CN113589573B - Intelligent liquid crystal dimming film capable of sensing ambient light change - Google Patents
Intelligent liquid crystal dimming film capable of sensing ambient light change Download PDFInfo
- Publication number
- CN113589573B CN113589573B CN202110714202.2A CN202110714202A CN113589573B CN 113589573 B CN113589573 B CN 113589573B CN 202110714202 A CN202110714202 A CN 202110714202A CN 113589573 B CN113589573 B CN 113589573B
- Authority
- CN
- China
- Prior art keywords
- liquid crystal
- chiral
- dimming film
- light
- transparent conductive
- 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.)
- Active
Links
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 120
- 230000008859 change Effects 0.000 title claims abstract description 34
- 239000000758 substrate Substances 0.000 claims abstract description 78
- 229920000642 polymer Polymers 0.000 claims abstract description 33
- 239000004986 Cholesteric liquid crystals (ChLC) Substances 0.000 claims abstract description 32
- 230000002441 reversible effect Effects 0.000 claims abstract description 31
- 239000002019 doping agent Substances 0.000 claims abstract description 30
- 239000002131 composite material Substances 0.000 claims abstract description 28
- 239000000203 mixture Substances 0.000 claims abstract description 27
- 230000004043 responsiveness Effects 0.000 claims abstract description 16
- 239000000178 monomer Substances 0.000 claims abstract description 14
- 239000004988 Nematic liquid crystal Substances 0.000 claims abstract description 13
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 10
- 239000003999 initiator Substances 0.000 claims abstract description 7
- 230000003287 optical effect Effects 0.000 claims description 39
- 230000009471 action Effects 0.000 claims description 14
- 239000003795 chemical substances by application Substances 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 13
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 claims description 9
- 125000006850 spacer group Chemical group 0.000 claims description 9
- 239000011259 mixed solution Substances 0.000 claims description 8
- 239000004793 Polystyrene Substances 0.000 claims description 6
- 239000003292 glue Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 229920002223 polystyrene Polymers 0.000 claims description 6
- WSFMFXQNYPNYGG-UHFFFAOYSA-M dimethyl-octadecyl-(3-trimethoxysilylpropyl)azanium;chloride Chemical group [Cl-].CCCCCCCCCCCCCCCCCC[N+](C)(C)CCC[Si](OC)(OC)OC WSFMFXQNYPNYGG-UHFFFAOYSA-M 0.000 claims description 5
- 230000001678 irradiating effect Effects 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- -1 2, 6-difluoro-3-pyrrolophenyltitanocene Chemical compound 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- JLAHZLYPMQUDPQ-UHFFFAOYSA-N (2,4,6-trimethylphenyl)-tris(2,4,6-trimethylbenzoyl)silylmethanone Chemical compound CC1=C(C(=O)[Si](C(C2=C(C=C(C=C2C)C)C)=O)(C(C2=C(C=C(C=C2C)C)C)=O)C(C2=C(C=C(C=C2C)C)C)=O)C(=CC(=C1)C)C JLAHZLYPMQUDPQ-UHFFFAOYSA-N 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 239000004005 microsphere Substances 0.000 claims description 2
- 238000007699 photoisomerization reaction Methods 0.000 abstract description 4
- 238000005034 decoration Methods 0.000 abstract description 2
- 230000008447 perception Effects 0.000 abstract description 2
- 230000005684 electric field Effects 0.000 description 16
- 238000002834 transmittance Methods 0.000 description 16
- 230000000694 effects Effects 0.000 description 15
- 230000001105 regulatory effect Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 235000005811 Viola adunca Nutrition 0.000 description 5
- 240000009038 Viola odorata Species 0.000 description 5
- 235000013487 Viola odorata Nutrition 0.000 description 5
- 235000002254 Viola papilionacea Nutrition 0.000 description 5
- 238000001035 drying Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 5
- 239000011521 glass Substances 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 239000004642 Polyimide Substances 0.000 description 3
- FQCKIWWAEIOPSD-UHFFFAOYSA-N [3-methyl-4-[4-(6-prop-2-enoyloxyhexoxy)benzoyl]oxyphenyl] 4-(6-prop-2-enoyloxyhexoxy)benzoate Chemical compound C=1C=C(OC(=O)C=2C=CC(OCCCCCCOC(=O)C=C)=CC=2)C(C)=CC=1OC(=O)C1=CC=C(OCCCCCCOC(=O)C=C)C=C1 FQCKIWWAEIOPSD-UHFFFAOYSA-N 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000005286 illumination Methods 0.000 description 3
- 229920001721 polyimide Polymers 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- UWCWUCKPEYNDNV-LBPRGKRZSA-N 2,6-dimethyl-n-[[(2s)-pyrrolidin-2-yl]methyl]aniline Chemical compound CC1=CC=CC(C)=C1NC[C@H]1NCCC1 UWCWUCKPEYNDNV-LBPRGKRZSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- KOMDZQSPRDYARS-UHFFFAOYSA-N cyclopenta-1,3-diene titanium Chemical compound [Ti].C1C=CC=C1.C1C=CC=C1 KOMDZQSPRDYARS-UHFFFAOYSA-N 0.000 description 2
- 230000000977 initiatory effect Effects 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- 244000172533 Viola sororia Species 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000013065 commercial product Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003631 expected effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000006317 isomerization reaction Methods 0.000 description 1
- 230000004298 light response Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
-
- 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
- G02F1/13345—Network or three-dimensional gels
-
- 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
- G02F1/137—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
- G02F1/13718—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on a change of the texture state of a cholesteric liquid crystal
Abstract
The invention belongs to the technical fields of building decoration, intelligent home, electronic curtains, automobile dimming windows and the like, and relates to an intelligent liquid crystal dimming film for sensing ambient light change. The intelligent liquid crystal dimming film comprises a first transparent conductive substrate layer, a cholesteric liquid crystal composition/polymer network composite layer and a second transparent conductive substrate layer which are sequentially overlapped, wherein the cholesteric liquid crystal composition/polymer network composite layer is formed by photo-initiation polymerization of nematic liquid crystal molecules, photo-polymerizable monomers, visible light initiators and chiral photo-switching molecules with reversible light responsiveness and chiral dopants. According to the invention, the common liquid crystal dimming film has the characteristic of ambient light perception by doping chiral molecules with reversible photoisomerization characteristics, so that the novel energy-saving light-regulating liquid crystal intelligent dimming film is realized.
