465 results about "Thermo responsive" patented technology

Described are compositions for use as and methods for generating water harvesting material. The disclosed compositions can include a thermoresponsive gel network, a hygroscopic material, a copolymer, a photothermal agent, a crosslinking agent, or any combination thereof to generate or for use as an atmospheric water harvesting material. The disclosed compositions and methods advantageously allow for the efficient sorption and desorption of atmospheric moisture in low relative humidity environments. The atmospheric water harvesting material can be useful for generating potable water in environments for example, where access to clean water is limited.

The invention relates to a concrete anti-cracking self-repairing agent in the technical field of building materials, and aims to solve the problem that concrete cracks are difficult to self-repair. According to the technical scheme, the self-repairing agent is characterized by comprising a microbial repairing unit formed by ZSM-5 type zeolite molecular sieve loaded bacillus pasteurii spores, mesoporous silica particles loaded with L-calcium aspartate and Fe3O4 (at) SiO2 core-shell nanoparticles which are fixed through an in-situ polymerization coating layer to form a magnetic thermal response capsule layer coating the surface of the microbial repairing unit, pLGA microspheres containing yeast extract are positioned on an interface of zeolite and hydrogel, and a trehalose-anhydrous calcium chloride eutectic compound is used as a directional mineralization accelerant. The concrete anti-cracking self-repairing agent provided by the invention is mainly used for intelligent identification and self-repairing of concrete cracks, and efficient repairing is realized through a microbial mineralization, calcium ion slow release and magnetic thermal response synergistic mechanism.

The invention discloses light self-repairing concrete and a preparation method thereof, and relates to the technical field of concrete. The method comprises the following steps: firstly, efficiently packaging a calcium nitrate solution in hollow glass beads by utilizing a negative pressure impregnation technology; then growing a porous zeolite crystal coating on the surface of the microbead in situ by adopting a sol-gel method to form a self-repairing filler with a core-shell-hole gradient structure; when the concrete cracks to cause the cracking of the microbeads, the Ca < 2 + > in the cavity is quickly released, and the Ca < 2 + > adsorbed in the zeolite layer is gradually dissociated along with water permeation, so that the new microcracks are continuously repaired. Then, uniformly coating the surface and pores of the carboxymethyl cellulose hydrogel network with polydopamine in an in-situ oxidative polymerization manner to form composite hydrogel with photo-thermal responsiveness; lighting and heating to trigger dynamic coordination bond dissociation; meanwhile, heat drives rapid directional crystallization of a repair product by promoting the ion diffusion rate, and a compact mineralization layer is formed. The concrete prepared by the invention has the effects of light weight and self-repairing.

The invention relates to the technical field of preparation of composite materials, and discloses a method for improving a carbon fiber and aluminum-based resin composite material by utilizing temperature regulation and control, which comprises the following steps: S1, forming a multifunctional interface layer on the surfaces of carbon fibers and aluminum-based materials, and enhancing the interface bonding force of the interface layer through the combination of various nano materials and a layered structure; s2, performing resin impregnation by using a self-temperature-regulating resin system containing temperature-sensitive microcapsules, wherein the system automatically regulates the curing temperature and pressure within a specific temperature range; s3, in the curing process, a multi-stage phase change material is adopted, and internal temperature distribution is regulated and controlled through thermal response behaviors at different temperature stages; and S4, optimizing the flowability and permeability of the resin through an ultrasonic-assisted technology. By introducing the multifunctional nano material and the multi-stage phase change material, the conductivity, the mechanical strength and the thermal stability of the carbon fiber and aluminum-based resin composite material are remarkably improved.

The invention discloses a cellulose coated diaphragm and a preparation method thereof in the field of lithium ion batteries, the diaphragm comprises alpha-cellulose pulp, a cellulose grafted phenylboronic acid-co-oligomeric ethylene oxide copolymer, a thermal response star zwitterionic polymer and nano aluminum oxide, and an N-methylmorpholine-N-oxide aqueous solution is adopted as a solvent system. The preparation method comprises the following steps: firstly synthesizing a cellulose grafted copolymer with dynamic borate bonds through atom transfer radical polymerization, then preparing a star polymer with thermal response arms and zwitter-ion terminals by taking cyclodextrin as a core, and finally mixing all the components to prepare coating slurry. And the composite diaphragm is prepared through the processes of coating, phase conversion, ultraviolet curing and drying. The diaphragm combines the thermal stability and lyophilic property of cellulose, forms a dynamic self-adaptive interface layer through the synergistic effect of two functional compounds, has the advantages of active safety protection, dendritic crystal inhibition, long cycle life and the like, and remarkably improves the comprehensive performance of the lithium ion battery.

