CN117148640A - Preparation method of trans-type liquid crystal dimming glass based on liquid crystal physical gel - Google Patents
Preparation method of trans-type liquid crystal dimming glass based on liquid crystal physical gel Download PDFInfo
- Publication number
- CN117148640A CN117148640A CN202310958330.0A CN202310958330A CN117148640A CN 117148640 A CN117148640 A CN 117148640A CN 202310958330 A CN202310958330 A CN 202310958330A CN 117148640 A CN117148640 A CN 117148640A
- Authority
- CN
- China
- Prior art keywords
- liquid crystal
- physical gel
- nematic liquid
- trans
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 64
- 239000011521 glass Substances 0.000 title claims abstract description 53
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 239000004988 Nematic liquid crystal Substances 0.000 claims abstract description 62
- 239000007788 liquid Substances 0.000 claims abstract description 23
- 150000001875 compounds Chemical class 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 18
- 238000001816 cooling Methods 0.000 claims abstract description 17
- 239000011229 interlayer Substances 0.000 claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 238000003756 stirring Methods 0.000 claims abstract description 11
- 238000002156 mixing Methods 0.000 claims abstract description 10
- 239000000203 mixture Substances 0.000 claims abstract description 9
- 238000003303 reheating Methods 0.000 claims abstract description 7
- 239000000126 substance Substances 0.000 claims description 12
- 230000009969 flowable effect Effects 0.000 claims description 7
- 239000011259 mixed solution Substances 0.000 claims description 6
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 claims description 3
- DKBCURTUXYMRFB-LXTVHRRPSA-N (2r,3r,4s,5r)-7-(3,4-dimethylphenyl)hept-6-ene-1,2,3,4,5,6-hexol Chemical compound CC1=CC=C(C=C(O)[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO)C=C1C DKBCURTUXYMRFB-LXTVHRRPSA-N 0.000 claims description 2
- HZVFRKSYUGFFEJ-YVECIDJPSA-N (2r,3r,4s,5r)-7-phenylhept-6-ene-1,2,3,4,5,6-hexol Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C(O)=CC1=CC=CC=C1 HZVFRKSYUGFFEJ-YVECIDJPSA-N 0.000 claims description 2
- CTPBWPYKMGMLGS-CIAFKFPVSA-N (3s,4s,5s,6r)-1,8-bis(4-methylphenyl)octa-1,7-diene-2,3,4,5,6,7-hexol Chemical compound C1=CC(C)=CC=C1C=C(O)[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C(O)=CC1=CC=C(C)C=C1 CTPBWPYKMGMLGS-CIAFKFPVSA-N 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 10
- ZVQOOHYFBIDMTQ-UHFFFAOYSA-N [methyl(oxido){1-[6-(trifluoromethyl)pyridin-3-yl]ethyl}-lambda(6)-sulfanylidene]cyanamide Chemical compound N#CN=S(C)(=O)C(C)C1=CC=C(C(F)(F)F)N=C1 ZVQOOHYFBIDMTQ-UHFFFAOYSA-N 0.000 claims 5
- 238000000149 argon plasma sintering Methods 0.000 abstract description 4
- 239000004986 Cholesteric liquid crystals (ChLC) Substances 0.000 abstract description 3
- 239000011159 matrix material Substances 0.000 abstract description 2
- 238000002834 transmittance Methods 0.000 description 17
- 230000005684 electric field Effects 0.000 description 11
- YWEWWNPYDDHZDI-JJKKTNRVSA-N (1r)-1-[(4r,4ar,8as)-2,6-bis(3,4-dimethylphenyl)-4,4a,8,8a-tetrahydro-[1,3]dioxino[5,4-d][1,3]dioxin-4-yl]ethane-1,2-diol Chemical compound C1=C(C)C(C)=CC=C1C1O[C@H]2[C@@H]([C@H](O)CO)OC(C=3C=C(C)C(C)=CC=3)O[C@H]2CO1 YWEWWNPYDDHZDI-JJKKTNRVSA-N 0.000 description 10
- 238000010586 diagram Methods 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- 230000004044 response Effects 0.000 description 6
- 239000004983 Polymer Dispersed Liquid Crystal Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 210000002858 crystal cell Anatomy 0.000 description 4
- 238000003760 magnetic stirring Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000004873 anchoring Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000001338 self-assembly Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C27/00—Joining pieces of glass to pieces of other inorganic material; Joining glass to glass other than by fusing
- C03C27/06—Joining glass to glass by processes other than fusing
- C03C27/10—Joining glass to glass by processes other than fusing with the aid of adhesive specially adapted for that purpose
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Nonlinear Science (AREA)
- Geochemistry & Mineralogy (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Crystallography & Structural Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Ceramic Engineering (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
