WO2017190387A1 - 量子点胶水的制作方法、量子点胶水及量子点偏光片 - Google Patents

量子点胶水的制作方法、量子点胶水及量子点偏光片 Download PDF

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Publication number
WO2017190387A1
WO2017190387A1 PCT/CN2016/083386 CN2016083386W WO2017190387A1 WO 2017190387 A1 WO2017190387 A1 WO 2017190387A1 CN 2016083386 W CN2016083386 W CN 2016083386W WO 2017190387 A1 WO2017190387 A1 WO 2017190387A1
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Prior art keywords
quantum dot
water
soluble
glue
layer
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English (en)
French (fr)
Inventor
李冬泽
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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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Priority to US15/106,317 priority Critical patent/US9963621B2/en
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J129/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Adhesives based on hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Adhesives based on derivatives of such polymers
    • C09J129/02—Homopolymers or copolymers of unsaturated alcohols
    • C09J129/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y20/00—Nanooptics, e.g. quantum optics or photonic crystals
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/04—Non-macromolecular additives inorganic
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
    • G02B5/3041—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks
    • G02B5/305—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks including organic materials, e.g. polymeric 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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/011—Nanostructured additives
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B2207/00—Coding scheme for general features or characteristics of optical elements and systems of subclass G02B, but not including elements and systems which would be classified in G02B6/00 and subgroups
    • G02B2207/101—Nanooptics
    • 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
    • G02F2202/00—Materials and properties
    • G02F2202/10—Materials and properties semiconductor
    • G02F2202/108—Materials and properties semiconductor quantum wells

Definitions

  • the invention relates to the field of display technology, in particular to a method for manufacturing quantum dot glue, a quantum dot glue and a quantum dot polarizer.
  • LCDs liquid crystal displays
  • Various consumer electronic products such as digital assistants, digital cameras, notebook computers, and desktop computers have become mainstream in display devices.
  • the main problem to be solved is how to meet the market demand for high color gamut and high color saturated products.
  • Quantum dot materials have the advantages of concentrated luminescence spectrum and high color purity. These advantages can greatly improve the color gamut of LCD displays and improve the color reproduction capability of LCD displays.
  • the commercially available quantum dot TV is the material used in the display field. Best manifestation.
  • the prior art mainly focuses on mixing and packaging quantum dots of an R (red) G (green) B (blue) in an engineering plastic film (QD film) or a glass tube (QD tube), and placing the structure The position between the backlight and the display system is excited by the traditional white light backlight to achieve the purpose of rich color gamut, but whether it is QD film or QD tube structure, the use of quantum dot materials is relatively simple, and also needs to be optical.
  • the protection and packaging of high quality polyethylene terephthalate (PET) film and small aperture glass tube have certain cost and material reliability problems.
  • FIG. 1 it is a schematic structural view of a conventional polarizer, which is arranged in order from top to bottom. a protective film 110, a first pressure sensitive adhesive layer (PSA film) 120, a first protective layer 130, a first polyvinyl alcohol (PVA) adhesive layer 140, a polarizing film 150, and a second polyvinyl alcohol layer 160, a second protective layer 170, a second pressure sensitive adhesive layer 180, and a release film 190.
  • PSA film first pressure sensitive adhesive layer
  • PVA polyvinyl alcohol
  • the most central part of the polarizer is a polarizing film 150, which is usually a polyvinyl alcohol layer containing iodine molecules; however, the polyvinyl alcohol is extremely easily hydrolyzed, and on both sides of the polarizing film 150 in order to protect the physical properties of the polarizing film 150.
  • Compositely protecting the first and second protective layers 130, 170, respectively are all cellulose triacetate (TAC) films having high light transmittance, good water resistance and certain mechanical strength.
  • TAC cellulose triacetate
  • the polarizing film 150 and the first and second protective layers 130 and 170 are respectively bonded by the first and second polyvinyl alcohol layers 140 and 160, and the first and second polyvinyl alcohol layers 140, 160 is coated with polyvinyl alcohol glue.
  • the polarizing film 150 is bonded to the first and second protective layers 130 and 170 by using polyvinyl alcohol glue, it is necessary to use a strong base to the first,
  • the membrane surface of the second protective layer 130, 170 in contact with the polyvinyl alcohol glue is subjected to alkali treatment to improve the hydrophilic property of the surface, and the chemical reaction formula is as follows:
  • the surface thereof is exposed to a hydroxyl group, and an intermolecular hydrogen bond is easily formed with the polyvinyl alcohol glue to reduce the contact angle and enhance the bonding force.
  • the manufacturing process of the polarizer is complicated, the process time is prolonged, and the production cost is increased.
  • the object of the present invention is to provide a method for manufacturing quantum dot glue, which has simple process, and the obtained quantum dot glue can be used for fabricating a quantum dot polarizer and simplifying the process of the quantum dot polarizer.
  • Another object of the present invention is to provide a quantum dot polarizer which is simple in process and can be used in a liquid crystal display device to improve color gamut and display quality.
  • the present invention firstly provides a method for preparing a quantum dot glue, comprising the following steps:
  • Step 1 providing a water-soluble red quantum dot material, a water-soluble green quantum dot material, and a polyvinyl alcohol glue; mixing the water-soluble red quantum dot material, the water-soluble green quantum dot material and the polyvinyl alcohol glue, and dispersing Uniformly, to obtain a quantum dot glue mixture;
  • Step 2 Add an alkaline solution to the quantum dot glue mixture, and adjust the pH to 7 or more to obtain a quantum dot glue.
  • the water-soluble red quantum dot material comprises a red quantum dot and a water-soluble ligand located on a surface of the red quantum dot;
  • the water-soluble green quantum dot material comprises a green quantum dot and a water-soluble ligand on the surface of the green quantum dot;
  • the red quantum dot includes a first core located in the middle and a first outer casing surrounding the first core, and the material of the first core includes one or more of CdSe, Cd 2 SeTe, and InAs;
  • the material of the first outer casing includes one or more of CdS, ZnSe, ZnCdS 2 , ZnS, and ZnO;
  • the green quantum dot includes a second core located in the middle and a second outer casing surrounding the second core, and the material of the second core includes one or more of ZnCdSe 2 , InP, and Cd 2 SSe;
  • the material of the second outer casing includes one or more of CdS, ZnSe, ZnCdS 2 , ZnS, and ZnO;
  • the water-soluble ligand comprises thioglycolic acid, mercaptopropionic acid, mercaptoalanine, decylundecanoic acid, fluorenyl oligo(polyethylene glycol) acid, sugar-functional thiol, and second generation hydroxyl dendron structure
  • thioglycolic acid mercaptopropionic acid
  • mercaptoalanine mercaptoalanine
  • decylundecanoic acid fluorenyl oligo(polyethylene glycol) acid
  • sugar-functional thiol thiol
  • second generation hydroxyl dendron structure One or more of a compound, and glutathione
  • the alkaline solution comprises one or more of an aqueous solution of ethylenediamine, an aqueous solution of triethanolamine, an aqueous solution of trimethylamine, an aqueous solution of diphenylamine, an aqueous solution of hexamethylenetetramine, and an aqueous solution of tetramethylammonium hydroxide;
  • the mass percentage of the sum of the water-soluble red quantum dot material and the water-soluble green quantum dot material is 0.5 wt% to 20 wt%, wherein the water-soluble red quantum dot material
  • the mass ratio to the water-soluble green quantum dot material is 1:20-20:1; the mass percentage of the polyvinyl alcohol is 2 wt% to 10 wt%.