Description
Technical Field
The invention belongs to the technical fields of building decoration, intelligent home, electronic curtains, automobile dimming windows and the like, and particularly relates to a light response liquid crystal intelligent window and a preparation method thereof.
Background
Since the last century, the widespread use of liquid crystal devices has greatly changed people's lives, and liquid crystal molecules have attracted attention from researchers in various countries due to their unique physicochemical properties, and further exploration and improvement of the performance of liquid crystal devices have become one of the hot spots of current research. Among them, a liquid crystal/polymer composite material formed by compositing liquid crystal molecules with a polymer network is favored because of its excellent mechanical properties and stability. The liquid crystal/polymer composite material has various functions and can be used in various fields such as intelligent windows, electronic papers, displays and the like. When the liquid crystal intelligent window is used as the intelligent window, most of the current mainstream technology utilizes the dielectric anisotropy of liquid crystal molecules, and the optical performance of the intelligent window is regulated and controlled by controlling the existence of an electric field applied to two poles of the liquid crystal intelligent window. The method can truly realize the function of the intelligent window, but the intelligent window regulated by the electric field often needs higher driving voltage, and the electric field needs to be continuously applied to maintain the transparent state of the intelligent window, so that the consumption of energy is undoubtedly increased, the energy is not saved, the application occasion of the intelligent window is limited, the risk of short circuit is increased, and the safety is not ensured.
Disclosure of Invention
The invention aims to provide an intelligent liquid crystal dimming film which not only can change the light transmittance of the film by sensing the intensity change of ambient light, but also can realize artificial light transmittance regulation and privacy shielding effects by the presence or absence of an external electric field. The dimming film can be made transparent by irradiation with green light or incandescent light, in which case there is no scattering effect on the incident light; the sunlight, blue-violet light or ultraviolet light is used for irradiating the light, and the dimming film can be changed into a scattering state so as to block incident light; again, the dimming film can be restored to the original transparent state by irradiation with green light or an incandescent lamp. When an external electric field is applied to the anode and the cathode of the substrate, the liquid crystal film can generate strong scattering effect on incident light, the light transmittance at the moment is reduced, and when the applied electric field is removed, the light transmittance of the liquid crystal film can be restored to an initial transparent state. The above cyclic variation may be repeated a plurality of times.
In order to achieve the above-mentioned objective, in one aspect, the present invention provides a smart liquid crystal dimming film for sensing ambient light change, comprising a first transparent conductive substrate layer, a cholesteric liquid crystal composition/polymer network composite layer and a second transparent conductive substrate layer which are sequentially stacked, wherein the cholesteric liquid crystal composition/polymer network composite layer is formed by photo-initiated polymerization of nematic liquid crystal molecules, photo-polymerizable monomers, visible light initiators, chiral photo-switching molecules with reversible photo-responsivity and chiral dopants;
based on the total weight of the cholesteric liquid crystal composition/polymer network composite layer, the content of liquid crystal molecules is 79-97.8wt%, the content of photopolymerizable monomers is 1-10wt%, the content of photoinitiators is 0.1-1wt%, the content of chiral optical switch molecules with reversible light responsiveness is 1-5wt%, and the content of chiral agents is 0.1-5wt%;
the chiral optical switch molecule and the chiral dopant with reversible optical responsivity are selected from left-hand optical switch molecules and right-hand chiral dopants or right-hand chiral switch molecules and left-hand chiral dopants.
The invention further provides a preparation method of the intelligent liquid crystal dimming film for sensing the change of the ambient light, which comprises the following steps:
step one: a vertical orientation agent is utilized to pre-arrange an orientation layer with the function of enabling liquid crystal to be vertically oriented on one surface of the indium tin oxide transparent conductive substrate layer;
step two: the method comprises the steps of bonding the orientation surfaces of the indium tin oxide transparent conductive substrate layers to each other by using glue doped with spacer balls to obtain an empty liquid crystal box, placing the empty liquid crystal box on a hot table, uniformly mixing a photo-polymerizable monomer, liquid crystal molecules, chiral photo-switching molecules with reversible photo-responsiveness, a photo-initiator and dopants with opposite chirality to obtain a mixed solution, and uniformly distributing the mixed solution to the liquid crystal box by utilizing capillary action; and
step three: irradiating the liquid crystal box with visible light with the wavelength of 365-550 nanometers to initiate polymerization reaction to form a cholesteric liquid crystal composition/polymer network composite layer;
the vertical alignment agent is DMOAP or PI.
