77 results about "Thermosensitive polymer" patented technology

The invention discloses a cement-based aerogel heat preservation and heat insulation coating material for concrete and a spraying construction process of the cement-based aerogel heat preservation and heat insulation coating material, and belongs to the technical field of concrete materials. The coating material is prepared from powder, composite emulsion and water, and the powder is prepared by mixing superfine sand, cement, modified silicon dioxide-carbon nanotube composite aerogel powder, hollow glass beads, nanofibers, graphene nanosheets, an ultraviolet light absorber, a water reducing agent and a defoaming agent. The composite emulsion is composed of an acrylate copolymer emulsion, a polyvinyl acetate-ethylene emulsion, a temperature-sensitive polymer emulsion and a coalescing agent. Based on the multi-stage pore network and multi-component emulsion optimization design and multi-component synergistic effect, the material has good fluidity after being mixed, and has low heat conductivity coefficient, high strength and high toughness after being hardened; the construction technology of high-pressure water flushing and layered spraying is provided, and the method has the advantages of being efficient in construction, stable in quality and the like and can be applied to heat preservation and heat insulation of a concrete structure in a severe environment.

The invention relates to the technical field of biological induction of calcium carbonate deposition, in particular to self-repairing concrete for biological induction of calcium carbonate deposition and a preparation method thereof. The cement comprises the following components in parts by weight: 320-380 parts of Portland cement and the like. The biomineralization composite inducer contains a genetically engineered bacterium solution, a urea-calcium chloride solution and a nano strontium carbonate seed crystal; the nano silicon dioxide-graphene composite powder is prepared by chemical vapor deposition; the wall material of the double-response microcapsule contains a temperature-sensitive polymer, and the core material contains a plurality of components; nanocellulose whiskers are also added; self-repairing is achieved through cooperation of multiple components, and all the components are specially treated or prepared. The self-repairing concrete is high in self-repairing efficiency, and wide cracks can be repaired; the mechanical property is excellent, and the compression strength and the breaking strength are remarkably improved; working performance is good, and construction is convenient; durability is good, and erosion and permeability are resisted; environmental protection and economy are considered, and the application prospect is wide.

The invention relates to the technical field of waterproof coatings, in particular to a polyurethane waterproof coating and a preparation process thereof. The polyurethane waterproof coating is prepared from the following raw materials: toluene diisocynate, polyether polyol, chlorinated paraffin, talcum powder, a latent curing agent, self-repairing microcapsules and temperature-sensitive polymer nanoparticles. According to the self-repairing capsule, hexamethylene diisocyanate serves as a core material, the outer layer of the self-repairing capsule is wrapped with a polyurethane / nano-silicon dioxide hybrid wall material or a urea-formaldehyde resin wall material, and the temperature-sensitive polymer nanoparticles are poly N-isopropylacrylamide. The self-repairing microcapsules and the temperature-sensitive polymer nanoparticles are used, the self-repairing capacity and the capacity of adapting to different environmental conditions of a coating film are improved, when tiny cracks occur in the coating film, the microcapsules are broken to release a repairing agent, the cracks are automatically filled, the integrity of the coating is recovered, and the self-repairing performance of the coating film is improved. And the temperature-sensitive polymer nanoparticles can expand when the temperature rises to further promote the flowing and curing of the repairing agent, so that the service life of the coating film is prolonged, and the maintenance cost is reduced.

Disclosed herein is a pressurized therapeutic composition configured to be stored in a valved container designed to maintain an inverse thermosensitive polymer foam composition under pressure and dispense the composition upon opening the valve thereof. After the composition is dispensed from the container the evaporation of an expanding component (e.g., compressed gas or volatile liquid) can cause the inverse thermosensitive polymer solution to foam. The reduced pressure produced from dispensing the inverse thermosensitive polymer solution can reduce its temperature so as to facilitate distribution in a more liquid foam form. The inverse thermosensitive polymer solution can undergo a reverse phase change from a liquid to a gel upon warming (e.g., once dispensed onto or into a body part).