The invention discloses a high-safety temperature-responsive electrolyte, a lithium ion battery and a sodium ion battery, the high-safety temperature-responsive electrolyte comprises a thermal response solvent, a cosolvent and an electrolyte salt, the thermal response solvent is a thermal response polymer monomer, the thermal response polymer monomer has at least one of the structures of vinyl ether, divinyl ether, dialkenyl amide and dialkenyl butanediimine, the thermal response polymer monomer can quickly form a polymer solid electrolyte under the catalysis of an initiator salt in electrolyte salt under a high-temperature condition, and the fixation of the solid electrolyte enables a diaphragm in a battery not to collapse, so that the battery diaphragm can be used as a lithium ion battery diaphragm. Therefore, short circuit caused by thermal shrinkage and fusion of the diaphragm is avoided, and thermal runaway is avoided. The electrolyte can be used for preparing the lithium-ion and sodium-ion battery, and the lithium-ion and sodium-ion battery can keep a relatively high capacity retention rate while giving consideration to the safety performance.

The invention relates to the technical field of biomedical materials, and discloses an electret electrostatic therapy membrane and a preparation process thereof.The electret electrostatic therapy membrane is prepared from, by mass, 15%-20% of fluorinated polyether ester, 10%-20% of a composite nano-fiber material, 10%-20% of a composite nano-fiber material, 10%-20% of a composite nano-fiber material and the balance water. 1%-2% of carboxymethyl chitosan; 2-5% of nano cerium oxide particles with the particle size of 50-100 nm; 0.5-1.0% of graphene quantum dots, the particle size of which is 5-10 nm; 1%-2% of sodium hyaluronate; the components are prepared into a film through an electrostatic spinning method, electret performance is given to the film through a charge injection process, finally, the film body is attached to a flexible silica gel adhesion layer, and the flexible silica gel adhesion layer is externally coated with a peelable protective film so that the structural integrity can be kept before the flexible silica gel adhesion layer is used. The composite membrane body disclosed by the invention shows excellent adhesion, charge activation capability and thermal response performance in applications of electrostatic therapy, dielectric assisted stimulation and the like, and has good multi-scene adaptability and clinical application potential.

The invention relates to a bio-based degradable UV-curable coating material for a microcapsule fire extinguishing agent, the microcapsule fire extinguishing agent and a preparation method and application of the bio-based degradable UV-curable coating material for the microcapsule fire extinguishing agent. The bio-based degradable UV-curable coating material for the microcapsule fire extinguishing agent is prepared from the following components in parts by weight: 100 parts of bio-based hyperbranched polyurethane / acrylate prepolymer; 10-150 parts of a reactive flame-retardant monomer, 0.1-5 parts of a photoinitiator and 0-70 parts of a solvent. The coating material for the microcapsule fire extinguishing agent is a thermal response type material, when the coating material is prepared into a shell layer of the microcapsule fire extinguishing agent and the environment temperature reaches a preset threshold value, the shell layer is rapidly broken due to thermal expansion coefficient difference and chemical bond fracture, internal fire extinguishing liquid is released, the process can be completed within 3 seconds or less, rapid response in the initial stage of a fire disaster is ensured, and fire extinguishing efficiency is improved. The thermal response speed is high, the microcapsule fire extinguishing agent can be rapidly broken in the early stage of a fire, rapid release of fire extinguishing liquid is achieved in the early stage of the fire, efficient fire extinguishing is achieved, a fire source is controlled in time, and fire spreading is effectively prevented.