The technical scheme of the invention has the following beneficial effects:
(1) The invention prepares the liquid crystal dimming film with the light transmittance regulated and controlled along with the change of the environmental light intensity and the external electric field, and the common liquid crystal dimming film has the characteristic of environmental light perception by doping chiral molecules with reversible light isomerization characteristics, so that the novel energy-saving light regulated and controlled liquid crystal intelligent dimming film is realized.
(2) When the regulation and control process is realized, the expected effect can be achieved through common natural light and an incandescent lamp, the use condition is loose, and the regulation and control mode is simple.
(3) When the regulation and control process is realized, the regulation and control process can be realized by sensing the change of the light intensity of the external environment, and the optical performance of the liquid crystal film can be regulated and controlled by an external electric field.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular descriptions of exemplary embodiments of the invention as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the invention.
Fig. 1 shows a schematic configuration of a smart liquid crystal dimming film.
Fig. 2 (a) is a schematic structural view showing a smart liquid crystal dimming film sensing a change in ambient light in a transparent state after being illuminated by green light or an incandescent lamp according to an embodiment of the present invention.
Fig. 2 (b) is a schematic structural diagram showing a smart liquid crystal dimming film sensing a change of ambient light in a scattering state after receiving bluish violet light, ultraviolet light, sun light and a thermal effect due to the light according to an embodiment of the present invention.
Fig. 3 (a) shows a schematic diagram of a smart liquid crystal dimming film powered-off state sensing a change in ambient light according to an embodiment of the present invention.
Fig. 3 (b) shows a schematic diagram of a smart liquid crystal dimming film powered state sensing a change in ambient light according to an embodiment of the present invention.
Fig. 4 is a schematic diagram showing the effect of the intelligent liquid crystal dimming film under different lights:
the method comprises the following steps that (a) an initial state of the intelligent liquid crystal dimming film for sensing the change of ambient light in the regulation and control process is shown, and the intelligent liquid crystal dimming film is in a transparent effect schematic diagram and corresponds to early morning hours with weaker light and lower temperature in real life;
(b) The intelligent liquid crystal dimming film for sensing the change of the ambient light according to the embodiment of the invention has the effects that the light transmittance of the dimming film is reduced and the color is deepened after the dimming film is subjected to sunlight illumination along with the gradual enhancement of sunlight and the gradual rise of temperature in the regulation and control process, and the dimming film is converted into a scattering state, which corresponds to the noon time division with stronger light and higher temperature in real life;
(c) The intelligent liquid crystal dimming film for sensing the change of the ambient light according to the embodiment of the invention has the effects that the light transmittance of the dimming film is increased after the dimming film is illuminated by an incandescent lamp, the color is lightened, and the dimming film is converted into a transparent state in the regulation and control process along with gradual weakening of sunlight and gradual reduction of temperature, and the dimming film corresponds to night time division with weaker light and lower temperature in real life.
Fig. 5 (a) shows a physical diagram of a smart liquid crystal dimming film sensing ambient light change in a transparent state after being illuminated by an incandescent lamp according to an embodiment of the present invention.
Fig. 5 (b) shows a physical diagram of a smart liquid crystal dimming film sensing a change in ambient light in a scattering state after being exposed to sunlight according to an embodiment of the present invention.
Reference numerals
001. First transparent conductive substrate layer
002. First transparent substrate alignment layer
003. Cholesteric liquid crystal composition/polymer network composite layer
A Polymer network
B liquid crystal molecules
C chiral optical switch molecule with reversible light responsiveness
D chiral dopants
004. Second transparent substrate alignment layer
005. Second transparent conductive substrate layer
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the preferred embodiments of the present invention are described below, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein.
In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," etc. indicate or are based on the orientation or positional relationship shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
The invention provides a smart liquid crystal dimming film for sensing ambient light change, which is characterized by comprising a first transparent conductive substrate layer, a cholesteric liquid crystal composition/polymer network composite layer and a second transparent conductive substrate layer which are sequentially overlapped, wherein the cholesteric liquid crystal composition/polymer network composite layer is formed by photo-initiated polymerization of nematic liquid crystal molecules, photo-polymerizable monomers, visible light initiators, chiral optical switch molecules with reversible light responsiveness and chiral dopants;
based on the total weight of the cholesteric liquid crystal composition/polymer network composite layer, the content of liquid crystal molecules is 79-97.8wt%, the content of photopolymerizable monomers is 1-10wt%, the content of photoinitiators is 0.1-1wt%, the content of chiral optical switch molecules with reversible light responsiveness is 1-5wt%, and the content of chiral agents is 0.1-5wt%;
the chiral optical switch molecule and the chiral dopant with reversible optical responsivity are selected from left-hand optical switch molecules and right-hand chiral dopants or right-hand chiral switch molecules and left-hand chiral dopants.
In the above technical solution, when the intelligent liquid crystal dimming film sensing the change of the ambient light is irradiated by sunlight, blue-violet light or ultraviolet light, the transmitted light is distributed in a wider angle range and is in an opaque scattering state when the light is incident; when the intelligent liquid crystal dimming film for sensing the change of the ambient light is irradiated by green light or an incandescent lamp, the transmitted light is distributed in a narrower angle range and is in a transparent state when the light is incident.
