WO2017197691A1 - 含功能化石墨烯层的液晶面板结构及功能化石墨烯膜的制备方法 - Google Patents

含功能化石墨烯层的液晶面板结构及功能化石墨烯膜的制备方法 Download PDF

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WO2017197691A1
WO2017197691A1 PCT/CN2016/085794 CN2016085794W WO2017197691A1 WO 2017197691 A1 WO2017197691 A1 WO 2017197691A1 CN 2016085794 W CN2016085794 W CN 2016085794W WO 2017197691 A1 WO2017197691 A1 WO 2017197691A1
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functionalized graphene
liquid crystal
film
layer
graphene oxide
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French (fr)
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李吉
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133711—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by organic films, e.g. polymeric films
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00—Liquid crystal materials
    • C09K19/52—Liquid crystal materials characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
    • C09K19/54—Additives having no specific mesophase characterised by their chemical composition
    • C09K19/56—Aligning agents
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/13378—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/13378—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation
    • G02F1/133784—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation by rubbing
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1343—Electrodes
    • G02F1/13439—Electrodes characterised by their electrical, optical, physical properties; materials therefor; method of making
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K2323/00—Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
    • C09K2323/02—Alignment layer characterised by chemical composition
    • C09K2323/021—Inorganic, e.g. glass or silicon oxide
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133514—Colour filters
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133742—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers for homeotropic alignment
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/1368—Active matrix addressed cells in which the switching element is a three-electrode device

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a liquid crystal panel structure containing a functionalized graphene layer and a method for preparing a functionalized graphene film.
  • Thin film transistor liquid crystal display has many advantages such as thin body, power saving, no radiation, etc., and has been widely used.
  • Most of the LCDs on the market are backlight type liquid crystal display devices, which include a liquid crystal display panel and a backlight module.
  • the working principle of the liquid crystal display panel is to place liquid crystal molecules in two parallel glass substrates, and control the liquid crystal molecules to change direction by energizing or not the glass substrate, and refract the light of the backlight module to produce a picture.
  • a liquid crystal display panel is composed of a color filter (CF) substrate, a thin film transistor (TFT) substrate, a liquid crystal (LC) layer sandwiched between a CF substrate and a TFT substrate, and a sealant frame (Sealant). )composition.
  • TFT-LCD displays the classification of liquid crystal-based modes of operation are: phase change (PC), twisted nematic (TN), super twisted nematic (STN), vertical alignment. (Vertical Alignment, VA), and In Plane Switching (IPS).
  • PC phase change
  • TN twisted nematic
  • STN super twisted nematic
  • VA Vertical Alignment
  • IPS In Plane Switching
  • a transparent conductive film is separately disposed on the CF substrate and the TFT substrate facing the liquid crystal layer. The main function of the transparent conductive film is to form an electric field between the CF substrate and the TFT substrate. Drives the liquid crystal molecules to deflect, thus achieving a bright and dark display.
  • a conventional transparent conductive film is an Indium Tin Oxides (ITO) film prepared by a physical vapor deposition (PVD) method.
  • ITO Indium Tin Oxides
  • PVD physical vapor deposition
  • an alignment film layer having a thickness of several tens to several hundreds of nanometers is usually coated or printed.
  • the LC can be made to have a certain direction.
  • the pretilt angle provides a bearing angle for the liquid crystal molecules (the pretilt angle has an important influence on the driving voltage, contrast, response time, viewing angle, etc.
  • the material of the alignment film is usually made of polyimide (Polyimide, PI) materials are mainly classified into friction-aligned PI materials and light-aligned PI materials, but any alignment material has its own disadvantages.
  • Graphene has excellent transparent conductive properties and mechanical properties, and many patents have reported the use of graphene as a transparent conductive film layer.
  • the method of forming a graphite transparent conductive layer may have direct Chemical Vapor Deposition (CVD) film formation method, CVD film formation-transfer method, graphene solution printing method, and graphene oxide solution printing-reduction method.
  • CVD Chemical Vapor Deposition
  • graphene solution printing method graphene solution printing method
  • graphene oxide solution printing-reduction method graphene oxide solution printing-reduction method
  • the object of the present invention is to provide a liquid crystal panel structure containing a functionalized graphene layer, wherein the functionalized graphene layer can simultaneously function as a transparent conductive and a liquid crystal alignment, and the alignment film material is not required to be used for the alignment process.
  • the manufacturing process and the film structure of the liquid crystal panel are greatly simplified.
  • the object of the present invention is to provide a method for preparing a functionalized graphene film, fully utilizing the transparent conductive advantages of graphene, and fully utilizing the surface modification of graphene to impart an alignment effect of graphene on liquid crystal molecules, thereby preparing The functionalized graphene film combines transparent conductivity and alignment.