Abstract
A preparation method of trans-type liquid crystal dimming glass based on liquid crystal physical gel comprises mixing nematic liquid crystal with physical gel, and clearing point T of the nematic liquid crystal IN Heating and magnetically stirring to obtain nematic liquid crystal physical gel; reheating nematic liquid crystal physical gel to Cooling Point T IN And adding the chiral compound when the solution is slowly cooled to a white flowing liquid, magnetically stirring the mixture, filling the white liquid with fluidity into a glass interlayer, and cooling the white liquid to room temperature to obtain the trans-type liquid crystal dimming glass. The materials used in the present invention need to have both an optically transparent state and an optically scattering state. Cholesteric liquid crystal (Ch phase liquid crystal, hereinafter abbreviated as Ch) is selected as a base material, and Ch is realized by taking nematic liquid crystal as a matrix liquid crystal and doping a chiral compound in a certain proportion therein. The planar texture of Ch is used as the light transparent state, and the focal conic texture is used as the light scattering state, namely the opaque state.
Description
Technical Field
The invention relates to a liquid crystal display device, in particular to a preparation method of a trans-type liquid crystal dimming glass based on liquid crystal physical gel.
Background
A Liquid Crystal (LC) material is a special substance whose molecular orientation can be changed by an applied electric field due to its molecular polarity, in other words, the optical properties of the liquid crystal can be controlled by the electric field. A typical example is the use of electrically controlled liquid crystal dimming glass. The electric control liquid crystal dimming glass has been widely used in the fields of automobile doors and windows, indoor partitions and the like due to the advantage that the transmittance can be regulated and controlled according to the requirements.
The main mechanism of currently commercialized electrically controlled dimming glass is formally electrically controlled dimming based on Polymer Dispersed Liquid Crystal (PDLC). The normal state of such a product is the light scattering state, i.e. the non-transparent state, and the product remains light transparent only when an external electric field is applied and maintained. However, in practical applications, it is necessary to make the window in a light transmitting state for a majority of time, and in a non-transparent state for a minority of time. If the above-mentioned formal electrically controlled dimming glass is still used in these occasions, unnecessary energy consumption is necessarily caused. The electrooptical characteristics of the reflective electric control liquid crystal dimming glass are just opposite to those of the formal electric control dimming, namely, the reflective electric control liquid crystal dimming glass is in an optically transparent state when no electric field is applied, and is in a strong light scattering state when the electric field is applied. Therefore, the trans-type electric control dimming glass can better meet the development requirements of energy conservation and environmental protection in the occasions, so that the trans-type electric control liquid crystal dimming glass has wider application prospect.
Another problem with electrically controlled dimming glasses currently used in life is that they cannot be used under direct current. Since the material of which the device is made is PDLC, the prepolymer content in such material is substantially equal to that of LC, which makes the LC molecules around many more impurities (for LC, the prepolymer is an impurity) so that the product cannot be driven by direct current, which undoubtedly impairs the mobility and portability of the device.
Therefore, development of a novel preparation material and manufacturing process of electrically controlled dimming glass is urgently needed to solve the problem of trans-regulation and direct current driving of devices.
Disclosure of Invention
The invention aims to provide a preparation method of a trans-type liquid crystal dimming glass based on liquid crystal physical gel, which can be regulated and controlled in trans and driven by direct current.
