CN103265012B - Methods for preparing large-area graphene film and large-area graphene composite films - Google Patents
Methods for preparing large-area graphene film and large-area graphene composite films Download PDFInfo
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Abstract
The invention discloses a method for preparing a large-area graphene film. The method comprises the following steps of pouring a graphene oxide aqueous solution on a paper base material to obtain a uniformly-covering graphene oxide film, carrying out drying curing treatment, and dipping the paper base material with the graphene oxide film into hydroiodic acid for a reduction reaction, wherein in the reduction reaction, the paper base material is hydrolyzed under the acidic condition and simultaneously, reacts with an acid to produce bubbles so that the graphene oxide film is automatically separated from the paper base material and the large-area graphene film product is obtained. The invention also discloses a method for preparing the graphene film or large-area graphene composite films. The methods can realize graphene reduction without a high-temperature or a toxic reduction reagent, can conveniently and fast realize film stripping to produce large-area film products and are suitable for large-scale industrial production.
Description
Technical field
The invention belongs to technical field of graphene preparation, more specifically, relate to a kind of method preparing large-area graphene and laminated film thereof.
Background technology
Along with the development of modern technologies, for satisfied flexibility can carry design and the power requirement of electron device (as rollable display screen, wearable electronic etc.), make the study hotspot that ultralight, flexible, safe energy storage device is just becoming people.Graphene film is as a kind of new carbon, because it has bigger serface, high-mechanical property, the electron transport ability of excellence and the feature such as the electrochemical properties of relative inertness and lower cost, thus be expected to obtain widespread use in multiple fields such as energy storage.
Method at present for the preparation of graphene film mainly comprises spin-coating method, spraying method, suction method and chemical Vapor deposition process (CVD) etc., wherein spin-coating method is as the conventional working method in laboratory, the graphene film that area is less can only be prepared, and the thickness distribution of obtained film is uneven, require also harsher to solution; Although spraying method can prepare the graphene film of larger area, operation steps is complicated, preparation cost is relatively high, is unfavorable for large-scale industrial production; Suction method faces suction filtration time long, film size equally and limits by device, the problem such as be difficult to prepared by big area; For chemical Vapor deposition process, although can big area synthesizing graphite alkene film, but must metal catalytic layer be adopted and on metal catalytic substrate synthesizing graphite alkene film, synthesis temperature is generally more than 650 DEG C, during such actually operating, the large-area graphene film of synthesizing on the metallic substrate must be transferred on other substrates and just can use, the corresponding inconvenience caused in actual production.Therefore, need badly in the related art and find a kind of more perfect preparation method, large-area graphene film and other composite prods can be obtained in mode that is simple, that be convenient to manipulate.
Summary of the invention
For above defect or the Improvement requirement of prior art, the invention provides a kind of method preparing large-area graphene and laminated film thereof, wherein by adopting paper substrates as the intermediate carrier of graphene oxide and composite film thereof, when it to be under sour environment and to perform reduction reaction by hydroiodic acid HI, the reduction process of Graphene can be performed smoothly, facilitate simultaneously, realize the stripping of rete rapidly to obtain required large area film product, can break away from hot conditions or other poisonous dependences of going back original reagent in this way, and solve large area film in prior art be difficult to peel off technical problem.
According to a first aspect of the present invention, provide a kind of method preparing large-area graphene film, it is characterized in that, the method comprises the following steps: successively
A mass concentration is that the graphene oxide water solution of 0.1mg/ml ~ 10mg/ml is poured on the paper substrates of tiling by (), make it flow and on the whole surface of paper substrates, form the rete of one deck uniform fold, then performing baking and curing process;
B the paper substrates carrying graphene oxide rete is immersed in hydrochloric acid, phosphoric acid, acetic acid or the sulfuric acid that volumetric molar concentration is 0.5mol/L ~ 2mol/L by (), paper substrates issues unboiled water solution at sour environment, generates bubble with acid-respons simultaneously in the process, impels graphene oxide rete to automatically disengage paper substrates thus;
C () takes out the graphene oxide rete after departing from, and to be immersed in massfraction be perform reduction reaction in the hydroiodic acid HI of 45% ~ 55%, obtains required large-area graphene film product thus.
