58results about How to "Adjustable phase change temperature" patented technology

The invention relates to a setting phase change energy storage material with high-thermal conductivity and a preparation method thereof, belonging to the field of phase change heat storage materials. The setting phase change energy storage material with high-thermal conductivity is characterized by containing 65-90 percent by mass of paraffin substances as a phase-change material, 9-34 percent by mass of high-density polyethylene as a support material and 1-7 percent by mass of expanded graphite as a heat conduction intensifier; a method for adding a proper amount of expanded graphite to paraffin/high-density polyethylene in a molten state is adopted to enable the heat conductivity of the setting phase change material to be increased to 1.35W/(m.K) or higher. The method comprises the following steps of: heating to melt the paraffin substances with the mass percent of 65-90 percent, and heating to enable the temperature of the liquid paraffin to reach 120-190 DEG C; adding high-density polyethylene with the mass percent of 9-34 percent and the expanded graphite with the mass percent of 1-7 percent to the liquid paraffin, and then melting and evenly stirring in vacuum; putting the mixture in a hot mould for pressing and molding; taking the mixture from the mould after naturally cooling. The setting phase change material has high thermal conductivity, does not need to be packaged in containers and can directly contact heat-transfer media.

The invention discloses an anti-ferroelectric membrane with adjustable working temperature area and large heat-releasing rate, and the method for preparing the same and its application. It applies sol-gel method to prepare said anti-Ferroelectric membrane ((Pb, La or Nb) (Zr, Sn, Ti) O3, the solute of precursor comprises acetate lead, the acetate lanthanum or ethanol nb, acetate tin, zirconium iso-propoxide and titanium iso-propoxide; the solvent comprises acetic acid, glycol ethylene ether and water; the final concentration of precursor is controlled between 0.2-0.4 M. the bed piece is LaNiO3/Pt/Ti/SiO2/Si and Pt/Ti/SiO2/Si. The product is mainly used for infrared heat-releasing electrical detector, smart device and system.

The invention relates to an organic phase stabilization, phase transition and energy storage material and a preparation method thereof. The organic phase stabilization, phase transition and energy storage material comprises 30-90wt% of an organic solid-liquid phase transition and energy storage material and 10-70wt% of an organic polymeric phase stabilization and phase transition supporting material. The organic solid-liquid phase transition and energy storage material is introduced into the polymeric phase stabilization and phase transition supporting material in order to make the organic phase stabilization, phase transition and energy storage material have good energy storage performance, adjustable phase transition temperature and high phase transition enthalpy; and when B in the polymeric phase stabilization and phase transition supporting material is an azo structure, anthraquinone, naphthalene amide and pyrene amide, the organic phase stabilization, phase transition and energy storage material can absorb visible light, and realizes photo-thermal transition and storage. The organic phase stabilization, phase transition and energy storage material has the advantages of simple synthesis process, convenient application, and wide application prospect.

The invention discloses a building phase-change heat storage material used as light aggregate, which solves the problems of difficulty in storage, high leakage tendency in use, and difficulty in actual construction in the phase-change material which is used in building materials at present. The phase-change heat storage material serving as an aggregate has adjustable phase-change temperature points. The particle diameter is 1.6-20mm, the phase-change latent heat is 10-100 J/g, the cylindrical compressive strength is 2.5-10.0 MPa, and the 80-DEG C cold/heat circulation loss rate is almost zero. The heat storage material is applicable to mortar, concrete or masonry structures with requirements for the heat storage function. The building phase-change heat storage composite material is composed of an adsorbing material, a phase-change material and a packaging material. The adsorbing material adsorbs a certain proportion of the phase-change material with the phase-change temperature of 15-32 DEG C, and then is packaged by the packaging material. The building phase-change heat storage composite material has the advantages of favorable sealability, controllable phase-change temperature and higher strength, and can solve the problems of difficulty in storage, low stability, poor formability and the like in the existing phase-change material.