  • the invention also provides a quantum dot glue comprising a water-soluble red quantum dot material, a water-soluble green quantum dot material, a polyvinyl alcohol, a basic compound, and water, and the quantum dot glue has a pH greater than 7.
  • the mass percentage of the sum of the water-soluble red quantum dot material and the water-soluble green quantum dot material is 0.5 wt% to 20 wt%, wherein the mass ratio of the water-soluble red quantum dot material to the water-soluble green quantum dot material is 1 20-20:1; the mass percentage of the polyvinyl alcohol is 2wt% to 10wt%;
  • the water-soluble red quantum dot material comprises a red quantum dot and a water-soluble ligand located on a surface of the red quantum dot;
  • the water-soluble green quantum dot material comprises a green quantum dot and a water-soluble ligand on the surface of the green quantum dot;
  • the red quantum dot includes a first core located in the middle and a first outer casing surrounding the first core, and the material of the first core includes one or more of CdSe, Cd 2 SeTe, and InAs;
  • the material of the first outer casing includes one or more of CdS, ZnSe, ZnCdS 2 , ZnS, and ZnO;
  • the green quantum dot includes a second core located in the middle and a second outer casing surrounding the second core, and the material of the second core includes one or more of ZnCdSe 2 , InP, and Cd 2 SSe;
  • the material of the second outer casing includes one or more of CdS, ZnSe, ZnCdS 2 , ZnS, and ZnO;
  • the water-soluble ligand comprises thioglycolic acid, mercaptopropionic acid, mercaptoalanine, decylundecanoic acid, fluorenyl oligo(polyethylene glycol) acid, sugar-functional thiol, and second generation hydroxyl dendron structure
  • thioglycolic acid mercaptopropionic acid
  • mercaptoalanine mercaptoalanine
  • decylundecanoic acid fluorenyl oligo(polyethylene glycol) acid
  • sugar-functional thiol thiol
  • second generation hydroxyl dendron structure One or more of a compound, and glutathione
  • the basic compound includes one or more of ethylenediamine, triethanolamine, trimethylamine, diphenylamine, hexamethylenetetramine, and tetramethylammonium hydroxide.
  • the invention also provides a quantum dot polarizer comprising a quantum dot glue layer; the quantum dot glue layer is coated by a quantum dot glue, the quantum dot glue comprises a water soluble red quantum dot material, a water soluble green quantum dot A material, polyvinyl alcohol, a basic compound, and water, and the quantum dot glue has a pH greater than 7.
  • the quantum dot polarizer comprises a surface protective film, a first pressure sensitive adhesive layer, a first protective layer, a quantum dot layer, a polarizing film, a bonding layer, a second protective layer, and a second pressure disposed in order from top to bottom. Sensitive layer, and release film.
  • the quantum dot polarizer comprises a surface protective film disposed in order from top to bottom, a first pressure sensitive adhesive layer, a first protective layer, a quantum dot layer, a first bonding layer, a polarizing film, a second bonding layer, a second protective layer, a second pressure sensitive adhesive layer, and a release film.
  • the quantum dot polarizer includes a surface protective film, a first pressure sensitive adhesive layer, a third protective layer, a quantum dot layer, a first protective layer, a first adhesive layer, a polarizing film, and a surface layer disposed in order from top to bottom. a second adhesive layer, a second protective layer, a second pressure-sensitive adhesive layer, and a release film.
  • the mass percentage of the sum of the water-soluble red quantum dot material and the water-soluble green quantum dot material is 0.5 wt% to 20 wt%, wherein the mass ratio of the water-soluble red quantum dot material to the water-soluble green quantum dot material is 1 20-20:1; the mass percentage of the polyvinyl alcohol is 2wt% to 10wt%;
  • the water-soluble red quantum dot material comprises a red quantum dot and a water-soluble ligand located on a surface of the red quantum dot;
  • the water-soluble green quantum dot material comprises a green quantum dot and a water-soluble ligand on the surface of the green quantum dot;
  • the red quantum dot includes a first core located in the middle and a first outer casing surrounding the first core, and the material of the first core includes one or more of CdSe, Cd 2 SeTe, and InAs;
  • the material of the first outer casing includes one or more of CdS, ZnSe, ZnCdS 2 , ZnS, and ZnO;
  • the green quantum dot includes a second core located in the middle and a second outer casing surrounding the second core, and the material of the second core includes one or more of ZnCdSe 2 , InP, and Cd 2 SSe;
  • the material of the second outer casing comprises one or more of CdS, ZnSe, ZnCdS 2 , ZnS, and ZnO;
  • the water-soluble ligand comprises thioglycolic acid, mercaptopropionic acid, mercaptoalanine, decylundecanoic acid, fluorenyl oligo(polyethylene glycol) acid, sugar-functional thiol, and second generation hydroxyl dendron structure
  • thioglycolic acid mercaptopropionic acid
  • mercaptoalanine mercaptoalanine
  • decylundecanoic acid fluorenyl oligo(polyethylene glycol) acid
  • sugar-functional thiol thiol
  • second generation hydroxyl dendron structure One or more of a compound, and glutathione
  • the basic compound includes one or more of ethylenediamine, triethanolamine, trimethylamine, diphenylamine, hexamethylenetetramine, and tetramethylammonium hydroxide.
  • the quantum dot layer has a thickness of 0.5 ⁇ m to 200 ⁇ m.
  • the invention has the beneficial effects that the quantum dot glue provided by the invention is prepared by adding a water-soluble quantum dot material in polyvinyl alcohol glue and adjusting the pH value to 7 or more by using an alkaline solution to obtain a quantum dot glue.
  • the process is simple, and the obtained quantum dot glue can be used for making quantum dot polarizers.
  • the quantum dot polarizer provided by the invention adds a quantum dot glue layer coated by quantum dot glue, and since the quantum dot glue itself is alkaline, the alkali treatment process on the adhesive layer is omitted, and the direct coating is performed. That is, the process of the quantum dot polarizer is simplified, and the color gamut and display quality of the display device are improved by adding the quantum dot material.
  • FIG. 1 is a schematic structural view of a conventional polarizer
  • FIG. 2 is a flow chart of a method for preparing a quantum dot glue of the present invention
  • FIG. 3 is a schematic structural view of a first embodiment of a quantum dot polarizer of the present invention.
  • FIG. 4 is a schematic structural view of a second embodiment of a quantum dot polarizer of the present invention.
  • Figure 5 is a schematic view showing the structure of a third embodiment of the quantum dot polarizer of the present invention.
  • the present invention first provides a method for preparing a quantum dot glue, comprising the following steps:
  • Step 1 Providing a water-soluble red quantum dot material, a water-soluble green quantum dot material, and a polyethylene The enol glue; mixing the water-soluble red quantum dot material, the water-soluble green quantum dot material and the polyvinyl alcohol glue, and dispersing uniformly to obtain a quantum dot glue mixture.
  • the water-soluble red quantum dot material comprises a red quantum dot and a water-soluble ligand located on a surface of the red quantum dot;
  • the water-soluble green quantum dot material comprises a green quantum dot and a water-soluble ligand located on a surface of the green quantum dot .
  • the red quantum dots and the green quantum dots are quantum dots having a core-shell structure.
  • the red quantum dot includes a first core located in the middle and a first outer casing surrounding the first core, and the material of the first core includes one or more of CdSe, Cd 2 SeTe, and InAs
  • the material of the first outer casing includes one or more of CdS, ZnSe, ZnCdS 2 , ZnS, and ZnO.
