CN110964217A - PDLC mixture containing nano silver wires, liquid crystal dimming film and preparation method thereof - Google Patents
PDLC mixture containing nano silver wires, liquid crystal dimming film and preparation method thereof Download PDFInfo
- Publication number
- CN110964217A CN110964217A CN201911223185.1A CN201911223185A CN110964217A CN 110964217 A CN110964217 A CN 110964217A CN 201911223185 A CN201911223185 A CN 201911223185A CN 110964217 A CN110964217 A CN 110964217A
- Authority
- CN
- China
- Prior art keywords
- liquid crystal
- nano silver
- pdlc
- silver wires
- light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
-
- 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
- C08F265/00—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00
- C08F265/04—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00 on to polymers of esters
- C08F265/06—Polymerisation of acrylate or methacrylate esters on to polymers thereof
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/52—Liquid crystal materials characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
-
- 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
-
- 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
- G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
-
- 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
- C08J2351/00—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
-
- 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
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0806—Silver
-
- 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
-
- 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
- C08K2201/016—Additives defined by their aspect ratio
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- Crystallography & Structural Chemistry (AREA)
- Organic Chemistry (AREA)
- Polymers & Plastics (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Liquid Crystal (AREA)
- Dispersion Chemistry (AREA)
Abstract
The invention relates to a PDLC mixture containing nano silver wires, a liquid crystal dimming film and a preparation method thereof, wherein the PDLC mixture comprises nematic liquid crystal, light-cured glue, microbeads and nano silver wires, and the dosage ratio of the nematic liquid crystal to the light-cured glue to the nano silver wires is (50-70): (40-55): (1-8), wherein the micro-beads are nematic liquid crystal, photo-curing glue, 2-6 per mill of the total mass of the micro-beads and the nano silver wires. The invention uses the nano silver wire as the conductive material to be dispersed in the PDLC mixture, and the nano silver wire can be effectively dispersed in the organic solvent by using the preparation method, thereby not only effectively reducing the driving voltage of the PDLC light-adjusting film and improving the photoelectric property of the liquid crystal light-adjusting film, but also being relatively simple and easy to operate.
Description
Technical Field
The invention relates to the technical field of liquid crystal dimming films, in particular to a PDLC mixture containing nano silver wires, a liquid crystal dimming film and a preparation method thereof.
Background
Polymer Dispersed Liquid Crystal (PDLC) is a Liquid Crystal/Polymer composite material in which nematic Liquid Crystal is uniformly Dispersed in a Polymer matrix in the form of droplets, and then polymerization reaction occurs in a polymerized monomer in a composite system of the Liquid Crystal and the polymerized monomer by light or heat curing, so that the molecular weight is gradually increased, the compatibility between the polymerized monomer and the Liquid Crystal is reduced, and the Liquid Crystal is gradually separated from the composite system. In an OFF-mode (non-energized mode), liquid crystal droplets are irregularly arranged, and due to strong optical anisotropy of liquid crystal molecules, the ordinary refractive index of the liquid crystal is not matched with that of a polymer matrix, so that the PDLC film has strong scattering property on light, and therefore the PDLC film in the OFF-mode is in an opaque (frosted) state; in an ON-mode (power-ON mode), liquid crystal droplets are orderly arranged under the action of an electric field, the refractive index of ordinary light of the liquid crystal and the refractive index matching degree of a polymer matrix are increased, most of light can directly penetrate through the liquid crystal, and the refraction and reflection of the light are greatly reduced, so that the PDLC film is in a transparent state.
At present, most of PDLC film research and development adopt the improvement of the matching and compatibility of liquid crystal and polymer matrix to obtain the PDLC film with better performance, but because the research and development process of the system has more influencing factors, the research and development direction is slow, and the effect is not satisfactory. However, the driving voltage of the PDLC can be effectively reduced by doping the conductive particles into the PDLC mixed liquid. At present, chinese patent No. CN104698668B mentions a PDLC film doped with nano conductive particles, in the method, graphene nano conductive particles are doped, and since graphene is doped in a hydrophilic material, when the PDLC film is doped with an organic material, the graphene material is difficult to be dispersed even in the PDLC, and the PDLC film has non-uniform photoelectric properties. Another publication, CN107011923A, "a method for preparing a carbon nanotube-doped polymer-dispersed liquid crystal film", discloses that modified carbon nanotubes are doped into PDLC to improve its optoelectronic properties, and this method also has the problem of difficult dispersion of carbon nanotubes.