The invention discloses a reversible thermosensitive polymer functional dye and a preparation method thereof, and belongs to the technical field of thermosensitive color-changing dyes, the reversible thermosensitive polymer functional dye comprises a color-changing core material and a transparent microcapsule, and the transparent microcapsule coats the color-changing core material. The color-changing core material is prepared from the following components: 8 to 12 parts of color-changing dye ODB, 15 to 28 parts of a color developing agent BFPA, 210 to 400 parts of a solvent benzyl phenyl ether, 6 to 15 parts of an antioxidant, 125 to 220 parts of montmorillonite subjected to surface treatment by an organosilane modified organic cationic surfactant, 56 to 82 parts of a nonionic polymer suspending aid and 5 to 12 parts of an ultraviolet light absorber; the capsule wall of the transparent microcapsule is prepared from a transparent polymer. The reversible thermosensitive polymer functional dye can improve the acting force of a color developing agent BFPA and a solvent benzyl phenyl ether, so that a complex of BFPA and thermosensitive black ODB is separated as soon as possible, and the color contrast of the reversible thermosensitive polymer functional dye in two states of color development and decoloration is improved.

The invention discloses a solid acid catalyst for synthesizing cyclic peroxide and application of the solid acid catalyst, and belongs to the technical field of catalytic synthesis. The solid acid catalyst has a core-shell structure, and the core-shell structure sequentially comprises the following components from inside to outside: a) a core: ZSM-5 zeolite, the surface of which is grafted with an amino group, and the aperture of which is 0.54-0.58 nm; b) an intermediate layer: a phosphorylated titanium dioxide layer containing Ti-O-P bonds; and c) a shell: a nitrogen-doped sulfonated carbon layer, the surface sulfonic group density is 1.6 mmol / g-1. 8mmol / g, a temperature-sensitive polymer network is grafted in the shell layer, and the tail end of the temperature-sensitive polymer network is modified with a sulfonic group. The problems of harsh reaction conditions, low product purity, poor catalyst stability and insufficient environmental friendliness in the prior art are solved.

The invention discloses a core-shell nano-enzyme composite spray gel dressing and a preparation method and application thereof.The dressing comprises a component A prepared from sodium alginate, N-isopropylacrylamide PNIPAM, core-shell nano-enzyme and curcumin and a component B of a divalent metal salt solution, and the component A and the component B are sprayed at the same time to form the core-shell nano-enzyme composite spray gel dressing. The preparation method of the core-shell nano enzyme comprises the following steps: mixing potassium ferrocyanide, ferric trichloride and polyvinylpyrrolidone to obtain a Prussian blue nano particle precursor solution; carrying out ultrasonic emulsification treatment and replacement on the curcumin core solution and the Prussian blue nanoparticle precursor solution; and freeze-drying to obtain the core-shell nano-enzyme. Through rapid ionic crosslinking of sodium alginate and divalent metal ions and the temperature-sensitive phase change characteristic of the temperature-sensitive polymer poly (N-isopropylacrylamide), the gel dressing is rapidly formed, the damaged skin is effectively covered and protected, the excellent antioxidant, anti-inflammatory and antibacterial capabilities are achieved, and the healing cycle of the radiodermatitis wound can be remarkably shortened.

The present invention relates to the field of material drying technology, and discloses a dehumidification plate, dehumidification device, and drying system based on metal-organic framework materials. The metal-organic framework-based dehumidification device plate of the present invention comprises a plate body and a frame. The plate body is made of a metal-organic framework material doped with a low critical solution temperature thermosensitive polymer. The plate body is arranged upright and provided with a drainage channel. The drainage channel converges and connects from the upper end of the plate body to the lower end of the plate body, and the lower end of the drainage channel is provided with a water outlet. The frame is disposed within the plate body and is capable of supporting the plate body. The dehumidification device plate can remove moisture from the exhaust gas of the drying material, allowing the exhaust gas to circulate waste heat, improve thermal efficiency, and reduce energy consumption for drying material regeneration or water vapor condensation.

Disclosed is a modified polymer obtained by enclosing and / or grafting a non-thermosensitive polymer particle with a thermosensitive polymer, the modified polymer has a viscosity exhibiting a significant change at 40 to 90℃. Also disclosed is a polymer having a core-shell structure, wherein the core particle consists essentially of a non-thermosensitive polymer, and the shell is located on the outer surface of the core particle and consists essentially of a segment derived from a thermosensitive polymer, the polymer has a viscosity exhibiting a significant change at 40 to 90℃. Further disclosed is a method for preparing an aqueous dispersion of polymer. Still further disclosed is a coating composition comprising the above modified polymer, the above polymer, or the above aqueous dispersion of polymer, a substrate coated with the coating composition, as well as use of the modified polymer, the polymer, or the aqueous dispersion of polymer.

