3260 results about "Electrostatic adsorption" patented technology

The invention discloses cellulose hybrid aerogel for adsorbing microplastics as well as a preparation method and application of the cellulose hybrid aerogel. Cellulose is extracted from agricultural solid wastes, and the cellulose surface contains abundant hydroxyl groups, so that a network structure can be formed through crosslinking, and the cellulose can be used as a matrix of aerogel; vermiculite with a layered structure is used as a reinforcing component, the structural stability of the aerogel is improved through uniform dispersion in the aerogel, the specific surface area of the vermiculite is large, hydroxyl is contained in a crystal structure, hydrogen bonds can be formed for interaction, and adsorption is facilitated; polyethyleneimine is adopted as a cellulose modifier, and a large number of amino groups beneficial to adsorption are introduced, so that the adsorption performance of the aerogel can be effectively improved. According to the method, agricultural solid wastes and vermiculite are taken as raw materials, and the prepared cellulose hybrid aerogel has the advantages of high porosity, large specific surface area, convenience in recovery and the like, can form hydrogen-bond interaction and electrostatic adsorption with micro-plastics, and not only has excellent adsorption performance, but also has relatively good repeated recycling performance.

The invention relates to protein nanoparticles for treating ulcerative colitis as well as a preparation method and application thereof, and relates to the field of nano pharmaceutical preparations. 5-aminosalicylic acid is encapsulated in zein to achieve the purpose of improving the bioavailability of the 5-aminosalicylic acid by preparing protein nanoparticles of a targeted inflammation colon part, mannose grafted hyaluronic acid is used as a stabilizer to be attached to the surfaces of the zein nanoparticles through electrostatic adsorption and hydrogen-bond interaction, and the bioavailability of the 5-aminosalicylic acid is improved. Mannose can be targeted to immune cells through a mannose receptor, and can be cooperated with 5-aminosalicylic acid to treat ulcerative colitis. The hyaluronic acid has the effects of stabilizing the protein nanoparticles and targeting macrophages and intestinal epithelial cell CD44 receptors in ulcerative colitis tissues, so that aggregation of the nanoparticles in the colitis tissues is mediated, the protein nanoparticles have the functions of resisting inflammation, resisting oxidation and repairing barrier injury, and a new research direction is provided for treatment of ulcerative colitis.

The invention relates to a full-automatic bag feeding packaging machine, and relates to the technical field of packaging equipment, the full-automatic bag feeding packaging machine comprises a base table, a rotating disc and a driving part, the rotating disc is provided with a clamping part, and the base table is sequentially provided with a bag feeding assembly, a bag opening assembly, a material injection assembly, a heat sealing assembly and a discharging assembly around the rotating disc; the bag feeding assembly comprises a clamping piece, two vertical plates and a lifting piece located between the two vertical plates. A barrier plate is fixedly arranged on the vertical edge of the same side of the two vertical plates, and a limiting piece is arranged on the vertical edge away from the barrier plate; the clamping piece comprises a connecting piece, a cross rod and a first power piece, a fixing block is fixedly arranged on the cross rod, and a clamping suction cup and a pressing part are fixedly arranged on the fixing block; an output shaft is fixedly arranged on the first power piece, and the first power piece drives the fixing block to rotate around the output shaft through the connecting piece. When the clamping suction cups clamp the uppermost packaging bag, the pressing part can press the upper side face of the packaging bag to enable the packaging bag to be bent, and the situation that two packaging bags are clamped at the same time due to electrostatic adsorption is reduced.

The invention discloses a high-temperature-resistant astaxanthin microcapsule and a preparation method and application thereof, and relates to the field of nutritional products, the microcapsule comprises: a, a core material: astaxanthin oil selected from haematococcus pluvialis or krill oil; b, double-layer wall materials: an inner-layer wall material is formed by crosslinking sodium alginate and whey protein through an ionic gel method; the outer-layer wall material is formed by electrostatic adsorption of chitosan and Arabic gum; and c, an antioxidant synergist: a rosemary extract. A double-layer embedding structure is adopted outside astaxanthin oil, sodium alginate on the inner layer is combined with whey protein to form a compact network structure through ionic bonds, chitosan on the outer layer and Arabic gum form a compact composite film on the surface of a primary embedded microsphere through electrostatic attraction, so that the double-layer embedded microcapsule has the advantages that the astaxanthin oil has good stability, and the astaxanthin oil has good stability. The temperature resistance limit of a traditional single-layer microcapsule is broken through, the stability of the astaxanthin in a high-temperature baking environment is remarkably improved, the astaxanthin can stably exist in high-temperature baked food, and the anti-oxidation effect and the like of the astaxanthin are fully exerted.

The invention provides an antibacterial synergy-mineralization regulation difunctional nano material as well as a preparation method and application thereof, and belongs to the technical field of biomedical materials. The preparation method comprises the following steps: mixing a disodium hydrogen phosphate solution and a calcium chloride solution to obtain an amorphous calcium phosphate suspension; mixing the amorphous calcium phosphate suspension with a tannic acid solution to obtain an ACP-TA suspension; and finally, mixing the ACP (at) TA suspension and the hydroxypropyl trimethyl ammonium chloride chitosan solution to obtain the bifunctional nano material. A cross-linked shell is formed through the electrostatic adsorption effect of tannic acid and hydroxypropyl trimethyl ammonium chloride chitosan of the antibacterial layer, amorphous calcium phosphate is effectively wrapped, the crystallization process of amorphous calcium phosphate can be remarkably delayed, long-acting release of calcium and phosphorus ions is ensured, the antibacterial function can be effectively achieved, and the service life of the coating is prolonged. An ideal local microenvironment is provided for remineralization of tooth hard tissue, and finally biomimetic mineralization of enamel and deep mineralization plugging of dentinal tubules are achieved.

The invention relates to the technical field of papermaking, and particularly provides high-strength tipping base paper for cigarettes and a preparation process of the high-strength tipping base paper. The tipping paper base paper for the cigarettes comprises a fiber raw material; functionalizing the nano cellulose; a cellulase; a dry strength agent; a wet strength agent; and a sizing agent. Nano cellulose is functionalized and a synergistic stepped enhancement mechanism is constructed, so that the synergistic breakthrough of the high-strength raw tipping paper for cigarettes in the aspects of strength, wet strength and air permeability is realized; after the functionalized nanocellulose is subjected to carboxylation treatment, the hydrogen bond and electrostatic adsorption between the functionalized nanocellulose and the fiber are enhanced, and the bonding strength in a dry state and a wet state is remarkably improved; meanwhile, the wet strength agent is added in stages, and the adsorption sequence of the dry strength agent is optimized, so that the reinforcing agent constructs a stable three-dimensional network framework in the paper sheet, and the end breaking risk under high-speed winding is effectively reduced.

The invention discloses an active oxygen scavenging drug-loaded targeted nano delivery platform based on diselenide bond bridging as well as a preparation method and application thereof, and belongs to the technical field of biological medicines. According to the invention, tetra (4-carboxyphenyl) porphyrin (TCPP) and manganese porphyrin (Mn-TCPP) are used as raw materials to synthesize an organic metal framework MOFs, a target drug is loaded on the MOFs through electrostatic adsorption / blending, and amino and diselenide bonds are linked on the MOFs to realize combination with a specific peptide ligand and promote release of a drug oxidative stress microenvironment. The nano delivery platform with specific targeting and ROS response performance is obtained. The specific treatment effect of different diseases is achieved through different selections of the loaded drugs and the specific peptide ligands.

The invention discloses a magnetic nano-enzyme probe and a preparation method thereof, a kit for detecting helicobacter pylori and application of the magnetic nano-enzyme probe, the core of the magnetic nano-enzyme probe is Fe3O4 nano-particles, magnetic enrichment capacity is provided, and interference of a complex matrix in a sample is eliminated; a layer of Pt nano-particles is electrostatically adsorbed through the cationic polymer to serve as a colorimetric interlayer, and a strong colorimetric signal is provided; au (at) Pt for modifying 5, 5 '-dithiobis (2-nitrobenzoic acid) is arranged on the surface layer and is used for providing strong catalytic signals and sites coupled with a large number of specific antibodies; meanwhile, the inner and outer layers of nano enzyme particles can synergistically enhance the catalytic action. The magnetic nano-enzyme probe disclosed by the invention has strong magnetic responsiveness, high colorimetric signal, strong catalytic activity and specific bacterium capturing capacity, realizes rapid enrichment and quantitative analysis of helicobacter pylori in a sample to be detected, eliminates matrix interference in practical application, and has high sensitivity and high specificity. The method has great potential in the aspects of high sensitivity and clinical monitoring of bacterial infection or pollution.

The invention discloses a high-stability hydroxysteroid dehydrogenase mutant, a co-immobilized enzyme construction method and application. According to the invention, a site-directed mutant library is constructed based on computer-aided design, and mutants with significantly improved thermal stability and greatly improved catalytic efficiency compared with wild type mutants are obtained through screening; meanwhile, a co-immobilized enzyme construction method based on electrostatic adsorption and chemical crosslinking is established, the hydroxysteroid dehydrogenase mutant and lactic dehydrogenase are co-immobilized, the co-immobilized enzyme can still keep high activity under high substrate concentration, and the conversion rate is still maintained to be 90% or above after 30 batches of co-immobilized enzyme are repeatedly used. And an important foundation is laid for industrial application of the hydroxysteroid dehydrogenase.

The invention relates to appearance defect visual detection equipment which comprises a conveying assembly, a supporting frame is fixedly connected to the upper surface of the conveying assembly, a detection camera is fixedly connected to the inner top wall of the supporting frame, a mounting frame is fixedly connected to the upper surface of the conveying assembly, and a shell is arranged on the inner wall of the mounting frame; a cleaning brush assembly is arranged in the shell, and a dust removal part which is close to the cleaning brush assembly and carries static electricity is arranged in the shell. According to the dust removal device, the output end of the cleaning motor drives the driving roller to rotate, then the driving belt is driven to move under cooperation of the driven roller, then the bristles are driven to move, the dust removal part is arranged, dust in the bristles close to the dust removal part is adsorbed according to the electrostatic adsorption principle, and the dust in the bristles is removed through cooperation of the driving belt; during cleaning, part of the bristles contaminated with dust are moved to the upper portion so as to be attached to the dust removal part, and therefore the visual inspection equipment for the appearance defects has the effect of being high in cleaning efficiency.

The invention discloses a nano silicon dioxide loaded ruthenium-copper bimetallic catalyst as well as preparation and application thereof, and belongs to the technical field of acetylene hydrogenation reaction catalysts. A strong electrostatic adsorption method is adopted, nano silicon dioxide is used as a carrier, the pH of a solution is higher than the isoelectric point of the carrier through adjustment of ammonia water, and the carrier is negatively charged; in ammonia water, Cu and Ru respectively form positively charged metal complexes, and metals are anchored on the surface of the carrier under the action of strong electrostatic adsorption to prepare the atomic-scale dispersed ruthenium-copper bimetallic catalyst for acetylene selective hydrogenation reaction. When the prepared catalyst is used for catalyzing an acetylene hydrogenation reaction and the reaction temperature exceeds 170 DEG C, the acetylene conversion rate can reach 100%, and the ethylene selectivity is 90%-100%. And the catalyst has excellent stability, and can keep activity for a long time without obvious deactivation phenomenon.

The invention provides a temperature control system of an electrostatic adsorption disc and an improvement method of temperature control performance. According to the system, a temperature control layer is arranged in an electrostatic adsorption disc, and the temperature control layer comprises a graphite heat absorption layer and a graphene heat conduction layer; the system further comprises a laser generator and a controller. During working, the laser generator emits heating laser to the graphite heat absorption layer, so that the graphite heat absorption layer efficiently absorbs energy to generate heat, and then the heat is quickly and uniformly conducted to the surface of the electrostatic adsorption disc through the graphene heat conduction layer with ultrahigh heat conductivity. Laser heating is used for replacing traditional resistance heating, graphene heat conduction is used for replacing traditional metal heat conduction, the method has the advantages of being high in temperature switching speed, high in control precision, good in temperature uniformity and the like, and the temperature control performance of the electrostatic adsorption disc can be remarkably improved.

According to the powder covering device for laser cladding and the operation method of the powder covering device, a mechanical arm is arranged on the rear side of a cladding machine tool, a cladding head is installed at one end of the mechanical arm, a powder outlet nozzle is arranged at the lower end of the cladding head, and a sealing cover is rotationally installed below the powder outlet nozzle; an anti-static fan is installed above one side of the cladding machine tool, a cladding base material cleaning mechanism is arranged on one side of the powder outlet nozzle, and the cladding base material cleaning mechanism comprises a driving ring motor, a fixing base, a cladding base material cleaning mechanism electric telescopic cylinder, a cleaning ring, a driven gear and a driving gear. The problems that when powder is conveyed in a pipeline, frequent friction and collision occur between the powder and the wall of the pipeline, transfer and accumulation of charges are caused, static electricity is generated, electrostatic adsorption causes accumulation of the powder on the inner wall of the pipeline, the effective conveying area of the pipeline is reduced, the conveying efficiency of the powder is reduced, and the service life of the powder is prolonged can be solved. And the thickness of the coating is not uniform.

The invention discloses a movable adsorption machine for waste gas treatment, and belongs to the technical field of waste gas treatment.The movable adsorption machine comprises an outer box body and brake wheels installed at the bottom of the outer box body, a gas inlet pipe is installed at the upper end of the outer box body, a filter plate is arranged below the gas inlet pipe, and a communicating pipe is arranged at the lower end of the filter plate; adsorption columns are inserted into the communicating pipes, the communicating pipes are arranged at the upper ends and the lower ends of the adsorption columns, the communicating pipes at the lower ends of the adsorption columns are connected with negative pressure generation equipment through drainage pipes, an exhaust pipe is installed at the upper end of the negative pressure generation equipment, and a power cam is arranged between the adsorption columns. According to the mobile adsorption machine for waste gas treatment, the filter plate can be cleaned in a manner of electrostatic dust adsorption and reverse blowing, the phenomenon that mesh holes in the filter plate are partially blocked by adopting a brush plate is prevented, meanwhile, harmful substances in waste gas can be adsorbed by arranging activated carbon particles, and the adsorption treatment effect on the waste gas is improved.

The invention provides an electrostatic adsorption device and semiconductor device processing equipment, and relates to the field of semiconductor device processing. In the electrostatic adsorption device, a pressure monitoring groove, an air exhaust hole and a pressure monitoring channel are additionally arranged on the first surface, making contact with the back face of the wafer, of the electrostatic chuck, the warping condition of the wafer can be monitored by monitoring the pressure change of the pressure monitoring channel, the adsorption voltage of the electrostatic chuck to the wafer is adjusted, and the problem of wafer warping can be solved.

The invention discloses a preparation method and application of a magnetic enrichment composite SERS (Surface Enhanced Raman Scattering) detection chip, gold nanoparticles are electrostatically adsorbed on the surface of a magnetic ferroferric oxide nanoring, the prepared material is subjected to cyclodextrin modification, nanogaps among the gold nanoparticles form hot spots, a local electromagnetic field enhancement effect is generated, and the magnetic enrichment composite SERS detection chip is obtained. The cyclodextrin molecules adsorb PAHs in the environment through a hydrophobic effect and are fixed in an electromagnetic field enhancement area, amplification of Raman signals is achieved, the magnetic material serves as a carrier, aggregation of gold nanoparticles can be effectively prevented, SERS signals can be further enhanced through a magnetic enrichment effect, and therefore, the method has the advantages that the method is simple, and the application prospect is wide. The high-sensitivity and high-selectivity detection of PAHs in the tail gas of the engineering machinery vehicle is realized by constructing the magnetic composite SERS nano sensing chip.

The invention relates to a silicon-carbon composite material based on modified MXene, a preparation method of the silicon-carbon composite material, a negative electrode and a battery. MXene is prepared by etching an MAX phase through an etching agent; the preparation method comprises the following steps: preparing graphene quantum dots B-GQD and P-GQD + respectively; the graphene quantum dots B-GQD, the graphene quantum dots P-GQD + and the MXene are self-assembled through electrostatic adsorption, and a modified MXene material B / P-GQD / MXene is formed; preparing a porous carbon material deposited with silicon nanoparticles; the modified MXene material B / P-GQD / MXene is adopted to carry out liquid phase coating on the porous carbon material deposited with the silicon nanoparticles, and the silicon-carbon composite material based on the modified MXene is formed. The conductivity of the silicon-carbon composite material can be enhanced, and the rate capability of the lithium ion battery can be improved.

The invention discloses a surface flaw detection device and process for carpet production, and relates to the technical field of surface flaw detection for carpet production. According to the surface flaw detection equipment and technology for carpet production, when carpet flaw detection is carried out, a carpet penetrates through the upper portion of an attaching roller, a second hydraulic cylinder is adjusted to drive a local jacking arc rod to jack up the local position of the carpet, the upper surface of the jacked-up carpet is in an unfolded state and expands towards the outer side, and meanwhile, the carpet passes through the attaching roller to be subjected to surface flaw detection. A driving motor is started, the driving motor drives all pressing pieces to press carpet wool at the two ends of the carpet unfolding position, and an electrostatic adsorption rod adsorbs the carpet wool at the position, so that the carpet wool at the two ends of the carpet position jacked by a local jacking arc rod gets close to the two ends; and the situation that the surface of the carpet cannot be clearly scanned by a scanning camera due to the existence of the carpet hair is avoided, so that the accuracy of a carpet surface flaw detection result is improved.

The utility model provides a kind of bag falling mechanism and dispensing system, bag falling mechanism includes: support shell;Driving portion, is installed on support shell;Bag falling portion, is installed on support shell, along vertical direction can slide, bag falling portion is transmission connection with driving portion, driving portion is used to drive bag falling portion to fall and eject the packing bag in packing bag holding mechanism.The utility model sets up bag falling mechanism including bag falling portion and driving portion, and sets up bag falling portion and driving portion transmission connection, so that driving portion can drive bag falling portion to fall and eject the packing bag in packing bag holding mechanism, can avoid packing bag to be electrostatically adsorbed on packing bag holding mechanism, and / or, packing bag is stuck by packing bag holding mechanism due to deformation, improve the operating stability of dispensing system.

The invention discloses a dust gas treatment device for woven bag production, and belongs to the technical field of dust gas treatment, the dust gas treatment device comprises a box body, a gas inlet pipe is arranged at the upper end of the box body, a gas outlet is formed in the lower end of the box body, and a fan is arranged in the gas outlet; the dust collection assembly is installed in the box body, the upper end of the dust collection assembly communicates with the air inlet pipe, and the dust collection assembly is used for adsorbing dust particles in the air when the air passes through the dust collection assembly; the dust collection box is installed in the box body, located below the dust collection assembly and used for collecting dust particles discharged by the dust collection assembly, the dust retention time is prolonged by adopting a spiral channel, the dust removal effect is remarkably improved by combining an electrostatic adsorption film, meanwhile, dust can be maintained and discharged without shutdown through vibration cleaning, and the cleaning efficiency is not affected.

The invention discloses a continuous mesh belt oil drying furnace, and belongs to the field of oil drying furnace devices, the continuous mesh belt oil drying furnace comprises an oil drying furnace main body, a mounting support frame is fixedly mounted on the inner side of the oil drying furnace main body, a conveying mesh belt is mounted on the inner side of the mounting support frame, and a collecting plate is fixedly mounted at the bottom end of the conveying mesh belt; the collecting plate is fixedly mounted on the inner side of the mounting supporting frame, one side of the mounting supporting frame is provided with a turning assembly used for heating dried objects more uniformly and an extrusion assembly used for keeping the conveying net belt tight, and the top end of the collecting plate is provided with a vibration assembly used for preventing electrostatic adsorption of chippings of the dried objects. Through the arrangement of the overturning assembly, when the conveying net belt drives the dried objects to move in the oil drying furnace body, the oil drying furnace body can be vibrated and overturned, the dried objects accumulated in the oil drying furnace body can move to the outer layer, the dried objects are evenly heated, the drying effect of the oil drying furnace body is improved, and therefore the product quality is improved.

The invention discloses a miniature bionic robot for in-situ detection of aero-engine blades, and relates to the technical field of aero-engine detection, the miniature bionic robot comprises a rigid movement mechanism, a flexible bending segment, a dual-mode adsorption system and an environment sensing system; the head and the tail of the rigid movement mechanism are connected with the driving foot, the flexible bending section is integrated with the shape memory material and the driving module, and wriggling is achieved through thermal deformation. The dual-mode adsorption system comprises an electrostatic adsorption module, a capillary adsorption module and a self-adaptive supporting structure and is used for stable adsorption; the environment sensing system is provided with an antenna sensor, a micro camera, a photoelectric sensor and a sliding displacement sensor and used for sensing the surrounding environment. According to the robot, disassembly-free in-situ detection of the aero-engine blade is achieved, the detection efficiency and precision are improved, the detection cost is remarkably reduced, the comprehensive performance index is 2-5 times higher than the industrial standard, and the robot has wide application prospects and important engineering value.

The invention provides a flotation separation method for complex and difficult-to-separate high-sulfur copper ore, and belongs to the field of mineral flotation, lime is adopted to adjust ore pulp to a low-alkali environment, and efficient recovery of valuable elements of copper, silver and sulfur is achieved under the combined action of an inhibitor and a synergist. A low-alkali copper separation process is adopted, copper-sulfur intergrowth and silver-containing minerals are prevented from being strongly inhibited in a high-alkali ore pulp environment, regrinding is introduced before copper concentration operation to promote dissociation of the copper-sulfur intergrowth, and the grade of copper concentrate is improved. During copper roughing, gangue minerals and pyrite are inhibited by adopting an inhibitor to prevent the gangue minerals and the pyrite from forming a cover on the surface of metal minerals, and selective inhibition on the pyrite is generated in the forms of strong oxidation, electrostatic adsorption, hydroxylated metal point adsorption and the like on the surface of the pyrite; the synergist is adopted to change the surface charge of gangue minerals, the argillaceous gangue is prevented from forming a mucus coating on the surface of the chalcopyrite by means of electrostatic repulsion, meanwhile, the flotation froth performance is enhanced, floating of the chalcopyrite is accelerated, and the copper separation effect is optimized.

The invention provides an organic molecule cytoplasm delivery carrier as well as a preparation method and application thereof, the compound for cytoplasm delivery has the characteristic of fat-soluble aggregation, and can form electrostatic adsorption with small molecule protein goods such as RNase A (13.7 KDa), Trypsin (24KDa) and Saporin (32.8 KDa), medium molecule protein goods such as HRP (40KDa) and macromolecular protein goods such as beta-Gal (430KDa), so that the compound for cytoplasm delivery can be used for preparing a lipid-soluble protein carrier. And furthermore, transmembrane transportation is formed through the strong fat solubility property, so that the protection and intracellular delivery of carried protein molecules are realized. According to the delivery mechanism, cargo molecules can quickly penetrate through cell membranes, and carried protein molecules can enter cytoplasm to exert functions without release operation. Development of the organic molecule cytoplasm delivery carrier is expected to assist potential protein therapies with low bioavailability and off-target toxicity to complete clinical transformation, which is crucial to tumor therapy, gene therapy and the like requiring precise local administration.

The invention provides an energy-saving central air conditioner, which belongs to the technical field of central air conditioners, and comprises an air conditioner body and a pipeline arranged at the lower end of the air conditioner body, and further comprises an air inlet adjusting assembly, an induction dust collecting assembly and a cleaning and collecting assembly, air is purified through electrostatic adsorption of the adsorption plate, dust accumulation and local blockage conditions are accurately detected through cooperation of an elastic part, a magnetic coating and a Hall sensor, the air inlet quality of the air conditioner and system operation are prevented from being affected by feedback signals, tiny impurities can be effectively captured by the adsorption plate, and the air cleanliness is improved; a wind power and knocking combined mode is adopted for dust removal, a filter screen plate and an adsorption plate are cleaned in all directions, and inlet air cleanliness is guaranteed; when the ash discharging port is not used for removing ash, the magnetic blocking plate blocks the ash discharging port to prevent leakage, and the pressing rod limits the position of the connecting plate to ensure the monitoring precision of the sensing rod, reduce part shaking, prevent dust from falling off in advance and ensure the adsorption effect; the baffle is connected with related parts to control the opening degree of the pipeline, dust is prevented from entering the wall during dust removal, and dust collection is guided.

The invention provides a roasting workshop environment-friendly solid waste pollution dust collection device and method, and relates to the technical field of solid waste pollution dust collection, the roasting workshop environment-friendly solid waste pollution dust collection device comprises a shell, the shell is internally provided with a collection mechanism, the collection mechanism comprises an outer cylinder, the outer cylinder is fixedly connected with the shell, the inner surface of the outer cylinder is fixedly connected with a protection shell, and the protection shell is fixedly connected with the shell. The lower surface of the outer cylinder is fixedly connected with an inner cylinder, the lower surface of the outer cylinder is rotatably connected with a rotating cylinder through a bearing, and the surface of the rotating cylinder is fixedly connected with a filter screen. And the electrostatic adsorption is responsible for capturing residual small particles and ensuring that exhausted gas is cleaner, and for solid waste pollution dust collection, the concentration of inhalable particles in a workshop can be greatly reduced through efficient filtration, and more comprehensive protection is provided for the indoor environment.

The invention discloses a nucleic acid tetrahedron DNA-quercetin compound and application of the nucleic acid tetrahedron DNA-quercetin compound in treatment of retinal neovascular diseases. In the nucleic acid tetrahedron DNA-quercetin compound disclosed by the invention, a quercetin molecule is connected to one single-stranded DNA of four single-stranded DNAs of a nucleic acid tetrahedron through an azide coupling reaction. The compound is stable in physical property, quantitatively carried quercetin molecules guarantee the stability of the treatment effect of the compound, generation of new vessels can be effectively prevented, remodeling of retina non-perfusion area vessels can be promoted, retina vascular injury can be recovered, a new strategy is provided for treatment and prevention of retina neovascular diseases, and the compound is worthy of popularization and application. Meanwhile, compared with tFNAs-QUE obtained through an existing electrostatic adsorption method, the tFNAs-QUE synthesized through the azide coupling method has a better treatment effect, pathological neovascularization is greatly reduced, and meanwhile generation of physiological blood vessels in a non-vascular region is obviously promoted.

The invention provides a hybrid-driven MEMS device and a preparation method thereof, and the method comprises the steps: forming a first actuating structure in a first substrate, forming a piezoelectric composite film layer on the first actuating structure, applying voltages with opposite electrical properties to a first electrode layer and a second electrode layer, enabling a piezoelectric layer to deform under the effect of an inverse piezoelectric effect, and enabling the piezoelectric composite film layer to form a piezoelectric composite film layer; the movable end of the first actuating structure is driven to move; a second cavity is formed in the second substrate, a third electrode layer is formed in the second cavity, voltage which is the same as or opposite to that of the second electrode layer is applied to the third electrode layer, and the third electrode layer and the second electrode layer serve as electrodes for electrostatic driving. According to the MEMS device, the first actuating structure and the second actuating structure are arranged, so that the deformation deflection of the movable end of the first actuating structure is further increased on the basis of displacement generated by piezoelectric driving, the hybrid-driven MEMS device is formed, the defects of independent driving of piezoelectric driving and electrostatic driving are overcome, and the MEMS device can achieve larger displacement under the same voltage during accurate deflection.

The utility model discloses a controllable flexible pressing device applied to microneedle patch skin surface drug delivery, and belongs to the technical field of drug delivery, the controllable flexible pressing device comprises a microneedle patch, an electrostatic adsorption membrane, a rigid support body, an air bag and a thin film pressure sensor, the microneedle patch is attached to the skin surface, and a needle head is downward; the electrostatic adsorption membrane is arranged above the microneedle patch; the rigid support body is arranged on the electrostatic adsorption membrane, and an air bag mounting cavity is formed in the middle of the rigid support body; the air bag is arranged in the air bag mounting cavity; and the thin film pressure sensor covers the air bag. The device is simple in structure and convenient to operate, the application direction, the change rate, the magnitude and the action time of force in the dosing process can be controlled, the penetration depth of the microneedle is influenced, and then the positive influence on the experimental result and the clinical effect is generated.

Provided is a plasma processing apparatus capable of obtaining desired etch profiles and preventing the degradation of yield rates due to the adhesion of particles, and equipped with a processing chamber in which a sample is plasma-treated; a radio-frequency power source for supplying radio-frequency power used to generate plasma; a sample stage which is provided with electrodes for electrostatically adsorbing the sample and on which the sample is mounted; and a DC power supply for applying DC voltages to the electrodes, the apparatus being further equipped with a control apparatus for controlling the DC power supply so as to apply such DC voltages as to decrease the absolute value of the potential of the sample in the absence of the plasma.