84results about How to "Good temperature response" patented technology

The invention discloses a preparation method of a temperature response type polyvinylidene fluoride flat separation film, in particular to an intelligent type macromolecular flat separation film technology, belonging to the technical field of films. The intelligent type macromolecular flat separation film technology comprises the following steps of: 1, conducting the alkali treatment of PVDF powder; 2, preparing a temperature-sensitive copolymer, i.e. copolymerizing the PVDF powder subjected to the alkali treatment with a temperature-sensitive monomer NIPAAm, and synthetizing a PVDF-g-PNIPAAm copolymer; and 3, preparing the temperature response type PVDF flat separation film by using a phase inversion method. The preparation method of a film-forming copolymer has simple process, low cost, no need of special equipment, easy industrialized construction, and the like. The intelligent film product is a novel temperature response type PVDF intelligent film which can sensitively respond to the change of environmental temperature.

The invention belongs to the field of a magnetic nano-drug/a genetic carrier, in particular to a temperature-sensitive amphiphilic block copolymer/an iron oxide genetic carrier which has the capacity of controlling and relieving drug, a preparation method thereof and application thereof. Polyethyleneimine and polyoxyethylene-polypropylene oxide-polyoxyethylene amphiphilic block copolymer (Pluronic) are decoratively arranged on the surface of iron oxide super paramagnetic nanometer particles. DNA/RNA and the drugs having groups of negative electricity are loaded by the use of groups of positive electricity that are decoratively arranged on the Pluronic; drug loading and released temperature control can be realized by the temperature sensitivity of Pluronic near the body temperature; the amphiphilicity of Pluronic can used for realizing simultaneous loading of hydrophobic/hydrophilic drugs and improving the penetration capability of a drug carrier; the excellent dispersity of the carrier and the long-acting circulation through the body are realized by the biocompatibility of Pluronic; the super paramagnetism of iron oxide kernel is used for realizing targeting delivery of the drug.

The invention relates to a preparation method of a temperature-sensitive hollow nanofiber membrane. The preparation method comprises the following steps: copolymerizing temperature-sensitive monomers,monomers capable of forming physical crossing points and monomers capable of forming chemical crossing points by heating by free radical solution polymerization to obtain a temperature-sensitive polymer; adding the temperature-sensitive polymer in a solvent and stirring to obtain a polymer solution as a shell spinning solution, taking viscous oil as a core layer spinning solution, and carrying out coaxial electro-spinning to obtain a nanofiber membrane with a core-shell structure; and carrying out heat treatment, and extracting the core layer viscous oil by an organic solvent to obtain the final product. By the coaxial electro-spinning method, the outer diameter, inner diameter and wall thickness of a product can be controlled effectively, a preparation process is environmentally friendly, and conditions are gentle. The obtained temperature-sensitive hollow nanofiber membrane can stably exist in water and cannot be dissolved, has rapid temperature sensitivity, and can be applied to atemperature sensor, a drug controlled release carrier, a cell culture substrate or a support, oil-water separation or biological substance purification film.

The invention discloses a flat separation membrane, belongs to the field of membrane technology and particularly relates to intelligent polymeric flat separation membrane technology. The invention adopts a technical scheme comprising: 1, carrying out alkali treatment to PVDF powder; 2, preparing temperature sensitive copolymer, copolymerizing the PVDF powder after alkali treatment and temperature sensitive monomer NIPAAm, and synthesizing PVDF-g-PNIPAAm copolymer; and 3, preparing the temperature response type PVDF flat separation membrane by a phase inversion method. A preparation method of membrane forming polymer has the characteristics of simple process, low cost, having no use for special equipment, easy industrial implementation and the like. An intelligent membrane product is a novel temperature sensitive type PVDF intelligent membrane capable of sensitively responding to environment temperature change.

