405 results about "Thermo responsive" patented technology

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 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 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.

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 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.

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 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 discloses a preparation method of photo-thermal driven liquid metal microsphere-polymer shape memory fibers, which comprises the following steps: compounding liquid metal microspheres LMP with waterborne polyurethane WPU to form coating slurry with photo-thermal response capability, uniformly coating the surface of thermoplastic polyurethane / polycaprolactone TPU / PCL shape memory fibers prepared by a wet spinning process with the coating slurry, and carrying out photo-thermal driving on the surface of the TPU / PCL shape memory fibers to obtain the photo-thermal driven liquid metal microsphere-polymer shape memory fibers. And the TPU-PCL / LMP-WPU composite fiber with the photo-thermal response capability is obtained. The method has the advantages that illumination or near-infrared laser is applied to serve as an activation source, non-contact heating is achieved, and fiber deformation can be driven within a short time to complete anti-fake recognition.

The invention discloses thermal stimulation response hydrogel and a preparation method thereof, and belongs to the technical field of high polymer materials. The preparation method comprises the following steps: dissolving acryloyl valine, acrylamide, methylene bisacrylamide and a photoinitiator in an organic solvent, and defoaming to obtain a precursor solution; and S2, putting the precursor solution into a mold, carrying out ultraviolet light-induced curing, soaking the obtained hydrogel in an acid solution, replacing the organic solvent, and then carrying out heat treatment to obtain the thermal stimulation response hydrogel. Compared with other existing thermal response type hydrogel, the thermal response type hydrogel has the advantages that the fracture stress, the modulus, the tensile work and the like are remarkably improved in the order of magnitude level, and excellent comprehensive mechanical properties are shown. The thermally-induced hardening hydrogel developed by the invention has a wide application prospect in the field of engineering devices requiring higher modulus and requiring significant change of mechanical properties before and after heating.

The invention provides a thermal response glass ceramic repairing agent based on microcapsule packaging, a preparation method of the thermal response glass ceramic repairing agent, an application of the thermal response glass ceramic repairing agent in self-repairing of an SOFC electrolyte and a solid oxide fuel cell. The repairing agent comprises a nano-porous Al2O3 microcapsule and a glass ceramic repairing agent packaged in the nano-porous Al2O3 microcapsule, the glass ceramic repairing agent comprises a low-temperature flowing glass phase and an ionic conductive ceramic phase, when the electrolyte crack expands, the microcapsule is broken to release the repairing agent; the glass phase melts and flows at the running temperature of the SOFC to fill cracks, and then is crystallized to form MgAl2O4-CeO2 composite ceramic compatible with electrolyte, and a compact structure is recovered. Compared with the prior art, the repairing agent disclosed by the invention is compatible with an SOFC electrolyte material, can trigger repairing at an operating temperature, adopts a microcrack self-repairing technology which does not damage an electrode layer, can realize real-time repairing without shutdown, and can automatically trigger repairing after cracks are generated.

The invention discloses a robot simulation skin and a preparation method of the robot simulation skin. The formula of the robot simulation skin is composed of 100 parts of an organosilicon polymer with a main chain containing double bonds, 30-45 parts of a hyperbranched phenyl silicone oil plasticizer, 5-18 parts of a nanoscale texture conditioning agent, 7-22 parts of a dynamic crosslinking system and 1.5-9 parts of a function response additive. Through cross-scale cooperation of an organosilicon polymer matrix and functional components, a conformational entropy buffer network of a hyperbranched plasticizer is constructed on a molecular level, a light-force energy flow channel decoupling mechanism of a core-shell regulator is formed on a mesoscopic level, space-time regulation and control of gradient crosslinking and photo-thermal response are realized on a macroscopic level, and meanwhile, the cross-scale cross-linked hyperbranched polymer has good application prospects. The physical essence of inherent contradictions of'high-temperature softening-low-temperature embrittlement 'and'light transmittance-elasticity mutual exclusion' of existing silica gel skin is broken through, and the sensitivity of conformation entropy change to temperature is reduced through the molecular topology confinement effect.

