CN104495828A - Method for preparing graphene through liquid-phase stripping method - Google Patents
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Abstract
The invention discloses a method for preparing graphene through a liquid-phase stripping method. The preparation method comprises the following steps: S1, performing expanding treatment on a graphite raw material through an expanding method; S2, dispersing the expanded graphite into an aqueous solution containing a surfactant to obtain a mixture, performing ultrasonic treatment on the mixture, centrifuging the mixture, and drying the mixture for later use; S3, adding the dried graphite into an organic solvent, a mixed solution of an organic solvent and a surfactant or a mixed solution of an organic solvent and substances with surface energy similar to that of the graphene, performing ultrasonic treatment and suction filtration, drying, and repeating the step S3 for 1-10 times, thereby obtaining graphene. Compared with the prior art, the method disclosed by the invention can be used for greatly shortening the ultrasonic treatment time, improving the stripping efficiency and obtaining high-quality graphene under low-power ultrasonic treatment.
Description
Technical field
The present invention relates to a kind of method that liquid phase stripping method prepares Graphene, belong to technical field of graphene preparation.
Background technology
Graphene is a kind of novel material of the individual layer sheet structure be made up of carbon atom, it is known nano material thin, the hardest in the world, its thermal conductivity is high, resistivity is extremely low, electron transfer rate is exceedingly fast, and these excellent properties make Graphene have bright application prospect in fields such as nano electron device, gas sensor, stored energy and matrix materials.
Find after deliberation, the method preparing Graphene has a lot, and such as micromechanics stripping, chemical vapour deposition, oxidation-reduction method and liquid phase or the direct stripping method of gas phase etc., wherein liquid phase stripping method is widely used in recent years.
But, prepare Graphene also existing defects by existing liquid phase stripping method, specific as follows:
(1) ultrasonic time is long.General from 24 hours to 20 days, just can reach desirable peeling effect, i.e. higher yields and the less number of plies, because the ultrasonic of short period of time can only obtain lower productive rate.And record in document and be less than 24 hours, mainly because its final product is the part in supernatant liquor, by centrifugal taking-up supernatant liquor, then filter and obtain Graphene, the output of Graphene is very low.
(2) two-dimensional of the Graphene be stripped out is smaller, and size distribution ranges is wide, and Graphene is of low quality.
Summary of the invention
The object of the invention is to, provide a kind of liquid phase stripping method to prepare the method for Graphene, greatly can shorten ultrasonic time, improve charge stripping efficiency, and under low power ultrasound, obtain the Graphene of high-quality.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: a kind of liquid phase stripping method prepares the method for Graphene, comprises the following steps:
S1, utilizes plavini to carry out expansion process to graphite raw material;
S2, by the graphite dispersion after expansion containing in the aqueous solution of tensio-active agent, carries out supersound process, more centrifugal, dry, for subsequent use;
S3, dried graphite is joined the mixed solution of organic solvent, organic solvent and tensio-active agent or organic solvent and with Graphene have similarity surface can material mixed solution in, carry out supersound process, then suction filtration, drying, repeating step S31 ~ 10 time, obtain Graphene.
Aforesaid liquid phase stripping method is prepared in the method for Graphene, and described graphite raw material is one or more in natural graphite, expansible black lead and expanded graphite.
Aforesaid liquid phase stripping method is prepared in the method for Graphene, and the plavini in described step S1 is instantaneous high-temperature plavini, and it is specially: by graphite raw material 500 ~ 1800 DEG C of heating 5 seconds ~ 1 minute.
Preferably, instantaneous high-temperature plavini is specially: by graphite raw material 900 DEG C of heating 10 seconds.Instantaneous high-temperature plavini can not bring the defect of other groups into, also can repeatedly expand preferably simultaneously.
Aforesaid liquid phase stripping method is prepared in the method for Graphene, plavini in described step S1 is chemically expansible method, be specially: easily generate the compound of gas by graphite raw material and halogenide or containing the little ion of radius, grinding makes it to mix, then the vitriol oil is added, 50 ~ 100 DEG C are incubated 10 minutes ~ 24 hours, are finally washed till neutrality with pure water, dry for standby.
Preferably, chemically expansible method is specially: be easy to get and cheap muriate (as sodium-chlor) or the compound containing ammonium radical ion with relative by graphite raw material, grinding makes it to mix, then the vitriol oil is added, 60 DEG C are incubated 24 hours, finally be washed till neutrality with pure water, dry for standby.
