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255 results about "Particle adsorption" patented technology

In analogy to molecular systems, particle adsorption can be defined as a process leading to a significant increase in concentration occurring in a thin layer adjacent to an interface, usually liquid/solid or liquid/air.

Microfluid self-driven paper base micro-fluidic chip and preparation method and application thereof

ActiveCN105833926AFast auto passThe gap between hydrophilicity and hydrophobicity increasesMaterial analysis by observing effect on chemical indicatorLaboratory glasswaresFiberUltraviolet lights
The invention discloses a microfluid self-driven paper base micro-fluidic chip and a preparation method and application thereof .The preparation method comprises the steps that titanium dioxide particles are subjected to silanization treatment to obtain super-hydrophobic coating liquid, filter paper is soaked in the coating liquid, natural drying is performed at room temperature, and due to the fact that super-hydrophobic nano particles are adsorbed to filter paper filter, a super-hydrophobic filter paper piece of a micro-nano composite structure is obtained; the geometric dimension of the micro-fluidic chip is designed on a mask plate, regional selective exposure is carried out on the micro-fluidic chip through deep ultraviolet light (UV) under the assistance of the mask plate, and therefore the designed pattern of the micro-fluidic chip is copied to the filter paper; the micro-fluidic chip comprises the filter paper and a hydrophilic-hydrophobic layer coating the surface layer of the filter layer; the hydrophilic-hydrophobic layer is provided with at least one hydrophilic flow channel, gradient-changing hydrophilic patterns are designed in the hydrophilic flow channel, and wetting gradient is formed in the flow channel .The microfluid self-driven paper base micro-fluidic chip has the advantages that operation is easy, the manufacturing cost is low, the flow channel with the wetting gradient achieves self drive of microfluid, and the microfluid driving cost is greatly reduced .
Owner:ZHEJIANG UNIV OF TECH +1

Device for treating oil field waste water

A device used for treating oil field waste water is characterized of including a water inlet area, a reacting area and a water outlet area. The water inlet area comprises a waste water tank, a water inlet pump and a flowmeter; the water inlet pump is arranged at the outlet of the waste water tank and the flowmeter is arranged on the water inlet pipeline, the reacting area and a water outlet area are located inside the reacting groove, the reacting area is divided into a electrical floating region and a modified magnetic particle adsorption filtration region, wherein the electrical floating region comprises an electric plate the bottom of which is fixed on the device wall by insulation material, a guide flow inclined plate at a dip angle of 45 DEG-60 DEG with the level surface, a perforated pipe which is located on the bottom side of the guide flow inclined plate, a baffle plate located at the bottom and a oil collecting pipe. The modified magnetic particle adsorption filtration region includes a porous plate, a separating plate and modified magnetic particles, wherein the modified magnetic particles are placed in an iron frame. The water outlet area is located on the opposite side of the water inlet area. The disposal unit of the invention is small and compact, the electric devices are less, the power consumption is low and direct current is employed, thereby having low cost working, convenient operation, automatic control and better operability for utilization of actual project.
Owner:溧阳常大技术转移中心有限公司

Moistening mask liquid without emulsifier and preparation method thereof

The invention provides a moistening mask liquid without an emulsifier. The moistening mask liquid comprises, by weight, 5 to 12% of a humectant, 0.5 to 3.0% of a suspension stabilizing agent, 1 to 10% of grease, 1.0 to 5.0% of a water-soluble active substance, 0.5 to 5.0% of a fat-soluble active substance, 1.0 to 10% of plant extract and 0.01 to 0.3% of a pH value conditioning agent, with the balance being deionized water, wherein the grease is one or more selected from the group consisting of sunflower oil, jojoba oil, avocado oil, olive oil, aloe oil and sweet almond oil, and the suspension stabilizing agent is a three-dimensional stabilizing agent prepared by coating a microcrystalline cellulose porous particle with a particle size of 0.1 to 20 [mu]m with xanthan gum or carboxymethylcellulose sodium. The mask liquid provided by the invention employs the microcrystalline cellulose porous particle in the suspension stabilizing agent to absorb grease with the dissolved fat-soluble active substance and uses xanthan gum or carboxymethylcellulose sodium for suspension adsorption of the porous particle with grease, so the stable mask liquid without any emulsifier is formed; and the mask liquid has no irritation to the skin, and supplements water to the skin and moistens the skin when used, and microcrystalline cellulose particles in a specific particle size range can provide the skin with slippery sensation.
Owner:广东龙湖科技股份有限公司

Green carbon dioxide supercritical fluid semiconductor cleaning equipment

The invention discloses green carbon dioxide supercritical fluid semiconductor cleaning equipment which is used for cleaning semiconductor silicon wafers without water. The equipment comprises a main working chamber for carrying out supercritical fluid cleaning and supercritical drying, a separating chamber for separating carbon dioxide and cleaning waste liquid, a temporary storing tank for storing a cleaning agent for enhancing the cleaning effect and a cosolvent, a carbon dioxide circulation control system for compressing, cooling and storing the carbon dioxide, and the like. all parts are connected by a pipeline with a valve. Under the cooperation of a small amount of organic solvent, the carbon dioxide without surface tension is taken as a cleaning medium and a rinsing solution to go deep into tiny holes to obtain good cleaning and drying effects. By utilizing the equipment, massive consumption of pure water and the pollution brought by chemical agents are avoided, and the problems of structure deformation, particle adsorption and the like caused by the surface tension in the traditional process are solved, and the cycle use of the carbon dioxide reduces the massive discharge of greenhouse gases.
Owner:INST OF MICROELECTRONICS CHINESE ACAD OF SCI

Method of detecting pathogeny based on optical microfluidic chip of magnetic microparticles

The invention discloses a method of detecting pathogeny based on an optical microfluidic chip of magnetic microparticles, wherein the optical microfluidic chip of the magnetic microparticles is provided with at least a reaction tank; a prefixed antibody, namely the magnetic microparticles are arranged at the inner side of a top cap of the reaction tank; a prefixed and paired specific recognition monoclonal antibody or polyclonal antibody is arranged at the bottom side of the reaction tank through imprinting by a tamp or through micro-nano sample application; the method comprises the following steps: the determinand in a sample to be detected and the antibody, namely the nanometer magnetic microparticles in the reaction tank are performed a conjugation reaction; the antibody, namely the nanometer magnetic microparticles move up and down in the reaction tank under the action of further changing a magnetic field, and the contact between the antibody, namely the nanometer magnetic microparticles and the determinand in the sample to be detected is increased, thus the speed of reaction and combination is improved, and the reaction time is reduced. Extra magnetic microparticles are further adsorbed to the inner side of the top cap of the reaction tank through changing the direction of the magnetic field; the magnetic microparticles combined with the determinand are fixed at the bottom side of the reaction tank through the action of combining of the paired antibody; the concentration of the determinand is proportional to the density of the nano magnetic microparticles fixed at the bottom side of the reaction tank finally.
Owner:INST OF ELECTRONICS CHINESE ACAD OF SCI

Electrostatic lampblack purifier

The invention relates to the field of lampblack purification equipment, in particular to an electrostatic lampblack purifier. The purifier comprises a housing, and a front filtering and purifying device, a high-voltage ionization field, a low-voltage electrostatic adsorption field, an axial flow fan and a rear filtering and purifying device are sequentially arranged in the shell from left to right. The low-voltage electrostatic adsorption field comprises an electrode plate group and a driving box, a driving mechanism and a lifting mechanism are arranged on the driving box, an oil scraping mechanism used for scraping oil stains on the electrode plate group is arranged on electrostatic lampblack purifier utilizes an air flow as driving force to allow the lifting mechanism to drive the oil scraping mechanism to perform oil scraping operation on the electrode plate, so that real-time cleaning of the electrode plate is achieved, the service life of the electrode plate is prolonged, the electrode plate is kept in a stable and efficient oil mist particle adsorption effect all the time, the lampblack purification efficiency is improved, the electrode plate does not need to be disassembledand cleaned, time and labor are saved, and the maintenance cost of the lampblack purifier is greatly reduced.
Owner:北京鑫皓超燃厨具设备有限公司

Method for developing latent fingerprints through multi-metal deposition technology

InactiveCN103784149ALatent fingerprint effect is goodLow costPerson identificationLatent fingerprintBiological activation
The invention relates to a method for developing latent fingerprints through a multi-metal deposition technology, and belongs to the technical field of fingerprint identification. According to the method, silver particles and copper particles are successively deposited at fingerprint ridge line areas selectively so as to enable the fingerprint ridge line areas to be ash black while enabling valley line areas not to change, and therefore fingerprint morphology is developed. The method specially comprises the steps that a silver nitrate solution is used for activating the fingerprints, a fingerprint check material is immerged in a copper salt solution, and generated copper nano particles are adsorbed onto silver nano particles generated through activation. According to the method, latent fingerprints on various types of objects such as glass, stick band, ceramics and paper can be developed. Compared with an existing multi-metal deposition technology in which gold is used firstly and then silver is used, the method innovatively enables silver nano materials to be used before copper nano materials, so that the sensitivity and the resolution ratio of fingerprint development are greatly improved, meanwhile, the method is simple to operate, environmentally friendly, rapid, good in repeatability and low in cost, and greatly improves practical application value of the multi-metal deposition technology in latent fingerprint development.
Owner:UNIV OF SCI & TECH BEIJING

Electrostatic cooking fume purification device and range hood with same

The invention relates to an electrostatic cooking fume purification device and a range hood with the same. The electrostatic cooking fume purification device comprises a shell, a dust collection electrode, an ionization electrode and an adjusting structure. The dust collection electrode comprises at least two dust collection plates which are parallelly arranged at intervals; the ionization electrode comprises polar plates and polar filaments, closed frames are formed by the polar plates, and at least two of the polar filaments are arranged in each frame at intervals; each polar plate is arranged between the two corresponding adjacent dust collection plates, and the distances from the polar plates to the adjacent dust collection plates are equal to one another; the distances between the adjacent dust collection plates can be adjusted by the adjusting structure. The electrostatic cooking fume purification device and the range hood has the advantages that the distances between the dust collection plates can be reduced by the adjusting structure when cooking fume is high in concentration, accordingly, the field intensity at identical voltages can be increased, and the cooking fume particle adsorption capacity can be improved; the distances between the dust collection plates can be increased when the cooking fume is low in concentration, accordingly, the field intensity at the identical voltages can be reduced, energy can be saved, and the service cost can be lowered.
Owner:NINGBO FOTILE KITCHEN WARE CO LTD

Ultrahigh-characteristic-value three-phase flue gas foam for oil-gas field and preparation method thereof

The invention discloses ultrahigh-characteristic-value three-phase flue gas foam for an oil-gas field and a preparation method thereof. The three-phase flue gas foam is composed of a gas phase, a liquid phase and a solid phase, wherein the gas phase is flue gas produced by a coal-fired power plant; the liquid phase is a water solution of a surfactant, a pH (Potential of Hydrogen) value regulator and inorganic salt; the solid phase is a compound of fly ash and nano silicon dioxide; and the characteristic value of the foam is 90 to 99 percent. According to the ultrahigh-characteristic-value three-phase flue gas foam disclosed by the invention, a used solid-phase foam stabilizer is a compound system of fly ash particles and nano silicon dioxide particles; the cost is relatively low and a stable solid-phase particle adsorption layer can be formed on a foam liquid membrane; and unstable characteristics including liquid membrane cracking of the foam, gas dispersion, foam coalescence and thelike are greatly weakened and the stability of the foam is effectively improved. The ultrahigh-characteristic-value three-phase flue gas foam system disclosed by the invention can be adaptive to hightemperature of 230 DEG C and the stability is enhanced along the rising of pressure; and the ultrahigh-characteristic-value three-phase flue gas foam has good temperature resistance and pressure resistance and can be applicable to development operation of high-temperature and high-pressure oil and gas reservoirs.
Owner:CHINA UNIV OF PETROLEUM (BEIJING)
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