According to the invention, by utilizing the characteristic that cholesteric liquid crystals show different optical properties in different phases, two different chiral dopants with opposite chiralities are added into a system, wherein one chiral dopant is a non-photosensitive chiral agent, the other chiral dopant is an opposite chiral optical switch molecule with reversible light responsiveness, at the beginning, the chiral actions of the two chiral agents are mutually counteracted by controlling the content of the two chiral agents, and under the action of a first transparent conductive substrate layer alignment layer and a second transparent conductive substrate layer alignment layer, the liquid crystal molecules are vertically arranged, and the liquid crystal dimming film shows a transparent state in macroscopic view; when sunlight, blue-violet light or ultraviolet light is used for irradiating the light-sensitive chiral switch molecules, the light-sensitive chiral switch molecules are subjected to photoisomerization, the chiral action of the light-sensitive chiral switch molecules is enhanced, the original chiral action balance in the system is broken, nematic liquid crystal is changed into cholesteric liquid crystal under the chiral action, the texture of the liquid crystal is a focal conic texture typical of the cholesteric liquid crystal, and macroscopically, the liquid crystal dimming film has a strong scattering effect on incident light, so that the light regulation and control are realized; when the dimming film is irradiated again by green light or an incandescent lamp, the chiral contribution of the chiral optical switch molecules with reversible light responsiveness can be restored to the initial state, the phase state of the liquid crystal is restored to the vertical state, and the liquid crystal dimming film is restored to the transparent state in macroscopic view. The chiral optical switch molecules have reversible light responsivity, so that the prepared liquid crystal dimming film also has regulation and control repeatability. In addition, when the liquid crystal used in the cholesteric liquid crystal composition/polymer network composite layer is purely negative liquid crystal, the liquid crystal molecules tend to be aligned perpendicular to the direction of the electric field when the negative liquid crystal is in the electric field due to the dielectric anisotropy of the negative liquid crystal, and the long axes of the molecules are parallel to the substrate, so that the incident light has a strong scattering effect, and after the electric field is removed, the liquid crystal molecules are restored to the original field-induced vertical state under the action of the vertical alignment layer on the surface of the substrate layer, so that the light transmittance is increased. The regulation is also repeatable.
In the invention, the cholesteric liquid crystal is limited in each polymer grid, so that the scattering state of the liquid crystal dimming film can be improved, and the stability of the liquid crystal dimming film can be improved.
According to the invention, preferably, the first transparent conductive substrate layer and the second transparent conductive substrate layer are indium tin oxide transparent conductive substrate layers with the same material;
preferably, one side of the indium tin oxide transparent conductive substrate layer is provided with an orientation layer.
Preferably, the substrate is made of at least one of glass, polypropylene, polystyrene, polycarbonate, polymethyl methacrylate and polyethylene terephthalate.
In the invention, in an initial state, under the condition that the cholesteric liquid crystal composition/polymer network composite layer is not stimulated by an external field, the liquid crystal mixture is in ordered vertical orientation, the blocking effect on incident light is not generated, and the dimming film is in a transparent state; when the light is irradiated by sunlight, blue-violet light or ultraviolet light and the temperature rising effect is caused by illumination, the light transmittance is reduced, and the light modulation film is in a scattering state; when the light is irradiated by an incandescent lamp or green light, the light transmittance is increased, and the light modulation film is in a transparent state.
In the invention, if the current environmental conditions are insufficient to enable the cholesteric liquid crystal composition/polymer network composite layer to be converted from a transparent state to a scattering state, but the actual requirements of reducing the light transmittance of the dimming film or the actual application of shielding privacy scenes and the like are met, the dimming film can realize the required functions by externally applying an electric field.
According to the invention, the nematic liquid crystal molecules are preferably selected from positive liquid crystals, preferably selected from at least one of SLC1717, E7, E44, E48 and SLC7011, or negative liquid crystals, preferably selected from SLC10V520-200 and/or SLC12V620-200.
The liquid crystal dimming film prepared from the positive liquid crystal can realize the basic effect of regulating the light transmittance along with the light-heat, and the liquid crystal dimming film prepared from the negative liquid crystal can further regulate the light transmittance of the liquid crystal film through an external electric field besides the effect of regulating the light transmittance along with the light-heat, so that the situation that the light transmittance of the liquid crystal film is not suitable for certain environments is solved, and a user can select one of the two types of liquid crystal films according to the actual demands of the user.
According to the present invention, preferably, the photopolymerizable monomer is a liquid crystalline photopolymerizable monomer selected from at least one of C6M, LC242 and LC 756.
According to the present invention, preferably, the visible light initiator is any one of bis 2, 6-difluoro-3-pyrrolophenyltitanocene, 1-aryl-2- (triisopropylsilyl) ethane-1, 2-dione, and tetrakis (2, 4, 6-trimethylbenzoyl) silane.
According to the invention, preferably, the chiral optical switch molecule with reversible photoresponsivity is synthesized by a laboratory, preferably, as shown in a general formula I, M is selected from a group shown in a general formula II or a general formula III, wherein n is an integer from 1 to 6; or as shown in a general formula IV, M in the general formula IV is selected from a general formula VI of a general formula V, N is selected from a group shown in a general formula VII, and M is an integer of 5-7.
The chiral optical switch molecule with reversible photoresponsivity can generate photoisomerization reversible change from left to right as shown in formula 1 under the illumination of green light or an incandescent lamp; the photoisomerization reaction from right to left as shown in formula 1 can occur under blue-violet light, ultraviolet light or sun light.
According to the present invention, preferably, the optical switch molecule is selected from at least one of chiral compounds of the structure represented by the general formula a-1 or the general formula a-2, and the chirality of the optical switch molecule is related to the spatial conformational characteristics of the molecule of the following general formula; wherein R represents C 1 -C 4 N is an integer from 1 to 6, m is an integer from 5 to 7;
preferably, the chiral optical switch molecule with reversible photoresponsivity is synthesized by a laboratory.
