CN115097676A - Optical film with regional multistage control of light transmittance on full-coverage electrode and preparation method thereof - Google Patents
Optical film with regional multistage control of light transmittance on full-coverage electrode and preparation method thereof Download PDFInfo
- Publication number
- CN115097676A CN115097676A CN202210697482.5A CN202210697482A CN115097676A CN 115097676 A CN115097676 A CN 115097676A CN 202210697482 A CN202210697482 A CN 202210697482A CN 115097676 A CN115097676 A CN 115097676A
- Authority
- CN
- China
- Prior art keywords
- liquid crystal
- layer
- light
- optical film
- epoxy
- 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.)
- Granted
Links
- 239000012788 optical film Substances 0.000 title claims abstract description 55
- 238000002834 transmittance Methods 0.000 title claims abstract description 46
- 238000002360 preparation method Methods 0.000 title claims abstract description 26
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 80
- 229920000106 Liquid crystal polymer Polymers 0.000 claims abstract description 35
- 239000004977 Liquid-crystal polymers (LCPs) Substances 0.000 claims abstract description 35
- 239000002131 composite material Substances 0.000 claims abstract description 32
- 239000004593 Epoxy Substances 0.000 claims abstract description 30
- 150000002500 ions Chemical class 0.000 claims abstract description 30
- 239000000758 substrate Substances 0.000 claims abstract description 27
- 125000003700 epoxy group Chemical group 0.000 claims abstract description 24
- 239000000178 monomer Substances 0.000 claims abstract description 16
- 239000011521 glass Substances 0.000 claims abstract description 11
- 239000012952 cationic photoinitiator Substances 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims abstract description 6
- 238000007151 ring opening polymerisation reaction Methods 0.000 claims abstract description 5
- 238000006116 polymerization reaction Methods 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 17
- 230000003287 optical effect Effects 0.000 claims description 12
- 239000010409 thin film Substances 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 9
- 239000010408 film Substances 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 5
- 125000001931 aliphatic group Chemical group 0.000 claims description 4
- 125000003545 alkoxy group Chemical group 0.000 claims description 4
- 125000000217 alkyl group Chemical group 0.000 claims description 4
- 125000000304 alkynyl group Chemical group 0.000 claims description 4
- 125000003118 aryl group Chemical group 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 4
- -1 cyano, methyl Chemical group 0.000 claims description 4
- 125000004185 ester group Chemical group 0.000 claims description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 4
- 229910052736 halogen Inorganic materials 0.000 claims description 4
- 150000002367 halogens Chemical class 0.000 claims description 4
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 claims description 4
- 239000000049 pigment Substances 0.000 claims description 4
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 claims description 3
- 239000004417 polycarbonate Substances 0.000 claims description 3
- 229920000515 polycarbonate Polymers 0.000 claims description 3
- 229920001225 polyester resin Polymers 0.000 claims description 3
- 239000004645 polyester resin Substances 0.000 claims description 3
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims description 2
- 239000012954 diazonium Substances 0.000 claims description 2
- 150000001989 diazonium salts Chemical group 0.000 claims description 2
- 239000011630 iodine Substances 0.000 claims description 2
- 229910052740 iodine Inorganic materials 0.000 claims description 2
- 239000002861 polymer material Substances 0.000 claims description 2
- 230000000379 polymerizing effect Effects 0.000 claims description 2
- 150000003839 salts Chemical class 0.000 claims description 2
- 229910052717 sulfur Inorganic materials 0.000 claims description 2
- 239000011593 sulfur Substances 0.000 claims description 2
- 230000000977 initiatory effect Effects 0.000 abstract 1
- 230000005684 electric field Effects 0.000 description 23
- 229920000642 polymer Polymers 0.000 description 20
- 239000000463 material Substances 0.000 description 13
- 238000001514 detection method Methods 0.000 description 11
- 230000001678 irradiating effect Effects 0.000 description 7
- 238000007142 ring opening reaction Methods 0.000 description 7
- 238000011049 filling Methods 0.000 description 5
- 238000010030 laminating Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 125000002091 cationic group Chemical group 0.000 description 4
- 239000000975 dye Substances 0.000 description 4
- 238000005286 illumination Methods 0.000 description 4
- 239000003999 initiator Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- KTEFLEFPDDQMCB-UHFFFAOYSA-N 1,4-bis(4-butylanilino)-5,8-dihydroxyanthracene-9,10-dione Chemical compound C1=CC(CCCC)=CC=C1NC(C=1C(=O)C2=C(O)C=CC(O)=C2C(=O)C=11)=CC=C1NC1=CC=C(CCCC)C=C1 KTEFLEFPDDQMCB-UHFFFAOYSA-N 0.000 description 1
- DHKVCYCWBUNNQH-UHFFFAOYSA-N 2-[5-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]-1,3,4-oxadiazol-2-yl]-1-(1,4,5,7-tetrahydropyrazolo[3,4-c]pyridin-6-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C1=NN=C(O1)CC(=O)N1CC2=C(CC1)C=NN2 DHKVCYCWBUNNQH-UHFFFAOYSA-N 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000006303 photolysis reaction Methods 0.000 description 1
- 230000015843 photosynthesis, light reaction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000004984 smart glass Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
Images
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
- G02F1/137—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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/20—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the epoxy compounds used
- C08G59/22—Di-epoxy compounds
- C08G59/24—Di-epoxy compounds carbocyclic
-
- 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