Natural graphite, expansible black lead and expanded graphite are all suitable for aforementioned two kinds of plavinis, and after overexpansion, volume is original about 300 times.
Aforesaid liquid phase stripping method is prepared in the method for Graphene, described step S2 is specially: contain in the aqueous solution of tensio-active agent by the graphite dispersion after expanding at 0.01 ~ 50mg/mL, in dispersion liquid, the concentration of graphite is 0.01 ~ 10mg/mL, carry out supersound process, ultrasonic power is 50W ~ 50KW, ultrasonic time is 30 minutes ~ 4 hours, makes its preliminary refinement; Centrifugation again, rotating speed 1000 ~ 6000rpm, vacuum drying oven drying 5 ~ 12 hours, for subsequent use; Wherein, described tensio-active agent is Sodium cholic acid, sodium lauryl sulphate, Sodium dodecylbenzene sulfonate, cetyl trimethylammonium bromide, Triton X-100, polyoxyethylene stearic acid ester, tween or polyvinylpyrrolidone.
Aforesaid liquid phase stripping method is prepared in the method for Graphene, described step S2 is specially: contain in the aqueous solution of Sodium cholic acid by the graphite dispersion after expanding at 0.1mg/mL, in dispersion liquid, the concentration of graphite is 0.01 ~ 10mg/mL (optimal concentration is 0.1mg/mL), carry out supersound process, ultrasonic power is 250W, ultrasonic time is 4 hours, makes its preliminary refinement; Centrifugation again, rotating speed 1500rpm, dry 12 hours of vacuum drying oven, for subsequent use.
Aforesaid liquid phase stripping method is prepared in the method for Graphene, in described step S3, the mixed solution of adjacent twice organic solvent used, organic solvent and tensio-active agent or organic solvent and with Graphene have similarity surface can the mixed solution of material be not identical.
Aforesaid liquid phase stripping method is prepared in the method for Graphene, described step S3 is specially: dried graphite joined mixed solution or the organic solvent of organic solvent, organic solvent and tensio-active agent and have in the mixed solution of the material of similarity surface energy with Graphene, the concentration of described mixed solution is 0 ~ 5mmol/mL, be configured to the dispersion liquid that graphite concentration is 0.01 ~ 10mg/mL, carry out supersound process, ultrasonic power is 50W ~ 50KW, and ultrasonic time is 30 minutes ~ 18 hours; Then suction filtration, vacuum drying oven drying 5 ~ 12 hours; Wherein, described tensio-active agent is stearic acid, Sodium cholic acid, sodium lauryl sulphate, Sodium dodecylbenzene sulfonate, cetyl trimethylammonium bromide, Triton X-100, polyoxyethylene stearic acid ester, tween, polyvinylpyrrolidone or polyethylene oxide-poly(propylene oxide)-polyethylene oxide triblock copolymer (P123); Described have with Graphene similarity surface can material be 9-anthroic acid and derivative, 7 thereof, 7,8,8-four cyano para benzoquinone bismethane, naphthylacetic acid and derivative (as naphthalene methyl acetate) thereof, Whitfield's ointment and derivative, phenylformic acid and derivative thereof, phthalocyanine and derivative (as CuPc) thereof; Described organic solvent is alkane ketone (as N-Methyl pyrrolidone), amides (as DMF), ethers (as methyl ethyl ether), ester class (as ethyl acetate, methyl phenylacetate etc.), ramification of benzene (as toluene, chlorobenzene etc.), fused ring compound and derivative (as anthracene, acene) thereof or small molecule solvent (as tetrahydrofuran (THF), dimethyl sulfoxide (DMSO) etc.).
Aforesaid liquid phase stripping method is prepared in the method for Graphene, described step S3 is specially: dried graphite is joined 6mg/mL and contain in stearic N-Methyl pyrrolidone solution, be configured to the dispersion liquid that graphite concentration is 0.1mg/mL, carry out supersound process, ultrasonic power is 250W, and ultrasonic time is 6 hours; Suction filtration, dry 12 hours of 120 DEG C of vacuum drying ovens.
Aforesaid liquid phase stripping method is prepared in the method for Graphene, described step S3 is specially: dried graphite is joined 5mg/mL and contain in the methyl phenylacetate solution of naphthalene methyl acetate, be configured to the dispersion liquid that graphite concentration is 0.1mg/mL, carry out supersound process, ultrasonic power is 250W, and ultrasonic time is 4 hours; Suction filtration, dry 12 hours of 120 DEG C of vacuum drying ovens.