The invention discloses a photo-thermal and thermal response release antibacterial film as well as a preparation method and application thereof, and belongs to the technical field of functional packaging. The photo-thermal and thermal response release antibacterial film is prepared by compounding a substance with photo-thermal conversion performance and a natural plant essential oil clathrate compound into a film forming base material, so that the combination of contact type sterilization and release type sterilization is realized; according to the antibacterial film, light with specific wavelength can be adopted to irradiate the film in the early storage stage of food, so that the film is rapidly heated, most microorganisms on the food are killed at proper temperature, meanwhile, the speed of diffusion of essential oil from an inclusion compound is increased under the driving of thermal power, and the release rate is greatly increased; therefore, the effect of double sterilization is achieved through release type and contact type synergistic sterilization; the advantages of the two sterilization modes are fully utilized, the problems existing in the two sterilization modes are solved, and the antibacterial efficiency of the film is greatly improved.

The invention discloses a preparation method of a composite micro-groove super-hydrophobic low-ice-adhesion photo-thermal film. The preparation method comprises the following steps: (1) constructing a low-elasticity-modulus photo-thermal composite sponge substrate through a solvothermal method; (2) uniformly coating the surface of a substrate with a polydimethylsiloxane (PDMS) precursor solution by adopting an aerosol-assisted deposition technology, and carrying out thermocuring to form a functional composite interface layer; and (3) constructing a multi-stage scallop surface-imitating micro-nano groove composite structure on the surface of the interface layer by using a femtosecond laser micro-nano processing technology. The prepared film has super-hydrophobicity, the surface of the film is in a Cassie-Baxter wetting state with a 164-degree contact angle and a 1-degree rolling angle, and the film has a surface self-cleaning function. Under the icing condition, the adhesion strength of an ice layer of the system is obviously reduced to 2.57 kPa, the static delay icing time is effectively prolonged to 1587 s, and the system has the photo-thermal response characteristic and can realize rapid icing ablation under the standard solar irradiance; the preparation method has the characteristics of high process controllability, environment friendliness and the like, and is suitable for large-scale continuous production.

Provided herein are compositions of solid-state ionically conductive composite materials that include particles of an inorganic phase in a matrix of an organic phase having a positive thermal coefficient of expansion. When the temperature of the composition is below a cutoff temperature Tc, the composition is ionically conductive and may be used as an electrolyte. As the temperature increases above Tc, the organic phase expands and reduces the ionic conductivity of the composition.

The invention relates to the technical field of resin materials, in particular to an epoxy anhydride composition capable of being chemically thickened and a preparation method thereof, and the epoxy anhydride composition consists of the following components in parts by weight: 35-45 parts of epoxy resin; 40-55 parts of a modified anhydride curing agent; 3-8 parts of a chemical thickening agent; 0.5 to 2 parts of a latent accelerator; 5 to 20 parts of a toughening agent; 0.5 to 5 parts of nano clay modified by a surfactant; 0.01 to 0.5 part of graphene quantum dots modified by a surface active agent; 0.1 to 1 part of a two-dimensional transition metal carbide / nitride modified by a surfactant; 0.1 to 2 parts of a thermally responsive polymer; 0.05 to 1 part of a photoresponsive molecule; 0.5 to 3 parts of nano particles; and 0-10 parts of high-performance fiber. The heat and humidity resistance, the size stability and the deformation resistance of the material are remarkably improved, the rapid heating and cooling circulation adaptability is enhanced, the good size stability is maintained, and the conductivity and the electromagnetic shielding performance can be enhanced.

The invention relates to a positive pole piece which comprises a positive current collector and a positive active material layer arranged on at least one surface of the positive current collector, and the positive active material layer comprises a positive active material, sulfide solid electrolyte and a core-shell flame retardant, the core-shell type flame retardant comprises a core, a first shell layer coating the core, a second shell layer coating the first shell layer and a third shell layer coating the second shell layer, the core comprises an organic flame retardant, the first shell layer comprises a thermal response polymer, the melting point of the thermal response polymer is 125-275 DEG C, the second shell layer comprises an inorganic flame retardant, and the third shell layer comprises an inorganic flame retardant. And the third shell layer comprises a conductive polymer and a carbon nanomaterial. The positive pole piece provided by the invention has improved safety, and also has enhanced compression resistance and conductivity.