- G02F1/13731—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 field-induced phase transition
- G02F1/13737—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 field-induced phase transition in liquid crystals doped with a pleochroic dye
-
- 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
- G02F1/13775—Polymer-stabilized liquid crystal layers
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
Abstract
The invention discloses an optical film with regional multistage control of light transmittance on a full-coverage electrode and a preparation method thereof, wherein the optical film comprises a substrate layer, a conducting layer, a parallel orientation layer, a liquid crystal/epoxy group liquid crystal polymer composite layer, a parallel orientation layer, a conducting layer and a substrate layer which are sequentially stacked; the liquid crystal/epoxy liquid crystal polymer composite material layer is composed of an epoxy liquid crystal polymer network, ions and negative liquid crystal, and is divided into a light-transmitting area and scattering areas with different dynamic scattering degrees: when not electrified, each area is in a light-transmitting state; when the LED lamp is electrified, the light-transmitting area keeps a light-transmitting state, and other areas are in scattering states of different degrees. The optical film is prepared by uniformly mixing a liquid crystalline epoxy monomer, negative liquid crystal and a cationic photoinitiator, and initiating ring-opening polymerization by light through a mask. The optical film can simultaneously achieve regional regulation and control and multilevel regulation and control of light transmittance, can be used as an intelligent window to be widely applied to the fields of building glass, automobile glass and the like, and can also be used as a display device.
Description
Technical Field
The invention belongs to the field of liquid crystal technology application, and relates to an optical film, in particular to an optical film with regional multistage control of light transmittance on a full-coverage electrode and a preparation method thereof.
Background
Liquid crystals are widely used in the fields of displays, smart windows, handwriting pads, and the like, due to their unique electro-optic response characteristics derived from their own dielectric anisotropy, optical anisotropy, and their liquid-like fluidity. In order to achieve the response of the liquid crystal to the electric field, the liquid crystal is usually placed between two transparent conductive substrates, and when a voltage is applied to the conductive substrates to form a potential difference (voltage) between the two conductive substrates, different liquid crystals spontaneously align the liquid crystal molecules in a specific direction due to the difference in the respective dielectric anisotropies. In this process, due to its optical anisotropy, the propagation properties of the liquid crystal layer to the incident light are changed, thereby modulating the light. If different areas of the same liquid crystal panel are required to generate different effects on light, generally, some methods are required to process and divide the conductive layer, dynamic scattering of liquid crystal in each partition is realized by controlling a separate circuit of each partition, and related circuit design and preparation are required. The specific method comprises etching the conductive layer, electromagnetically sputtering the surface of the substrate under a mask, coating the conductive layer and the like. Although the methods realize the independent control of different areas of the same liquid crystal panel, the methods have complex process and higher cost, can only realize the area division control, and do not have the technology to realize the multi-level control of the same liquid crystal panel at present.
Disclosure of Invention
The invention aims to provide an optical thin film with regional and multistage control of light transmittance on a full-coverage electrode, so as to solve the problem that the regional control of the liquid crystal optical thin film needs complicated and high-cost circuit design and processing at present, and achieve the effect of multistage control;
the invention also aims to provide a preparation method of the optical thin film with the light transmittance on the full-coverage electrode capable of being controlled in a multi-stage mode in different areas.
In order to achieve the purpose, the invention adopts the technical scheme that:
an optical film with regional multistage control of light transmittance on a full-coverage electrode comprises a first composite layer structure consisting of a first substrate layer, a first conducting layer and a first parallel orientation layer which are sequentially laminated along the thickness direction, a second composite layer structure consisting of a second parallel orientation layer, a second conducting layer and a second substrate layer which are sequentially laminated along the thickness direction, and a liquid crystal/epoxy group liquid crystal polymer composite layer, wherein the liquid crystal/epoxy group liquid crystal polymer composite layer is arranged between the first parallel orientation layer and the second parallel orientation layer and is integrally laminated with the first composite layer structure and the second composite layer structure, and the liquid crystal/epoxy group liquid crystal polymer composite layer consists of an epoxy group liquid crystal polymer network, ions and negative liquid crystals;
the liquid crystal/epoxy group liquid crystal polymer composite material layer can be divided into a light-transmitting area and a scattering area with different dynamic scattering degrees: when not electrified, each area is in a light-transmitting state; when the LED lamp is powered on, the light-transmitting area keeps a light-transmitting state, other areas show scattering states of different degrees, and the shape, size, position and number of each area can be designed and customized according to requirements.
