453 results about "Aqueous droplet" patented technology

The invention relates to the technical field of super-hydrophobic anti-icing coatings, in particular to a low-temperature thermochromic super-hydrophobic anti-icing coating and a preparation method thereof. According to the specific technical scheme, low-temperature thermochromic phase change microcapsules and nanoscale hydrophobic silicon dioxide particles are dispersed in an organic solvent, an adhesive and a curing agent are added, and the super-hydrophobic surface with the micro-nano hierarchical structure, the latent heat regulation function and the temperature visual feedback function is constructed through a spraying method. The obtained coating has excellent super-hydrophobicity, and water drop adhesion can be effectively reduced; the phase change microcapsules contained in the coating release latent heat during low-temperature solidification, and surface temperature reduction and icing are remarkably delayed; and meanwhile, the color of the coating is obviously and reversibly changed along with the reduction of the temperature, so that the visual early warning of the low-temperature icing risk is realized. The problems that a traditional super-hydrophobic coating is insufficient in low-temperature anti-icing long-term effect and lacks an early warning function are solved, the super-hydrophobic coating is suitable for low-temperature anti-icing occasions, and the sensing-regulation-protection integrated function is achieved.

The invention discloses a Cl-Bi carbon dioxide reduction electrocatalyst, a preparation method thereof and application of the Cl-Bi carbon dioxide reduction electrocatalyst in preparation of formic acid through catalytic reduction of carbon dioxide, and belongs to the technical field of electrocatalyst materials. The preparation method comprises the following steps: preparing a sodium chloride solution, adjusting the pH value with acid, adding Bi2O3, carrying out a stirring reaction, washing a reactant, and drying to obtain BiOCl; the preparation method comprises the following steps: dispersing BiOCl, carbon black and naphthol in ethanol, carrying out ultrasonic treatment to obtain ink, dripping the ink onto hydrophobic carbon paper, drying, and reducing under negative voltage to obtain the Cl-Bi carbon dioxide reduction electrocatalyst. The prepared Cl-Bi carbon dioxide reduction electrocatalyst is simple in preparation method, free of pollution, rich in raw material and low in price, and the Cl-Bi carbon dioxide reduction electrocatalyst has high formic acid production selectivity, high formic acid yield and excellent stability.

The present invention discloses a preparation method of a photothermal super-hydrophobic coating with excellent anti-icing / de-icing performance under a low temperature and high relative humidity environment, first by in situ growth of photothermal Cu-MOF nanoparticles on the surface of low thermal conductivity fibrous clay mineral nanoparticles, constructing a two-level nano- / nano-structured composite photothermal particle, which is then subjected to low surface energy modification and introduced into a low thermal conductivity binder, and a binder is induced to phase separate to form a micron-scale binder / low surface energy nanoparticle aggregate by a non-solvent, and finally a photothermal super-hydrophobic coating with a three-level micro- / nano- / nano-structure is constructed by spraying. The three-level micro- / nano- / nano-structure of the coating simultaneously gives the coating excellent photothermal performance and the Cassie-Baxter state stability of the droplet on the coating surface under a low temperature and high relative humidity environment, so that it has excellent passive anti-icing / frosting and active de-icing / defrosting performance in this environment. The low thermal conductivity of the coating further suppresses the heat exchange between the substrate-water droplets, so that the passive anti-icing / frosting performance of the coating is further improved. In addition, the present invention has the advantages of simple preparation method and large-area preparation, laying a solid foundation for the practical application of photothermal superhydrophobic anti-icing coatings.

Provided herein are methods for replenishing dissolved gas to aqueous droplets on a digital microfluidic device. Provided herein are methods of cell-free protein synthesis, optimized cell-free protein synthesis (CFPS) reagents, and methods for optimizing CFPS reagents to increase protein expression yield. The method is suitable for protein expression on microfluidic devices having hydrophobic surfaces by circulating a fill fluid to introduce additional oxygen.

