126 results about "Thermochromism" patented technology

The invention relates to a temperature measurement visual tactile sensor. The sensor comprises a main body, a main body shell and a detachable touch sensing structure on the top of the main body shell, in the main body, a uniform light film is additionally arranged between the light isolation ring and the LED lamp panel below the light isolation ring; the detachable touch sensing structure comprises a detachable structure shell and a sensing layer; wherein the sensing layer is mounted at the top of the inner side of the shell with the detachable structure; the sensing layer comprises a PDMS layer, a quartz glass layer, a semitransparent silica gel layer, a PDMS layer doped with a thermochromic material, a first reflecting layer and a second reflecting layer; the second reflecting layer covers the first reflecting layer. The temperature range of 35-75 DEG C is covered, the temperature change can be visually displayed, the response time and the recovery time are extremely short, the high-precision temperature monitoring capability is achieved, and the temperature sensor is suitable for various daily temperature monitoring scenes.

The present invention relates to a coating for the surface of a household item comprising a decoration (a) that comprises a thermochromic pigment compound of formula BiOA1-xBx (I) where: - A and B are selected from the group consisting of iodine, fluorine, chlorine and bromine; A and B are different from one another; and - x is between 0 and 1, the decoration (a) being in the form of a layer that exhibits a reversible variation in its optical and / or colorimetric properties when the coating comprising it is subjected, in whole or in part, to a variation in temperature between a cold temperature and a hot temperature, the cold temperature being between 0°C and 40°C and the hot temperature being between 80°C and 400°C.

The invention relates to the field of temperature-sensitive materials, in particular to a thermal management fiber membrane and a preparation method thereof. The heat management fiber membrane comprises a base body layer, a color changing layer and a color matching layer which are sequentially arranged in a stacked mode. And the matrix layer is a fiber membrane made of a spinning material. And the color-changing layer is formed by curing a water-soluble adhesive doped with thermochromic microcapsules. The thermochromic microcapsule is gradually and reversibly converted into a white state from a black state along with the rise of the temperature. And the color matching layer is formed by coating photonic crystal emulsion. The thermochromic microcapsule endows the thermal management fiber membrane with a temperature-sensitive discoloration capability so as to adjust the heat absorption and heat dissipation capability at different temperatures. The photonic crystals endow the thermal management fiber membrane with rich colors. The thermochromic microcapsule is attached to the surface of the fiber membrane through the water-soluble adhesive, so that the response speed of color change of the thermochromic microcapsule is increased, and wall material damage caused when the thermochromic microcapsule is doped in a spinning solution for spinning can be prevented, so that the performance of the thermal management fiber membrane is optimized, and the service life of the thermal management fiber membrane is prolonged.

The invention relates to the technical field of thermochromism glass application, in particular to a thermochromism turnover window with a dual-mode adjusting function. The thermochromism turnover window comprises a window sash sealing component, thermochromism glass, a window body rotating shaft, a window frame body and double-layer hollow glass. The window sash sealing component is rotationally mounted on one side of the window frame main body; the window body rotating shaft is mounted on the window frame main body; a cavity is formed between the double-layer hollow glass and the thermochromic glass; ventilation openings are reserved in the top and the bottom of the window body rotating shaft; the ventilation opening is communicated with the cavity; the window body rotating shaft rotates by an angle to adjust the mode of the turnover window; in the heat insulation mode, the thermochromic glass faces outwards, and the cavity is communicated with the outdoor environment; in the heat preservation mode, the thermochromic glass faces inwards, and the cavity communicates with the indoor environment; according to the window body, the characteristics of the thermochromic material and a physical overturning structure are fully utilized, dual-mode indoor environment photo-thermal adjustment is achieved, the indoor photo-thermal environment of a building can be improved, and the energy efficiency and the comfort degree are improved.

