A kind of preparation method of graphene and reduced graphene oxide composite film

A graphene composite and graphene film technology, applied in the field of nanomaterial preparation and application, can solve the problems of limited application, poor adhesion, easy surface oxidation, etc., and achieve high flexibility, high light transmittance, and simple preparation. Effect

Active Publication Date: 2015-08-12
广西清鹿新材料科技有限责任公司
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Problems solved by technology

These materials have inherent deficiencies such as surface oxidation and poor conformability due to structural stress
The low temperature coefficient of resistance characteristics of these materials are characterized by a physical property comprehensive tester (PPMS) in vacuum, which limits their application in the actual atmospheric atmosphere
In addition, the thickness of thin film resistors prepared based on the above low temperature coefficient of resistance materials is generally greater than 100nm, which is not a real two-dimensional material

Method used

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  • A kind of preparation method of graphene and reduced graphene oxide composite film
  • A kind of preparation method of graphene and reduced graphene oxide composite film
  • A kind of preparation method of graphene and reduced graphene oxide composite film

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preparation example Construction

[0019] A kind of preparation method of graphene and reduced graphene oxide composite film is characterized in that comprising the following steps:

[0020] 1) Immerse the substrate with the graphene film attached in the PDDA aqueous solution, soak it, rinse it with water after taking it out, and obtain the graphene film with PDDA molecules adsorbed; the volume mass concentration of the PDDA aqueous solution is 10g / L-30g / L, and the soaking time 10min to 30min, the substrate of the graphene film can be quartz, glass or silicon wafer;

[0021] 2) Immerse the graphene film with PDDA molecules adsorbed in step 1) in the graphene oxide aqueous solution, soak it, take it out and rinse it with water to obtain a graphene and graphene oxide composite film; the volume mass fraction of the graphene oxide aqueous solution is 0.05 mg / mL-1mg / mL, soaking time is 10min~30min,

[0022] 3) Dry the formed graphene and graphene oxide composite film, and then place it in a protective atmosphere t...

Embodiment 1

[0025] This embodiment includes the following steps:

[0026] 1) Immerse the quartz sheet with graphene attached in PDDA aqueous solution (20g / L, pH=9), soak for 20min, take it out and rinse with water to obtain a graphene film with PDDA molecules adsorbed;

[0027] 2) Immerse the graphene film on which PDDA molecules are adsorbed in step 1) in a graphene oxide aqueous solution (0.05 mg / mL, pH=9), soak for 20 minutes, take it out and rinse it with water to obtain a composite film of graphene and graphene oxide;

[0028] 3) Blow dry the formed graphene and graphene oxide composite film with nitrogen, and then fully reduce it in an argon atmosphere at 300° C. to obtain a composite film of graphene and reduced graphene oxide.

[0029] Figure 2a A scanning electron micrograph of the graphene and reduced graphene oxide composite film prepared in this example, a small amount of reduced graphene oxide flakes are attached on the graphene film. The resistance-temperature variation c...

Embodiment 2

[0031] This embodiment includes the following steps:

[0032] 1) Immerse the glass sheet with graphene attached in PDDA aqueous solution (30g / L, pH=9), soak for 10min, take it out and rinse with water to obtain a graphene film with PDDA molecules adsorbed;

[0033] 2) Immerse the graphene film with PDDA molecules adsorbed in step 1) in a graphene oxide aqueous solution (0.1mg / mL, pH=9), soak for 30min, take it out and rinse with water to obtain a composite film of graphene and graphene oxide;

[0034] 3) Blow dry the formed graphene and graphene oxide composite film with nitrogen, and then place it in a nitrogen atmosphere at 600°C for full reduction to obtain a composite film of graphene and reduced graphene oxide.

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Abstract

The invention relates to a method for preparing a graphene and reduction oxidation graphene composite film, comprising the following steps: firstly submerging a substrate affixed with a graphene film in a PDDA (poly diallyl dimethylamine hydrochloride salt) solution, immersing, rinsing with water after removing, submerging the graphene film adsorbed with PDDA molecules in an oxidation grapheme aqueous solution, immersing, rinsing with water after removing, blow-drying the prepared composite film, and fully reducing in a protection atmosphere of 300-800 DEG C to get the graphene and reduction oxidation graphene composite film. The invention achieves controllable preparation of graphene and reduction oxidation graphene composite film with a large area, ultra-thin property, high light transmittance and an ultra-low resistance temperature coefficient.

Description

technical field [0001] The invention relates to the technical field of nanomaterial preparation and application, in particular to a method for preparing a graphene and reduced graphene oxide composite film with an ultra-low temperature coefficient of resistance. Background technique [0002] Graphene (Graphene) [Reference 1: K.S.Novoselov, A.K.Geim, S.V.Morozov, D.Jiang, Y.Zhang, S.V.Dubonos, I.V.Grigorieva, A.A.Firsov.Electric field effect in atomically thin carbon films.Science, 2004,306 (5696):666-669], by sp 2 The hybrid carbon atoms are closely arranged in a honeycomb lattice structure, which is a strictly two-dimensional crystal material with excellent electrical and optical properties. Currently, chemical vapor deposition (CVD) [Reference 2: X.Li, W.Cai, J.An, S.Kim, J.Nah, D.Yang, R.Piner, A.Velamakanni, I. Jung,E.Tutuc,S.K.Banerjee,L.Colombo,R.S.Ruoff.Large-Area Synthesis of High-Quality and Uniform Graphene Films on Copper Foils.Science,2009,324(5932):1312-1314] ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C17/34C04B41/52
Inventor 孙鹏展朱宏伟朱淼王昆林韦进全吴德海
Owner 广西清鹿新材料科技有限责任公司
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