CN115232267B - Polymer/nanocrystalline hybrid light guide plate and preparation method thereof - Google Patents
Polymer/nanocrystalline hybrid light guide plate and preparation method thereof Download PDFInfo
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- 229920000642 polymer Polymers 0.000 title claims abstract description 47
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 239000004094 surface-active agent Substances 0.000 claims abstract description 57
- 239000002159 nanocrystal Substances 0.000 claims abstract description 54
- 239000011159 matrix material Substances 0.000 claims abstract description 11
- 239000000178 monomer Substances 0.000 claims abstract description 9
- 239000002243 precursor Substances 0.000 claims description 22
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 238000003756 stirring Methods 0.000 claims description 11
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 9
- 239000003999 initiator Substances 0.000 claims description 8
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 claims description 8
- 238000006116 polymerization reaction Methods 0.000 claims description 8
- 230000000379 polymerizing effect Effects 0.000 claims description 7
- PYGHKJQHDXSHES-UHFFFAOYSA-N undec-10-en-1-amine Chemical compound NCCCCCCCCCC=C PYGHKJQHDXSHES-UHFFFAOYSA-N 0.000 claims description 7
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 claims description 6
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 6
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 6
- 238000009210 therapy by ultrasound Methods 0.000 claims description 6
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 5
- -1 benzyl vinyl octadecyl dimethyl ammonium chloride Chemical compound 0.000 claims description 5
- 238000001556 precipitation Methods 0.000 claims description 5
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 4
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 claims description 4
- KXKVLQRXCPHEJC-UHFFFAOYSA-N acetic acid trimethyl ester Natural products COC(C)=O KXKVLQRXCPHEJC-UHFFFAOYSA-N 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- XSHISXQEKIKSGC-UHFFFAOYSA-N 2-aminoethyl 2-methylprop-2-enoate;hydron;chloride Chemical compound Cl.CC(=C)C(=O)OCCN XSHISXQEKIKSGC-UHFFFAOYSA-N 0.000 claims description 2
- 239000004793 Polystyrene Substances 0.000 claims description 2
- FFFFSBOVKXVMAY-UHFFFAOYSA-M [Cl-].C(=C)[N+](CCC1=CC=CC=C1)(C)CCCCCCCCCCCC Chemical compound [Cl-].C(=C)[N+](CCC1=CC=CC=C1)(C)CCCCCCCCCCCC FFFFSBOVKXVMAY-UHFFFAOYSA-M 0.000 claims description 2
- VXSASNNBOYCZMY-UHFFFAOYSA-M ethenyl-dimethyl-(2-phenylethyl)azanium;chloride Chemical compound [Cl-].C=C[N+](C)(C)CCC1=CC=CC=C1 VXSASNNBOYCZMY-UHFFFAOYSA-M 0.000 claims description 2
- 239000002105 nanoparticle Substances 0.000 claims description 2
- 229920000193 polymethacrylate Polymers 0.000 claims description 2
- 229920005553 polystyrene-acrylate Polymers 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims description 2
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims 3
- 238000005520 cutting process Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 8
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 238000010992 reflux Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000000967 suction filtration Methods 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 238000002715 modification method Methods 0.000 description 2
- YUKQRDCYNOVPGJ-UHFFFAOYSA-N thioacetamide Chemical compound CC(N)=S YUKQRDCYNOVPGJ-UHFFFAOYSA-N 0.000 description 2
- DLFVBJFMPXGRIB-UHFFFAOYSA-N thioacetamide Natural products CC(N)=O DLFVBJFMPXGRIB-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000008096 xylene Substances 0.000 description 2
- BMFMTNROJASFBW-UHFFFAOYSA-N 2-(furan-2-ylmethylsulfinyl)acetic acid Chemical compound OC(=O)CS(=O)CC1=CC=CO1 BMFMTNROJASFBW-UHFFFAOYSA-N 0.000 description 1
- URDOJQUSEUXVRP-UHFFFAOYSA-N 3-triethoxysilylpropyl 2-methylprop-2-enoate Chemical compound CCO[Si](OCC)(OCC)CCCOC(=O)C(C)=C URDOJQUSEUXVRP-UHFFFAOYSA-N 0.000 description 1
- XDLMVUHYZWKMMD-UHFFFAOYSA-N 3-trimethoxysilylpropyl 2-methylprop-2-enoate Chemical compound CO[Si](OC)(OC)CCCOC(=O)C(C)=C XDLMVUHYZWKMMD-UHFFFAOYSA-N 0.000 description 1