The invention discloses a silicon-based thermal response viscosity-reducing film synergistically-enhanced bending-resistant folding OCA (Optically Clear Adhesive) and a processing technology thereof, and mainly aims to provide the silicon-based thermal response viscosity-reducing film synergistically-enhanced bending-resistant folding OCA and the processing technology of the silicon-based thermal response viscosity-reducing film synergistically-enhanced bending-resistant folding OCA. Comprising a flexible substrate layer, a first bonding layer, a thermal response viscosity-reducing film layer, a second bonding layer and a functional OCA main body layer which are arranged in sequence, the flexible substrate layer is composed of a transparent polyimide compound; the first bonding layer is made of modified organic silica gel; the thermal response viscosity reducing film layer is composed of a silicon-based material and thermal response microspheres; the second bonding layer is made of modified organic silica gel which is the same as that of the first bonding layer; and the functional OCA main body layer is made of a polyurethane-organic silicon hybrid material. According to the technical scheme, the bending strength and the performance stability of the OCA used by the folding screen can be effectively improved.

The invention relates to a cross-scale thermal response self-repairing polyurethane material as well as a preparation method and application thereof, and belongs to the field of self-repairing polyurethane materials. A pyridine group is introduced into a main chain of the polyurethane material to form a reversible coordination bond with metal salt, so that molecular-scale self-repairing is realized, and the dynamic property of the coordination bond can be enhanced by a preferable double-metal synergistic system; a side chain is designed to be of a furan-maleimide structure based on a Diels-Alder reaction, thermal response macroscopic self-repairing performance is given to the material, a methyl substituted furan group is introduced to improve steric hindrance, and the high-temperature application scene can be expanded. The polyurethane material has a thermal response and metal coordination dual self-repairing mechanism, and is suitable for polymer protection and repairing application under severe working conditions of high temperature, high ion concentration and the like.

The invention discloses bamboo-based fire extinguishing gel as well as a preparation method and application thereof, and belongs to the technical field of macromolecular flame-retardant materials. The technical problem to be solved is to solve the problems of fire risk caused by vibration in the transportation process of the lithium ion battery and extremely high ignition speed, long combustion duration, extremely high combustion temperature, high re-combustion risk, generation of poisonous gases such as carbon monoxide and the like, serious harm to human health and the like caused by fire of the lithium ion battery. The invention provides the bamboo-based fire-extinguishing gel with dual purposes, and the bamboo-based fire-extinguishing gel not only has good damping performance and thermal responsiveness, has excellent adhesiveness and coverage after being liquefied, but also can absorb a large amount of heat and reduce the temperature, and has the advantages of efficient fire-extinguishing performance, environmental friendliness and the like. According to the technical scheme, the bamboo-based fire extinguishing gel is characterized by being prepared from water, bamboo powder, urea, glycerin, carrageenan and hydroxypropyl methyl cellulose.

The invention discloses an organic boric acid compound with a thermal response behavior and a membrane material prepared from the organic boric acid compound, and relates to the technical field of thermal response intelligent covalent organic polymer membranes. According to the organic boric acid compound, condensation is induced through vacuum dehydration of boric acid groups in a molecular structure, a boron-oxygen-six-ring cross-linked network can be constructed on the surface of a membrane, and the thermal response behavior is achieved. The network has a clear UCST type thermal response mechanism, when the temperature is lower than the cloud point temperature, the compound forms a stable aggregate, so that the membrane surface presents a specific pore structure and surface characteristics, when the temperature is higher than the cloud point temperature, the aggregate is dissociated into a monomer, the hydrophilicity and hydrophobicity and pore size of the membrane are dynamically adjusted, and the membrane surface has a specific pore structure and surface characteristics. The thermal response behavior derives from conformational change driven by intramolecular hydrogen bonds, complex polymer synthesis steps are not needed, temperature regulation and control of membrane performance can be achieved only through micromolecule self-assembly, and a simple and environment-friendly technical path is provided for preparation of a thermal response membrane material.

