39results about How to "Increased humidity sensitivity" patented technology

An image receiver element includes a water-soluble or water-dispersible polyurethane binder in the image receiving layer. This polyurethane has a Tg of from about 60 to about 80° C., a molecular weight of at least 25,000, and an acid number of from about 16 to about 35 mg KOH / g. Moreover, the polyurethane comprises from about 42 to about 60 weight % of recurring urethane units, from about 8 to about 20 weight % of alkylene glycol recurring units, from about 18 to about 40 weight % of carbonate recurring units having aliphatic side chains, and from about 3 to about 15 weight % of recurring units having a water-soluble or water-dispersible acid group, based on total binder weight.

The invention discloses a humidity sensor and improvement and preparation of the humidity sensor based on graphene oxide. The humidity sensor is provided with a humidity sensitivity component based ona reduced graphene oxide material, a graphene oxide material is treated by hydrobromic acid solution to obtain the reduced graphene oxide material in the humidity sensitivity component, the humiditysensitivity component can respond to environment humidity, and the environment humidity is sensed. According to the humidity sensor, a treatment process of the key graphene material humidity sensitivity component in the humidity sensor and a micro-composition, a structure and the like of the correspondingly acquired reduced graphene oxide material are improved, the graphene oxide material is treated by the hydrobromic acid solution to obtain the reduced graphene oxide material or the graphene oxide material and a polycationic polymer alternately deposit to form a graphene oxide composite filmby an electrostatic inducement layer by layer self-assembly method, and the acquired humidity sensor can keep good stability, humidity sensitivity and humidity stickiness in high-humidity environments.

The invention provides a non-shrinking pulverized-fuel-ash-based geopolymer steel structure anti-corrosive coating. Surface coatings of steel structures can obstruct direct contact of corrosive mediums such as chloride ions with reinforcing steel bars, and the anti-corrosive performance of the reinforcing steel bars is effectively improved; however, currently, surface coatings of the reinforcing steel bars have shortcomings that the interface bonding performance of the reinforcing steel bars and the concrete is lowered, pitting corrosion is triggered due to the defects of the coatings, and application of the coatings in practical engineering is seriously restricted accordingly. According to the non-shrinking pulverized-fuel-ash-based geopolymer steel structure anti-corrosive coating, by conducting blending to obtain a proper alkali excitation matching proportion, the cracking resistance and saltpetering resistance of the pulverized-fuel-ash-based geopolymer inorganic anti-corrosive coating are improved; meanwhile, the compactness, carbonization resistance and ion infiltration resistance of the coating are improved, the bonding strength between the coating and the reinforcing steelbars is improved, and the cost is reduced.

The invention discloses a gas water heater for preventing moisture corrosion. A moisture-sensitive sensor module is mounted on the external part of the gas water heater, so that the change in humidity in the ambient environment can be detected in the use process of the gas water heater and the gas water heater can be effectively protected. The moisture-sensitive sensor module is creatively designed at the aspects of sensitive material, making condition, structure and the like of sensors; the sensitivity can be greatly increased; the testing repeatability is excellent; an unexpected technical effect is achieved; and the market application prospect is wide.

The invention relates to a preparation method of a low-cost high-sensitivity NaCl doped mesoporous silica resistor type humidity-sensitive material. The preparation method comprises the following steps of synthesizing a mesoporous silicon dioxide molecular sieve by adopting a hydrothermal method, forging the obtained mesoporous material at 550 DEG C so as to remove a surfactant, mixing the forged mesoporous material with a proper amount of sodium chloride, grinding again by taking absolute ethyl alcohol as a solvent, and doping. The preparation method has the characteristics of simple doping process, no need of thermal treatment and simplified preparation technology. According to the low-cost high-sensitivity NaCl doped mesoporous silica resistor type humidity-sensitive material, the humidity-sensitive sensitivity is high; within the full-humidity range ability of 11%RH-95%RH, the impedance change order of magnitude is greater than four orders of magnitude and approaches five orders of magnitude, and the ideal doping proportion is obtained by testing for multiple times; the humidity-sensitive performance of the material is improved effectively; within the full-humidity range ability of 11%RH-95%RH, the impedance change order of magnitude is greater than four orders of magnitude and approaches five orders of magnitude, and meanwhile, the preparation technology of the type of materials is simplified.

