57 results about "Mesogen" patented technology

A liquid crystal composition contains a side chain type polymer liquid crystalline compound which can form a light absorption anisotropic film having a high alignment degree and has excellent solubility in a general-purpose solvent, a light absorption anisotropic film obtained using the composition, a laminate, and an image display device. The composition includes: a side chain type polymer liquid crystalline compound; and a dichroic substance, in which the compound is a copolymer having a repeating unit (1) containing a mesogenic group with a molecular weight of greater than 280 and a repeating unit (2) with a molecular weight of 280 or less, a content of the repeating unit (2) is less than 14% by mass with respect to a total mass of the compound, and a content of the dichroic substance is greater than 2% by mass with respect to a total solid content of the composition.

The invention relates to polymerizable liquid crystal formulations (as a subcategory of liquid crystal material), especially to polymerizable ink formulations for inkjet printing, which are preferably PFAS-free (for enabling the reduction of perfluorocarbons and providing an environment friendly material), and which are comprising one or more polymerizable mesogenic compounds, also known as reactive mesogens (RMs), and one or more organic solvents selected from the group of aromatic ester and aromatic or aliphatic diester solvents, to polymers and polymer films obtained from such formulations, and to the use of the formulations, polymers and polymer films in optical or electrooptical components or devices, especially for digital optics or augmented reality or virtual reality (AR / VR) applications like polarizers, optical compensators, reflective films, diffraction or surface gratings, Bragg polarization gratings (Bragg PG), polarization volume gratings (PVG), polarization volume holograms (PVH), Pancharatnam Berry (PB) gratings, nonmechanical beam steering elements, optical waveguides, optical couplers, optical combiners, polarization beam splitters, partial mirrors, lenses or PB lenses.

The present invention relates to dichroic dye compounds of formula I, as defined in claim 1, which are based on the donor-acceptor structure wherein the donor moiety comprises a polycyclic heteroaromatic group consisting of at least four fused rings, to mesogenic media comprising one or more compounds of formula I, the present invention relates to novel compounds, mesogenic media and liquid crystal materials, and to the use of these compounds, mesogenic media and liquid crystal materials in optical, electronic and electro-optical applications, in particular in devices for regulating energy through external spaces into internal spaces, for example in switchable windows for solar control in smart buildings and vehicles, with energy conservation and improved comfort.

This invention relates to liquid crystal media comprising polymerizable compounds. Specifically, this invention relates to liquid crystal (LC) media comprising a polymerizable component A containing polymerizable compounds, at least one of which is a polymerizable self-aligning additive of formula MES-Ra(I) for vertical alignment, and a liquid crystal LC component B comprising one or more mesocrystalline or liquid crystal compounds selected from formulas CY and PY, wherein the formulas are as follows and defined in the claims, and other additives (HH) comprising organic molecules having groups having at least six of the following formulas.

The application discloses a preparation method and application of a ferrihydrite / mesoporous TiO2, and comprises the following steps: dissolving FeCl3*6H2O and NaAc in ethylene glycol, stirring, storing, cooling, and obtaining black precipitate; centrifuging, washing and drying the black precipitate to obtain black nano Fe3O4; adding Fe(NO3)3*9H2O into a reaction container, stirring, adding the black nano Fe3O4, stirring, adding NaOH to adjust pH, stirring, adding distilled water, aging, washing with water, and drying to obtain magnetic ferrihydrite; mixing TiF4, H2O, NH4NO3 and NH4F to prepare a precursor solution, dropping the solution onto a silicon chip, heating and calcining, and keeping warm to obtain powder; calcining the powder in an O2 / Ar atmosphere, grinding to obtain mesoporous TiO2; ultrasonic treating the mesoporous TiO2, adding the magnetic ferrihydrite, adjusting pH, heating, keeping warm, and filtering, washing and drying to obtain ferrihydrite / mesoporous TiO2. The ferrihydrite / mesoporous TiO2 prepared by the preparation method can efficiently degrade volatile organic pollutants (VOCs).

