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CN112266571A - PDLC light modulation film - Google Patents

PDLC light modulation film Download PDF

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Publication number
CN112266571A
CN112266571A CN202011154731.3A CN202011154731A CN112266571A CN 112266571 A CN112266571 A CN 112266571A CN 202011154731 A CN202011154731 A CN 202011154731A CN 112266571 A CN112266571 A CN 112266571A
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parts
light
liquid crystal
adjusting film
light adjusting
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CN202011154731.3A
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Inventor
蔡正方
李清华
王星星
黄骏昌
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Dongguan Xinju Photoelectric Technology Co ltd
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Dongguan Xinju Photoelectric Technology Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • 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 
    • G02F1/15—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 an electrochromic effect
    • G02F1/1514—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 an electrochromic effect characterised by the electrochromic material, e.g. by the electrodeposited material
    • G02F1/1516—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 an electrochromic effect characterised by the electrochromic material, e.g. by the electrodeposited material comprising organic material
    • G02F1/15165—Polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2361/00—Characterised by the use of condensation polymers of aldehydes or ketones; Derivatives of such polymers
    • C08J2361/04—Condensation polymers of aldehydes or ketones with phenols only
    • C08J2361/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2413/00—Characterised by the use of rubbers containing carboxyl groups
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2483/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
    • C08J2483/04—Polysiloxanes
    • C08J2483/08—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen, and oxygen
    • 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
    • C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
    • C08K13/04—Ingredients characterised by their shape and organic or inorganic ingredients
    • 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
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2227—Oxides; Hydroxides of metals of aluminium
    • 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
    • C08K2201/002—Physical properties
    • C08K2201/005—Additives being defined by their particle size in general
    • 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
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • 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
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/22—Expanded, porous or hollow particles
    • C08K7/24—Expanded, porous or hollow particles inorganic
    • C08K7/26—Silicon- containing compounds

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  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The invention provides a PDLC (polymer dispersed liquid crystal) light adjusting film which comprises the light adjusting film, wherein the light adjusting film comprises the following raw materials in parts by weight: 7-12 parts of liquid crystal molecules, 0.001-0.003 part of liquid crystal spacer particles, 0.001-0.003 part of yttrium aluminum garnet powder, 2-5 parts of hydroxypropyl acrylate, 0.1-0.5 part of light curing agent, 50-65 parts of phenolic resin, 15-20 parts of hydroxyl-terminated fluorine-containing polysiloxane resin, 1-2 parts of toughening agent and 0.1-0.3 part of vanadium dioxide. The PDLC light modulation film disclosed by the invention is low in manufacturing cost, good in light transmittance during power-on, excellent in fog shielding effect during power-off, excellent in water and oxygen resistance and prolonged in service life.