- KBQVDAIIQCXKPI-UHFFFAOYSA-N 3-trimethoxysilylpropyl prop-2-enoate Chemical compound CO[Si](OC)(OC)CCCOC(=O)C=C KBQVDAIIQCXKPI-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000003486 chemical etching Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000010147 laser engraving Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- XKMZOFXGLBYJLS-UHFFFAOYSA-L zinc;prop-2-enoate Chemical compound [Zn+2].[O-]C(=O)C=C.[O-]C(=O)C=C XKMZOFXGLBYJLS-UHFFFAOYSA-L 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F292/00—Macromolecular compounds obtained by polymerising monomers on to inorganic materials
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0065—Manufacturing aspects; Material aspects
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- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Materials Engineering (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Inorganic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Polymerisation Methods In General (AREA)
Abstract
The invention relates to a polymer/nanocrystalline hybrid light guide plate and a preparation method thereof, belonging to the technical field of light guide plates. The light guide plate with uniformly dispersed internal nanocrystals is prepared by copolymerizing the nanocrystals modified by the polymerizable surfactant with a polymer monomer, and the nanocrystals and the polymer have a bonding effect. The scattering behavior of the nano crystals uniformly distributed in the polymer/nano crystal light guide plate to light meets Rayleigh scattering law, and finally the polymer/nano crystal hybrid light guide plate presents excellent brightness and uniformity. The polymer/nanocrystalline hybrid light guide plate can realize double-sided light guide and arbitrary cutting. The brightness and uniformity of the light emission can be adjusted by adjusting the concentration of the nanocrystals in the polymer matrix according to the desired size. And the light guide plate is directly formed after being copolymerized with the polymer monomer injected into the die and the nano crystal modified by the polymerizable surfactant, so that the subsequent processing and treatment are not needed, and the manufacturing is simple and convenient.
Description
Technical Field
The invention belongs to the technical field of light guide plates, and particularly relates to a polymer/nanocrystalline hybrid light guide plate and a preparation method thereof.
Background
The light guide plate can convert point light source and linear light source into surface light source. In order to increase the light-emitting efficiency and uniformity on the surface of the light guide plate, light guide dots are usually introduced at the bottom of the light guide plate to improve the performance of the light guide plate, or the light guide plate is made into a wedge shape. However, the current processes for preparing the light guide plate mainly comprise printing, laser engraving, chemical etching, direct injection molding and the like, and the methods generally need complicated professional equipment or precise secondary processes, so that the production cost is greatly increased, and the production efficiency is reduced. In addition, the prepared light guide plate has application defects, such as incapability of random cutting, single-sided light guide and the like, and is difficult to meet the market demands, and the structure and the process of the light guide plate still need to be further innovated.
Disclosure of Invention
The invention aims to provide a polymer/nanocrystalline hybrid light guide plate and a preparation method thereof, wherein the preparation method is simple and convenient, and the prepared light guide plate has high brightness and high uniformity, and overcomes the defects of the prior art.
The preparation method of the polymer/nanocrystalline hybrid light guide plate is characterized by comprising the following steps: mixing 100 parts by mass of monomer, 0.1-10 parts by mass of polymerizable surfactant modified nanocrystalline (or a mixture of polymerizable surfactant modified nanocrystalline and polymerizable surfactant, wherein the dosage of the polymerizable surfactant is 5-20wt% of that of the polymerizable surfactant modified nanocrystalline), and 0.1-2 parts by mass of initiator, performing ultrasonic treatment for 5-10 min, and stirring for 10-60 min to prepare a precursor; pre-polymerizing the precursor at 40-80 ℃ for 1-18 h to a viscous state, then injecting the precursor into a cuboid mould, removing bubbles from the viscous state precursor injected into the mould for 0.5-2 h in vacuum, and continuously polymerizing the precursor at 70-95 ℃ for 15-30 h to obtain the polymer/nanocrystalline hybrid light guide plate.
