86 results about "Thermochromism" patented technology

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 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.

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.

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 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 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.

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 application belongs to the technical field of building facades, and particularly relates to a color-changing glass, a manufacturing method thereof and a color-changing building facade. The color-changing glass comprises a transparent packaging shell and a thermochromic material, and the thermochromic material is located inside the transparent packaging shell. The thermochromic material is a colloid composed of hydroxypropyl cellulose and sodium chloride as solutes and distilled water as a solvent. The application can automatically change the color and transparency of the glass according to temperature changes, and reduce the sunlight directly entering the room in summer.

The invention belongs to the technical field of building facades, and particularly relates to a design method of building facade photochromic glass. The design method comprises the steps that the photochromic glass comprises a transparent packaging shell and a thermochromic material, and the thermochromic material is located in the transparent packaging shell; the thermochromic material is a colloid formed by 6wt% of hydroxy propyl cellulose, sodium chloride and distilled water; designing the photochromic glass based on the sodium chloride concentration within the range of 0-2%: calculating the sodium chloride concentration in the thermochromic material according to the first color change temperature; calculating the height upper limit of the photochromic glass when the total potential energy of the thermochromic material is above a stable potential energy threshold value based on the sodium chloride concentration; the height of the photochromic glass does not exceed the height upper limit. The reversible and uniform photochromic glass capable of automatically and stably changing the transparency according to the temperature can be designed, and indoor light in summer can be stably regulated and controlled.

The utility model discloses a paper shredder with a temperature display function, which comprises a paper shredder body, a main motor is arranged in the paper shredder body, and a thermochromic developing component is arranged on the paper shredder body at the position of the main motor so as to display the temperature change state of the main motor in real time. Compared with the prior art, the thermochromic developing assembly is arranged at the position, located on the main motor, of the paper shredder main machine, so that the temperature change state of the main motor is displayed in real time, a user can judge the temperature change of the main machine more visually according to the color of the developing assembly, and the use experience feeling of the user is improved.

The invention belongs to the technical field of thermochromic films, and discloses a TiO2 / Mn-VO2 / SiO2 composite film and a preparation method and application thereof.The TiO2 / Mn-VO2 / SiO2 composite film sequentially comprises a buffer layer, a first functional layer and a second functional layer; wherein the buffer layer is formed by SiO2; the first functional layer is formed by a first material, the first material is obtained by doping VO2 with Mn, and the doping amount of Mn is 0.8 at.%-1.2 at.%; the second functional layer is formed of TiO2. The TiO2 / Mn-VO2 / SiO2 composite film structure is constructed, and by virtue of the synergistic effect of Mn doping, the SiO2 buffer layer and the TiO2 functional layer, the phase change temperature of the thermochromic material is effectively reduced to adapt to daily use scenes, and meanwhile, excellent visible light transmittance and solar irradiation regulation efficiency are comprehensively guaranteed; and the practical functions of interface adhesion, structural stability, self-cleaning and the like of the film are remarkably improved, and comprehensive optimization of core performance and use characteristics is realized.

The invention discloses a composite thermochromic film as well as preparation and application thereof. The composite thermochromic film is prepared from tungsten-doped vanadium dioxide, polyvinyl alcohol and paraffin. The film can be tightly adhered to an adhesion surface, and has a function of adjusting the transmissivity of visible light and near-infrared light.

The invention relates to a thermal response multistage reversible color-changing pearlescent pigment and a preparation method thereof, and belongs to the technical field of functional color-changing materials. The pigment is based on a temperature zone response programmable control principle, three thermochromic dyes are adopted to correspond to color change temperature zones of 20 DEG C, 35 DEG C and 50 DEG C respectively, the color change process is sequentially carried out according to a set sequence by regulating and controlling the type and the wall thickness of a coating material of a microcapsule, and a staged and reversible dynamic color change system is constructed. The color-changing dye is coated with chitosan, gelatin or a cross-linked substance thereof, and has good biodegradability. The microcapsule is loaded on the surface of the pearlescent master batch and further coats the inorganic reflection shell to form a core-shell type three-layer structure, so that the color stability and the light interference effect are enhanced. The multi-temperature-zone color changing sequence is accurately controlled, the optical performance is enhanced, the environmental protection performance of the material is improved, and the method is suitable for application scenes of anti-counterfeit labels, temperature sensing indication materials and degradable packages.

The preparation method comprises the following steps: S1, preparing a water-oil mixed emulsion: melting octadecanol, adding a color former and a color developing agent BPA, and heating to 80 DEG C so that the octadecanol and the color developing agent BPA are completely dissolved with each other to obtain an oil phase; adding Arabic gum GA into water to form a 5% aqueous solution; slowly pouring the water phase into the oil phase to form an oil-in-water emulsion; s2, wall material wrapping; and S3, product purification to obtain the ternary color-changing microcapsule. The thermochromic material can rapidly change color at high temperature and has obvious difference, the overheating condition can be visually recognized without professional interpretation and training, the response speed is high, the response is visual, and therefore the training cost of technicians is low.

The invention discloses a metal organosilane thermochromic coating as well as a preparation method and application thereof, and belongs to the technical field of organosilicone and thermochromism. According to the technical scheme, room-temperature vulcanized methyl silicone rubber, imidazole silane and a cross-linking agent are stirred and mixed to be uniform, a cobalt ion alcoholic solution is added for stirring and mixing, then a catalyst is added for uniform mixing, curing is conducted at the room temperature, and the metal organosilane thermochromic coating is obtained. The cobalt ions and the imidazole silane are mixed in a liquid phase to prepare the coating, different color changing effects are generated due to the fact that the coordination state of the cobalt ions and the imidazole silane is influenced by temperature changes, reversible thermochromism can be achieved at the temperature of 40-60 DEG C, and color changing response is rapid. A full-liquid preparation and mixing mode is adopted, a thermochromic material does not need to be additionally prepared and added, and the preparation method is simple, convenient and efficient.

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 relates to the technical field of intelligent response materials, in particular to a reversible color-changing pearly-luster thin film material and a preparation method thereof.The thin film material is formed by laminating a bottom layer, a middle layer and a top layer in a cholesteric liquid crystal polymer network layer, the bottom layer contains a right-handed chiral dopant and a functional nano mica sheet, and the basic structure characteristics are given; a photoresponse chiral switch, a thermochromic microcapsule and a conductive nano filler are introduced into the middle layer, so that multiple response functions of light, heat and electricity are realized; the top layer contains a levorotatory chiral dopant, an ultraviolet absorbent and a light stabilizer and provides environmental protection and stability, a structural color is generated through a spiral superstructure formed by molecular self-assembly, and a color changing mechanism is based on continuous change of molecular orientation and screw pitch.

The invention relates to a heat collecting wall and a design method thereof. The heat collecting wall comprises a gravity assisted heat pipe and a heat collecting pipe, wherein the gravity assisted heat pipe is arranged on a building wall body; the thermochromic coatings are arranged on the evaporation sections of the gravity heat pipes, and in a set temperature interval, the emissivity of the thermochromic coatings is inversely proportional to the surface temperature of the thermochromic coatings; the evaporation section of the gravity heat pipe is covered with the glass cover plate, the glass cover plate comprises a power generation layer and a color changing layer, the color changing layer and the power generation layer are arranged in a stacked mode, and at least one of the color changing layer and the power generation layer is made of glass.