228 results about "Thermo responsive" patented technology

The invention relates to materials comprising polymer network containing siloxanes or organic-based core structures, preferably the materials have thermal-responsive properties. In some embodiments, the invention relates to an organic core functionalized with polymers. In another embodiment, organic core-polymer conjugates comprise polylactone segments. The organic core-polymer conjugates may be crosslinked together to form a material, and these materials may be functionalized with bioactive compounds so that the materials have desirable biocompatibility or bioactivity when used in medical devices. In some embodiments, the invention relates to silsesquioxane groups functionalized with polymers. In another embodiment, silsequioxane-polymer conjugates comprise polylactone segments. The silsequioxane-polymer conjugates may be crosslinked together to form a material, and these materials may be functionalized with bioactive compounds so that the materials have desirable biocompatibility or bioactivity when used in medical devices. In further embodiments, the invention relates to composite materials that contain a polymer matrix and aggregates, and in some embodiments, methods of making, and methods of using these materials. Preferably, the aggregates are calcium phosphate aggregates. Preferably, the material is resistant to fracture. In further embodiments, the materials are used in surgical procedures of bone replacement. In further embodiments, the materials contain polyhedral silsesquioxanes and / or biodegradable segments

The invention provides an amphiphilic copolymer comprising monomer units derived from a first monomer and monomer units derived from a second monomer. The copolymer has at least one hydrophobic endgroup. The first monomer is such that the copolymer is thermally responsive and the second monomer comprises a carboxylic acid or carboxylate group.

A thermo-responsive hydrogel, including a biocompatible monomer and / or polymer having an amino acid side chain. The hydrogel is thermo-responsive at a physiological temperature, and can include, incorporate, or encapsulate a treatment agent, such as a drug composition, a biomolecule, and / or a nanoparticle. The hydrogel is useful in delivering the treatment agent. The hydrogel is in a first physicochemical state for administration to a mammal. The hydrogel is thermo-responsive at a physiological temperature of the mammal, and changes to a second physicochemical state that is more solid than the first physicochemical state. In the second physicochemical state the thermo-responsive hydrogel releases the treatment agent.

A horizontal sidewall fire protection sprinkler has a deflector having a vertical face, transverse to the fluid flow from the output orifice, and a horizontal shelf positioned above and perpendicular to the vertical face. A portion of the horizontal shelf extends in the fluid flow direction by a first length, with respect to the vertical face, and this first length is less than about half of the total length of the horizontal shelf in the fluid flow direction. The sprinkler may be installed in a support cup having a raised mounting platform configured to receive the sprinkler body and a cylindrical outer surface. A horizontal or pendent fire protection sprinkler has a body having an output orifice and a flange and a seal cap to seal a flow of fluid from the output orifice and a thermally-responsive element positioned to releasably retain the seal cap. Housing members extend through and from the flange of the sprinkler body, and contain rods, each of which extends through the flange. A deflector is connected to ends of the rods.

Actuation assemblies for and methods of activating a thermally actuated active material actuator utilizing wireless transmissions of energy.

A method of cleaning a fouled and / or scaled UF or MF membrane with a solution containing one or more thermo-responsive polymers is disclosed. More specifically, the method comprises: (a) treating the membrane in a membrane separation system with a solution containing one or more TRP, wherein said TRP is soluble in said solution and at least an effective amount of said TRP diffuses into a foulant layer that is present on the surface and / or in pores of said membrane; (b) making insoluble said TRP diffused into said foulant layer; (c) optionally rinsing the membrane; (d) optionally backwashing the membrane with air and / or liquid between the steps (b) and (c); and (e) optionally backwashing the membrane with air and / or liquid after the membrane is rinsed in step (c).

The apparatus and method for manufacturing composite materials utilizing in situ resistive heating of thermal responsive materials such as thermosetting and thermoplastic resin composites by the strategic placement of non metallic conductive fibers. The electrically conductive fibers, which are energized to provide resistive heating, become part of the laminate.

