8337results about "Heat-exchange elements" patented technology

The invention relates to an AI-driven intelligent design and preparation method of an inorganic hydrated salt phase change material, and solves the problem that the traditional technology is mainly based on experience trial and error and single performance optimization and cannot give consideration to multi-performance balance and multi-scene efficient adaptation development requirements of the inorganic hydrated salt phase change material. The method comprises the following steps: acquiring multi-dimensional performance requirements (including phase change temperature, latent heat value and the like) of a material, generating a candidate formula and a prediction result by using a trained Gaussian process regression model, and performing multi-objective optimization to screen out a Pareto optimal formula; and carrying out experimental verification and calculating deviation, retraining the model by complementary data exceeding a threshold value, and determining a final formula after reaching the standard so as to be matched with continuous process large-scale preparation. The method has the advantages that the AI replaces experience trial and error, multi-performance cooperation of materials is achieved, the research and development period is greatly shortened, the cost is reduced, and the method is suitable for multiple energy storage scenes.

The invention relates to the technical field of low-dielectric heat-conducting functional materials, in particular to a nano silicone rubber composite material as well as a preparation method and application thereof. According to the preparation method, a modified vinyl silsesquioxane coupling agent is taken as a bridge, and boron nitride nanosheets, silicon carbide nanowires and the modified vinyl silsesquioxane coupling agent are covalently connected through hydrolysis reaction, so that a heterostructure is constructed, and the nano heat-conducting filler is obtained; the preparation method comprises the following steps: dispersing a nano heat-conducting filler in vinyl silicone oil, and constructing a covalent cross-linked network through addition cross-linking reaction and curing treatment to obtain the nano composite silicone rubber material. According to the processing method, the filling amount, the dielectric constant and the dielectric loss can be reduced, meanwhile, the heat conduction capacity is improved, and the problems that in the prior art, the dielectric constant and the dielectric loss are low due to simple mixing of the boron nitride nanosheets and the silicon carbide nanowires are solved.

The invention relates to a composite phase-change film based on liquid metal and PBO fiber and a preparation method thereof, and belongs to the technical field of phase-change material preparation, and the preparation method comprises the following steps: the composite phase-change film comprises a poly (p-phenylbenzobisoxazole) fiber (PBO) base material, a phase-change material and a heat-conducting filler, the phase-change material is composed of phase-change microcapsules (PM) which are prepared by taking polyurethane (PU) as a wall material and organic solid-liquid phase-change materials (OPCMs) as a core material through a Pickering emulsion polymerization method. The prepared PM has a core-shell structure, and leakage of OPCMs is effectively prevented. The PM and the PBO fiber network are combined, so that the dual packaging of the OPCMs is realized, and the leakage of the OPCMs is further prevented. Meanwhile, dispersion and interaction of the OPCMs in a PBO matrix are optimized, and formation of a network structure with a limited domain is promoted. The composite phase change film prepared by the invention has relatively high mechanical properties, remarkable heat conductivity, excellent and stable flexibility and excellent heat storage capacity.

The present invention pertains to the technical field of phase-change temperature-reducing materials, and in particular, relates to a phase-change temperature-reducing polyurethane composite material, and a preparation method and application thereof, comprising the following parts by mass of raw materials: 50-80 parts of polyurethane material A+polyurethane material B, 1-3 parts of flake graphite powder with a particle size of 850-1200 meshes, 0.8-1.8 parts of vermicular graphite with a particle size of 10-40 meshes, 10-30 parts of phase-change paraffin, 1-3 parts of activated carbon, 0.5-2 parts of catalyst, and 0.2-1 parts of co-catalyst. The polyurethane composite material made in the present invention is rapid in phase-change temperature reduction, high in heat absorption and dispersion, and free of problems of phase-change paraffin leakage, crystallization, and frosting on the surface thereof. At the same time, it also has softness and high elasticity, and can be widely applied to objects in contact with human bodies. A temperature difference is formed by reducing the temperature of the surface in contact with skin, which can bring a comfortable sense of coolness and a temperature-reducing effect to consumers.