Disclosure of Invention
The invention aims to solve the defects of the prior art, provides a PDLC mixture with a nano silver wire as a conductive material dispersed in PDLC, and also provides a preparation method of a liquid crystal light adjusting film prepared by using the PDLC mixture.
The technical scheme adopted by the invention is as follows:
a PDLC mixture containing nano silver wires comprises nematic liquid crystal, light-cured glue, microbeads and nano silver wires, wherein the usage ratio of the nematic liquid crystal to the light-cured glue to the nano silver wires is (50-70): (40-55): (1-8), wherein the micro-beads are nematic liquid crystal, photo-curing glue, 2-6 per mill of the total mass of the micro-beads and the nano silver wires.
The nano silver wire can be uniformly dispersed in the PDLC mixed solution because the nano silver wire is used as a metal nano material and can be effectively dispersed in an organic solvent. In the preparation process of the nano silver wire, an aqueous phase dispersion liquid can be selected, and an organic dispersion system can also be used. In the dispersion process, the interaction energy between the nanoparticles, the steric resistance, the surface tension, the electrostatic interaction energy of the electric double layer, and the like must be considered. Therefore, the patent preferentially selects a physical dispersion mode to disperse the nano silver wires into the PDLC mixed solution.
Preferably, the diameter of the nano silver wire is within the range of 20-100 nm, and the length-diameter ratio is within the range of 30-500 nm. The nano silver wire is used as a one-dimensional nano conductive material, when the size is reduced from 10 microns to 20-100 nm, the particle size is only changed by about 100-fold and 500-fold, but is close to the 9-fold of 10 when converted into volume. Therefore, the resistance value of the silver wire can be reduced to the limit value of the conductive capability of the silver material in the same volume, and compared with the conductive resistance of the traditional silver wire material, the resistance value of the one-dimensional nano silver wire is lower. The driving voltage of the PDLC light modulation film can be effectively reduced.
The photocuring glue comprises the following components in percentage by mass:
preferably, the photoinitiator is any one or a combination of 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide, 2-hydroxy-2-methylphenylpropane-1-one and 1-hydroxycyclohexylphenylketone.
Preferably, the light-curing glue comprises the following components in percentage by mass:
preferably, the particle size of the microbeads is 7-30 microns.
A method for preparing a liquid crystal light adjusting film containing a nano silver wire PDLC mixture comprises the following steps:
step one, preparing a PDLC mixture: weighing the raw materials according to the proportion, mixing the light-cured glue and the nano-silver wires by ultrasonic oscillation, centrifuging, taking the upper glue solution, adding the nematic liquid crystal and the microbeads, and dispersing uniformly in vacuum to obtain a PDLC mixture; or mixing the nematic liquid crystal, the light-cured glue, the micro-beads and the nano-silver wires by ultrasonic oscillation, centrifuging, taking the upper glue solution, adding the micro-beads, and uniformly stirring to obtain a PDLC mixture;
step two, coating: uniformly clamping the PDLC mixture between two layers of conductive plastic films, and forming a thin layer of 7-30 mu m after uniform extrusion by a roller;
step three, ultraviolet curing: preparing the PDLC film doped with the nano silver wires by ultraviolet photopolymerization at the temperature of 20-35 ℃.
Preferably, the ultrasonic oscillation time in the first step is 10-50 min, and the centrifugal rotation speed is 1000-5000 r/min. Setting the vacuum value to be controlled to be-20 to-5 kpa, the dispersion rotating speed to be 500 to 1000r/min, and the dispersion time to be 10 to 30 min.
Preferably, the ultraviolet light intensity of the step three is 3-20mw/cm2The polymerization time is 3-8 min.
A liquid crystal light adjusting film containing a nano silver wire PDLC mixture, and a product prepared by any one of the preparation methods.
Compared with the prior art, the invention has the following advantages: the invention uses the nano silver wire as the conductive material to be dispersed in the PDLC mixture, and the nano silver wire can be effectively dispersed in the organic solvent by using the preparation method, thereby not only effectively reducing the driving voltage of the PDLC light-adjusting film and improving the photoelectric property of the liquid crystal light-adjusting film, but also being relatively simple and easy to operate.
Drawings
Fig. 1 is a graph comparing the transmittance photoelectric curves of the liquid crystal light-adjusting film prepared by the present invention and the liquid crystal light-adjusting film without adding nano silver wires.