  • the present invention provides a liquid crystal panel structure including a functionalized graphene layer, comprising an upper substrate and a lower substrate disposed opposite to each other, and a liquid crystal layer disposed between the upper substrate and the lower substrate;
  • a functionalized graphene layer is disposed on a side of the upper substrate adjacent to the liquid crystal layer;
  • the functionalized graphene layer is a functionalized graphene film, and the functionalized graphene film is a graphene surface grafted liquid crystal vertical alignment molecular film;
  • the material of the liquid crystal layer comprises liquid crystal molecules, and a liquid crystal vertical alignment molecule of the material of the functionalized graphene layer is grafted on the surface of the graphene to vertically align the liquid crystal molecules in the liquid crystal layer.
  • R is m is an integer between 1 and 5
  • n is an integer between 15 and 30.
  • a functionalized graphene layer is disposed on a side of the lower substrate adjacent to the liquid crystal layer, and a surface of the functionalized graphene layer adjacent to one side of the liquid crystal layer is subjected to rubbing treatment to be in the liquid crystal layer
  • the liquid crystal molecules provide a pretilt angle.
  • the side of the lower substrate adjacent to the liquid crystal layer is sequentially provided with an ITO electrode layer and an alignment film layer from bottom to top, and the alignment film layer provides a pretilt angle to liquid crystal molecules in the liquid crystal layer.
  • the upper substrate is a color film substrate
  • the lower substrate is a TFT array substrate.
  • the invention also provides a method for preparing a functionalized graphene film, comprising the following steps:
  • Step 1 Functionalizing graphene oxide: preparing graphene oxide by Hummer's method, reacting the obtained graphene oxide with a liquid crystal perpendicular alignment molecule having a liquid crystal alignment function, and grafting the vertical alignment molecule on the surface of the graphene oxide to obtain a function.
  • Step 2 forming a functionalized graphene oxide film: providing a solvent, mixing the functionalized graphene prepared in the step 1 in a solvent, and performing ultrasonic treatment to obtain a uniformly dispersed functionalized graphene oxide dispersion; providing a substrate; Forming a functionalized graphene oxide film on the substrate on the functionalized graphene oxide dispersion;
  • Step 3 Reducing the functionalized graphene oxide: the functionalized graphene oxide film obtained in the step 2 is subjected to hydrogen reduction treatment to obtain a functionalized graphene film whose material is a graphene surface grafted liquid crystal vertical alignment molecule.
  • R is m is an integer between 1 and 5
  • n is an integer between 15 and 30.
  • the solvent provided in the step 2 is acetonitrile, acetone, tetrahydrofuran, N-methylpyrrolidone, water, acetone, ethanol, N,N-dimethylformamide, dichloromethane, chloroform, propanol, isopropyl
  • acetone acetone
  • tetrahydrofuran N-methylpyrrolidone
  • water acetone
  • ethanol ethanol
  • N,N-dimethylformamide dichloromethane
  • chloroform chloroform
  • propanol isopropyl
  • One or more mixed solvents of alcohol and ethylene glycol isopropyl
  • the step 3 further includes subjecting the obtained functionalized graphene film to a rubbing treatment.
  • the functionalized graphene oxide dispersion is formed on the substrate by a method of inkjet printing or transfer to form a functionalized graphene oxide film.
  • the invention also provides a method for preparing a functionalized graphene film, comprising the following steps:
  • Step 1 Functionalizing graphene oxide: preparing graphene oxide by Hummer's method, reacting the obtained graphene oxide with a liquid crystal perpendicular alignment molecule having a liquid crystal alignment function, and grafting the vertical alignment molecule on the surface of the graphene oxide to obtain a function.
  • Step 2 forming a functionalized graphene oxide film: providing a solvent, mixing the functionalized graphene prepared in the step 1 in a solvent, and performing ultrasonic treatment to obtain a uniformly dispersed functionalized graphene oxide dispersion; providing a substrate; Forming a functionalized graphene oxide film on the substrate on the functionalized graphene oxide dispersion;
  • Step 3 Reducing the functionalized graphene oxide: performing the hydrogenation reduction treatment on the functionalized graphene oxide film prepared in the step 2 to obtain a functionalized graphene film whose material is a graphene surface grafted liquid crystal vertical alignment molecule;
  • R is m is an integer between 1 and 5, and n is an integer between 15 and 30;
  • the solvent provided in the step 2 is acetonitrile, acetone, tetrahydrofuran, N-methylpyrrolidone, water, acetone, ethanol, N,N-dimethylformamide, dichloromethane, chloroform, propanol, One or more mixed solvents of isopropyl alcohol and ethylene glycol.
  • the invention has the beneficial effects that the functionalized graphene layer-containing liquid crystal panel structure of the invention can simultaneously function as a transparent conductive layer and a liquid crystal alignment, and the alignment film material is not required to be aligned later.
  • the process greatly simplifies the manufacturing process and film structure of the liquid crystal panel.
  • the method for preparing the functionalized graphene film of the invention firstly prepares graphene oxide by Hummer's method, and reacts the functional group on the surface of the graphene oxide with a liquid crystal vertical alignment molecule having a liquid crystal alignment function to obtain functionalized graphene oxide, and then The obtained functionalized graphene oxide is formed into a film to obtain a functionalized graphene oxide film, and then other oxygen-containing functional groups on the functionalized graphene oxide film are reduced, thereby obtaining functionalization of the material as a graphene surface grafted liquid crystal vertical alignment molecule.