The invention relates to a preparation method for a shape thermo-sensitive hydro-gel material. The method comprises the following steps: (1) carrying out vacuum drying on polyether glycol or polyester glycol, reducing temperature to 80-90 DEG C and then reacting with maleic anhydride MA for 4-6h, thereby obtaining a macromolecular diene compound; (2) by taking the macromolecular diene compound as a cross-linking agent, isopropyl acrylamide NIPAM as a functional monomer and an alkenyl compound containing hydroxyl or amido as a cross-linking reaction monomer, mixing the materials with an emulgator and an initiator and reacting for 6-8h at 70-80 DEG C, thereby obtaining the shape thermo-sensitive hydro-gel material. After the shape thermo-sensitive hydro-gel material provided by the invention is settled on a textile fabric, the autonomic regulation for the air permeability and water vapor permeability of the textile fabric under different temperature conditions can be realized, and then the initiative regulation for the moisture permeability, air permeability and heat insulating property of the textile fabric can be realized.

The invention discloses a temperature-sensitive self-cleaning polyvinylidene fluoride film and a preparation method thereof. The preparation method comprises the steps of taking polyvinylidene fluoride, titanium dioxide and N-isopropyl acrylamide as main materials to prepare the titanium dioxide/N-isopropyl acrylamide nanoparticle/polyvinylidene fluoride blend film. The preparation method is simple in process and easy for operation and popularization, and does not need an expensive instrument; and the prepared temperature-sensitive self-cleaning polyvinylidene fluoride film is good in temperature response performance and self-cleaning property, and has a wide potential application value in the fields of intelligent devices, water treatment, biochemical engineering and the like.

The invention discloses a method for preparing a fiber separation film, and relates to an intelligent separation film, in particular to a method for preparing a temperature responsive separation film. The temperature responsive PVDF hollow fiber separation film is prepared by the following steps of: (1) alkali treatment of PVDF powder; (2) preparation of a temperature-sensitive copolymer, namely performing copolymerization on the PVDF powder after the alkali treatment and a temperature-sensitive monomer NIPAAm to synthesize a PVDF-g-PNIPAAm copolymer; and (3) preparation of a temperature responsive hollow fiber separation film. The method for preparing a film-forming polymer has the characteristics of simple process, low cost, no need of special equipment, easy industrial implementation and the like; and the spinning performance of the copolymer is excellent, and the spinning film-forming process is simple in technology, low in cost and easy for industrial implementation. The intelligent film product is a novel temperature-sensitive PVDF intelligent film which is sensitive to and responds to the change of ambient temperature.

A supplying power adjusting apparatus has excellent temperature response and excellent stabilities to power supply change and load change. The apparatus is provided with a semiconductor inverter for high-speed switching power control, which converts a direct current rectified by a rectifying circuit (10) into alternating current power in response to a control signal and supplies a heater (7) with the power; a temperature change detecting circuit (24) for detecting the temperature change of the heater (7); a power supply change detecting circuit (22) for detecting the power change of the rectifying circuit (10); a load change detecting circuit (23) for detecting the change of the alternating current power supplied to the heater (7); and a power control signal generating circuit (15) which calculates a power quantity to be supplied to the heater (7) and controls the frequency or duty ratio of a control signal to be added to the power controlling semiconductor inverter in response to the calculated results.

The invention belongs to the field of temperature stimulus response films, and provides a method for preparing a polyether sulfone temperature stimulus response film. The method comprises the following steps: (1) adding poly(N-isopropylacrylamide) nano-gel dry powder into N-methylpyrolidone, uniformly mixing, adding polyether sulfone, uniformly mixing to form a film casting liquid, and degassing the film casting liquid; (2) pouring the degassed film casting liquid onto a film casting panel, preparing a continuous uniform liquid film from the film casting liquid by using a film blade, standing the liquid film-loaded film casting panel for at least 20 minutes at a temperature of 20-30 DEG C and relative humidity of 60-80 percent, putting the film-loaded film casting panel into water at room temperature, soaking until the liquid film is completely solidified, washing the solidified film to remove N-methylpyrolidone, and drying the film in which micropores are uniformly distributed along the thickness direction of the film, thus obtaining the polyether sulfone temperature stimulus response film. The method is capable of promoting the film flux, temperature response capability and mechanical performance of the polyether sulfone temperature stimulus response film, the process is simple, and industrial production can be realized easily.