The polymer/nanocrystal hybrid light guide plate disclosed by the invention is shown in a figure 1, wherein uniformly dispersed polymerizable surfactant modified nanocrystals are contained in the polymer/nanocrystal hybrid light guide plate, and bonding interaction exists between the polymerizable surfactant modified nanocrystals and a polymer matrix of the light guide plate (bonding interaction means that active groups capable of being copolymerized with the polymer matrix exist after the nanocrystals are modified by the polymerizable surfactant), and the polymer matrix and the polymerizable surfactant modified nanocrystals are directly molded after being copolymerized without subsequent processing and treatment; the brightness and uniformity of the light output can be adjusted according to the size of the light guide plate, and the concentration of the nanocrystalline in the polymer matrix.
Preferably, the monomer is one or two of styrene and methyl methacrylate, and the polymer matrix obtained by mixing the two at any proportion is polystyrene and/or polymethacrylate;
preferably, the initiator is one of azodiisoheptonitrile and azodiisobutyronitrile.
Preferably, the nanocrystalline is TiO 2 Nanocrystalline, zrO 2 Nanocrystalline, siO 2 Nanocrystalline, znS nanocrystalline, csPbCl 3 One or more of the nanocrystals.
Preferably, the grain size of the nanocrystals is less than 40nm;
preferably, the light emitting brightness and uniformity of the light guide plate can be controlled by adjusting the concentration of the polymerizable surfactant modified nanocrystals.
Preferably, the thickness of the polymer/nanocrystalline hybrid light guide plate is 0.5-10 mm.
Preferably, the polymerizable surfactant is one of compounds shown in the following structural formula, and specifically is benzyl vinyl octadecyl dimethyl ammonium chloride (A), benzyl vinyl dodecyl dimethyl ammonium chloride (B), dibenzyl vinyl dimethyl ammonium chloride (C), 2-aminoethyl methacrylate hydrochloride (D), benzyl vinyl trimethyl ammonium chloride (E), 1-amino-10-undecene (F), 3- (methacryloxy) propyl trimethoxysilane (G), 3- (methacryloxy) propyl triethoxysilane (H), 3- (acryloxy) propyl trimethoxysilane (I), zinc phenyl acrylate (J), zinc methacrylate (K) and zinc acrylate (L).
In order to enable the nanocrystals to be uniformly dispersed in a polymer matrix and to have polymerizable reactivity, modification of the nanocrystals with polymerizable surfactants is required, and the nanocrystals are classified into three types according to modification methods. Class a: csPbCl 3 A nanocrystalline; class B: tiO (titanium dioxide) 2 、ZrO 2 Or SiO 2 A nanocrystalline; class C: znS nanocrystals.
For the A-type nanocrystalline, one or more polymerizable surfactants with molecular structures shown in formulas A-E are selected, and the modification method is to add 100 parts by mass of nano CsPbCl into toluene, xylene or n-hexane 3 And 5-50 parts by mass of polymerizable surfactant, stirring for 30-60 min, adding isopropanol, methyl acetate or ethyl acetate for reverse precipitation, and performing centrifugal separation to obtain CsPbCl modified by the polymerizable surfactant 3 And (3) nanocrystalline.
For the class A nanocrystals, the following method can also be used for modification: 100 parts by mass of nano CsPbCl 3 Adding 10-30 parts by mass of polymerizable surfactant with molecular structure shown in formula F into n-hexane, toluene or xylene, stirring for 5-60 min, adding isopropanol, methyl acetate or ethyl acetate for reverse precipitation, and centrifuging to obtain CsPbCl modified by polymerizable surfactant with molecular structure shown in formula F 3 A nanocrystalline; subsequently, csPbCl modified by the polymerizable surfactant with the molecular structure shown in the formula F 3 Nanocrystalline, and CsPbCl modified by polymerizable surfactant with respect to molecular structure represented by formula F 3 The polymerizable surfactant with the molecular structure shown in the formulas A-E and with the mass of 5-20% of the nanocrystalline is added into the monomer and the initiator together for polymerization, so that the polymer/nanocrystalline hybrid light guide plate is obtained.