  • the green quantum dot includes a second core located in the middle and a second outer casing surrounding the second core, and the material of the second core includes one of ZnCdSe 2 , InP, and Cd 2 SSe or A plurality of materials of the second outer casing include one or more of CdS, ZnSe, ZnCdS 2 , ZnS, and ZnO.
  • the water-soluble ligand includes Mercaptoacetic acid, 3-Mercaptopropionic acid, Cysteine, Mercaptoundecanoic acid, and sulfhydryl oligomeric (polyethylidene) Mercaptoalkyl oligo (ethylene glycol) carboxylic acid, sugar-functionalized thiol, second-generation hydroxyl dendron structural compound (G2-OH Dendron), and glutathione (G) One or more of Glutathione, GSH).
  • the structural formula of the thioglycolic acid is The structural formula of the mercaptopropionic acid is The structural formula of the decyl alanine is The structural formula of the decylundecanoic acid is The structural formula of the fluorenyl oligo(polyethylene glycol) acid is The structural formula of the sugar-functionalized mercaptan is The structural formula of the second-generation hydroxyl dendron structural compound is The structural formula of the glutathione is
  • the polyvinyl alcohol glue comprises polyvinyl alcohol and water, wherein the polyvinyl alcohol has a mass percentage of 4% by weight to 12% by weight.
  • Step 2 Add an alkaline solution to the quantum dot glue mixture to adjust the pH to above 7 to obtain a quantum dot glue.
  • the mass percentage of the sum of the water-soluble red quantum dot material and the water-soluble green quantum dot material is 0.5 wt% to 20 wt%, wherein the water-soluble red color
  • the mass ratio of the quantum dot material to the water-soluble green quantum dot material is 1:20-20:1; the mass percentage of the polyvinyl alcohol is 2wt%-10wt%.
  • the alkaline solution includes one or more of an aqueous solution of ethylenediamine, an aqueous solution of triethanolamine, an aqueous solution of trimethylamine, an aqueous solution of diphenylamine, an aqueous solution of hexamethylenetetramine, and an aqueous solution of tetramethylammonium hydroxide.
  • the invention further provides a quantum dot glue, comprising a water-soluble red quantum dot material, a water-soluble green quantum dot material, a polyvinyl alcohol, a basic compound, and water, and the quantum dot is based on the preparation method of the quantum dot glue described above.
  • the pH of the glue is greater than 7.
  • the mass percentage of the sum of the water-soluble red quantum dot material and the water-soluble green quantum dot material is 0.5 wt% to 20 wt%, wherein the water-soluble red quantum dot material is soluble in water.
  • the mass ratio of the green quantum dot material is 1:20-20:1; the mass percentage of the polyvinyl alcohol is 2wt%-10wt%.
  • the water-soluble red quantum dot material comprises a red quantum dot and a water-soluble ligand located on a surface of the red quantum dot;
  • the water-soluble green quantum dot material comprises a green quantum dot and a water-soluble ligand located on a surface of the green quantum dot .
  • the red quantum dots and the green quantum dots are quantum dots having a core-shell structure.
  • the red quantum dot includes a first core located in the middle and a first outer casing surrounding the first core, and the material of the first core includes one or more of CdSe, Cd 2 SeTe, and InAs
  • the material of the first outer casing includes one or more of CdS, ZnSe, ZnCdS 2 , ZnS, and ZnO.
  • the green quantum dot includes a second core located in the middle and a second outer casing surrounding the second core, and the material of the second core includes one of ZnCdSe 2 , InP, and Cd 2 SSe or A plurality of materials of the second outer casing include one or more of CdS, ZnSe, ZnCdS 2 , ZnS, and ZnO.
  • the water-soluble ligand comprises thioglycolic acid, mercaptopropionic acid, mercaptoalanine, decylundecanoic acid, fluorenyl oligo(polyethylene glycol) acid, sugar-functional thiol, and second generation hydroxylation
  • thioglycolic acid mercaptopropionic acid
  • mercaptoalanine mercaptoalanine
  • decylundecanoic acid fluorenyl oligo(polyethylene glycol) acid
  • sugar-functional thiol a basic structural compound
  • glutathione the structure of each compound has been described in detail above and will not be described herein.
  • the basic compound includes one or more of ethylenediamine, triethanolamine, trimethylamine, diphenylamine, hexamethylenetetramine, and tetramethylammonium hydroxide.
  • the present invention provides a quantum dot polarizer comprising a surface protection film 11 disposed in order from top to bottom, a first pressure sensitive adhesive layer 12, a first protective layer 13, and quantum dots. a glue layer 20, a polarizing film 15, an adhesive layer 16, a second protective layer 17, a second pressure-sensitive adhesive layer 18, and a release film 19;
  • the quantum dot glue layer 20 is coated by a quantum dot glue, and the quantum dot glue comprises a water-soluble red quantum dot material, a water-soluble green quantum dot material, a polyvinyl alcohol, a basic compound, and water, and the The quantum dot glue has a pH greater than 7.
  • the mass percentage of the sum of the water-soluble red quantum dot material and the water-soluble green quantum dot material is 0.5 wt% to 20 wt%, wherein the water-soluble red quantum dot material is soluble in water.
  • the mass ratio of the green quantum dot material is 1:20-20:1; the mass percentage of the polyvinyl alcohol is 2wt%-10wt%.
  • the water-soluble red quantum dot material comprises a red quantum dot and a water-soluble ligand located on a surface of the red quantum dot;
  • the water-soluble green quantum dot material comprises a green quantum dot and a water-soluble ligand located on a surface of the green quantum dot .
  • the red quantum dots and the green quantum dots are quantum dots having a core-shell structure.
  • the red quantum dot includes a first core located in the middle and a first outer casing surrounding the first core, and the material of the first core includes one or more of CdSe, Cd 2 SeTe, and InAs
  • the material of the first outer casing includes one or more of CdS, ZnSe, ZnCdS 2 , ZnS, and ZnO.
  • the green quantum dot includes a second core located in the middle and a second outer casing surrounding the second core, and the material of the second core includes one of ZnCdSe 2 , InP, and Cd 2 SSe or A plurality of materials of the second outer casing include one or more of CdS, ZnSe, ZnCdS 2 , ZnS, and ZnO.
  • the water-soluble ligand comprises thioglycolic acid, mercaptopropionic acid, mercaptoalanine, decylundecanoic acid, fluorenyl oligo(polyethylene glycol) acid, sugar-functional thiol, and second generation hydroxylation
  • thioglycolic acid mercaptopropionic acid
  • mercaptoalanine mercaptoalanine
  • decylundecanoic acid fluorenyl oligo(polyethylene glycol) acid
  • sugar-functional thiol a basic structural compound
  • glutathione the structure of each compound has been described in detail above and will not be described herein.
  • the basic compound includes one or more of ethylenediamine, triethanolamine, trimethylamine, diphenylamine, hexamethylenetetramine, and tetramethylammonium hydroxide.
  • the quantum dot layer 20 has a thickness of 0.5 ⁇ m to 200 ⁇ m.
  • the polarizing film 15 is a polyvinyl alcohol film containing iodine molecules; the bonding layer 16 is a polyvinyl alcohol layer, and the polyvinyl alcohol layer is coated with polyvinyl alcohol glue.
  • the first and second protective layers 13 and 17 are all a cellulose triacetate film, and the cellulose triacetate film has high light transmittance, good water resistance and mechanical strength, and can be used for the polarizing film 15 . protection.
  • the above quantum dot polarizer replaces the conventional polyvinyl alcohol layer by using the quantum dot layer 20, and since the quantum dot layer 20 itself is alkaline, the alkali treatment process of the first protective layer 13 is omitted, and the direct coating is performed.