The present invention discloses a transparent super-hydrophobic cultural relic protection material and a preparation method thereof. The method first grafts a hydrolyzed silane coupling agent onto the surface of silica, and then utilizes the amino group of the hydrolyzed silane coupling agent to react with the carboxyl group of a chain fatty acid to graft a chain alkyl group onto the surface of silica particles. The prepared material has excellent super-hydrophobicity, a large contact angle of water droplets on the coating surface, and a small rolling angle, making it difficult for water droplets to stay on the coating surface, thereby effectively preventing moisture penetration. At the same time, due to the transparency of the silica particles and the chain fatty acid, the coating can maintain a high transparency and will not block or change the original color and pattern of the cultural relic. The silane coupling agent acts as a bridge connecting the silica particles and the chain fatty acid, which can enhance the chemical bonding inside the coating, making the coating less prone to aging and cracking, and giving the material good high-temperature resistance and the advantage of resisting ultraviolet light, thereby extending the preservation life of the cultural relic.

1. The name of the design product: water droplet humidifying aromatherapy machine (KJR-321). 2. The use of the design product: for increasing air humidity and air fragrance by atomizing and volatilizing water and spices. 3. The design points of the design product: in shape. 4. The picture or photo best indicating the design points: perspective view.

A three-dimensional ice accretion reconstruction method and apparatus for a fan blade, and a device and a storage medium. The method comprises: using a cross-sectioning method to cut a fan blade, so as to obtain two-dimensional airfoil-section coordinate data of each position; performing airflow field calculation on each two-dimensional airfoil section, so as to obtain an external airflow velocity of each two-dimensional airfoil section; performing force analysis on water droplets, calculating impingement positions of the water droplets on each two-dimensional airfoil section, and then calculating a local water droplet impingement coefficient and a freeze fraction; on the basis of the local water droplet impingement coefficient, the freeze fraction and environmental parameters, acquiring the thickness of an ice accretion on each two-dimensional airfoil section and an ice accretion shape on each two-dimensional airfoil section; on the basis of the thicknesses of the ice accretions, updating the two-dimensional airfoil-section coordinate data; performing ice accretion calculation at the next time step until a preset condition is met; and performing lofting processing on each two-dimensional airfoil section, so as to obtain a three-dimensional ice accretion shape result of the fan blade. The increased thicknesses and shape of ice accretions of a fan blade under different working conditions are quickly obtained with a small amount of calculation.

The invention discloses a preparation method of composite hydrogel microparticles triggered by PH (Potential of Hydrogen). According to the method disclosed by the invention, emulsion templates in different forms are constructed, and acetic acid molecules in an oil phase are diffused to enter water-phase liquid drops so as to lower the pH value of a chitosan-alginic acid homogeneous solution, so that chitosan is protonized and is subjected to ionic crosslinking with alginic acid carboxyl; further, the preparation of chitosan-alginic acid composite microspheres, microcapsules and core-shell hydrogel microparticles is realized. The prepared composite hydrogel microparticles show good morphology stability, monodispersity and a certain autofluorescence characteristic. Meanwhile, no organic solvent or harmful cross-linking agent is used for microsphere forming, and the prepared microparticles have good application prospects.

The invention is suitable for the technical field of hygroscopic materials, and provides a hygroscopic material based on a polymer film and a preparation method and application thereof. The hygroscopic material is based on a polymer film, an activated area is formed on the surface of the polymer film through plasma activation treatment, and then a modified area is formed on the surface of the polymer film through chemical adsorption and silanization reaction; the modified area is used for capturing water vapor and condensing and gathering into liquid drops, and the activated area is used for reducing water drop sliding angle and contact angle lag and promoting liquid drop conveying. The moisture absorption material with a hydrophilic-hydrophobic dual-function (Janus) structure is constructed, efficient moisture absorption and droplet aggregation can be achieved, and the requirement for small-area dehumidification is met; the system realizes dehumidification by virtue of physical and chemical characteristics of the moisture absorption material, and is low in energy consumption, energy-saving and environment-friendly; the optimized dehumidification process ensures that the moisture absorption material is recycled for multiple times without reducing the performance, the service life of equipment is effectively prolonged, and the maintenance frequency is reduced; the system adopts a miniaturized design, and is suitable for distributed and small-area application.

