异的性能使得其在工业上的应用被人们赋予广泛的期待。h-BN作为一种新型的二维材料，同样具备优良的性能。The discovery of graphene has sparked a wave of research in the scientific community on two-dimensional materials. Two-dimensional materials have high specific strength, good electrical and thermal properties, good light transmission, etc., which has led to extensive research in the scientific community. A series of two-dimensional materials such as excessive metal sulfides, h-BN, silene, and kaolinite have been developed, and their excellent performance makes them widely expected in industrial applications. As a new two-dimensional material, h-BN also has excellent performance.
白石墨烯结构与石墨烯结构类似：其本质是单层或者六方结构的二维结构，sp2杂化的B、N原子按1:1形成共价结合，其在第三维方向上层与层之间通过范德华力结合。The structure of white graphene is similar to that of graphene: its essence is a two-dimensional structure of single or hexagonal structure, and the sp2 hybridized B and N atoms form a covalent bond at 1:1, which is between the layers in the third dimension. Combined by Van der Waals forces.
由于h-BN摩擦系数低，在工业上常作为一种性能优良的润滑剂而被广泛应用。并且BN也因力学性能良好以及热稳定性能好而被人们所熟知。二维h-BN材料由于其特殊的结构，具备极高的机械强度；禁带宽度宽，是一种良好的绝缘体，且具极好的化学稳定性：在1000℃以上空气中能够稳定存在；具高的热导率：是目前热导率最高的材料之一，在很多领域，如光电子、磁能、储能、催化等领域具有广阔的应用前景。Due to its low coefficient of friction, h-BN is widely used in the industry as a lubricant with excellent performance. And BN is also well known for its good mechanical properties and good thermal stability. Due to its special structure, the two-dimensional h-BN material has extremely high mechanical strength; the forbidden band width is wide, it is a good insulator, and has excellent chemical stability: it can exist stably in air above 1000 °C; High thermal conductivity: It is one of the materials with the highest thermal conductivity. It has broad application prospects in many fields such as photoelectron, magnetic energy, energy storage and catalysis.
h-BN二维材料具备诸多优良的性能及广泛的应用前景，但目前尚不能大规模制备具备结构完整、性能良好的h-BN二维材料。传统微机械剥离，是采用胶带将h-BN剥离，所制备的h-BN虽然结构完整但产量过低，不适宜工业大规模生产；化学液相剥离等常用到有毒有害的有机溶剂，且氧化及离子嵌入等对其物理结构及电子结构有一定影响，所制备得的h-BN电学性能不佳。化学气相沉积法能够准确控制h-BN层数，所制备的h-BN质量好，但其成本高昂。可见， 现有的白石墨烯制备方法，尚缺乏能兼顾石墨烯的质量和工业化生产的要求，这极大地限制了其应用。如何经济地生产性能优良白石墨烯也是目前其研究的重点之一，此外，由于白石墨烯存在巨大的比表面积而具备极高范德华力，导致白石墨烯片易产生不可逆的团聚，因此提高其分散性同样对其应用具有较大的意义。h-BN two-dimensional materials have many excellent properties and broad application prospects, but it is not yet possible to prepare h-BN two-dimensional materials with complete structure and good performance on a large scale. The traditional micro-mechanical peeling is to peel off h-BN by tape. Although the prepared h-BN is structurally intact but the yield is too low, it is not suitable for industrial large-scale production; chemical liquid phase stripping is commonly used to toxic and harmful organic solvents, and oxidation And ion intercalation has a certain influence on its physical structure and electronic structure, and the prepared h-BN has poor electrical properties. The chemical vapor deposition method can accurately control the number of h-BN layers, and the prepared h-BN has good quality, but its cost is high. Visible, The existing method for preparing white graphene has a lack of requirements for both the quality of graphene and industrial production, which greatly limits its application. How to economically produce high performance white graphene is also one of the research priorities. In addition, due to the large specific surface area of white graphene, it has extremely high van der Waals force, which leads to the irreversible agglomeration of white graphene sheets, so it is improved. Dispersibility also has great significance for its application.