The invention relates to a preparation method and application of a hybrid chemical sensor based on an amphiphilic thermo-sensitive block copolymer and belongs to the technical field of preparation andapplication of chemical materials. The hybrid chemical sensor is formed by two probes P (NIPAM-co-BDMA) and P (NIPAM-co-Rh6GEMa). The preparation method and the application provided by the inventionhave the benefits that a multifunctional polymer fluorescent probe is combined with vision inspection to obtain a multifunctional vision heat sensor; through reasonably designing a detection model, aneigenvalue of color is extracted; a PCA analysis method is constructed, so that the simultaneous quantitative detection on Al<3+> and Fe<3+> is realized.

A differential amplifier is described comprising an input branch for receiving differential and common mode input signal components; an output branch providing differential and common mode output signal components; and the differential amplifier being adapted to set a relationship between the magnitude of the common mode output signal component level of the amplifier with respect to the magnitude of the common mode input signal component level to the input stage so that the common mode output signal component level intrinsically follows the common mode input signal component level as a common mode follower without using feedback control of the common mode output signal component. Also an asymmetrical amplifier is described which may be advantageously used as a component of the differential amplifier.

The invention relates to the field of preparation of hydrogel and in particular relates to double-crosslinking hybrid hydrogel based on an acyl hydrazone bond and hydrophilic and hydrophobic self-assembling and a preparation method thereof as well as a skin tissue wound repairing agent. The double-crosslinking hybrid hydrogel is prepared from the following raw materials: hydrazide modified hyaluronic acid HAHZ and formyl modified polyethylene oxide-polypropylene oxide-polyethylene oxide PFAH; the adding mass ratio of the HAHZ and the PFAH meets the following conditions: the range of a hydrazide substitution degree/a formyl substitution degree is 20 to 80 percent and the balance is of a water solvent. According to the double-crosslinking hybrid hydrogel based on the acyl hydrazone bond andthe hydrophilic and hydrophobic self-assembling, advantages of covalent crosslinking and physical mutual effects are sufficiently combined and the prepared double-crosslinking hybrid hydrogel has an excellent self-healing property; the problem that medical gel dressing is easy to break due to an external force is easy to solve; the double-crosslinking hybrid hydrogel has certain temperature responsiveness and good mechanical performance and in-situ molding property ; the double-crosslinking hybrid hydrogel is very suitable for repairing nursing or treatment of skin tissue wounds.

A semiconductor manufacturing apparatus for performing heat treatment by carrying a substrate holder, on which a plurality of substrates are loaded, into a reacting furnace. The semiconductor manufacturing apparatus is provided with a heater arranged on a circumference of the reacting furnace, and a supply power adjusting apparatus for adjusting a supplying power to the heater. The supply power adjusting apparatus is composed of a power IGBT converter for converting an alternating voltage from an alternating power supply into an alternating power in accordance with the frequency of a control signal and supplying the heater with the alternating power, and a regenerating IGBT converter for regenerating a back electromotive force generated by switching operation of the IGBT converter and returning the back electromotive force to the alternating power supply.

The invention discloses a multi-intelligence responsiveness microcapsule. The multi-intelligence responsiveness microcapsule is prepared from aliphatic polyamine polyurethane and ferroferric oxide, wherein each of the aliphatic polyamine polyurethane and the ferroferric oxide is of a laminated structure and a plurality of layers of the aliphatic polyamine polyurethane and the ferroferric oxide arearranged; the aliphatic polyamine polyurethane layers and the ferroferric oxide layers are alternately assembled together layer by layer to form the aliphatic polyamine polyurethane/ferroferric oxideintelligence response hollow microcapsule; the surface of the microcapsule is modified by an anti-tumor hydrophilic drug. The invention further discloses application of the microcapsule serving as acarrier for delayed release of the drug, and a preparation method of the microcapsule. The multi-intelligence response microcapsule is prepared by utilizing a layer-to-layer self-assembling method; the method is simple and convenient and low cost; the multi-intelligence response type microcapsule has excellent multi-response performance including pH (Potential of Hydrogen), temperature, near infrared, magnetic response and the like and good biocompatibility; a cancer treatment drug doxorubicin hydrochloride is modified on the surface of the microcapsule so that the target property and the utilization rate of the drug are enhanced; the multi-intelligence responsiveness microcapsule has a good application prospect in the field of controlled release of the multi-intelligence response drugs.