The invention relates to a preparation method of a macromolecular hydrogen bond compound fiber. The method comprises the following steps: respectively dissolving and mixing a macromolecular hydrogen bond donor and a macromolecular hydrogen bond acceptor, so as to obtain a uniform spinning solution; defoaming, filtering, standing and deforming the spinning solution, metering, entering a coagulating bath to coagulate and mold through a spinneret plate, so as to obtain a nascent fiber; and drying the nascent fiber, so as to obtain the macromolecular hydrogen bond compound fiber. Two high polymers which are difficult in fiber forming are successfully spun into a compound fiber on the basis of mutual action of hydrogen bonds, so that the spinning field and the application space of the high polymers are expanded; the high polymers also have novel properties, such as high elasticity and humidity sensitivity.

The invention discloses a vacuum pump for preventing water vapor corrosion. According to the vacuum pump disclosed by the invention, by installing a humidity-sensitive sensor module at the outer part of a pump body of the vacuum pump, the variation of humidity in a surrounding environment of the vacuum pump can be detected during a using process of the vacuum pump, and the vacuum pump can be well protected; the humidity-sensitive sensor module is creatively designed in many aspects of sensitive materials, manufacturing conditions, structures and the like of sensors, so that the sensitivity of the humidity-sensitive sensor module is greatly increased, the testing repeatability is good, an unexpected technical effect is generated, and a very large market application prospect is obtained.

The invention discloses a switch voltage stabilizer based on calibration environment humidity changes. A humidity-sensitive sensor module is mounted outside a cabinet of the switch voltage stabilizer, so that when in use, the switch voltage stabilizer can detect changes of humidity in surrounding environment and is well protected. Sensitive material, manufacturing condition and structure of a sensor of the humidity-sensitive sensor module are designed creatively, so that sensitivity of the switch voltage stabilizer is improved greatly, testing repeatability is high, unexpected technological effect is generated, and the switch voltage stabilizer has huge market application prospect.

The invention discloses an electric vehicle charging station for resistance to water vapor corrosion. A humidity-dependent sensor module is installed on the outside of each charging pile. Thus, during the application process of the electric vehicle charging station, changes of humidity in the ambient environment can be detected, and the electric vehicle charging station is greatly protected. Sensitivity of the humidity-dependent sensor module is high, test repeatability is good, and an unexpected technical effect is generated. The electric vehicle charging station has a great market application prospect.

The invention discloses a preparation method for Fe3O4 / Si nano porous array composite material, which comprises: forming a silicon-metal bond passivation layer of even, high-density, well thermal stability on single-crystal silicon by hydrothermal method; preparing nano Fe3O4 particle with un-agglomerated even particle size by microporous-hydrothermal method, then preparing the product by rotation spraying method. This invention improves magnetism and wet sensitive of Fe3O4, and heeds simple devices and low cost.

An image receiver element includes a water-soluble or water-dispersible polyurethane binder in the image receiving layer. This polyurethane has a Tg of from about 60 to about 80° C., a molecular weight of at least 25,000, and an acid number of from about 16 to about 35 mg KOH / g. Moreover, the polyurethane comprises from about 42 to about 60 weight % of recurring urethane units, from about 8 to about 20 weight % of alkylene glycol recurring units, from about 18 to about 40 weight % of carbonate recurring units having aliphatic side chains, and from about 3 to about 15 weight % of recurring units having a water-soluble or water-dispersible acid group, based on total binder weight.

The invention provides toughened anti-cracking and anti-corrosion solid waste concrete and a preparation method thereof. Mixing the cement, the fly ash, the slag and the natural aggregate; sequentially adding water, a weakly alkaline regulator and an additive solution containing a polycarboxylic acid water reducer to obtain concrete slurry; and curing to obtain the product. According to the invention, fly ash, slag solid waste and natural aggregate are used as aggregate, a water reducer is added to reduce the water consumption of concrete and improve the fluidity of concrete, and specially-made weakly-alkaline conditioning agent particles are introduced, so that the self-water-absorption-water-release behavior and bridging effect of the particles are utilized to improve the concrete fluidity. The early-stage and later-stage continuous hydration ability of a rubber material in the concrete is enhanced, the self-shrinkage and drying shrinkage resisting effects are achieved, the compactness and corrosion resistance of the concrete are improved, and then the anti-cracking ability of the all-solid waste concrete is improved. The surface of an obtained test piece is free of cracks, the 28d compressive strength reaches 46.6 MPa, the 28d breaking strength reaches 8.5 MPa, the self-shrinkage rate is 0.035%, and the drying shrinkage rate is 0.01%.