A spectrophotometric system and method for quantifying water content in a liquid hydrocarbon stream is disclosed. The system can include at least one light source that produces a light having a desired wavelength and a flow chamber that allows passage of a sample of the liquid hydrocarbon stream. The light is configured to pass through the liquid hydrocarbon stream within the flow chamber. The system can also include at least one photosensitive detector array that measures an intensity of the light at one or more desired wavelengths of the light after it passes through the liquid hydrocarbon stream in the flow chamber. The intensity measurement of the at least one photosensitive detector array is used to quantify the undissolved water content of the liquid hydrocarbon stream.

The invention belongs to the technical field of plate preparation, and particularly relates to a galvanized plate special for household appliances and a preparation method thereof. The surface of the galvanized sheet contains a hydrophobic coating, and the hydrophobic coating comprises the following raw materials in parts by mass: 60-80 parts of organic silicon modified polyurethane, 5-15 parts of carbon nanotubes, 5-10 parts of large-particle-size inorganic nanoparticles, 1-5 parts of small-particle-size inorganic nanoparticles, 0.1-3 parts of a flatting agent, 0.1-2 parts of a defoaming agent and 50-1000 parts of a solvent. By compounding the linear curled carbon nanotubes, the small-particle-size inorganic nanoparticles and the large-particle-size inorganic nanoparticles, the dispersity of the filler in the coating can be improved, the roughness of a micro-nano rough structure on the surface of the coating is greatly improved, an air cushion layer exists in the structure, when water drops make contact with the rough surface, the air cushion layer lifts the rough surface, and the surface of the coating is protected. And the grooves on the rough surface cannot be filled with water drops, so that the coating has super-hydrophobic capacity.

The utility model discloses a desorption device for carbon dioxide capture, which relates to the field of carbon dioxide capture and comprises a shell and a demister arranged in the shell, and a drainage mechanism is arranged below the demister. The drainage mechanism comprises a fixing rod fixedly connected to the demister, and an inclined drainage plate is arranged on the fixing rod. According to the desorption device for capturing the carbon dioxide, the inclined drainage plate is arranged below the demister, and the lower end of the drainage plate can be communicated with the collecting device, so that when water drops in the demister drop, part of the water drops drop on the drainage plate and flow into the collecting device along the drainage plate, and the water drops in the demister are separated from the collecting device. The amount of water drops falling into the rich solution is reduced, so that the desorption efficiency of the rich solution can be improved; part of water drops are blocked by the drainage plate, so that the probability that carbon dioxide is brought into the rich solution again by the water drops can be reduced, and the desorption efficiency is further improved.

The invention relates to a polypropylene hydrophilic modification method, an obtained material and a container cover prepared from the material. The hydrophilic modification method of the polypropylene comprises the following steps: uniformly mixing the components of the raw materials; adding the mixture into a double-screw extruder for melt grafting; and cooling the polymer melt extruded by the twin-screw extruder with water to obtain solid polymer strips, drying the polymer strips, and granulating to obtain hydrophilic polypropylene particles, namely the hydrophilic polypropylene composite material. The high-performance hydrophilic polypropylene composite material disclosed by the invention has excellent mechanical properties, the hydrophilic performance is also greatly improved, and the preparation process is simple. According to the container cover made of the material, the problems that water drops adhere to the container cover due to water vapor condensation and water drops scatter when the container cover is opened can be solved, the water drop phenomenon is improved into the water film phenomenon, the water drops scatter when the container cover is opened is avoided, the volatilization speed of water on the surface of the container cover is increased, and therefore the use dryness is enhanced, and the use experience of a user is improved.