The invention discloses a phase change energy storage and thermochromism cable overheat protection structure, which belongs to the technical field of cables, and comprises a conductor and a sheath layer, the sheath layer is arranged on the outer side of the conductor, a gradient phase change layer is arranged between the conductor and the sheath layer, the gradient phase change layer is made of paraffin / expanded graphite composite phase change material and coats the outer surface of the conductor, and the outer surface of the gradient phase change layer is coated with a thermochromism layer. The gradient phase change layer can absorb overload heat; the sheath layer comprises a base material, a thermochromic pigment and butyl stearate, the thermochromic pigment takes the base material as a matrix, and the color of the sheath layer is changed along with the change of the temperature. According to the invention, the gradient phase change layer is arranged between the conductor and the sheath layer, so that when a traditional cable is overloaded, the temperature of the conductor rises quickly, the protection response of a circuit breaker and the like lags behind, and the temperature rise cannot be inhibited at the initial stage of abnormal temperature. The gradient phase change layer is arranged to absorb heat, 30% of overload heat can be absorbed, peak temperature rise of the conductor is reduced, the temperature rise rate is reduced, the temperature rise process is obviously delayed, and the hysteresis defect of action of the circuit breaker is overcome.

The application discloses a kind of satellite-borne infrared emissivity differential measurement method and device using cold black background, belong to spacecraft thermal control and material on-orbit testing technical field, purpose is to eliminate environmental stray radiation and conduction heat leakage interference, realize material emissivity high-precision in-situ on-orbit test.The application relies on deep space cold black environment and differential disturbance thought, supporting layout emissivity known standard unit and unit to be measured, make two in consistent light thermal condition, respectively establish transient heat balance equation.Because two kinds of units are consistent, such as common-mode interference of stray radiation, conduction heat leakage, two formula difference can be removed interference term, only keep and emissivity related radiation heat loss term.Through the design of different thermal control conditions (such as balance heating, constant temperature control, dynamic heating), the real emissivity of the material to be measured is solved.The application is suitable for in-situ, high-precision measurement of the infrared emissivity of spacecraft surface materials, especially intelligent thermal control materials such as thermochromic materials in space environment.

A fluid separator with solid level indicator includes a container having a cavity. The container includes a fluid inlet and multiple fluid outlets. The fluid separator further includes a fire tube extending into the cavity to dissipate heat into the cavity. The fluid separator also includes a thermochromic indicator that is on the outside of the container, where the thermochromic indicator covers at least a portion of the container. A color of the thermochromic indicator depends on a temperature of the container at a location of the thermochromic indicator on the outside of the container. The temperature of the container at the location of the thermochromic indicator depends on whether the container contains solid at an inside location that is at least partially aligned with the location of the thermochromic indicator.

The invention relates to the technical field of nondestructive testing of low-carbon steel, and particularly discloses a thermal double-sensitive composite coating as well as a preparation method and application thereof. The thermal double-sensitive composite coating comprises a stress sensitive fluorescent layer and a thermochromic layer, the stress sensitive fluorescent layer adopts core-shell hybrid particles with a force-induced fluorescence enhancement effect as key functional filler, and the thermochromic layer adopts an IPN-based irreversible thermochromic material as a core functional material. The stress-sensitive fluorescent layer and the thermochromic layer are prepared from novel self-made functional materials, so that the thermal double-sensitive composite coating has the functions of high-sensitivity signal sensing, optical enhancement and permanent recording, and is assisted by a load excitation and digital image analysis process; stress-temperature coupling field information excited by the deep defect under the load is converted into a visual signal which is high in strength, high in anti-interference performance and capable of being recorded permanently, and accurate positioning, quantification and classification of the defect are achieved.

This invention discloses a thermochromic smart window, which contains at least one layer of thermochromic material. The core functional material of the thermochromic material is a core-shell structured thermochromic material, with doped vanadium dioxide nanoparticles as the core and a metal-organic framework as the shell. The thermochromic smart window of this invention exhibits high stability, good optical properties, and the ability to achieve synergistic photothermal response, making it particularly suitable for home use. Furthermore, its preparation method is simple, requires mild conditions, and is highly compatible with existing laminated glass manufacturing processes, facilitating industrialization. It not only responds to changes in ambient temperature but also sensitively responds to changes in solar radiation intensity, achieving intelligent regulation of solar thermal energy.