The present invention relates to a liquid-crystalline medium, preferably having a nematic phase, comprising one or more compounds of formula (C) wherein the parameters have the meanings given herein, to the use thereof in energy-efficient electro-optic displays, in particular in active matrix displays based on the IPS or FFS effect, and to the use thereof in energy-efficient electro-optic displays, especially in active matrix displays based on the IPS or FFS effect. Relates to a liquid crystal medium of this type, to a display of this type containing this type, and to the use of a compound of formula (C) for improving the contrast and / or response time of a liquid crystal medium comprising one or more additional mesogenic compounds as defined herein.

Optionally polymerizable mesogen compounds are disclosed that include a polyvalent non-mesogenic core X to which is bonded three or four separate extensions, where each extension independently includes, in sequence, a linking group -L-, and a mesogen group—[Mesogen]. The mesogen compounds are represented by the following Formula (I),With reference to Formula (I), v is 3 or 4; t is 0 or 1; at least one Mesogen includes at least four cyclic groups; each -L- independently has an average chain length of at least 15 bonds; and at least one -L- has an average chain length of at least 25 bonds. Liquid crystal compositions are disclosed that include such mesogen compounds, and optical elements that include such mesogen compounds.

Spectacle lens, characterized in that it has at least one layer of a transparent liquid crystal elastomer (LCE layers), • where each LCE layer has a reconfigurable anisotropic mesogen structure, • each LCE layer is surrounded by at least one alignment layer which determines the orientation of the mesogens along a fixed azimuth direction, • where polarization independence is ensured by either providing two LCE layers with orthogonally offset azimuth axes or dividing a single LCE layer into segments whose main azimuth axes are alternately orthogonally offset or using a retardation foil for the necessary phase shift, • wherein the mesogens within the LCE layers are locally variably alignable to produce an optically effective phase profile - which preferably represents a Fresnel phase profile - by means of which the effective focal length of the spectacle lens is reconfigurable, • wherein each LCE layer is based on a reversibly cross-linkable polymer network that allows multiple rearrangement of the mesogen alignment, and wherein the LCE layers together have high transparency in the visible wavelength range and the ophthalmic lens is free from perceptible optical distortions, scattering effects or interference, regardless of the polarization of the incident light.

A liquid crystal device is provided having at least two opposing transparent substrates, at least one liquid crystal switching layer sandwiched between the opposing substrates. The liquid crystal layer contains one or more polymerized photoreactive mesogens of formula I,R11-Sp11-X11[-A-Z]o-A11-CY11—CY12[—C—O]x[—O]y-A[-Z-A]p-X21-Sp21-R21  Iwherein R11, R21, A11, A, Z, X11, X21, Y11, Y12, Sp11, Sp21, o, p, x and y are as defined herein, and one or more nematogenic compounds. An electrode structure is provided on one or both of the opposing substrates, and one or more of the substrates are additionally provided with an optical grating or a lens structure adjacent to the liquid crystal switching layer.

The present application relates to a liquid-crystalline medium, which preferably has a nematic phase and a dielectric anisotropy of 0.5 or more, comprising one or more compounds of formula T in which the symbols and the other parameters have the meanings given herein, to its use in electro-optical displays, in particular in active matrix displays based on the IPS or FFS effect, to such displays comprising such a liquid-crystalline medium and to the use of compounds of formula T for improving the transmission and / or the response time of a liquid-crystalline medium comprising one or more further mesogenic compounds.

Provided are articles including a substrate and a cured composition of a curable composition comprising 50 to 81 weight percent of a liquid crystal monomer, 1 to 24 weight percent of a chain extender, 6 to 26 weight percent of a crosslinker, and 0 to 1.5 weight percent of an initiator, wherein the curable composition is adjacent to the substrate, wherein the curable composition is in the form of a continuous or discontinuous layer, and wherein the cured composition comprises a mesogen orientation gradient. Also provided are methods of making mesogen orientation gradients and articles including the same.