发明内容Summary of the invention
有鉴于此，有必要针对上述的问题，提供一种高速分散剥离白石墨烯的方法，该方法能有效剥离白石墨烯颗粒，所制备得的白石墨烯具有颗粒均匀、层数少、比表面积大、纯度高的特点，能很好的分散在酒精等溶剂中，保存数十天不产生团聚沉降作用。且该方法操作过程简单，成本低，适合应用于工业生产。In view of the above, it is necessary to provide a method for separating and dispersing white graphene at a high speed in view of the above problems, which can effectively strip white graphene particles, and the prepared white graphene has uniform particles, few layers, and specific surface area. Large, high purity, can be well dispersed in alcohol and other solvents, stored for dozens of days without agglomeration and sedimentation. Moreover, the method has simple operation process and low cost, and is suitable for industrial production.
为实现上述目的，本发明采取以下的技术方案：In order to achieve the above object, the present invention adopts the following technical solutions:
本发明的高速分散剥离白石墨烯的方法，具体步骤为：The method for separating and dispersing white graphene at high speed according to the present invention, the specific steps are as follows:
步骤1)将白石墨烯(h-BN)粉末、表面活性剂、分散介质混合溶解后，采用搅拌速度为5000-18000rpm进行搅拌剥离，搅拌过程采用冰水降低体系温度，总搅拌时间为10-240h；Step 1) mixing and dissolving white graphene (h-BN) powder, surfactant, and dispersion medium, stirring and stripping at a stirring speed of 5000-18000 rpm, and using ice water to reduce the temperature of the system during stirring, the total stirring time is 10- 240h;
所述白石墨烯(h-BN)粉末与表面活性剂的质量比为1:50-10:1；所述白石墨烯(h-BN)与分散介质加入质量比为1:100-1:2000；The mass ratio of the white graphene (h-BN) powder to the surfactant is 1:50-10:1; the mass ratio of the white graphene (h-BN) to the dispersion medium is 1:100-1: 2000;
步骤2)研磨完成后，所得粉体采用酒精洗涤，离心分离，然后烘干干燥，得到剥离后的白石墨烯分散体。Step 2) After the completion of the grinding, the obtained powder is washed with alcohol, centrifuged, and then dried to obtain a white graphene dispersion after peeling.
根据液相剥离理论，分散介质的表面能接近白石墨烯的表面能(25-40mJ/m2)时，液相剥离具有最佳的效率和质量。According to the liquid phase stripping theory, liquid phase stripping has the best efficiency and quality when the surface energy of the dispersion medium is close to the surface energy of white graphene (25-40 mJ/m 2 ).
由于h-BN存在π键，且B、N原子分别带微弱正电、负点，此特性使其能够吸附表面活性剂。表面活性剂在h-BN上的充分吸附能形成空间位阻和电荷位阻，防止分离的h-BN纳米片团聚、促进剥离。Since h-BN has a π bond, and B and N atoms have weak positive and negative points, respectively, this property makes it possible to adsorb a surfactant. The sufficient adsorption of the surfactant on h-BN can form steric hindrance and charge steric hindrance, prevent the agglomerated isolated h-BN nanosheets from agglomerating and promote exfoliation.
本发明搅拌剥离足够长时间后，所制备得的白石墨烯分散体能长时间的分 散在酒精、丙酮等水溶液中，不产生团聚沉降等现象。After the stirring and stripping of the invention is long enough, the prepared white graphene dispersion can be divided for a long time. It is scattered in an aqueous solution such as alcohol or acetone, and does not cause agglomeration and sedimentation.
进一步的，所述分散介质为低分子量醇和/或酮的水溶液。Further, the dispersion medium is an aqueous solution of a low molecular weight alcohol and/or a ketone.
作为优选的，所述分散介质的表面张力约为25-40mJ/m2。Preferably, the dispersion medium has a surface tension of about 25-40 mJ/m 2 .
作为优选的，所述低分子量醇和/或酮的水溶液，为低分子量醇和/或酮与水的质量比为1:10-2:1，更优选1:5-2:1。Preferably, the aqueous solution of the low molecular weight alcohol and/or ketone is a low molecular weight alcohol and/or a ketone to water mass ratio of from 1:10 to 2:1, more preferably from 1:5 to 2:1.
作为优选的，所述低分子量醇为：甲醇、乙醇、异丙醇、叔丁醇、乙二醇等中的至少一种；所述低分子量酮为丙酮。Preferably, the low molecular weight alcohol is at least one of methanol, ethanol, isopropanol, tert-butanol, ethylene glycol, and the like; and the low molecular weight ketone is acetone.