A viscosity reduction system includes: a dispenser including: an inlet configured to receive a fluid; an outlet configured to dispense the fluid onto a surface; and a flow channel that fluidly connects the inlet with the outlet; and a vibrating device that directly contacts the dispenser at one or more locations and that is configured to vibrate the dispenser and the fluid when power is applied to the vibrating device.

The embodiment of the invention provides a liquid cooling working medium, the liquid cooling working medium is used for carrying out immersed liquid cooling heat dissipation on electronic equipment, and the liquid cooling working medium comprises the following components in parts by mass: 94-100 parts of fluorinated liquid, 0-5 parts of heat-conducting powder and 0-1 part of a stabilizer, the heat-conducting powder is heat-conducting powder treated by a surface treating agent, and the surface treating agent is a fluorine-containing silane coupling agent; the heat-conducting powder with a certain proportion content is added into the liquid cooling working medium with the base liquid being the fluorinated liquid, so that the heat-conducting property of the prepared liquid cooling working medium is superior to that of a common product.

The invention discloses a preparation method of a flexible material with double functions of radiation refrigeration and photothermal conversion storage, and relates to the field of composite phase change materials. The preparation method comprises the following steps: 1) preparing the flexible phase change material matrix by utilizing n-octadecane, SEBS and POE through hot pressing; 2) preparing a BaSO4 solution by using absolute ethyl alcohol, deionized water, a water-based defoaming agent, a water-based dispersing agent and an acrylic resin emulsion; (3) preparing an MXene solution; and 4) spraying the BaSO4 solution on the surface of one side of the flexible composite phase change material matrix by using a spray gun, and spraying the MXene solution on the surface of the other side of the flexible composite phase change material matrix to obtain the flexible composite phase change material. The radiation refrigeration layer can strongly reflect visible light and near-infrared light, has high emissivity in an infrared light area, especially in an atmospheric window wave band, reduces absorbed atmospheric heat radiation, reduces urban heat island effect caused by dense building groups in cities, and can effectively solve the problems of large day and night temperature difference and heat supply and demand in summer and winter.

The invention belongs to the technical field of application of brake materials for brake pads, and particularly discloses a friction material for a phase change heat storage composite brake pad, which comprises Cu powder, Cr powder, V powder, CuAlMn particles, graphene powder and graphite powder in a mass ratio of (40-60): (10-25): (0.1-1.5): (10-30): (0.5-1.5): (4-6). The friction material for the brake pad has the beneficial effects that the prepared friction material for the brake pad is low in friction coefficient, good in wear resistance and good in heat fading resistance, and the service life is prolonged; cu is used as a matrix, and Cr and V are used as reinforced matrix components, so that the material plays an important role in the overall strength and wear resistance of the material for the brake pad; the CuAlMn particles are adopted, so that unstable friction coefficient and brake failure caused by over-high temperature of the friction material for the brake pad under the high-temperature condition are effectively relieved; graphene and graphite are used as lubricating materials, so that the friction coefficient is effectively reduced and stabilized, and the thermal stability is improved.

The invention belongs to the technical field of seawater desalination, and particularly relates to a solar efficient photo-thermal conversion type floating ball and seawater evaporation application thereof. Specifically, the solar efficient photo-thermal conversion type floating ball comprises a spherical inner core and a photo-thermal conversion material wrapping the spherical inner core, and the density of the spherical inner core is 25-500 kg / m < 3 >; wherein the photo-thermal conversion material is coated at least twice. According to the solar efficient photo-thermal conversion type floating ball, the photo-thermal conversion material is coated at least twice, the loading capacity is improved, meanwhile, a porous network structure is formed, and the seawater evaporation rate can be increased; sunlight irradiates on the floating ball, light energy is converted into heat energy under the action of the surface photo-thermal conversion material, salt is deposited on the floating ball along with water evaporation, and surface salt deposition is automatically and dynamically removed through the free rotating motion of the floating ball on the water surface under the action of centrifugal force and water flow scouring. And self-recovery of the evaporation process and continuous seawater evaporation are realized.