Preferably, the right-handed optical switch molecule has right-handed property, and can convert common nematic liquid crystal into right-handed helical cholesteric liquid crystal.
As a preferable scheme, the left-handed optical switch molecule has left-handed chirality and can convert common nematic liquid crystal into left-handed helical cholesteric liquid crystal
According to the present invention, preferably, the left-handed chiral dopant may be synthesized by itself or at least one selected from commercial products S811, S1011, S2011 or S5011.
Preferably, the left-handed chiral dopant is selected from at least one of commercial products S811, S1011, S2011 and S5011.
According to the present invention, preferably, the right-handed chiral dopant may be synthesized by itself or at least one selected from commercial products R811, R1011, R2011 or R5011.
Preferably, the right-handed chiral dopant is selected from at least one of commercial products R811, R1011, R2011 and R5011.
The second aspect of the invention provides a method for preparing an intelligent liquid crystal dimming film for sensing ambient light change, which comprises the following steps:
step one: a vertical orientation agent is utilized to pre-arrange an orientation layer with the function of enabling liquid crystal to be vertically oriented on one surface of the indium tin oxide transparent conductive substrate layer;
step two: the method comprises the steps of bonding an empty liquid crystal box by using glue doped with spacer balls, placing the liquid crystal box on a hot table, uniformly mixing a photo-polymerizable monomer, liquid crystal molecules, chiral photo-switching molecules with reversible light responsiveness, a photoinitiator and a chiral agent uniformly to obtain a mixed solution, and uniformly distributing the mixed solution on the liquid crystal box by utilizing capillary action; and
step three: irradiating the liquid crystal box with visible light with the wavelength of 365-550 nanometers to initiate polymerization reaction to form a cholesteric liquid crystal composition/polymer network composite layer;
the vertical alignment agent is DMOAP or PI.
According to the invention, preferably, the spacer balls are polystyrene microspheres, the particle size is controlled to be 6-20 microns, and the dosage is 0.1-1.0wt% of the content of the mixed solution;
preferably, the temperature of the hot stage is 90-120 ℃;
preferably, the visible light is green light.
The invention is further illustrated by the following examples:
example 1
According to an embodiment of the present invention, referring to fig. 1, the smart liquid crystal dimming film for sensing the change of ambient light includes a first transparent conductive substrate layer 001, a first transparent substrate alignment layer 002, a cholesteric liquid crystal composition/polymer network composite layer 003, a second transparent substrate alignment layer 004 and a second transparent conductive substrate layer 005 which are stacked; the material for forming the cholesteric liquid crystal composition/polymer network composite layer comprises a polymer network A, liquid crystal molecules B, chiral optical switch molecules C with reversible optical responsivity and a left-handed chiral dopant D.
Firstly, cutting a first transparent conductive substrate and a second transparent conductive substrate which are made of glass materials to a proper size, washing the first transparent conductive substrate and the second transparent conductive substrate, drying the first transparent conductive substrate and the second transparent conductive substrate, uniformly spreading a polyimide vertical alignment agent on the surface of the substrate by using a spin coater, wherein the polyimide vertical alignment agent is a common commercial product, curing the polyimide vertical alignment agent at a high temperature of 200 ℃ to obtain a first transparent conductive substrate layer and a second transparent conductive substrate layer with vertical alignment layers, oppositely placing alignment surfaces, bonding the two substrates by using glue doped with a polystyrene spacer with a particle size of 6 microns, obtaining an empty liquid crystal box, and placing the empty liquid crystal box on a hot table at a temperature of between 90 and 120 ℃.1wt% of 1, 4-bis [4- (6-acryloyloxyhexyloxy) benzoyloxy ] -2-methylbenzene, 2wt% of chiral optical switch molecules with reversible light responsiveness, 0.4wt% of left chiral dopant S5011, 0.1wt% of bis 2, 6-difluoro-3-pyrrolopyrrole titanocene and 96.5wt% of nematic liquid crystal slc1717 are taken, uniformly mixed in a dark place, and then poured into a liquid crystal box by utilizing capillary action. And (3) initiating polymerization reaction under the irradiation of green light with the wavelength of 520nm to obtain the intelligent liquid crystal dimming film 1 for sensing the change of the ambient light. When the obtained light modulation film is irradiated by sunlight, blue light or ultraviolet light, the light modulation film is changed from a transparent state to a scattering state; when the resulting dimming film is irradiated with green light or an incandescent lamp, the dimming film changes from a scattering state to a transparent state.
Example 2
Firstly, cutting a first transparent conductive substrate and a second transparent conductive substrate which are made of glass materials to a proper size, washing the first transparent conductive substrate and the second transparent conductive substrate, drying the first transparent conductive substrate and the second transparent conductive substrate, soaking the first transparent conductive substrate and the second transparent conductive substrate in a 5wt% DMOAP solution at 80 ℃ for 2 hours, drying the first transparent conductive substrate and the second transparent conductive substrate to obtain the first transparent conductive substrate and the second transparent conductive substrate with vertical orientation layers, placing orientation surfaces of the first transparent conductive substrate and the second transparent conductive substrate opposite to each other, bonding the two substrates by using glue doped with polystyrene spacers with the particle size of 12 microns to obtain an empty liquid crystal box, and placing the empty liquid crystal box on a heat table at 90-120 ℃.3wt% of 1, 4-bis [4- (6-acryloyloxyhexyloxy) benzoyloxy ] -2-methylbenzene, 3wt% of chiral optical switch molecules with reversible light responsiveness, 0.3wt% of left chiral dopant S5011, 0.1wt% of bis 2, 6-difluoro-3-pyrrolopyrrole titanocene and 93.6wt% of nematic liquid crystal slc1717 are taken, uniformly mixed in a dark place, and then poured into a liquid crystal box by utilizing capillary action. And (3) initiating polymerization reaction under the irradiation of green light with the wavelength of 520nm to obtain the intelligent liquid crystal dimming film 2 for sensing the change of ambient light, wherein the internal structure of the dimming film is shown in figure 1. When the obtained light modulation film is irradiated by sunlight, blue light or ultraviolet light, the light modulation film is changed from a transparent state to a scattering state; when the resulting dimming film is irradiated with green light or an incandescent lamp, the dimming film changes from a scattering state to a transparent state. The control principle is shown in fig. 3 (a) -3 (b), and the physical effect is shown in fig. 5 (a) -5 (b).