The present invention relates to a process for preparing copolymer hydrogels with controlled molecular weights and having both thermo- and pH-responsive properties, wherein the process comprises the steps of (a) providing sulfonamide type styrenic or (meth)acrylamide-based monomers exhibiting different pKa values; (b) providing poly(N-isopropylacrylamide) or crosslinked poly(N-isopropylacrylamide-co-methylene bisacrylamide) hydrogels having thermo-responsive properties; and (c) providing several hydrogels exhibiting pH-sensitive properties and random or block copolymerizations of the sulfonamide type styrenic or (meth)acrylamide-based monomers prepared in step (a) with N-isopropylacrylamide and / or methylene bisacrylamide monomers used in step (b) in a polar or non-polar solvent; wherein said steps (b) and (c) are carried out by controlled / living radical polymerization using alkyl halides as the initiators and the transition metals with phosphine or amine ligands as the catalysts. The present invention also relates to the copolymer hydrogels made by the aforesaid process.

A fire protection sprinkler is provided. The sprinkler includes a body having an output orifice and a flange; a seal cap to seal a flow of fluid from the output orifice; and a thermally-responsive element positioned to releasably retain the seal cap and constructed to separate into a plurality of portions upon exposure to a predetermined temperature. The sprinkler also includes at least one deflector support member, a deflector connected to the deflector support member, and at least one arm extending from each of the deflector support members. Each of the arms has a free end positioned in spaced relation to the thermally-responsive element to contact the portions of the thermally-responsive element upon separation thereof. In another embodiment, the sprinkler includes at least one arm extending from the flange, and the arms may be formed as a bracket.

Disclosed is a temperature conditioning system including several thermal transfer blocks, where each is associated with one of several components requiring thermal management. Each of the components is associated with a different time dependent thermal management profile. A fluid path, with a heat transfer fluid, connects one or more transports to the thermal transfer blocks. For each thermal transfer block, at least one thermo-responsive valve is located downstream from the thermal transfer block. The thermo-responsive valve is passive in that it does not require energy other than thermal energy to move from a starting position to an ending position and the thermo-responsive valve is free of any exterior control lines. A method of temperature conditioning components is also disclosed including circulating a heat transfer fluid and optimizing the flow rate of the heat transfer fluid in response to differential changes in temperature of the heat transfer fluid by actuating one or more thermo-responsive valves.

A thermo-responsive hydrogel, including a biocompatible monomer and / or polymer having a side chain-linked amino acid. The hydrogel is thermo-responsive at a physiological temperature, and can include, incorporate, or encapsulate a treatment agent, such as a drug composition, a biomolecule, and / or a nano-particle. The hydrogel is useful in delivering the treatment agent. The hydrogel is in a first physicochemical state for administration to a mammal. The hydrogel is thermo-responsive at a physiological temperature of the mammal, and changes to a second physicochemical state that is more solid than the first physicochemical state. In the second physicochemical state the thermo-responsive hydrogel releases the treatment agent.

The invention discloses a technical means for thermo-responsive hydrogel package delivery of exosomes and treatment effect enhancement. The technical means includes: wrapping stem cell derived exosomes with thermo-responsive hydrogel which is liquid at 4 DEG C, injecting to an injured part to form hydrogel with wrapped exosomes in vivo, and slowly releasing the exosomes to injured tissues. By adoption of the hydrogel, the retention rate and local concentration of the exosomes at the injured part can be increased while stability of functional molecular in the exosomes is improved, and the exosomes can be slowly released to the injured part to further improve treatment effects of the exosomes and promote structural and functional recovery of the injured tissues.

The present invention relates to a process for the preparation of oligo(alkylene glycol)-functionalized polyisocyanopeptides comprising the steps of functionalizing an isocyanopeptide with oligo-(alkylene glycol) side chains and subsequently polymerizing the oligo-alkylene glycol-functionalized isocyanopeptides. Several isocyanopeptides may be functionalized with various linear or non-linear oligo-(alkylene glycol) side chains having variable chain length. The alkylene glycol may be selected from the group consisting of ethylene-, propylene-, butylene- or pentylene glycol. Preferably, the isocyanopeptides are functionalized with at least three ethylene glycol side chains. The peptides may comprise L-amino acids, D-amino acids or D, L-amino acids. The obtained oligoalkylene-functionalized polyisocyanopeptides are a new class of materials with unique thermo-responsive properties.