The invention discloses a photobleached all-polymer optical waveguide grating sensor and a preparation method thereof, and belongs to the technical field of polymer optical waveguide grating sensors. The preparation method comprises the following steps: carrying out hot stamping on a substrate sheet to obtain a substrate sheet with a groove; spin-coating photoresist on the substrate sheet to form a photoresist core layer; photoetching the photoresist core layer through double-beam interference to obtain the photoresist core layer with interference fringes; spin-coating a thermosensitive polymer cladding material on the photoresist core layer, covering the flexible substrate and then carrying out low-temperature thermocuring so as to bond the photoresist core layer and the flexible substrate; stripping the substrate sheet, exposing the photoresist core layer, covering the protective cladding, and curing to obtain a multi-layer composite device; and performing non-uniform post-baking on the multi-layer composite device to obtain the multi-layer composite device. According to the invention, the grating period can be changed under the condition that the grating mask is not replaced, and the cost of spectrum adjustment is greatly reduced.

Provided in the present application are a composite electrode active layer, an electrode sheet and a secondary battery. The composite electrode active layer comprises an active material layer and a composite insulating layer which are stacked in sequence, wherein the composite insulating layer comprises inorganic particles, a heat-resistant polymer and a thermosensitive polymer; the weight ratio of the inorganic particles to the heat-resistant polymer to the thermosensitive polymer is (50-100):(1-10):(5-50); the melting temperature of the heat-resistant polymer is 180-450ºC; and the softening temperature of the thermosensitive polymer is 80-120ºC.

This invention discloses a method for preparing a thermosensitive hemostatic gel, which is prepared by mixing a thermosensitive polymer solution with a solution of micron-sized polymer particles or microspheres with hemostatic function. The concentration of the solution of micron-sized polymer particles or microspheres with hemostatic function is 3-100 mg / mL; the concentration of the thermosensitive polymer solution is 200-450 mg / mL; the diameter of the micron-sized polymer particles or microspheres with hemostatic function is 300-900 micrometers; the gelation temperature of the thermosensitive hemostatic gel from a flowing liquid state to a solid state is greater than 15 degrees Celsius, and it is a flowing liquid state at temperatures below 15 degrees Celsius. Under the condition of warming up in response to the human body temperature, the flowing liquid hemostatic gel transforms into a solid hemostatic gel, thereby achieving the hemostatic function. The micron-sized polymer particles or microspheres in the thermosensitive hemostatic gel will not enter the damaged blood vessel during the hemostasis process.

This invention discloses a porous carbon-based dual-drug-loaded nanomaterial for sustained release. The material uses a thermosensitive polymer as a matrix and cellulose nanocrystals modified with cationic surfactants as a reinforcing phase, loading both hydrophilic and hydrophobic drugs. This material can be used to prepare therapeutic drugs for gynecological diseases and infertility, as well as drug delivery devices. Furthermore, this invention provides a uterine scaffold prepared using this material, which can be fabricated using 3D printing technology. Utilizing the PNIPAm hydrogel network and its temperature-responsive properties, hydrophilic drugs can be loaded at low temperatures. The high mechanical strength of CNC machining allows for the loading of hydrophobic drugs while improving the mechanical properties of the hydrogel matrix, thus solving the problems of easy detachment and bleeding in existing technologies.

The invention discloses a battery diaphragm and a secondary battery, and belongs to the technical field of batteries. The battery diaphragm provided by the invention comprises a base membrane and a thermosensitive coating laminated on the surface of at least one side of the base membrane, wherein the thermosensitive coating comprises the following components in percentage by mass: 20-50% of thermosensitive polymer and 45-80% of inorganic particles; a synthetic monomer of the thermosensitive polymer is selected from at least one of the following monomer compounds: at least one of a non-fluorine alkenyl monomer, an alkylene monomer, an unsaturated nitrile monomer, an olefine acid monomer and an ester monomer; the average particle diameter of the inorganic particles is 0.1 [mu] m to 10 [mu] m, and the Mohs hardness of the inorganic particles is 2.0 to 5.0. The thermal sensitive polymer and the inorganic particles in the thermal sensitive coating have a synergistic effect, so that the battery diaphragm not only has a thermal hole closing function, but also has high heat resistance, the thermal shrinkage rate of the battery diaphragm at a high temperature is reduced, and meanwhile, the puncture strength of the battery diaphragm is also improved.

