51 results about "Thermo responsive" patented technology

This invention relates to the field of catalyst technology, specifically to a latent epoxy resin curing catalyst with precisely controllable activity and its preparation method. The catalyst is 1-(2-(N-tert-butyl-N'-phenylurea)ethyl)-3-(2-(phenyldithio)ethyl)imidazolium, which simultaneously possesses an imidazolium ring catalytic active center, a thermally hindered urea bond, a temperature-responsive dynamic disulfide bond, and an intramolecular hydrogen bond unit. Precise control of catalytic activity is achieved through the synergistic effect of these triple dynamic bonds. The catalyst exhibits excellent storage stability at room temperature, rapid curing at activation temperature, and is free of metal ions. The cured epoxy resin exhibits good dielectric properties. This invention's catalyst achieves a balance between excellent latency and rapid curing performance through the synergistic control of these triple dynamic bonds. It possesses excellent dielectric and mechanical properties, can be compounded with various curing agents, and its preparation method is simple and easy for industrial production.

The application discloses a self-repairing flexible bionic composite material with high tear resistance and a preparation method thereof. The method is characterized in that a room-temperature self-repairing flexible polyurea elastomer SSPU is prepared by reacting THI, DBI and PDMS. The self-repairing flexible bionic composite material with high tear resistance is prepared by physically mixing the room-temperature self-repairing flexible polyurea elastomer SSPU and a gallium-indium-tin liquid alloy. The self-repairing flexible bionic composite material has the advantages of not affecting the flexibility of the material, greatly improving the tear resistance of the material, and having excellent photo-thermal response characteristics and fast photo-thermal repair capacity, and is suitable for preparing various stretchable and functional devices.

This invention discloses a flame-retardant PC composite material based on high-temperature interfacial crosslinking and its in-situ reinforcement process. The composite material comprises polycarbonate resin, reinforcing fibers with a thermally responsive interface, a flame-retardant synergist, and processing aids. The core of this invention lies in the sequential formation of a thermally responsive interface layer and a sacrificial protective layer on the surface of the reinforcing fibers. The thermally responsive interface layer is formed by covalent grafting of a silane coupling agent containing peroxy bonds, while the sacrificial protective layer is a low-melting-point coating material. This design endows the material with temperature-triggered intelligent response characteristics: during routine processing and use, the protective layer ensures interface stability and slowly repairs the bonding force; under high-temperature fire conditions, the interface layer rapidly triggers crosslinking to form char, significantly improving flame-retardant efficiency and effectively suppressing melt dripping and the "wick effect." This invention simultaneously achieves high mechanical strength, long-term durability, and inherent flame-retardant safety in the material, making it suitable for high-requirement fields such as electronics, electrical appliances, and new energy vehicles.

The present application relates to a kind of gum repair membranes and its preparation method and application, the gum repair membrane is composed of two outer layers and one inner layer, the inner layer is clamped between two outer layers, form outer-inner-outer three-layer composite structure;The outer layer includes electrospinning fiber membrane and microsphere, the microsphere is loaded on the electrospinning fiber membrane, and the preparation raw material of the electrospinning fiber membrane includes collagen and polycaprolactone;The microsphere includes shell and core, the shell includes temperature-sensitive biodegradable polymer material, the core includes acoustic heat responsive nanoparticle and proangiogenic active polypeptide, and the proangiogenic active polypeptide is neurointermediate U;The core is enclosed in the shell;The inner layer includes polyester electrospinning fiber membrane.The gum repair membrane has ultrasonic response, can time sequence synergistic release acoustic heat nanoparticle and proangiogenic active polypeptide-neurointermediate U, realizes the multiple synergistic treatment of anti-infection, proangiogenic and accelerates tissue regeneration.

This invention provides an ion-doped calcium oxalate thermochemical heat storage material and its preparation method, the chemical formula of which is Ca. 1‑ x M x C2O4·H2O, where M is a dopant ion and x is the mole fraction of the dopant ion; M includes Mg 2+ Co 2+ Zn 2+ 、Sr 2+ One or more of the following. This invention regulates the lattice parameters, local coordination environment, defect state, and microstructure of calcium oxalate by doping with ions. While maintaining the original reversibility and cycle stability of the calcium oxalate system, it further optimizes its dehydration thermal storage temperature range, thermal response boundary, structural evolution behavior, and application compatibility materials, thereby improving the thermochemical thermal storage performance of calcium oxalate from the internal structural level.