The invention discloses a preparation method of a high-dispersion and high-thermal-conductivity filler based on carbon black, and relates to the technical field of carbon black modification, and the preparation method specifically comprises the following steps: treating carbon black in a first acid solution to obtain activated carbon black; treating the single-walled carbon nanotube in a second acid solution to obtain an activated single-walled carbon nanotube; treating the activated single-walled carbon nanotube with a sulfanilamide solution to obtain a functionalized single-walled carbon nanotube; placing the graphene nanosheets in a third acid solution for treatment to obtain activated graphene nanosheets; the preparation method comprises the following steps: mixing amino silane hydrolysate and epoxy silane hydrolysate, adding activated carbon black, functionalized single-walled carbon nanotubes and activated graphene nanosheets, and treating to obtain a pre-modified filler; amino acid and a cross-linking agent are pre-polymerized to obtain an amino acid pre-polymerized solution, and the pre-modified filler is treated by the amino acid pre-polymerized solution to obtain the high-dispersion and high-thermal-conductivity filler. The method disclosed by the invention is simple to operate and low in energy consumption, the prepared filler is good in thermal conductivity and good in dispersity in a polymer matrix, and the thermal conductivity and the mechanical property of a polymer are greatly improved.

The invention discloses a gradient gradual change type powder material as well as a preparation method and application thereof. The gradient gradual change type powder material comprises a non-metal core, a transition layer, a gradual change layer and a modification layer. The gradient powder material provided by the invention shows excellent strength-ductility synergistic effect, high fracture toughness and enhanced fatigue, wear and corrosion resistance, is good in metal wettability, can effectively reinforce a metal matrix and improve the performance of the metal matrix, can also be well dispersed in resin, and can be applied to the field of metal materials. The gradient powder material disclosed by the invention has a wide application prospect, and can be applied to the fields of heat dissipation of electronic devices, high-speed cutting tools, grinding material and grinding tool materials, high-temperature protection materials and the like.

The invention relates to the technical field of thermal management material preparation, solves the technical problems of loose heat conduction network structure and non-uniform heat conduction direction of a flexible composite phase change material, and particularly relates to a magnetic polymer-based flexible composite phase change material and a preparation method thereof. Comprising the following steps: preparing a modified polydimethylsiloxane prepolymer from a carbon nanotube dispersion liquid and a polydimethylsiloxane prepolymer; adopting a Pickering emulsion method to mix 42 # paraffin, the modified polydimethylsiloxane prepolymer and nano cellulose to prepare a composite phase change material emulsion; silver mirror reaction is adopted to carry out surface silver plating on the magnetic neodymium iron boron particles; the magnetic polymer-based flexible composite phase change material is prepared from the composite phase change material emulsion and the surface-silvered magnetic neodymium iron boron particles. The high flexibility and magnetism of the prepared material in a normal temperature state endow the material with a more convenient installation mode and lower contact thermal resistance, the heat conduction network structure and component compatibility of the material are improved, and the application requirements of a phase change thermal management technology can be met.

The invention relates to the technical field of phase change microcapsules, in particular to a polyurea / polyacrylate double-layer shell material phase change microcapsule and a preparation method thereof. The microcapsule sequentially comprises a phase change material core material, a polyacrylate shell material and a polyurea shell material from inside to outside, and is prepared from the following raw materials: a polyisocyanate monomer, an acrylate monomer, an acrylate functional monomer, an acrylate cross-linking agent, a chain extender, an initiator, a surfactant, a phase change material and water. According to the invention, polyurea interfacial polymerization and polyacrylate suspension polymerization are combined to form a double-layer shell material for coating to prepare the phase change microcapsule, so that the phase change microcapsule has excellent sealing property, durability and high enthalpy value performance.