In order to achieve the above purpose, the preparation method of the invention comprises the following steps:
step one: mixing nematic liquid crystal and physical gel with mass of 0.08-0.16% of that of the nematic liquid crystal, and placing the mixed nematic liquid crystal and physical gel in the clear point T of the nematic liquid crystal IN Heating and magnetically stirring the above materials to fully and uniformly mix nematic liquid crystal and physical gel to obtain mixed solution, and cooling to room temperature to obtain non-flowable milky nematic liquid crystal physical gel;
step two: reheating nematic liquid crystal physical gel to Cooling Point T IN The physical gel of the nematic liquid crystal is transparent and has strong fluidity, the temperature is controlled to be gradually reduced until the substance is a milky liquid with fluidity, and the chiral compound with the mass of 1-7% of that of the nematic liquid crystal is added at the constant temperature and then stirred and mixed uniformly by magnetic force to obtain a white liquid with fluidity;
step three: at the temperature at which the chiral compound was added, a white liquid having fluidity was filled into the glass interlayer and cooled to room temperature, to obtain a trans-type liquid crystal light adjusting glass.
The nematic liquid crystal in the first step is SLC-1717, HTG135200-100, SLC-9023, C5 or XH154T7023-000.
The physical gel of the first step is benzylidene sorbitol, di (p-methylbenzylidene) sorbitol or di (3, 4-dimethyl benzylidene) sorbitol.
The chiral compound in the second step is R5011, S811, R1011 or CB15.
The temperature control rate of gradually reducing the control temperature of the second step is 1-4 ℃/min.
The glass interlayer in the third step is made of transparent glass with one surface coated with indium tin oxide.
The materials used in the present invention need to have both an optically transparent state and an optically scattering state. Cholesteric liquid crystal (Ch phase liquid crystal, hereinafter abbreviated as Ch) is selected as a base material, and Ch is realized by taking nematic liquid crystal as a matrix liquid crystal and doping a chiral compound in a certain proportion therein. The planar texture of Ch is used as the light transparent state, and the focal conic texture is used as the light scattering state, namely the opaque state.
The invention takes a liquid crystal physical gel system as a manufacturing material, and Liquid Crystal Physical Gel (LCPG) is obtained by doping small molecular physical gel factors into liquid crystal and self-assembling between the gel factors. The applied electric field provides the force for converting the Ch from the transparent state to the scattering state, but the Ch in the focal conic texture cannot restore to the planar texture by itself because the planar texture has larger energy than the focal conic texture. The self-assembly behavior of the gelator forms a three-dimensional (3D) fiber network and binds the LC molecules therein, so that the anchoring energy between the fiber network and the LC molecules can in turn provide a force to restore Ch back to the optically transparent state. Unlike PDLC, the present invention needs only very small amount of physical gel factor, and its content is less than 0.50% of the liquid crystal quality, so that the existence of gel factor may be ignored almost, and the system is very similar to pure LC (i.e. no impurity exists), so that it may be driven under DC power.
The glass used in the present invention is transparent glass with one side coated with Indium Tin Oxide (ITO) and the other side not coated with any substance. Two such glasses were made into a liquid crystal cell using two polyethylene spacers with a thickness of 56 μm. And filling the materials into a liquid crystal box to prepare the required electrically controlled adjustable light glass.
Drawings
FIG. 1 shows the transmittance of Ch in a planar texture in the visible wavelength band when no physical gel DMDBS is added in example 1 of the present invention, which is 100% with respect to an empty liquid crystal cell.
Fig. 2 is a physical diagram of the LCPG in different states. (a) Is in an anisotropic-gel state, and the substance presents a non-flowable white color; (b) Is in an isotropic sol state, and the substance has fluidity and is colorless and transparent; (c) Is in anisotropic sol state, the material has fluidity and is white.
Fig. 3 shows that the transmittance of the inventive product of the example to visible light under normal (no power on) conditions can reach 80% or more at maximum. The measurement was performed with reference to an empty liquid crystal cell, i.e. the transmittance was 100%.
FIG. 4 is an electro-optic plot of the product of the example, i.e., the transmittance as a function of voltage, at a maximum transmittance of 100% and a light source wavelength of 625nm.
Fig. 5 is a response time test of the example product. The opening time in the response time refers to the time for the product to change from a transparent state to a completely scattering state after being electrified; the off-time refers to the time taken for the fully scattering state to change back to the transparent state after the electric field is removed. The completely scattering state herein means a state where transmittance is minimum. The wavelength of the light source used for the test was 625nm.
Fig. 6 is a physical view of the example product. (a) is a physical image of the product in a normal state; (b) is a physical image of the product becoming transparent after being energized; (c) Is a physical image of the product after the electric field is removed and the product is restored to an optically transparent state.