进一步的，所述表面活性剂为具长链路易斯酸或长链路易斯碱的表面活性剂中的至少一种。Further, the surfactant is at least one of a surfactant having a long-chain Lewis acid or a long-chain Lewis base.
作为优选的，所述表面活性剂为具长链路易斯酸的高级脂肪酸、酮、醛等及其相应衍生物中的至少一种；或具长链路易斯碱的烯烃、芳香化合物、胺、醚等中的至少一种。Preferably, the surfactant is at least one of a higher fatty acid, a ketone, an aldehyde, etc. and a corresponding derivative thereof having a long-chain Lewis acid; or an olefin, an aromatic compound, an amine, an ether, etc. having a long-chain Lewis base; At least one of them.
作为进一步优选，所述长链路易斯酸的表面活性剂为：棕榈酸、软脂酸、硬脂酸、油酸、亚油酸、软脂酸、十八酮、3-甲基环十三酮、环十四烷酮，3-十六酮、棕榈醛、椰子醛、二十烷醛等中的至少一种；Further preferably, the surfactant of the long-chain Lewis acid is: palmitic acid, palmitic acid, stearic acid, oleic acid, linoleic acid, palmitic acid, octadecanone, 3-methylcyclotridecane At least one of cyclotetradecanone, 3-hexadecanone, palm aldehyde, coconut aldehyde, eicosanal, and the like;
所述长链路易斯碱的表面活性剂为：十八胺、油胺、端胺基聚乙二醇、聚苯乙炔、聚噻吩、聚苯乙烯磺酸钠、十二烷基苯、4-十二烷基苯胺、聚氧乙烯辛烷基苯酚醚、缩水甘油12-14烷基醚、六聚乙二醇单十六醚、四乙烯甘醇单十四醚、六聚乙二醇单十四醚等中的至少一种。The surfactant of the long-chain Lewis base is: octadecylamine, oleylamine, terminal aminopolyethylene glycol, polyphenylacetylene, polythiophene, sodium polystyrene sulfonate, dodecylbenzene, 4-ten Dialkylaniline, polyoxyethylene octyl phenol ether, glycidyl 12-14 alkyl ether, hexaethylene glycol monohexadecyl ether, tetraethylene glycol monotetradecyl ether, hexaethylene glycol single fourteen At least one of ether and the like.
本发明的有益效果为：The beneficial effects of the invention are:
本发明方法所制备的白石墨烯分散体粒径大、厚度薄、比表面积大：厚度均小于10nm，并且薄片的厚度可低至1个纳米，粒径尺寸分布在数百纳米至数微米，比表面积高达100-1500m2/g。The white graphene dispersion prepared by the method of the invention has large particle size, thin thickness and large specific surface area: the thickness is less than 10 nm, and the thickness of the sheet can be as low as 1 nm, and the particle size is distributed in the range of hundreds of nanometers to several micrometers. The specific surface area is as high as 100-1500 m 2 /g.
本发明制备过程中无强酸碱、有毒有害添加剂等，绿色环保，生产效率高、产量大，且设备简单、成本低廉，具有良好的应用前景。The invention has no strong acid and alkali, toxic and harmful additives, green environmental protection, high production efficiency, large output, simple equipment, low cost and good application prospect.
附图说明 DRAWINGS
图1为实施例1所制备得的白石墨烯分散体的SEM照片；1 is a SEM photograph of a white graphene dispersion prepared in Example 1;
图2为实施例1所制备得的白石墨烯分散体的AFM照片。2 is an AFM photograph of a white graphene dispersion prepared in Example 1.
具体实施方式detailed description
为使本发明的目的、技术方案和优点更加清楚，下面将结合本发明实施例，对本发明的技术方案作进一步清楚、完整地描述。需要说明的是，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。In order to make the objects, the technical solutions and the advantages of the present invention more clearly, the technical solutions of the present invention will be further clearly and completely described below in conjunction with the embodiments of the present invention. It should be noted that the described embodiments are only a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.