Example 3
Firstly, cutting a first transparent conductive substrate and a second transparent conductive substrate which are made of glass materials to a proper size, washing the first transparent conductive substrate and the second transparent conductive substrate, drying the first transparent conductive substrate and the second transparent conductive substrate, soaking the first transparent conductive substrate and the second transparent conductive substrate in a 5wt% DMOAP solution at 80 ℃ for 2 hours, drying the first transparent conductive substrate and the second transparent conductive substrate to obtain the first transparent conductive substrate and the second transparent conductive substrate with vertical orientation layers, placing orientation surfaces of the first transparent conductive substrate and the second transparent conductive substrate opposite to each other, bonding the two substrates by using glue doped with polystyrene spacers with the particle size of 12 microns to obtain an empty liquid crystal box, and placing the empty liquid crystal box on a heat table at 90-120 ℃.3wt% of 1, 4-bis [4- (6-acryloyloxyhexyloxy) benzoyloxy ] -2-methylbenzene, 3wt% of chiral optical switch molecules with reversible photoresponsivity, 5wt% of left chiral dopant S811, 0.1wt% of bis 2, 6-difluoro-3-pyrrolyl titanocene and 93.6wt% of nematic liquid crystal SLC12V620-200 are taken, uniformly mixed in a dark place, and then poured into a liquid crystal box by utilizing capillary action. The polymerization reaction is initiated under the irradiation of green light with the wavelength of 520nm, and the intelligent liquid crystal dimming film 3 for sensing the change of the ambient light is prepared, and the internal structure of the dimming film is shown in figure 1. When a large enough electric field is applied to the substrate, the negative liquid crystal tends to align with the parallel substrate along the molecular long axis under the action of the electric field, so that the light is strongly scattered, the light transmittance is greatly reduced, and the dimming film is in an opaque state; if the electric field is removed, the liquid crystal molecules are restored to the previous field vertical state under the anchoring action of the orientation layer on the inner surface of the substrate and the polymer network, and the dimming film is in a transparent state, and the regulating and controlling principle is shown in figure 4.
According to the embodiment of the invention, the intelligent liquid crystal dimming film for sensing the change of the ambient light has good optical performance, and the thickness of the cholesteric liquid crystal composition/polymer network composite layer 003 in the intelligent liquid crystal dimming film can be 6-20 micrometers, and the thickness can be changed along with the change of the content of the added chiral optical switch molecule with reversible light responsiveness. If the thickness of the cholesteric liquid crystal composition/polymer network composite layer 003 is less than 6 micrometers, the scattering effect of the cholesteric liquid crystal composition/polymer network composite layer 003 in a scattering state is not obvious; if the thickness of the cholesteric liquid crystal composition/polymer network composite layer 003 is greater than 20 micrometers, the transmission effect of the transparent cholesteric liquid crystal composition/polymer network composite layer 003 is not apparent.
According to the embodiment of the present invention, referring to fig. 3 (a) -3 (b), when the intelligent liquid crystal dimming film for sensing the change of ambient light realizes reversible light regulation, the specific type of the external light source used is not limited, so long as the chiral optical switch molecule with reversible light responsiveness contained in the cholesteric liquid crystal composition/polymer network composite layer can be photo-isomerized, the liquid crystal phase is changed accordingly, and finally the optical characteristic of the dimming film is changed, so that a person skilled in the art can select the type of the light source according to the actual light regulation effect required by display.
The foregoing description of embodiments of the invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described.
Claims (10)
1. The intelligent liquid crystal dimming film for sensing the change of ambient light is characterized by comprising a first transparent conductive substrate layer, a cholesteric liquid crystal composition/polymer network composite layer and a second transparent conductive substrate layer which are sequentially overlapped, wherein the cholesteric liquid crystal composition/polymer network composite layer is formed by photo-initiated polymerization of nematic liquid crystal molecules, photo-polymerizable monomers, visible light initiators, chiral optical switch molecules with reversible light responsiveness and chiral dopants;
based on the total weight of the cholesteric liquid crystal composition/polymer network composite layer, the content of nematic liquid crystal molecules is 79-97.8wt%, the content of photo-polymerizable monomers is 1-10wt%, the content of photoinitiators is 0.1-1wt%, the content of chiral photo-switching molecules with reversible photo-responsiveness is 1-5wt%, and the content of chiral dopants is 0.1-5wt%;
the chiral optical switch molecule and the chiral dopant with reversible optical responsivity are selected from left-hand optical switch molecules and right-hand chiral dopants or right-hand optical switch molecules and left-hand chiral dopants;
the chiral optical switch molecule with reversible photoresponsivity is selected from at least one of chiral compounds with a structure shown in a general formula a-1 or a general formula a-2, and the chirality of the optical switch molecule is related to the spatial conformational characteristics of the molecules with the following general formulas; wherein R represents C 1 -C 4 N is an integer from 1 to 6, m is an integer from 5 to 7;
the general formula a-1 is shown in the specification,
general formula a-2.