As a limitation, the epoxy-based liquid crystal polymer network and the negative liquid crystal constituting the liquid crystal/epoxy-based liquid crystal polymer composite layer are both in parallel orientation; the content of epoxy group liquid crystal polymer network and the content of ions form concentration gradient between different areas in the layer, and the gradient directions of the epoxy group liquid crystal polymer network and the ions are kept consistent.
As a further limitation, the substrate layer is made of a transparent substrate made of glass, polyester resin or polycarbonate; the conducting layer is made of ITO or conducting high polymer materials; the parallel alignment layer is made of PVA or PI.
As a further limitation, the thickness of the liquid crystal/epoxy group liquid crystal polymer composite material layer is 0.5-100 μm.
As a second limitation, the raw materials of the liquid crystal/epoxy-based liquid crystal polymer composite material comprise, by weight, 0.01-40: 40-99.9: 0.01-10 parts of liquid crystalline epoxy monomer, negative liquid crystal and cationic photoinitiator.
By way of further limitation, the liquid crystalline epoxy monomer is at least one of the following compounds I and II:
wherein A is 1 、A 2 、G 1 And G 2 Are one of C1-C16 alkyl, C1-C16 alkoxy and C1-C16 siloxane;
J 1 、J 2 、L 1 、L 2 、M 1 and M 2 Are both aromatic or aliphatic;
x 1 、x 2 、y 1 、y 2 、z 1 and z 2 All are integers from 0 to 4;
Q 1 、Q 2 、R 1 、R 2 、T 1 and T 2 Are each halogen, cyano, methyl or methoxy;
k 1 、k 2 、m 1 、m 2 、n 1 and n 2 All are integers of 0-4;
D 1 、D 2 、E 1 and E 2 All are ester group, alkynyl, methylene, nitrogen-nitrogen double bond, ether bond or directly connected;
the negative liquid crystal is at least one of the following compounds:
wherein, A 3 And G 3 All of C1-C16 alkyl, C1-C16 alkoxy and C1-C16 siloxaneOne kind of (1);
J 3 、L 3 and M 3 Are both aromatic or aliphatic;
x 3 、y 3 and z 3 All are integers of 0-4;
Q 3 、R 3 and T 3 Are each halogen, cyano, methyl or methoxy;
k 3 、m 3 、n 3 all are integers of 0-4;
D 3 and E 3 All are ester groups, alkynyl, methylene, nitrogen-nitrogen double bonds, ether bonds or are directly connected;
the cationic photoinitiator is diazonium salt or iodine
Salts or sulfur
And (3) salt.
As a further limitation, the liquid crystal/epoxy liquid crystal polymer composite layer further comprises a dye or a pigment, and the weight part is 0.01-10%.
The invention also provides a preparation method of the optical film with the light transmittance on the full-coverage electrode capable of being controlled in a regional and multistage manner, when the dynamic scattering order of the film is n-level, the method comprises the following steps of:
s1, uniformly mixing raw materials of a liquid crystal/epoxy group liquid crystal polymer composite material, and adding the mixture between a first parallel orientation layer and a second parallel orientation layer;
s2, continuously polymerizing the film for n-1 times, placing a mask between the substrate layer and the light source during each polymerization, performing ring-opening polymerization for 0.01-10 h by using epoxy light to complete the polymerization, and obtaining the optical film with the light transmittance being controlled in different areas and in multiple stages on the full-coverage electrode after the polymerization for n-1 times is completed.
As a limitation, the mask is divided into an opaque region and a transparent region, and the shape, size, position and number of the two regions can be designed and customized according to requirements;
starting from the second polymerization, the light-transmitting areas of the masks used in the preparation process cover the light-transmitting areas of the masks in the previous step; alternatively, the light-transmitting regions of the masks used in the fabrication process do not coincide.