The invention belongs to the technical field of thermal power heating surface treatment, and provides a multi-layer composite self-repairing anti-oxidation coating for a boiler heating surface and a preparation method of the multi-layer composite self-repairing anti-oxidation coating aiming at the technical problems that a thermal power boiler heating surface protective coating is insufficient in bonding strength, insufficient in long-term anti-oxidation capacity and concentrated in interface stress among multi-layer structures. Comprising a bonding layer, a gradient transition layer, a self-repairing functional layer and a ceramic surface layer which are sequentially arranged from inside to outside. The self-repairing functional layer is made of NiCoCrAlY alloy, the bonding layer is made of NiCrAlY alloy, the gradient transition layer comprises four layers of gradient transition layer units, each layer of gradient transition layer unit comprises a gradient composite structure of NiCrAlY and nano Al2O3, the self-repairing functional layer comprises NiCoCrAlY serving as a base body, thermal response type microcapsules are embedded in the NiCoCrAlY base body, and the ceramic surface layer comprises a nano ceramic material composed of Cr, Co, Ni, Fe, Al, Ti and B elements.

The invention discloses a novel polymer solid electrolyte with a wide electrochemical window and a preparation method thereof.The preparation method comprises the steps that a quinoline compound and metal sodium react for a certain time, and a 4, 4 '-biquinoline intermediate product is obtained after separation; carrying out monosubstitution reaction on the obtained 4, 4 '-biquinoline intermediate product and brominated alkane, then adding bromoethylene to carry out disubstitution reaction, then adding divinyl ether to carry out addition reaction, and then adding an aqueous solution containing fluorine anions to carry out anion exchange reaction to obtain an olefin-terminated biquinolinium compound; mixing the MOF material with graphene oxide, and carrying out cross-linking reaction on the obtained olefin-terminated biquinolinium compound in a nitrogen environment to prepare an MOF composite material; in an inert atmosphere, PNIPAM and the MOF composite material prepared in the step 3 are subjected to a reaction, and the thermal response self-adjusting composite electrolyte is prepared; and adding a catalyst and a lithium salt into the obtained composite electrolyte, and heating and curing to obtain the polymer solid electrolyte with the wide electrochemical window.

The invention discloses a double-layer structure composite material with rapid photo-thermal response and high anisotropic heat conductivity ratio and a preparation method and application thereof.Graphene sheets and thermoplastic polyurethane are compounded, a melt blending processing technology is combined, and a double-nozzle FDM 3D printing technology is utilized; and the high-heat-conductivity graphene-polyurethane layer is combined with the heat-insulating pure polyurethane layer to form an anisotropic heat conduction structure. The'heat conduction-heat insulation 'double-layer design has originality in the field of heat management, and the problem that efficient heat conduction and heat retention are difficult to consider by traditional materials is solved. The unique electronic energy band structure of the graphene enables the graphene to effectively absorb light energy in a wide spectral range, so that the prepared material can realize efficient and rapid photothermal conversion. In addition, compared with a traditional material processing mode, the FDM 3D printing technology has the advantages of being low in cost, easy to operate, diversified in material, free in design degree and the like, is suitable for large-scale industrial production and has wide application prospects.

The invention provides a copper-based graphene composite material as well as a preparation method and application thereof, and the preparation method comprises the following steps: plating copper films on two surfaces of graphene paper subjected to ion cleaning by adopting magnetron sputtering to obtain Cu-GP; placing copper foils on two sides of the Cu-GP, and performing vacuum hot pressing to obtain the copper-based graphene composite material. According to the method, through magnetron sputtering deposition and vacuum hot pressing technologies, the prepared composite material has excellent in-plane heat conductivity and inter-plane heat conductivity; and the material also has thermal responsiveness and excellent mechanical properties, such as toughness, breaking strength and the like.

A pump system including a prevention mechanism for preventing excessive fluid temperature buildup of system fluid. The overheat prevention mechanism includes a thermally-responsive control component (130) made with a thermally-responsive material. The thermally-responsive control component is located in the pump system (112) such that the thermally-responsive material is in thermal communication with the system fluid for effecting a change in temperature of the thermally-responsive material. The thermally-responsive material is configured to have an activation temperature that is a predefined amount less than a maximum operating temperature of the system fluid. The thermally-responsive control component is configured to cooperate with a pump control mechanism in the system to decrease pump output pressure in response to the thermally-responsive material being heated by the fluid to a temperature that is equal to or greater than the activation temperature of the thermally-responsive material.