Description

PDLC light modulation film
Technical Field
The invention relates to the technical field of optical films, in particular to a PDLC (polymer dispersed liquid crystal) dimming film.
Background
The PDLC light control film, i.e., a polymer dispersed liquid crystal film, is a film that can control the state of light passing therethrough. The light modulating film can be changed between transparent and non-transparent states, and the transparency can be adjusted by a voltage. The working principle is as follows: when the two ends of the light adjusting film are powered off, the polymer liquid crystal material between the two ends is arranged in disorder, so that light cannot penetrate through the film, and the visual effect is in a foggy opaque state; when the two ends of the light adjusting film are electrified, the polymer liquid crystal materials are orderly arranged under the action of an electric field, so that light can penetrate through the film, and the visual effect is a transparent state. In the PDLC light modulation film of the prior art, a large amount of liquid crystal molecules are usually filled in a monomer prepolymer and an epoxy resin, and a small amount of light curing agent is added, and the monomer prepolymer undergoes a polymerization reaction under the irradiation of ultraviolet light to form a layer of light modulation film containing the liquid crystal molecules. The light adjusting film needs to use liquid crystal molecules with a large proportion to achieve an ideal transparent or opaque switching effect, the cost is high, in addition, the epoxy resin is used as an adhesive, the light adjusting film is easily affected by water and oxygen to generate a yellowing aging phenomenon, and the visual effect of the light adjusting film is affected.
Disclosure of Invention
In order to solve the problems, the PDLC light modulation film provided by the invention has the advantages of low manufacturing cost, good light transmittance during power-on, excellent fog shielding effect during power-off, excellent water and oxygen resistance and prolonged service life.
In order to achieve the purpose, the invention is solved by the following technical scheme:
the PDLC light adjusting film comprises a light adjusting film, and the raw material of the light adjusting film comprises the following components in parts by weight: 7-12 parts of liquid crystal molecules, 0.001-0.003 part of liquid crystal spacer particles, 0.001-0.003 part of yttrium aluminum garnet powder, 2-5 parts of hydroxypropyl acrylate, 0.1-0.5 part of light curing agent, 50-65 parts of phenolic resin, 15-20 parts of hydroxyl-terminated fluorine-containing polysiloxane resin, 1-2 parts of toughening agent and 0.1-0.3 part of vanadium dioxide.
Specifically, the liquid crystal spacer particles are fumed silica.
Specifically, the light curing agent is selected from 2-hydroxy-2-methyl-1-phenyl acetone, 1-hydroxycyclohexyl phenyl ketone, 2-methyl-2- (4-morpholinyl) -1- [4- (methylthio) phenyl ] -1-acetone, 2,4, 6-trimethyl benzoyl-diphenyl phosphine oxide, 2,4, 6-trimethyl benzoyl phenyl phosphonic acid ethyl ester, 2-dimethylamino-2-benzyl-1- [4- (4-morpholinyl) phenyl ] -1-butanone, 2-hydroxy-2-methyl-1- [4- (2-hydroxyethoxy) phenyl ] -1-acetone and methyl benzoylformate.
Specifically, the toughening agent is selected from one of carboxyl nitrile rubber, liquid nitrile rubber, polyvinyl butyral, polyether sulfone and polyphenylene ether ketone.
Specifically, the yttrium aluminum garnet powder is prepared from yttrium oxide and aluminum oxide by a high-temperature solid phase method, and the particle size of the yttrium aluminum garnet powder is less than 80 microns.
The invention has the beneficial effects that:
firstly, a small amount of yttrium aluminum garnet powder is added into the PDLC light adjusting film, the yttrium aluminum garnet powder has a plurality of edge surfaces and has an excellent refraction effect on light, the emergent angle of light can be increased by utilizing the light scattering effect of the yttrium aluminum garnet powder in the power-off state of the light adjusting film, the using amount of liquid crystal molecules is reduced, and a better atomization shielding effect can be realized in the power-off state;
secondly, hydroxyl-terminated fluorine-containing polysiloxane resin is added, fluorine ions are contained in the hydroxyl-terminated fluorine-containing polysiloxane resin, and the water resistance and moisture resistance of the light adjusting film can be improved by utilizing the hydrophobic property of the fluorine ions;
thirdly, the phenolic resin is added, the phenolic resin has excellent oxygen insulation capacity, can prevent the light modulation film from yellowing and aging, prolongs the service life of the light modulation film, and is added with the toughening agent, so that the toughness of the phenolic resin is improved, and the impact resistance of the phenolic resin is improved;
the fourth, added vanadium dioxide, vanadium dioxide has the phase transition characteristic, and the change of structure can lead to the reversible transition to the infrared light by the transmission to reflection around the phase transition to make the membrane of adjusting luminance can completely cut off infrared radiation when the high temperature, when the membrane of adjusting luminance is installed on window glass for the building, can reach and prevent that infrared radiation from getting into indoor effect.
Drawings
Fig. 1 is an optical schematic diagram of the power-off state of the light modulation film of the present invention, and the upper and lower ends of the light modulation film are covered with ITO conductive films.
Fig. 2 is an optical schematic diagram of the power-on state of the light modulation film of the present invention, and the upper and lower ends of the light modulation film are covered with ITO conductive films.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the embodiments of the present invention are not limited thereto.
Example 1
A PDLC light adjusting film comprises a light adjusting film, and the raw material of the light adjusting film comprises the following components in parts by weight: 10 parts of liquid crystal molecules, 0.002 part of fumed silica, 0.002 part of yttrium aluminum garnet powder, 3 parts of hydroxypropyl acrylate, 0.2 part of 2-hydroxy-2-methyl-1-phenyl acetone, 60 parts of phenolic resin, 15 parts of hydroxyl-terminated fluorine-containing polysiloxane resin, 1 part of carboxyl nitrile rubber and 0.1 part of vanadium dioxide, wherein the particle size of the yttrium aluminum garnet powder is less than 80 microns.
The PDLC light adjusting film is prepared by the following steps: weighing liquid crystal molecules, fumed silica, yttrium aluminum garnet powder, hydroxypropyl acrylate, 2-hydroxy-2-methyl-1-phenyl acetone, phenolic resin, hydroxyl-terminated fluorine-containing polysiloxane resin, carboxyl nitrile rubber and vanadium dioxide according to the formula for later use; adding the weighed liquid crystal molecules, fumed silica, yttrium aluminum garnet powder, hydroxypropyl acrylate, phenolic resin, hydroxyl-terminated fluorine-containing polysiloxane resin, carboxyl nitrile rubber and vanadium dioxide into a stirring device, and stirring for 20-30 min at the temperature of 30-40 ℃; adding 2-hydroxy-2-methyl-1-phenyl acetone, and continuously stirring for 10-20 min at the temperature of 30-40 ℃; adding the mixture into a coating press, uniformly coating the mixture between two layers of ITO films by a feeding groove on the coating press, compacting the two layers of films by a press roller to ensure that the press gap is 10-15um, and drawing the films by a drawing rollerPressing and cutting to obtain a semi-finished film layer, transferring the semi-finished film layer to an ultraviolet curing machine at a speed of 25-40 muW/cm2And curing for 3-5 min to obtain a test film layer, wherein the test film layer consists of two layers of ITO films and a light adjusting film.
And (3) testing: and (3) performing a power-off and power-on test on the test film layer, testing the light transmittance and the haze under two states, and recording the test results as the following table 1. The light ray simulation line in the power-off state is shown in fig. 1, and the visual effect is fog-like and non-perspective; the light simulation line in the power-on state is shown in fig. 2, and the visual effect is perspective.
Example 2
A PDLC light adjusting film comprises a light adjusting film, and the raw material of the light adjusting film comprises the following components in parts by weight: 8 parts of liquid crystal molecules, 0.002 part of fumed silica, 0.003 part of yttrium aluminum garnet powder, 3 parts of hydroxypropyl acrylate, 0.2 part of 2-hydroxy-2-methyl-1-phenyl acetone, 62 parts of phenolic resin, 15 parts of hydroxyl-terminated fluorine-containing polysiloxane resin, 1 part of carboxyl nitrile rubber and 0.1 part of vanadium dioxide, wherein the particle size of the yttrium aluminum garnet powder is less than 80 microns.
The PDLC light adjusting film is prepared by the following steps: weighing liquid crystal molecules, fumed silica, yttrium aluminum garnet powder, hydroxypropyl acrylate, 2-hydroxy-2-methyl-1-phenyl acetone, phenolic resin, hydroxyl-terminated fluorine-containing polysiloxane resin, carboxyl nitrile rubber and vanadium dioxide according to the formula for later use; adding the weighed liquid crystal molecules, fumed silica, yttrium aluminum garnet powder, hydroxypropyl acrylate, phenolic resin, hydroxyl-terminated fluorine-containing polysiloxane resin, carboxyl nitrile rubber and vanadium dioxide into a stirring device, and stirring for 20-30 min at the temperature of 30-40 ℃; adding 2-hydroxy-2-methyl-1-phenyl acetone, and continuously stirring for 10-20 min at the temperature of 30-40 ℃; adding the mixture into a coating and pressing machine, uniformly coating the mixture between two layers of ITO films by a feeding groove on the coating and pressing machine, compacting the two layers of films by a pressing roller to ensure that the pressing distance is 10-15 mu m, drawing the films by a traction roller, performing pressing and cutting to obtain a semi-finished film layer, transferring the semi-finished film layer into an ultraviolet curing machine, and curing at 25-40 mu W/cm2Curing for 3-5 min to obtain a test film layer consisting of twoA layer of ITO film and a light adjusting film.
And (3) testing: and (3) performing a power-off and power-on test on the test film layer, testing the light transmittance and the haze under two states, and recording the test results as the following table 1. The light ray simulation line in the power-off state is shown in fig. 1, and the visual effect is fog-like and non-perspective; the light simulation line in the power-on state is shown in fig. 2, and the visual effect is perspective.
TABLE 1 test results
Figure BDA0002742341700000031
As can be seen from the data of examples 1 and 2 in table 1 above, the visible light transmittance of the light modulation film of the present invention in the power-on state exceeds 90%, and the haze in the power-off state exceeds 85%, which indicates that the light modulation film of the present invention has excellent power-on light transmittance and power-off atomization shielding performance.
The above examples only show 2 embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (5)