This invention relates to a microcapsule modification method based on photocuring and a thermally insulating and corrosion-resistant metal coating prepared based on the microcapsules, belonging to the field of coatings. The microcapsule surface modification method of this invention completes the modification step and microcapsule preparation in one step, simplifying the process; the dispersibility of the modified microcapsules in the resin system is significantly improved. Based on the modification method of this invention, surface-modified microcapsules loaded with corrosion inhibitors and phase transition agents were successfully prepared, effectively improving the performance of the coating. Metal coatings with added bifunctional microcapsules retain their basic properties largely unaffected and exhibit excellent corrosion resistance. Simultaneously, the coating generates a thermal buffering effect, delaying the thermal response and demonstrating effective temperature regulation capabilities, reducing energy consumption, and showing broad application prospects.

The invention discloses an intelligent response type marine antirust agent composition as well as a preparation method and application thereof. The intelligent response type marine antirust agent composition comprises a solvent and the following components in parts by mass: 6-8 parts of ion response microcapsules, 6-8 parts of photo-thermal response microcapsules, 6-9 parts of benzotriazole covalent grafting modified functionalized graphene oxide and 34-38 parts of film-forming resin, a capsule core of the ion response microcapsule is a corrosion inhibitor; the capsule wall is a polyelectrolyte composite membrane formed by self-assembling cationic polyelectrolyte and anionic polyelectrolyte layer by layer, and the outer surface of the capsule wall further comprises an inorganic nanoparticle layer formed by biomimetic mineralization; the cationic polyelectrolyte is poly (diallyldimethylammonium chloride), the anionic polyelectrolyte is sodium polystyrenesulfonate, and the inorganic nanoparticles are calcium carbonate; the photo-thermal response microcapsule comprises a capsule core which is a mixture of CsPbBr and n-octacosane, and a capsule wall which is polyurea formaldehyde.

The application discloses a perfluorohexanone microcapsule fire extinguishing agent based on a complex coagulation method and a preparation method thereof. The fire extinguishing agent is prepared by taking perfluorohexanone as a core material, insoluble complexes formed by a complex coagulation reaction of gelatin and sodium hexametaphosphate at pH 4.0-5.0 as a wall material, and being double-crosslinked and solidified. The application obtains a stable perfluorohexanone emulsion by introducing an emulsifier Span 80 into an emulsified solution of gelatin and perfluorohexanone, and sequentially performs two crosslinking and solidification through glutaraldehyde and resorcinol and formaldehyde after the complex coagulation encapsulation, so that the coating rate, stability, mechanical strength and thermal response sensitivity of the microcapsule are significantly improved. The obtained microcapsule fire extinguishing agent shows excellent flame inhibition and thermal propagation blocking capacity in the simulation of electric meter box fire and lithium ion battery thermal runaway test, can effectively delay the thermal runaway starting time and reduce the peak temperature, and provides a microcapsule fire extinguishing agent which is efficient, stable, safe and has repeated fire extinguishing performance for lithium battery, special electric appliance cabinet, data center and other scenes which need continuous fireproofing / explosion suppression protection.

The present application provides an amphiphilic block polymer nanosphere, a preparation method and an application. The amphiphilic block polymer nanosphere comprises a hydrophobic polymer core, a fluorine-containing crosslinked shell layer covering at least part of the outer surface of the hydrophobic polymer core, and a thermally responsive segment polymer arm and a reactive adhesive segment polymer arm grafted to at least part of the outer surface of the fluorine-containing crosslinked shell layer. The photovoltaic encapsulation adhesive film comprising the amphiphilic block polymer nanosphere of the present application can simultaneously have high adhesion and high barrier properties.

This application discloses a thermoresponsive microcapsule, its preparation method, and a liquid epoxy molding compound. The thermoresponsive microcapsule comprises a core material and a shell material covering the core material. The shell material is polymerized from an isocyanate compound, a thermoresponsive crosslinking agent, and an amine compound. The thermoresponsive functional groups in the thermoresponsive crosslinking agent are introduced into the shell material. By utilizing the thermally ruptured characteristics of these functional groups, the rupture of the shell material is temperature-controlled, thereby achieving temperature-controlled release of the core material. This thermoresponsive core-shell structure can be used to encapsulate accelerators, other water-insoluble compounds, or other highly reactive compounds, thus being compatible with various systems and application scenarios to achieve temperature-controlled triggering.