The invention discloses a polyimide film used for high-altitude humidity detection and a preparation method thereof. The polyimide film is obtained by high-temperature imidization of polyamic acid, and the polyamic acid is composed of 5%-20% It is composed of a mixture of diamine and dianhydride and 80%-95% of non-protonated solvent, wherein the molar mass ratio of diamine and dianhydride in the mixture of diamine and dianhydride is 1:0.8-1.2. The specific steps of the preparation method are: synthesizing polyamic acid, diluting polyamic acid, preparing polyamic acid film, imidizing the polyamic acid film together with the substrate material; polyimide film. The polyimide film of the present invention has good moisture absorption and dehumidification characteristics, fast adsorption and desorption of water molecules, and high humidity sensitivity; the implementation process of the preparation method is simple and easy to process, and it is suitable for use in the field of humidity detection, especially high-altitude humidity The application prospect in the field of detection is good.

The invention provides a polyurethane prepolymer which is novel environment-friendly non-isocyanate polyurethane, does not contain an isocyanate group with high toxicity and high moisture sensitivity, has no pollution to the environment and has no damages to human health. A preparation method provided by the invention has a simple operation process; a technology is optimized and raw materials are readily available; and the reaction selectivity is high and a preparation process is safe and clean. A low-viscosity ultraviolet-cured composition can be obtained through mixing the polyurethane prepolymer provided by the invention with a photoinitiator; a system does not contain any active diluting agent and is not retracted and deformed in a curing process; the low-viscosity ultraviolet-cured composition can be widely used for preparing ultraviolet-cured polyurethane coating, 3D (Three Dimensional) printing photosensitive resin, ultraviolet-cured polyurethane ink or an ultraviolet-cured polyurethane adhesive which has low viscosity, does not contain the active diluting agent, has small irritation to human bodies and is green and environmentally friendly.

The invention discloses a purple phosphorus alkenyl humidity-sensitive sensor as well as a preparation method and application thereof, and belongs to the technical field of humidity-sensitive sensors. The humidity-sensitive sensor is composed of a purple phosphorus alkene / graphene heterojunction and an electrode located on the surface of the purple phosphorus alkene / graphene heterojunction. Different amounts of purple phosphorene and graphene films are prepared into heterojunctions by adopting a vacuum filtration method, conductive silver adhesives are coated on the purple phosphorene / graphene heterojunctions, silver wires are connected, the purple phosphorene-based humidity-sensitive sensor is prepared, a humidity-sensitive test platform is assembled, different humidity is prepared by adopting a saturated salt solution, and the humidity-sensitive test result is obtained. A sensitivity detection experiment is carried out under the condition that the humidity is relatively stable. The prepared purple phosphorus-based humidity-sensitive sensor is short in response time, high in humidity sensitivity and obvious in humidity induction.

The invention discloses a self-powered humidity sensor based on a composite spinning film and a preparation method thereof, and relates to energy collection technology and sensitive electronics technology. Based on Nb 2 CT x The self-powered humidity sensor of the sodium alginate composite spinning film comprises a sensitive device and a spinning sensitive film arranged on the sensitive device, the sensitive device is an upper and lower electrode structure, and the sensitive film is made of Nb 2 CT x / Sodium alginate composites were prepared by electrospinning process. Utilize Nb 2 CT x The nanosheet and the nanocomposite fiber structure obtained by spinning provide a three-dimensional network space for the diffusion of water molecules; after the water molecules are adsorbed from top to bottom, the ion gradient diffuses to form a potential difference between the upper and lower electrodes and output a voltage signal. Compared with the traditional humidity sensor, the self-powered humidity sensor of the present invention does not require an external power supply system, and has the advantages of low power consumption, environmental protection, convenient portability, flexibility and lamination.

The invention relates to a preparation method of a low-cost high-sensitivity NaCl doped mesoporous silica resistor type humidity-sensitive material. The preparation method comprises the following steps of synthesizing a mesoporous silicon dioxide molecular sieve by adopting a hydrothermal method, forging the obtained mesoporous material at 550 DEG C so as to remove a surfactant, mixing the forged mesoporous material with a proper amount of sodium chloride, grinding again by taking absolute ethyl alcohol as a solvent, and doping. The preparation method has the characteristics of simple doping process, no need of thermal treatment and simplified preparation technology. According to the low-cost high-sensitivity NaCl doped mesoporous silica resistor type humidity-sensitive material, the humidity-sensitive sensitivity is high; within the full-humidity range ability of 11%RH-95%RH, the impedance change order of magnitude is greater than four orders of magnitude and approaches five orders of magnitude, and the ideal doping proportion is obtained by testing for multiple times; the humidity-sensitive performance of the material is improved effectively; within the full-humidity range ability of 11%RH-95%RH, the impedance change order of magnitude is greater than four orders of magnitude and approaches five orders of magnitude, and meanwhile, the preparation technology of the type of materials is simplified.