The present technology presents an apparatus for cleaning the air and surfaces within an enclosed space of a viral, microbial, or malodor contamination. In an exemplary embodiment, the apparatus includes: a container configured to contain a water and a solid or gel pack that releases the gaseous cleaning agent upon contact with the water; an aerator housed in the base of the container; an air distributor in the container configured to distribute air from the aerator into the container to cause agitation of the water and release of gaseous agent; and a lid on the container having an opening configured to accelerate an air-borne spray of gaseous agent and water droplets therethrough into the surroundings.

The invention relates to the technical field of coating preparation, and provides a super-hydrophobic oleophobic epoxy anticorrosive wear-resistant powder coating and a preparation method thereof. According to the coating, phenolic epoxy resin and bisphenol A epoxy resin are used as matrix resin, phenolic hydroxyl resin is used as a curing agent, super-hydrophobic / oleophobic carbon nanotubes are used as a modifier, ethylene-tetrafluoroethylene copolymer and polyamide resin are used as flexibilizers, super-hydrophobic / oleophobic nano silicon dioxide powder and super-hydrophobic hollow glass beads are used as fillers, and the super-hydrophobic / oleophobic nano silicon dioxide powder and the super-hydrophobic hollow glass beads are used as fillers. The super-hydrophobic and oleophobic epoxy anti-corrosion wear-resistant powder coating is prepared by taking an inorganic pigment as a coloring agent through the steps of material preparation, premixing, melt extrusion, tabletting, cooling, crushing and sieving under the cooperation of various functional assistants. The powder coating is subjected to electrostatic spraying (40-70 KV), the coating film thickness is about 350 microns, and the powder coating is cured into a film after being subjected to hydrophobic / oleophobic min at 180 DEG C / 5 min or 230 DEG C / 1.5 under the baking condition of 180 DEG C / 5 min. The contact angles of oil drops and water drops can reach 160 degrees and 161 degrees respectively, and the rolling angles are 2 degrees and 1 degree respectively.

The utility model belongs to the technical field of bean product sterilization, particularly relates to efficient and energy-saving bean product sterilization equipment, and aims to solve the problems that a water guide disc is arranged at the lower part of an existing tray, so that the sterilization operation of water vapor on the lower part of a sample is influenced, dripped water drops influence the sample at the lower part, and a large amount of heat is taken away when collected water is directly discharged. According to the technical scheme, the sterilization device comprises a sterilization box, the sterilization box is provided with a steam generator for producing sterilization steam, a cavity for providing saturated sterilization steam is formed in the sterilization box, a frame body is placed in the cavity, a plurality of material trays are placed on the frame body, and samples to be sterilized are placed on the material trays; according to the sterilization device, no dead angle exists in the sterilization process, condensate water can be collected and guided to the bottom recycling pool after dropping, a sample on the lower portion is not affected, the condensate water with heat in the recycling pool can be circularly taken for use, and the sterilization device is more energy-saving and environmentally friendly.

The invention discloses a high-performance anti-pollution zwitter-ion nanofiltration membrane and a preparation method and application thereof, the method comprises the following steps: S1, immersing a support base membrane in deionized water, and then adhering the support base membrane to the bottom of a glass plate; s2, soaking the supporting base membrane in an inorganic phase solution, and then drying until no obvious water drops exist on the surface; s3, the supporting base membrane is soaked in an organic phase solution, a thin polyamide layer is formed on the surface of the supporting base membrane, then heat treatment is carried out, and the organic phase solution comprises multiple acyl chloride monomers and a solvent; s4, soaking the membrane prepared in the step S3 in a grafting solution for surface grafting, and then performing heat treatment to obtain the high-performance anti-pollution zwitter-ion nanofiltration membrane. Through a synergistic modification strategy, the microstructure and surface properties of the nanofiltration membrane are optimized, and the properties of the traditional nanofiltration membrane are improved.