According to a second aspect of the present invention, provide a kind of method preparing large-area graphene film, it is characterized in that, the method comprises the following steps: successively
I mass concentration is that the graphene oxide water solution of 0.1mg/ml ~ 10mg/ml is poured on the paper substrates of tiling by (), make it flow and on the whole surface of paper substrates, form the rete of one deck uniform fold, then performing baking and curing process;
(ii) paper substrates carrying graphene oxide rete being directly immersed in massfraction is perform reduction reaction in the hydroiodic acid HI of 45% ~ 55%, in this reduction process, paper substrates occurs to be hydrolyzed to react with hydroiodic acid HI simultaneously and generates bubble, Graphene rete is impelled to automatically disengage paper substrates thus, and the large-area graphene film product needed for obtaining.
According to a third aspect of the present invention, provide a kind of method preparing large-area graphene/carbon nano-tube coextruded film, it is characterized in that, the method comprises the following steps: successively
(1) to mass concentration be 2mg/ml ~ 8mg/ml graphene oxide water solution in add multi-walled carbon nano-tubes and perform ultrasonic disperse obtain mixed solution, wherein the quality proportioning of graphene oxide and multi-walled carbon nano-tubes is 2:1 ~ 5:1, the paper substrates this mixed solution being coated tiling forms the composite film of one deck uniform fold over its entire surface, then performs baking and curing process;
(2) paper substrates carrying graphene oxide/carbon nano-tube compound film layer being immersed in massfraction is perform reduction reaction in the hydroiodic acid HI of 45% ~ 55%, in this reduction process, paper substrates occurs to be hydrolyzed to react with hydroiodic acid HI simultaneously and generates bubble, graphene/carbon nano-tube composite film is impelled to automatically disengage paper substrates thus, and the large-area graphene/carbon nano-tube coextruded film product needed for obtaining.
According to a fourth aspect of the present invention, provide a kind of method preparing large-area graphene/polyaniline laminated film, it is characterized in that, the method comprises the following steps: successively
(A) to mass concentration be 3mg/ml ~ 6mg/ml graphene oxide water solution in add polyaniline nano fiber and perform ultrasonic disperse obtain mixed solution, wherein the quality proportioning of graphene oxide and polyaniline nano fiber is 2:1 ~ 4:1, the paper substrates this mixed solution being coated tiling forms the composite film of one deck uniform fold over its entire surface, then performs baking and curing process;
(B) paper substrates carrying graphene oxide/polyaniline composite film layer being immersed in massfraction is perform reduction reaction in the hydroiodic acid HI of 45% ~ 55%, in this reduction process, paper substrates occurs to be hydrolyzed to react with hydroiodic acid HI simultaneously and generates bubble, graphene/polyaniline composite film is impelled to automatically disengage paper substrates thus, and the large-area graphene/polyaniline laminated film product needed for obtaining.
According to a fifth aspect of the present invention, provide a kind of method preparing large-area graphene/polypyrrole composite film, it is characterized in that, the method comprises the following steps: successively
(I) to mass concentration be 3mg/ml ~ 6mg/ml graphene oxide water solution in add polypyrrole nano particle and perform ultrasonic disperse obtain mixed solution, wherein the quality proportioning of graphene oxide and polypyrrole nano particle is 2:1 ~ 4:1, the paper substrates this mixed solution being coated tiling forms the composite film of one deck uniform fold over its entire surface, then performs baking and curing process;
(II) paper substrates carrying graphene oxide/composite polypyrrole film layer being immersed in massfraction is perform reduction reaction in the hydroiodic acid HI of 45% ~ 55%, in this reduction process, paper substrates occurs to be hydrolyzed to react with hydroiodic acid HI simultaneously and generates bubble, Graphene/composite polypyrrole film layer is impelled to automatically disengage paper substrates thus, and the large-area graphene/polypyrrole composite film product needed for obtaining.
As further preferably, described paper substrates is selected from printer paper, plotting paper, kraft paper, water writing paper, blotting paper or enamelled paper or other analogous materials.
As further preferably, stainless steel bar or coating roll is adopted to make the graphene oxide rete or its composite film that the whole surface of paper substrates are formed uniform fold.