The present invention relates to a thermo-responsive draw solute that can be applied to water desalination and purification based on forward osmosis. The thermo-responsive draw solute has a molar mass of 50 to 3000 g / mol and undergoes a phase transition at a temperature of 0° C. to 70° C. The thermo-responsive draw solute creates optimum conditions for the desalination of seawater and the purification of contaminated water based on forward osmosis. The present invention also relates to a method for water desalination and purification using the thermo-responsive draw solute. The method consumes little energy for water desalination or purification, is simple to apply to water desalination or purification, and enables separation of the draw solute in a very easy manner.

The invention discloses a photo-thermal response super-hydrophobic anti-icing composite coatinglayer and a preparation method thereof. The preparation method comprises the following steps: coating room-temperature silicone rubber on the surface of a base material; dispersing micron-sized particles and nano-sized particles in a solvent, and adding a dispersing agent to obtain a uniform mixture solution; spraying the mixture solution on the surface of a substrate by using a spray gun to obtain a super-hydrophobic coating layer; and carrying out heat treatment and fluorination treatment to obtain the stable photo-thermal response super-hydrophobic anti-icing composite coating layer. The prepared photo-thermal response super-hydrophobic anti-icing composite coating layer has the advantages of super hydrophobicity, low adhesion, firmness and excellent photo-thermal characteristics, and is wide in application scene and high in mechanical stability.

The invention provides polymer compositions, compounds, processes, and methods of use of the polymers for biodegradable consumer plastics, adhesives, e.g., bioadhesives, pressure sensitive adhesives and thermos-responsive adhesives.

The invention belongs to the technical field of functional materials and particularly relates to a preparation method of stripping, functional modification and dual response intelligent composite gel of transition metal disulfide. A temperature-sensitive functional poly ionic liquid aqueous solution is used for ultrasonic stripping of transition metal disulfide powder, so that a nano layer laminated aqueous solution of the transition metal disulfide modified by polymer can be obtained directly; then a cross-linking agent is added so that intelligent gel with temperature and near-infrared dual response can be further prepared, and the intelligent gel can be taken as a shape memory material and an optothermal response intelligent gel material. The method is easy and convenient to operate, the production cost is low, batch production is easy, the prepared intelligent composite gel has multiple stimuli response, and the method can be applied widely and has large scale preparation potential and wide commercial application prospect.

The invention discloses multifunctional compound fabric and a production method thereof. The production method includes: performing oxygen plasma hydrophilic modification on commercial polypropylene fabric, then chemically plating the surface of the polypropylene fabric with a silver layer, spraying the mixed dispersion of Fe3O4 and PDMS to the surface of the sliver-plated fabric, and finally curing to obtain the multifunctional compound fabric. The multifunctional compound fabric has excellent electromagnetic shielding performance, super-hydrophobicity and electrothermal and photothermal responsiveness and can be applied to fields such as electromagnetic shielding garments in extreme environments, intelligent response fabric, photothermal conversion, electrothermal conversion or flexible wearable devices.

The present invention provides a method for preparing a composition comprising porous ceramic, comprising the following steps: (a) synthesizing poly(N-isopropylacrylamide-co-methacrylic acid) (p(NIPAAM-MAA)) or similar thermo-response compound thereof; (b)mixing a dispersant with hydroxyapatite or calcium phosphate salt; (c) mixing the p(NIPAAM-MAA) of the step (a) or similar thermo-response compound thereof with water to obtain a hydrogel solution; (d) mixing the hydrogel solution of the step (c) and product of the step (b) to produce a mixture; (e) adding macromolecular particles to the mixture of the step (d) and stirring to produce a slurry; (f) filling the slurry of the step (e) into a template slot; and disposing the template slot filling with the slurry of the step (f) on a crucible, then proceeding high temperature sinter in a furnace to form the composition comprising porous ceramic.