The present application relates to the technical field of adhesives, and in particular to a medical tissue adhesive and a preparation method thereof. The medical tissue adhesive comprises the following raw materials in parts by weight: 8-12 parts of a polyglutamic acid grafted thermosensitive polymer, 0.8-1.2 parts of vitamin C, 0.8-1.2 parts of sodium periodate, 0-1.2 parts of sodium alginate, 0-1.2 parts of chitosan oligosaccharide, and 2.5-3.5 parts of polyethylene glycol; the polyglutamic acid grafted thermosensitive polymer is prepared by reacting polyglutamic acid and a thermosensitive polymer containing an acid anhydride, and the temperature-sensitive polymer is prepared by copolymerizing an acid anhydride containing a double bond, N-vinyl pyrrolidone, and N-isopropylacrylamide; the medical tissue adhesive has the advantages of improving the hemostatic effect and adhesion of the medical adhesive.

We utilize high-quality-factor (high-Q) metasurfaces patterned either in or adjacent to electro-optical or thermo-optical materials such as lithium niobate, barium titanate, or thermally-sensitive polymers. The metasurface includes nanoantennas that act as dipole emitters; the particular structure and arrangement of nanoantennas can steer light to particular directions or focus light, The electromagnetic metasurface supports one or more guided mode resonances. The metasurface also includes a perturbation superposed on the metasurface features and configured to couple free-space radiation to the guided mode resonances.

The invention discloses thermo-sensitive polymer hydrogel as well as a preparation method and application thereof, and the polymer hydrogel comprises a temperature response type polymer monomer, cement hydration product nanoparticles and an initiator. The polymer hydrogel disclosed by the invention has excellent compressive strength and biocompatibility, so that cells can well grow and adhere to the polymer hydrogel; the polymer hydrogel also has drug loading and rapid drug release properties, and lays a foundation for the gel as a wound dressing.

The invention discloses a battery diaphragm, a preparation method thereof and a secondary battery, and belongs to the field of secondary batteries, and the battery diaphragm comprises a base membrane, a nanofiber layer and a thermosensitive layer which are stacked in sequence. The base film is prepared from polyethylene with the molecular weight of 1.5 million to 3 million. The thermosensitive layer comprises 5-10 parts of a thermosensitive polymer, 15-20 parts of first inorganic particles, 0.05-0.1 part of a first dispersing agent, 0.3-0.5 part of a first thickening agent, 2-5 parts of a first binder and 0.05-0.1 part of a first wetting agent, and the thermosensitive polymer is selected from polyethylene wax and / or an ethylene copolymer. The nanofiber layer comprises nanocellulose and second inorganic particles, and the nanocellulose is selected from at least one of cellulose microfibrils, nanocellulose crystals and bacterial nanocellulose; the inorganic particles are selected from at least one of boehmite, aluminum oxide, magnesium hydroxide, barium carbonate, magnesium carbonate and zirconium oxide. The diaphragm has low-temperature closed pores and high-temperature dimensional stability.

A system for implantation by sterilisation techniques. A sterile implantation system comprising a heat-sensitive polymeric matrix that modifies its structure in the presence of a compressed gas or supercritical fluid to produce a solid or semi-solid with porosity greater than 60%.

The application provides a heat-closed pore separator based on a surface grafting strategy and a preparation method and application thereof, and belongs to the technical field of lithium ion battery separator materials.The application forms a polydopamine modification layer on the surface of a polyolefin film, introduces a bromine initiator on the surface of the polydopamine modification layer, obtains the polyolefin film containing the bromine initiator on the surface, grafts a heat-sensitive polymer layer on the surface of the polyolefin film containing the bromine initiator, and obtains the heat-closed pore separator based on the surface grafting strategy.The heat-closed pore separator based on the surface grafting strategy can improve the safety performance of the battery while maintaining the electrochemical performance of the battery, the heat-closed pore separator can realize the heat-closed pore function at high temperature, the battery can operate at a safe temperature, and the heat runaway phenomenon caused by overheating of the battery can be effectively prevented.