In general, the above technical scheme conceived by the present invention compared with prior art, mainly possesses following technological merit:
1, by adopting paper substrates as the intermediate carrier of graphene oxide and composite film thereof, when it is under sour environment, hydrolysis reaction makes the degree of crystallinity of paper fiber be destroyed on the one hand, the polymerization degree and intensity losses, additive on the other hand contained by it can generate many small bubbles with acid-respons, these small bubbles act on the interface between paper substrates and graphene oxide/Graphene/graphene composite film layer, impel rete peel off and can not cause damage to it; The stripping of rete can be realized in this way fast, expediently, and can operate at normal temperatures;
2, by adopting hydroiodic acid HI as the reducing substance of graphene oxide, can break away from hot conditions or poisonous dependence of going back original reagent, contribute to the generation of large area film product, in addition, when direct the paper substrates carrying rete is dipped into hydroiodic acid HI time, the stripping of graphene oxide or its composite film and reduction can be carried out simultaneously;
3, the preparation of large-area graphene film and other kinds graphene composite film can not only can be realized at normal temperatures according to preparation method of the present invention, and simple to operate, be convenient to manipulation, low, the environmentally safe of cost, obtained film product possesses good flexibility and planeness, is thus particularly useful for large batch of suitability for industrialized production purposes.
Accompanying drawing explanation
Fig. 1 be according to the large-area graphene film obtained by the embodiment of the present invention 3 section SEM scheme;
Fig. 2 schemes according to the SEM of the large-area graphene obtained by the embodiment of the present invention 7/polyaniline laminated film.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.In addition, if below in described each embodiment of the present invention involved technical characteristic do not form conflict each other and just can mutually combine.
Embodiment 1
Be that the graphene oxide water solution of 5mg/ml is poured on the commercial A4 printer paper of tiling by 150ml mass concentration, by stainless steel bar rolling method, graphene oxide solution flowed and on the whole surface of printer paper, form the rete of one deck uniform fold, then at room temperature naturally drying solidification;
At room temperature the printer paper carrying graphene oxide rete being immersed in volumetric molar concentration is in the hydrochloric acid of 1mol/L, paper substrates issues unboiled water solution at sour environment, generates bubble with acid-respons simultaneously in the process, within about 10 minutes, rear oxidation Graphene rete strips down from printer paper easily, can obtain the graphene oxide film of A4 size after drying; This film possesses good flexibility, and can be arbitrarily curling;
Then this graphene oxide film at room temperature can be immersed in again massfraction is perform reduction reaction in the hydroiodic acid HI of 45%, obtains required graphene film product thus.
Embodiment 2
Be that the graphene oxide water solution of 10mg/ml is poured on the commercial A4 printer paper of tiling by 150ml mass concentration, by stainless steel bar rolling method, graphene oxide solution flowed and on the whole surface of printer paper, form the rete of one deck uniform fold, then at room temperature naturally drying solidification;
At room temperature the printer paper carrying graphene oxide rete being immersed in volumetric molar concentration is in the acetic acid of 0.5mol/L, paper substrates issues unboiled water solution at sour environment, generates bubble with acid-respons simultaneously in the process, within about 10 minutes, rear oxidation Graphene rete strips down from printer paper easily, can obtain the graphene oxide film of A4 size after drying; This film possesses good flexibility, and can be arbitrarily curling;
Then this graphene oxide film at room temperature can be immersed in again massfraction is perform reduction reaction in the hydroiodic acid HI of 50%, obtains required graphene film product thus.
Embodiment 3
Be the specification that the graphene oxide water solution of 0.1mg/ml is poured over tiling by 300ml mass concentration be the plotting paper of 35cm*35cm, adopt stainless steel bar rolling method make it flow and on the whole surface of plotting paper, form the rete of one deck uniform fold, then perform baking and curing process;
At room temperature the plotting paper carrying graphene oxide rete is directly immersed in the hydroiodic acid HI of massfraction 55% and performs reduction reaction, in this reduction process, plotting paper occurs to be hydrolyzed to react with hydroiodic acid HI simultaneously and generates bubble, Graphene rete is impelled to automatically disengage plotting paper thus, and the large-area graphene film product needed for obtaining.Obtained large-area graphene film section SEM scheme as shown in Figure 1.