  • the cloth can be used to simplify the process; at the same time, by adding quantum dot materials, the color gamut and display quality of the display device are improved.
  • the present invention further provides another quantum dot polarizer, comprising a surface protection film 11 disposed in order from top to bottom, a first pressure sensitive adhesive layer 12, a first protective layer 13, a quantum dot layer 20, a first bonding layer 14, a polarizing film 15, a second bonding layer 16, a second protective layer 17, a second pressure-sensitive adhesive layer 18, and a release film 19;
  • the quantum dot glue layer 20 is coated by a quantum dot glue, and the quantum dot glue comprises a water-soluble red quantum dot material, a water-soluble green quantum dot material, a polyvinyl alcohol, a basic compound, and water, and the The quantum dot glue has a pH greater than 7.
  • the component content and material selection in the quantum dot glue water are the same as those in the above embodiment, and are not described herein again.
  • the quantum dot layer 20 has a thickness of 0.5 ⁇ m to 200 ⁇ m.
  • the polarizing film 15 is a polyvinyl alcohol film containing iodine molecules; the first bonding layer 14 and the second bonding layer 16 are each a polyvinyl alcohol layer, and the polyvinyl alcohol layer is composed of Polyvinyl alcohol glue coated.
  • the first and second protective layers 13 and 17 are all cellulose triacetate films.
  • the first protective layer 13 is omitted.
  • the alkali treatment process can be directly coated, and the simplification of the process is realized.
  • the first protective layer 13 and the polarizing film 15 are bonded by using the two layers of the quantum dot layer 20 and the first bonding layer 14 , The adhesion between the first protective layer 13 and the polarizing film 15 is enhanced, and the color gamut and display quality of the display device are improved by adding the quantum dot material.
  • the present invention further provides a quantum dot polarizer according to the above quantum dot glue, comprising a surface protection film 11 , a first pressure sensitive adhesive layer 12 , a third protective layer 40 , which are disposed in order from top to bottom.
  • a quantum dot layer 20 a first protective layer 13, a first bonding layer 14, a polarizing film 15, a second bonding layer 16, a second protective layer 17, a second pressure-sensitive adhesive layer 18, and a release film 19;
  • the quantum dot glue layer 20 is coated by a quantum dot glue, and the quantum dot glue comprises a water-soluble red quantum dot material, a water-soluble green quantum dot material, a polyvinyl alcohol, a basic compound, and water, and the The quantum dot glue has a pH greater than 7.
  • the component content and material selection of the quantum dot glue are the same as those of the above embodiment, and are not described herein again.
  • the quantum dot layer 20 has a thickness of 0.5 ⁇ m to 200 ⁇ m.
  • the polarizing film 15 is a polyvinyl alcohol film containing iodine molecules; the first bonding layer 14 and the second bonding layer 16 are each a polyvinyl alcohol layer, and the polyvinyl alcohol layer is composed of The polyvinyl alcohol glue is coated; the first, second, and third protective layers 13, 17, 40 are all cellulose triacetate films.
  • the quantum dot polarizer has a third protective layer 40 added to enhance the protection of the polarizing film 15 and improve the quality of the polarizer, and the quantum protective layer 20 is used for the third protective layer 40. Bonding with the first protective layer 13 , since the quantum dot layer 20 itself is alkaline, the alkali treatment process of the third protective layer 40 and the first protective layer 13 is omitted, and the coating can be directly applied to realize the process. Simplification; at the same time, by adding quantum dot materials, the color gamut and display quality of the display device are improved.
  • the first protective layer 13 and the second protective layer 17 are used for protecting the polarizing film 15, and the outermost surface protection Membrane 11 and release film 19 are used to provide integral chemical and mechanical protection to the quantum dot polarizer.
  • the release film 19 is peeled off to expose the second pressure-sensitive adhesive layer 18, and then the quantum dot polarizer is attached to the liquid crystal display panel through the second pressure-sensitive adhesive layer 18.
  • the quantum dot polarizer of the present invention can be applied to an upper polarizer (color film substrate polarizer) or a lower polarizer (array substrate polarizer) of a liquid crystal display panel; preferably, it is used as a lower polarizer of a liquid crystal display panel, and is matched with The blue backlight is used. Under the illumination of the blue backlight, the red and green light emitted by the red and green quantum dots in the quantum dot polarizer are mixed with the unabsorbed blue light to form white light, which provides high purity for the liquid crystal display panel.
  • the white light source improves the display quality of the liquid crystal display panel; further, the quantum dot polarizer can also be used with other color backlights to improve the color gamut of the liquid crystal display panel.
  • the quantum dot layer 20 is disposed on the side of the polarizing film 15 away from the release film 19, thereby ensuring that the quantum dot layer 20 is not The polarized light passing through the polarizing film 15 is affected.
  • the present invention provides a method for fabricating quantum dot glue, a quantum dot glue, and a quantum dot polarizer.
  • the method for preparing the quantum dot glue of the invention comprises the steps of: adding a water-soluble quantum dot material in a polyvinyl alcohol glue and adjusting the pH value to 7 or more by using an alkaline solution to obtain a quantum dot glue, which has a simple process and is prepared.
  • Quantum dot glue can be used to make quantum dot polarizers.
  • the quantum dot polarizer of the present invention is added with a quantum dot glue layer coated with a quantum dot glue, and since the quantum dot glue itself is alkaline, the alkali treatment process on the layer to be bonded is omitted, and direct coating is performed.
  • the process of the quantum dot polarizer can be simplified, and the color gamut and display quality of the display device can be improved by adding quantum dot materials.