实施例1Example 1
本实施例具体制备工艺步骤：称量0.2g白石墨烯(h-BN)于烧杯中、加入150g乙醇和150g去离子水，量取4g环十四烷酮，加入烧杯中，搅拌使之完全溶解。The specific preparation process steps of this embodiment: weigh 0.2 g of white graphene (h-BN) in a beaker, add 150 g of ethanol and 150 g of deionized water, measure 4 g of cyclotetradecyl ketone, add to the beaker, stir to make it completely Dissolved.
将上述所配溶液用高速分散机以10000rpm高速搅拌72h，并以冰水降低体系温度，以防止高速搅拌导致温度升高，分散介质损失过快。The above-mentioned solution was stirred at a high speed dispersing machine at 10,000 rpm for 72 hours, and the temperature of the system was lowered with ice water to prevent the temperature from rising due to high-speed stirring, and the dispersion medium was excessively lost.
搅拌剥离完毕后将白石墨烯经过酒精洗涤后离心分离，在马弗炉中60℃烘干处理得到白石墨烯分散体产品。After the stirring and stripping, the white graphene was washed with alcohol, centrifuged, and dried in a muffle furnace at 60 ° C to obtain a white graphene dispersion product.
图1为本实施例所制得产品的SEM照片，从中可以看出通过搅拌剥离，剥离后的白石墨烯纳米片粒径大于250nm，纳米片厚度均低于10nm；图2为原子力显微镜检测照片，图中大部分薄片厚度为2nm，部分h-BN厚度可低至1nm左右。通过检测比表面积为470m2/g。1 is a SEM photograph of the product prepared in the present example, from which it can be seen that the stripped white graphene nanosheet has a particle diameter of more than 250 nm and the nanosheet thickness is less than 10 nm by stirring and stripping; FIG. 2 is an atomic force microscope photograph. Most of the sheet thickness in the figure is 2 nm, and part of the h-BN thickness can be as low as about 1 nm. The specific surface area was determined to be 470 m 2 /g.
实施例2Example 2
本实施例具体制备工艺步骤：称量0.5g白石墨烯(h-BN)、200g乙醇和200g去离子水于烧杯中，用玻璃棒搅拌均匀。量取10g油酸，放入烧杯中，搅拌使其完全溶解。The specific preparation process steps of this embodiment: weigh 0.5 g of white graphene (h-BN), 200 g of ethanol and 200 g of deionized water in a beaker, and stir uniformly with a glass rod. 10 g of oleic acid was weighed, placed in a beaker, and stirred to completely dissolve.
将上述所配溶液用高速分散机以13000rpm高速搅拌48h，并以冰水降低体系温度。 The above-mentioned solution was stirred at a high speed with a high speed disperser at 13,000 rpm for 48 hours, and the temperature of the system was lowered with ice water.
搅拌剥离完毕后将白石墨烯经过酒精洗涤后离心分离，在马弗炉中60℃烘干处理得到白石墨烯分散体产品。After the stirring and stripping, the white graphene was washed with alcohol, centrifuged, and dried in a muffle furnace at 60 ° C to obtain a white graphene dispersion product.
剥离后的白石墨烯纳米片粒径大于250nm，纳米片厚度均低于10nm；大部分薄片厚度为3nm，部分h-BN厚度可低至1nm左右。通过检测比表面积为350m2/g。The size of the white graphene nanosheet after peeling is greater than 250 nm, and the thickness of the nanosheet is less than 10 nm; most of the thickness of the sheet is 3 nm, and the thickness of part of the h-BN can be as low as about 1 nm. By detecting the specific surface area of 350 m 2 /g.
实施例3Example 3
本实施例具体制备工艺步骤：称量0.2g白石墨烯(h-BN)、100g丙酮和100g去离子水于烧杯中，用玻璃棒搅拌均匀。量取2g十八胺于烧杯中，同样搅拌使其完全溶解。The specific preparation process steps of this embodiment: weigh 0.2 g of white graphene (h-BN), 100 g of acetone and 100 g of deionized water in a beaker, and stir uniformly with a glass rod. 2 g of octadecylamine was weighed into a beaker and stirred to dissolve completely.
将上述所配溶液用高速分散机以13000rpm高速搅拌24h，并以冰水降低体系温度。The above-mentioned solution was stirred at a high speed with a high speed disperser at 13,000 rpm for 24 hours, and the temperature of the system was lowered with ice water.