The invention discloses a quick-response folding unmanned aerial vehicle based on composite material 4D printing. The quick-response folding unmanned aerial vehicle comprises a driving assembly, a folding wing assembly, a supporting and connecting assembly, a power supply assembly and a control assembly. The folding wing assembly is a folding wing manufactured on the basis of composite material 4D printing, the folding wing adopts a shape memory polymer matrix composite material as a base material and is integrally formed through a 4D printing process, and composite material layers with different thermal response characteristics are integrated in the folding wing assembly. Spontaneous folding and unfolding are realized under the stimulation of an external temperature field which is 100 DEG C higher than the glass transition temperature; the driving assembly, the folding wing assembly, the power supply assembly and the control assembly are fixedly installed on the supporting connecting assembly through standard interfaces. According to the invention, the complex terrain operation capability can be greatly improved.

A wafer cleaning device according to an embodiment includes a chamber configured to accommodate a cleaning solution including a thermo-responsive polymer, the chamber having a structure with open top, a head assembly configured to suction one surface of a wafer and move the wafer so that the other surface of the wafer comes into contact with the cleaning solution, and a temperature adjustment unit arranged in the chamber and configured to adjust a temperature of the cleaning solution.

This invention relates to the field of autoclave control technology, specifically to an intelligent control method and device for circulating airflow in an autoclave. It solves the technical problems in existing technologies where the inability to sense the critical compaction state of the material pile and the inability to counteract the gas density effect during pressurization leads to easy channel blockage and secondary compaction when processing loose recycled composite materials. The method includes: acquiring the flow resistance response parameters and thermal response parameters of the material inside the autoclave under multiple different airflow intensities; determining the critical operating condition parameters characterizing the material's impending compaction state based on the correspondence between the flow resistance response parameters and the thermal response parameters; and dynamically adjusting the rotational speed of the circulating fan according to the critical operating condition parameters and the real-time acquired pressure inside the autoclave during pressure changes, so that the airflow load acting on the material remains within a safe range corresponding to the critical operating condition parameters.

The application discloses a new type of hierarchical graphite material and a preparation method thereof. The application grows a three-dimensional graphene network on a foam metal template, removes the foam metal template by using an etching liquid to obtain a three-dimensional porous graphene skeleton; then, a thermoplastic polymer and phase change paraffin are dissolved in toluene to form a responsive phase change solution; subsequently, the solution is immersed into the skeleton in a vacuum environment, and molecules of the phase change material are self-assembled on the surface of the graphene; finally, the final material is obtained by programmed cooling and solidification. Through the synergistic effect of the three-dimensional graphene skeleton, the polymer and the phase change paraffin, the material has high thermal conductivity (≥10.9 W·m ‑1 ·K ‑1 ), fast thermal response (characteristic response time t90≤125 s) and excellent thermal cycle stability (thermal conductivity retention rate≥96% after 1000 cycles), realizes a heat management function, and effectively solves the problem that the traditional material cannot simultaneously have thermal conductivity and temperature control performance.

This invention discloses a method for controlling the gradual change of multilayer composition in a liquid hydrogen pump composite coating, relating to the field of liquid hydrogen pump composite coating control technology, specifically a method for controlling the gradual change of multilayer composition in a liquid hydrogen pump composite coating. The method involves forming a bonding initiation layer on the surface of a liquid hydrogen pump substrate, followed by the sequential formation of multiple transition sublayers and a surface functional layer. After each transition sublayer is formed, a controlled perturbation is applied, and at least two types of post-layer recovery responses are collected from thermal response phase, acoustic response attenuation, and electrical recovery to generate a low-temperature recovery signature. Based on the low-temperature recovery signature, the risk type is determined, and the proportional relationship, layer thickness, and deposition energy of the toughness component, hardness component, and barrier component in the next transition sublayer are adjusted accordingly. The surface functional layer is formed after the low-temperature recovery signature continuously enters the target window, thereby obtaining a nonlinear composite gradient coating. This method is beneficial for improving the interface stability, resistance to cavitation erosion, and hydrogen barrier continuity of the liquid hydrogen pump composite coating.