The present disclosure is related to a system for generating high-temperature fluids, designed to reduce carbon emissions and improve energy efficiency in various industrial processes. The system leverages advanced thermal energy transfer and storage technologies to efficiently utilize diverse energy sources, including grid electricity, renewable energy, and waste heat from industrial processes. Particularly, the system comprises a heating subsystem, a heat transfer and storage subsystem, a post-heating subsystem, and an electrical feeding subsystem, a fluid circulation subsystem and a cooling circulation subsystem. The heat transfer and storage subsystem utilize innovative materials and techniques to efficiently store and release thermal energy, enabling the system to operate with high thermal efficiency and flexibility.The system can be integrated into various industrial processes, and by optimizing energy utilization and reducing reliance on fossil fuels, the system contributes to a more sustainable and environmentally friendly future. Additionally, the system can be integrated with different renewable electricity generation systems such a photovoltaic, wind, hydroelectric, among others. The system can also be integrated with the electrical grid, providing valuable grid services such as load balancing, energy shifting, and frequency regulation. This enhances grid stability and enables the system to contribute to a more resilient and efficient energy infrastructure.Furthermore, this invention offers a promising solution for reducing carbon emissions, improving energy efficiency, and enhancing the flexibility and reliability of industrial processes.

The invention relates to the technical field of drilling fluid cooling, and discloses a phase change microcapsule suitable for drilling fluid cooling and a preparation method thereof.The phase change microcapsule comprises a capsule wall stabilizing material and a capsule core phase change material, and the capsule wall stabilizing material comprises polyurethane, polyurea, polyamide, polyimide, polystyrene and a first organic solvent; the capsule core phase change material comprises paraffin, fatty acid, polyol, inorganic hydrated salt, polymer gel, expanded graphite, carbon nanotubes, metal nanoparticles and a second organic solvent, and the first organic solvent is at least one of toluene, xylene, cyclohexanone and the like. The temperature of the drilling fluid is kept at a relatively low level, the cooling of the drilling fluid is realized, so that the drilling efficiency is improved, harmful solvents and additives are not used in the preparation process of the phase-change microcapsules, the phase-change microcapsules are pollution-free to the environment, and the requirements of greenness and environmental protection are met.

The invention discloses a preparation method of a composite phase-change temperature-adjusting organic fiber membrane with a flexible core-shell structure, and belongs to the field of intelligent textile materials.The preparation method comprises the following steps that polyacrylonitrile (PAN) serves as a sheath layer material, n-octadecane serves as a core layer phase-change material, and the composite phase-change fiber membrane is prepared through a melt spinning method and a coaxial electrostatic spinning technology. According to the invention, the fiber membrane with high melting enthalpy value (171.6 J / g), excellent thermal stability (the latent heat is still 117.7 J / g after 100 times of heating-cooling circulation) and excellent mechanical properties (the tensile strength is 2.418 MPa, the tensile yield stress is 2.331 MPa, the tensile strain at break is 36.5%, and the elastic modulus is 58.226 MPa) can be prepared; a new thought is provided for preparing intelligent textiles with good flexibility and efficient heat management capability.

The invention discloses a self-repairing high-energy-storage ice-snow-resistant double-layer composite microcapsule suitable for an asphalt surface layer and a preparation method and application thereof, and relates to a microcapsule preparation method and application thereof. The invention aims to solve the technical problems of poor core material release and self-healing effects, unstable shell wall material, low heat conductivity, easy leakage and single function of the existing self-repairing microcapsule for the asphalt pavement. The double-layer composite microcapsule is sequentially composed of an inner phase change microcapsule core, an inner phase change microcapsule shell, an outer self-repairing microcapsule core and an outer self-repairing microcapsule shell from inside to outside. Preparing an internal phase change microcapsule core from n-caprylic acid and tetradecane; preparing an internal phase change microcapsule shell by using a carbon nano tube and a double polymer; preparing an external self-repairing microcapsule core from bio-oil and a carbon nanotube; the outer self-repairing microcapsule shell is prepared from the carbon nano tube and the double polymer. Compared with a common asphalt pavement, the healing index of the surface layer of the asphalt pavement prepared from the double-layer composite microcapsule is improved by 8.1%-26.3%. The method can be used in highway fields.