Compared with prior art, the present invention has the following advantages:
(1) increase the pre-treatment of graphite raw material, improve the interlamellar spacing of expanded graphite, be more conducive to peeling off.
(2) adopt interpolation tensio-active agent or have increase peeling effect, the material such as with Graphene with similarity surface energy coordinates to make solute with solvent, and up-stripping, can improve ultrasonic peeling effect, reduce ultrasonic time, make the multi-layer graphene of stripping thinner.
(3) method taking multistep to peel off reduces the time of ultrasonic stripping as far as possible, improves the efficiency of ultrasonic stripping; In ultrasonic stripping process, the surface energy of product and hansen solubility are dynamic changes, the stripper that first time selects may be optimum when starting, but further stripping can be hindered on the contrary to during stripping below, therefore substep repeatedly peels off the stripper that can add optimum (such as mating with surface tension) at suitable stage, again in conjunction with suitable graphite concentration, improve ultrasonic efficiency, reduce ultrasonic time.
(4) because whole preparation process does not have redox reaction, do not introduce impurity, defect concentrates on edge, and centre does not have, and the Graphene quality therefore generated is high.
(5) product obtained after ultrasonic end is all available, not only gets supernatant liquor, therefore does not need centrifugally operated, and simplify step, direct suction filtration can obtain Graphene, saves preparation time.
The present invention is by optimizing the pre-treatment of graphite raw material, and cooperatively interacting by solute and solvent, namely select optimum stripper, greatly can shorten ultrasonic time, improve charge stripping efficiency, and the grapheme material of high-quality can be obtained under low power ultrasound.In addition, because ultrasonic time shortens, the problem that the size that it also avoid graphene film diminishes because ultrasonic time is long.The graphite peeled off tentatively can reach 50 to 60 layers, and the size of sheet size about 5 × 5 μm of sheets maintains this size and homogeneous.Along with peeling off increasing of number of times, graphite is stripped into more and more thinner graphite microchip gradually and then forms Graphene.The graphite obtained by the inventive method newly can be used on the aspects such as electrically conductive ink, printed wiring, heat conducting film, nesa coating, photovoltaic films, and purposes is quite extensive.
Embodiment
Embodiments of the invention 1: a kind of liquid phase stripping method prepares the method for Graphene, comprises the following steps:
S1, utilizes instantaneous high-temperature plavini to process one or more in natural graphite, expansible black lead and expanded graphite, and namely 900 DEG C of heating 10 seconds, the volume after expansion is original about 300 times;
S2, contain in the aqueous solution of Sodium cholic acid by the graphite dispersion after expanding at 0.1mg/mL, in dispersion liquid, the concentration of graphite is 0.1mg/mL, carries out supersound process, and ultrasonic power is 250W, and ultrasonic time is 4 hours, makes its preliminary refinement; Centrifugation again, rotating speed 1500rpm, dry 12 hours of vacuum drying oven, for subsequent use;
S3, dried graphite is joined 6mg/mL and contain in stearic N-Methyl pyrrolidone solution, be configured to the dispersion liquid that graphite concentration is 0.1mg/mL, carry out supersound process, ultrasonic power is 250W, and ultrasonic time is 6 hours; Suction filtration, dry 12 hours of 120 DEG C of vacuum drying ovens;
S4, the few layer of graphite obtained by step S3 joins 5mg/mL and contains in the methyl phenylacetate solution of naphthalene methyl acetate, is configured to the dispersion liquid that graphite concentration is 0.1mg/mL, carries out supersound process, and ultrasonic power is 250W, and ultrasonic time is 4 hours; Suction filtration, dry 12 hours of 120 DEG C of vacuum drying ovens, obtain Graphene.