This invention discloses a method for preparing PBO-based multi-thermal-response sensing fibers and their application in high-temperature early warning. The preparation includes the following steps: S1, preparation of PNF dispersion; S2, preparation of PEDOT:PSS powder; S3, preparation of PEDOT:PSS@Te NWs; S4, preparation of Cs2NaInCl6:Mn 2+ Sb 3+ Preparation of crystals; S5, preparation of sensing fibers. This invention uses poly(p-phenylenebenzodioxazole) (PBO) fiber as the substrate and combines a thermoelectric and thermochromic dual-modal synergistic sensing mechanism, which has excellent flame retardancy, high mechanical strength, ultra-sensitive thermal response, and wide-range visual temperature detection performance.

This invention relates to a liquid metal composite magnetic hydrogel with magnetic and thermal self-healing properties, its preparation method, and its applications. It addresses the problems of poor flexibility, weak electrical and thermal conductivity, and insufficient environmental tolerance in existing hydrogels. The method of this invention comprises the following steps: 1) preparing a liquid metal dispersion; 2) preparing a magnetic precursor system; 3) preparing a carrageenan solution; 4) magnetic field-induced orientation and thermal cross-linking curing; and 5) low-temperature induced formation of a double network. The gel material prepared by this invention exhibits thermal self-healing properties, achieving flame retardancy and self-healing even in extreme environments such as high temperatures and combustion, thereby ensuring the structural integrity and continuous stable function of the material. Simultaneously, by introducing liquid metal, the electrical and thermal conductivity of the gel system is improved, and by introducing magnetic components, it acquires magnetic control capabilities, enabling continuous use in extreme environments.

This application provides a photothermal responsive superhydrophobic anti-icing coating with switchable wetting state and its preparation method, relating to the field of superhydrophobic anti-icing technology. The method involves assembling micron-sized silica microspheres into a single-layer microsphere array template; then filling the template with a mixed solution of resin polymer, phase change material, nano-sized silica microspheres, photothermal material, and acetone. After the acetone evaporates, the silica microspheres are etched to obtain a honeycomb-shaped micro / nano porous membrane storing the phase change material; the porous membrane is then hydrophobically treated to form a superhydrophobic surface. Through this method, this application can utilize the micro / nano porous structure to provide an ideal roughness basis for constructing a superhydrophobic surface; the internal photothermal material gives it excellent photothermal response performance; and by utilizing the heat storage function of the phase change material, it exhibits a superhydrophobic state at low temperatures, delaying icing, and transforming into a slip state for self-de-icing under photothermal triggering, thus achieving a photothermal responsive superhydrophobic anti-icing function with switchable wetting state.

The application relates to the technical field of fireproof plate materials, and particularly discloses a self-expanding fireproof sealing plate, two mutually spliced outer decorative plates and an internal supporting structure cooperatively form a stable initial packaging frame; a plurality of groups of expansion plates rotationally connected at the heads and the tails are uniformly arranged in the circumferences, and cooperate with preset mechanical potential energy of a force storage mechanism to quickly release a deformation driving force when triggered by high temperature, so that the expansion plates are directionally unfolded to the edges of the outer decorative plates. The structure remarkably improves the expansion triggering speed and the direction controllability through a mechanical preloading and thermal response linkage mechanism, overcomes the filling lag and direction disorder problems caused by passive thermal expansion of traditional plate materials, and simultaneously ensures that there is no dead zone coverage at the hole edges due to the circumferential uniform unfolding characteristics, so that the fireproof sealing reliability is greatly improved.

In-situ preparation and application of a thermoresponsive polyether polymer solid electrolyte, relating to a method for preparing a thermoresponsive polyether polymer solid electrolyte and its application in solid-state batteries. This invention utilizes the property of polyethers to depolymerize at high temperatures and repolymerize at low temperatures to achieve interface repair and electrolyte recycling in battery systems. The in-situ preparation and application of the thermoresponsive polyether polymer solid electrolyte of this invention consists of cyclic ethers, crosslinking agents, initiators, lithium salts, plasticizers, and additives. The polyether solid electrolyte obtained by this invention has thermoresponsive characteristics, can repair batteries with interface separation, reconstruct physical contacts, effectively restore and extend battery cycle life; furthermore, the depolymerized cyclic ether monomers can be collected by heating the cycled battery and reused in assembling new batteries. This electrolyte has broad application prospects.