  • Graphene film this method makes full use of the transparent conductive advantages of graphene, and makes full use of the surface modification of graphene to impart the alignment effect of graphene on liquid crystal molecules.
  • the functionalized graphene film prepared is transparent and conductive. And the matching function will also play a more obvious advantage in the fields of flexible display and transparent display in the future.
  • FIG. 1 is a schematic structural view of a first embodiment of a liquid crystal panel structure containing a functionalized graphene layer according to the present invention
  • FIG. 2 is a schematic structural view of a second embodiment of a liquid crystal panel structure containing a functionalized graphene layer according to the present invention
  • FIG. 3 is a schematic flow chart of a method for preparing a functionalized graphene film of the present invention
  • FIG. 4 is a schematic diagram showing the reaction of graphene oxide in step 1 of the method for preparing a functionalized graphene film of the present invention
  • step 3 is a functionalized oxygen reduction in step 3 of the method for preparing a functionalized graphene film of the present invention.
  • FIG. 1 is a schematic structural view of a first embodiment of a liquid crystal panel structure including a functionalized graphene layer according to the present invention.
  • the liquid crystal panel structure including the functionalized graphene layer of the present embodiment includes a relatively disposed upper substrate 10 and The lower substrate 20 and the liquid crystal layer 30 provided between the upper substrate 10 and the lower substrate 20.
  • a functionalized graphene layer 40 is disposed on a side of the upper substrate 10 adjacent to the liquid crystal layer 30.
  • the functionalized graphene layer 40 is a functionalized graphene film
  • the functionalized graphene film is a graphene surface grafted liquid crystal vertical alignment molecular film.
  • the material of the liquid crystal layer 30 includes liquid crystal molecules 31 in which liquid crystal vertical alignment molecules are grafted on the surface of the graphene to vertically align the liquid crystal molecules 31 in the liquid crystal layer 30. Orientation.
  • the molecular structural formula of the liquid crystal vertical alignment molecule is
  • R is m is an integer between 1 and 5, and n is an integer between 15 and 30; preferably, m is an integer between 2 and 4, and n is an integer between 16 and 24.
  • liquid crystal vertical alignment molecules in the functionalized graphene form a shape with the graphene
  • the silicon oxide bond (Si-O) is grafted onto the surface of the graphene.
  • the lower substrate 20 is the same as the upper substrate 10, and the functionalized graphene layer 40 is also disposed on a side close to the liquid crystal layer 30, and the functionalized graphene layer 40 is The surface near one side of the liquid crystal layer 30 is subjected to a rubbing treatment to provide a pretilt angle to the liquid crystal molecules 31 in the liquid crystal layer 30.
  • the upper substrate 10 is a color filter substrate
  • the lower substrate 20 is a TFT array substrate.
  • FIG. 2 is a schematic structural view of a second embodiment of a liquid crystal panel structure including a functionalized graphene layer according to the present invention.
  • the upper substrate 10 is adjacent to the first embodiment.
  • One side of the liquid crystal layer 30 is provided with a functionalized graphene layer 40, and the side of the lower substrate 20 adjacent to the liquid crystal layer 30 is provided with an ITO electrode layer 51 and an alignment film layer 52 in this order from bottom to top.
  • the alignment film layer 52 provides a pretilt angle to the liquid crystal molecules 31 in the liquid crystal layer 30.
  • the functionalized graphene layer 40 can simultaneously function as a transparent conductive layer and a liquid crystal alignment, and the alignment film material is not required to be used for the alignment process, which greatly simplifies the liquid crystal.
  • the present invention also provides a method for preparing a functionalized graphene film, comprising the following steps:
  • Step 1 Functionalization of graphene oxide: Graphene oxide is prepared by Hummer's method, and graphene oxide is reacted with liquid crystal alignment function with liquid crystal alignment function to graft vertical alignment molecules on the surface of graphene oxide to obtain functional oxidation. Graphene.
  • the molecular structural formula of the liquid crystal vertical alignment molecule is
  • R is m is an integer between 1 and 5, and n is an integer between 15 and 30; preferably, m is an integer between 2 and 4, and n is an integer between 16 and 24.
  • the liquid crystal vertical alignment molecules react with graphene oxide, and the vertical alignment molecules are grafted on the surface of the graphene oxide by forming a silicon-oxygen bond with the graphene oxide to obtain functionalized graphene oxide.
  • Step 2 forming a functionalized graphene oxide film: providing a solvent, mixing the functionalized graphene prepared in the step 1 in a solvent, and performing ultrasonic treatment to obtain a uniformly dispersed functionalized graphene oxide dispersion; providing a substrate The functionalized graphene oxide dispersion forms a layer of functionalized graphene oxide film on the substrate.
  • the solvent provided in the step 2 is acetonitrile, acetone, tetrahydrofuran, N-methylpyrrolidone, water, acetone, ethanol, N,N-dimethylformamide, dichloromethane, chloroform, propanol
  • acetonitrile acetone
  • tetrahydrofuran N-methylpyrrolidone
  • water acetone
  • ethanol ethanol
  • N,N-dimethylformamide ethanol
  • dichloromethane chloroform
  • propanol One or more mixed solvents of isopropyl alcohol, and ethylene glycol.