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Abstract

一种量子点胶水的制作方法、量子点胶水及量子点偏光片。该量子点胶水的制作方法，通过在聚乙烯醇胶水中添加水溶性量子点材料，并采用碱性溶液将其pH值调整至7以上，制得量子点胶水，制程简单，制得的量子点胶水可用于制作量子点偏光片。该量子点偏光片，通过添加由量子点胶水涂布而成的量子点胶层(20)，由于量子点胶水本身呈碱性，省去了对被粘合层的碱处理过程，直接涂布即可，使量子点偏光片的制程简化，同时通过添加量子点材料，提升了显示装置的色域和显示品质。

Description

量子点胶水的制作方法、量子点胶水及量子点偏光片 技术领域
本发明涉及显示技术领域，尤其涉及一种量子点胶水的制作方法、量子点胶水及量子点偏光片。
背景技术
随着显示技术的发展，液晶显示器(Liquid Crystal Display，LCD)等平面显示装置因具有高画质、省电、机身薄及应用范围广等优点，而被广泛的应用于手机、电视、个人数字助理、数字相机、笔记本电脑、台式计算机等各种消费性电子产品，成为显示装置中的主流。
对于目前的LCD领域而言，亟待解决的主要问题就是如何满足市场对于高色域、高色饱产品的需求。
量子点材料具有发光光谱集中，色纯度高等优点，利用这些优点可以大幅度提高目前LCD显示器的色域，提高LCD显示器的色彩还原能力,目前市售的量子点电视就是该材料应用于显示领域的最好体现。现有的技术主要集中于将发光波段在R(红)G(绿)B(蓝)的量子点混合封装于工程塑料薄膜(QD film)或玻璃管(QD tube)中，并将该结构置于背光与显示系统之间的位置，以传统白光背光激发，以达到丰富色域的目的，但无论是QD film还是QD tube结构，对于量子点材料的使用手段较为单一，同时也由于需要如光学优质的聚对苯二甲酸乙二醇酯(PET)膜及小孔径玻璃管的保护与封装，存在一定的成本过高以及材料信赖性问题。
在LCD显示领域，偏光片有着不可取代的重要作用，偏振光学是液晶显示的基础，如图1所示，为现有的偏光片的结构示意图，所述偏光片包括从上到下依次设置的表面保护膜(Protective film)110、第一压敏胶层(PSA film)120、第一保护层130、第一聚乙烯醇(PVA)胶层140、偏光膜150、第二聚乙烯醇胶层160、第二保护层170、第二压敏胶层180、及离型膜(Release film)190。具体的，在偏光片贴覆于液晶显示面板之前，离型膜190会被撕掉以暴露出第二压敏胶层180，之后通过第二压敏胶层180将偏光片贴覆于液晶显示面板上。
该偏光片中最核心的部分是偏光膜150，其材料通常为含有碘分子的聚乙烯醇层；但是聚乙烯醇极易水解，为了保护偏光膜150的物理特性，在偏光膜150的两侧分别复合第一、第二保护层130、170进行防护，所述第 一、第二保护层130、170均为具有高光透过率、耐水性好又具有一定机械强度的三醋酸纤维素(TAC)薄膜。所述偏光膜150与第一、第二保护层130、170之间分别通过第一、第二聚乙烯醇胶层140、160进行粘合，所述第一、第二聚乙烯醇层140、160由聚乙烯醇胶水涂布而成，通常情况下，采用聚乙烯醇胶水对偏光膜150与第一、第二保护层130、170进行粘合时，需要采用强碱对所述第一、第二保护层130、170上与聚乙烯醇胶水接触的膜面进行碱处理，以提高其表面亲水性能，化学反应式如下：
Figure PCTCN2016083386-appb-000001
对第一、第二保护层130、170进行碱处理后使其表面暴露羟基，易与聚乙烯醇胶水发生分子间氢键作用，减小接触角，增强结合力。然而，由于增加了碱处理过程，使得偏光片的制作工艺复杂化，延长了制程时间，且增加了生产成本。
发明内容
本发明的目的在于提供一种量子点胶水的制作方法，制程简单，制得的量子点胶水可用于制作量子点偏光片并简化量子点偏光片的制程。
本发明的目的还在于提供一种量子点胶水，可用于制作量子点偏光片，简化量子点偏光片的制程，同时提升显示装置的色域和显示品质。
本发明的目的还在于提供一种量子点偏光片，制程简单，用于液晶显示装置中可提高色域和显示品质。
为实现上述目的，本发明首先提供一种量子点胶水的制备方法，包括如下步骤：
步骤1、提供水溶性红色量子点材料、水溶性绿色量子点材料、及聚乙烯醇胶水；将所述水溶性红色量子点材料、水溶性绿色量子点材料与聚乙烯醇胶水混合在一起，分散均匀，得到量子点胶水混合物；
步骤2、在所述量子点胶水混合物中加入碱性溶液，将其pH值调节至7以上，得到量子点胶水。
所述水溶性红色量子点材料包括红色量子点及位于红色量子点表面的水溶性配体；所述水溶性绿色量子点材料包括绿色量子点及位于绿色量子点表面的水溶性配体；
所述红色量子点包括位于中间的第一内核和包覆于第一内核周围的第一外壳，所述第一内核的材料包括CdSe、Cd2SeTe、及InAs中的一种或多种；所述第一外壳的材料包括CdS、ZnSe、ZnCdS2、ZnS、及ZnO中的一种或多种；
所述绿色量子点包括位于中间的第二内核和包覆于第二内核周围的第二外壳，所述第二内核的材料包括ZnCdSe2、InP、及Cd2SSe中的一种或多种；所述第二外壳的材料包括CdS、ZnSe、ZnCdS2、ZnS、及ZnO中的一种或多种；
所述水溶性配体包括巯基乙酸、巯基丙酸、巯基丙氨酸、巯基十一酸、巯基低聚(聚乙二醇)酸、糖-功能化硫醇、二代羟基树枝化基元结构化合物、及谷胱甘肽中的一种或多种；
所述碱性溶液包括乙二胺水溶液、三乙醇胺水溶液、三甲胺水溶液、二苯胺水溶液、六亚甲基四胺水溶液、以及四甲基氢氧化胺水溶液中的一种或多种；
所述步骤2制得的量子点胶水中，所述水溶性红色量子点材料与水溶性绿色量子点材料的总和的质量百分比为0.5wt％～20wt％，其中，所述水溶性红色量子点材料与水溶性绿色量子点材料的质量比为1：20—20：1；所述聚乙烯醇的质量百分比为2wt％～10wt％。
本发明还提供一种量子点胶水，包括水溶性红色量子点材料、水溶性绿色量子点材料、聚乙烯醇、碱性化合物、及水，且所述量子点胶水的pH值大于7。
所述水溶性红色量子点材料与水溶性绿色量子点材料的总和的质量百分比为0.5wt％～20wt％，其中，所述水溶性红色量子点材料与水溶性绿色量子点材料的质量比为1：20—20：1；所述聚乙烯醇的质量百分比为2wt％～10wt％；
所述水溶性红色量子点材料包括红色量子点及位于红色量子点表面的水溶性配体；所述水溶性绿色量子点材料包括绿色量子点及位于绿色量子点表面的水溶性配体；
所述红色量子点包括位于中间的第一内核和包覆于第一内核周围的第一外壳，所述第一内核的材料包括CdSe、Cd2SeTe、及InAs中的一种或多种；所述第一外壳的材料包括CdS、ZnSe、ZnCdS2、ZnS、及ZnO中的一种或多种；
所述绿色量子点包括位于中间的第二内核和包覆于第二内核周围的第二外壳，所述第二内核的材料包括ZnCdSe2、InP、及Cd2SSe中的一种或多 种；所述第二外壳的材料包括CdS、ZnSe、ZnCdS2、ZnS、及ZnO中的一种或多种；
所述水溶性配体包括巯基乙酸、巯基丙酸、巯基丙氨酸、巯基十一酸、巯基低聚(聚乙二醇)酸、糖-功能化硫醇、二代羟基树枝化基元结构化合物、及谷胱甘肽中的一种或多种；