The temperature of the epoxy photoinitiated ring-opening polymerization is further limited to-20-120 ℃.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the technical progress that:
firstly, the optical film with the light transmittance on the full-coverage electrode capable of being controlled in different areas and in multiple stages is characterized in that a mask method is utilized to carry out regional epoxy group monomer polymerization (the shape, the size, the position and the number of light transmission areas of the mask can be designed and customized according to requirements), so that an epoxy group liquid crystal polymer network in a liquid crystal/epoxy group liquid crystal polymer composite material layer is only formed in an illuminated area, and a non-illuminated area has no epoxy group liquid crystal polymer network, namely, the concentration gradient of the polymer network is formed; meanwhile, ions in the liquid crystal/epoxy group liquid crystal polymer composite material layer are only distributed in an area exposed to light by utilizing the adsorption effect of a polymer network formed by polymerization on the ions (a cationic photoinitiator and a photolysis product thereof), so that an ion concentration gradient is formed; in the off state, all areas of the film present a consistent transparent state; when the film is electrified, the region containing the polymer network and ions generates strong dynamic scattering, and the light transmittance is obviously reduced; the region without the polymer network and the ions (namely, the unpolymerized region) does not generate dynamic scattering, and the transparent state consistent with the off state is kept, so that the regional regulation and control of the light transmittance of the optical film on the full-coverage electrode can be realized;
the optical film with the light transmittance on the fully covered electrode capable of being controlled in regions and multiple stages can be used for carrying out epoxy monomer polymerization by using a plurality of masks according to needs, and by using the plurality of masks, continuous multi-stage polymerization enables concentration gradients and ion concentration gradients of a multi-stage polymer network to be formed among different regions in a liquid crystal/epoxy liquid crystal polymer composite material layer, and in an off state, all regions of the film are in a consistent transparent state; when the film is electrified, the dynamic scattering of the high-molecular network density and ion concentration area is strong, and the light transmittance is low; the dynamic scattering of the area with low polymer network density and ion concentration is weaker, and the light transmittance is higher; the region without the polymer network and the ions (namely the region which is not polymerized all the time) does not generate dynamic scattering, and the transparent state which is consistent with the off state is kept, so that the light transmittance of the optical film on the full-coverage electrode can be regulated and controlled in multiple stages;
the optical film with the light transmittance on the full-coverage electrode capable of being controlled in regions and multiple stages can be prepared by adding dye or pigment into a liquid crystal/epoxy group liquid crystal polymer composite material layer, the optical film with a specific color can be prepared at the moment, each region of the optical film in an off state is in a light-transmitting state with a specific color, when the optical film is electrified, one region keeps the light-transmitting state with the specific color, and other regions are in scattering states with different degrees of the specific color;
the preparation method of the optical film with the light transmissivity capable of being controlled in the areas and the multiple stages on the full-coverage electrode greatly simplifies the preparation process of the liquid crystal device and reduces the manufacturing cost of the liquid crystal device because the preparation process does not involve the area-by-area etching or electromagnetic sputtering and coating of the conducting layer and the related circuit design preparation.
The preparation method is suitable for preparing the optical film with the light transmissivity capable of being controlled in different areas and in multiple stages on the full-coverage electrode, the preparation method is simple, the prepared optical film can achieve regional regulation and control and multilevel regulation and control on the light transmissivity at the same time, and the optical film can be used as an intelligent window to be widely applied to the fields of building glass, automobile glass and the like and can also be used as a display device.
Drawings
FIG. 1 is a schematic view of a mask used in example 1;
FIG. 2 is a pictorial view of an optical film prepared in example 1;
FIG. 3 is a schematic view of a mask used in example 2;
FIG. 4 is a pictorial view of an optical film prepared in example 2;
FIG. 5 is a schematic view of a first mask used in example 3;
FIG. 6 is a schematic view of a second mask used in example 3;
FIG. 7 is a pictorial view of an optical film prepared in example 3;
FIG. 8 is a schematic view of a first mask used in example 4;
FIG. 9 is a schematic view of a second mask used in example 4;
FIG. 10 is a pictorial view of the optical film prepared in example 4.
Detailed Description
The present invention will be described in further detail with reference to specific examples. It should be understood that the described embodiments are only for illustrating the invention and do not limit the invention.
Embodiment 1 an optical film with full-coverage electrode and light transmittance capable of being controlled in dual-area and dual-stage mode, a preparation method and performance detection
Preparing a sample:
s1, selecting a transparent substrate made of a glass material, and preparing a liquid crystal box formed by sequentially laminating a substrate layer, a conductive layer and a parallel orientation layer, wherein the distance between the liquid crystal boxes is 20 micrometers; the conducting layer is made of an ITO material, and the parallel orientation layer is made of a PVA material;
s2, uniformly mixing 4g of liquid crystal epoxy monomer E6M, 95.8g of negative liquid crystal HNG726200-100 and 0.2g of cationic photoinitiator UV 6976, filling the mixture into a liquid crystal box, after the mixture is aligned in parallel, placing a mask (wherein a black area can not allow 365nm ultraviolet light to pass through and a white area can allow 365nm ultraviolet light to pass through) shown in figure 1 between the liquid crystal box and an ultraviolet light source, and then using 50mW/cm at 25 DEG C 2 Irradiating the film for 120min by 365nm ultraviolet light to enable E6M to generate ring-opening homopolymerization, thus obtaining the optical film with the full-coverage electrode and the light transmittance capable of being controlled in a double-area double-stage mode, and the optical film is marked as T1;
wherein the molecular structure of the liquid crystal epoxy monomer E6M is as follows:
the molecular structure of the cationic photoinitiator UV 6976 is:
(II) performance detection:
as shown in fig. 2, when no electric field is applied, all parts of the prepared optical film are in a transparent state; when a square wave electric field of 80V and 100Hz is applied, the region which is not subjected to ultraviolet illumination in the middle does not contain polymer networks and ions, so that dynamic scattering does not occur, the light-transmitting state is maintained and is consistent with the light-transmitting state when no electric field is applied, and the regions which are subjected to ultraviolet illumination in the periphery contain polymer networks and ions, so that dynamic scattering occurs in the electric field, a scattering state is presented, and the light transmittance is obviously reduced.