The invention discloses a grafting method with a high survival rate of Pinus sylvestris var. mongolica grafted onto Pinus koraiensis in arid areas, comprising: selecting a Pinus sylvestris var. mongolica rootstock with a growth period of 4-6 years, flatly cutting below the terminal bud branch point to form a cross section, obliquely cutting two knives downward from the cross section to form a triangular pyramid-shaped mosaic structure, intercepting a semi-lignified Pinus koraiensis scion with a terminal bud, retaining the main bud and removing the lateral buds, obliquely cutting two triangular xylem sections from below the spore to form a double-bevel wedge-shaped joint body; when cutting the stock and the scion, immersing the cutting blade in an aqueous solution containing a plant growth regulator and a bactericide; inserting the double-bevel wedge-shaped joint body into the triangular pyramid-shaped mosaic structure so that the scion pith layer overlaps the stock pith layer; wrapping the interface with a composite hydrogel film comprising a thermosensitive polymer and an antibacterial component; and performing light shading after the grafting is completed. The present invention can significantly improve the survival rate of grafted seedlings.

The invention provides a secondary battery, a preparation method thereof and electric equipment. The secondary battery comprises one or more battery cells, the battery cell comprises a negative pole piece; the negative pole piece comprises a microcapsule; the microcapsule comprises an inner core and a shell layer arranged on the surface of the inner core; the inner core comprises a polymer, a lithium salt and chain carbonate; the shell layer comprises at least one of an organic piezoelectric material, a thermosensitive high polymer material and an acid response type high polymer material; the secondary battery satisfies at least one of the following conditions: 1) the piezoelectric constant d33 of the organic piezoelectric material is 10-50 pC / N; 2) the glass transition temperature of the thermosensitive polymer material is 50-100 DEG C, and 3) the acid response type polymer material comprises an acidolysis material which is degraded when the acid concentration is 3-120 ppm. The secondary battery provided by the invention has the advantages of less electrolyte consumption, good cycle performance and small internal resistance.

This invention discloses a supersonic drying system and dehydration method for particles, relating to the field of particle drying technology. The system includes a collection cylinder fitted outside an accelerating cylinder. By guiding thermosensitive polymer particles into a vortex flow field, they are suspended and spirally ascended under the dynamic balance of centrifugal force and airflow drag. The low-pressure environment generated by the vortex flow field lowers the boiling point of water on the particle surface, and combined with a heat-generating unit, moisture evaporation can be achieved at a relatively low temperature. Subsequently, a high-energy electron beam excited by a plasma generator promotes the migration and evaporation of moisture from the particles, enhancing the drying effect. After dehydration, the particles automatically detach from the vortex flow field due to density changes and enter the collection zone, while the nitrogen flow carries the evaporated water vapor into the discharge zone, achieving automatic separation of the particles and the nitrogen flow. This invention, through its unique structural design and particle motion drying process, is suitable for thermosensitive polymer particles, avoiding thermal degradation and achieving highly efficient particle drying.

A method for producing a nickel-phosphorus coating on a laminate comprising a heat-sensitive polymer substrate and an aluminum layer.

The present invention discloses a preparation method and application of thermosensitive methylated chitin. First, chitin is dissolved in an alkali / urea or alkali solution, and a methylation reagent is added to the chitin aqueous solution at a low temperature, followed by mixing and stirring for reaction. Then, it is neutralized with acid, dialyzed, and freeze-dried to obtain thermosensitive methylated chitin. The preparation process of this method is simple, the reaction conditions are mild, and the gel transition point of the product is in the range of 15 to 85 °C. Among them, the methylated chitin with a low transition temperature can be used as an injectable hydrogel and a drug carrier material. The methylated chitin with a high transition temperature can effectively increase the resistance during the thermal runaway of the aqueous battery, playing a role in thermal self-protection. Moreover, compared with common synthetic polymer thermosensitive polymer materials, methylated chitin can form a stable gel with a polymer concentration as low as 1 wt% to 3 wt%. At the same time, methylated chitin has better degradation performance, does not use organic additives, and is more environmentally friendly when the aqueous battery is discarded.