1. The PDLC light adjusting film comprises a light adjusting film and is characterized in that the light adjusting film comprises the following components in parts by weight: 7-12 parts of liquid crystal molecules, 0.001-0.003 part of liquid crystal spacer particles, 0.001-0.003 part of yttrium aluminum garnet powder, 2-5 parts of hydroxypropyl acrylate, 0.1-0.5 part of light curing agent, 50-65 parts of phenolic resin, 15-20 parts of hydroxyl-terminated fluorine-containing polysiloxane resin, 1-2 parts of toughening agent and 0.1-0.3 part of vanadium dioxide.
2. The PDLC light modulation film according to claim 1, wherein said liquid crystal spacer particles are fumed silica.
3. The PDLC light modulation film according to claim 1, wherein said light curing agent is selected from the group consisting of 2-hydroxy-2-methyl-1-phenyl acetone, 1-hydroxycyclohexyl phenyl ketone, 2-methyl-2- (4-morpholinyl) -1- [4- (methylthio) phenyl ] -1-propanone, 2,4, 6-trimethylbenzoyl-diphenyl phosphine oxide, ethyl 2,4, 6-trimethylbenzoylphenylphosphonate, 2-dimethylamino-2-benzyl-1- [4- (4-morpholinyl) phenyl ] -1-butanone, 2-hydroxy-2-methyl-1- [4- (2-hydroxyethoxy) phenyl ] -1-propanone, One of methyl benzoylformate.
4. The PDLC light adjusting film according to claim 1, wherein the toughening agent is selected from one of carboxylated nitrile rubber, liquid nitrile rubber, polyvinyl butyral, polyether sulfone and polyphenylene ether ketone.
5. The PDLC light adjusting film as claimed in claim 1, wherein said yttrium aluminum garnet powder is prepared from yttrium oxide and aluminum oxide by a high temperature solid phase method, and the particle size of said yttrium aluminum garnet powder is less than 80 μm.
CN202011154731.3A 2020-10-26 2020-10-26 PDLC light modulation film Pending CN112266571A (en)