2. The intelligent liquid crystal dimming film for sensing ambient light variation according to claim 1, wherein the first transparent conductive substrate layer and the second transparent conductive substrate layer are indium tin oxide transparent conductive substrate layers with the same material;
an orientation layer is arranged on one surface of the indium tin oxide transparent conductive substrate layer.
3. The ambient light change-aware smart liquid crystal dimming film of claim 1, wherein the nematic liquid crystal molecules are selected from positive liquid crystals or negative liquid crystals.
4. The ambient light change aware smart liquid crystal dimming film of claim 3, wherein the positive liquid crystal is selected from at least one of SLC1717, E7, E44, E48 and SLC 7011.
5. A smart liquid crystal dimming film for sensing ambient light variation as claimed in claim 3, wherein the negative liquid crystal is selected from SLC10V520-200 and/or SLC12V620-200.
6. The ambient light change aware smart liquid crystal dimming film of claim 1, wherein the photo-polymerizable monomer is a liquid crystalline photo-polymerizable monomer selected from at least one of C6M, LC242 and LC 756.
7. The smart liquid crystal dimming film for sensing ambient light variation as claimed in claim 1, wherein the visible light initiator is at least one of bis 2, 6-difluoro-3-pyrrolophenyltitanocene, 1-aryl-2- (triisopropylsilyl) ethane-1, 2-dione, tetra (2, 4, 6-trimethylbenzoyl) silane.
8. The smart liquid crystal dimming film for sensing ambient light variation as claimed in claim 1, wherein the left chiral dopant is selected from at least one of S811, S1011, S2011 and S5011, and the right chiral dopant is selected from at least one of R811, R1011, R2011 and R5011.
9. A method for preparing the intelligent liquid crystal dimming film for sensing the change of the ambient light according to any one of claims 1 to 8, which is characterized by comprising the following steps:
step one: a vertical orientation agent is utilized to pre-arrange an orientation layer with the function of enabling liquid crystal to be vertically oriented on one surface of the indium tin oxide transparent conductive substrate layer;
step two: the method comprises the steps of bonding the surfaces, provided with the orientation layers, of the indium tin oxide transparent conductive substrate layers by using glue doped with spacer balls to obtain an empty liquid crystal box, placing the empty liquid crystal box on a heat table, uniformly mixing a photo-polymerizable monomer, liquid crystal molecules, chiral photo-switching molecules with reversible photo-responsiveness, a photoinitiator and dopants with opposite chirality to obtain a mixed solution, and uniformly distributing the mixed solution to the liquid crystal box by utilizing capillary action; and
step three: irradiating the liquid crystal box with visible light with the wavelength of 365-550 nanometers to initiate polymerization reaction to form a cholesteric liquid crystal composition/polymer network composite layer;
the vertical alignment agent is DMOAP and/or PI.
10. The preparation method of claim 9, wherein the spacer spheres are polystyrene microspheres with a particle size of 6-20 microns and the amount of the spacer spheres is 0.1-1.0wt% of the content of the mixed solution;
the temperature of the hot stage is 90-120 ℃;
the visible light is green light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110714202.2A CN113589573B (en) | 2021-06-25 | 2021-06-25 | Intelligent liquid crystal dimming film capable of sensing ambient light change |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110714202.2A CN113589573B (en) | 2021-06-25 | 2021-06-25 | Intelligent liquid crystal dimming film capable of sensing ambient light change |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113589573A CN113589573A (en) | 2021-11-02 |
| CN113589573B true CN113589573B (en) | 2024-01-16 |
Family
ID=78244688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110714202.2A Active CN113589573B (en) | 2021-06-25 | 2021-06-25 | Intelligent liquid crystal dimming film capable of sensing ambient light change |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113589573B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011139319A1 (en) * | 2010-05-03 | 2011-11-10 | Kent State University | Smart photochromic chiral nematic liquid crystal window |
| TW201217502A (en) * | 2010-10-29 | 2012-05-01 | Ind Tech Res Inst | Liquid crystal composition and liquid crystal display employing the same |
| CN106526945A (en) * | 2016-12-16 | 2017-03-22 | 北京大学 | Liquid crystal light adjusting film with temperature control and electric control functions and preparation method thereof |
| CN106699960A (en) * | 2015-11-17 | 2017-05-24 | 大连智敏新材料科技有限公司 | Temperature-controlled dimming film and stepwise polymerization preparation method thereof |
| CN106886103A (en) * | 2017-03-06 | 2017-06-23 | 京东方科技集团股份有限公司 | Optical compensating film and preparation method thereof |
| CN109270712A (en) * | 2018-09-19 | 2019-01-25 | 北京化工大学 | A kind of liquid crystal film and its preparation method and application |
| TW202009293A (en) * | 2018-08-29 | 2020-03-01 | 國立中央大學 | Switchable cholesterol liquid crystal device with low energy consumption capable of viewing the high-contrast image presented by a portable electronic device with the lowest power consumption |