An optical unit includes optical element with first and second substrates; liquid crystal (LC) material including mesogens; first and second electrodes deposited on surface of first and second substrates; test circuit including: first resistor (R1) and second resistor (R2) formed by trace of first and second electrodes; test capacitor (C) formed by LC material, wherein R1, R2 and C are connected in series; and processor(s) configured to: determine reference peak voltage (PV) at first time instant (TI); determine test PV at second TI; determine variation in capacitance of mesogens between first and second TI; determine state of mesogens at second TI, based on variation in capacitance of mesogens; adjust driving parameter of drive signal to change optical parameter of optical element, based on state of mesogens.

The invention discloses a carbon fiber composite material with synergistically improved interface and heat-conducting property as well as a preparation method and application of the carbon fiber composite material. The surface of the carbon fiber is subjected to non-covalent modification through the first assembly layer, the surface activity of the carbon fiber is effectively improved on the premise that the graphite structure on the surface of the fiber is not damaged, meanwhile, the liquid crystal polymer in the second assembly layer has the rigid-flexible characteristics of a rigid mesogenic element and a flexible spacer chain, and the liquid crystal polymer is matched with the high fluidity and self-adaptability of liquid metal; the interface performance of the composite material is improved. In addition, by means of complementation and coupling of phonon and electron heat transfer mechanisms at the interface, the interface thermal resistance is remarkably reduced, and therefore the heat conduction performance of the composite material is improved.

The application discloses a chiral nematic liquid crystal grating based on an asymmetric orientation template and a preparation method, relates to the field of liquid crystal diffraction optical devices and near-eye display (XR / AR) optical waveguide coupling grating manufacturing technology. The preparation method comprises the following steps: step S10: providing a first substrate and a second substrate and preparing an orientation layer; step S20: forming an asymmetric grating orientation template; step S30: assembling a liquid crystal box; step S40: filling a reactive mesogen mixture; step S50: inducing by temperature reduction and curing under ultraviolet light to form a stable chiral nematic liquid crystal grating. The application adopts an asymmetric orientation template, avoids the high-precision registration requirement of double-sided patterning orientation on period and phase and the risk of orientation disorder, effectively suppresses defects such as dislocation and domain boundary, improves the structural integrity of the grating and the stability of the diffraction efficiency, and simultaneously reduces the equipment and process requirements, improves the yield and consistency in mass production.

A dust core includes magnetic particles, an epoxy resin, and an additive. The epoxy resin has at least two or more mesogenic skeletons between two epoxy bonds adjacent along a molecular chain. The additive includes one or more metallic elements selected from Li, Ba, Mg, and Ca.

A method of manufacturing a thin film optical apparatus includes providing a substrate and applying an alignment layer over the substrate. The alignment layer ranges from about 50 to 100 nm in thickness. The method includes imprinting a hologram with a desired optic pattern onto the alignment layer and applying at least one layer of mesogen material over the alignment layer.

The invention relates to a flat alignment composition and a display panel. The flat alignment composition comprises a copolymer, and the copolymer has a structural formula as shown in a formula (1), b is selected from a crosslinking group; n is any integer selected from 30 to 500; the copolymer in the flat alignment composition provided by the invention contains a mesogenic structure, so that the flat alignment layer has an alignment effect; meanwhile, the copolymer also contains a crosslinking group, so that the crosslinking degree after film formation is improved, the heat resistance and the stability of the flat alignment layer are improved, a film layer with higher flatness is favorably formed, and the flat alignment layer can have a flattening effect; therefore, the flat alignment layer can simultaneously have the functions of a flat layer and an alignment layer, the process can be simplified, and the cost can be reduced.

An optical film, polarizing plate, and image display device are provided, each including an optically anisotropic layer in which both precipitate formation and cohesive failure are suppressed. The optically anisotropic layer is a liquid crystal cured layer formed from a liquid crystal composition containing a liquid crystal compound and a surfactant, the liquid crystal compound being immobilized in a vertically aligned state and exhibiting reverse wavelength dispersibility. The surfactant includes a repeating unit H having a fluorinated alkyl group or a silicon-containing group. At least one surfactant further includes repeating unit K having a functional group capable of crosslinking with the liquid crystal compound and repeating unit M having a mesogen group. A content of repeating unit X in the surfactant, having an I / O value difference of 0.9 or more relative to the liquid crystal compound, is 8 mol % or less.