Fig. 2 is a comparison graph of haze photoelectric curves of the liquid crystal light-adjusting film prepared by the invention and the liquid crystal light-adjusting film without the added nano silver wire.
Fig. 3 is a graph comparing the transmittance photoelectric curves of the liquid crystal light-adjusting film prepared by the present invention and the liquid crystal light-adjusting film after aging test.
Fig. 4 is a comparison graph of haze photoelectric curves of the liquid crystal light-adjusting film prepared by the invention and the liquid crystal light-adjusting film after aging test.
The specific implementation mode is as follows:
in order to enhance the understanding of the present invention, the present invention will be described in further detail with reference to embodiments. The invention can be implemented by:
example 1
Step one, preparing a PDLC mixture:
1. preparing photocuring glue, namely mixing 7% of hydroxyethyl methacrylate, 7% of methacrylate- β -hydroxyethyl, 6% of polyalkyl acrylate borneol, 25% of polyolefin acrylate, 50% of acrylic acrylate oligomer, 1% of silane coupling agent, 2% of 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide and 2% of 1-hydroxycyclohexyl phenyl ketone according to a proportion to obtain the photocuring glue in a shading or yellow light environment.
2. Selecting a nano silver wire with the diameter of 50nm and the length-diameter ratio of 250nm, and mixing nematic liquid crystal, light curing glue and the nano silver wire according to the weight ratio of 60: 50: 1, and the micro beads are weighed according to the proportion of 4 per mill of the total mass of the nematic liquid crystal, the photo-curing glue, the micro beads and the nano silver wires.
3. And (3) carrying out ultrasonic oscillation on the nano silver wire and the light-cured glue for 30min, and centrifuging at 2500r/min to obtain an upper-layer glue solution. And finally, mixing the upper glue solution with nematic liquid crystal and 15-micron microbeads, setting the vacuum value to be-15 kpa, dispersing at the rotating speed of 800r/min for 20min, and dispersing uniformly in vacuum to obtain the PDLC mixture.
Step two, coating: uniformly clamping the PDLC mixture between two layers of transparent conductive plastic films, and uniformly extruding by using a roller to form a thin layer of 15 mu m;
step three, ultraviolet curing: under the environment that the curing temperature is 24 ℃, the passing light intensity is 10mW/cm2And (3) carrying out ultraviolet polymerization, wherein the curing polymerization time is 5min, thus obtaining the PDLC light adjusting film doped with the nano silver wires.
Example 2
Step one, preparing a PDLC mixture:
1. the preparation of the photo-curing glue is the same as that of example 1;
2. selecting a nano silver wire with the diameter of 50nm and the length-diameter ratio of 200nm, and mixing nematic liquid crystal, light curing glue and the nano silver wire according to the weight ratio of 65: 50: 2, and the micro beads are weighed according to the proportion of 4 per mill of the total mass of the nematic liquid crystal, the photo-curing glue, the micro beads and the nano silver wires.
3. And (3) carrying out ultrasonic oscillation on the weighed nano silver wires, the light-cured glue solution, the nematic liquid crystal and 15-micron microbeads for 30min, centrifuging at 3000r/min to obtain an upper glue solution, adding the microbeads, and uniformly stirring to obtain the PDLC mixture.
Step two, coating: uniformly clamping the PDLC mixture between two layers of transparent conductive plastic films, and uniformly extruding by using a roller to form a thin layer of 15 mu m;
step three, ultraviolet curing: under the environment that the curing temperature is 24 ℃, the passing light intensity is 14mW/cm2And (3) carrying out ultraviolet polymerization, wherein the curing polymerization time is 5min, thus obtaining the PDLC light adjusting film doped with the nano silver wires.
Example 3
Step one, preparing a PDLC mixture:
1. the preparation method of the photocuring glue comprises the steps of mixing 10% of hydroxyethyl methacrylate, 10% of- β -hydroxyethyl methacrylate, 9% of polyalkyl acrylate borneol, 23% of polyolefin acrylate, 40% of acrylic acrylate oligomer, 3% of a silane coupling agent, 4% of 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide and 1% of 2-hydroxy-2-methylphenylpropane-1-one in a shading or yellow light environment in proportion to obtain the photocuring glue.