The invention discloses a preparation method and application of a magnetic exosome-entrapped refractory wound dressing. The preparation method comprises the following steps of firstly, mixing a chitosan solution with a betasodium glycerophosphate solution to obtain a mixed solution I; then adding a hydroxyethyl cellulose solution into the mixed solution I to obtain a mixed solution II; co-incubating the human mesenchymal stem cells and the Fe3O4 superparamagnetic nanoparticles, extracting to obtain magnetic exosomes, and adding the magnetic exosomes into the mixed solution II to prepare the temperature-sensitive hydrogel dressing entrapping the magnetic exosomes. The hydrogel dressing prepared by the method has excellent temperature sensitivity, can be injected for administration, has theeffects of resisting bacteria, promoting angiogenesis and the like, and has a good application prospect in promotion of refractory wound repair.

The invention provides preparation methods of carbon quantum dots and a carbon quantum dot and MOFs (Metal Organic Frameworks) composite thin film, and a product and application of the composite thinfilm. The preparation method of the carbon quantum dots, which is provided by the invention, is simple and efficient. Moreover, by loading the prepared carbon quantum dots on MOFs, a carbon quantum dot and MOFs composite material is obtained; by adopting a bran-new method, namely, an electrophoresis method, the composite material is prepared into a thin film device; and a result that the device can be used for aspects of temperature sensing and the like is discovered.

The invention provides hydrogel with excellent antibacterial performance for burn wound healing and a preparation method of the hydrogel. The hydrogel is an ABA type triblock reticular copolymer formed by polymerizing a polyethylene glycol monomer and an N-isopropylacrylamide monomer, wherein the copolymer comprises a mussel bionic tissue bonding group and a nanoparticle anchoring group; the hydrogel is loaded with silver nanoparticles and zinc nanoparticles, and cyclosporine A is carried on the surface and the interior of the hydrogel. The hydrogel material prepared by the invention has the characteristics of high strain, biocompatibility, adhesiveness, heat sensitivity, injectability, microbial resistance and the like, and can promote the healing speed of full-thickness burn wounds. Meanwhile, the antibacterial activity is excellent.

Provided herein is a differential temperature sensor which utilizes multiple temperature sensors to quickly and accurately calculate ambient fluid temperature with a reduced response time. The provided systems and methods utilize a first fluid temperature sensor and a second probe temperature sensor to account for the thermal impact of the device on the ambient fluid temperature and the effect of heat within the device, or temperature difference between the probe and fluid temperature, on the first fluid temperature sensor measurement.

The invention discloses a pH fluorescence chemical sensor based on a temperature-sensitive double hydrophilic block polymer, and a synthesis method and application thereof, belonging to the technicalfield of chemical fluorescent materials. The pH fluorescence chemical sensor PEG<113>-b-P(NIPAM-co-RhHHMa)<65> based on the temperature-sensitive double hydrophilic block polymer is synthesized in theinvention, and an acid recognition motif RhHHMa is labeled in the temperature-sensitive block of the sensor. The pH fluorescence chemical sensor is a multifunctional fluorescent chemical sensor withpH response and temperature response, and has the characteristics of excellent water solubility, biocompatibility, high sensitivity, etc. Moreover, the pH fluorescence chemical sensor can self-assemble to form an aggregate with P(NIPAM-co-RhHHMa)<65> as a core, and the pH response motif RhHHMa is embedded in the hydrophobic core, so the quantum yield of fluorescent elements is increased, which enables the amplification of signals to be realized.