2399 results about "Electrostatic adsorption" patented technology

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 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.

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 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 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 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 invention provides an electrostatic chuck structure for semiconductor processing, which comprises a base, an adsorption electrode layer and a ceramic dielectric layer, and is characterized in that the adsorption electrode layer is arranged between the base and the ceramic dielectric layer; the check ring is fixedly mounted on the top edge of the ceramic dielectric layer; the air chamber is arranged in the ceramic dielectric layer, a plurality of air outlet holes are formed in the top of the air chamber in a communicating mode, the air outlet holes are evenly distributed in the top face of the ceramic dielectric layer, the air outlet holes are each connected with a boss in a matched mode, the bosses extend to the position above the ceramic dielectric layer, and the bosses are used for bearing a wafer; and the lifting mechanism is connected with the boss. Through the air chamber and the plurality of uniformly distributed air outlet holes arranged on the ceramic dielectric layer, after the wafer is subjected to electrostatic adsorption, air for heat dissipation and cooling is introduced into the air chamber through the air inlet pipe, the air is shunted to the plurality of air outlet holes from the air chamber, and blowing is directly provided for the bottom surface of the wafer through the air outlet holes, so that the heat dissipation effect is guaranteed.

The invention provides a calcium humic acid modified biochar composite material as well as a preparation method and application thereof. The preparation method specifically comprises the following steps: preparing calcium modified biochar powder from biochar powder and a calcium source; mixing humic acid with the calcium modified charcoal powder, filtering and drying to obtain a calcium humic acid modified charcoal composite material; wherein the mass ratio of the humic acid to the calcium modified charcoal powder is 1: (2-20). When the calcium humic acid modified biochar composite material is used as a soil remediation agent for soil remediation, the pH value, the organic matter content and the cation exchange capacity of soil can be improved, the soil hardening degree is relieved, heavy metal lead and cadmium and ions thereof can be immobilized in the modes of ion exchange, electrostatic adsorption, surface complexing, deposition and the like, and the soil remediation efficiency is improved. The soil heavy metal content is further reduced.

This invention relates to a method for preparing a p-aminobenzenesulfonic acid blended nanofiltration membrane and its application. The invention aims to address the technical problem that existing polymer thin films struggle to simultaneously increase permeate flux while improving retention rate. This invention provides a nanofiltration membrane with high efficiency in separating cobalt and lithium ions and significantly enhanced permeate flux. It achieves this by doping p-aminobenzenesulfonic acid during the preparation of traditional TFC nanofiltration membranes, efficiently introducing sulfonic acid groups to promote the formation of an ordered nanochannel structure in the polyamide network, thereby increasing water flux. Simultaneously, the negative charge carried by the sulfonic acid groups enhances the overall electronegativity of the membrane, making it more effective against Co ions. 2+ The electrostatic adsorption capacity is significantly higher than that of Li + This enables efficient separation of cobalt and lithium ions. The nanofiltration membrane material provided by this invention can be widely used in the resource-based treatment of acid leaching wastewater from lithium cobalt oxide batteries, achieving efficient separation and recovery of cobalt and lithium, and improving economic benefits and resource utilization.

The invention provides a ceramic heating plate and a processing method of the ceramic heating plate. The machining method of the ceramic heating plate comprises the steps that the ceramic heating plate formed through normal-temperature isostatic pressing is prepared, the upper surface of the ceramic heating plate is made of aluminum nitride, at least an electrostatic adsorption metal wire mesh electrode is embedded in the ceramic heating plate, the process temperature of normal-temperature isostatic pressing forming is lower than 25 DEG C, and the process air pressure of normal-temperature isostatic pressing forming is lower than 200 Mpa; the process temperature of the high-temperature and high-pressure sintering is higher than 1500 DEG C, the process air pressure of the high-temperature and high-pressure sintering is higher than 100 Mpa, and the high-temperature and high-pressure sintering is used for avoiding the use of a binder or a ceramic layer spraying process, so that the heating temperature is increased, the sparking phenomenon of an equipment corrosive agent under high electrostatic adsorption voltage is avoided, and the service life of the equipment corrosive agent is prolonged. The service life of equipment is prolonged; and the safety performance of the process is improved.