An electrical protection device includes a housing including a plurality of sidewalls. The plurality of sidewalls includes one or more thermochromic sidewalls. The electrical protection device includes a switch assembly located in the housing and an electrical connector extending from the housing. The electrical connector is configured to place the switch assembly in electrical connection with a main bus at an electrical distribution panel. In response to a condition at the electrical protection device causing a temperature of a respective thermochromic sidewall of the one or more thermochromic sidewalls to exceed a temperature threshold, the respective thermochromic sidewall is configured to provide an indication of the condition of the electrical protection device. The indication may be a visual indication including a color change and an expansion of the material. The indication may be an audible indication including emitting a noise.

The invention discloses a thermochromic material and a preparation method thereof, an intelligent film and intelligent glass. The thermochromic material is prepared from the following raw materials: an organic phase change material, a deep eutectic solvent, a photoinitiator and a cross-linking agent, the deep eutectic solvent is composed of a hydrogen bond donor and a hydrogen bond acceptor; the hydrogen bond donors comprise a donor I and a donor II; at least one of the structural formulas of the donor I and the donor II contains a double-bond structure; the invention provides a novel thermochromic material, the preparation raw materials of the material comprise an organic phase change material and a deep eutectic solvent, and the organic phase change material provides a first thermal response temperature point. The deep eutectic solvent provides a second thermal response temperature point. The two thermal response temperatures are wide. Therefore, the thermochromic material disclosed by the invention can realize the effects of indoor lighting, shading and temperature regulation by regulating and controlling the two thermal response temperature points.

Provided are: a reversible thermochromic composition which takes on highly fluorescent red or pink color at the time of color development; and a reversible thermochromic microcapsule pigment containing the same.　Provided is a reversible thermochromic composition which comprises at least: (a) a fluoran derivative which serves as an electron-donating coloring organic compound and has a specific structure; (b) an electron-accepting compound; and (c) a reaction medium that reversibly causes an electron transfer reaction by means of component (a) and component (b) in a specific temperature range. Also provided is a reversible thermochromic microcapsule pigment which contains the reversible thermochromic composition.

A system includes a conduit configured to transport fluid between a first location and a second location, and a thermochromic indicator disposed on an outer surface of the conduit. The thermochromic indicator covers at least a portion of the conduit. A color of the thermochromic indicator depends on a temperature of the outer surface of the conduit, and the temperature of the outer surface of the conduit depends on an amount of material deposition inside the conduit that is at least partially aligned with a location of the thermochromic indicator.

The utility model discloses a wire warning device capable of changing colors, which relates to the technical field of wire protection and comprises a thermochromic wire pipe, a wire inlet is arranged on one side of the thermochromic wire pipe along the length direction of the thermochromic wire pipe, and the edges of the thermochromic wire pipe on two sides of the wire inlet extend outwards to form sealing edges. The corresponding sides of the two sealing edges are provided with a clamping groove and a clamping block respectively, the clamping groove and the clamping block are buckled to be used for closing the wire inlet, and an elastic heat conduction lining is arranged on the inner side of the thermochromic wire pipe. According to the color-changeable wire warning device, the thermochromic wire pipe can be heated to change color when the wire is heated, and visual warning is provided, so that the safety and the reliability of power transmission are improved.

To provide a repeatedly usable writing way learning tool which enables even a preschooler who is not accustomed to handling a writing instrument or the like to efficiently learn with a real feeling of writing and enables a third person to visually determine whether or not a user can correctly trace and learn a model because a color of the model changes or a size or shape of the model changes when the model such as a character is traced with a fingertip.SOLUTION: A writing way learning sheet in which a model selected from the group consisting of characters, numbers, and symbols is provided on a base material, wherein the model contains a reversible thermochromic material and reversibly changes in color from a colored state to a different colored state, and the reversible thermochromic material has a complete decoloring temperature t4 of 26 to 37°C and exhibits a hysteresis width (ΔH) of 5°C or less with respect to a color density-temperature curve.SELECTED DRAWING: Figure 3