  • the functionalized graphene oxide dispersion is formed on the substrate by a method of film formation by inkjet printing or transfer or the like to form a functionalized graphene oxide film.
  • the functionalized graphene oxide dispersion is formed on the substrate by a method of inkjet printing to form a functionalized graphene oxide film.
  • Step 3 Reducting the functionalized graphene oxide: the functionalized graphene oxide film obtained in the step 2 is subjected to hydrogen reduction treatment to obtain a functionalized graphene film.
  • the functionalized graphene oxide film is subjected to a hydrogen reduction treatment to make a carbonyl group (-CO), a carboxyl group (-COOH) on the graphene oxide in the functionalized graphene oxide, And the hydroxyl group (-OH) is reduced to provide more excellent conductivity and transparency of the graphene, wherein the grafted orientated vertical alignment molecules cannot be reduced by hydrogen and remain on the surface of the graphene.
  • the step 3 further comprises performing a rubbing treatment on the obtained functionalized graphene film to thereby provide a pretilt angle to the liquid crystal molecules.
  • the preparation method of the functionalized graphene film of the invention fully utilizes the transparent conductive advantage of graphene, and fully utilizes the surface modification of graphene, imparts the alignment effect of graphene on liquid crystal molecules, and prepares functionalized graphene.
  • the film combines transparent conductivity and alignment function, and will also have more obvious advantages in the fields of flexible display and transparent display in the future.
  • the functionalized graphene layer-containing liquid crystal panel structure of the present invention can simultaneously function as a transparent conductive layer and a liquid crystal alignment, and the alignment film material is not required to be used for the alignment process. , greatly simplifying the manufacturing process and film structure of the liquid crystal panel.
  • the method for preparing the functionalized graphene film of the present invention firstly prepares graphene oxide by Hummer's method, using liquid crystal vertical alignment molecules having liquid crystal alignment function and the surface of graphene oxide The functional group reacts to obtain functionalized graphene oxide, and then the obtained functionalized graphene oxide is formed into a film to obtain a functionalized graphene oxide film, and then the other oxygen-containing functional groups on the functionalized graphene oxide film are reduced to obtain a graphite material.