The invention discloses a protruding conductive microsphere and a pretreatment method thereof. The pretreatment method specifically comprises the steps of roughening treatment, protruding and interface activity treatment, sensitization treatment, activating treatment and chemical plating. In the protruding and interfacial activity treatment, by adding an interfacial agent, the electronegativity of the surfaces of the microspheres is enhanced, electrostatic adsorption with positively charged nickel nanoparticles is generated, and meanwhile, agglomeration of the nickel nanoparticles on the surfaces of the polymer microspheres is effectively prevented through the steric hindrance effect; therefore, a nickel nanoparticle bulge structure which is high in density, uniform in distribution and firm in combination is formed on the surface of the polymer microsphere. The method effectively solves the problems that a traditional conductive microsphere coating is prone to cracking and falling off, poor in dispersity and the like, the prepared protruding conductive microspheres have the outstanding advantages of being high in coating binding force, excellent in conductivity, good in dispersity, not prone to agglomeration and the like, the technological process is simple, mass production is easily expanded, and the method is suitable for large-scale production. The anisotropic conductive adhesive film has a wide commercial application prospect in the field of electronic packaging such as anisotropic conductive adhesive films.

The invention discloses a high-activity injectable self-healing temperature-sensitive hydrogel dressing and a preparation method and application thereof, the high-activity injectable self-healing temperature-sensitive hydrogel dressing is obtained by forming a temperature-sensitive hydrogel through a two-dimensional nano material MXene aqueous solution and F127 under the hydrogen-bond interaction, combining an M2 macrophage source exosome on MXene under the electrostatic adsorption action, and wrapping the MXene through a network structure of the hydrogel. The preparation method is simple, an obtained sample is free of organic solution residues, reaction conditions are mild, operation is convenient, the raw material cost is low, the hydrogel dressing has temperature-sensitive, injectable and self-healing performance, the hydrogel dressing has temperature-sensitive and injectable performance, is sol at normal temperature, forms gel after making contact with skin and is convenient to smear and use on wounds, and experimental results prove that the hydrogel dressing has good application prospects. The hydrogel has good biocompatibility and relatively strong antibacterial performance, and can effectively play anti-inflammatory and vascular regeneration promoting roles in diabetic wounds and promote rapid repair of the diabetic wounds.

The invention belongs to the technical field of water purification materials, and particularly relates to a multifunctional water purification gel material and a preparation method thereof. The composite material consists of an outer-layer film, a middle-layer framework and an inner-layer carbon core, the outer-layer film is prepared from the following raw materials: sodium alginate, carboxymethyl starch, NaCl and Tween-20; the middle-layer framework is prepared from the following raw materials: chitosan, modified sodium bentonite and Fe-P nano powder; the inner-layer carbon core is prepared from the following raw materials: rice hull biochar, nano CaCO3, FeCl3. 6H2O and FeSO4. 7H2O. Efficient water purification is achieved through a three-layer synergistic structure, and the outer layer Ca < 2 + > cross-linked sodium alginate / carboxymethyl starch porous membrane intercepts particles and buffers metal ions; the middle layer is integrated with chitosan to chelate heavy metals, CTAB-bentonite electrostatically adsorbs anions and Fe-P nanoparticles to precipitate phosphate / arsenate; and the biochar-Fe3O4 complex on the inner layer provides deep adsorption and catalytic oxidation functions.

The invention discloses a hydrophobic porous adsorption material for removing perfluorooctanoic acid in water and application of the hydrophobic porous adsorption material. The hydrophobic porous adsorption material is prepared by carrying out free radical polymerization reaction on an imidazolyl ionic liquid monomer and divinyl benzene. The hydrophobic porous adsorbent combines the advantages of good pore channel diffusion, electrostatic adsorption, hydrophobic interaction and the like, and shows excellent adsorption performance and extremely high adsorption rate under different initial concentrations of perfluorooctanoic acid. The adsorption material provided by the invention is simple in preparation method and low in cost, the adsorption performance of the adsorption material on the perfluorooctanoic acid is remarkably improved through the synergistic effect of multiple mechanisms, and the adsorption material is an effective scheme for efficiently removing the perfluorooctanoic acid.