The invention discloses a wood-imitating profile prepared through glass fiber reinforced plastic waste regeneration and a preparation process thereof. The wood-imitating profile comprises a wrapping layer and a core material. The wrapping layer is a thin-walled polymer thermal-response shrinkage tube. The core material is prepared from, by weight, 40-130 parts of glass fiber reinforced plastic waste regeneration powder, 0.1-5 parts of ester bond in-situ processing active catalyst, 0-1.5 parts of silane coupling agent, 50-150 parts of polyolefin resin regeneration material, 0.5-20 parts of foaming master bath, 0.2-2 parts of sodium bicarbonate, 0.1-0.5 part of foaming promoter, 0.5-5 parts of dispersed lubricant A and 0.2-2.5 parts of heat stabilizer. The foaming master batch is prepared from, by weight, 25-75 parts of linear polyethylene, 20-75 parts of adhesion promoting resin, 1-15 parts of azodicarbonamide and 1-5 parts of dispersed lubricant B. The prepared multifunctional high-strength multi-layer wood-imitating profile is stable in structure and free of warping and stripping, and meanwhile recycled materials are effectively prevented from influencing the user friendliness and environmental protection property of the wood-imitating profile by the environmental protection problem of raw materials.

Method for the preparation of inorganic-NP-composite microgels is based on the reversible transfer of microgels between water and an organic solvent such as tetrahydrofuran (THF). The method is used to produce semiconductor nanocrystals, often referred to as quantum dots (QDs) which are well known for their unique optical, electrical, magnetic and catalytic properties, as the inorganic NPs, recognizing that the best quality QDs are synthesized by a high temperature process in organic media, and have their surface covered with hydrophobic ligands (such as trioctylphosphine oxide, TOPO) that render the NPs insoluble in an aqueous solution.

The invention discloses a method for preparing a photothermal conversion material on the basis of iodine doping. The equipment provided by the invention is based on doping preparation of black materials so as to realize the scaled processing of photothermal conversion materials and to further realize the three-dimensional stereoscopic modeling processing precise customized physical therapy, wherein used materials comprise industrial rubber (trans-polyisoprene), elemental iodine and various high molecular materials capable of realizing blending. Compared with a conventional photothermal conversion material, the photothermal conversion material obtained by the method of the invention has the advantages that simplicity is realized; the acquisition is easy; the large-scale production and processing can be realized; the modeling forming and processing can be realized; the operation is convenient; through the fine structure printing, the firm foundation is laid for the subsequent wide application; wide application prospects can be realized in the high-end customized personnel nursing market. Through the characteristic of easy blending with various materials, the application in aspects ofphotothermal conversion, further pyroelectricity and the like can be realized with the help of other thermal response materials; a novel idea is provided for solving the environment problems of hazeremoval and the like.

An enclosure includes a case and a heat dissipating area formed on the case. The heat dissipating area defines a number of heat dissipating holes in the heat dissipating area. The material of the heat dissipating area is thermo-responsive shape memory polymer. The heat dissipating holes have a first size in response to the temperature around the heat dissipating area being under a predetermined value. The heat dissipating holes can grow to a second size in response to the temperature around the heat dissipating area being greater than the predetermined value. The first size is less than the second size.

The invention belongs to the technical field of polymers and relates to a preparation method and an application of an amphiphilic thermo-responsive block copolymer. The amphiphilic thermo-responsive block copolymer comprises water-soluble PEG (polyethylene glycol) blocks and thermo-responsive PNIPAM (poly(N-isopropylacrylamide)) blocks. The thermo-responsive block copolymer material is prepared through steps as follows: firstly, trithio ester containing carboxyl is prepared and then subjected to esterification reaction with ethylene glycol monomethyl ether, a PEG macromolecular chain transferagent is prepared, finally, N-isopropyl acrylamide monomers are polymerized to the PEG macromolecular chain transfer agent through RAFT polymerization, and the thermo-responsive block copolymer with narrow distribution width index and proper lower critical solution temperature is synthesized. The prepared polymer has the advantages of narrow distribution width index, proper lower critical solutiontemperature and the like; the thermo-responsive block copolymer and organic salt establish a regenerative two-phase aqueous system, and the polymer has characteristics that split-phase temperature islow, operating conditions are mild, the polymer is easy to recycle and the like.