Aiming at B-type nanocrystalline, uniformly dispersing 5-15 parts by mass of one of B-type nanocrystalline and 10-20 parts by mass of one or more polymerizable surfactants with molecular structures shown in formulas G-I in ethanol or mixed solution of ethanol and water by ultrasound; and then heating and refluxing for 5-20 h at 50-80 ℃, and carrying out low-pressure suction filtration after the reaction is finished to prepare the polymerizable surfactant modified B-type nanocrystalline.
For the C-class nanocrystalline, adding 100 mole parts of one of polymerizable surfactants in the molecular structures shown in the formulas J-L and 80-100 mole parts of thioacetamide into N, N-dimethylformamide, heating and reacting for 3-10 h at 50-70 ℃, and distilling under vacuum reduced pressure after the reaction is finished to obtain the polymerizable surfactant modified C-class nanocrystalline.
Drawings
FIG. 1 is a schematic view of a hybrid polymer/nanocrystal light guide plate structure in accordance with the present invention;
as shown in fig. 1, the light guide plate has a rectangular parallelepiped structure with a thickness of 0.5 to 10mm, and the nanocrystals can be uniformly dispersed inside the light guide plate due to the bonding effect of the nanocrystals and the polymer. Light is incident from the side surface of the light guide plate in the form of a linear light source, rayleigh scattering behavior can be generated when the light encounters nanocrystals in the process of conducting in the light guide plate, and part of the light can change the original conducting path and be scattered out from the surface, so that the brightness of the light emitting surface is enhanced.
Fig. 2 is a schematic diagram of the light intensity distribution of the rayleigh scattering behavior of a single nanocrystal in the light guide plate according to the present invention.
As shown in FIG. 2, the scattering behavior of the nanocrystals within the polymer matrix satisfies Rayleigh scattering rule, and when the particle size of the nanocrystals is smaller than one tenth of the wavelength of incident light, the scattering luminous flux of the nanocrystals for light satisfies 1+cos in the direction of the unit solid angle θ 2 θ, the light intensity in the horizontal direction is doubled compared with the light intensity in the vertical direction.
Detailed Description
The following detailed description of the present invention will be made in order to make the foregoing of the present invention more clear and understandable. It will be apparent that the embodiments described below are only a part of the present invention. Based on the embodiments of the present invention, those skilled in the art may implement other related embodiments without making any substantial inventive effort, which fall within the scope of the present invention.
The polymer/nanocrystal hybrid light guide plate has different kinds of homogeneously dispersed nanocrystals inside, and different nanocrystals can modify different polymerizable surfactants. Thus, examples 2-7 illustrate primarily modifications of nanocrystalline polymerizable surfactants. The polymerization forming process of the polymer/nanocrystal hybrid light guide plate is described as embodiment 1.
Example 1
6g of nano CsPbCl 3 And 1.2g of polymerizable surfactant with molecular structure shown in formula A, adding into 120mL of toluene solution, stirring for 1h, adding 480mL of ethyl acetate solvent for reverse precipitation, and centrifuging to obtain CsPbCl modified by polymerizable surfactant 3 The yield of the nanocrystals was about 4.8g.
5g of polymerizable surfactant modified CsPbCl 3 Mixing the nanocrystalline, 80g of styrene and 20g of methyl methacrylate, adding 1g of azodiisobutyronitrile thermal initiator, performing ultrasonic treatment for 10min after mixing, and stirring for 40min to prepare a precursor; pre-polymerizing the precursor at 70 ℃ for 12h to a viscous state, then injecting the precursor into a rectangular die with the length of 55mm, the width of 75mm and the thickness of 5mm, removing bubbles from the viscous state precursor injected into the die under vacuum for 1h, and then raising the temperature to 80 ℃ for continuous polymerization for 20h to obtain the formed polymer/nanocrystalline hybrid light guide plate. Wherein the polymerizable surfactant modified CsPbCl 3 The doping amount of the nanocrystals was 5wt%.
Example 2
3g of nano CsPbCl 3 Adding 0.81g of polymerizable surfactant with molecular structure shown in formula F into 30mL of n-hexane solution, stirring for 0.5h, adding 120mL of methyl acetate for reverse precipitation, and centrifuging to obtain CsPbCl modified by polymerizable surfactant shown in formula F 3 The yield of the nanocrystals was about 1.5g.