The invention discloses an organic silicon cooling liquid and a preparation method thereof, the product has low viscosity and high flash point, and relates to the field of application of single-phase cooling liquid for heat dissipation of heating equipment, and the specific method comprises the following steps: uniformly mixing olefin and a catalyst at 20-30 DEG C, heating to 35-45 DEG C, dropwise adding hydrogen-containing siloxane, and controlling the temperature of the reaction liquid to be in a range of 60-130 DEG C; after adding, continuously stirring; cooling after the reaction is finished, and removing residual olefin to obtain a final product with a general formula of (CH3) 3SiO-[R1R2SiO] nSi (CH3) 3, wherein R1 is an alkyl group ranging from 8 to 16; r2 is a methyl group or a trimethylsiloxy group; n is equal to 1-2. The prepared single-phase organic silicon cooling liquid has the performance of high flash point and low viscosity, is low in surface tension, good in fluidity, more comprehensive in coverage, better in heat dissipation effect, good in compatibility with materials of a data center, free of swelling and other damage with related materials, and safe and long-acting.

The invention provides a boron nitride / epoxy resin heat-conducting composite material as well as a preparation method and application thereof. The boron nitride / epoxy resin heat-conducting composite material comprises the following raw material components: lignosulfonate; boron nitride; deionized water; a carboxymethyl nano cellulose solution; carboxylating the carbon nanotubes; borax; an epoxy resin; 1, 1, 2-cyclohexanedicarboxylic anhydride; the catalyst is 2, 2, 4, 6-tri (dimethylaminomethyl) phenol. The invention relates to a preparation method and application of a novel h-BN (boron nitride) composite material for thermal management, in particular to a three-dimensional vertical orientation composite material prepared by using lignosulfonate (LS) modified h-BN, cellulose nanofibers (C-CNF), carboxymethyl carbon nanotubes (C-CNT) and borax (B) as raw materials and adopting an ice template method. And the filler can be used as a novel enhanced heat conduction and electrical insulation filler in epoxy resin. According to the invention, BN is firstly modified, and surface modification is carried out on BN through sodium lignin sulfonate, so that compared with direct use of unmodified BN, the problem of poor compatibility and dispersibility of BN in the composite material is solved, and the heat-conducting property of the composite material is further improved.

The invention belongs to the technical field of heat-conducting materials, and provides liquid metal-based composite heat-conducting silicone grease as well as a preparation method and application thereof. The modified silicone oil, the liquid metal, the heat-conducting auxiliary filler and the hydrophobic fumed silica in a specific ratio are used as main components of the liquid metal-based composite heat-conducting silicone grease, and the liquid metal-based composite heat-conducting silicone grease prepared by the invention has high heat conductivity coefficient (up to 6.05-10.0 W / mk) and low heat resistance (as low as 0.01-0.03 DEG C * cm < 2 > / W), can maintain a good appearance in double-85, high temperature 125 DEG C and temperature cycle aging tests, and has a wide application prospect. Therefore, the structure is suitable for an assembly interface of a power module and a radiator with high-power heat dissipation requirements, and the heat dissipation efficiency is improved.

The invention discloses a flexible PI heat-conducting insulating film pad and a preparation method thereof, and relates to the field of film pads. The preparation method comprises the following steps: preparing Fe3O4 magnetic heat-conducting core and SiO2 insulating shell composite nanoparticles by a sol-gel method, treating and grafting epoxy groups by a silane coupling agent, performing ring-opening addition with one end amino group of amino-terminated polydimethylsiloxane, and reacting the other end amino group with polyethylene glycol diglycidyl ether, so that two flexible long chains are grafted on SiO2. Due to the modified composite nanoparticles and the flexible long-chain structure, the flexibility of the film pad is remarkably improved; thermal vibration of silicon-oxygen bonds and ether bonds promotes heat transfer, a hydrogen bond network is formed with a PI substrate to improve dispersion stability, particles are orderly arranged under the action of a high-frequency magnetic field to construct a three-dimensional heat conduction network, and heat conduction efficiency is enhanced; the SiO2 isolates the inner core from conducting and improves the insulating property of the film pad by virtue of good insulativity and no free charge in the flexible long-chain polymer. The flexible PI heat-conducting insulating film pad prepared by the invention has the effects of flexibility, heat conduction and insulation.