The embodiment of the invention provides a carbon nanotube / fluorocarbon resin composite microsphere photo-thermal super-hydrophobic anti-condensation coating and a preparation method thereof.The preparation method comprises the steps that firstly, carbon nanotubes and fluorocarbon resin are evenly dispersed in a solvent, then a small amount of non-solvent water is added to enable a solution system to be subjected to phase separation, and carbon nanotube / fluorocarbon resin composite microsphere dispersion liquid is formed; and finally, spraying the carbon nanotube / fluorocarbon resin composite microsphere dispersion liquid, and curing to obtain the photo-thermal super-hydrophobic anti-condensation coating. The carbon nano tube is in a microsphere shape in the coating, so that a typical micro / nano coarse structure is obtained on the surface, the water drop contact angle of the coating is as high as 158 degrees, the icing delay time is as high as 434s, and the ice adhesion force is as low as 16kPa; under the irradiation of sunlight, the temperature of the coating can be increased to 54.5 DEG C within 10 minutes under the photo-thermal action of the carbon nanotubes, so that the melting of ice is accelerated.

This invention relates to the field of water droplet impact experiment technology, and particularly to a method, apparatus, and impact experiment method / system for forming large supercooled and supercooled water droplets. The method for forming large supercooled and supercooled water droplets includes: forming large water droplets; controlling the large water droplets to be in a suspended state; lowering the temperature of the large water droplets; and obtaining a first temperature of the large water droplets, wherein a large supercooled and supercooled water droplet is considered to be a large supercooled and supercooled water droplet when the first temperature is less than -10°C. The impact experiment method for large supercooled and supercooled water droplets includes: forming supercooled water droplets according to the method; controlling the free fall of the supercooled water droplets to impact a substrate; obtaining images of the dynamic phenomena of the supercooled water droplets impacting the substrate; and obtaining the mathematical model required for the experiment based on the images. This invention can achieve accurate and efficient control of the temperature of the supercooled water droplets, while accurately observing the phase transformation and nucleation phenomena during the impact experiment, facilitating the more realistic formation of the mathematical model required for the experiment.

1. Name of the product in this design: Tissue Box (Water Drop). 2. Purpose of this design: For use in tissue boxes. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

Provided is a cellulose ester composition that has good flowability, and a molded product obtained therefrom that is a molded product in which water droplet marks are inhibited from occurring. A cellulose ester composition contains: (A) 100 parts by mass of a cellulose ester; (B) 19 to 45 parts by mass of a citric acid ester compound having a solubility in water of 2 g / 100 ml or less; and (C) 1 to 9 parts by mass of an adipic acid ester compound.

The application relates to a super-hydrophobic cotton fabric and a preparation method thereof. The fabric can be prepared by the following method: firstly, a pore-forming agent and polystyrene are dissolved in dimethylformamide to prepare a spinning solution; secondly, the cotton fabric is pretreated; thirdly, the spinning is performed by using an electrostatic spinning technology; and finally, the super-hydrophobic cotton fabric is prepared by washing under the assistance of ultrasonic waves. The super-hydrophobic cotton fabric prepared by the application contains the hydrophobic material polystyrene on the surface, the apparent contact angle of water drops on the surface of the cotton fabric ranges between 151 DEG and 154 DEG, the super-hydrophobic property is very good, the hydrophobic property of the cotton fabric is not obviously weakened after 10 times of washing, and this indicates that the hydrophobic material polystyrene can be firmly attached to the surface of the cotton fabric.

Device for producing a solid cryogenic abrasive from water, characterized in that the cryo-tube and loading unit form a single unit, wherein one or more spray nozzle blocks, equipped with identical or different interchangeable spray nozzles, are arranged in the cone of the cryo-tube such that the water can be sprayed from below into a cold nitrogen atmosphere of the cryo-tube, and the amount of nitrogen required for ice formation can be introduced from nitrogen nozzles attached to the tube and the lid, and the frozen water droplets immediately fall from the cryo-tube into the loading unit for absorption into the transport gas stream, assisted by the gas pressure generated during freezing.