Embodiment 4
Be the specification that the graphene oxide water solution of 4mg/ml is poured over tiling by 300ml mass concentration be the plotting paper of 35cm*35cm, adopt stainless steel bar rolling method make it flow and on the whole surface of plotting paper, form the rete of one deck uniform fold, then at room temperature naturally dry solidification;
At room temperature the plotting paper carrying graphene oxide rete is directly immersed in the hydroiodic acid HI of massfraction 45% and performs reduction reaction, in this reduction process, plotting paper occurs to be hydrolyzed to react with hydroiodic acid HI simultaneously and generates bubble, Graphene rete is impelled to automatically disengage plotting paper thus, and the large-area graphene film product needed for obtaining.
Embodiment 5
Be add 50mg multi-walled carbon nano-tubes in the graphene oxide water solution of 2mg/ml and perform ultrasonic disperse to obtain mixed solution after 2 hours to 40ml mass concentration, the specification this mixed solution being coated tiling is on the kraft paper of 40cm*40cm, and form the composite film of one deck uniform fold over its entire surface, then perform baking and curing process;
At room temperature the kraft paper carrying graphene oxide/carbon nano-tube compound film layer is immersed in the hydroiodic acid HI of massfraction 50% and performs reduction reaction, in this reduction process, kraft paper occurs to be hydrolyzed to react with hydroiodic acid HI simultaneously and generates bubble, graphene/carbon nano-tube composite film is impelled to automatically disengage kraft paper thus, and the large-area graphene/carbon nano-tube coextruded film product needed for obtaining.
Embodiment 6
Be add 100mg multi-walled carbon nano-tubes in the graphene oxide water solution of 5mg/ml and perform ultrasonic disperse to obtain mixed solution after 2 hours to 40ml mass concentration, the specification that this mixed solution is coated tiling by coating roll is on the kraft paper of 40cm*40cm, and form the composite film of one deck uniform fold over its entire surface, then perform baking and curing process;
At room temperature the kraft paper carrying graphene oxide/carbon nano-tube compound film layer being immersed in massfraction is perform reduction reaction in the hydroiodic acid HI of 45%, in this reduction process, kraft paper occurs to be hydrolyzed to react with hydroiodic acid HI simultaneously and generates bubble, graphene/carbon nano-tube composite film is impelled to automatically disengage kraft paper thus, and the large-area graphene/carbon nano-tube coextruded film product needed for obtaining.
Embodiment 7
The Ammonium Persulfate 98.5 of the aniline solution of 0.3ml and 0.18g is dissolved in 10ml respectively, volumetric molar concentration is in the hydrochloric acid of 1mol/L, vibrate 30 seconds after short mix, left at room temperature reacts 2 hours, namely obtains polyaniline nano fiber; The polyaniline nano fiber obtained by 100mg is added in the 40ml mass concentration graphene oxide water solution that is 5mg/ml, and perform ultrasonic disperse acquisition mixed solution, the A4 printer paper this mixed solution being coated tiling by coating roll forms the composite film of one deck uniform fold over its entire surface, then performs baking and curing process;
At room temperature the printer paper carrying graphene oxide/polyaniline composite film layer is immersed in the hydroiodic acid HI of massfraction 50% and performs reduction reaction, in this reduction process, printer paper occurs to be hydrolyzed to react with hydroiodic acid HI simultaneously and generates bubble, graphene/polyaniline composite film is impelled to automatically disengage printer paper thus, and the large-area graphene/polyaniline laminated film product needed for obtaining, the SEM figure of this laminated film sample is as shown in Figure 2.