2. Selecting a nano silver wire with the diameter of 30nm and the length-diameter ratio of 200nm, and mixing nematic liquid crystal, light curing glue and the nano silver wire according to the ratio of 55: 40: 4, and the micro-beads are weighed according to the proportion of 4 per mill of the total mass of the nematic liquid crystal, the photo-curing glue, the micro-beads and the nano silver wires.
3. And (3) carrying out ultrasonic oscillation on the nano silver wire and the light-cured glue for 15min, and centrifuging at 1500r/min to obtain the upper-layer glue solution. And finally, mixing the upper glue solution with nematic liquid crystal and 8-micron microbeads, setting the vacuum value to be-15 kpa, dispersing at the rotating speed of 800r/min for 20min, and dispersing uniformly in vacuum to obtain the PDLC mixture.
Step two, coating: uniformly clamping the PDLC mixture between two layers of transparent conductive plastic films, and uniformly extruding by using a roller to form a thin layer of 20 mu m;
step three, ultraviolet curing: under the environment that the curing temperature is 20 ℃, the passing light intensity is 8mW/cm2Ultraviolet light polymerization ofAnd the polymerization time is 6min, and the PDLC light-adjusting film doped with the nano silver wires is obtained.
Example 4
Step one, preparing a PDLC mixture:
1. the preparation method of the photocuring glue comprises the steps of mixing 5% of hydroxyethyl methacrylate, 1% of methacrylate- β -hydroxyethyl ester, 4% of polyalkyl acrylate borneol, 50% of polyolefin acrylate, 30% of acrylic acrylate oligomer, 7% of silane coupling agent, 1% of 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide, 1% of 2-hydroxy-2-methylphenylpropane-1-one and 1% of 1-hydroxycyclohexyl phenyl ketone according to a proportion under a shading or yellow light environment to obtain the photocuring glue.
2. Selecting a nano silver wire with the diameter of 80nm and the length-diameter ratio of 400nm, and mixing nematic liquid crystal, light curing glue and the nano silver wire according to the weight ratio of 70: 55: 4, and the micro-beads are weighed according to the proportion of 4 per mill of the total mass of the nematic liquid crystal, the photo-curing glue, the micro-beads and the nano silver wires.
3. And (3) carrying out ultrasonic oscillation on the nano silver wire and the light-cured glue for 50min, and centrifuging at 4000r/min to obtain an upper-layer glue solution. And finally, mixing the upper glue solution with nematic liquid crystal and 20 mu m of microbeads, setting the vacuum value to be controlled to be-15 pa, dispersing at the rotating speed of 800r/min for 20min, and dispersing uniformly in vacuum to obtain the PDLC mixture.
Step two, coating: uniformly clamping the PDLC mixture between two layers of transparent conductive plastic films, and uniformly extruding by using a roller to form a thin layer of 20 mu m;
step three, ultraviolet curing: under the environment that the curing temperature is 25 ℃, the passing light intensity is 18mW/cm2And (3) carrying out ultraviolet polymerization, wherein the curing polymerization time is 4min, thus obtaining the PDLC light adjusting film doped with the nano silver wires.
Example 5
Step one, preparing a PDLC mixture:
1. the preparation method of the photocuring glue comprises the steps of mixing 9% of hydroxyethyl methacrylate, 3% of methacrylate- β -hydroxyethyl, 2% of polyalkyl acrylate borneol, 42% of polyolefin acrylate, 35% of acrylic acrylate oligomer, 5% of silane coupling agent, 2% of 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide and 2% of 2-hydroxy-2-methylphenylpropane-1-one in proportion under a shading or yellow light environment to obtain the photocuring glue.
2. Selecting a nano silver wire with the diameter of 40nm and the length-diameter ratio of 300nm, and mixing nematic liquid crystal, light curing glue and the nano silver wire according to the ratio of 55: 45: 5, and the micro-beads are weighed according to the proportion of 4 per mill of the total mass of the nematic liquid crystal, the photo-curing glue, the micro-beads and the nano silver wires.
3. And (3) carrying out ultrasonic oscillation on the nano silver wire and the light-cured glue for 20min, and centrifuging at 3500r/min to obtain an upper-layer glue solution. And finally, mixing the upper glue solution with nematic liquid crystal and 15-micron microbeads, setting the vacuum value to be-15 kpa, dispersing at the rotating speed of 800r/min for 20min, and dispersing uniformly in vacuum to obtain the PDLC mixture.