To provide a thermochromic color memory composition that employs a specific ester compound and exhibits a color memory effect in a low temperature range.SOLUTION: A thermochromic color memory composition comprising at least: (i) an electron-donating chromogenic organic compound, (ii) an electron-accepting compound, and (iii) a specific reaction medium for controlling the chromogenic reaction of the component (i) and the component (ii), wherein the thermochromic color memory composition undergoes color change with a hysteresis width (ΔH) of 8 to 100°C in a color density-temperature curve, wherein a complete coloring temperature t1 is equal to or lower than -30°C, and a complete decolorizing temperature t4 is in a range of -25 to 15°C.SELECTED DRAWING: None

The application discloses a full-automatic color difference and temperature curve fitting intelligent heating table, which takes an STM32F407VET6 single-chip microcomputer as a core main control unit, and integrally integrates a high-precision temperature control and heating module, a full-automatic image acquisition module, a real-time color difference analysis module, an intelligent curve fitting module and a linkage control module. After preset parameters of a user, the system automatically completes heating temperature control, triggers image acquisition, color difference value extraction, data binding storage at constant temperature or constant time, and automatically completes curve fitting based on multiple sets of temperature-color difference value data, and outputs optimal fitting results. The application realizes full-process automation of "temperature control-acquisition-value extraction-fitting", does not need manual intervention, solves problems of complicated operation, large data error and low efficiency of a traditional method, and is suitable for rapid acquisition of color difference-temperature curves of multiple samples such as thermochromic coating and high polymer materials.

The present invention discloses a purple developing toner with reversible thermochromic properties and a preparation method thereof. The toner is made of the following raw materials in parts by weight: 80-90 parts of styrene-acrylic acid copolymer, 4-6 parts of polypropylene wax, 2-4 parts of thermochromic material, 1-3 parts of charge control agent, 2-4 parts of fumed silica, and 1-3 parts of titanium dioxide; the above materials are sequentially subjected to high-speed mixing, mixing, cooling, coarse grinding, airflow crushing classification, micro powder classification, pre-external additive mixing, spheroidization treatment, post-external additive mixing, sieving, and packaging to prepare a toner product. The present invention imparts a thermochromic effect to the toner, showing purple at room temperature and red under a heat source, realizing the anti-counterfeiting function of a printing toner based on the toner, and the printed text can be changed in color by a certain heat source. After removing the heat source for a period of time, the color can be restored; the thermochromic effect is reversible.

The invention relates to the technical field of intelligent color changing devices, and discloses a thermochromic camouflage device and a preparation method and application thereof. The thermochromism camouflage device comprises a substrate, a reflection spacing layer and a thermochromism layer which are sequentially arranged in a composite mode in the thickness direction. The reflection spacing layer is an intrinsic black heat-conducting polyimide film; and the thermochromic layer is a polymer dispersed cholesteric liquid crystal film. The composite black heat-conducting polyimide film is synthesized through a two-step method to serve as a reflection spacing layer for replacement, a transparent polyimide protection layer and a black ink reflection layer of a traditional color-changing camouflage device are combined into a whole, the device structure is reduced from three layers to two layers, the device thickness is remarkably reduced, the interface layering defect is eliminated, and the device performance is improved. The flexibility and the interlayer adhesive force are improved. The intrinsic black heat-conducting polyimide film has the functions of substrate supporting, shading and heat conducting, black ink does not need to be additionally coated, the device preparation process is simplified, the production cost is reduced, and heat accumulation is reduced.

The invention relates to the technical field of thermochromic materials, in particular to a mixture of multi-color-gamut and multi-stage controllable thermochromic microcapsules and a preparation method of the mixture, and the mixture of the thermochromic microcapsules comprises at least two thermochromic microcapsules; each thermochromic microcapsule comprises a core material and a wall material, the core material comprises a color developing agent, a leuco agent and a thermal response carrier, the melting points of the thermal response carriers of the thermochromic microcapsules are different, and the unresponsive colors of the thermochromic microcapsules have obvious chromatic aberration. The thermochromic microcapsules with different thermal reaction carrier melting points are synergistically matched, so that a mixed color which is not responded by the thermochromic microcapsules is displayed at low temperature; as the temperature rises, the thermochromic microcapsules change color in sequence from low to high according to the melting point of the thermal reaction carrier, so that clear switching of the color along with the temperature change is realized, and the requirement of multi-section temperature indication is accurately met; and multiple color gamuts can be flexibly allocated, diversified color requirements are met, and the application boundary is greatly widened.