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JP2004287273A (en) * 2003-03-24 2004-10-14 Sumitomo Metal Mining Co Ltd Reflective film
US20050209400A1 (en) * 2002-04-26 2005-09-22 Manabu Tsumura Hardenable composition, hardening product, process for producing the same and light emitting diode sealed with the hardening product
US20100079869A1 (en) * 2008-09-30 2010-04-01 Katsumi Inoue Antiglare film, antireflective film, polarizing plate and image display device
CN102615894A (en) * 2012-03-15 2012-08-01 天津大学 Flexible liquid crystal thin film and preparation method thereof
CN102893417A (en) * 2010-03-23 2013-01-23 株式会社朝日橡胶 Silicone resin reflective substrate, manufacturing method for same, and base material composition used in reflective substrate
CN203433232U (en) * 2013-09-12 2014-02-12 北京众智同辉科技有限公司 Film-pasting plastic type liquid crystal film
CN105018110A (en) * 2015-07-09 2015-11-04 张家港康得新光电材料有限公司 Liquid crystal composition and electrically controlled light adjusting film
JP2017111413A (en) * 2015-12-16 2017-06-22 伊藤光学工業株式会社 Optical element
CN110244486A (en) * 2019-04-23 2019-09-17 天津宝兴威科技股份有限公司 A kind of preparation method of liquid crystal light modulation film

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US20050209400A1 (en) * 2002-04-26 2005-09-22 Manabu Tsumura Hardenable composition, hardening product, process for producing the same and light emitting diode sealed with the hardening product
JP2004287273A (en) * 2003-03-24 2004-10-14 Sumitomo Metal Mining Co Ltd Reflective film
US20100079869A1 (en) * 2008-09-30 2010-04-01 Katsumi Inoue Antiglare film, antireflective film, polarizing plate and image display device
CN102893417A (en) * 2010-03-23 2013-01-23 株式会社朝日橡胶 Silicone resin reflective substrate, manufacturing method for same, and base material composition used in reflective substrate
CN102615894A (en) * 2012-03-15 2012-08-01 天津大学 Flexible liquid crystal thin film and preparation method thereof
CN203433232U (en) * 2013-09-12 2014-02-12 北京众智同辉科技有限公司 Film-pasting plastic type liquid crystal film
CN105018110A (en) * 2015-07-09 2015-11-04 张家港康得新光电材料有限公司 Liquid crystal composition and electrically controlled light adjusting film
JP2017111413A (en) * 2015-12-16 2017-06-22 伊藤光学工業株式会社 Optical element
CN110244486A (en) * 2019-04-23 2019-09-17 天津宝兴威科技股份有限公司 A kind of preparation method of liquid crystal light modulation film

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