搅拌剥离完毕后将白石墨烯经过酒精洗涤后离心分离，在马弗炉中60℃烘干处理得到白石墨烯分散体产品。After the stirring and stripping, the white graphene was washed with alcohol, centrifuged, and dried in a muffle furnace at 60 ° C to obtain a white graphene dispersion product.
剥离后的白石墨烯纳米片粒径大于250nm，纳米片厚度均低于10nm；大部分薄片厚度为5nm，部分h-BN厚度可低至1nm左右。通过检测比表面积为200m2/g。The white graphene nanosheets after peeling have a particle size of more than 250 nm, and the thickness of the nanosheets is less than 10 nm; most of the sheet thickness is 5 nm, and the thickness of some of the h-BN can be as low as about 1 nm. The specific surface area was determined to be 200 m 2 /g.
实施例4Example 4
本实施例具体制备工艺步骤：称量0.5g白石墨烯(h-BN)、150g丙酮和150g去离子水，量取4g环十四烷酮，加入烧杯中，搅拌使其完全溶解。The specific preparation process steps of this example: weigh 0.5 g of white graphene (h-BN), 150 g of acetone and 150 g of deionized water, measure 4 g of cyclotetradecyl ketone, add to the beaker, and stir to completely dissolve.
将上述所配溶液用高速分散机以15000rpm高速搅拌15h，并以冰水降低体系温度。The above-mentioned solution was stirred at a high speed with a high speed disperser at 15,000 rpm for 15 h, and the temperature of the system was lowered with ice water.
搅拌剥离完毕后将白石墨烯经过酒精洗涤后离心分离，在马弗炉中60℃烘干处理得到白石墨烯分散体产品。After the stirring and stripping, the white graphene was washed with alcohol, centrifuged, and dried in a muffle furnace at 60 ° C to obtain a white graphene dispersion product.
剥离后的白石墨烯纳米片粒径大于250nm，纳米片厚度均低于10nm；大部分薄片厚度为4nm，部分h-BN厚度可低至1nm左右。通过检测比表面积为230m2/g。 The size of the white graphene nanosheet after peeling is greater than 250 nm, and the thickness of the nanosheet is less than 10 nm; most of the thickness of the sheet is 4 nm, and the thickness of part of the h-BN can be as low as about 1 nm. The specific surface area was determined to be 230 m 2 /g.
实施例5Example 5
本实施例具体制备工艺步骤：称量0.2g白石墨烯(h-BN)、100g丙酮和200g去离子水，量取4g4-十二烷基苯胺，放入烧杯中，搅拌使之完全溶解。In the specific preparation process of the present embodiment, 0.2 g of white graphene (h-BN), 100 g of acetone and 200 g of deionized water were weighed, and 4 g of 4-dodecylaniline was weighed, placed in a beaker, and stirred to completely dissolve.
将上述所配溶液用高速分散机以18000rpm高速搅拌12h，并以冰水降低体系温度。The above-mentioned solution was stirred at a high speed with a high speed disperser at 18,000 rpm for 12 hours, and the temperature of the system was lowered with ice water.
搅拌剥离完毕后将白石墨烯经过酒精洗涤后离心分离，在马弗炉中60℃烘干处理得到白石墨烯分散体产品。After the stirring and stripping, the white graphene was washed with alcohol, centrifuged, and dried in a muffle furnace at 60 ° C to obtain a white graphene dispersion product.
剥离后的白石墨烯纳米片粒径大于250nm，纳米片厚度均低于10nm；大部分薄片厚度为5nm，部分h-BN厚度可低至1nm左右。通过检测比表面积为250m2/g。The white graphene nanosheets after peeling have a particle size of more than 250 nm, and the thickness of the nanosheets is less than 10 nm; most of the sheet thickness is 5 nm, and the thickness of some of the h-BN can be as low as about 1 nm. The specific surface area was determined to be 250 m 2 /g.
实施例6Example 6
本实施例具体制备工艺步骤：称量0.2g白石墨烯(h-BN)、100g异丙醇和50g去离子水，量取4g软脂酸、4g椰子醛，放入烧杯中，搅拌使之完全溶解。The specific preparation process steps of this embodiment: weigh 0.2 g of white graphene (h-BN), 100 g of isopropanol and 50 g of deionized water, and measure 4 g of palmitic acid and 4 g of coconut aldehyde, put into a beaker, and stir to complete Dissolved.