Fig. 7 is an image of an example under a polarized microscope. (a) Ch is formed by mixing 96% of SLC-1717 and 4% of S811 in percentage by mass respectively; (b) The LCPG image after adding DMDBS into Ch is a gel formed by DMDBS as black filiform substances in the image.
Fig. 8 is a block diagram of an example product. The main structure of the product is an interlayer formed by two pieces of glass with one side coated with ITO conductive and the other side non-conductive, and the LCPG is filled in the interlayer to manufacture the product.
Fig. 9 is a schematic diagram showing a change in the arrangement of liquid crystal molecules when power is applied and when power is not applied. (a) is that Ch is in a planar texture, i.e., transparent, when unpowered; (b) Ch is in focal conic texture, i.e., scattering state, at the point of addition; (c) After the electric field is removed, ch is restored to the planar texture again under the anchoring energy of the physical gel.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples, wherein the raw materials used in the examples below are all commercially available. The room temperature mentioned in the examples below is 25.+ -. 3 ℃.
The nematic liquid crystal adopted by the invention is as follows:
the physical gel is as follows:
chiral compounds that can be used:
before specific preparation, the liquid crystal cell needs to be prepared. Two pieces of conductive glass are taken, one surface of the glass is coated with ITO and conductive, the other surface of the glass is nonconductive, the conductive two surfaces are placed face to face, and an interlayer with the thickness of 56 μm is formed between the two pieces of glass by using two gaskets with the thickness of 56 μm.
Example 1:
the following examples used the compounds shown in Table 1, in which the total mass fraction of SLC-1717 and S811 was recorded as 100%, i.e., the Ch mass fraction formed by both was 100%.
Table 1:
the designations SLC-1717, DMDBS, S811 used in the examples are all disclosed compounds and can be obtained by those skilled in the art from published literature or by purchase.
The specific preparation steps of this example are as follows:
step one: the product of the invention needs to have both an optically transparent state and an optically scattering state. In the transparent state, the higher the transmittance in the visible light range is, the better the transmittance is. The transparent state in the examples is achieved by planar texture of SLC-1717 and S811 mixed to form cholesteric liquid crystals, while different mass fractions of S811 produce different transmission bands and transmittance. In this embodiment, when the mass fraction ratio of SLC-1717 to S811 is 96:4, the transmission effect on visible light is optimal, and the maximum transmittance may reach 80% or more. The transmittance in the visible light range is shown in fig. 1.
And step two, preparing the materials according to the proportion shown in the table 1. Placing SLC-1717 and DMDBS into glass bottle, then placing proper-sized magnet, heating and stirring on magnetic stirrer for about 15min at the temperature of clear point T of liquid crystal IN The heating and stirring temperature of this example was maintained at 120℃to ensure that the liquid crystal and physical gel factor were sufficiently and homogeneously mixed.
And thirdly, cooling the solution to room temperature after the SLC-1717 and the DMDBS are stirred. If the contents of the vial were milky at room temperature and after inversion of the vial, the contents did not flow, also known as anisotropic-gel, the physical diagram is shown in fig. 2 (a), indicating that SCL-1717 and DMDBS had formed LCPG.
Step four, the LCPG is reheated to 120 ℃, and the bottle material again presents a colorless transparent solution (also called isotropy-sol state) physical diagram with fluidity as shown in fig. 2 (b). At this time, the cooling rate was controlled to be 2 ℃/min, so that the material in the bottle was ensured to exhibit a white liquid having fluidity (also referred to as an anisotropic-sol state) and the solution in the bottle was maintained in this state. Too high a temperature will cause the solution to change back to a transparent state, and too low a temperature will cause the sol to lose fluidity and become a gel. Therefore, this step requires to control the temperature within a certain range. In this example, the temperature was controlled and maintained at 76 ℃ + -1.5 ℃.
Step five, adding S811 which is weighed in advance into the anisotropic sol state solution, namely in the state shown in the figure 2 (c), and stirring for about 15min at the temperature to uniformly mix the S811 with SLC-1717 in the solution. After adding S811, T of liquid crystal IN There is a decrease in the number of steps, and if the liquid crystal is found to be changed back to the colorless transparent state, it is necessary to re-fabricate the liquid crystal again from the second step. Temperature in this exampleThe temperature is kept at 76+/-1.5 ℃, and the material in the bottle can always show white liquid with stronger fluidity, so that the preparation can be well finished.