  • the functionalized graphene film of the surface of the olefin is grafted to the vertical alignment molecule. This method makes full use of the transparent conductivity of graphene, and makes full use of the surface modification of graphene to impart the alignment effect of graphene on liquid crystal molecules.
  • the functionalized graphene film combines transparent conductivity and alignment function, and will also play a more prominent advantage in the fields of flexible display and transparent display in the future.

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Abstract

一种含功能化石墨烯层（40）的液晶面板结构及功能化石墨烯膜的制备方法，该功能化石墨烯层（40）可以同时起到透明导电、及对液晶配向的作用，后续不需要再使用配向膜材料进行配向制程，大大简化了液晶面板的制作工艺及膜层结构。该功能化石墨烯膜的制备方法，充分利用了石墨烯的透明导电优势，并且充分利用了石墨烯的表面可修饰性，赋予石墨烯对液晶分子的配向作用，制备出的功能化石墨烯膜兼具透明导电、及配向功能。

Description

含功能化石墨烯层的液晶面板结构及功能化石墨烯膜的制备方法 技术领域
本发明涉及显示技术领域，尤其涉及一种含功能化石墨烯层的液晶面板结构及功能化石墨烯膜的制备方法。
背景技术
薄膜晶体管液晶显示装置(Liquid Crystal Display，LCD)具有机身薄、省电、无辐射等众多优点，得到了广泛的应用。现有市场上的LCD大部分为背光型液晶显示装置，其包括液晶显示面板及背光模组(backlight module)。液晶显示面板的工作原理是在两片平行的玻璃基板当中放置液晶分子，通过玻璃基板通电与否来控制液晶分子改变方向，将背光模组的光线折射出来产生画面。
通常液晶显示面板由彩膜(Color Filter，CF)基板、薄膜晶体管(Thin Film Transistor，TFT)基板、夹于CF基板与TFT基板之间的液晶(Liquid Crystal，LC)层及密封胶框(Sealant)组成。在TFT-LCD显示器中，基于液晶的运作模式的分类有：相变(phase change，PC)、扭转向列(twisted nematic，TN)、超扭转向列(super twisted nematic，STN)、垂直配向型(Vertical Alignment，VA)、及横向电场切换型(In plane Switching，IPS)等。针对常见的VA显示模式而言，需要在CF基板、TFT基板面向液晶层的一侧上同时分别设置一层透明导电膜，该透明导电膜的主要作用是在CF基板和TFT基板之间形成电场，驱动液晶分子偏转，从而实现亮暗的显示。
目前，传统的透明导电膜是由物理气相溅射(Physical Vapor Deposition，PVD)的方法制备出的氧化铟锡(Indium Tin Oxides，ITO)薄膜。另外，TFT基板及CF基板上ITO透明导电膜形成之后，通常会涂布或打印一层几十至几百纳米厚度的配向膜层，该配向膜与LC接触后，能够使得LC产生一定方向的预倾角，从而给液晶分子提供一个承载的角度(预倾角的大小对TFT-LCD的驱动电压、对比度、响应时间、视角等具有重要影响)，配向膜的材料通常选用聚酰亚胺(Polyimide，PI)材料，主要分为摩擦配向型PI材料和光配向型PI材料，但是，无论哪种配向材料都有各自的缺点。
石墨烯具有优异的透明导电性能和机械性能，目前已有多篇专利报道使用石墨烯作为透明导电膜层。形成石墨性透明导电层的方法可以有直接 化学气相沉积(Chemical Vapor Deposition，CVD)成膜法、CVD成膜-转印法、石墨烯溶液打印法、及氧化石墨烯溶液打印-还原法。然而，在这些专利中，石墨烯仅仅只作为透明电极膜层，而后仍然需要进行配向膜层的材料和工艺。
发明内容
本发明的目的在于提供一种含功能化石墨烯层的液晶面板结构，其功能化石墨烯层可以同时起到透明导电、及对液晶配向的作用，后续不需要使用配向膜材料进行配向制程，大大简化了液晶面板的制作工艺及膜层结构。
本发明的目的还在于提供一种功能化石墨烯膜的制备方法，充分利用石墨烯的透明导电优势，并且充分利用石墨烯的表面可修饰性，赋予石墨烯对液晶分子的配向作用，制备出的功能化石墨烯膜兼具透明导电、及配向功能。