The invention relates to a mobile heat storage vehicle based on phase-change materials. The mobile heat storage vehicle comprises a transport device, a heat storage device and a control system, wherein the heat storage device is fixed to the transport device in an operating mode, and the control system can display in time or monitor in time the situation selected from the flow rate, temperature, pressure, heat storage capacity, GPS positioning, travel speed and / or operating mileage; and the heat storage device comprises a housing, heat conduction phase-change materials and a heat exchange device, wherein the heat conduction phase-change materials and the heat exchange device are filled in the housing. The mobile heat storage vehicle is filled with a large amount of high performance phase-change materials to serve as heat storage mediums, the heat storage mediums, belongs to heat transfer between heat source ends and client ends rather than the transfer with no medium, and is obviously superior to the heat storage performance of the mobile heat storage vehicle which uses water mediums of the hot source ends or is filled with a small amount of phase-change materials; the control system can realize real-time monitoring and background monitoring; and the heat storage device can further comprise a heated fluid pipeline independent of a heating fluid pipeline, the waste heat recovery for non-clean high temperature flow is achieved, and using of lone time does not produce pollutions such as water pipes.

The invention discloses an antiferroelectric film with adjustable working temperature zone and higher pyroelectric coefficient and a preparation method and application thereof. The antiferroelectric film (Pb,Nb)(Zr,Sn,Ti)O3 taken as the pyroelectric material is prepared by a sol gel method, the solute of precursor solution can be lead acetate, lanthanum acetate or niobium ethoxide, stannic acetate, zirconium isopropoxide and titanium isopropoxide, the solvent includes glacial acetic acid, ethylene glycol ethyl ether, acetylacetone and water, the final concentration of the precursor solution is controlled between 0.2-0.4 M, and the substrate comprises LaNiO3/Pt/Ti/SiO2/Si and Pt/Ti/SiO2/Si. The antiferroelectric film is high in thermally stimulated current and adjustable in temperature andcan be used for a pyroelectric infrared detector, a smart device and a system.

The invention relates to a phase change energy storage microcapsule taking polyurethane modified organic silicon resin as a shell material and a preparation method of the phase change energy storage microcapsule, and particularly discloses the preparation method which comprises the following steps: (1) uniformly mixing monomers for generating organic silicon resin, adding a catalyst, and prepolymerizing to obtain a prepolymer of polysiloxane; (2) adding the polyurethane prepolymer into the step (1), and carrying out a reaction to obtain a polyurethane modified organic silicon resin prepolymer;(3) uniformly mixing a core material with the shell material prepolymer to obtain a core material and shell material prepolymer mixture; (4) preparing an aqueous solution of a surfactant; and (5) mixing and emulsifying the core material and shell material prepolymer mixture and the aqueous solution of the surfactant to obtain an emulsion, adding a catalyst until the reaction is finished, separating, and drying to obtain the polyurethane modified organic silicon resin shell phase change energy storage microcapsule. The method is green, pollution-free and simple to operate, and the obtained microcapsule is smooth in surface, good in compactness, adjustable in phase change temperature, controllable in particle size, good in heat resistance and high in phase change enthalpy value.

The invention relates to a vanadium dioxide doped powder, and a film and a preparation method thereof. The chemical composition of the vanadium dioxide doped powder is V[1-x]M[x]O[2], x is greater than 0 and not greater than 0.5, M is a doped element, and the doped element is Mg or Al, and can be used for improving the optical performances of the vanadium dioxide doped powder and adjusting the phase transition temperature of the vanadium dioxide doped powder.

The invention relates to a heat reservoir based on a phase-change material and a movable heat storage device provided with the heat reservoir. The heat reservoir comprises a shell, a heat-conducting phase-change material charged into the shell and a heat exchanger. The heat exchanger is located in the shell and comprises a heating fluid pipeline. The invention further relates to the movable storage device comprising the heat reservoir and a transporting unit. A large amount of the high-performance phase-change material is charged in the heat reservoir and serves as a heat storage medium, heat transmission, instead of medium transmission, between a heat source side and a client side is achieved, and the heat storage performance is remarkably superior to that of a movable heat storage device with water at the heat source side serving as the medium or a movable heat storage device filled with a small amount of the phase-change material; the heat reservoir further comprises a heated fluid pipeline independent of the heating fluid pipeline, and the heated fluid pipeline can be used for waste heat recovery of unclean high-temperature flow without pollution to such as a tap water pipeline after long-term use; and a selectable control system provided by the invention can achieve real-time monitoring and background monitoring.