The invention provides a thermochromic photo-thermal regulation and control intelligent window film and a preparation method thereof, and belongs to the technical field of intelligent devices. The invention provides a thermochromic photo-thermal regulation and control intelligent window film. The thermochromic photo-thermal regulation and control intelligent window film is prepared from the following raw materials through photo-curing: butyl acrylate, ionic liquid, a cross-linking agent and a photoinitiator. According to the thermochromic photo-thermal regulation and control intelligent window film, the ionic liquid and a polymer network are designed, the durability is extremely high, the hydrophobic characteristic is achieved, the thermochromic photo-thermal regulation and control intelligent window film can normally work in extreme weather such as low temperature and high temperature, and the application requirements of different temperature environments are met; meanwhile, the thermochromism photo-thermal regulation and control intelligent window film has thermochromism performance and is transparent at low temperature and capable of blocking light from passing at high temperature, and energy consumption of a building is effectively reduced.

The application provides a thermochromic multi-color-changing nanofiber membrane temperature sensor and a preparation method thereof. A thermochromic powder is fully mixed with a TPU polymer to prepare a spinning solution, and a nanofiber membrane with a thermochromic function is prepared by an electrostatic spinning method, and then the nanofiber membrane is packaged by using PDMS to obtain a thermochromic nanofiber membrane temperature sensor with a temperature indicating function. The application also prepares a thermochromic multi-color-changing nanofiber membrane temperature sensor capable of changing multiple colors with temperature changes by using a two-step electrostatic spinning and re-packaging process, and the color change has no limitation of color system and color span, thereby solving the problem that the application range of the thermochromic material is restricted due to the limited color changing range of the thermochromic material itself, that is, when the color changes, it is usually in a relatively narrow range of similar color tones or similar colors.

A solder preform in the shape of a solder tube or washer includes: a cylindrically shaped solder alloy body including an inner surface, an outer surface, a first end, and a second end, the second end interlocking with the first end, and the first end and the second end cut along an entire height of the cylindrically shaped solder alloy body; and a flux core embedded in the cylindrically shaped solder alloy body between the inner surface and the outer surface, the flux core including a thermochromic indicator. During reflow soldering, the flux core including the thermochromic indicator is configured to flow out of the first end and the second end to coat a substrate that is soldered.

The invention provides a reversible thermochromic insulating material for thermal sensing of electrical equipment and a preparation method thereof, the insulating material comprises the following raw materials by weight: 19.2 to 25.6 parts of a core material emulsion, 6.2 to 8.8 parts of thermosensitive microcapsule powder, 173.8 to 186.2 parts of a base material, 92 to 108 parts of an auxiliary additive, and 4.5 to 6.2 parts of an emulsifier; the core material emulsion comprises the following components in parts by weight of the total components of the insulating material: 0.3-0.4 part of a composite color former, 18-24 parts of modified octadecanol and 0.9-1.2 parts of bisphenol A, and the modified octadecanol contains silicon-oxygen bonds. The core material emulsion is a core basis for realizing a thermochromic function and provides color change capability responding to temperature for the material, and the thermosensitive microcapsule powder plays roles in protecting the core material and maintaining thermochromic stability, ensures that the core material normally plays a role in a complex environment, assists the base material to enhance insulativity and mechanical support, and improves the thermochromic performance of the material. All the components are matched to guarantee stable exertion of the thermochromic function in nuclear power equipment.

The present disclosure relates to a composition for preparing a thermochromic solid marker, which enables the production of a color development means for a thermochromic writing instrument capable of being erased in response to a change in temperature in the form of a solid marker having desirable physical properties, and a preparation method for a thermochromic solid marker using the same. The composition for preparing a thermochromic solid marker comprises: 10 to 35 wt. % of microcapsule particles comprising a core composition containing a leuco dye and a developer, and a polymer resin shell surrounding the core composition; 5 to 20 wt. % of a gelling agent; 30 to 60 wt. % of water; and 0 to 10 wt. % of a glycol-based organic solvent.