Embodiment 2 an optical film with four-region double-stage control of light transmittance on a full-coverage electrode, a preparation method and performance detection
The preparation method comprises the following steps:
s1, selecting a transparent substrate made of a glass material, and preparing a liquid crystal box formed by sequentially laminating a substrate layer, a conductive layer and a parallel orientation layer, wherein the distance between the liquid crystal boxes is 20 micrometers; the conducting layer is made of an ITO material, and the parallel orientation layer is made of a PVA material;
s2, uniformly mixing 4g of liquid crystal epoxy monomer E6M, 95.8g of negative liquid crystal HNG726200-100 and 0.2g of cationic initiator UV 6976, filling the mixture into a liquid crystal box, after the mixture is aligned in parallel, placing a mask (wherein a black area can not allow 365nm ultraviolet light to pass through and a white area can allow 365nm ultraviolet light to pass through) shown in figure 3 between the liquid crystal box and an ultraviolet light source, and then using 50mW/cm at 25 DEG C 2 And (3) irradiating for 120min by using 365nm ultraviolet light to enable E6M to carry out ring-opening homopolymerization, thus obtaining the optical film with the full-coverage electrode and the light transmittance capable of being controlled in four-region double-stage mode, and the optical film is marked as T2.
(II) performance detection:
as shown in fig. 4, when no electric field is applied, each part of the prepared optical film exhibits a transparent state; when a square wave electric field of 80V and 100Hz is applied, the middle three small rectangular areas irradiated by ultraviolet light contain polymer networks and ions, so dynamic scattering occurs under the electric field to present a scattering state, the light transmittance is obviously reduced, and the rest areas not irradiated by ultraviolet light do not contain the polymer networks and the ions, so the dynamic scattering does not occur, and the light transmittance state is kept consistent with that when the electric field is not applied.
Embodiment 3 an optical film with light transmittance on a full-coverage electrode capable of being controlled in three regions and three levels, a preparation method and performance detection
The preparation method comprises the following steps:
s1, selecting a transparent substrate made of a glass material, and preparing a liquid crystal box formed by sequentially laminating a substrate layer, a conductive layer and a parallel orientation layer, wherein the distance between the liquid crystal boxes is 20 micrometers; the conducting layer is made of an ITO material, and the parallel orientation layer is made of a PVA material;
s2, uniformly mixing 4g of liquid crystal epoxy monomer E6M, 95.8g of negative liquid crystal HNG726200-100 and 0.2g of cationic initiator UV 6976, filling the mixture into a liquid crystal box, placing a first mask (wherein a black area can not allow 365nm ultraviolet light to pass through and a white area can allow 365nm ultraviolet light to pass through) shown in figure 5 between the liquid crystal box and an ultraviolet light source after parallel orientation is formed, and then using 50mW/cm at 25 DEG C 2 Irradiating for 120min by 365nm ultraviolet light to ensure that E6M generates ring-opening homopolymerization;
s3. the first mask was changed to a second mask as shown in FIG. 6 (where black areas were not permeable to 365nm UV light and white areas were permeable to 365nm UV light) followed by 50mW/cm at 25 deg.C 2 And (3) irradiating for 120min by using 365nm ultraviolet light to enable E6M to carry out ring-opening homopolymerization, thus obtaining the optical film which is based on the full-coverage electrode and can control the light transmittance in three regions and three levels, and is marked as T3.
(II) performance detection:
as shown in fig. 7, when no electric field is applied, each part of the prepared optical film exhibits a transparent state; when a square wave electric field of 80V and 100Hz is applied, the polymer network density and ion concentration of the right small rectangular area are highest due to longer polymerization time, and dynamic scattering is strongest, so that the light transmittance is lowest; the left small rectangular area has low polymer network density and ion concentration due to short polymerization time, weak dynamic scattering and low light transmittance; and the rest of the areas which are not subjected to ultraviolet polymerization do not contain polymer networks and ions, so that dynamic scattering does not occur, and the same light transmission state as that in the absence of an applied electric field is maintained.