Embodiment 8
The Ammonium Persulfate 98.5 of the aniline solution of 0.3ml and 0.18g is dissolved in 10ml respectively, volumetric molar concentration is in the hydrochloric acid of 1mol/L, vibrate 30 seconds after short mix, left at room temperature reacts 2 hours, namely obtains polyaniline nano fiber; The polyaniline nano fiber obtained by 100mg is added in the 40ml mass concentration graphene oxide water solution that is 3mg/ml, and perform ultrasonic disperse acquisition mixed solution, the A4 printer paper this mixed solution being coated tiling forms the composite film of one deck uniform fold over its entire surface, then performs baking and curing process;
At room temperature the printer paper carrying graphene oxide/polyaniline composite film layer being immersed in massfraction is perform reduction reaction in the hydroiodic acid HI of 45%, in this reduction process, printer paper occurs to be hydrolyzed to react with hydroiodic acid HI simultaneously and generates bubble, graphene/polyaniline composite film is impelled to automatically disengage printer paper thus, and the large-area graphene/polyaniline laminated film product needed for obtaining.
Embodiment 9
Be add polypyrrole nano particle in the graphene oxide water solution of 3mg/ml and perform ultrasonic disperse to obtain mixed solution to mass concentration, wherein the quality proportioning of graphene oxide and polypyrrole nano particle is 2:1, the specification this mixed solution being coated tiling be 30cm*30cm enamelled paper on and form the composite film of one deck uniform fold over its entire surface, then perform baking and curing process;
The enamelled paper carrying graphene oxide/composite polypyrrole film layer being immersed in massfraction is perform reduction reaction in the hydroiodic acid HI of 55%, in this reduction process, paper substrates occurs to be hydrolyzed to react with hydroiodic acid HI simultaneously and generates bubble, Graphene/composite polypyrrole film layer is impelled to automatically disengage paper substrates thus, and the large-area graphene/polypyrrole composite film product needed for obtaining.
Embodiment 10
Be add polypyrrole nano particle in the graphene oxide water solution of 6mg/ml and perform ultrasonic disperse to obtain mixed solution to mass concentration, wherein the quality proportioning of graphene oxide and polypyrrole nano particle is 4:1, the specification this mixed solution being coated tiling be 30cm*30cm enamelled paper on and form the composite film of one deck uniform fold over its entire surface, then perform baking and curing process;
The enamelled paper carrying graphene oxide/composite polypyrrole film layer being immersed in massfraction is perform reduction reaction in the hydroiodic acid HI of 45%, in this reduction process, enamelled paper occurs to be hydrolyzed to react with hydroiodic acid HI simultaneously and generates bubble, Graphene/composite polypyrrole film layer is impelled to automatically disengage enamelled paper thus, and the large-area graphene/polypyrrole composite film product needed for obtaining.
Those skilled in the art will readily understand; the foregoing is only preferred embodiment of the present invention; not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. prepare a method for large-area graphene film, it is characterized in that, the method comprises the following steps: successively
A mass concentration is that the graphene oxide water solution of 0.1mg/ml ~ 10mg/ml is poured on the paper substrates of tiling by (), make it flow and on the whole surface of paper substrates, form the rete of one deck uniform fold, then performing baking and curing process;
B the paper substrates carrying graphene oxide rete is immersed in hydrochloric acid, phosphoric acid, acetic acid or the sulfuric acid that volumetric molar concentration is 0.5mol/L ~ 2mol/L by (), paper substrates issues unboiled water solution at sour environment, generates bubble with acid-respons simultaneously in the process, impels graphene oxide rete to automatically disengage paper substrates thus;
C () takes out the graphene oxide rete after departing from, and to be immersed in massfraction be perform reduction reaction in 45% ~ 55% hydroiodic acid HI, obtains required large-area graphene film product thus.
2. prepare a method for large-area graphene film, it is characterized in that, the method comprises the following steps: successively
I mass concentration is that the graphene oxide water solution of 0.1mg/ml ~ 10mg/ml is poured on the paper substrates of tiling by (), make it flow and on the whole surface of paper substrates, form the rete of one deck uniform fold, then performing baking and curing process;
(ii) paper substrates carrying graphene oxide rete being directly immersed in massfraction is perform reduction reaction in the hydroiodic acid HI of 45% ~ 55%, in this reduction process, paper substrates occurs to be hydrolyzed to react with hydroiodic acid HI simultaneously and generates bubble, Graphene rete is impelled to automatically disengage paper substrates thus, and the large-area graphene film product needed for obtaining.