所述碱性化合物包括乙二胺、三乙醇胺、三甲胺、二苯胺、六亚甲基四胺、以及四甲基氢氧化胺中的一种或多种。
本发明还提供一种量子点偏光片，包含量子点胶层；所述量子点胶层由量子点胶水涂布而成，所述量子点胶水包括水溶性红色量子点材料、水溶性绿色量子点材料、聚乙烯醇、碱性化合物、及水，且所述量子点胶水的pH值大于7。
所述量子点偏光片包括从上到下依次设置的表面保护膜、第一压敏胶层、第一保护层、量子点胶层、偏光膜、粘接层、第二保护层、第二压敏胶层、及离型膜。
所述量子点偏光片包括从上到下依次设置的表面保护膜、第一压敏胶层、第一保护层、量子点胶层、第一粘接层、偏光膜、第二粘接层、第二保护层、第二压敏胶层、及离型膜。
所述量子点偏光片包括从上到下依次设置的表面保护膜、第一压敏胶层、第三保护层、量子点胶层、第一保护层、第一粘接层、偏光膜、第二粘接层、第二保护层、第二压敏胶层、及离型膜。
所述水溶性红色量子点材料与水溶性绿色量子点材料的总和的质量百分比为0.5wt％～20wt％，其中，所述水溶性红色量子点材料与水溶性绿色量子点材料的质量比为1：20—20：1；所述聚乙烯醇的质量百分比为2wt％～10wt％；
所述水溶性红色量子点材料包括红色量子点及位于红色量子点表面的水溶性配体；所述水溶性绿色量子点材料包括绿色量子点及位于绿色量子点表面的水溶性配体；
所述红色量子点包括位于中间的第一内核和包覆于第一内核周围的第一外壳，所述第一内核的材料包括CdSe、Cd2SeTe、及InAs中的一种或多种；所述第一外壳的材料包括CdS、ZnSe、ZnCdS2、ZnS、及ZnO中的一种或多种；
所述绿色量子点包括位于中间的第二内核和包覆于第二内核周围的第二外壳，所述第二内核的材料包括ZnCdSe2、InP、及Cd2SSe中的一种或多种；所述第二外壳的材料包括CdS、ZnSe、ZnCdS2、ZnS、及ZnO中的一 种或多种；
所述水溶性配体包括巯基乙酸、巯基丙酸、巯基丙氨酸、巯基十一酸、巯基低聚(聚乙二醇)酸、糖-功能化硫醇、二代羟基树枝化基元结构化合物、及谷胱甘肽中的一种或多种；
所述碱性化合物包括乙二胺、三乙醇胺、三甲胺、二苯胺、六亚甲基四胺、以及四甲基氢氧化胺中的一种或多种。
所述量子点胶层的厚度为0.5μm～200μm。
本发明的有益效果：本发明提供的量子点胶水的制作方法，通过在聚乙烯醇胶水中添加水溶性量子点材料，并采用碱性溶液将其pH值调整至7以上，制得量子点胶水，制程简单，制得的量子点胶水可用于制作量子点偏光片。本发明提供的量子点偏光片，通过添加由量子点胶水涂布而成的量子点胶层，由于量子点胶水本身呈碱性，省去了对被粘合层的碱处理过程，直接涂布即可，使量子点偏光片的制程简化，同时通过添加量子点材料，提升了显示装置的色域和显示品质。
为了能更进一步了解本发明的特征以及技术内容，请参阅以下有关本发明的详细说明与附图，然而附图仅提供参考与说明用，并非用来对本发明加以限制。
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为一种现有的偏光片的结构示意图；
图2为本发明的量子点胶水的制备方法的流程图；
图3为本发明的量子点偏光片的第一实施例的结构示意图；
图4为本发明的量子点偏光片的第二实施例的结构示意图；
图5为本发明的量子点偏光片的第三实施例的结构示意图。
具体实施方式
为更进一步阐述本发明所采取的技术手段及其效果，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2，本发明首先提供一种量子点胶水的制备方法，包括如下步骤：
步骤1、提供水溶性红色量子点材料、水溶性绿色量子点材料、及聚乙 烯醇胶水；将所述水溶性红色量子点材料、水溶性绿色量子点材料与聚乙烯醇胶水混合在一起，分散均匀，得到量子点胶水混合物。
具体的，所述水溶性红色量子点材料包括红色量子点及位于红色量子点表面的水溶性配体；所述水溶性绿色量子点材料包括绿色量子点及位于绿色量子点表面的水溶性配体。
优选的，所述红色量子点、绿色量子点均为具有核壳结构的量子点。
具体的，所述红色量子点包括位于中间的第一内核和包覆于第一内核周围的第一外壳，所述第一内核的材料包括CdSe、Cd2SeTe、及InAs中的一种或多种；所述第一外壳的材料包括CdS、ZnSe、ZnCdS2、ZnS、及ZnO中的一种或多种。
具体的，所述绿色量子点包括位于中间的第二内核和包覆于第二内核周围的第二外壳，所述第二内核的材料包括ZnCdSe2、InP、及Cd2SSe中的一种或多种；所述第二外壳的材料包括CdS、ZnSe、ZnCdS2、ZnS、及ZnO中的一种或多种。
具体的，所述水溶性配体包括巯基乙酸(Mercaptoacetic acid)、巯基丙酸(3-Mercaptopropionic acid)、巯基丙氨酸(Cysteine)、巯基十一酸(Mercaptoundecanoic acid)、巯基低聚(聚乙二醇)酸(Mercaptoalkyl oligo(ethylene glycol)carboxylic acid)、糖-功能化硫醇(Suger-Funtionalized thiol)、二代羟基树枝化基元结构化合物(G2-OH Dendron)、及谷胱甘肽(Glutathione，GSH)中的一种或多种。
具体的，所述巯基乙酸的结构式为
Figure PCTCN2016083386-appb-000002
所述巯基丙酸的结构式为
Figure PCTCN2016083386-appb-000003
所述巯基丙氨酸的结构式为
Figure PCTCN2016083386-appb-000004
所述巯基十一酸的结构式为
Figure PCTCN2016083386-appb-000005
所述巯基低聚(聚乙二醇)酸的结构式为
Figure PCTCN2016083386-appb-000006
所述糖-功能化硫醇的结构式为
Figure PCTCN2016083386-appb-000007
所述二代羟基树枝化基元结构化合物的结构 式为
Figure PCTCN2016083386-appb-000008
所述谷胱甘肽的结构式为
Figure PCTCN2016083386-appb-000009
具体的，所述聚乙烯醇胶水包含聚乙烯醇和水，其中，所述聚乙烯醇的质量百分比为4wt％～12wt％。
步骤2、在所述量子点胶水混合物中加入碱性溶液，调节其pH值至7以上，得到量子点胶水。
具体的，所述步骤2制得的量子点胶水中，所述水溶性红色量子点材料与水溶性绿色量子点材料的总和的质量百分比为0.5wt％～20wt％，其中，所述水溶性红色量子点材料与水溶性绿色量子点材料的质量比为1：20—20：1；所述聚乙烯醇的质量百分比为2wt％～10wt％。
具体的，所述碱性溶液包括乙二胺水溶液、三乙醇胺水溶液、三甲胺水溶液、二苯胺水溶液、六亚甲基四胺水溶液、以及四甲基氢氧化胺水溶液中的一种或多种。
基于上述量子点胶水的制备方法，本发明还提供一种量子点胶水，包括水溶性红色量子点材料、水溶性绿色量子点材料、聚乙烯醇、碱性化合物、及水，且所述量子点胶水的pH值大于7。