Embodiments of the invention 2: a kind of liquid phase stripping method prepares the method for Graphene, comprises the following steps:
S1, chemically expansible method is utilized to carry out expansion process to one or more in natural graphite, expansible black lead and expanded graphite, mix with muriate (as sodium-chlor) by one or more in natural graphite, expansible black lead and expanded graphite, grinding makes it to mix, then add the vitriol oil, 60 DEG C are incubated 24 hours, are finally washed till neutrality with pure water, dry for standby, the volume after expansion is original about 300 times;
S2, contain in the aqueous solution of Sodium cholic acid by the graphite dispersion after expanding at 0.1mg/mL, in dispersion liquid, the concentration of graphite is 0.5mg/mL, carries out supersound process, and ultrasonic power is 250W, and ultrasonic time is 4 hours, makes its preliminary refinement; Centrifugation again, rotating speed 1500rpm, dry 12 hours of vacuum drying oven, for subsequent use;
S3, joins 5mg/mL by dried graphite and contains in the methyl phenylacetate solution of naphthalene methyl acetate, is configured to the dispersion liquid that graphite concentration is 0.1mg/mL, carries out supersound process, and ultrasonic power is 250W, and ultrasonic time is 4 hours; Right suction filtration, dry 12 hours of 120 DEG C of vacuum drying ovens;
S4, the graphite obtained by step S3 joins 6mg/mL and contains in stearic N-Methyl pyrrolidone solution, is configured to the dispersion liquid that graphite concentration is 0.1mg/mL, carries out supersound process, and ultrasonic power is 250W, and ultrasonic time is 6 hours; Suction filtration, dry 12 hours of 120 DEG C of vacuum drying ovens, obtain Graphene.
Embodiments of the invention 3: a kind of liquid phase stripping method prepares the method for Graphene, comprises the following steps:
S1, utilizes instantaneous high-temperature plavini to carry out expansion process to one or more in natural graphite, expansible black lead and expanded graphite, namely 500 DEG C of heating 1 minute;
S2, in the aqueous solution that the graphite dispersion after expanding is contained sodium lauryl sulphate or Sodium dodecylbenzene sulfonate at 0.01mg/mL, in dispersion liquid, the concentration of graphite is 0.01mg/mL, carry out supersound process, ultrasonic power is 50W, and ultrasonic time is 30 minutes, makes its preliminary refinement; Centrifugation again, rotating speed 1000rpm, dry 5 hours of vacuum drying oven, for subsequent use;
S3, joins in DMF by dried graphite, is configured to the dispersion liquid that graphite concentration is 0.01mg/mL, carries out supersound process, and ultrasonic power is 50W, and ultrasonic time is 30 minutes; Suction filtration, dry 5 hours of vacuum drying oven;
S4, the few layer of graphite obtained by step S3 joins 5mmol/mL and contains in the methyl ethyl ether solution of sodium lauryl sulphate, is configured to the dispersion liquid that graphite concentration is 10mg/mL, carries out supersound process, and ultrasonic power is 50KW, and ultrasonic time is 18 hours; Suction filtration, dry 10 hours of vacuum drying oven, obtains Graphene.
Embodiments of the invention 4: a kind of liquid phase stripping method prepares the method for Graphene, comprises the following steps:
S1, utilizes instantaneous high-temperature plavini to carry out expansion process to one or more in natural graphite, expansible black lead and expanded graphite, namely 1800 DEG C of heating 5 seconds;
S2, contain in the aqueous solution of cetyl trimethylammonium bromide by the graphite dispersion after expanding at 50mg/mL, in dispersion liquid, the concentration of graphite is 10mg/mL, carries out supersound process, and ultrasonic power is 50KW, and ultrasonic time is 2 hours, makes its preliminary refinement; Centrifugation again, rotating speed 6000rpm, dry 8 hours of vacuum drying oven, for subsequent use;
S3, joins 4mmol/mL by dried graphite and contains in the ethyl acetate solution of CuPc, is configured to the dispersion liquid that graphite concentration is 3mg/mL, carries out supersound process, and ultrasonic power is 500W, and ultrasonic time is 55 minutes; Suction filtration, dry 8 hours of vacuum drying oven;
S4, the few layer of graphite obtained by step S3 joins in N-Methyl pyrrolidone, is configured to the dispersion liquid that graphite concentration is 1mg/mL, carries out supersound process, and ultrasonic power is 450W, and ultrasonic time is 3 hours; Suction filtration, dry 12 hours of vacuum drying oven;
S5, the few layer of graphite obtained by step S3 joins in methyl phenylacetate, is configured to the dispersion liquid that graphite concentration is 1mg/mL, carries out supersound process, and ultrasonic power is 450W, and ultrasonic time is 3 hours; Then suction filtration, dry 12 hours of vacuum drying oven, obtains Graphene.