5 Disclosed is a process for capturing multi-gas emissions. The process comprises passing multi-gas emissions through a reactor unit, spraying any one of sodium hydroxide, fly ash, fly ash-slaked / quick lime mixture, fly ash- steelmaking residue mixture, slaked lime- steelmaking residue mixture, red mud and red mud-fly ash mixture, over the multi-gas emissions in the reactor unit; and capturing water droplets coming along the multi-10 emissions using a demister unit.

The invention discloses a high-yield method for reducing dinitro and retaining sensitive protecting groups, which comprises the following steps: adding water, sodium dithionite and sodium carbonate into a container, stirring and clarifying, and dropwise adding a mixed solution containing raw materials; after the reaction is finished, extracting, separating liquid, concentrating, and purifying by silica gel column chromatography to obtain a product and a byproduct; the raw material is a compound containing a carbon-carbon double bond, a p-methoxybenzyl protecting group, a t-butyloxycarboryl protecting group and dinitro. Adding a byproduct into a phosphoric acid mixed solution for reaction; and after the reaction is finished, adding dichloromethane and water, dropwise adding triethylamine to adjust the pH value, extracting, separating liquid, drying, concentrating, and purifying by silica gel column chromatography to obtain the product. According to the method, a sodium hydrosulfite / sodium carbonate system and phosphoric acid step-by-step treatment strategy is adopted, reduction of dinitro is achieved under mild conditions, meanwhile, PMB protecting groups, Boc protecting groups and C-C double bonds are reserved, and the problem that stability and high yield of the protecting groups cannot be considered at the same time in an existing method is solved.

Provided herein are methods, and compositions for the detection and analysis of biomolecule interactions a microfluidic device. The detection and analysis occurs in aqueous droplets within an oil layer having surfactants.

Provided are a fluorine-containing ether composition and a coating liquid which are capable of forming a surface layer having excellent water droplet slipping properties, and an article having a surface layer having excellent water droplet slipping properties. A fluorine-containing ether composition containing a fluorine-containing ether compound (A) and a fluorine-containing ether compound (B), the compound (A) and the compound (B) each having a poly (oxyperfluoroalkylene) chain, a perfluoroalkyl group bonded to one end thereof, and a group represented by formula (I), in the combination of the compound (A) and the compound (B) contained in the composition, the number of carbon atoms of the perfluoroalkyl group contained in the compound (A) is less than the number of carbon atoms of the perfluoroalkyl group contained in the compound (B), and the content of the compound (A) is 30-95 mass% with respect to the total amount of the compound (A) and the compound (B). In-SiRnL3-n (I), L is a hydroxyl group or a hydrolyzable group, R is a hydrogen atom or a monovalent hydrocarbon group, and n is an integer of 0-2.

The invention belongs to the technical field of oil exploitation, and particularly relates to a fracturing fluid thickening agent as well as a preparation method and application thereof. The preparation method comprises the following steps: adding aminomethane tripropionic acid, ethanol and allyl chloride into a first reactor, carrying out a heat preservation reaction, and carrying out reduced pressure distillation to obtain a first functional monomer; adding 3-amino-1, 5-naphthalene disulfonic acid disodium salt, ethanol and allyl chloride into a second reactor, carrying out a heat preservation reaction, and carrying out reduced pressure distillation to obtain a second functional monomer; adding acrylamide, 1, 5-hexadiene-3, 4-diol, 3-[(3-acrylamidopropyl) dimethylammonium] propionate, a first functional monomer, a second functional monomer, monopotassium phosphate and water into a third reactor, dropwise adding an initiator, carrying out heat preservation reaction, adding ethanol, separating out precipitate, centrifuging to obtain a solid, and drying overnight to obtain the thickening agent. The thickening agent provided by the invention has the advantages of high apparent viscosity, strong shear resistance and strong antibacterial ability.