将上述所配溶液用高速分散机以10000rpm高速搅拌60h，并以冰水降低体系温度。The above-mentioned solution was stirred at a high speed dispersing machine at 10,000 rpm for 60 hours, and the temperature of the system was lowered with ice water.
搅拌剥离完毕后将白石墨烯经过酒精洗涤后离心分离，在马弗炉中60℃烘干处理得到白石墨烯分散体产品。After the stirring and stripping, the white graphene was washed with alcohol, centrifuged, and dried in a muffle furnace at 60 ° C to obtain a white graphene dispersion product.
剥离后的白石墨烯纳米片粒径大于250nm，纳米片厚度均低于10nm；大部分薄片厚度为2nm，部分h-BN厚度可低至1nm左右。通过检测比表面积为480m2/g。The size of the white graphene nanosheet after peeling is greater than 250 nm, and the thickness of the nanosheet is less than 10 nm; most of the thickness of the sheet is 2 nm, and the thickness of part of the h-BN can be as low as about 1 nm. The specific surface area was determined to be 480 m 2 /g.
实施例7Example 7
本实施例具体制备工艺步骤：称量5g白石墨烯(h-BN)、1000甲醇、500g丙酮和1500g去离子水，量取1g六聚乙二醇单十六醚，放入烧杯中，搅拌使之完全溶解。The specific preparation process steps of this embodiment: weigh 5g white graphene (h-BN), 1000 methanol, 500g acetone and 1500g deionized water, measure 1g hexaethylene glycol monohexadecyl ether, put it into a beaker, stir Make it completely soluble.
将上述所配溶液用高速分散机以8000rpm高速搅拌160h，并以冰水降低体系温度。 The above-mentioned solution was stirred at a high speed of 8000 rpm for 160 h with a high speed disperser, and the temperature of the system was lowered with ice water.
搅拌剥离完毕后将白石墨烯经过酒精洗涤后离心分离，在马弗炉中60℃烘干处理得到白石墨烯分散体产品。After the stirring and stripping, the white graphene was washed with alcohol, centrifuged, and dried in a muffle furnace at 60 ° C to obtain a white graphene dispersion product.
剥离后的白石墨烯纳米片粒径大于250nm，纳米片厚度均低于10nm；大部分薄片厚度为2nm，部分h-BN厚度可低至1nm左右。通过检测比表面积为740m2/g。The size of the white graphene nanosheet after peeling is greater than 250 nm, and the thickness of the nanosheet is less than 10 nm; most of the thickness of the sheet is 2 nm, and the thickness of part of the h-BN can be as low as about 1 nm. The specific surface area was determined to be 740 m 2 /g.
实施例8Example 8
本实施例具体制备工艺步骤：称量5g白石墨烯(h-BN)、2000乙醇、500g叔丁醇和2000g去离子水，量取1g油胺、1g缩水甘油12-14烷基醚，放入烧杯中，搅拌使之完全溶解。The specific preparation process steps of this embodiment: weighing 5 g of white graphene (h-BN), 2000 ethanol, 500 g of t-butanol and 2000 g of deionized water, and measuring 1 g of oleylamine, 1 g of glycidyl 12-14 alkyl ether, and placing Stir in the beaker to dissolve completely.
将上述所配溶液用高速分散机以6000rpm高速搅拌220h，并以冰水降低体系温度。The above-mentioned solution was stirred at a high speed dispersing machine at 6000 rpm for 220 h, and the temperature of the system was lowered with ice water.
搅拌剥离完毕后将白石墨烯经过酒精洗涤后离心分离，在马弗炉中60℃烘干处理得到白石墨烯分散体产品。After the stirring and stripping, the white graphene was washed with alcohol, centrifuged, and dried in a muffle furnace at 60 ° C to obtain a white graphene dispersion product.
剥离后的白石墨烯纳米片粒径大于250nm，纳米片厚度均低于10nm；大部分薄片厚度为2nm，部分h-BN厚度可低至1nm左右。通过检测比表面积为600m2/g。The size of the white graphene nanosheet after peeling is greater than 250 nm, and the thickness of the nanosheet is less than 10 nm; most of the thickness of the sheet is 2 nm, and the thickness of part of the h-BN can be as low as about 1 nm. By detecting the specific surface area of 600 m 2 /g.