The invention relates to the technical field of fire extinguishing agents, and discloses a fluoride-free anti-solubility foam fire extinguishing agent and a preparation method thereof.The fluoride-free anti-solubility foam fire extinguishing agent comprises a hydrocarbon surfactant, a carboxyl modified organosilicon surfactant, a foam stabilizer, a cosolvent, water and a pH regulator; the carboxyl modified organic silicon surfactant is obtained by modifying an organic silicon surfactant by using maleic anhydride; the foam stabilizer contains xanthan gum and a component A, according to the invention, the organosilicon surfactant is modified, so that the obtained carboxyl modified surfactant has good surface activity and water solubility; xanthan gum and a component A (polyethylene oxide-polypropylene oxide-polyethylene oxide and other substances) are compounded to serve as a foam stabilizer, so that the foam stability and the anti-dissolving performance can be improved, and the foam stabilizer also has temperature-sensitive-thermal response performance; under the combined action of the components, the fire extinguishing agent provided by the invention has excellent fire extinguishing performance and can quickly extinguish non-polar fuel and polar fuel.

The invention discloses self-repairing waterborne polyurethane based on double dynamic bond synergy and a preparation method thereof.The method comprises the following steps that 1, in the nitrogen atmosphere, after isophorone diisocyanate, polytetrahydrofuran diol and dimethylolpropionic acid react for a period of time, a catalyst is added for continuous reaction, and a prepolymer is synthesized; (2) adding N, N-di-tert-butyl ethylenediamine into the prepolymer, and carrying out chain extension reaction; (3) adding dithiothreitol into the solution after the reaction in the step (2) to carry out cross-linking reaction; and (4) adding triethylamine into the solution obtained after the reaction in the step (3), and carrying out a salt forming reaction to obtain the self-repairing waterborne polyurethane emulsion based on double dynamic bond synergy. High self-healing efficiency and mechanical performance are achieved by introducing dynamic covalent bonds with double thermal responses, and reprocessing and recycling are achieved at the same time.

The invention discloses a lithium ion battery electrolyte with thermal response passivation and flame retardant functions as well as a preparation method and application thereof. The electrolyte comprises a basic electrolyte, a lithium-phobic passivator, a lithium-phobic flame retardant and a lithium-phobic cosolvent, wherein the basic electrolyte consists of a lithium salt and a lithium-loving main solvent; the mass of the lithium-phobic passivator is 4-10% of the mass of the basic electrolyte, the mass of the lithium-phobic flame retardant is 3-6% of the mass of the basic electrolyte, and the mass of the lithium-phobic cosolvent is 1.7-5% of the mass of the basic electrolyte. The flammability of the electrolyte is inhibited by the lithium-phobic flame retardant; the lithium-phobic cosolvent is used for promoting homogeneous dispersion of the lithium-phobic flame retardant and the lithium-phobic passivator in the lithium-loving main solvent and synergistically enhancing the flame-retardant effect of the system; the lithium-phobic passivator can trigger polymerization in situ under a high-temperature condition to form a stable interface passivation film, so that a violent side reaction between active lithium on a negative electrode side and an electrolyte is effectively inhibited. Through the synergistic effect of multiple components, the intrinsic safety of the lithium ion battery under the condition of high temperature or thermal shock is remarkably improved.

The invention relates to the technical field of sewage treatment, in particular to a preparation method of a degradable bactericide for an oil field. According to the invention, a hydroxypropyl guanidine gum-polycaprolactone-ethylenediamine fragment copolymer is taken as a carrier, a methylisothiazolinone quaternary ammonium salt (Q-MIT) bactericide is loaded, and the degradable bactericide for the oil field is obtained by cooperating with a dodecyl ethyl sulfide (TC-SE) bactericide and combining with sodium polyaspartate. A carrier forms a hydrogen bond with a polar group on the surface of a biological membrane through a hydroxypropyl guanidine gum main chain to realize targeted anchoring, a polycaprolactone branched chain encapsulates Q-MIT through a hydrophobic effect, primary amino groups of ethylenediamine are introduced to form a pH sensitive Schiff base bond with Q-MIT, and the primary amino groups and adipic dihydrazide form a thermal response hydrazide bond to construct a dual dynamic covalent bond, so that controlled release of Q-MIT is realized, and the biomembrane is prepared. And moreover, the components of the whole system are connected through degradable chemical bonds, so that the environmental protection property and sustainability of oil field operation are guaranteed.