Step two, coating: uniformly clamping the PDLC mixture between two layers of transparent conductive plastic films, and uniformly extruding by using a roller to form a thin layer of 15 mu m;
step three, ultraviolet curing: under the environment that the curing temperature is 30 ℃, the passing light intensity is 12mW/cm2And (3) carrying out ultraviolet polymerization, wherein the curing polymerization time is 7min, thus obtaining the PDLC liquid crystal dimming film doped with the nano silver wires.
Example 6
Step one, preparing a PDLC mixture:
1. the preparation of the photo-curing glue is the same as that of example 1;
2. selecting a nano silver wire with the diameter of 40nm and the length-diameter ratio of 200nm, and mixing nematic liquid crystal, light curing glue and the nano silver wire according to the weight ratio of 60: 55: 5, and the micro-beads are weighed according to the proportion of 4 per mill of the total mass of the nematic liquid crystal, the photo-curing glue, the micro-beads and the nano silver wires.
3. And (3) carrying out ultrasonic oscillation on the weighed nano silver wires, the light-cured glue solution, the nematic liquid crystal and 15-micron microbeads for 35min, centrifuging at 2500r/min to obtain an upper glue solution, adding the microbeads, and uniformly stirring to obtain the PDLC mixture.
Step two, coating: uniformly clamping the PDLC mixture between two layers of transparent conductive plastic films, and uniformly extruding by using a roller to form a thin layer of 15 mu m;
step three, ultraviolet curing: under the environment that the curing temperature is 24 ℃, the passing light intensity is 17mW/cm2And (3) carrying out ultraviolet polymerization, wherein the curing polymerization time is 7min, thus obtaining the PDLC liquid crystal dimming film doped with the nano silver wires.
And (3) performance testing:
example 1 of the present invention is the best embodiment, the liquid crystal light adjusting film prepared in example 1 and the liquid crystal light adjusting film without adding nano silver wire are tested for transmittance and haze, and the comparison results are shown in fig. 1 and fig. 2. The comparison result shows that the transmittance and haze performance of the liquid crystal light adjusting film prepared by the invention are obviously superior to those of the liquid crystal light adjusting film without the nano silver wire.
After the liquid crystal dimming film sample added with the nano silver wire prepared in the embodiment 1 is cycled for 10 ten thousand times for 5 seconds, the light transmittance and the haze are tested, the electrification performance of the sample is normal, and the photoelectric performance is basically maintained unchanged; after the liquid crystal dimming film sample added with the nano silver wire is subjected to 5s on and 5s off test for 240h under the high-temperature and high-humidity environment with the temperature of 60 ℃ and the RH percent of 95, the light transmittance and haze test is carried out, the electrifying performance of the sample is normal, the photoelectricity performance is basically maintained unchanged, and the test results are shown in fig. 3 and 4.
The PDLC mixture containing the nano silver wires can effectively disperse the nano silver wires into an organic solvent, can effectively reduce the driving voltage of the PDLC light modulation film and improve the photoelectric property of the liquid crystal light modulation film, and the preparation method is relatively simple and easy to operate, and is suitable for wide application and popularization.
Finally, it should be noted that: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.
Claims (10)
1. The PDLC mixture containing the nano silver wires is characterized by comprising nematic liquid crystal, light-cured glue, microbeads and the nano silver wires, wherein the usage ratio of the nematic liquid crystal to the light-cured glue to the nano silver wires is (50-70): (40-55): (1-8), wherein the micro-beads are nematic liquid crystal, photo-curing glue, 2-6 per mill of the total mass of the micro-beads and the nano silver wires.
2. The PDLC mixture containing nano-silver wires as claimed in claim 1, wherein the diameter of the nano-silver wires is within the range of 20-100 nm, and the aspect ratio is within the range of 30-500 nm.
3. The PDLC mixture containing nano silver wires as claimed in claim 1 or 2, wherein said photo-curable glue comprises the following components in mass percent:
4. the PDLC mixture containing nano silver wires as claimed in claim 3, wherein the photoinitiator is any one or a combination of 2,4, 6-trimethylbenzoyl-diphenylphosphine oxide, 2-hydroxy-2-methylphenylpropane-1-one and 1-hydroxycyclohexylphenylketone.
5. The PDLC mixture containing nano-silver wires of claim 4, wherein said photo-curable glue comprises the following components by mass percent:
6. the PDLC mixture containing nano-silver wires according to claim 1, 2,4 or 5, wherein the particle size of said micro-beads is 7-30 μm.