Embodiment 4 an optical film with three-zone three-level control of light transmittance on a full-coverage electrode, a preparation method and performance detection
The preparation method comprises the following steps:
s1, selecting a transparent substrate made of glass, and preparing a liquid crystal box formed by sequentially laminating a substrate layer, a conducting layer and a parallel orientation layer, wherein the distance between the liquid crystal boxes is 20 micrometers; the conductive layer is made of an ITO material, and the parallel orientation layer is made of a PVA material;
s2, uniformly mixing 4g of liquid crystal epoxy monomer E6M, 95.8g of negative liquid crystal HNG726200-100 and 0.2g of cationic initiator UV 6976, filling the mixture into a liquid crystal box, after parallel orientation is formed, placing a first mask (wherein a black area can not allow 365nm ultraviolet light to pass through and a white area can allow 365nm ultraviolet light to pass through) shown in figure 8 between the liquid crystal box and an ultraviolet light source, and then using 50mW/cm at 25 DEG C 2 Irradiating for 120min by 365nm ultraviolet light to ensure that E6M generates ring-opening homopolymerization;
s3. the first mask is exchanged for a second mask as shown in FIG. 9, (where black areas do not allow 365nm UV to pass through and white areas allow 365nm UV to pass through), followed by 50mW/cm at 25 deg.C 2 And (3) irradiating for 120min by using 365nm ultraviolet light to enable E6M to carry out ring-opening homopolymerization, thus obtaining the optical film which is based on the full-coverage electrode and can control the light transmittance in three regions and three levels, and is marked as T4.
(II) performance detection:
as shown in fig. 10, when no electric field is applied, each part of the prepared optical film exhibits a light-transmitting state; when a square wave electric field of 80V and 100Hz is applied, the polymer network density and ion concentration of the right small rectangular area are highest due to longer polymerization time, and dynamic scattering is strongest, so that the light transmittance is lowest; in the left small rectangular area, as the epoxy group monomer is consumed in the first polymerization and the concentration of the polymerizable monomer is reduced, the density and the ion concentration of a polymer network formed in the left small rectangular area during the second polymerization are low, the dynamic scattering is weak, and the light transmittance is low; and the rest of the areas which are not subjected to ultraviolet polymerization do not contain polymer networks and ions, so that dynamic scattering does not occur, and the same light transmission state as that in the absence of an applied electric field is maintained.
Embodiment 5A green full-coverage electrode optical film with light transmittance capable of being controlled in a double-area double-stage mode, a preparation method and performance detection
The preparation method comprises the following steps:
s1, selecting a transparent substrate made of glass, and preparing a liquid crystal box formed by sequentially laminating a substrate layer, a conducting layer and a parallel orientation layer, wherein the distance between the liquid crystal boxes is 20 micrometers; the conducting layer is made of an ITO material, and the parallel orientation layer is made of a PVA material;
s2, uniformly mixing 4g of liquid crystal epoxy monomer E6M, 95.8g of negative liquid crystal HNG726200-100, 0.2g of cationic initiator UV 6976 and 0.5g of dye solvent green 28, filling the mixture into a liquid crystal box, after parallel orientation is formed, placing a mask (wherein a black area can not allow 365nm ultraviolet light to pass through and a white area can allow 365nm ultraviolet light to pass through) shown in figure 1 between the liquid crystal box and an ultraviolet light source, and then using 50mW/cm at 25 DEG C 2 And (3) irradiating for 120min by using 365nm ultraviolet light to enable E6M to carry out ring-opening homopolymerization, thus obtaining a green double-stage control optical film with light transmittance based on a full-coverage electrode capable of being divided into four regions, which is marked as T5.
(II) performance detection:
when no electric field is applied, all parts of the prepared optical film are in a green light-transmitting state; when a square wave electric field of 80V and 100Hz is applied, the region which is not subjected to ultraviolet illumination in the middle does not contain a high molecular network and ions, so that dynamic scattering does not occur, a green light-transmitting state is maintained and is consistent with the state when no electric field is applied, and the regions which are subjected to ultraviolet illumination in the periphery contain a polymer network and ions, so that dynamic scattering occurs in the electric field, a green scattering state is presented, and the light transmittance is obviously reduced.
Example 6-12 optical film with double-area double-stage controllable light transmittance on full-coverage electrode
In examples 6 to 12, several optical thin films with light transmittance on a full-coverage electrode capable of being controlled in a double-area double-stage mode are prepared, the preparation method of the optical thin films is basically the same as that in example 1, except that the raw materials and part of process parameters are different, and the detailed description is shown in the following table:
TABLE 1 structures and labeling codes of liquid crystalline epoxy monomers in examples 6 to 12
TABLE 2 negative liquid crystal structure and mark code in examples 6 to 12
Table 3 raw materials and part of the process parameters in examples 6 to 12
Through detection, the optical thin films T6-T12 with the light transmittance on the full-coverage electrode capable of being controlled in a double-area double-stage mode have all parts in a light transmission state when an electric field is not applied; when a square wave electric field of 80V and 100Hz is applied, the middle region which is not irradiated by ultraviolet light does not contain polymer networks and ions, so that dynamic scattering does not occur, the transparent state is maintained and is consistent with the transparent state when no electric field is applied, and the peripheral regions which are irradiated by ultraviolet light contain polymer networks and ions, so that dynamic scattering occurs under the electric field, the transparent state is presented, the light transmittance is obviously reduced, wherein the transparent state and the transparent state present corresponding colors due to the addition of pigments or dyes to T7, T10, T11 and T12.
According to the knowledge of those skilled in the art, when the optical film is made of a flexible substrate such as polyester resin or polycarbonate, a roll-to-roll processing process can be used as required to prepare the optical film.