The invention discloses a photo-thermal response self-healing coating and a preparation method thereof, and belongs to the technical field of anticorrosive coatings. The preparation method comprises the following steps: dissolving an EVA copolymer in trichloromethane, dropwise adding into an aqueous solution of lauryl sodium sulfate, and stirring until the trichloromethane is evaporated to obtain EVA microspheres; the preparation method comprises the following steps: dispersing MXene in water, and dispersing EVA microspheres in DMF (Dimethyl Formamide); mixing and stirring the two materials to obtain an MXene-coated EVA material; the preparation method comprises the following steps: mixing water-based resin, PPGDGE and a curing agent, adding an MXene-coated EVA material, coating, and curing to obtain the photo-thermal response self-healing coating. Under near-infrared radiation, the photo-thermal response self-healing coating can be rapidly heated, the shape memory process of a coating matrix is started, the EVA material is subjected to phase change to fill the damaged part of the coating, and the MXene nanosheet prolongs the permeation time of electrolyte, so that the coating has efficient damage healing capacity and an anti-corrosion effect.

The preparation method comprises the following steps: firstly, dispersing hydroxylated carbon nanotubes in water, carrying out ultrasonic treatment to form a uniform dispersion liquid, and then uniformly mixing the uniform dispersion liquid with a bacterial cellulose dispersion liquid, so as to obtain the carbon nanotube-based aerogel with the photo-thermal electric heating effect. Adding methyltrimethoxysilane sol which is hydrolyzed in advance, stirring to form a precursor system, and then performing directional freezing, freeze drying and heat treatment to obtain the carbon nanotube-based aerogel with the photo-thermoelectric heating effect. The carbon nanotube-based aerogel has the super-hydrophobic characteristic, the surface water contact angle is 161 DEG C, the surface temperature is rapidly increased to 126.7 DEG C under applied voltage, photo-thermal response is rapidly generated under simulated sunlight irradiation, the surface temperature is rapidly increased to 117.7 DEG C, and the carbon nanotube-based aerogel is suitable for rapid adsorption and separation of high-viscosity crude oil, has excellent chemical stability and mechanical stability, and can be used in the field of adsorption and separation of high-viscosity crude oil. And after the surface is broken, excellent super-hydrophobic performance and efficient photo-thermal-electric-thermal response capability are still kept.

The invention discloses a flame-retardant PC (polycarbonate) composite material based on high-temperature interface crosslinking and an in-situ reinforcement process thereof. The composite material comprises polycarbonate resin, reinforced fibers with a thermal response interface, a flame-retardant synergist and a processing aid. The core is that a thermal response interface layer and a sacrificial protection layer are sequentially constructed on the surface of the reinforced fiber, the thermal response interface layer is formed by grafting a silane coupling agent containing peroxide bonds through covalent bonds, and the sacrificial protection layer is a low-melting-point coating material. According to the design, the material has the temperature-triggered intelligent response characteristic; in daily processing and use, the protective layer ensures that an interface is stable and the binding force is slowly repaired; under the condition of high-temperature fire, the interface layer is quickly triggered to form carbon through crosslinking, so that the flame-retardant efficiency is remarkably improved, and melt dripping and a candlewick effect are effectively inhibited. The high mechanical strength, the long-acting durability and the intrinsic flame-retardant safety of the material are synchronously realized, and the material is suitable for the high-requirement fields of electronic appliances, new energy automobiles and the like.