The invention discloses a composite electrolyte and a preparation method and application thereof. The composite electrolyte comprises a lithium salt, a solvent, a Lewis acid precursor, a Lewis acid trapping agent and a thermal response monomer, the mass content of the Lewis acid precursor is 0.1-5%, the mass content of the Lewis acid trapping agent is 2-5%, and the mass content of the thermal response monomer is 5-30%. The composite electrolyte can be rapidly polymerized at high temperature, so that the thermal stability of the electrolyte is improved, an ion transmission path is cut off, meanwhile, the composite electrolyte can be stably kept in a liquid state in a non-high-temperature environment, the electrochemical performance of the composite electrolyte is not influenced, and the composite electrolyte can be compatible with various storage and use environments; the problems of gas production and fire in the thermal runaway process of the battery can be remarkably inhibited, the safety of the battery is improved, and the electrical performance of the battery in a normal operation state is not influenced.

The invention relates to the technical field of antibacterial materials, and provides a light-enzyme-heat synergistic antibacterial nano composite material and a preparation method thereof.The preparation method comprises the steps that 1, a copper-based chalcogenide with a plasma resonance effect serves as a structural template, a transition metal oxide intermediate layer and a bismuth oxyhalide epitaxial layer are sequentially constructed on the surface of the copper-based chalcogenide with the plasma resonance effect through a step-by-step continuous solvothermal method, and the copper-based chalcogenide with the plasma resonance effect serves as the structural template; forming a core-shell heterojunction with Z-type energy band matching; (2) pre-assembling a natural enzyme and a monatomic nano-enzyme in a buffer system to form a composite catalytic unit with an electron transfer channel; and (3) by taking the core-shell heterojunction as a polymerization core, under the precise temperature control condition of 0-10 DEG C, initiating active free radical polymerization through an interface, constructing a thermal response polymer shell layer on the surface of the heterojunction, and encapsulating the composite catalytic unit in a functional microdomain of a polymer network in situ. The anti-bacterial fabric can achieve a better synergistic anti-bacterial effect.

One embodiment relates to an orthopedic precast that, upon an application of heat of a prescribed level while the orthopedic precast is worn adjacent to a targeted body part of the patient, transitions into an orthosis that conforms with the body part. The orthopedic precast includes a first portion and an interconnect. The first portion is formed of interwoven strands of a first thermoplastic material having a first melting temperature. These interwoven strands forming a pathway within the first portion. The interconnect is positioned within the pathway, wherein the interconnect is configured to receive power and radiate heat based on current flowing through the interconnect. Responsive to the interconnect supplying radiating heat of at least the first melting temperature, the first thermoplastic material partially melts and, upon subsequent cooling, the first portion transitions from flexible material into a rigid structure of the orthosis.

The invention discloses a composite yarn with color-changing and anti-cutting functions as well as a preparation method and application of the composite yarn. The composite yarn sequentially comprises an anti-cutting layer, a stainless steel fiber layer and a color-changing layer, the anti-cutting layer takes ultra-high molecular weight polyethylene filaments as core yarn, and two layers of para-aramid filaments are wrapped outside the anti-cutting layer; the stainless steel fiber layer is formed by wrapping a single stainless steel fiber on the anti-cutting layer; and the color-changing layer is formed by coating two or more thermochromic fibers with four primary colors of red, green, yellow and blue outside the stainless steel fiber layer. The ultra-high molecular weight polyethylene filament is used as a core yarn and is coated with two layers of para-aramid filaments to form an anti-cutting layer; wrapping stainless steel fibers to form a stainless steel fiber layer; the stainless steel fiber layer is coated with thermochromic fibers; the method is applied to the functional fabric. The functional composite yarn can passively make thermal response under the change of external temperature, can also actively change color after being powered on, is used for bag bodies, garment materials and the like after being made into fabric, and has high performance and fashionable appearance.