Enforcement 5 of the present invention: a kind of liquid phase stripping method prepares the method for Graphene, comprises the following steps:
S1, chemically expansible method is utilized to carry out expansion process to one or more in natural graphite, expansible black lead and expanded graphite, mix with ammonium chloride by one or more in natural graphite, expansible black lead and expanded graphite, grinding makes it to mix, then the vitriol oil is added, 50 DEG C are incubated 10 minutes, are finally washed till neutrality with pure water, dry for standby;
S2, graphite dispersion after expanding is contained in the aqueous solution of Triton X-100, polyoxyethylene stearic acid ester or polyvinylpyrrolidone at 10mg/mL, in dispersion liquid, the concentration of graphite is 10mg/mL, carry out supersound process, ultrasonic power is 200W, ultrasonic time is 1 hour, makes its preliminary refinement; Centrifugation again, rotating speed 5000rpm, dry 7 hours of vacuum drying oven, for subsequent use;
S3, joins dried graphite in toluene or chlorobenzene, is configured to the dispersion liquid that graphite concentration is 5mg/mL, carries out supersound process, and ultrasonic power is 1KW, and ultrasonic time is 5 hours; Suction filtration, dry 6 hours of vacuum drying oven;
S4, the few layer of graphite obtained by step S3 joins 3mmol/mL and contains in the N-Methyl pyrrolidone solution of naphthalene methyl acetate, is configured to the dispersion liquid that graphite concentration is 0.01 ~ 10mg/mL, carries out supersound process, ultrasonic power is 250W, and ultrasonic time is 45 minutes; Suction filtration, dry 5 hours of vacuum drying oven, obtains Graphene.
Enforcement 6 of the present invention: a kind of liquid phase stripping method prepares the method for Graphene, comprises the following steps:
S1, chemically expansible method is utilized to carry out expansion process to one or more in natural graphite, expansible black lead and expanded graphite, mix with ammonium hydrogencarbonate by one or more in natural graphite, expansible black lead and expanded graphite, grinding makes it to mix, then the vitriol oil is added, 100 DEG C are incubated 10 hours, are finally washed till neutrality with pure water, dry for standby;
S2, contain in the aqueous solution of tween by the graphite dispersion after expanding at 0.5mg/mL, in dispersion liquid, the concentration of graphite is 0.8mg/mL, carries out supersound process, and ultrasonic power is 100W, and ultrasonic time is 1.5 hours, makes its preliminary refinement; Centrifugation again, rotating speed 4000rpm, dry 10 hours of vacuum drying oven, for subsequent use;
S3, dried graphite being joined 1mmol/mL contains in the also benzole soln of polyvinylpyrrolidone or polyethylene oxide-poly(propylene oxide)-polyethylene oxide triblock copolymer (P123), be configured to the dispersion liquid that graphite concentration is 0.05mg/mL, carry out supersound process, ultrasonic power is 300W, and ultrasonic time is 2 hours; Suction filtration, dry 9 hours of vacuum drying oven;
S4, the few layer of graphite obtained by step S3 joins in tetrahydrofuran (THF) or dimethyl sulfoxide (DMSO), is configured to the dispersion liquid that graphite concentration is 0.09mg/mL, carries out supersound process, and ultrasonic power is 400W, and ultrasonic time is 3 hours; Suction filtration, dry 6 hours of vacuum drying oven;
S5, the graphite obtained by step S4 joins 6mg/mL and contains in stearic N-Methyl pyrrolidone solution, is configured to the dispersion liquid that graphite concentration is 0.1mg/mL, carries out supersound process, and ultrasonic power is 250W, and ultrasonic time is 6 hours; Suction filtration, dry 12 hours of 120 DEG C of vacuum drying ovens;
S6, the graphite obtained by step S5 joins 5mg/mL and contains in the methyl phenylacetate solution of naphthalene methyl acetate, is configured to the dispersion liquid that graphite concentration is 0.1mg/mL, carries out supersound process, and ultrasonic power is 250W, and ultrasonic time is 4 hours; Suction filtration, dry 12 hours of 120 DEG C of vacuum drying ovens, obtain Graphene.
Claims (10)
1. liquid phase stripping method prepares a method for Graphene, it is characterized in that, comprises the following steps:
S1, utilizes plavini to carry out expansion process to graphite raw material;
S2, by the graphite dispersion after expansion containing in the aqueous solution of tensio-active agent, carries out supersound process, more centrifugal, dry, for subsequent use;
S3, dried graphite is joined the mixed solution of organic solvent, organic solvent and tensio-active agent or organic solvent and with Graphene have similarity surface can material mixed solution in, carry out supersound process, then suction filtration, drying, repeating step S31 ~ 10 time, obtain Graphene.
2. liquid phase stripping method according to claim 1 prepares the method for Graphene, it is characterized in that: described graphite raw material is one or more in natural graphite, expansible black lead and expanded graphite.