The invention provides an inclined spiral cholesteric liquid crystal composition and a liquid crystal display device comprising the same. The inclined spiral cholesteric liquid crystal composition comprises at least one nematic liquid crystal composition, at least one chiral agent and at least one mesogenic component, and the nematic liquid crystal composition comprises at least one compound shown in the general formula I. When the inclined spiral cholesteric liquid crystal composition is applied to a liquid crystal display device, high-reflectivity visible light wave band color display can be obtained under the driving of a small driving voltage, and the inclined spiral cholesteric liquid crystal composition has a large ratio of the reflectivity of color light to the reflectivity of a black back bottom, has a good display contrast ratio and can be applied to the field of liquid crystal display devices. Therefore, both high electric efficiency and good color display can be considered. When a multilayer display device is filled with the inclined spiral cholesteric liquid crystal composition, modulation of black, white and different visible light colors can be achieved. The liquid crystal display device can realize different-color display of different display areas, and has a wide application space.

The invention discloses a general synthesis method of a sub-nano transition metal nitride nanowire. The general synthesis method comprises the following steps: (1) preparing a W18O49 one-dimensional mesocrystal; (2) ion exchange preparation of a metal oxide precursor: dispersing the W18O49 one-dimensional mesocrystal in a metal ion ethanol solution, and stirring for ion exchange reaction to obtain a one-dimensional nanowire precursor; and (3) molten salt assisted nitridation reaction: uniformly mixing the W18O49 one-dimensional mesocrystal or the metal oxide one-dimensional nanowire with NaI or KCl or a mixed salt of NaI and KCl, heating and cooling in an NH3 / N2 mixed atmosphere, washing a product, and carrying out vacuum drying to obtain the TMN nanowire. The invention further provides application of the sub-nano transition metal nitride nanowire, the problems of high-temperature limitation and structure control of traditional TMN synthesis are solved, and an SERS platform without background interference is provided for trace detection.

This invention provides a silicon-chain acrylic liquid crystal photosensitive resin and its preparation method. A compound containing mesocrystalline units with -OH terminals, EHC, and catalyst 1 are mixed and reacted to obtain solution A. NaOH is added dropwise to solution A to remove the water generated in the reaction. After continuing the reaction, the product is filtered, and excess EHC is removed from the filtrate to obtain solution B. Solution B is mixed with methanol / acetone, and the resulting crystals are washed, filtered, and dried to obtain liquid crystal epoxy resin C. C is mixed with an inhibitor and reacted, then acrylic acid and catalyst 2 are added dropwise to react and obtain acrylic liquid crystal photosensitive resin D. D is mixed with 1,1',3,3'-dimethyldisiloxane, and a solvent, catalyst 3, and inhibitor are added to carry out a hydrosilylation reaction to obtain silicon-chain acrylic liquid crystal photosensitive resin E. The silicon-chain acrylic liquid crystal photosensitive resin provided by this invention can be widely used in artificial muscles, actuators, shape memory, smart devices, and some highly elastic advanced composite materials.

The invention relates to an MXene / liquid crystal elastomer multi-spectrum stealth intelligent coating. An MXene nanocone array bottom layer is constructed through directional freeze drying, a middle layer is a mesogenic element oriented liquid crystal elastomer composite film, and a top layer is a super-hydrophobic protective layer. An electric field is used for regulating and controlling the orientation state change of liquid crystal molecules, and dynamic radar wave absorption, large-range adjustment of infrared emissivity and rapid switching of laser reflectivity are synchronously achieved. The preparation method comprises the key processes of MXene surface modification, nanocone array construction, electric field auxiliary coating and curing and the like. The coating is suitable for multi-spectrum stealth of military equipment such as warplane skin and shipborne equipment.