This invention relates to nano-carbonized polymer dots with excellent photothermal properties, their preparation method, and their application in the field of photothermal catalysis, belonging to the fields of nanomaterials and photothermal catalysis. The method involves dissolving citric acid and reduced glutathione in formamide solvent, placing the mixture in a reaction vessel, and dehydrating and condensing the precursor under high-temperature solvothermal conditions. The precursor is then purified by dialysis, filtered, concentrated, and dried to obtain the nano-carbonized polymer dots with excellent photothermal properties. When used in photothermal catalysis of olefin metathesis reactions, under mild white LED or xenon lamp irradiation, ring-closure metathesis, cross-metathesis, and ring-opening metathesis polymerization can be achieved, achieving extremely high conversion rates. Further, through surface acrylylation modification, the nano-carbonized polymer dots are covalently crosslinked to a polydicyclopentadiene network to prepare a nanocomposite photothermal plastic with intrinsic photothermal response. This invention is low-cost, simple to prepare, and the obtained material has broad application prospects in the fields of photothermal catalysis and functional composite materials.

The application discloses a kind of thermochromic materials and preparation method thereof, smart film and smart glass;The thermochromic material includes as follows: organic phase change material, deep eutectic solvent, photo initiator and crosslinking agent;Deep eutectic solvent is composed of hydrogen bond donor and hydrogen bond acceptor;Hydrogen bond donor includes donor I and donor II;At least one of the structural formula of donor I and donor II contains double bond structure;The application provides a novel thermochromic material, the preparation raw material of the material includes organic phase change material and deep eutectic solvent, wherein the first thermal response temperature point is provided by organic phase change material.Deep eutectic solvent provides second thermal response temperature point.Two thermal response temperature is wide.Therefore, the thermochromic material of the application can realize the effect of indoor lighting, shading and temperature adjustment by regulating two thermal response temperature points.

The application discloses a heat-responsive self-stripping peelable film and a preparation method and application thereof, and belongs to the technical field of gamma contamination removal materials. The heat-responsive self-stripping peelable film comprises the following raw materials: porous adsorption material, dispersing agent, film-forming base, surfactant, thickening agent and colorant. When the heat-responsive self-stripping peelable film is used, only the mixed solution needs to be sprayed or brushed on the radioactive contamination area to wait for film formation, and the film can be self-contracted and peeled off by heating. The gamma contamination removal rate of the heat-responsive self-stripping peelable film on a stainless steel surface reaches 80% to 95%, realizes non-contact automatic peeling without human power and machinery, and avoids the radiation of personnel caused by human peeling and the damage of mechanical equipment caused by high-difficulty operation of mechanical peeling.

This invention relates to the field of battery safety technology, and more particularly to a battery module for early thermal runaway protection, its preparation method, and a current collector. This battery module comprises a conductive polymer and a thermally responsive composition. The conductivity of the conductive polymer depends on redox doping. The thermally responsive composition comprises a composite salt and a phase change material. The composite salt is a p-type dopant and an ionic salt formed by thermal dissociation of an alkali with a boiling point of 80–100 °C. The phase change material core material is selected from n-alkanes and / or paraffin waxes with melting points of 80–95 °C, and the shell material is a polymer that softens or weakens in mechanical strength at 80–100 °C. This invention utilizes double insulation to precisely and irreversibly reduce the conductivity of the battery module by at least seven orders of magnitude within 30 seconds, before reaching the initiation temperature of the thermal runaway chain reaction, achieving pre-emptive intervention, significantly delaying the onset of thermal runaway, allowing more reaction time for thermal runaway warning and response, and even preventing the occurrence of thermal runaway altogether.

This invention belongs to the field of polymer materials technology and discloses an oil-resistant modified vulcanized silicone rubber and its preparation process. This preparation process introduces fluorinated ester-type dynamic covalent bonds into the crosslinking network. The material is composed of fluorinated vinyl siloxane copolymers, carboxyl-functionalized siloxane oligomers, and fluorinated silanol crosslinking agents, etc., maintaining excellent oil resistance and high / low temperature resistance while endowing the material with self-healing and hot-press reprocessing capabilities. This invention extends the service life of seals under harsh operating conditions; utilizes the reversible thermal response of dynamic bonds to achieve hot-press reprocessing of the material, making thermosetting rubber recyclable; employs in-situ generation of dynamic crosslinking points to ensure the long-term reliability of the material; and maintains mechanical property balance over a wide temperature range, making it suitable for high-end applications such as aerospace engine seals, new energy vehicle battery pack gaskets, and deep-sea oil drilling equipment seals.