对比例1Comparative example 1
本实施例具体制备工艺步骤：称量0.2g白石墨烯(h-BN)于烧杯中、加入150g乙醇和150g去离子水，量取4g环十四烷酮，加入烧杯中，搅拌使之完全溶解。The specific preparation process steps of this embodiment: weigh 0.2 g of white graphene (h-BN) in a beaker, add 150 g of ethanol and 150 g of deionized water, measure 4 g of cyclotetradecyl ketone, add to the beaker, stir to make it completely Dissolved.
将上述所配溶液用高速分散机以10000rpm高速搅拌5h，并以冰水降低体系温度。搅拌剥离完毕后将白石墨烯经过酒精洗涤后离心分离，在马弗炉中60℃烘干处理得到白石墨烯分散体产品。The above-mentioned solution was stirred at a high speed with a high speed disperser at 10,000 rpm for 5 hours, and the temperature of the system was lowered with ice water. After the stirring and stripping, the white graphene was washed with alcohol, centrifuged, and dried in a muffle furnace at 60 ° C to obtain a white graphene dispersion product.
剥离后的白石墨烯纳米片粒径大于250nm，纳米片厚度大部分大于20nm；部分薄片厚度为50nm，部分h-BN厚度可低至5nm左右。通过检测比表面积为60m2/g。 The size of the white graphene nanosheet after peeling is greater than 250 nm, the thickness of the nanosheet is mostly greater than 20 nm; the thickness of the partial sheet is 50 nm, and the thickness of part of the h-BN can be as low as about 5 nm. The specific surface area was detected to be 60 m 2 /g.
对比例2Comparative example 2
本实施例具体制备工艺步骤：称量0.2g白石墨烯(h-BN)于烧杯中、加入150g乙醇和150g去离子水，不加表面活性剂。The specific preparation process steps of this example: weigh 0.2 g of white graphene (h-BN) in a beaker, add 150 g of ethanol and 150 g of deionized water without adding a surfactant.
将上述所配溶液用高速分散机以10000rpm高速搅拌80h，并以冰水降低体系温度。搅拌剥离完毕后将白石墨烯经过酒精洗涤后离心分离，在马弗炉中60℃烘干处理得到白石墨烯分散体产品。The above-mentioned solution was stirred at a high speed with a high speed disperser at 10,000 rpm for 80 hours, and the temperature of the system was lowered with ice water. After the stirring and stripping, the white graphene was washed with alcohol, centrifuged, and dried in a muffle furnace at 60 ° C to obtain a white graphene dispersion product.
剥离后的白石墨烯纳米片粒径大于250nm，纳米片厚度大部分大于20nm；部分薄片厚度为50nm，部分h-BN厚度可低至5nm左右。通过检测比表面积为30m2/g。The size of the white graphene nanosheet after peeling is greater than 250 nm, the thickness of the nanosheet is mostly greater than 20 nm; the thickness of the partial sheet is 50 nm, and the thickness of part of the h-BN can be as low as about 5 nm. The specific surface area was determined to be 30 m 2 /g.
以上所述实施例仅表达了本发明的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对本发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。 The above-mentioned embodiments are merely illustrative of several embodiments of the present invention, and the description thereof is more specific and detailed, but is not to be construed as limiting the scope of the invention. It should be noted that a number of variations and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of the invention should be determined by the appended claims.

Claims (7)

  1. 一种高速分散剥离白石墨烯的方法，其特征在于，具体步骤为：A method for high speed dispersion stripping of white graphene, characterized in that the specific steps are:
    步骤1)将白石墨烯粉末、表面活性剂、分散介质混合溶解后，采用搅拌速度为5000-18000rpm下进行搅拌剥离，搅拌过程采用冰水降低体系温度，总搅拌时间为10-240h；Step 1) mixing and dissolving the white graphene powder, the surfactant, and the dispersion medium, stirring and stripping at a stirring speed of 5000-18000 rpm, and using the ice water to reduce the temperature of the system during the stirring process, the total stirring time is 10-240 h;
    所述白石墨烯粉末与表面活性剂的质量比为1:50-10:1；所述白石墨烯与分散介质加入质量比为1:100-1:2000；The mass ratio of the white graphene powder to the surfactant is 1:50-10:1; the mass ratio of the white graphene to the dispersion medium is 1:100-1:2000;
    步骤2)研磨完成后，所得粉体采用酒精洗涤，离心分离，然后烘干干燥，得到白石墨烯分散体。Step 2) After the completion of the grinding, the obtained powder is washed with alcohol, centrifuged, and then dried to obtain a white graphene dispersion.