The invention belongs to the technical field of preparation of fiber materials, and particularly relates to a cellulose-based temperature-sensitive conductive hydrogel, and a preparation method and application thereof. The preparation method comprises the following steps: (1) adding a guar gum solution and epichlorohydrin into a cellulose solution to obtain a cellulose-based hydrogel, then addingthe cellulose-based hydrogel into a water solution containing N-isopropylacrylamide and N,N-methylene bisacrylamide, adding a persulfate to carry out a cross-linking reaction, and finally, dialyzing the hydrogel formed by the cross-linking to remove impurity ions; and (2) soaking the dialyzed hydrogel in an aniline water solution, then adding a persulfate, and carrying out a reaction under ice bath to obtain the cellulose-based temperature-sensitive conductive hydrogel. The hydrogel provided by the invention not only has unique thermal response performance, but also is endowed with excellent conductive property and excellent mechanical property. The hydrogel can be widely used in the fields of conductive materials, intelligent response materials, temperature sensors and the like.

The present invention relates to a process for preparing copolymer hydrogels with controlled molecular weights and having both thermo- and pH-responsive properties, wherein the process comprises the steps of (a) providing sulfonamide type styrenic or (meth)acrylamide-based monomers exhibiting different pKa values; (b) providing poly(N-isopropylacrylamide) or crosslinked poly(N-isopropylacrylamide-co-methylene bisacrylamide) hydrogels having thermo-responsive properties; and (c) providing several hydrogels exhibiting pH-sensitive properties and random or block copolymerizations of the sulfonamide type styrenic or (meth)acrylamide-based monomers prepared in step (a) with N-isopropylacrylamide and / or methylene bisacrylamide monomers used in step (b) in a polar or non-polar solvent; wherein said steps (b) and (c) are carried out by controlled / living radical polymerization using alkyl halides as the initiators and the transition metals with phosphine or amine ligands as the catalysts. The present invention also relates to the copolymer hydrogels made by the aforesaid process.

The invention discloses a method for preparing stimuli-responsive porous aquagel. The method comprises the steps: uniformly mixing polymer monomers, an initiator, a cross-linker and water according toa preset mass ratio at the temperature of 0 DEG C to 4 DEG C, so as to obtain a precursor; subjecting the obtained precursor to freezing polymerization for 1 to 24 hours at the temperature of -40 DEGC to -10 DEG C, so as to obtain frozen gel; and subjecting the frozen gel to unfreezing polymerization for 1 to 24 hours at the temperature of 4 DEG C to 20 DEG C, thereby obtaining the stimuli-responsive porous aquagel. According to the method provided by the invention, freezing polymerization prior to unfreezing polymerization is employed, and the freezing condition is -40 DEG C to -10 DEG C, so that the rapid formation of ice crystals is facilitated, thus, the polymerization time is greatly shortened, and the production cost is reduced. Meanwhile, the obtained frozen gel is subjected to unfreezing polymerization for 1 to 24 hours at the temperature of 4 DEG C to 20 DEG C and is subjected to rapid cross-linking polymerization while the ice crystals melt, and thus, the elasticity and fatigue resistance of the aquagel are improved; and due to a porous effect after ice crystal melting, the thermal response characteristic and swelling ratio of the aquagel are improved.

Disclosed is a method for detecting the presence of a thermo-responsive point related with the thermal deformation of a main shaft. By changing the temperature of a heating element, the temperature field distribution of the main shaft is changed. Thermistors and eddy current sensors transmit acquired information to a computer. Then, Labview software is employed to analyze and process the information and fuzzy clustering and linear regression methods are employed to carry out the processing. According to the detecting method provided by the invention, the thermistors can be disposed at places of different radiuses so that if a function relation can be established between the temperature at the places of different radiuses and the deformation of the main shaft, the presence of the thermo-responsive point can be determined; and if the function relation cannot be established, the presence of the thermo-responsive point can be denied. According to the invention, if the main shaft do have the thermo-responsive point, the deformation of the main shaft under different technology conditions can be obtained in a more accurate manner based on the thermo-responsive point so that the controlling quantity of an error compensation control system can be changed based on the deformation of the main shaft under different working conditions, thereby increasing the working precision of the main shaft.