And step six, filling the solution into a glass interlayer prepared in advance at the temperature, cooling to room temperature, and finishing the preparation of the trans-type electronically controlled dimming glass, wherein the preparation of the trans-type electronically controlled dimming glass is shown in fig. 8. The material in the interlayer is also referred to as LCPG.
The use performance of the embodiment is tested, the transmittance of the embodiment product to visible light can reach more than 80%, and the test result is shown in figure 3; the transmittance versus voltage curve and response time curve were measured using a liquid crystal integrated parameter apparatus, and the results are shown in fig. 4 and 5, wherein the example product exhibits a contrast ratio of greater than 30, a response time of about 30ms and a driving voltage of not more than 30V at maximum. The response time is less than the human eye response time (about 40 ms), and the maximum driving voltage is below the human body safety voltage (36V).
Referring to fig. 6 (a), a physical diagram of the present embodiment in a normal state is shown; (b) Is a physical diagram which changes into a transparent state after being electrified in the embodiment; (c) Is a physical image of the present embodiment after the electric field is removed and the light transparent state is restored.
FIG. 7 (a) shows Ch obtained by mixing 96% SLC-1717 and 4% S811, respectively, in mass fraction in this embodiment; (b) The LCPG image after adding DMDBS into Ch is a gel formed by DMDBS as black filiform substances in the image.
FIG. 9 (a) shows the Ch in a planar texture, i.e., transparent, when the present embodiment is unpowered; (b) Is that Ch is in focal conic texture, i.e. scattering state, when the point is added in the embodiment; (c) It is the embodiment that after the electric field is removed, ch is restored to the planar texture again under the anchoring energy of the physical gel.
Table 2 shows the results of performance testing of the products of the examples of the invention:
table 2:
in the trans-type electric control dimming glass, the maximum driving voltage is also called as the minimum transmittance voltage, namely the voltage corresponding to the state that a product becomes opaque after being electrified and the transmittance is minimum; the threshold voltage is the voltage corresponding to a 10% decrease in transmittance.
Example 2:
step one: mixing nematic liquid crystal HTG135200-100 and physical gel DMDBS with nematic liquid crystal quality of 0.08%, and mixing the mixed nematic liquid crystal and physical gel at clear point T of nematic liquid crystal IN The above heating magnetic stirring, make nematic liquid crystal and physical gel fully and evenly mix to get mixed solution, the heating stirring temperature of this example is kept at 120 ℃, after it is cooled to room temperature, get the non-flowable milky nematic liquid crystal physical gel;
step two: reheating nematic liquid crystal physical gel to Cooling Point T IN The temperature is kept at 120 ℃ to ensure that the nematic liquid crystal physical gel is transparent and has strong fluidity, the cooling rate is controlled to be 2 ℃/min to be reduced until the substance is a milky liquid with fluidity, in the embodiment, the temperature is controlled and kept at 76+/-1.5 ℃, and the chiral compound R5011 with the mass of 2% of the nematic liquid crystal is added unchanged, and then the mixture is magnetically stirred and mixed uniformly to obtain the white liquid with fluidity;
step three: at the temperature at which the chiral compound was added, a white liquid having fluidity was filled into the glass interlayer and cooled to room temperature, to obtain a trans-type liquid crystal light adjusting glass.
Example 3:
step one: mixing physical gel DBS with nematic liquid crystal SLC-9023 of which the mass is 0.1%, and placing the mixed nematic liquid crystal and physical gel in a clear point T of the nematic liquid crystal IN The above heating magnetic stirring, make nematic liquid crystal and physical gel fully and evenly mix to get mixed solution, the heating stirring temperature of this example is kept at 135 ℃, after it is cooled to room temperature, get the non-flowable milky nematic liquid crystal physical gel;
step two: reheating nematic liquid crystal physical gel to Cooling Point T IN The temperature is kept at 135 ℃ to ensure that the nematic liquid crystal physical gel is transparent and has strong fluidityThe temperature reduction rate is controlled to be 3 ℃/min until the substance presents a milky white liquid with fluidity, in the embodiment, the temperature is controlled and kept at 76+/-1.5 ℃, and the chiral compound R811 with the mass of 5% of nematic liquid crystal is added at the same temperature and then magnetically stirred and mixed uniformly to obtain the white liquid with fluidity;
step three: at the temperature at which the chiral compound was added, a white liquid having fluidity was filled into the glass interlayer and cooled to room temperature, to obtain a trans-type liquid crystal light adjusting glass.