  2. 根据权利要求1所述的高速分散剥离白石墨烯的方法，其特征在于，所述分散介质为低分子量醇和/或酮的水溶液。The method of rapidly dispersing and stripping white graphene according to claim 1, wherein the dispersion medium is an aqueous solution of a low molecular weight alcohol and/or a ketone.
  3. 根据权利要求2所述的高速分散剥离白石墨烯的方法，其特征在于，所述低分子量醇和/或酮的水溶液，为低分子量醇和/或酮与水的质量比为1:10-2:1。The method for rapidly dispersing and stripping white graphene according to claim 2, wherein the aqueous solution of the low molecular weight alcohol and/or ketone is a low molecular weight alcohol and/or a ketone to water mass ratio of 1:10-2: 1.
  4. 根据权利要求2所述的高速分散剥离白石墨烯的方法，其特征在于，所述低分子量醇为：甲醇、乙醇、异丙醇、叔丁醇、乙二醇等中的至少一种；所述低分子量酮为丙酮。The method of rapidly dispersing and stripping white graphene according to claim 2, wherein the low molecular weight alcohol is at least one of methanol, ethanol, isopropanol, tert-butanol, ethylene glycol, and the like; The low molecular weight ketone is acetone.
  5. 根据权利要求1所述的高速分散剥离白石墨烯的方法，其特征在于，所述表面活性剂为具长链路易斯酸或长链路易斯碱的表面活性剂中的至少一种。The method of rapidly dispersing and stripping white graphene according to claim 1, wherein the surfactant is at least one of a surfactant having a long-chain Lewis acid or a long-chain Lewis base.
  6. 根据权利要求4所述的高速分散剥离白石墨烯的方法，其特征在于，所述表面活性剂为具长链路易斯酸的高级脂肪酸、酮、醛及其相应衍生物中的至少一种；或具长链路易斯碱的烯烃、芳香化合物、胺、醚中的至少一种。The method of rapidly dispersing and stripping white graphene according to claim 4, wherein the surfactant is at least one of a higher fatty acid having a long-chain Lewis acid, a ketone, an aldehyde, and a corresponding derivative thereof; At least one of an olefin, an aromatic compound, an amine, and an ether having a long-chain Lewis base.
  7. 根据权利要求5所述的高速分散剥离白石墨烯的方法，其特征在于，所述长链路易斯酸的表面活性剂为：棕榈酸、软脂酸、硬脂酸、油酸、亚油酸、软脂酸、十八酮、3-甲基环十三酮、环十四烷酮，3-十六酮、棕榈醛、椰子醛、二十烷醛中的至少一种； The method for rapidly dispersing and stripping white graphene according to claim 5, wherein the surfactant of the long-chain Lewis acid is: palmitic acid, palmitic acid, stearic acid, oleic acid, linoleic acid, At least one of palmitic acid, octadecanone, 3-methylcyclotridecanoate, cyclotetradecanone, 3-hexadecanone, palm aldehyde, cocoaldehyde, and eicosanal;
    所述长链路易斯碱的表面活性剂为：十八胺、油胺、端胺基聚乙二醇、聚苯乙炔、聚噻吩、聚苯乙烯磺酸钠、十二烷基苯、4-十二烷基苯胺、聚氧乙烯辛烷基苯酚醚、缩水甘油12-14烷基醚、六聚乙二醇单十六醚、四乙烯甘醇单十四醚、六聚乙二醇单十四醚中的至少一种。 The surfactant of the long-chain Lewis base is: octadecylamine, oleylamine, terminal aminopolyethylene glycol, polyphenylacetylene, polythiophene, sodium polystyrene sulfonate, dodecylbenzene, 4-ten Dialkylaniline, polyoxyethylene octyl phenol ether, glycidyl 12-14 alkyl ether, hexaethylene glycol monohexadecyl ether, tetraethylene glycol monotetradecyl ether, hexaethylene glycol single fourteen At least one of ethers.
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