7. A preparation method of a liquid crystal dimming film containing a nano silver wire PDLC mixture is characterized by comprising the following steps:
step one, preparing a PDLC mixture: weighing the raw materials according to the proportion of any one of claims 1 to 6, mixing the light-cured glue and the nano-silver wires by ultrasonic oscillation, centrifuging, taking the upper glue solution, adding the nematic liquid crystal and the microbeads, and uniformly dispersing in vacuum to obtain a PDLC mixture; or mixing the nematic liquid crystal, the light-cured glue and the nano-silver wires by ultrasonic oscillation, centrifuging, taking the upper glue solution, adding the micro-beads, and uniformly stirring to obtain a PDLC mixture;
step two, coating: uniformly clamping the PDLC mixture between two layers of conductive plastic films, and forming a thin layer of 7-30 mu m after uniform extrusion by a roller;
step three, ultraviolet curing: and preparing the nano silver wire doped PDLC film by ultraviolet polymerization at the temperature of 20-35 ℃.
8. The method for preparing a liquid crystal dimming film containing a nano silver wire PDLC mixture according to claim 7, wherein the ultrasonic oscillation time in the first step is 10-50 min, the centrifugal rotation speed is 1000-5000 r/min, the vacuum value is controlled to be-20 to-5 kpa, the dispersion rotation speed is 500-1000 r/min, and the dispersion time is 10-30 min.
9. The method for preparing a liquid crystal dimming film containing a nano silver wire PDLC mixture according to claim 7, wherein the ultraviolet light intensity in the third step is 3-20mw/cm2The polymerization time is 3-8 min.
10. A liquid crystal light adjusting film comprising a nano silver wire PDLC mixture, characterized by the product made according to any of claims 7-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911223185.1A CN110964217A (en) | 2019-12-03 | 2019-12-03 | PDLC mixture containing nano silver wires, liquid crystal dimming film and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911223185.1A CN110964217A (en) | 2019-12-03 | 2019-12-03 | PDLC mixture containing nano silver wires, liquid crystal dimming film and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110964217A true CN110964217A (en) | 2020-04-07 |
Family
ID=70032733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911223185.1A Pending CN110964217A (en) | 2019-12-03 | 2019-12-03 | PDLC mixture containing nano silver wires, liquid crystal dimming film and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110964217A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111995836A (en) * | 2020-08-11 | 2020-11-27 | 五邑大学 | Polymer dispersed liquid crystal, preparation method and application |
| CN112631007A (en) * | 2020-12-18 | 2021-04-09 | 天津宝兴威科技股份有限公司 | Preparation method of liquid crystal light adjusting film |
| CN114479750A (en) * | 2022-01-25 | 2022-05-13 | 东莞市派乐玛新材料技术开发有限公司 | High-adhesion PDLC composition and preparation method and application thereof |
| CN115407572A (en) * | 2022-11-01 | 2022-11-29 | 合肥精卓光电有限责任公司 | Light modulation valve and light modulation glass assembly |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106353911A (en) * | 2016-11-03 | 2017-01-25 | 珠海兴业应用材料科技有限公司 | Low driving voltage dimming film and preparation method thereof |
| CN107011923A (en) * | 2017-05-04 | 2017-08-04 | 北京科技大学 | A kind of preparation method of carbon nano tube-doped polymer dispersed liquid crystal film |
| KR20180080849A (en) * | 2017-01-05 | 2018-07-13 | 재단법인 구미전자정보기술원 | Apparatus and method for manufacturing smart window film |
| CN108372313A (en) * | 2018-03-25 | 2018-08-07 | 湖南皓志纳米技术有限公司 | Line footpath is distributed the preparation method of small nano-silver thread dispersion liquid and its electrically conductive ink |
| CN109517106A (en) * | 2019-01-03 | 2019-03-26 | 李林 | A kind of PDLC raw material and PDLC dimming glass manufacturing method |
-
2019
- 2019-12-03 CN CN201911223185.1A patent/CN110964217A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106353911A (en) * | 2016-11-03 | 2017-01-25 | 珠海兴业应用材料科技有限公司 | Low driving voltage dimming film and preparation method thereof |
| KR20180080849A (en) * | 2017-01-05 | 2018-07-13 | 재단법인 구미전자정보기술원 | Apparatus and method for manufacturing smart window film |
| CN107011923A (en) * | 2017-05-04 | 2017-08-04 | 北京科技大学 | A kind of preparation method of carbon nano tube-doped polymer dispersed liquid crystal film |