Example 4:
step one: mixing nematic liquid crystal C5 and physical gel MDBS with mass of 0.14% of that of the nematic liquid crystal, and placing the mixed nematic liquid crystal and physical gel in the clear point T of the nematic liquid crystal IN The above heating magnetic stirring, make nematic liquid crystal and physical gel fully and evenly mix to get mixed solution, the heating stirring temperature of this example is kept at 100deg.C, after it is cooled to room temperature, get the non-flowable milky nematic liquid crystal physical gel;
step two: reheating nematic liquid crystal physical gel to Cooling Point T IN The temperature is kept at 100 ℃ to ensure that the nematic liquid crystal physical gel is transparent and has strong fluidity, the cooling rate is controlled to be 1 ℃/min to be reduced until the substance is a milky liquid with fluidity, in the embodiment, the temperature is controlled and kept at 72+/-1.5 ℃, and the chiral compound R1011 with the mass of 1% of the nematic liquid crystal is added at the same temperature and then magnetically stirred and mixed uniformly to obtain a white liquid with fluidity;
step three: at the temperature at which the chiral compound was added, a white liquid having fluidity was filled into the glass interlayer and cooled to room temperature, to obtain a trans-type liquid crystal light adjusting glass.
Example 5:
step one: mixing nematic liquid crystal XH154T7023-000 and physical gel MDSB with nematic liquid crystal quality of 0.16%, and placing the mixed nematic liquid crystal and physical gel in clear point T of nematic liquid crystal IN The above heating magnetic stirring to make nematic liquid crystal and physical gel fully and uniformly mixedMixing to obtain a mixed solution, and keeping the heating and stirring temperature at 150 ℃ in the embodiment, and cooling to room temperature to obtain the non-flowable milky white nematic liquid crystal physical gel;
step two: reheating nematic liquid crystal physical gel to Cooling Point T IN The temperature is kept at 150 ℃ to ensure that the nematic liquid crystal physical gel is transparent and has strong fluidity, the cooling rate is controlled to be 4 ℃/min to be reduced until the substance is a milky liquid with fluidity, in the embodiment, the temperature is controlled and kept at 80+/-1.5 ℃, and the chiral compound CB15 with 7% of the mass of the nematic liquid crystal is added after the temperature is kept unchanged, and then the mixture is magnetically stirred and mixed uniformly to obtain the white liquid with fluidity;
step three: at the temperature at which the chiral compound was added, a white liquid having fluidity was filled into the glass interlayer and cooled to room temperature, to obtain a trans-type liquid crystal light adjusting glass.
Claims (6)
1. A preparation method of trans-type liquid crystal dimming glass based on liquid crystal physical gel is characterized by comprising the following steps of:
step one: mixing nematic liquid crystal and physical gel with mass of 0.08-0.16% of that of the nematic liquid crystal, and placing the mixed nematic liquid crystal and physical gel in the clear point T of the nematic liquid crystal IN Heating and magnetically stirring the above materials to fully and uniformly mix nematic liquid crystal and physical gel to obtain mixed solution, and cooling to room temperature to obtain non-flowable milky nematic liquid crystal physical gel;
step two: reheating nematic liquid crystal physical gel to Cooling Point T IN The physical gel of the nematic liquid crystal is transparent and has strong fluidity, the temperature is controlled to be gradually reduced until the substance is a milky liquid with fluidity, and the chiral compound with the mass of 1-7% of that of the nematic liquid crystal is added at the constant temperature and then stirred and mixed uniformly by magnetic force to obtain a white liquid with fluidity;
step three: at the temperature at which the chiral compound was added, a white liquid having fluidity was filled into the glass interlayer and cooled to room temperature, to obtain a trans-type liquid crystal light adjusting glass.