具体的，所述量子点胶水中，所述水溶性红色量子点材料与水溶性绿色量子点材料的总和的质量百分比为0.5wt％～20wt％，其中，所述水溶性红色量子点材料与水溶性绿色量子点材料的质量比为1：20—20：1；所述聚乙烯醇的质量百分比为2wt％～10wt％。
具体的，所述水溶性红色量子点材料包括红色量子点及位于红色量子点表面的水溶性配体；所述水溶性绿色量子点材料包括绿色量子点及位于绿色量子点表面的水溶性配体。
优选的，所述红色量子点、绿色量子点均为具有核壳结构的量子点。
具体的，所述红色量子点包括位于中间的第一内核和包覆于第一内核 周围的第一外壳，所述第一内核的材料包括CdSe、Cd2SeTe、及InAs中的一种或多种；所述第一外壳的材料包括CdS、ZnSe、ZnCdS2、ZnS、及ZnO中的一种或多种。
具体的，所述绿色量子点包括位于中间的第二内核和包覆于第二内核周围的第二外壳，所述第二内核的材料包括ZnCdSe2、InP、及Cd2SSe中的一种或多种；所述第二外壳的材料包括CdS、ZnSe、ZnCdS2、ZnS、及ZnO中的一种或多种。
具体的，所述水溶性配体包括巯基乙酸、巯基丙酸、巯基丙氨酸、巯基十一酸、巯基低聚(聚乙二醇)酸、糖-功能化硫醇、二代羟基树枝化基元结构化合物、及谷胱甘肽中的一种或多种。各化合物的结构在上文已进行详细描述，此处不再赘述。
具体的，所述碱性化合物包括乙二胺、三乙醇胺、三甲胺、二苯胺、六亚甲基四胺、以及四甲基氢氧化胺中的一种或多种。
请参阅图3，基于上述量子点胶水，本发明提供一种量子点偏光片，包括从上到下依次设置的表面保护膜11、第一压敏胶层12、第一保护层13、量子点胶层20、偏光膜15、粘接层16、第二保护层17、第二压敏胶层18、及离型膜19；
所述量子点胶层20由量子点胶水涂布而成，所述量子点胶水包括水溶性红色量子点材料、水溶性绿色量子点材料、聚乙烯醇、碱性化合物、及水，且所述量子点胶水的pH值大于7。
具体的，所述量子点胶水中，所述水溶性红色量子点材料与水溶性绿色量子点材料的总和的质量百分比为0.5wt％～20wt％，其中，所述水溶性红色量子点材料与水溶性绿色量子点材料的质量比为1：20—20：1；所述聚乙烯醇的质量百分比为2wt％～10wt％。
具体的，所述水溶性红色量子点材料包括红色量子点及位于红色量子点表面的水溶性配体；所述水溶性绿色量子点材料包括绿色量子点及位于绿色量子点表面的水溶性配体。
优选的，所述红色量子点、绿色量子点均为具有核壳结构的量子点。
具体的，所述红色量子点包括位于中间的第一内核和包覆于第一内核周围的第一外壳，所述第一内核的材料包括CdSe、Cd2SeTe、及InAs中的一种或多种；所述第一外壳的材料包括CdS、ZnSe、ZnCdS2、ZnS、及ZnO中的一种或多种。
具体的，所述绿色量子点包括位于中间的第二内核和包覆于第二内核周围的第二外壳，所述第二内核的材料包括ZnCdSe2、InP、及Cd2SSe中的 一种或多种；所述第二外壳的材料包括CdS、ZnSe、ZnCdS2、ZnS、及ZnO中的一种或多种。
具体的，所述水溶性配体包括巯基乙酸、巯基丙酸、巯基丙氨酸、巯基十一酸、巯基低聚(聚乙二醇)酸、糖-功能化硫醇、二代羟基树枝化基元结构化合物、及谷胱甘肽中的一种或多种。各化合物的结构在上文已进行详细描述，此处不再赘述。
具体的，所述碱性化合物包括乙二胺、三乙醇胺、三甲胺、二苯胺、六亚甲基四胺、以及四甲基氢氧化胺中的一种或多种。
具体的，所述量子点胶层20的厚度为0.5μm～200μm。
具体的，所述偏光膜15为含有碘分子的聚乙烯醇薄膜；所述粘接层16为聚乙烯醇胶层，所述聚乙烯醇胶层由聚乙烯醇胶水涂布而成。所述第一、及第二保护层13、17均为三醋酸纤维素薄膜，所述三醋酸纤维素薄膜具有高光透过率、耐水性好、又具有一定机械强度，可以对偏光膜15进行保护。
上述量子点偏光片，通过采用量子点胶层20来取代传统的聚乙烯醇胶层，由于量子点胶层20本身呈碱性，省去了对第一保护层13的碱处理过程，直接涂布即可，实现了制程的简化；同时通过添加量子点材料，提升了显示装置的色域和显示品质。
请参阅图4，基于上述量子点胶水，本发明还提供另一种量子点偏光片，包括从上到下依次设置的表面保护膜11、第一压敏胶层12、第一保护层13、量子点胶层20、第一粘接层14、偏光膜15、第二粘接层16、第二保护层17、第二压敏胶层18、及离型膜19；
所述量子点胶层20由量子点胶水涂布而成，所述量子点胶水包括水溶性红色量子点材料、水溶性绿色量子点材料、聚乙烯醇、碱性化合物、及水，且所述量子点胶水的pH值大于7。
所述量子点胶水中的组分含量及材料选择与上述实施例相同，此处不再赘述。
具体的，所述量子点胶层20的厚度为0.5μm～200μm。
具体的，所述偏光膜15为含有碘分子的聚乙烯醇薄膜；所述第一粘接层14、及第二粘接层16均为聚乙烯醇胶层，所述聚乙烯醇胶层由聚乙烯醇胶水涂布而成。所述第一、第二保护层13、17均为三醋酸纤维素薄膜。
上述量子点偏光片，通过在第一保护层13与第一粘接层14之间添加量子点胶层20，由于量子点胶层20本身呈碱性，省去了对第一保护层13的碱处理过程，直接涂布即可，实现了制程的简化，同时由于采用量子点胶层20与第一粘接层14两层胶层对第一保护层13与偏光膜15进行粘合， 增强了第一保护层13与偏光膜15之间的粘合效果，并且通过添加量子点材料，提升了显示装置的色域和显示品质。
请参阅图5，基于上述量子点胶水，本发明还提供又一种量子点偏光片，包括从上到下依次设置的表面保护膜11、第一压敏胶层12、第三保护层40、量子点胶层20、第一保护层13、第一粘接层14、偏光膜15、第二粘接层16、第二保护层17、第二压敏胶层18、及离型膜19；
所述量子点胶层20由量子点胶水涂布而成，所述量子点胶水包括水溶性红色量子点材料、水溶性绿色量子点材料、聚乙烯醇、碱性化合物、及水，且所述量子点胶水的pH值大于7。
所述量子点胶水中的组分含量及材料选择与以上实施例相同，此处不再赘述。
具体的，所述量子点胶层20的厚度为0.5μm～200μm。
具体的，所述偏光膜15为含有碘分子的聚乙烯醇薄膜；所述第一粘接层14、及第二粘接层16均为聚乙烯醇胶层，所述聚乙烯醇胶层由聚乙烯醇胶水涂布而成；所述第一、第二、及第三保护层13、17、40均为三醋酸纤维素薄膜。
上述量子点偏光片，与传统的偏光片相比，增设了第三保护层40，从而增强对偏光膜15的保护，提升偏光片的品质，同时采用量子点胶层20对第三保护层40与第一保护层13进行粘合，由于量子点胶层20本身呈碱性，省去了对第三保护层40与第一保护层13的碱处理过程，直接涂布即可，实现了制程的简化；同时通过添加量子点材料，提升了显示装置的色域和显示品质。
具体的，上述三个实施例的量子点偏光片中，所述第一保护层13、第二保护层17(和第三保护层40)用于对偏光膜15进行保护，最外侧的表面保护膜11和离型膜19用于对量子点偏光片提供整体性的化学和机械保护。使用时，撕掉离型膜19，以暴露出第二压敏胶层18，然后通过第二压敏胶层18将量子点偏光片贴覆于液晶显示面板上。
本发明的量子点偏光片可适用于液晶显示面板的上偏光片(彩膜基板偏光片)或下偏光片(阵列基板偏光片)；优选的，作为液晶显示面板的下偏光片使用，并搭配蓝色背光使用，在蓝色背光的照射下，所述量子点偏光片中的红、绿色量子点发出的红、绿光与未吸收的蓝光混合形成白光，为液晶显示面板提供纯度较高的白色光源，提高液晶显示面板的显示品质；进一步的，所述量子点偏光片也可搭配其他颜色背光使用，提高液晶显示面板的色域。