为实现上述目的，本发明提供一种含功能化石墨烯层的液晶面板结构，包括相对设置的上基板与下基板、及设于所述上基板与下基板之间的液晶层；
所述上基板靠近所述液晶层的一侧设有功能化石墨烯层；
所述功能化石墨烯层为功能化石墨烯膜，所述功能化石墨烯膜为石墨烯表面接枝液晶垂直配向分子膜；
所述液晶层的材料包含液晶分子，所述功能化石墨烯层的材料中液晶垂直配向分子接枝在石墨烯表面，以对所述液晶层中液晶分子进行垂直配向。
所述液晶垂直配向分子的分子结构式为
Figure PCTCN2016085794-appb-000001
其中，R为
Figure PCTCN2016085794-appb-000002
Figure PCTCN2016085794-appb-000003
m为1～5之间的整数，n为15～30之间的整数。
可选的，所述下基板靠近所述液晶层的一侧设有功能化石墨烯层，所述功能化石墨烯层靠近所述液晶层的一侧的表面经过摩擦处理，以对液晶层中的液晶分子提供预倾角。
可选的，所述下基板靠近所述液晶层的一侧由下至上依次设有ITO电极层、及配向膜层，所述配向膜层对所述液晶层中的液晶分子提供预倾角。
所述上基板为彩膜基板，所述下基板为TFT阵列基板。
本发明还提供一种功能化石墨烯膜的制备方法，包括以下步骤：
步骤1、使氧化石墨烯功能化：采用Hummer’s法制备氧化石墨烯，将得到的氧化石墨烯与具有液晶配向功能的液晶垂直配向分子反应，使垂直配向分子接枝在氧化石墨烯表面，得到功能化氧化石墨烯；
步骤2、形成功能化氧化石墨烯膜：提供溶剂，将所述步骤1制得的功能化石墨烯混合于溶剂中并通过超声波处理，得到分散均匀的功能化氧化石墨烯分散液；提供基板，将该功能化氧化石墨烯分散液在所述基板上形成一层功能化氧化石墨烯膜；
步骤3、还原功能化氧化石墨烯：将所述步骤2制得的功能化氧化石墨烯膜进行氢气还原处理，得到材料为石墨烯表面接枝液晶垂直配向分子的功能化石墨烯膜。
所述液晶垂直配向分子的分子结构式为
Figure PCTCN2016085794-appb-000004
其中，R为
Figure PCTCN2016085794-appb-000005
Figure PCTCN2016085794-appb-000006
m为1～5之间的整数，n为15～30之间的整数。
所述步骤2中提供的溶剂为乙腈、丙酮、四氢呋喃、N-甲基吡咯烷酮、水、丙酮、乙醇、N,N-二甲基甲酰胺、二氯甲烷、三氯甲烷、丙醇、异丙醇、及乙二醇中的一种或多种混合溶剂。
所述步骤3还包括对得到的功能化石墨烯膜进行摩擦处理。
所述步骤2中通过喷墨打印或转印的方法将所述功能化氧化石墨烯分散液在基板上形成功能化氧化石墨烯膜。
本发明还提供一种功能化石墨烯膜的制备方法，包括以下步骤：
步骤1、使氧化石墨烯功能化：采用Hummer’s法制备氧化石墨烯，将得到的氧化石墨烯与具有液晶配向功能的液晶垂直配向分子反应，使垂直配向分子接枝在氧化石墨烯表面，得到功能化氧化石墨烯；
步骤2、形成功能化氧化石墨烯膜：提供溶剂，将所述步骤1制得的功能化石墨烯混合于溶剂中并通过超声波处理，得到分散均匀的功能化氧化石墨烯分散液；提供基板，将该功能化氧化石墨烯分散液在所述基板上形成一层功能化氧化石墨烯膜；
步骤3、还原功能化氧化石墨烯：将所述步骤2制得的功能化氧化石墨烯膜进行氢气还原处理，得到材料为石墨烯表面接枝液晶垂直配向分子的功能化石墨烯膜；
其中，所述液晶垂直配向分子的分子结构式为
Figure PCTCN2016085794-appb-000007
其中，R为
Figure PCTCN2016085794-appb-000008
Figure PCTCN2016085794-appb-000009
m为1～5之间的整数，n为15～30之间的整数；
其中，所述步骤2中提供的溶剂为乙腈、丙酮、四氢呋喃、N-甲基吡咯烷酮、水、丙酮、乙醇、N,N-二甲基甲酰胺、二氯甲烷、三氯甲烷、丙醇、异丙醇、及乙二醇中的一种或多种混合溶剂。
本发明的有益效果：本发明的含功能化石墨烯层的液晶面板结构，其功能化石墨烯层可以同时起到透明导电、及对液晶配向的作用，后续不需要再使用配向膜材料进行配向制程，大大简化了液晶面板的制作工艺及膜层结构。本发明的功能化石墨烯膜的制备方法，首先通过Hummer’s法制备出氧化石墨烯，利用具有液晶配向功能的液晶垂直配向分子与氧化石墨烯表面上的官能团反应，得到功能化氧化石墨烯，然后将得到的功能化氧化石墨烯进行成膜得到功能化氧化石墨烯膜，再将功能化氧化石墨烯膜上其他含氧官能团还原掉，得到材料为石墨烯表面接枝液晶垂直配向分子的功能化石墨烯膜，该方法充分利用了石墨烯的透明导电优势，并且充分利用了石墨烯表面可修饰性，赋予石墨烯对液晶分子的配向作用，制备出的功能化石墨烯膜兼具透明、导电、及配向功能，在未来柔性显示、及透明显示等领域也将发挥更明显的优势。
附图说明
下面结合附图，通过对本发明的具体实施方式详细描述，将使本发明的技术方案及其它有益效果显而易见。
附图中，
图1为本发明的含功能化石墨烯层的液晶面板结构的第一实施例的结构示意图；
图2为本发明的含功能化石墨烯层的液晶面板结构的第二实施例的结构示意图；
图3为本发明的功能化石墨烯膜的制备方法的流程示意图；
图4为本发明的功能化石墨烯膜的制备方法的步骤1中氧化石墨烯功能化的反应示意图；
图5为本发明的功能化石墨烯膜的制备方法的步骤3中还原功能化氧 化石墨烯的反应示意图。
具体实施方式
为更进一步阐述本发明所采取的技术手段极其效果，以下结合本发明的优选实施例及其附图进行详细描述。