A readily findable dental appliance is provided having a shell with a plurality of tooth-receiving cavities shaped to receive and resiliently reposition teeth in a patient's mouth from a first arrangement toward a. second arrangement. At least one thermally-sensitive indicator is incorporated with at least a portion of the shell. The thermally-sensitive indicator includes a first temperature-activated thermochromic pigment, which preferably changes from a. first visible color when below a first temperature to a second substantially clear color when above the first temperature. The pigment preferably includes a leuco dye microencapsulated in a polymer such as melamine formaldehyde polymer. A second temperature-activated, thermochromic pigment may be provided, that changes from a. third substantially clear color when above a second temperature to a fourth visible color when below the second temperature, which is, e.g., approximately beverage-drinking temperature.

The invention belongs to the technical field of information encryption, and provides a preparation method of a curved-surface multi-layer encryption device integrating thermochromism and infrared thermal imaging, different encryption function layers are stacked on a curved surface and integrated into a curved-surface multi-layer information encryption device in a three-dimensional space, the information storage capacity can be effectively improved without increasing the size of the device, and the cost is reduced. High information density, high function density and multi-level information encryption are realized, and higher-level information security is provided; the self-heating conductive layer is integrated inside, compared with a mode of achieving a thermal stimulation effect through external environment heating, the self-heating conductive layer needs smaller power, energy loss is greatly reduced, the heat conduction efficiency is higher, and the efficiency problem of information encryption and decryption caused by heat conduction delay is effectively solved; meanwhile, the supporting framework is preferentially formed, and the laser in-situ curing technology is combined, so that compared with extrusion type and spraying type curved surface film preparation technologies, the method has the advantages that the dielectric solution is prevented from sliding on the curved surface substrate, and the problem that the curved surface dielectric film is manufactured unevenly is effectively solved.

Provided is a cover for an inductive heating cooker including a top plate provided with at least one crater, on which a cooking container is placed, and a working coil arranged on one side of each of the at least one crater of the top plate to inductively heat the cooking container. The cover includes a cover body interposed between the at least one crater of the top plate of the inductive heating cooker and the cooking container, and a high-temperature display part including a thermochromic layer made of thermochromic material and arranged on one side of the cover body, the thermochromic layer changing a color thereof to a first color below a predetermined temperature and to a second color, different from the first color, at at least the predetermined temperature.

The invention relates to the technical field of fire hoses, in particular to a method and equipment for identifying the damage degree of a fire hose and a medium. The method comprises the following steps: S100, acquiring a surface image of a fire hose; s200, obtaining the mapping temperature of a preset feature pixel point in the surface image of the fire hose according to a preset mapping relation between the color and the temperature corresponding to the fire hose; s300, obtaining a corresponding relation between the mapping temperature and the temperature difference value according to the mapping temperature of the preset feature pixel point and the actual temperature; the temperature difference value is the difference value between the actual temperature and the mapping temperature; s400, obtaining the actual temperature corresponding to each pixel point in the surface image of the fire hose according to the corresponding relation between the mapping temperature and the temperature difference value; and S500, determining the damage degree of the fire hose according to the actual temperature corresponding to each pixel point in the surface image of the fire hose. According to the invention, detection of the damage degree of the thermochromic fire hose in a fire application scene is realized.

The invention relates to the technical field of fire hoses, in particular to a thermochromic visual fire hose and system. The thermochromic visual fire hose comprises a lining layer which forms a pipeline of the fire hose and is used for conveying a fire extinguishing medium; the reinforcing layer is positioned outside the lining layer and is used for improving the strength and compression resistance of the thermochromic visual fire hose; the thermochromic coating is uniformly coated on the surface of the enhancement layer and is made of at least one thermochromic material, and the thermochromic material can generate reversible color change within a preset temperature range; the outer protection layer covers the outer part of the thermochromic coating and is used for protecting the thermochromic coating; and the outer protection layer is made of a transparent material. The problem that whether the internal structure of a traditional fire hose is heated and damaged or not cannot be judged visually can be solved.