| CN111929950A (en) * | 2020-08-30 | 2020-11-13 | 南京优写智能科技有限公司 | Preparation method of refractive index-adjustable nanofiber stable liquid crystal film writing board |
| CN112239624A (en) * | 2020-07-22 | 2021-01-19 | 浙江伟星光学有限公司 | Ophthalmic lens comprising a visible light-cured color-changing coating |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8199086B2 (en) * | 2004-01-28 | 2012-06-12 | Kent Displays Incorporated | Stacked color photodisplay |
| US7642035B2 (en) * | 2006-04-13 | 2010-01-05 | Industrial Technology Research Institute | Sensitized photochemical switching for cholesteric liquid crystal displays |
| CN103289710A (en) * | 2013-05-31 | 2013-09-11 | 京东方科技集团股份有限公司 | Blue-phase liquid-crystal composite material and liquid crystal display containing same |
-
2021
- 2021-06-25 CN CN202110714202.2A patent/CN113589573B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011139319A1 (en) * | 2010-05-03 | 2011-11-10 | Kent State University | Smart photochromic chiral nematic liquid crystal window |
| TW201217502A (en) * | 2010-10-29 | 2012-05-01 | Ind Tech Res Inst | Liquid crystal composition and liquid crystal display employing the same |
| CN106699960A (en) * | 2015-11-17 | 2017-05-24 | 大连智敏新材料科技有限公司 | Temperature-controlled dimming film and stepwise polymerization preparation method thereof |
| CN106526945A (en) * | 2016-12-16 | 2017-03-22 | 北京大学 | Liquid crystal light adjusting film with temperature control and electric control functions and preparation method thereof |
| CN106886103A (en) * | 2017-03-06 | 2017-06-23 | 京东方科技集团股份有限公司 | Optical compensating film and preparation method thereof |
| TW202009293A (en) * | 2018-08-29 | 2020-03-01 | 國立中央大學 | Switchable cholesterol liquid crystal device with low energy consumption capable of viewing the high-contrast image presented by a portable electronic device with the lowest power consumption |
| CN109270712A (en) * | 2018-09-19 | 2019-01-25 | 北京化工大学 | A kind of liquid crystal film and its preparation method and application |
| CN112239624A (en) * | 2020-07-22 | 2021-01-19 | 浙江伟星光学有限公司 | Ophthalmic lens comprising a visible light-cured color-changing coating |
| CN111929950A (en) * | 2020-08-30 | 2020-11-13 | 南京优写智能科技有限公司 | Preparation method of refractive index-adjustable nanofiber stable liquid crystal film writing board |
Non-Patent Citations (2)
| Title |
|---|
| 1,2-Dithienyldicyanoethene-Based, Visible-Light-Driven, Chiral Fluorescent Molecular Switch: Rewritable Multimodal Photonic Devices;Juntao Li，Hari Krishna Bisoyi，Siyang Lin,Jinbao Guo，Quan Li;A Joumal of the German Chemical Society;第58卷(第45期);16052-16056 * |
| Near-infrared light-induced photoisomerization and photodissociation of a chiral fluorescent photoswitch in cholesteric liquid crystals assisted by upconversion nanoparticles;Ao Juan,Siyang Lin,Yanrong He,Qingyan Fan, Jinbao Guo;The Royal Society of Chemistry 2021;第17卷(第5期);1404-1408 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113589573A (en) | 2021-11-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9063358B2 (en) | Smart photochromic chiral nematic liquid crystal window | |
| KR101689902B1 (en) | Wide temperature-range smectic liquid crystal materials | |
| CN106646985B (en) | Infrared reflecting device with tunable wave band and preparation method thereof | |
| CN108415204B (en) | Multistable electric response intelligent window and preparation method thereof | |
| Nasir et al. | Polymer-dispersed liquid-crystal-based switchable glazing fabricated via vacuum glass coupling | |
| WO2009111919A1 (en) | Electrically controlled medium for modulating light | |
| Shen et al. | Recent progress in liquid crystal‐based smart windows: materials, structures, and design | |
| TWI579370B (en) | Switching element containing a liquid-crystalline medium | |
| EP2692828A1 (en) | Liquid crystal element and liquid crystal composition | |
| CN108761945B (en) | Electric response liquid crystal dimming device | |
| Cupelli et al. | Electrically switchable chromogenic materials for external glazing | |
| WO2019010889A1 (en) | Electrically controlled smart window, manufacturing method, and light regulation method | |
| Zhang et al. | Research progress of cholesteric liquid crystals with broadband reflection characteristics in application of intelligent optical modulation materials | |
| CN109154734A (en) | Low haze switchable liquid crystal for switchable glazings or the like is arranged | |
| JP2762487B2 (en) | Liquid crystal device | |
| Lin et al. | Polymer‐Stabilized Liquid Crystal Films Containing Dithienyldicyanoethene‐Based Chiral Photoswitch: Multi‐Modulation for Environment‐Adaptative Smart Windows | |
| CN113589573B (en) | Intelligent liquid crystal dimming film capable of sensing ambient light change | |
| CN113311625A (en) | Polymer stabilized cholesteric liquid crystal color-changing glass and preparation method and application thereof | |
| JPH0929882A (en) | Light adjusting material | |
| JP3030973B2 (en) | Liquid crystal display device | |
| CN115161035B (en) | Light response cholesteric liquid crystal gel, preparation method and application thereof | |
| CN113777841B (en) | Reflector and preparation method and application thereof | |
| CN209028381U (en) | A kind of multistable electroresponse smart window | |
| WO2023065925A1 (en) | Liquid crystal dimming device | |
| Yin et al. | Intelligent switchable nanomaterials doped optical switches with PDLC-PVA-PSCLC bilayer liquid crystal structure for smart windows |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |