CN113900169A - Preparation method of anti-aging light diffusion film - Google Patents
Preparation method of anti-aging light diffusion film Download PDFInfo
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- CN113900169A CN113900169A CN202111194854.4A CN202111194854A CN113900169A CN 113900169 A CN113900169 A CN 113900169A CN 202111194854 A CN202111194854 A CN 202111194854A CN 113900169 A CN113900169 A CN 113900169A
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- 238000009792 diffusion process Methods 0.000 title claims abstract description 55
- 230000003712 anti-aging effect Effects 0.000 title claims abstract description 17
- 238000002360 preparation method Methods 0.000 title claims abstract description 7
- 239000007788 liquid Substances 0.000 claims abstract description 67
- 239000011248 coating agent Substances 0.000 claims abstract description 55
- 238000000576 coating method Methods 0.000 claims abstract description 55
- 239000002245 particle Substances 0.000 claims abstract description 38
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000002105 nanoparticle Substances 0.000 claims abstract description 28
- 239000000758 substrate Substances 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000007822 coupling agent Substances 0.000 claims abstract description 25
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 17
- 239000006185 dispersion Substances 0.000 claims abstract description 17
- 239000002904 solvent Substances 0.000 claims abstract description 13
- 238000005576 amination reaction Methods 0.000 claims abstract description 11
- 230000033444 hydroxylation Effects 0.000 claims abstract description 11
- 238000005805 hydroxylation reaction Methods 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 9
- 229960000583 acetic acid Drugs 0.000 claims abstract description 9
- 239000002313 adhesive film Substances 0.000 claims abstract description 9
- 235000011114 ammonium hydroxide Nutrition 0.000 claims abstract description 9
- 239000008367 deionised water Substances 0.000 claims abstract description 9
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 9
- 239000012362 glacial acetic acid Substances 0.000 claims abstract description 9
- 238000000926 separation method Methods 0.000 claims abstract description 9
- 238000003756 stirring Methods 0.000 claims abstract description 9
- 238000001132 ultrasonic dispersion Methods 0.000 claims abstract description 9
- 239000011259 mixed solution Substances 0.000 claims abstract description 4
- 239000002216 antistatic agent Substances 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 12
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 9
- 239000000126 substance Substances 0.000 claims description 9
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 8
- 239000003292 glue Substances 0.000 claims description 8
- 238000000227 grinding Methods 0.000 claims description 8
- 239000012948 isocyanate Substances 0.000 claims description 8
- 239000011347 resin Substances 0.000 claims description 8
- 229920005989 resin Polymers 0.000 claims description 8
- 238000005406 washing Methods 0.000 claims description 8
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 229920002635 polyurethane Polymers 0.000 claims description 6
- 239000004814 polyurethane Substances 0.000 claims description 6
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 5
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- -1 ethoxylated aliphatic alkylamine Chemical class 0.000 claims description 4
- 239000011159 matrix material Substances 0.000 claims description 4
- 229920005862 polyol Polymers 0.000 claims description 4
- 150000003077 polyols Chemical class 0.000 claims description 4
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 4
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 claims description 3
- 229910052593 corundum Inorganic materials 0.000 claims description 3
- 239000000243 solution Substances 0.000 claims description 3
- 239000008096 xylene Substances 0.000 claims description 3
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 3
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 claims description 2
- 229910052681 coesite Inorganic materials 0.000 claims description 2
- 229910052906 cristobalite Inorganic materials 0.000 claims description 2
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 claims description 2
- 150000003839 salts Chemical class 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 229910052682 stishovite Inorganic materials 0.000 claims description 2
- 229910052905 tridymite Inorganic materials 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 4
- 230000032683 aging Effects 0.000 abstract description 4
- 239000010954 inorganic particle Substances 0.000 abstract description 3
- 239000011247 coating layer Substances 0.000 abstract description 2
- 239000010408 film Substances 0.000 description 32
- 239000004973 liquid crystal related substance Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 7
- 150000002513 isocyanates Chemical class 0.000 description 6
- 150000003973 alkyl amines Chemical class 0.000 description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000012802 nanoclay Substances 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000012788 optical film Substances 0.000 description 1
- 239000011146 organic particle Substances 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 229910052882 wollastonite Inorganic materials 0.000 description 1
- 239000010456 wollastonite Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0268—Diffusing elements; Afocal elements characterized by the fabrication or manufacturing method
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
-
- 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
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
Abstract
A preparation method of an anti-aging light diffusion film comprises the following steps: A. carrying out amination or hydroxylation treatment on the surface of the PET substrate; B. preparing diffusion particles: adding a silane coupling agent into deionized water, and adjusting the pH value to 3-6 by using glacial acetic acid and ammonia water; adding the nano particles into a mixed solution of water and ethanol for ultrasonic dispersion treatment; adding the nanoparticle dispersion liquid into the coupling agent decomposition liquid, heating at constant temperature, stirring in a magnetic stirrer, and performing centrifugal separation; C. adding the diffusion particles into the coating liquid, and preheating the coating liquid; D. coating the coating liquid on a PET substrate and placing the PET substrate in a constant-temperature oven; E. curing the adhesive film to completely evaporate the solvent in the coating. The prepared diffusion particles can be uniformly distributed in the coating layer; on the other hand, the inorganic particles with the capability of absorbing ultraviolet rays in the system endow the backlight module with excellent ageing resistance, can obviously prolong the service life of the product and expand the application range.