450mg CsPbCl modified with polymerizable surfactant of formula F 3 Dissolving the nanocrystalline in 45g of styrene, adding 90mg of polymerizable surfactant with a structure shown in formula C and 45mg of azodiisoheptonitrile thermal initiator, stirring uniformly, prepolymerizing at 60deg.C for 12h to a viscous state, and injecting into a container with a length of 125mm and a width ofAnd (3) in a rectangular die with the thickness of 85mm and 4mm, removing bubbles in vacuum for 1h, and then raising the temperature to 80 ℃ to continue polymerization for 20h to obtain the formed polymer/nanocrystalline hybrid light guide plate. Wherein the polymerizable surfactant modified CsPbCl 3 The doping amount of the nanocrystals was 1.0wt%.
Other amounts of nanocrystals, such as 0.5wt%, 1.5wt%, were also prepared as described in this example, with only CsPbCl nanoparticles added to styrene 3 The quality is changed according to the doping amount.
Example 3
15g of nano TiO 2 And 10G of a polymerizable surfactant having a molecular structure represented by formula G was added to a mixed solution of 10mL of water and 300mL of ethanol, and the mixture was sonicated for 30 minutes to uniformly disperse. Then heating and refluxing for 20 hours at 50 ℃, and after the reaction is finished, carrying out low-pressure suction filtration to prepare the polymerizable surfactant modified TiO 2 The yield of the nanocrystals was about 10g.
3g of polymerizable surfactant modified TiO 2 Adding the nanocrystalline into 100g of methyl methacrylate, adding 1g of azodiisobutyronitrile, mixing, performing ultrasonic treatment for 10min, and stirring for 40min to prepare a precursor; and then pre-polymerizing the precursor for 2 hours at 75 ℃ to a viscous state, then injecting the precursor into a rectangular die with the length of 85mm, the width of 85mm and the thickness of 4mm, removing bubbles in vacuum for 0.5 hour, and then raising the temperature to 95 ℃ for continuous polymerization for 15 hours to obtain the formed polymer/nanocrystalline hybrid light guide plate.
Example 4
10g of nano ZrO 2 Adding into 300mL ethanol solution, adding 10g polymerizable surfactant with structure shown in formula I, and ultrasonic treating for 30min to uniformly disperse. Heating and refluxing for 20h at 50 ℃, and after the reaction is finished, performing low-pressure suction filtration to prepare the ZrO modified by the polymerizable surfactant 2 The yield of the nanocrystals was about 6.7g.
ZrO modification of 1g polymerizable surfactant 2 Adding the nanocrystalline into 100g of methyl methacrylate, adding 0.1g of azodiisobutyronitrile, mixing, performing ultrasonic treatment for 10min, and stirring for 40min to prepare a precursor; the precursor was then prepolymerized at 75deg.C for 2h to a viscous state and injected intoAnd (3) in a rectangular die with the length of 85mm, the width of 85mm and the thickness of 2mm, removing bubbles in vacuum for 0.5h, and then raising the temperature to 95 ℃ for continuous polymerization for 15h to obtain the formed polymer/nanocrystalline hybrid light guide plate.
Example 5
2.35g of polymerizable surfactant with molecular structure shown in formula K and 0.67g of thioacetamide are added into 100mL of N, N-dimethylformamide, heating reaction is carried out for 5 hours at 70 ℃, and vacuum reduced pressure distillation is carried out after the reaction is finished, so that ZnS nanocrystalline modified by the polymerizable surfactant is obtained, and the yield is about 2.6g.
Adding 2.5g of ZnS nano-crystal modified by a polymerizable surfactant into 100g of methyl methacrylate, adding 0.5g of azodiisobutyronitrile, carrying out ultrasonic treatment for 10min after mixing, and stirring for 40min to prepare a precursor; and then pre-polymerizing the precursor for 2 hours to a viscous state at the temperature of 75 ℃, injecting the precursor into a rectangular mold with the length of 85mm, the width of 85mm and the thickness of 3mm, removing bubbles in vacuum for 0.5 hour, and then raising the temperature to 95 ℃ for continuous polymerization for 15 hours to obtain the formed polymer/nanocrystalline hybrid light guide plate.