The invention provides a circularly polarized light (CPL) thin film material based on a polymer chiral nematic phase liquid crystal and having a high luminescence asymmetry factor (glum value), and a preparation method and application of the circularly polarized light (CPL) thin film material. The method comprises the following steps: synthesizing an achiral methoxy azobenzene monomer (Az) and a chiral dopant (Azo-R5); az reversible addition-fragmentation chain transfer (RAFT) polymerization is utilized to obtain an achiral side chain type azobenzene polymer (PAz); a mixed tetrahydrofuran solution of PAz, Azo-R5 and Nile red (NR) is spin-coated to form a film, and the film is dried and annealed to prepare the circularly polarized light-emitting film material. The circularly polarized light-emitting thin film material has a red-emitting high-glm value, it is proved that the central chirality is successfully transferred between polymer side chains through the interaction between mesogenic primitives, an N *-LC phase with a periodic spiral structure is formed, and a new way is provided for constructing an intrinsic light-emitting high-glm-value CPL material.

The present invention relates to reactive mesogens (RMs) with high birefringence and low absorption, RM mixtures and formulations comprising such RMs (as subspecies of liquid crystal materials), polymers and polymer films obtained from such RMs and RM mixtures, and the use of such RMs, RM mixtures, formulations, polymers and polymer films in optical or electro-optical components or devices, this use is particularly for digital optical or augmented reality or virtual reality (AR / VR) applications such as polarizers, optical compensators, reflective films, diffractive or surface gratings, Bragg polarization gratings (Bragg PG), polarized volume gratings (PVG), polarized volume holograms (PVH), Pangulamm-Bell (PB) gratings, optical waveguides, lenses or PB lenses.

The invention discloses a high-adhesion and high-transparency liquid crystal polyimide film and a preparation method thereof. According to the method, a space electric field is used for inducing mesogenic element vertical orientation to obtain high transparency and a low thermal expansion coefficient, meanwhile, polar groups in precursor molecules are synchronously driven to migrate and orientate towards a substrate interface, and by enhancing electrostatic interaction and interface chemical bonding, the interface adhesion of the thin film is remarkably improved; the prepared film has excellent optical performance, thermal stability and mechanical reliability, and the process is simple, green and efficient. The polyimide film prepared by the invention realizes perfect combination of high transparency and high peel strength while maintaining excellent heat resistance and mechanical strength, meets the strict requirements of high-end flexible electronic devices, and has wide application prospects in the fields of flexible electronics and display.

The invention discloses an electrode material for electrocatalytic reduction of nitrate, the electrode material takes a porous titanium plate as a carrier, in-situ synthesized titanium dioxide mesocrystals are distributed in micropores of the porous titanium plate, the carrier contains 20-30% by volume of oxygen vacancies, and the carrier loads bimetallic monoatoms. Wherein the mass percentage content of bimetallic single atoms in the electrode material is 0.2-5%; and the bimetals comprise two of Cu, Co, Fe, Ni and Sn. According to the electrode material disclosed by the invention, mesocrystal titanium dioxide is adopted as a carrier, so that the electrode material has excellent structural stability, * NO adsorption energy is remarkably optimized, a desorption energy barrier is reduced, and the selectivity of generating N2 through electro-catalysis of nitrate is improved.

An LCoS panel in which liquid crystal is pre-aligned at a predetermined angle and the risk of short circuit is reduced, and a manufacturing method therefor are disclosed. According to one aspect of an embodiment, the LCoS panel is provided, the LCoS panel comprising: a silicon substrate having an alignment film disposed on one surface thereof; an upper substrate having a transparent electrode and an alignment film disposed on one surface thereof, and forming a space into which liquid crystal is to be injected; a seal line printed or drawn between the two substrates so that respective substrates can maintain an interval and form a liquid crystal accommodation space therebetween; the liquid crystal which include a predetermined amount of photoreactive mesogens and which is injected into the liquid crystal accommodation space; and an encapsulant for preventing the liquid crystal from being discharged from the liquid crystal accommodation space by encapsulating a liquid crystal injection port of the seal line, wherein the alignment film undergoes rubbing and, even if the rubbing is performed, a pattern caused by the rubbing is not included in an image output from the LCoS panel, and the transparent electrode undergoes patterning.

The present invention relates to a chromogenic radiative cooling element comprising a liquid crystal layer including a cholesteric liquid crystal that includes a reactive mesogen compound and a chiral dopant and has a pitch in the range of 50 nm to 550 nm, thus maintaining excellent cooling performance while producing various colors.