3. liquid phase stripping method according to claim 1 and 2 prepares the method for Graphene, it is characterized in that: the plavini in described step S1 is instantaneous high-temperature plavini, and it is specially: by graphite raw material 500 ~ 1800 DEG C of heating 5 seconds ~ 1 minute.
4. liquid phase stripping method according to claim 1 and 2 prepares the method for Graphene, it is characterized in that: the plavini in described step S1 is chemically expansible method, be specially: easily generate the compound of gas by graphite raw material and halogenide or containing the little ion of radius, grinding makes it to mix, then the vitriol oil is added, 50 ~ 100 DEG C are incubated 10 minutes ~ 24 hours, are finally washed till neutrality with pure water, dry for standby.
5. liquid phase stripping method according to claim 1 prepares the method for Graphene, it is characterized in that: described step S2 is specially: the graphite dispersion after expanding is contained in the aqueous solution of tensio-active agent at 0.01 ~ 50mg/mL, in dispersion liquid, the concentration of graphite is 0.01 ~ 10mg/mL, carry out supersound process, ultrasonic power is 50W ~ 50KW, ultrasonic time is 30 minutes ~ 4 hours, makes its preliminary refinement; Centrifugation again, rotating speed 1000 ~ 6000rpm, vacuum drying oven drying 5 ~ 12 hours, for subsequent use; Wherein, described tensio-active agent is Sodium cholic acid, sodium lauryl sulphate, Sodium dodecylbenzene sulfonate, cetyl trimethylammonium bromide, Triton X-100, polyoxyethylene stearic acid ester, tween or polyvinylpyrrolidone.
6. liquid phase stripping method prepares the method for Graphene according to claim 1 or 5, it is characterized in that: described step S2 is specially: the graphite dispersion after expanding is contained in the aqueous solution of Sodium cholic acid at 0.1mg/mL, in dispersion liquid, the concentration of graphite is 0.01 ~ 10mg/mL, carry out supersound process, ultrasonic power is 250W, ultrasonic time is 4 hours, makes its preliminary refinement; Centrifugation again, rotating speed 1500rpm, dry 12 hours of vacuum drying oven, for subsequent use.
7. liquid phase stripping method according to claim 1 prepares the method for Graphene, it is characterized in that: in described step S3, the mixed solution of adjacent twice organic solvent used, organic solvent and tensio-active agent or organic solvent and with Graphene have similarity surface can the mixed solution of material be not identical.
8. liquid phase stripping method according to claim 7 prepares the method for Graphene, it is characterized in that: described step S3 is specially: dried graphite joined mixed solution or the organic solvent of organic solvent, organic solvent and tensio-active agent and have in the mixed solution of the material of similarity surface energy with Graphene, be configured to the dispersion liquid that graphite concentration is 0.01 ~ 10mg/mL, carry out supersound process, ultrasonic power is 50W ~ 50KW, and ultrasonic time is 30 minutes ~ 18 hours; Then suction filtration, vacuum drying oven drying 5 ~ 12 hours; Wherein, described tensio-active agent is stearic acid, Sodium cholic acid, sodium lauryl sulphate, Sodium dodecylbenzene sulfonate, cetyl trimethylammonium bromide, Triton X-100, polyoxyethylene stearic acid ester, tween, polyvinylpyrrolidone or polyethylene oxide-poly(propylene oxide)-polyethylene oxide triblock copolymer; Described have with Graphene similarity surface can material be CuPc or naphthalene methyl acetate; Described organic solvent is alkane ketone, amides, ethers, ester class, ramification of benzene, fused ring compound and derivative thereof or small molecule solvent.
9. the liquid phase stripping method according to claim 1 or 7 or 8 prepares the method for Graphene, it is characterized in that: described step S3 is specially: dried graphite is joined 6mg/mL and contain in stearic N-Methyl pyrrolidone solution, be configured to the dispersion liquid that graphite concentration is 0.1mg/mL, carry out supersound process, ultrasonic power is 250W, and ultrasonic time is 6 hours; Suction filtration, dry 12 hours of 120 DEG C of vacuum drying ovens.
10. the liquid phase stripping method according to claim 1 or 7 or 8 prepares the method for Graphene, it is characterized in that: described step S3 is specially: dried graphite is joined 5mg/mL and contain in the methyl phenylacetate solution of naphthalene methyl acetate, be configured to the dispersion liquid that concentration is 0.1mg/mL, carry out supersound process, ultrasonic power is 250W, and ultrasonic time is 4 hours; Suction filtration, dry 12 hours of 120 DEG C of vacuum drying ovens.
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