The invention discloses a gas pipeline with a high-sensitivity humidity detection device. Due to the fact that a humidity sensitive sensor module is installed on the exterior of the gas pipeline, the content of water steam in the environment can be detected by the gas pipeline in the using process, and therefore safe working of the gas pipeline is guaranteed; creative design is conducted on the humidity sensitive sensor module in multiple aspects of sensitive materials, making conditions, structures and the like of a sensor, the response speed is high, the sensitivity is greatly improved, the test repeatability is good, unexpected technical effects are achieved, and the great market application prospect is achieved.

The invention discloses a numerically controlled lathe for preventing water vapor corrosion. A humidity-dependent sensor module is installed outside the numerically controlled lathe, so that in the using process of the numerically controlled lathe, the humidity-dependent sensor module can detect changes of humidity in the surroundings and produces humidity early warning, and the numerically controlled lathe is well protected. The humidity-dependent sensor module is creatively designed from the aspects of sensitive materials, manufacturing conditions, the structure and the like of the sensor, is high in response speed, high in sensitivity and good in test repeatability, produces wonderful technical effects and has the wide market application prospect.

The invention discloses a preparation method for a CoTiO3 nanoarray humidity-sensitive film. The preparation method comprises the following steps: adding a hydrochloric solution of TiCl3 into a cobalt chloride aqueous solution to obtain a mixed solution A; regulating the pH value of the mixed solution to be 6-10, and obtaining a precursor solution B; transferring the precursor solution B into a hydrothermal reaction kettle, soaking a cleaned silicon substrate in the precursor solution B for reaction, and washing the silicon substrate to obtain a film C on the silicon substrate; putting the silicon substrate provided with the film C onto a sample stage of a magnetron sputtering apparatus, performing magnetron sputtering by adopting a Co2O3 radio-frequency target and a TiO2 radio-frequency target, and forming a film D on the silicon substrate; keeping the silicon substrate provided with the film D at a temperature ranging from 600 DEG C to 750 DEG C, and obtaining the CoTiO3 nanoarray humidity-sensitive film. The preparation method can effectively regulate and control the morphology of the film, is good in film-forming property, convenient to carry out, short in production period, high in efficiency and suitable for industrial production. The prepared CoTiO3 film has excellent moisture sensitivity at the room temperature and is short in response-recovery time.

The invention discloses a vacuum packaging device based on rapid response to humidity changes. By installing a humidity sensor module at the bottom of the cabinet of the vacuum packaging device, the vacuum packaging device can detect the humidity of the gas environment during the working process. Changes, which play a very good role in protecting the normal operation of the vacuum packaging equipment; the humidity sensor module is creatively designed from the sensor's sensitive materials, manufacturing conditions, structure, etc., so that the response speed is fast and the sensitivity is greatly improved. The test has good repeatability, has produced unexpected technical effects, and has great market application prospects.

The utility model relates to a high-sensitivity humidity sensor based on an inverse opal structure, and belongs to the field of humidity sensors, the high-sensitivity humidity sensor comprises an insulating substrate, a plurality of strip-shaped grooves are horizontally formed in the upper surface of the insulating substrate, the plurality of strip-shaped grooves are arranged in parallel at intervals, each strip-shaped groove is strip-shaped, and two ends of each strip-shaped groove extend to the edge of the insulating substrate; a strip-shaped groove is formed in the substrate, a first humidity-sensitive film is attached to the interior of the strip-shaped groove, an interdigital electrode is arranged above the insulating substrate, a second humidity-sensitive film is attached to the upper portion of the interdigital electrode, the strip-shaped groove is formed in the substrate, the humidity-sensitive films are attached to the substrate and the interdigital electrode, and the strip-shaped groove can increase the area of the oxidized graphene humidity-sensitive film; the oxygen-containing functional groups on the composite material can easily adsorb water molecules and provide a large number of adsorption sites for the water molecules, so that the humidity sensitivity is improved, the sensitivity and precision of the humidity sensor are improved, and the response speed is accelerated.