The invention provides a HoCu[2-x]Nix series magnetic cool storage material for a cryo refrigerator. The magnetic cool storage material has larger volumetric specific heat in 10-40K temperature area, has larger width of specific heat peak, and can substitute for Pb to be used as the cool storage material for 10-40K temperature area. The HoCu[2-x]Nix series magnetic cool storage material has the outstanding characteristics that the position and the specific heat peak value can be regulated by controlling the content of Ni, when the additive proportion x of Ni is equal to 0.4, the material has specific heat peak at 20.2K, and the specific heat peak value is 0.95J/cm<3>K. According to the HoCu[2-x]Nix series magnetic cool storage material, the cast ingot can be directly manufactured into particle materials for use by a mechanical crushing method, or can be manufactured into spherical particle materials for use by a melt atomization method or a rotation electrode method, and 0.154-0.30mm spherical particle is in the best use form.

The invention relates to a low-temperature phase change energy storage material, particularly an energy storage material comprising CaCl2.6H2O and a preparation method therefor. The energy storage material is shinyleaf yellowhorn shell loaded salt hydrate CaCl2.6H2O which is prepared by mixing shinyleaf yellowhorn shells with salt hydrate, wherein CaCl2.6H2O exists in the shinyleaf yellowhorn shells in form of dispersed minute particles. The energy storage material provided by the invention has the advantages that the CaCl2.6H2O energy storage material has the characteristics of regulated phase change temperature, high thermal cycling stability, low degree of supercooling and the like, is good in chemical stability, non-toxic, green, environmental-friendly, safe, incombustible and great in density, and the cost of the container is lowered. Moreover, the preparation method is simple.

The invention provides a flexible-elastic shape-stabilized temperature-controlled multifunctional phase-change material and a preparation method thereof. The flexible-elastic shape-stabilized temperature-controlled multifunctional phase-change material comprises the following raw materials in percentage by mass: 75-85% of paraffin alkane phase-change material, 12-20% of olefin block copolymer, 2-8% of hydrogenated styrene butadiene block copolymer and 0.5-1% of cross-linking agent. The material is excellent in soft and elastic shaping effect, high in energy storage density and good in temperature control effect, and the phase change temperature within 18-65 DEG C is adjustable. The invention also provides a preparation method of the flexible-elastic shape-stabilized temperature-controlledmultifunctional phase-change material. The preparation method is wide in raw material source, low in cost, simple, environmentally friendly, safe and non-toxic, and the problems that in the prior art,the preparation process is complex, mass production is difficult, and the obtained material is limited in performance are effectively solved.

The invention relates to a vanadium dioxide doped powder, and a film and a preparation method thereof. The chemical composition of the vanadium dioxide doped powder is VO[1-x]M[x], x is greater than 0 and not greater than 0.5, M is a doped element, and the doped element is F, S, Cl, Br or I, and can be used for improving the morphology, the phase transition temperature, the electric performances and the optical performances of the vanadium dioxide doped powder.

The invention relates to a friction-spun phase-change antistatic composite yarn and a preparation method thereof. The method comprises the following steps of 1, sequentially impregnating a polyester yarn in a mixture of polyethylene glycol (PEG) and carbon nanotubes, and a polyvinyl butyral (PVB) solution to obtain a polyester-PEG-carbon nanotube-PVB composite yarn; and 2, taking the polyester-PEG-carbon nanotube-PVB composite yarn as a core yarn and common synthetic fibers as wrapping fibers, and performing friction spinning to prepare the polyester-PEG-carbon nanotube-PVB-synthetic fiber composite yarn. The composite yarn has the advantages that 1, the composite yarn is high in phase change enthalpy value, good in heat storage effect, high in heat transfer efficiency and good in antistatic property; 2, the preparation method is simple, economical and rapid; 3, the service life is long, and the thermal cycle performance is stable; 4, the phase change temperature is adjustable; and 5,the raw material applicability is good, and the problem that a core yarn is difficult to prepare by ring spinning after non-uniform PEG sizing can be solved.