3. prepare a method for large-area graphene/carbon nano-tube coextruded film, it is characterized in that, the method comprises the following steps: successively
(1) to mass concentration be 2mg/ml ~ 8mg/ml graphene oxide water solution in add multi-walled carbon nano-tubes and perform ultrasonic disperse obtain mixed solution, wherein the quality proportioning of graphene oxide and multi-walled carbon nano-tubes is 2:1 ~ 5:1, the paper substrates this mixed solution being coated tiling forms the composite film of one deck uniform fold over its entire surface, then performs baking and curing process;
(2) paper substrates carrying graphene oxide/carbon nano-tube compound film layer being immersed in massfraction is perform reduction reaction in the hydroiodic acid HI of 45% ~ 55%, in this reduction process, paper substrates occurs to be hydrolyzed to react with hydroiodic acid HI simultaneously and generates bubble, graphene/carbon nano-tube composite film is impelled to automatically disengage paper substrates thus, and the large-area graphene/carbon nano-tube coextruded film product needed for obtaining.
4. prepare a method for large-area graphene/polyaniline laminated film, it is characterized in that, the method comprises the following steps: successively
(A) to mass concentration be 3mg/ml ~ 6mg/ml graphene oxide water solution in add polyaniline nano fiber and perform ultrasonic disperse obtain mixed solution, wherein the quality proportioning of graphene oxide and polyaniline nano fiber is 2:1 ~ 4:1, the paper substrates this mixed solution being coated tiling forms the composite film of one deck uniform fold over its entire surface, then performs baking and curing process;
(B) paper substrates carrying graphene oxide/polyaniline composite film layer being immersed in massfraction is perform reduction reaction in the hydroiodic acid HI of 45% ~ 55%, in this reduction process, paper substrates occurs to be hydrolyzed to react with hydroiodic acid HI simultaneously and generates bubble, graphene/polyaniline composite film is impelled to automatically disengage paper substrates thus, and the large-area graphene/polyaniline laminated film product needed for obtaining.
5. prepare a method for large-area graphene/polypyrrole composite film, it is characterized in that, the method comprises the following steps: successively
(I) to mass concentration be 3mg/ml ~ 6mg/ml graphene oxide water solution in add polypyrrole nano particle and perform ultrasonic disperse obtain mixed solution, wherein the quality proportioning of graphene oxide and polypyrrole nano particle is 2:1 ~ 4:1, the paper substrates this mixed solution being coated tiling forms the composite film of one deck uniform fold over its entire surface, then performs baking and curing process;
(II) paper substrates carrying graphene oxide/composite polypyrrole film layer being immersed in massfraction is perform reduction reaction in the hydroiodic acid HI of 45% ~ 55%, in this reduction process, paper substrates occurs to be hydrolyzed to react with hydroiodic acid HI simultaneously and generates bubble, Graphene/composite polypyrrole film layer is impelled to automatically disengage paper substrates thus, and the large-area graphene/polypyrrole composite film product needed for obtaining.
6. the method as described in claim 1-5 any one, is characterized in that, described paper substrates is selected from printer paper, plotting paper, kraft paper, water writing paper, blotting paper or enamelled paper.
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| CN110523297B (en) * | 2019-09-09 | 2022-07-19 | 香港纺织及成衣研发中心有限公司 | Graphene oxide composite nanofiltration membrane and preparation method thereof |
| CN111518538B (en) * | 2020-04-26 | 2024-03-05 | 深圳市华星光电半导体显示技术有限公司 | Method for preparing luminous film, luminous film and display device |
| CN112010290A (en) * | 2020-08-26 | 2020-12-01 | 兰州大学 | Method for industrially preparing graphene film |
| CN112408366A (en) * | 2020-12-07 | 2021-02-26 | 南通第六元素材料科技有限公司 | Method for printing and in-situ reduction of graphene |
| WO2022141180A1 (en) * | 2020-12-30 | 2022-07-07 | 杭州高烯科技有限公司 | Method for stripping graphene oxide nano membrane from substrate |
| CN113070022B (en) * | 2021-03-22 | 2023-02-17 | 齐齐哈尔大学 | Batch circulating type ultrathin film unfolding preparation device |
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