This invention relates to an ultrafast intelligent fungal capture agent, which is a core-shell nanostructure. The core is a magnetic nanoparticle, and the shell is a thermosensitive polymer. The surface of the thermosensitive polymer is coupled with substances that specifically bind to fungi. This ultrafast fungal capture agent exhibits rapid capture speed, successfully isolating approximately 75% or more of the fungi, which can then be immediately detected using SERS. The preparation method of this fungal capture agent is simple and mild, allowing for repeated recycling using an external magnetic field, and the fungal capture capacity remains largely unchanged. It is significantly economical for industrial applications and suitable for large-scale use. This fungal capture agent possesses intelligent capture and release behavior. By controlling the temperature, an intelligent and efficient fungal capture-detection process can be completed, reducing the entire process time to within 10 minutes, thus improving diagnostic speed and reducing patient mortality.

The invention belongs to the technical field of medical materials, and particularly relates to a drug-loaded porous magnesium alloy bone scaffold and a preparation method thereof.The drug-loaded porous magnesium alloy bone scaffold is prepared from, by mass, 55 parts of magnesium alloy, 6-10 parts of corrosion-resistant matter, 1 part of drug-loaded gel, 2-4 parts of antibacterial bone promoting matter and 3 parts of gelatin; the magnesium alloy is made into a micro tube, and the micro tube is filled with the drug-loaded hydrogel to realize drug sustained release; gelatin is sprayed on the surface, corrosion-resistant materials are attached through Mg-N coordinate bonds, hot pressing is carried out, and components of the corrosion-resistant materials and the gelatin form an interpenetrating network to enhance combination and react with the magnesium alloy to form a protective film. Meanwhile, Ca < 2 + > initiates crosslinking of sodium alginate to form a stable corrosion-resistant barrier; and finally, an antibacterial bone-promoting mixed solution containing modified chitosan and a temperature-sensitive polymer is sprayed, bone-promoting components are uniformly dispersed around the implant through a complex reaction and temperature control, and tissue compatibility is improved.

The present invention provides a kind of thermosensitive cell microcarrier and preparation method thereof, and the method for culturing cells. The preparation method provided by the present invention, using glass microspheres as basic materials to carry out surface hydroxylation, then aminosilane coupling agent is used to carry out amino modification, then the N-carboxylic acid anhydride (NCA) of glutamic acid modified by propargyl alcohol is polymerized on the surface of glass microspheres, and finally click chemistry reaction is carried out with azido oligoethylene glycol to obtain a surface-covered thermosensitive polymer glass microsphere with good cell compatibility. The thermosensitive cell microcarrier prepared by the present invention has extremely low cytotoxicity and good biosafety; moreover, it has thermosensitive performance, can achieve efficient cell adhesion and detachment, and effectively detaches cells in a low temperature environment; when it is used as a carrier to culture cells, three-dimensional space is provided to cell growth, and compared with a two-dimensional plane, cell amplification can be achieved, the cost of cell culture is reduced, and the effect of protecting cell surface proteins is possessed.

The invention discloses an acrylic plate with temperature-sensitive heat-sensitive performance and a preparation method thereof, and relates to the technical field of compositions of temperature-sensitive heat-sensitive high-molecular compounds. The acrylic plate is prepared from the following raw materials in parts by mass: 60-90 parts of matrix resin, 5-30 parts of a thermosensitive color-changing material, 0.5-5 parts of a light stabilizer, 3-15 parts of a toughening agent and 0.1-2 parts of a processing aid. Through the synergistic effect of the specific light stabilizer, the flexibilizer and the processing aid, the inherent high transparency of the acrylic plate is effectively maintained, the good mechanical property of the material is ensured, and the defects of transparency reduction, brittleness increase and the like which are often caused by addition of a heat-sensitive material are overcome. The selected light stabilizer with a special structure remarkably improves the ultraviolet degradation resistance of the material, and effectively prevents yellowing, embrittlement and discoloration performance degradation of the material in long-term use or outdoor environment, thereby prolonging the service life of the product and improving the reliability of the product.