请参阅图1，为本发明含功能化石墨烯层的液晶面板结构的第一实施例的结构示意图，本实施例的含功能化石墨烯层的液晶面板结构包括，相对设置的上基板10与下基板20、及设于所述上基板10与下基板20之间的液晶层30。
具体地，所述上基板10靠近所述液晶层30的一侧设有功能化石墨烯层40。
具体地，所述功能化石墨烯层40为功能化石墨烯膜，所述功能化石墨烯膜为石墨烯表面接枝液晶垂直配向分子膜。
具体地，所述液晶层30的材料包含液晶分子31，所述功能化石墨烯层40的材料中液晶垂直配向分子接枝在石墨烯表面，以对所述液晶层30中液晶分子31进行垂直配向。
具体地，所述液晶垂直配向分子的分子结构式为
Figure PCTCN2016085794-appb-000010
其中，R为
Figure PCTCN2016085794-appb-000011
Figure PCTCN2016085794-appb-000012
m为1～5之间的整数，n为15～30之间的整数；优选地，m为2～4之间的整数，n为16～24之间的整数。
具体地，所述功能化石墨烯中液晶垂直配向分子通过与石墨烯之间形 成硅氧键(Si-O)而接枝在石墨烯表面。
具体地，在本实施例中，所述下基板20同所述上基板10一样，靠近所述液晶层30的一侧也设有功能化石墨烯层40，且所述功能化石墨烯层40靠近所述液晶层30的一侧的表面经过摩擦(rubbing)处理，以对液晶层30中的液晶分子31提供预倾角。
具体地，所述上基板10为彩膜基板，所述下基板20为TFT阵列基板。
请参阅图2，为本发明含功能化石墨烯层的液晶面板结构的第二实施例的结构示意图，与上述第一实施例相比，在本实施例中，仅所述上基板10靠近所述液晶层30的一侧设有功能化石墨烯层40，而所述下基板20靠近所述液晶层30的一侧由下至上依次设有ITO电极层51、及配向膜层52，所述配向膜层52对所述液晶层30中的液晶分子31提供预倾角。
本发明的含功能化石墨烯层的液晶面板结构，功能化石墨烯层40可以同时起到透明导电、及对液晶配向的作用，后续不需要再使用配向膜材料进行配向制程，大大简化了液晶面板的制作工艺及膜层结构。
请参阅图3，本发明还提供一种功能化石墨烯膜的制备方法，包括以下步骤：
步骤1、氧化石墨烯功能化：通过Hummer’s法制备得到氧化石墨烯，将氧化石墨烯与具有液晶配向功能的液晶垂直配向分子反应，使垂直配向分子接枝在氧化石墨烯表面，得到功能化氧化石墨烯。
具体地，所述液晶垂直配向分子的分子结构式为
Figure PCTCN2016085794-appb-000013
其中，R为
Figure PCTCN2016085794-appb-000014
Figure PCTCN2016085794-appb-000015
m为1～5之 间的整数，n为15～30之间的整数；优选地，m为2～4之间的整数，n为16～24之间的整数。
具体地，如图4所示，所述液晶垂直配向分子与氧化石墨烯反应，垂直配向分子通过与氧化石墨烯之间形成硅氧键而接枝在氧化石墨烯表面，得到功能化氧化石墨烯。
步骤2、形成功能化氧化石墨烯膜：提供溶剂，将所述步骤1中制得的功能化石墨烯混合于溶剂中并通过超声波处理，得到分散均匀的功能化氧化石墨烯分散液；提供基板，将该功能化氧化石墨烯分散液在所述基板上形成一层功能化氧化石墨烯膜。
具体地，所述步骤2中提供的溶剂为乙腈、丙酮、四氢呋喃、N-甲基吡咯烷酮、水、丙酮、乙醇、N,N-二甲基甲酰胺、二氯甲烷、三氯甲烷、丙醇、异丙醇、及乙二醇中的一种或多种混合溶剂。
具体地，所述步骤2中通过喷墨打印、或转印等成膜的方法将所述功能化氧化石墨烯分散液在基板上形成功能化氧化石墨烯膜。
优选地，所述步骤2中通过喷墨打印的方法将所述功能化氧化石墨烯分散液在基板上形成功能化氧化石墨烯膜。
步骤3、还原功能化氧化石墨烯：将步骤2中制得的功能化氧化石墨烯膜经过氢气还原处理，得到功能化石墨烯膜。
具体地，如图5所示，该步骤3中，对功能化氧化石墨烯膜进行氢气还原处理，使得功能化氧化石墨烯中氧化石墨烯上的羰基(-CO)、羧基(-COOH)、及羟基(-OH)被还原掉，从而提供石墨烯更优异的导电性和透明性，其中接枝的具有配向作用的垂直配向分子不能被氢气还原，保留在石墨烯表面。
具体地，所述步骤3还包括对得到的功能化石墨烯膜进行摩擦处理，从而起到对液晶分子提供预倾角的作用。
本发明的功能化石墨烯膜的制备方法，充分利用了石墨烯的透明导电优势，并且充分利用了石墨烯表面可修饰性，赋予石墨烯对液晶分子的配向作用，制备出的功能化石墨烯膜兼具透明导电、及配向功能，在未来柔性显示、及透明显示等领域也将发挥更明显的优势。
综上所述，本发明的含功能化石墨烯层的液晶面板结构，其功能化石墨烯层可以同时起到透明导电、及对液晶配向的作用，后续不需要再使用配向膜材料进行配向制程，大大简化了液晶面板的制作工艺及膜层结构。本发明的功能化石墨烯膜的制备方法，首先通过Hummer’s法制备出氧化石墨烯，利用具有液晶配向功能的液晶垂直配向分子与氧化石墨烯表面上的 官能团反应，得到功能化氧化石墨烯，然后将得到的功能化氧化石墨烯进行成膜得到功能化氧化石墨烯膜，再将功能化氧化石墨烯膜上其他含氧官能团还原掉，得到材料为石墨烯表面接枝液晶垂直配向分子的功能化石墨烯膜，该方法充分利用了石墨烯的透明导电优势，并且充分利用了石墨烯表面可修饰性，赋予石墨烯对液晶分子的配向作用，制备出的功能化石墨烯膜兼具透明导电、及配向功能，在未来柔性显示、及透明显示等领域也将发挥更明显的优势。