基于将量子点偏光片用于下偏光片的用途，本发明的三个实施例中，量子点胶层20均设于偏光膜15远离离型膜19的一侧，保证量子点胶层20不会对穿过所述偏光膜15的偏振光造成影响。
综上所述，本发明提供一种量子点胶水的制作方法、量子点胶水及量子点偏光片。本发明的量子点胶水的制作方法，通过在聚乙烯醇胶水中添加水溶性量子点材料，并采用碱性溶液将其pH值调整至7以上，制得量子点胶水，制程简单，制得的量子点胶水可用于制作量子点偏光片。本发明的量子点偏光片，通过添加由量子点胶水涂布而成的量子点胶层，由于量子点胶水本身呈碱性，省去了对被粘合层的碱处理过程，直接涂布即可，使量子点偏光片的制程简化，同时通过添加量子点材料，提升了显示装置的色域和显示品质。
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 (10)

  1. 一种量子点胶水的制备方法，包括如下步骤：
    步骤1、提供水溶性红色量子点材料、水溶性绿色量子点材料、及聚乙烯醇胶水；将所述水溶性红色量子点材料、水溶性绿色量子点材料与聚乙烯醇胶水混合在一起，分散均匀，得到量子点胶水混合物；
    步骤2、在所述量子点胶水混合物中加入碱性溶液，将其pH值调节至7以上，得到量子点胶水。
  2. 如权利要求1所述的量子点胶水的制备方法，其中，所述水溶性红色量子点材料包括红色量子点及位于红色量子点表面的水溶性配体；所述水溶性绿色量子点材料包括绿色量子点及位于绿色量子点表面的水溶性配体；
    所述红色量子点包括位于中间的第一内核和包覆于第一内核周围的第一外壳，所述第一内核的材料包括CdSe、Cd2SeTe、及InAs中的一种或多种；所述第一外壳的材料包括CdS、ZnSe、ZnCdS2、ZnS、及ZnO中的一种或多种；
    所述绿色量子点包括位于中间的第二内核和包覆于第二内核周围的第二外壳，所述第二内核的材料包括ZnCdSe2、InP、及Cd2SSe中的一种或多种；所述第二外壳的材料包括CdS、ZnSe、ZnCdS2、ZnS、及ZnO中的一种或多种；
    所述水溶性配体包括巯基乙酸、巯基丙酸、巯基丙氨酸、巯基十一酸、巯基低聚(聚乙二醇)酸、糖-功能化硫醇、二代羟基树枝化基元结构化合物、及谷胱甘肽中的一种或多种；
    所述碱性溶液包括乙二胺水溶液、三乙醇胺水溶液、三甲胺水溶液、二苯胺水溶液、六亚甲基四胺水溶液、以及四甲基氢氧化胺水溶液中的一种或多种；
    所述步骤2制得的量子点胶水中，所述水溶性红色量子点材料与水溶性绿色量子点材料的总和的质量百分比为0.5wt％～20wt％，其中，所述水溶性红色量子点材料与水溶性绿色量子点材料的质量比为1：20—20：1；所述聚乙烯醇的质量百分比为2wt％～10wt％。
  3. 一种量子点胶水，包括水溶性红色量子点材料、水溶性绿色量子点材料、聚乙烯醇、碱性化合物、及水，且所述量子点胶水的pH值大于7。
  4. 如权利要求3所述的量子点胶水，其中，所述水溶性红色量子点材 料与水溶性绿色量子点材料的总和的质量百分比为0.5wt％～20wt％，其中，所述水溶性红色量子点材料与水溶性绿色量子点材料的质量比为1：20—20：1；所述聚乙烯醇的质量百分比为2wt％～10wt％；
    所述水溶性红色量子点材料包括红色量子点及位于红色量子点表面的水溶性配体；所述水溶性绿色量子点材料包括绿色量子点及位于绿色量子点表面的水溶性配体；
    所述红色量子点包括位于中间的第一内核和包覆于第一内核周围的第一外壳，所述第一内核的材料包括CdSe、Cd2SeTe、及InAs中的一种或多种；所述第一外壳的材料包括CdS、ZnSe、ZnCdS2、ZnS、及ZnO中的一种或多种；
    所述绿色量子点包括位于中间的第二内核和包覆于第二内核周围的第二外壳，所述第二内核的材料包括ZnCdSe2、InP、及Cd2SSe中的一种或多种；所述第二外壳的材料包括CdS、ZnSe、ZnCdS2、ZnS、及ZnO中的一种或多种；
    所述水溶性配体包括巯基乙酸、巯基丙酸、巯基丙氨酸、巯基十一酸、巯基低聚(聚乙二醇)酸、糖-功能化硫醇、二代羟基树枝化基元结构化合物、及谷胱甘肽中的一种或多种；
    所述碱性化合物包括乙二胺、三乙醇胺、三甲胺、二苯胺、六亚甲基四胺、以及四甲基氢氧化胺中的一种或多种。
  5. 一种量子点偏光片，包含量子点胶层；所述量子点胶层由量子点胶水涂布而成，所述量子点胶水包括水溶性红色量子点材料、水溶性绿色量子点材料、聚乙烯醇、碱性化合物、及水，且所述量子点胶水的pH值大于7。
  6. 如权利要求5所述的量子点偏光片，包括从上到下依次设置的表面保护膜、第一压敏胶层、第一保护层、量子点胶层、偏光膜、粘接层、第二保护层、第二压敏胶层、及离型膜。
  7. 如权利要求5所述的量子点偏光片，包括从上到下依次设置的表面保护膜、第一压敏胶层、第一保护层、量子点胶层、第一粘接层、偏光膜、第二粘接层、第二保护层、第二压敏胶层、及离型膜。
  8. 如权利要求5所述的量子点偏光片，包括从上到下依次设置的表面保护膜、第一压敏胶层、第三保护层、量子点胶层、第一保护层、第一粘接层、偏光膜、第二粘接层、第二保护层、第二压敏胶层、及离型膜。
  9. 如权利要求5所述的量子点偏光片，其中，所述水溶性红色量子点材料与水溶性绿色量子点材料的总和的质量百分比为0.5wt％～20wt％，其 中，所述水溶性红色量子点材料与水溶性绿色量子点材料的质量比为1：20—20：1；所述聚乙烯醇的质量百分比为2wt％～10wt％；
    所述水溶性红色量子点材料包括红色量子点及位于红色量子点表面的水溶性配体；所述水溶性绿色量子点材料包括绿色量子点及位于绿色量子点表面的水溶性配体；
    所述红色量子点包括位于中间的第一内核和包覆于第一内核周围的第一外壳，所述第一内核的材料包括CdSe、Cd2SeTe、及InAs中的一种或多种；所述第一外壳的材料包括CdS、ZnSe、ZnCdS2、ZnS、及ZnO中的一种或多种；
    所述绿色量子点包括位于中间的第二内核和包覆于第二内核周围的第二外壳，所述第二内核的材料包括ZnCdSe2、InP、及Cd2SSe中的一种或多种；所述第二外壳的材料包括CdS、ZnSe、ZnCdS2、ZnS、及ZnO中的一种或多种；
    所述水溶性配体包括巯基乙酸、巯基丙酸、巯基丙氨酸、巯基十一酸、巯基低聚(聚乙二醇)酸、糖-功能化硫醇、二代羟基树枝化基元结构化合物、及谷胱甘肽中的一种或多种；
    所述碱性化合物包括乙二胺、三乙醇胺、三甲胺、二苯胺、六亚甲基四胺、以及四甲基氢氧化胺中的一种或多种。
  10. 如权利要求5所述的量子点偏光片，其中，所述量子点胶层的厚度为0.5μm～200μm。
PCT/CN2016/083386 2016-05-03 2016-05-25 量子点胶水的制作方法、量子点胶水及量子点偏光片 Ceased WO2017190387A1 (zh)

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