The invention discloses a polyethylene glycol-poly (2-vinyl) ethylene glycol copolymer and a preparation method thereof, and relates to the technical field of high polymer materials, and the structure of the polyethylene glycol-poly (2-vinyl) ethylene glycol copolymer is selected from any one of the following structural formulas: # imgabs0. The preparation method comprises the following steps: taking hydroxyl-containing polyethylene glycol and 4-vinyl-1, 3-dioxocyclopent-2-ketone or vinyl ethylene oxide as raw materials; under the action of a palladium catalyst and a phosphine ligand, the polyethylene glycol-poly (2-vinyl) glycol copolymer is efficiently prepared and can be used in the fields of hydrophilic / hydrophobic materials, drug carriers, antibacterial materials, phase change materials, shape memory materials and the like.

The invention discloses a phase change microcapsule modification method which comprises the following steps: S1, selecting a paraffin phase change material or a hydrated salt phase change material, and adding 0.5-1.5 wt% of a chemical stabilizer to modify the thermal stability of the phase change material; s2, compounding a microcapsule wall material by using polyurethane (PU) and nano silicon dioxide (SiO2), and adding 1wt% of carbon nanotubes (CNT) and 0.5-2wt% of nano silicon dioxide (SiO2); s3, the microcapsule wall material is subjected to surface hydrophobic coating treatment, polymethyl methacrylate (PMMA) is sprayed to form a waterproof isolation layer, the modified microcapsule phase change material is obtained, and in the step S1, 0.5-1.5 wt% of graphene oxide (GO) is added for modification when the paraffin phase change material is selected. The preparation method is reasonable in design, energy storage, heat preservation and mechanical properties of PCM-UHPC are remarkably improved through multi-layer composite modification of the PCM microcapsules and the nano-enhancement technology of the UHPC matrix, and the preparation method is suitable for the fields of energy-saving buildings, temperature control infrastructures and the like and has wide application prospects.

The invention provides a composition, an adsorption and storage device containing the composition and an associated gas recovery system. The composition comprises a hierarchical porous MOFs-based composite phase change material and an adsorption material, and the adsorption storage device is an adsorption storage tank with the composition as bed filling. The associated gas recovery system mainly comprises a pressurizing unit, a cooling, condensing and dehumidifying unit and an adsorption and storage unit, wherein the adsorption and storage unit is the adsorption and storage device. The associated gas recovery system can realize a medium pressure-low temperature-phase change temperature control-adsorption storage single pull well associated gas recovery process, and realizes efficient recovery of single pull well associated gas with small gas volume, low casing pressure and far distance from a gathering and transportation station at low cost at low pressure (specifically 2-4MPa).

The invention discloses a biochar / carbon nanotube / myristic acid composite phase change material as well as a preparation method and application thereof, and belongs to the technical field of heat storage. The meat biochar / carbon nanotube / myristic acid composite phase change material is prepared by adopting a vacuum impregnation method. The original biochar is modified by KOH, so that the specific surface area and pore volume of a sample are increased, the specific surface area of the modified KBC3 reaches 813.56 m < 2 > / g, and the loading capacity of the KOH modified biochar on MA is increased to 63%. The result shows that the MA sample is successfully loaded into the porous material, and the structure is kept intact. In order to further improve the loading rate and the leakage resistance of the phase change material, carbon nanotubes are doped in the KBC / MA phase change material, and when the loading rate of MA is improved to 75%, KBC1.5 / MA severely leaks in a shape stability performance experiment, and the mass loss rate reaches 8.5%. And KBC1.5 / CNT1 / MA only has little leakage in the thermal stability test process, so that the leakage resistance of the composite phase change material is greatly enhanced. Through BC modification and CNTs introduction, the heat conduction capability and the photothermal conversion capability of the composite PCMs are greatly improved.