The present disclosure generally relates to carbon sequestration materials, and related systems, articles, and methods. In some embodiments, the carbon sequestration material comprises a gel. In some embodiments, the gel comprises a hydrophilic material, a thermo-responsive polymer, and a carbon dioxide capture medium. In accordance with some embodiments, the gel, when in the presence of water, is capable of sequestering and / or releasing gaseous carbon dioxide. In some embodiments, the gel has a relatively large sequestration capacity such that a relatively large amount of carbon dioxide per gram of gel can be sequestered by the gel. In some embodiments, the gel sequesters a surprisingly large amount of carbon dioxide when exposed to relatively humid conditions. In some embodiments, the gel releases an advantageous amount of gaseous carbon dioxide that was previously sequestered by the gel.

The invention discloses a phase transition thermal response gel based on an ionic liquid / water binary solvent, and a preparation method and application thereof. The phase transition thermal response gel system comprises an N-isopropylacrylamide (NIPAm) monomer, an initiator, an accelerator, an ionic liquid and water. NIPAm is used as a thermal response unit, the introduction of the ionic liquid replaces a common cross-linking agent for hydrogel polymerization, and the interaction of multiple hydrogen bonds and ions formed between the ionic liquid and a poly N-isopropylacrylamide (PNIPAm) chain endows the system with the characteristic of phase transition. The phase transition thermochromic intelligent window of the ionic liquid / water binary solvent prepared by the invention has the characteristics of high light transmittance, fast response, adjustable response temperature and good stability, and overcomes the defects that the traditional thermochromic hydrogel generates serious volume shrinkage after generating long-term thermochromic circulation and the thermochromic performance is reduced; and a certain technical support is provided for the application of the thermochromic intelligent window.

The invention discloses a preparation method of a double-response self-repairing super-hydrophobic coating on the surface of an aluminum alloy. The preparation method is specifically implemented according to the following steps: step 1, preparing sea urchin-shaped photo-thermal particles Fe3O4-at-TiO2; step 2, preparing self-repairing porous boron nitride; 3, preparing thermal response particles by an emulsion method; step 4, carrying out photocuring and dynamic disulfide bond crosslinking modification; and 5, preparing the double-response self-repairing super-hydrophobic coating. The invention also discloses the coating prepared by the method, the light absorption area is increased by preparing the sea urchin-shaped Fe3O4-coated TiO2, and after the two materials form a heterojunction, absorption spectrums complement each other, so that the energy of sunlight can be more efficiently utilized, and the photothermal conversion efficiency is improved. Porous boron nitride (PBN) increases the specific surface area, loads more perfluoropolyether and forms a continuous heat conduction channel through a porous framework to improve the heat conductivity, it is guaranteed that heat can be transmitted to the thermal response shell to the maximum extent, and the thermal response efficiency is improved.

The invention provides a thermal response type nano polymer gel blocking agent and a preparation method thereof. The method comprises the following steps: mixing 20-40 parts of vinyl silicon dioxide microspheres, 30-80 parts of a temperature-sensitive monomer, 15-30 parts of dimethylaminoethyl methacrylate, 6-10 parts of 3-acrylamidophenylboronic acid, 1-5 parts of a cross-linking agent and 100-150 parts of water to obtain a mixed solution; and adding 0.1-0.3 part of an initiator, stirring and reacting under the protection of inert gas, cooling, filtering, washing and drying to obtain the thermal response type nano polymer gel blocking agent. The plugging agent can tolerate the high temperature of 180 DEG C or above for a long time, the pressure-bearing plugging capacity reaches 16 MPa or above, the plugging efficiency and the permeability recovery value of a low-permeability shale core reach 100%, shale micropores and micro cracks can be efficiently plugged, a plugging layer with the permeability being zero is formed near a well wall, and the purposes of stabilizing the well wall and protecting an oil and gas layer are achieved.

The invention discloses a transient convective heat transfer test method for a ceramic matrix composite component under high-temperature oxidation, and belongs to the field of engineering thermophysics. According to the transient flow heat exchange characteristic test method established by the invention, transient flow heat exchange characteristic test research in a high-temperature oxidation characteristic environment can be carried out on the CMC material component, thermal response characteristics and change rules of the CMC material component at different oxidation temperatures and time are obtained, and a foundation is laid for application of the CMC material component in aerospace high-temperature components. And a principle test verification method of the analysis model is provided.