Claims (10)
1. An optical film with regional multistage control of light transmittance on a full-coverage electrode comprises a first composite layer structure consisting of a first substrate layer, a first conducting layer and a first parallel orientation layer which are sequentially laminated along the thickness direction, a second composite layer structure consisting of a second parallel orientation layer, a second conducting layer and a second substrate layer which are sequentially laminated along the thickness direction, and a liquid crystal/epoxy group liquid crystal polymer composite material layer, wherein the liquid crystal/epoxy group liquid crystal polymer composite material layer is arranged between the first parallel orientation layer and the second parallel orientation layer and is integrally laminated with the first composite layer structure and the second composite layer structure, and the liquid crystal/epoxy group liquid crystal polymer composite material layer consists of an epoxy group liquid crystal polymer network, ions and negative liquid crystals;
the liquid crystal/epoxy liquid crystal polymer composite material layer can be divided into a light-transmitting area and scattering areas with different dynamic scattering degrees, and the shape, size, position and number of each area can be designed and customized according to requirements.
2. The optical film according to claim 1, wherein the epoxy-based liquid crystal polymer network and the negative liquid crystal constituting the liquid crystal/epoxy-based liquid crystal polymer composite layer are oriented in parallel; the content of epoxy group liquid crystal polymer network and the content of ions form concentration gradient between different areas in the layer, and the gradient directions of the epoxy group liquid crystal polymer network and the ions are kept consistent.
3. The optical film according to claim 2, wherein the substrate layer is made of a transparent substrate made of glass, polyester resin or polycarbonate;
the conducting layer is made of ITO or conducting high polymer materials;
the parallel alignment layer is made of PVA or PI.
4. The optical film according to claim 3, wherein the thickness of the liquid crystal/epoxy-based liquid crystal polymer composite layer is 0.5-100 μm.
5. The optical film according to any one of claims 1 to 4, wherein the raw materials of the liquid crystal/epoxy-based liquid crystal polymer composite material comprise, by weight, 0.01 to 40: 40-99.9: 0.01-10 parts of liquid crystalline epoxy monomer, negative liquid crystal and cationic photoinitiator.
6. The optical film according to claim 5, wherein the optical film is capable of multi-stage control of light transmittance in different regions on the full coverage electrode,
the liquid crystalline epoxy monomer is at least one of the following compounds I and II:
wherein A is 1 、A 2 、G 1 And G 2 Are one of C1-C16 alkyl, C1-C16 alkoxy and C1-C16 siloxane;
J 1 、J 2 、L 1 、L 2 、M 1 and M 2 Are both aromatic or aliphatic;
x 1 、x 2 、y 1 、y 2 、z 1 and z 2 All are integers of 0-4;
Q 1 、Q 2 、R 1 、R 2 、T 1 and T 2 Are each halogen, cyano, methyl or methoxy;
k 1 、k 2 、m 1 、m 2 、n 1 and n 2 All are integers from 0 to 4;
D 1 、D 2 、E 1 and E 2 All are ester group, alkynyl, methylene, nitrogen-nitrogen double bond, ether bond or directly connected;
the negative liquid crystal is at least one of the following compounds:
wherein A is 3 And G 3 Are one of C1-C16 alkyl, C1-C16 alkoxy and C1-C16 siloxane;
J 3 、L 3 and M 3 Are both aromatic or aliphatic;
x 3 、y 3 and z 3 All are integers of 0-4;
Q 3 、R 3 and T 3 Are each halogen, cyano, methyl or methoxy;
k 3 、m 3 、n 3 all are integers of 0-4;
D 3 and E 3 All are ester group, alkynyl, methylene, nitrogen-nitrogen double bond, ether bond or directly connected;
the cationic photoinitiator is diazonium salt or iodine
Salts or sulfur
And (3) salt.
7. The optical film according to claim 6, wherein the liquid crystal/epoxy-based liquid crystal polymer composite layer further comprises a dye or a pigment in an amount of 0.01-10 wt%.
8. The method for preparing the optical thin film with the light transmittance being controlled in the divided regions and in the multi-stage manner on the full-coverage electrode according to any one of claims 1 to 7, wherein when the dynamic scattering order of the thin film is n, the method comprises the following steps which are sequentially carried out:
s1, uniformly mixing raw materials of a liquid crystal/epoxy group liquid crystal polymer composite material, and adding the mixture between a first parallel orientation layer and a second parallel orientation layer;
s2, continuously polymerizing the film for n-1 times, placing a mask between the substrate layer and the light source during each polymerization, performing ring-opening polymerization for 0.01-10 h by using epoxy light to complete the polymerization, and obtaining the optical film with the light transmittance being controlled in different areas and in multiple stages on the full-coverage electrode after the polymerization for n-1 times is completed.