以上所述，对于本领域的普通技术人员来说，可以根据本发明的技术方案和技术构思作出其他各种相应的改变和变形，而所有这些改变和变形都应属于本发明权利要求的保护范围。

Claims (13)

  1. 一种含功能化石墨烯层的液晶面板结构，包括相对设置的上基板与下基板、及设于所述上基板与下基板之间的液晶层；
    所述上基板靠近所述液晶层的一侧设有功能化石墨烯层；
    所述功能化石墨烯层为功能化石墨烯膜，所述功能化石墨烯膜为石墨烯表面接枝液晶垂直配向分子膜；
    所述液晶层的材料包含液晶分子，所述功能化石墨烯层的材料中液晶垂直配向分子接枝在石墨烯表面，以对所述液晶层中液晶分子进行垂直配向。
  2. 如权利要求1所述的含功能化石墨烯层的液晶面板结构，其中，所述液晶垂直配向分子的分子结构式为
    Figure PCTCN2016085794-appb-100001
    其中，R为
    Figure PCTCN2016085794-appb-100002
    Figure PCTCN2016085794-appb-100003
    m为1～5之间的整数，n为15～30之间的整数。
  3. 如权利要求1所述的含功能化石墨烯层的液晶面板结构，其中，所述下基板靠近所述液晶层的一侧设有功能化石墨烯层，所述功能化石墨烯层靠近所述液晶层的一侧的表面经过摩擦处理，以对液晶层中的液晶分子提供预倾角。
  4. 如权利要求1所述的含功能化石墨烯层的液晶面板结构，其中，所述下基板靠近所述液晶层的一侧由下至上依次设有ITO电极层、及配向膜 层，所述配向膜层对所述液晶层中的液晶分子提供预倾角。
  5. 如权利要求1所述的含功能化石墨烯层的液晶面板结构，其中，所述上基板为彩膜基板，所述下基板为TFT阵列基板。
  6. 一种功能化石墨烯膜的制备方法，包括以下步骤：
    步骤1、使氧化石墨烯功能化：采用Hummer’s法制备氧化石墨烯，将得到的氧化石墨烯与具有液晶配向功能的液晶垂直配向分子反应，使垂直配向分子接枝在氧化石墨烯表面，得到功能化氧化石墨烯；
    步骤2、形成功能化氧化石墨烯膜：提供溶剂，将所述步骤1制得的功能化石墨烯混合于溶剂中并通过超声波处理，得到分散均匀的功能化氧化石墨烯分散液；提供基板，将该功能化氧化石墨烯分散液在所述基板上形成一层功能化氧化石墨烯膜；
    步骤3、还原功能化氧化石墨烯：将所述步骤2制得的功能化氧化石墨烯膜进行氢气还原处理，得到材料为石墨烯表面接枝液晶垂直配向分子的功能化石墨烯膜。
  7. 如权利要求6所述的功能化石墨烯膜的制备方法，其中，所述液晶垂直配向分子的分子结构式为
    Figure PCTCN2016085794-appb-100004
    其中，R为
    Figure PCTCN2016085794-appb-100005
    Figure PCTCN2016085794-appb-100006
    m为1～5之间的整数，n为15～30之间的整数。
  8. 如权利要求6所述的功能化石墨烯膜的制备方法，其中，所述步骤2中提供的溶剂为乙腈、丙酮、四氢呋喃、N-甲基吡咯烷酮、水、丙酮、乙醇、N,N-二甲基甲酰胺、二氯甲烷、三氯甲烷、丙醇、异丙醇、及乙二醇 中的一种或多种混合溶剂。
  9. 如权利要求6所述的功能化石墨烯膜的制备方法，其中，所述步骤3还包括对得到的功能化石墨烯膜进行摩擦处理。
  10. 如权利要求6所述的功能化石墨烯膜的制备方法，其中，所述步骤2中通过喷墨打印或转印的方法将所述功能化氧化石墨烯分散液在基板上形成功能化氧化石墨烯膜。
  11. 一种功能化石墨烯膜的制备方法，包括以下步骤：
    步骤1、使氧化石墨烯功能化：采用Hummer’s法制备氧化石墨烯，将得到的氧化石墨烯与具有液晶配向功能的液晶垂直配向分子反应，使垂直配向分子接枝在氧化石墨烯表面，得到功能化氧化石墨烯；
    步骤2、形成功能化氧化石墨烯膜：提供溶剂，将所述步骤1制得的功能化石墨烯混合于溶剂中并通过超声波处理，得到分散均匀的功能化氧化石墨烯分散液；提供基板，将该功能化氧化石墨烯分散液在所述基板上形成一层功能化氧化石墨烯膜；
    步骤3、还原功能化氧化石墨烯：将所述步骤2制得的功能化氧化石墨烯膜进行氢气还原处理，得到材料为石墨烯表面接枝液晶垂直配向分子的功能化石墨烯膜；
    其中，所述液晶垂直配向分子的分子结构式为
    Figure PCTCN2016085794-appb-100007
    其中，R为
    Figure PCTCN2016085794-appb-100008
    Figure PCTCN2016085794-appb-100009
    m为1～5之间的整数，n为15～30之间的整数；
    其中，所述步骤2中提供的溶剂为乙腈、丙酮、四氢呋喃、N-甲基吡 咯烷酮、水、丙酮、乙醇、N,N-二甲基甲酰胺、二氯甲烷、三氯甲烷、丙醇、异丙醇、及乙二醇中的一种或多种混合溶剂。
  12. 如权利要求11所述的功能化石墨烯膜的制备方法，其中，所述步骤3还包括对得到的功能化石墨烯膜进行摩擦处理。
  13. 如权利要求11所述的功能化石墨烯膜的制备方法，其中，所述步骤2中通过喷墨打印或转印的方法将所述功能化氧化石墨烯分散液在基板上形成功能化氧化石墨烯膜。
PCT/CN2016/085794 2016-05-20 2016-06-15 含功能化石墨烯层的液晶面板结构及功能化石墨烯膜的制备方法 Ceased WO2017197691A1 (zh)

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