The invention discloses a carbon fiber-added microcapsule shape-stabilized phase-change material and a preparation method thereof. The carbon fiber-added microcapsule shape-stabilized phase-change material comprises the following components in parts by weight: 50 to 100 parts of a core material, 200 to 500 parts of chloroform, 0.2 to 0.6 part of an emulsifying agent, 15 to 30 parts of toluene diisocynate, 6 to 15 parts of ethidene diamine and 0 to 100 parts of distilled water, wherein the core material comprises paraffin, polyethylene and carbon fiber powder, and the weight ratio of the paraffin to the polyethylene to the carbon fiber powder is (30-70):(20-50):(5-15). The microcapsule shape-stabilized phase-change material provided by the invention adopts the polyethylene and the carbon fiber as composite supporting materials, the mechanical strength of the microcapsules is greatly enhanced, the microcapsules are not broken when 10-Kg pressure is applied, and the microcapsule shape-stabilized phase-change material can be widely applied to various aspects in the field of buildings and in the fields of military, civil use, household appliances and the like. The carbon fiber-added microcapsule shape-stabilized phase-change material is wrapped by an interface polymerization method, loss of the paraffin can be retarded or stopped, heat storage and release functions of the phase-change material are guaranteed, the service life of the phase-change material is prolonged (after heat storage and release is conducted for 50 times, attenuation is zero), and the carbon fiber-added microcapsule shape-stabilized phase-change material can adapt to more use environments.

The invention relates to phase change energy storage material manufacturing method field. The method includes the following steps: preparing proper mixture; keeping it at 80-100 centigrade degree for 1-4 hours; shaking for 1-5 minutes with 40-50 kHz ultrasonic; controlling the temperature at 50-80 centigrade degree; and testing the phase change temperature and heat. The formed material has adjustable phase change temperature and high phase change heat.

The invention discloses phase-change energy storage ceramsite and a preparation method thereof, relating to the technical field of phase-change energy storage materials. The phase-change energy storage ceramsite contains the following raw materials in parts by weight: 50-70 parts of diatom plate polishing waste, 3-5 parts of quick lime, 20-50 parts of gel materials, 20-30 parts of solid-liquid organic phase-change energy storage materials and 15-40 parts of water. The preparation method comprises the steps of mixing the raw materials in a formula ratio, and carrying out granulation and room-temperature maintenance, so as to obtain the ceramsite. According to the phase-change energy storage ceramsite, the diatom plate polishing waste and the quick lime are taken as the raw materials, the solid-liquid organic phase-change energy storage materials are taken as an energy storage material, the raw materials and the energy storage material are matched with the gel materials so as to generatethe light and high-strength phase-change energy storage ceramsite, so that the application defect of fusion leakage of an organic phase-change material is remedied by virtue of the microstructure advantages and relatively high adsorption capacity of diatom plate polishing powder, and the high-added value functional utilization of the diatom plate polishing waste is realized. By utilizing fire-free and steam-free manners, the pretreatment of the raw materials is omitted, so that the preparation method has the advantages of simple preparation process, low cost, energy saving and environmental protection and the like.

The invention provides a composite phase change and energy storage material as well as a preparation method thereof. The composite phase change and energy storage material comprises the following components in percentage by weight: 50 to 95 percent of sodium acetate trihydrate, 4 to 50 percent of regulator, 0.1 to 5 percent of thickening agent and 0.1 to 5 percent of nucleating agent, wherein theabove components are solid materials. The composite phase change and energy storage material can reduce the supercooling phenomenon, avoid phase separation, increase recycling times and prolong service life, and also can adjust a phase change point and enlarge application range.

The invention provides a multi-ferric composite material having both magnetic refrigeration effect, electrically-controlled magnetic effect and magnetic memory effect nearby the room temperature, anda preparation method and application thereof. The multi-ferric composite material comprises a ferroelectric PMN-PT monocrystalline substrate, and a La-Fe-Co-Si ferromagnetic alloy layer with giant magneto-caloric effect, wherein metal electrodes are evaporated on two surfaces of the PMN-PT monocrystalline substrate, and two surfaces are adhered with the La-Fe-Co-Si ferromagnetic alloy layer through adhesive so as to form the multi-ferric composite material. The advantage of the multi-ferric composite material is that the considerable electrically controlled magnetic effect is provided nearby the room temperature, and the magnetic memory effect induced by the pulse voltage is represented. And meanwhile, since the ferromagnetic layer of the structure has giant magneto-caloric effect, a new model for overcoming the heating of the storage unit by using the magnetic refrigeration is provided. The multi-ferric composite material provided by the invention has important and actual significancefor developing a novel multifunctional composite device having both the magnetic refrigeration effect and the magnetic memory effect.