2. The method for preparing the trans-form liquid crystal dimming glass based on the liquid crystal physical gel according to claim 1, wherein the method comprises the following steps: the nematic liquid crystal in the first step is SLC-1717, HTG135200-100, SLC-9023, C5 or XH154T7023-000.
3. The method for preparing the trans-form liquid crystal dimming glass based on the liquid crystal physical gel according to claim 1, wherein the method comprises the following steps: the physical gel of the first step is benzylidene sorbitol, di (p-methylbenzylidene) sorbitol or di (3, 4-dimethyl benzylidene) sorbitol.
4. The method for preparing the trans-form liquid crystal dimming glass based on the liquid crystal physical gel according to claim 1, wherein the method comprises the following steps: the chiral compound in the second step is R5011, S811, R1011 or CB15.
5. The method for preparing the trans-form liquid crystal dimming glass based on the liquid crystal physical gel according to claim 1, wherein the method comprises the following steps: the temperature control rate of gradually reducing the control temperature of the second step is 1-4 ℃/min.
6. The method for preparing the trans-form liquid crystal dimming glass based on the liquid crystal physical gel according to claim 1, wherein the method comprises the following steps: the glass interlayer in the third step is made of transparent glass with one surface coated with indium tin oxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310958330.0A CN117148640A (en) | 2023-08-01 | 2023-08-01 | Preparation method of trans-type liquid crystal dimming glass based on liquid crystal physical gel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310958330.0A CN117148640A (en) | 2023-08-01 | 2023-08-01 | Preparation method of trans-type liquid crystal dimming glass based on liquid crystal physical gel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117148640A true CN117148640A (en) | 2023-12-01 |
Family
ID=88910930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310958330.0A Pending CN117148640A (en) | 2023-08-01 | 2023-08-01 | Preparation method of trans-type liquid crystal dimming glass based on liquid crystal physical gel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117148640A (en) |
-
2023
- 2023-08-01 CN CN202310958330.0A patent/CN117148640A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3617786B1 (en) | Optical modulation device | |
| Doane | Polymer dispersed liquid crystal displays | |
| US5621552A (en) | Electrooptical liquid crystal system containing dual frequency liquid crystal mixture | |
| US4688900A (en) | Light modulating material comprising a liquid crystal dispersion in a plastic matrix | |
| EP1743931B1 (en) | Liquid crystal display device | |
| JP4027939B2 (en) | Display element and display device | |
| US5401437A (en) | Polymer dispersed liquid crystal for wide viewing angle | |
| JP2700006B2 (en) | Liquid crystal display device | |
| CA1268032A (en) | Light modulating material comprising a liquid crystal dispersion in a plastic matrix | |
| JP2017133018A (en) | Smectic A composition for use in optical device | |
| US7859638B2 (en) | Method for driving liquid crystal light modulating device, and liquid crystal light modulating device | |
| KR100745115B1 (en) | Liquid crystal display devices | |
| JP7120013B2 (en) | Materials for liquid crystal devices and liquid crystal devices | |
| EP2725085B1 (en) | A composite comprising a polymer and a blue phase liquid crystal, a method for preparing the composite, and a liquid crystal display device comprising the composite | |
| CN107667314B (en) | Liquid crystal cell | |
| JP4394317B2 (en) | Method of using liquid crystal mixture, liquid crystal cell and dye | |
| US20130321754A1 (en) | Fumed Metal-Oxide Gel-Dispersed Blue-Phase Liquid Crystals and Devices Thereof | |
| GB2080561A (en) | Liquid crystal display device | |
| US7758772B2 (en) | Composition comprising a liquid crystal material and an additive | |
| CN117148640A (en) | Preparation method of trans-type liquid crystal dimming glass based on liquid crystal physical gel | |
| Zhou et al. | Bistable polymer-stabilized cholesteric-liquid-crystal window based on flexoelectric and dielectric effects | |
| EP3894950B1 (en) | Switchable window element | |
| KR101043248B1 (en) | Cholesteric liquid crystal display | |
| CN104460167A (en) | Liquid crystal layer, preparation method of liquid crystal layer and liquid crystal display device with liquid crystal layer | |
| Park et al. | Fast switching of vertically aligned liquid crystals by low-temperature curing of the polymer structure |
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 |