The invention discloses a preparation method and application of a three-dimensional flower-shaped NixPy-NixSy composite structure, and belongs to the field of NixPy-NixSy composite materials.According to the method, nickel nitrate hexahydrate, ammonium fluoride and urea are selected for preparing a reaction solution, a high-temperature sealed reaction is conducted for sample manufacturing, the sample is made to react with phosphorus powder to manufacture pure-phase NixPy, and the pure-phase NixPy is prepared; according to the preparation method, NixPy-NixSy is used as a raw material and further reacts with sulfur powder to generate the composite material NixPy-NixSy, so that the NixPy-NixSy composite material with regular morphology and excellent dispersity is formed, the NixPy-NixSy composite material has relatively large specific surface area and forms more active contact positions, and meanwhile, the reaction temperature of the synthesis method is far lower than the high temperature required by other methods, so that the particle size is convenient to control, and the preparation method is suitable for industrial production. Therefore, the turnover frequency and the relative reactivity of the crystal face are convenient to estimate, the emission of toxic and harmful gas PH3 is reduced, the phosphating efficiency is remarkably improved, and the transition metal phosphorus sulfide is applied to the field of humidity sensitivity for the first time to construct a novel humidity sensor.

The invention discloses a storage battery module for quickly responding humidity change. A humidity-sensitive sensor module is mounted outside the storage battery module, so that the humidity-sensitive sensor module can detect the change of humidity in the ambient environment of the humidity-sensitive sensor module in the using process of a storage battery, and the storage battery can be well protected; the humidity-sensitive sensor module is creatively designed in the aspects such as the sensitive material, manufacturing condition and structure of the sensor, so that the storage battery module is high in response speed, high in sensitivity and good in test repeatability, an unexpected technical effect is generated, and the storage battery module has great market application prospects.

The invention relates to an ionic-type polyhedral oligomeric silsesquioxane (POSS) block copolymer based humidity sensor and a preparation method thereof. The humidity sensitivity performance of the ionic-type POSS block copolymer based humidity sensor is improved through solvent annealing and porous CuO doping methods. An ionic-type POSS block copolymer selects a POSS grafted methyl methacrylatetype-sulfonated styrene block copolymer prepared by the research group, two types of topological structures, namely the star type and the tadpole type, of the polymer and the different block ratios (1:1)-(1:3) are researched, the humidity sensor with the excellent humidity sensitivity performance is prepared, through solvent annealing, hydrophilic and hydrophobic phases of the humidity sensor arepromoted to be separated, the durability and mechanical properties of a humidity sensitive material can be improved significantly, and the sensitivity of the ionic-type POSS block copolymer based humidity sensor is advantageously improved through doping of porous CuO.

The invention discloses a humidity sensor film based on a microregion redissolution reaction and a preparation method thereof, and belongs to the technical field of the composite material and humidity sensor. The preparation method comprises the following steps: based on the technology and feature of an atomization process, such as the gas release, dissociating uniform solution to micron-type microdrops, conveying the microdrops to a film formation substrate by the gas, forming the micron-type redissolution reaction microregion in the guide layer film, and reacting by two or more materials in the microregion and finishing the film deposition process. The preparation method is capable of overcoming the problem in the traditional film preparation process that two or more materials cannot form the film because of the reaction deposition between the materials or the bad effect of the solution dispersion state caused by the generation. The humidity-sensitivity film prepared by the preparation method is capable of obviously improving the sensor feature characters, such as wet hysteretic property, because of the physical and chemical reactions, such as the bonding between the materials, and the electrostatic adsorption.

The invention relates to a core shell structure n - titanium dioxide @ p - cobalt titanate nanocrystalline thin film and a preparing method thereof. A clean substrate is installed on a sample stage of a magnetron sputtering device firstly, and a CoTiO3 target and a TiO2 target are installed at two radio frequency target positions of the magnetron sputtering device correspondingly; a sputtering film coating chamber of the magnet control sputtering device is vacuumized and injected with inactive gas, and gas pressure of the sputtering film coating chamber is kept at 0.1Pa - 2Pa; the CoTiO3 target is pre-sputtered for 5min - 15min; the substrate is heated up to 300 DEG C - 600 DEG C and is subjected to heat preservation, sputtering of the CoTiO3 target is started for 30min - 90min, and a CoTiO3 orderly nanocrystalline thin film is obtained; and the CoTiO3 orderly nanocrystalline thin film is adjusted to be parallel with the TiO2 target, the TiO2 target is sputtered for 10s - 120s, and the core shell structure n - titanium dioxide @ p - cobalt titanate nanocrystalline thin film is obtained. According to the core shell structure n - titanium dioxide @ p - cobalt titanate nanocrystalline thin film and the preparing method thereof, appearance of the thin film can be adjusted effectively, the film-forming property is good, operation is convenient, the producing period is short, efficiency is high, and the core shell structure n - titanium dioxide @ p - cobalt titanate nanocrystalline thin film and the preparing method thereof are suitable for industrial production.

A curable composition includes a specific infrared absorber and a curable compound and has specific wavelength characteristics.