| CN108372313A (en) * | 2018-03-25 | 2018-08-07 | 湖南皓志纳米技术有限公司 | Line footpath is distributed the preparation method of small nano-silver thread dispersion liquid and its electrically conductive ink |
| CN109517106A (en) * | 2019-01-03 | 2019-03-26 | 李林 | A kind of PDLC raw material and PDLC dimming glass manufacturing method |
Non-Patent Citations (1)
| Title |
|---|
| 王海宏等: "《平板显示释疑手册 第1辑》", 31 December 2016 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111995836A (en) * | 2020-08-11 | 2020-11-27 | 五邑大学 | Polymer dispersed liquid crystal, preparation method and application |
| CN111995836B (en) * | 2020-08-11 | 2022-11-08 | 五邑大学 | Polymer dispersed liquid crystal, preparation method and application |
| CN112631007A (en) * | 2020-12-18 | 2021-04-09 | 天津宝兴威科技股份有限公司 | Preparation method of liquid crystal light adjusting film |
| CN114479750A (en) * | 2022-01-25 | 2022-05-13 | 东莞市派乐玛新材料技术开发有限公司 | High-adhesion PDLC composition and preparation method and application thereof |
| CN114479750B (en) * | 2022-01-25 | 2023-10-03 | 东莞市派乐玛新材料技术开发有限公司 | High-adhesion PDLC composition and preparation method and application thereof |
| CN115407572A (en) * | 2022-11-01 | 2022-11-29 | 合肥精卓光电有限责任公司 | Light modulation valve and light modulation glass assembly |
| CN115407572B (en) * | 2022-11-01 | 2023-02-03 | 合肥精卓光电有限责任公司 | Light modulation valve and light modulation glass assembly |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110964217A (en) | PDLC mixture containing nano silver wires, liquid crystal dimming film and preparation method thereof | |
| CN100487076C (en) | Process for preparing high polymer dispersed liquid crystal film material | |
| CN101225308B (en) | Method for preparing polymer dispersion liquid crystal material by ultraviolet-heating step-polymerization process | |
| CN101430449B (en) | Polymer dispersion liquid crystal piezo-optical effect film and manufacturing method and use thereof | |
| CN100406987C (en) | Preparation method of polymer dispersed liquid crystal film | |
| CN107430301A (en) | Display element | |
| CN103525316B (en) | Seal agent and display device | |
| Jinqian et al. | Polymer dispersed liquid crystals doped with CeO2 nanoparticles for the smart window | |
| CN101121887A (en) | Preparation method for polymer dispersion liquid crystal thin film | |
| CN108504363A (en) | A kind of low driving voltage polymer dispersed liquid-crystal film | |
| CN109324433A (en) | A kind of polymer dispersed liquid-crystal film and preparation method thereof of dopen Nano particle | |
| CN106632883B (en) | Preparation method of intelligent display film with switchable visual angle | |
| CN110095896A (en) | A kind of preparation method of the light modulation film based on Liquid Crystal/Polymer composite material | |
| Zhang et al. | Studies on electro‐optical properties of polymer matrix/LC/ITO nanoparticles composites | |
| Zhang et al. | Fluorescence enhancement of quantum dots from the titanium dioxide/liquid crystals/polymer composite films | |
| WO2018072399A1 (en) | Method for preparing intelligent display film having switchable viewing angle and composite film containing display film | |
| CN105242440B (en) | The preparation method of PDLC films | |
| CN108276750B (en) | Light diffusion master batch, PET film and preparation method | |
| CN102967962B (en) | Transparent polymer dispersed liquid crystal display device and manufacturing method and application thereof | |
| Ouyang et al. | Preparation of refractive-index-controlled silicone microspheres and their application in polycarbonate light diffusing materials | |
| CN107011923A (en) | A kind of preparation method of carbon nano tube-doped polymer dispersed liquid crystal film | |
| CN109897644A (en) | A kind of high contrast, low voltage drive and quick response electrically-controlled liquid crystal light modulation film and preparation method thereof | |
| Jia et al. | The Electro-optical study of Al2O3 nanoparticles doped polymer dispersed liquid crystal films | |
| Takei et al. | Nanoparticle free polymer blends for light scattering films in liquid crystal displays | |
| WO2023124675A1 (en) | Optical assembly and electronic device comprising same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200407 |
|
| RJ01 | Rejection of invention patent application after publication |