The light guide plates prepared according to examples 1 to 5 of the present invention have uniform internal particle distribution, and the luminance and uniformity of the light guide plate can be effectively improved as measured by an illuminometer, and the specific properties are shown in table 1 below:
table 1: performance parameters of the light guide plates prepared in examples 1 to 5
Note that: the effect display degree is sequentially from good to bad: good and bad, excellent +, poor
As can be seen from table 1, the light guide plates prepared according to examples 1 to 5 of the present invention have nanocrystals uniformly distributed inside, which can effectively convert a linear light source into a surface light source, and exhibit good uniformity. The excellent light-emitting brightness and uniformity of the polymer/nanocrystal light guide plate benefit from the fact that the scattering behavior of individual nanocrystals in the polymer matrix inside the light guide plate for light satisfies the Rayleigh scattering law. The prepared polymer/nanocrystalline hybrid light guide plate with the thickness of 0.5-10 mm can realize double-sided light guide and random cutting. And the light guide plate is directly formed after being copolymerized with the polymer monomer injected into the die and the nano crystal modified by the polymerizable surfactant, and subsequent processing and treatment are not needed. The brightness and uniformity of the light emission can be adjusted by adjusting the concentration of the nanocrystals in the polymer matrix according to the desired size.
Claims (5)
1. A preparation method of a polymer/nanocrystalline hybrid light guide plate is characterized in that: mixing 100 parts by mass of monomer, 0.1-10 parts by mass of polymerizable surfactant 1-amino-10-undecene modified nanocrystalline or a mixture of polymerizable surfactant 1-amino-10-undecene modified nanocrystalline and polymerizable surfactant, and 0.1-2 parts by mass of initiator, performing ultrasonic treatment for 5-10 min, and stirring for 10-60 min to prepare a precursor; wherein the dosage of the polymerizable surfactant is 5-20wt% of the dosage of the polymerizable surfactant modified nanocrystal; pre-polymerizing the precursor at 40-80 ℃ for 1-18 h to a viscous state, then injecting the precursor into a cuboid mold, removing bubbles from the viscous state precursor injected into the mold in vacuum for 0.5-2 h, and continuously polymerizing the precursor at 70-95 ℃ for 15-30 h to obtain the polymer/nanocrystalline hybrid light guide plate; the monomer is one or two of styrene and methyl methacrylate, and the polymer matrix is polystyrene and/or polymethacrylate; the nanocrystalline is TiO 2 Nanocrystalline, zrO 2 Nanocrystalline, siO 2 Nanocrystalline, znS nanocrystalline, csPbCl 3 One or more of the nanocrystals has a particle size of less than 40 nm.
2. The method for preparing the polymer/nanocrystal hybrid light guide plate as recited in claim 1, wherein: for CsPbCl 3 Nanocrystalline is prepared by mixing 100 parts by mass of CsPbCl nanoparticles 3 Adding 10-30 parts by mass of polymerizable surfactant 1-amino-10-undecene into n-hexane and methylStirring for 5-60 min in benzene or dimethylbenzene, adding isopropanol, methyl acetate or ethyl acetate for reverse precipitation, and performing centrifugal separation to obtain polymerizable surfactant 1-amino-10-undecene modified CsPbCl 3 A nanocrystalline; subsequently, the polymerizable surfactant 1-amino-10-undecene modified CsPbCl is further subjected to 3 Nanocrystalline, and CsPbCl modified with respect to the polymerizable surfactant 1-amino-10-undecene 3 The polymerizable surfactant benzyl vinyl octadecyl dimethyl ammonium chloride, benzyl vinyl dodecyl dimethyl ammonium chloride, dibenzyl vinyl dimethyl ammonium chloride, 2-aminoethyl methacrylate hydrochloride or benzyl vinyl trimethyl ammonium chloride with the nano crystal weight of 5-20 percent is added into the monomer and the initiator together for polymerization.
3. The method for preparing the polymer/nanocrystal hybrid light guide plate as recited in claim 1, wherein: the initiator is one of azodiisoheptonitrile and azodiisobutyronitrile.
4. The method for preparing the polymer/nanocrystal hybrid light guide plate as recited in claim 1, wherein: the thickness of the polymer/nanocrystalline hybrid light guide plate is 0.5-10 mm.
5. A polymer/nanocrystal hybrid light guide plate, characterized in that: is prepared by the method of any one of claims 1 to 4.
Priority Applications (1)
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