The invention discloses an adsorption heat storage material with a multi-stage stepped pore structure and a preparation method of the adsorption heat storage material, according to the material, a metal foam matrix is combined with the multi-stage pore structure, and the storage and release efficiency of heat energy is remarkably improved. Specifically, the metal foam matrix is composed of a plurality of metal foam layers with different porosities, and the porosities are gradually increased in the heat source direction, so that the heat resistance is effectively reduced, and the diffusion of adsorbate is accelerated. The adsorbent coating is coated with an adsorption material mixture containing a template agent, and is subjected to drying and roasting treatment to form a multi-stage pore structure comprising macropores, mesopores and micropores, so that the adsorption diffusion speed and the adsorption capacity are improved. The material not only improves the heat energy storage and energy release capabilities, but also optimizes the diffusion rate of adsorbate. According to the preparation method, through simple and convenient processes such as splicing of the metal foam layer and coating of the adsorbent, the production cost is reduced, the preparation process is efficient and controllable, and wide application prospects are achieved.

The invention relates to the technical field of fused salt phase change materials, and discloses a fused salt phase change energy storage material and a preparation method and application thereof. The preparation method of the fused salt phase change energy storage material comprises the following steps: mixing NaNO3 and KNO3 according to a mass ratio of 6: 4, grinding, heating to 400 DEG C, melting, cooling, and grinding again to obtain eutectic salt; the preparation method comprises the following steps: dispersing few-layer graphene oxide and sodium ascorbate in water, and uniformly mixing to obtain slurry; performing hydro-thermal treatment on the slurry, and performing freeze drying to obtain graphene aerogel; dissolving the eutectic salt in water to prepare a saturated solution, and carrying out dipping treatment on the graphene aerogel in the saturated solution under vacuum; and freeze-drying a product subjected to dipping treatment to obtain the fused salt phase change energy storage material. According to the preparation method, the molten salt uniformly permeates pores of the graphene aerogel by adopting a vacuum impregnation method, and the infiltration angle of graphene and the molten salt is large, so that the molten salt is not easy to leak, the heat conductivity is further improved, and the heat conduction efficiency and the phase change stability are remarkably improved.

The invention belongs to the technical field of micro-reaction, and particularly relates to a micro-mixer and a method for continuously preparing nano cooling liquid. Comprising a reaction cavity in which a plurality of reaction flow channels are arranged, all the reaction flow channels are used for preparing nano cooling liquid and are vertically arranged in the reaction cavity in a three-dimensional spiral shape, and each reaction flow channel is internally provided with a plurality of disturbance structures and a plurality of distributors which are arranged in the reaction cavity and located above all the reaction flow channels, each distributor is connected with the inlets of all the reaction flow channels, the collectors are arranged at the outlets of all the reaction flow channels, and pressure regulating structures are arranged in the collectors. According to the invention, the distributor is adopted to enable the reaction fluid to flow into the corresponding reaction flow channel, the three-dimensional spiral flow channel design in the reaction cavity is folded in space, so that the overall size of the microreactor is not too large, and a disturbance structure is arranged in each reaction flow channel, so that the mixing efficiency can be further improved; the production rate of the microreactor is improved, and blockage in a flow channel is avoided.

The invention belongs to the technical field of refrigerants, and provides a mixed refrigerant for replacing R290 and a preparation method and application thereof, the mixed refrigerant comprises a first component, a second component and a third component; the first component is trans-1, 2-difluoroethylene, the second component is 2, 3, 3, 3-tetrafluoropropene, and the third component is trifluoromethyl methyl ether; compared with R290 refrigerants in the prior art, the mixed refrigerant has the advantages that flammable and explosive components do not exist, and high-risk combustible gas clusters cannot be formed due to density layering after leakage, so that the mixed refrigerant has high safety performance, and the safety level can be not lower than A2L; the mixed refrigerant has the environment-friendly characteristic of low GWP, the GWP is smaller than or equal to 150, and the environment-friendly requirement is met; the thermophysical property and the refrigeration and / or heating cycle performance of the mixed refrigerant are similar to or better than those of R290; the mixed refrigerant can be used for directly replacing an R290 refrigerant.

A thermal interface material including at least a diamond-containing filler; a silicone oil, as well as a plurality of additives.