The invention belongs to the technical field of miniature wall-climbing robots, and particularly relates to a miniature double-foot wall-climbing robot based on electrostatic adsorption, which comprises a bracket, two groups of symmetrically arranged driving devices, two actuating legs and two groups of electrostatic chucks, the driving devices are respectively arranged on two sides of the bracket, the output ends of the driving devices are connected with the actuating legs, and the electrostatic chucks are arranged at the lower ends of the actuating legs. The two sets of driving devices drive the actuating legs to drive the electrostatic chucks to alternately swing through alternate actuation, and the two feet alternately execute adsorption, swing and desorption actions in cooperation with alternate adsorption and desorption of the electrostatic chucks, so that the robot continuously and stably crawl on the wall face. A bionic gait mode is formed through alternate adsorption, desorption and swinging of the left and right feet, continuous adsorption of the suction cups on at least one side at any moment is ensured, instability caused by simultaneous desorption of the two feet is avoided, stable adsorption and continuous and efficient crawling on multiple types of wall surfaces are achieved, the structure is compact, and operation is convenient. The adaptability and the stability of the robot in a narrow space and a complex wall surface environment are improved.

The invention discloses an unpowered air purification device based on electrostatic adsorption and negative ion effects, and relates to the technical field of air purification, the unpowered air purification device comprises a ventilation pipeline, an electrostatic adsorption module, a particle capture net, a negative ion release module and the like, a wind scooper guides airflow to enter the electrostatic adsorption module, and a friction ball rubs with an electrode plate to enable the electrode plate to be electrified; particulate matters in the air are adsorbed, falling particulate matters are collected by a liquid collecting box, residual particulate matters are further intercepted by a particulate capturing net, the elastic design is convenient for shaking off and cleaning, and the negative ion release module accelerates the generation of negative ions and purifies the air by utilizing the solar thermal conversion and piezoelectric effect. Efficient air purification is achieved through a multi-stage purification structure, the functions of humidity adjustment, intelligent reminding and the like are achieved, the structure is simple, energy conservation and environment protection are achieved, the device can adapt to various scenes, and an innovative scheme is provided for solving the air pollution problem.

According to the high-temperature-resistant nitrogen-fixing bacteria microcapsule fertilizer and the preparation method thereof, aiming at the problems of thallus inactivation and nutrient loss in a high-temperature environment, a sodium alginate-chitosan double-layer embedding technology is combined with magnetic nanoparticle modification, and a stable double-layer structure is formed by optimizing the ratio of an embedding material, so that the high-temperature-resistant nitrogen-fixing bacteria microcapsule fertilizer is prepared. The survival rate and activity of the nitrogen-fixing bacteria at high temperature are remarkably improved, and meanwhile, the functions of intelligent nutrient release and magnetic recovery are achieved. The fertilizer is prepared from composite microcapsules, amino acid, humic acid and other raw materials according to a specific ratio through magnetic field orientation treatment, multi-stage mixing, atomization granulation and magnetic field screening processes, the particle size is controlled to be 0.5-3.35 mm, and the shelf life is prolonged to 12 months. The method has the technical effects that trehalose-glycerol / sorbitol synergistically forms a glassy protective film to maintain the stability of thalli, gamma-aminobutyric acid activates nitrogenase gene expression, magnetic nanoparticles construct a photosynthetic symbiotic system to optimize rhizosphere oxygen supply, and silanized FeO nanoparticles fix heavy metal ions through electrostatic adsorption, so that the heavy metal ions in the thalli are effectively adsorbed, and the heavy metal ions in the thalli are effectively adsorbed. And the humic acid buffers the pH fluctuation of the soil, so that the nitrogen fixation efficiency is finally improved by 30-50%, and the crop yield is increased by 15-25%.