9. The method for preparing an optical thin film with regional and multistage control of light transmittance on a full-coverage electrode according to claim 8, wherein the mask is divided into an opaque region and a transparent region, and the shapes, sizes, positions and numbers of the opaque region and the transparent region can be designed and customized according to requirements;
starting from the second polymerization, the light-transmitting areas of the masks used in the preparation process cover the light-transmitting areas of the masks in the previous step; or the light-transmitting areas of the masks used in the preparation process do not coincide.
10. The method for preparing the optical thin film with the light transmittance being controlled in the regions and the multiple stages on the full-coverage electrode according to claim 9, wherein the temperature of the epoxy light-initiated ring-opening polymerization is-20 to 120 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210697482.5A CN115097676B (en) | 2022-06-20 | 2022-06-20 | Optical film with full-coverage electrode and light transmittance capable of being controlled in multiple areas and multiple levels and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210697482.5A CN115097676B (en) | 2022-06-20 | 2022-06-20 | Optical film with full-coverage electrode and light transmittance capable of being controlled in multiple areas and multiple levels and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115097676A true CN115097676A (en) | 2022-09-23 |
| CN115097676B CN115097676B (en) | 2023-12-22 |
Family
ID=83291097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210697482.5A Active CN115097676B (en) | 2022-06-20 | 2022-06-20 | Optical film with full-coverage electrode and light transmittance capable of being controlled in multiple areas and multiple levels and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115097676B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106094338A (en) * | 2016-08-11 | 2016-11-09 | 京东方科技集团股份有限公司 | A kind of double-side display device and electronic equipment |
| CN113272726A (en) * | 2019-10-24 | 2021-08-17 | 京东方科技集团股份有限公司 | Display panel, display device and display panel manufacturing method |
| CN113917729A (en) * | 2021-10-21 | 2022-01-11 | 北京大学 | Trans-form dimming glass based on electric response and preparation method thereof |
| CN114002867A (en) * | 2021-10-08 | 2022-02-01 | 北京大学 | Trans-mode light adjusting film based on liquid crystal epoxy photoinitiated ring-opening polymerization and preparation method thereof |
-
2022
- 2022-06-20 CN CN202210697482.5A patent/CN115097676B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106094338A (en) * | 2016-08-11 | 2016-11-09 | 京东方科技集团股份有限公司 | A kind of double-side display device and electronic equipment |
| CN113272726A (en) * | 2019-10-24 | 2021-08-17 | 京东方科技集团股份有限公司 | Display panel, display device and display panel manufacturing method |
| CN114002867A (en) * | 2021-10-08 | 2022-02-01 | 北京大学 | Trans-mode light adjusting film based on liquid crystal epoxy photoinitiated ring-opening polymerization and preparation method thereof |
| CN113917729A (en) * | 2021-10-21 | 2022-01-11 | 北京大学 | Trans-form dimming glass based on electric response and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115097676B (en) | 2023-12-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102621616A (en) | Method for manufacturing optical anisotropic layer | |
| CN108646494A (en) | A kind of electrochromic device and preparation method thereof and electronic product | |
| CN115097676A (en) | Optical film with regional multistage control of light transmittance on full-coverage electrode and preparation method thereof | |
| JP2001048904A (en) | Production method for liquid crystal orientation membrane and liquid crystal display | |
| JPH075440A (en) | Liquid crystal resin composition for light-controlling liquid crystal element | |
| CN111752048B (en) | Liquid crystal display device having a light shielding layer | |
| CN211236504U (en) | Liquid crystal light modulation device | |
| CN1292298C (en) | Manufacturing method of liquid crystal display screen | |
| CN114063335A (en) | Preparation method of trans-polymer honeycomb-net liquid crystal display and display panel | |
| CN101533176B (en) | A manufacturing method of liquid crystal display panel | |
| KR100321255B1 (en) | Method for fabricating polymer-dispersed liquid crystal display | |
| JP2733992B2 (en) | Liquid crystal device | |
| CN115903313A (en) | Large-aperture cascading mode control variable-focus liquid crystal lens system and method | |
| JP2734000B2 (en) | Liquid crystal device | |
| CN114527591A (en) | Preparation method of liquid crystal display panel and liquid crystal display panel | |
| JP2733996B2 (en) | Liquid crystal device | |
| JP2733995B2 (en) | Liquid crystal device | |
| CN117487227A (en) | Flexible circular polarization light-emitting device and preparation method and application thereof | |
| EP0799879A1 (en) | A composite polymer/liquid crystal material suitable for modulated light transmission, and the process for its manufacture | |
| JP2733987B2 (en) | Liquid crystal device | |
| CN111440401A (en) | Polarized luminescent material and preparation method of polarized luminescent layer | |
| KR20230104629A (en) | Improved transparency of polymer-walled device and manufacturing method thereof | |
| JP2733999B2 (en) | Liquid crystal device | |
| JPH0895011A (en) | Liquid crystal device and liquid crystal display device using it | |
| CN116082991A (en) | Optical film and preparation method and application thereof |
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 |