Description
Technical Field
The invention relates to a preparation method of a diffusion film.
Background
A Liquid Crystal Display (LCD) is a non-active light-emitting electronic device. The liquid crystal, i.e. liquid crystal, has both liquid fluidity and certain specific arrangement characteristics similar to the crystal, does not have light emitting performance, and can obtain display performance only by means of a light source in a backlight module, so that the brightness of the LCD is determined by the backlight module, i.e. the performance of the backlight module directly affects the display quality of the liquid crystal panel.
The backlight module mainly comprises a lighting source, a light guide plate, a diffusion film, a brightness enhancement film and the like. The backlight module of the LCD can be divided into an edge-light type backlight module and a direct-light type backlight module, wherein a light emitting source of the edge-light type backlight module is arranged on the side surface of the liquid crystal screen, and the edge-light type backlight module is thinner and lighter in machine type, low in power consumption, less in occupied space and capable of being applied to small and medium-sized liquid crystal display equipment such as a portable panel and the like; the direct-injection backlight module has the advantages of high brightness, less light loss, wide visual angle and the like because the light source is positioned below the liquid crystal screen, but is only suitable for large-scale display equipment such as liquid crystal televisions and the like because the direct-injection backlight module occupies large space and consumes high power.
The optical film in the backlight module mainly comprises three film systems of a brightness enhancement film, a reflection film and a diffusion film, wherein the reflection film mainly plays a role in improving the reflectivity of an optical surface, reducing light loss and improving the light saturation of the liquid crystal display; the brightness enhancement film is used for adjusting the light ray emitting angle so as to improve the picture viewing angle; the diffusion film is used for improving the texture of a display picture, light rays can be homogenized and softened, the brightness can be improved by front coating, the haze and the brightness can be balanced by back coating, and the antistatic effect is realized.
The light diffusant comprises organic substances (organic glass PMMA, polystyrene PS, cross-linked copolymer, nano-cellulose and the like), and has good light homogenizing effect but large light loss; inorganic (SiO)2、TiO2Sodium wollastonite, nano clay sheets and the like) can solve the problems of light diffusion and light transmission, and the light loss is less, but the particles are easy to agglomerate and have higher price, so that the application of the nano clay sheets has limitation. With the development of liquid crystal display devices, the requirements for light diffusion films are becoming more and more demanding, i.e., higher visible light transmittance is required, and better high temperature resistance, mechanical properties, wear resistance, and the like are also required. Therefore, a single diffusing agent cannot be realized, and the organic-inorganic diffusing agent has the excellent performances of both organic and inorganic particles, and in addition, the material has special functions and properties, such as super-hydrophobicity, ageing resistance, pressure sensitivity, electromagnetic shielding property and the like.
The aging resistance of the light diffusion film is an important index for measuring the service life and the use range of a sample, and in some special display devices, a backlight module is required to have excellent ultraviolet radiation resistance so as to further improve the service life of the diffusion film, so the light diffusion film is an important subject to be solved in the field of diffusion films.
Disclosure of Invention
In order to overcome the defect that the existing diffusion film is insufficient in anti-aging performance, the invention provides a preparation method of an anti-aging light diffusion film.
The technical scheme for solving the technical problem is as follows: a preparation method of an anti-aging light diffusion film comprises the following steps:
A. carrying out amination or hydroxylation treatment on the surface of the PET substrate;
B. preparing diffusion particles: adding a silane coupling agent into deionized water, and adjusting the pH value to 3-6 by using glacial acetic acid and ammonia water to fully dissolve the coupling agent to obtain a coupling agent decomposition liquid;
adding the nanoparticles into a mixed solution of water and ethanol, and performing ultrasonic dispersion treatment to obtain a nanoparticle dispersion solution, wherein the mass ratio of water to ethanol is 1: 1.2;
adding the nanoparticle dispersion liquid into the coupling agent decomposition liquid, heating at constant temperature, stirring in a magnetic stirrer, performing centrifugal separation, and sequentially washing, drying and grinding the centrifugally separated substances to obtain diffusion particles with the particle size of 3-15 μm;
C. adding the diffusion particles into the coating liquid, and preheating the coating liquid;
D. coating the coating liquid on a PET substrate, placing the PET substrate in a constant-temperature oven at the temperature of 60-80 ℃, and curing to form a glue film;
E. curing the adhesive film to completely evaporate the solvent in the coating.
Preferably, the nanoparticles in step B are TiO2、SiO2、CeO2、CaCO3、ZnO、Al2O3One kind of (1).
Preferably, the composition of the coating liquid in the step C is:
matrix resin: 20-25 parts by mass;
solvent: 45-55 parts by mass;
curing agent: 2-4 parts by mass;
antistatic agent: 1-2 parts by mass;
preferably, the matrix resin is one of polyurethane and polyacrylic polyol resin; the solvent is one of toluene, xylene, butanone, N-dimethylformamide and tetrahydrofuran; the curing agent is isocyanate; the antistatic agent is one of an ethoxylated aliphatic alkylamine antistatic agent and an alkylacrylamide salt antistatic agent.
Preferably, the constant temperature heating magnetic stirrer is kept at 20-25 ℃.
The invention has the beneficial effects that: the prepared diffusion particles can be uniformly distributed in the coating layer, no particle agglomeration is generated, the brightness of the backlight module is ensured, and the light transmittance and the haze can be stably improved; on the other hand, the inorganic particles with the capability of absorbing ultraviolet rays in the system endow the backlight module with excellent ageing resistance, can obviously prolong the service life of the product and expand the application range.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments.
In a first embodiment, a method for preparing an anti-aging light diffusion film includes the following steps:
A. carrying out amination or hydroxylation treatment on the surface of the PET substrate;
B. preparing diffusion particles: adding a silane coupling agent into deionized water, and adjusting the pH value to 5 by using glacial acetic acid and ammonia water to fully dissolve the coupling agent to obtain a coupling agent decomposition liquid;
TiO nano particles2Adding the mixture of water and ethanol into the mixture, and performing ultrasonic dispersion treatment to obtain a nanoparticle dispersion liquid, wherein the mass ratio of water to ethanol is 1: 1.2;
adding the nanoparticle dispersion liquid into the coupling agent decomposition liquid, heating at constant temperature in a magnetic stirrer, stirring at constant temperature of 20 ℃ for centrifugal separation, and sequentially washing, drying and grinding the centrifugally separated substances to obtain diffusion particles with the particle size of 3-15 mu m;
C. adding the diffusion particles into a coating liquid, and preheating the coating liquid, wherein the coating liquid comprises the following components:
polyurethane: 20 parts by mass;
toluene: 50 parts by mass;
isocyanate: 3 parts by mass;
ethoxylated fatty alkylamine antistatic agent: 2 parts by mass;
D. coating the coating liquid on a PET substrate, placing the PET substrate in a constant-temperature oven at the temperature of 70 ℃, and curing to form a glue film;
E. curing the adhesive film to completely evaporate the solvent in the coating.
In a second embodiment, a method for preparing an anti-aging light diffusion film includes the following steps:
A. carrying out amination or hydroxylation treatment on the surface of the PET substrate;
B. preparing diffusion particles: adding a silane coupling agent into deionized water, and adjusting the pH value to 3 by using glacial acetic acid and ammonia water to fully dissolve the coupling agent to obtain a coupling agent decomposition liquid;
SiO nano particles2Adding the mixture of water and ethanol into the mixture, and performing ultrasonic dispersion treatment to obtain a nanoparticle dispersion liquid, wherein the mass ratio of water to ethanol is 1: 1.2;
adding the nanoparticle dispersion liquid into the coupling agent decomposition liquid, heating at constant temperature in a magnetic stirrer, stirring at constant temperature of 22 ℃ for centrifugal separation, and sequentially washing, drying and grinding the centrifugally separated substances to obtain diffusion particles with the particle size of 3-15 mu m;
C. adding the diffusion particles into a coating liquid, and preheating the coating liquid, wherein the coating liquid comprises the following components:
polyacrylic polyol resin: 25 parts by mass;
xylene: 45 parts by mass;
isocyanate: 4 parts by mass;
alkyl acrylamide salt antistatic agent: 1.2 parts by mass;
D. coating the coating liquid on a PET substrate, placing the PET substrate in a constant-temperature oven at the temperature of 80 ℃, and curing to form a glue film;
E. curing the adhesive film to completely evaporate the solvent in the coating.
In a third embodiment, a method for preparing an anti-aging light diffusion film includes the following steps:
A. carrying out amination or hydroxylation treatment on the surface of the PET substrate;
B. preparing diffusion particles: adding a silane coupling agent into deionized water, and adjusting the pH value to 6 by using glacial acetic acid and ammonia water to fully dissolve the coupling agent to obtain a coupling agent decomposition liquid;
the nano particle CeO2Adding the mixture of water and ethanol into the mixture, and performing ultrasonic dispersion treatment to obtain a nanoparticle dispersion liquid, wherein the mass ratio of water to ethanol is 1: 1.2;
adding the nanoparticle dispersion liquid into the coupling agent decomposition liquid, heating at constant temperature in a magnetic stirrer, stirring at constant temperature of 23 ℃ for centrifugal separation, and sequentially washing, drying and grinding the centrifugally separated substances to obtain diffusion particles with the particle size of 3-15 mu m;
C. adding the diffusion particles into a coating liquid, and preheating the coating liquid, wherein the coating liquid comprises the following components:
polyurethane: 24 parts by mass;
butanone: 55 parts by mass;
isocyanate: 2 parts by mass;
ethoxylated fatty alkylamine antistatic agent: 1 part by mass;
D. coating the coating liquid on a PET substrate, placing the PET substrate in a constant-temperature oven at the temperature of 60 ℃, and curing to form a glue film;
E. curing the adhesive film to completely evaporate the solvent in the coating.
In a fourth embodiment, a method for preparing an anti-aging light diffusion film includes the following steps:
A. carrying out amination or hydroxylation treatment on the surface of the PET substrate;
B. preparing diffusion particles: adding a silane coupling agent into deionized water, and adjusting the pH value to 4 by using glacial acetic acid and ammonia water to fully dissolve the coupling agent to obtain a coupling agent decomposition liquid;
nano particle CaCO3Adding the mixture of water and ethanol into the mixture, and performing ultrasonic dispersion treatment to obtain a nanoparticle dispersion liquid, wherein the mass ratio of water to ethanol is 1: 1.2;
adding the nanoparticle dispersion liquid into the coupling agent decomposition liquid, heating at constant temperature in a magnetic stirrer, stirring at constant temperature of 25 ℃ for centrifugal separation, and sequentially washing, drying and grinding the centrifugally separated substances to obtain diffusion particles with the particle size of 3-15 mu m;
C. adding the diffusion particles into a coating liquid, and preheating the coating liquid, wherein the coating liquid comprises the following components:
polyacrylic polyol resin: 22 parts by mass;
n, N-dimethylformamide: 52 parts by mass;
isocyanate: 3 parts by mass;
alkyl acrylamide salt antistatic agent: 1.5 parts by mass;
D. coating the coating liquid on a PET substrate, placing the PET substrate in a constant-temperature oven at the temperature of 75 ℃, and curing to form a glue film;
E. curing the adhesive film to completely evaporate the solvent in the coating.
Embodiment five, a method for preparing an anti-aging light diffusion film, comprising the steps of:
A. carrying out amination or hydroxylation treatment on the surface of the PET substrate;
B. preparing diffusion particles: adding a silane coupling agent into deionized water, and adjusting the pH value to 5 by using glacial acetic acid and ammonia water to fully dissolve the coupling agent to obtain a coupling agent decomposition liquid;
adding nano-particle ZnO into a mixed solution of water and ethanol, and performing ultrasonic dispersion treatment to obtain a nano-particle dispersion solution, wherein the mass ratio of water to ethanol is 1: 1.2;
adding the nanoparticle dispersion liquid into the coupling agent decomposition liquid, heating at constant temperature in a magnetic stirrer, stirring at constant temperature of 21 ℃ for centrifugal separation, and sequentially washing, drying and grinding the centrifugally separated substances to obtain diffusion particles with the particle size of 3-15 mu m;
C. adding the diffusion particles into a coating liquid, and preheating the coating liquid, wherein the coating liquid comprises the following components:
polyurethane: 21 parts by mass;
tetrahydrofuran: 48 parts by mass;
isocyanate: 2.5 parts by mass;
ethoxylated fatty alkylamine antistatic agent: 1.8 parts by mass;
D. coating the coating liquid on a PET substrate, placing the PET substrate in a constant-temperature oven at the temperature of 65 ℃, and curing to form a glue film;
E. curing the adhesive film to completely evaporate the solvent in the coating.
Embodiment six, a method for preparing an anti-aging light diffusion film, comprising the steps of:
A. carrying out amination or hydroxylation treatment on the surface of the PET substrate;
B. preparing diffusion particles: adding a silane coupling agent into deionized water, and adjusting the pH value to 6 by using glacial acetic acid and ammonia water to fully dissolve the coupling agent to obtain a coupling agent decomposition liquid;
nano particles of Al2O3Adding the mixture of water and ethanol into the mixture, and performing ultrasonic dispersion treatment to obtain a nanoparticle dispersion liquid, wherein the mass ratio of water to ethanol is 1: 1.2;
adding the nanoparticle dispersion liquid into the coupling agent decomposition liquid, heating at constant temperature in a magnetic stirrer, stirring at constant temperature of 20 ℃ for centrifugal separation, and sequentially washing, drying and grinding the centrifugally separated substances to obtain diffusion particles with the particle size of 3-15 mu m;
C. adding the diffusion particles into a coating liquid, and preheating the coating liquid, wherein the coating liquid comprises the following components:
polyurethane: 21 parts by mass;
tetrahydrofuran: 48 parts by mass;
isocyanate: 2.5 parts by mass;
ethoxylated fatty alkylamine antistatic agent: 1.8 parts by mass;
D. coating the coating liquid on a PET substrate, placing the PET substrate in a constant-temperature oven at the temperature of 70 ℃, and curing to form a glue film;
E. curing the adhesive film to completely evaporate the solvent in the coating.
It should be noted that, the amination or hydroxylation treatment of the PET substrate surface in the above embodiments is a conventional technique in the art, and is not described herein again, the amination treatment is performed by treating the PET surface with ammonia plasma, and the hydroxylation method is alkaline solution cleaning.
Claims (5)
1. The preparation method of the anti-aging light diffusion film is characterized by comprising the following steps:
A. carrying out amination or hydroxylation treatment on the surface of the PET substrate;
B. preparing diffusion particles: adding a silane coupling agent into deionized water, and adjusting the pH value to 3-6 by using glacial acetic acid and ammonia water to fully dissolve the coupling agent to obtain a coupling agent decomposition liquid;
adding the nanoparticles into a mixed solution of water and ethanol, and performing ultrasonic dispersion treatment to obtain a nanoparticle dispersion solution, wherein the mass ratio of water to ethanol is 1: 1.2;
adding the nanoparticle dispersion liquid into the coupling agent decomposition liquid, heating at constant temperature, stirring in a magnetic stirrer, performing centrifugal separation, and sequentially washing, drying and grinding the centrifugally separated substances to obtain diffusion particles with the particle size of 3-15 μm;
C. adding the diffusion particles into the coating liquid, and preheating the coating liquid;
D. coating the coating liquid on a PET substrate, placing the PET substrate in a constant-temperature oven at the temperature of 60-80 ℃, and curing to form a glue film;
E. curing the adhesive film to completely evaporate the solvent in the coating.
2. The method for producing an anti-aging light diffusion film according to claim 1, characterized in that: the nano particles in the step B are TiO2、SiO2、CeO2、CaCO3、ZnO、Al2O3One kind of (1).
3. The method for producing an anti-aging light diffusion film according to claim 1, characterized in that: the composition of the coating liquid in the step C is as follows:
matrix resin: 20-25 parts by mass;
solvent: 45-55 parts by mass;
curing agent: 2-4 parts by mass;
antistatic agent: 1-2 parts by mass.
4. The method for producing an anti-aging light diffusion film according to claim 3, characterized in that: the matrix resin is one of polyurethane and polyacrylic polyol resin; the solvent is one of toluene, xylene, butanone, N-dimethylformamide and tetrahydrofuran; the curing agent is isocyanate; the antistatic agent is one of an ethoxylated aliphatic alkylamine antistatic agent and an alkylacrylamide salt antistatic agent.
5. The method for producing an anti-aging light diffusion film according to claim 1, characterized in that: the magnetic stirrer is heated at constant temperature and is kept at 20-25 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111194854.4A CN113900169A (en) | 2021-10-14 | 2021-10-14 | Preparation method of anti-aging light diffusion film |
Applications Claiming Priority (1)
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