62 results about "Negative charge" patented technology

A drift elimination system for evaporative heat rejection equipment. The drift elimination system includes a first and second set of electrodes positioned apart from one-another in the air flow downstream of the fill and spray system. The first set of electrodes, optionally in the form of needles or thin plates are energized with a positive or negative charge. The second set of electrodes, optionally in the form of wavy plates or a wire mesh are energized with the opposite charge. Water droplets passing over or through the first set of electrodes accept a charge from the first set of electrodes and are attracted to the second set of electrodes where they are collected, removing the charged droplets from the airflow, reducing water loss and abating plume formation.

The application relates to a coating carrier plate and a coating device. The coating carrier plate comprises a carrier plate body and a conductive structure. The conductive structure comprises a first conductor and a second conductor. The first conductor is protruded on the carrier plate body along a first direction. The second conductor is electrically connected to the first conductor and extends along at least one direction intersecting the first direction. The first conductor is protruded on the carrier plate body along the first direction. Due to the tip effect, the electric charges accumulated on the carrier plate preferentially gather to the tip of the protruded first conductor. The electric field intensity of the tip part is higher, and the electric charges distributed everywhere can be more efficiently captured, the state of the disordered gathering of the electric charges is changed, the random accumulation of the electric charges on the carrier plate is avoided, and the risk of abnormal discharge is reduced. After the electric charges gather to the tip of the first conductor, the second conductor can provide a discharge path for the gathered electric charges due to the good conductivity of the second conductor, so that the accumulated negative electric charges can be drained along the second conductor, and the abnormal discharge caused by the more and more accumulated electric charges is prevented.

This invention discloses a TOPCon cell structure and its fabrication method, belonging to the field of photovoltaic technology. The TOPCon cell structure includes a boron-doped emitter, a first-phase Al2O3 amorphous layer, a second-phase γ-Al2O3 metastable layer, and a gradient composite film layer sequentially disposed on the surface of an N-type silicon substrate. In the TOPCon cell obtained by this invention, the first-phase Al2O3 amorphous state exhibits long-range disorder, non-periodic atomic arrangement, and contains numerous dangling bonds and structural defects. The second-phase γ-Al2O3 metastable state possesses high specific surface area and good thermal stability, enabling the synergistic formation of a high-density fixed negative charge. These charges effectively repel minority carriers, reducing surface recombination. The long-range disordered Al2O3 amorphous state and the partially ordered γ-Al2O3 form a metastable combination, which facilitates the formation of numerous dangling bonds at the alumina-silicon interface. These dangling bonds, with the assistance of hydrogen, effectively fix the negative charge, thereby achieving an extremely low surface recombination rate and exhibiting excellent passivation effects.

This invention belongs to the field of microbial electrochemistry and single-cell analysis technology, and specifically relates to a femtocoulomb-level single-bacterial surface charge imaging method and its application. This technology is based on electrochemiluminescence microscopy, utilizing the spontaneous enrichment of cationic ECL luminescent molecules by the electrostatic field of the negative charge on the bacterial surface, thereby non-destructively enhancing its ECL signal. By establishing a quantitative relationship between the ECL intensity enhancement ratio and the number of adsorbed molecules, and combining this with COMSOL simulation to determine the thickness of the luminescent layer, it achieves for the first time high-throughput, high spatiotemporal resolution dynamic quantitative measurement of femtocoulomb-level charges on the surface of a single living bacterium. The invented technology has high sensitivity, high resolution, and good biocompatibility, and can be used to reveal bacterial metabolic-charge regulation mechanisms, analyze synergistic electron transport pathways, and screen highly electroactive bacterial subpopulations in situ, providing a key tool for microbial electrochemical research.

Disclosed are an anode structure for a lithium secondary battery and a method for manufacturing the same, the anode structure including: a first active material layer of a carbon-based material powder including a first coating film having a negative charge on the surface in an electrolyte; and a second active material layer of a carbon-based material powder laminated on the first active material layer and including a second coating film having a positive charge on the surface in an electrolyte.

This invention discloses an electrophoretic electronic paper, comprising an electrode plate, a capsule, and charged particles. There is only one electrode plate, and the capsule is disposed on one side of the electrode plate. Multiple charged particles are encapsulated within the capsule. Each charged particle includes a positively charged particle and a negatively charged particle that can combine to form a whole. Each of the positively and negatively charged particles is half of the whole, and the positively and negatively charged particles are of different colors. By applying a positive voltage to the electrode plate, the half of the particle with the negative charge will rotate towards the electrode plate, while the half with the positive charge will rotate away from the electrode plate, displaying the color of the negatively charged particle, and vice versa. Furthermore, since the positively and negatively charged particles are encapsulated as a whole, only one type of charged particle is encapsulated within the capsule, allowing for a single encapsulation per capsule. By adjusting the structure of the charged particles, the number of encapsulation steps and electrode plates is reduced, simplifying the manufacturing process and wiring.

This invention discloses a method for preparing a seawater-resistant, chlorine-doped carbon-based electrode material with five-membered ring defects. The method includes step one: mixing the chlorine-doped system; step two: pyrolysis activation treatment; step three: cooling and washing; and step four: rewashing and drying. This invention utilizes the synergistic construction of chlorine doping and five-membered ring defects. The localized negative charge induced by chlorine doping enhances its resistance to chloride ions in seawater, significantly improving the material's stability and service life in a seawater environment. The five-membered ring defects significantly improve the electronic structure and catalytic activity of the carbon material, thereby enhancing its electrocatalytic performance and improving the overall electrochemical performance of the carbon-based electrode material. The introduction of chlorine doping during the preparation process also serves as a template to promote the construction of porous nanosheet structures in the carbon material. The method is simple to operate, low in cost, and suitable for large-scale production. It balances structural innovation, superior performance, and process feasibility, possessing broad industrial prospects and technological promotion value.

The present disclosure is directed to at least one embodiment of a filter that is configured to remove contaminants utilizing a first conductive mesh (e.g., first electrode) and a second conductive mesh (e.g., second electrode) that extends around the first conductive mesh. For example, the first conductive mesh may receive a first electrical signal and the second conductive mesh may receive a second electrical signal such that the first and second conductive meshes are oppositely charged from each other (e.g., the first conductive mesh is positively charged and the second conductive mesh is negatively charged). Anions that are present within the fluid or generated by an electrical field between the first and second conductive meshes may interact with the contaminants such that the contaminants are attracted to at least one of the first and second conductive meshes, respectively.

To solve the problem that the existing binder cannot stably constrain the volume expansion of the negative active material, the application provides a negative electrode binder, a negative electrode sheet and a secondary battery. The negative electrode binder comprises a polymer and a hydrogen bond acceptor containing a quaternary ammonium salt, the polymer comprises an acrylic structural unit, a zwitterionic structural unit and a crosslinking structural unit, and the zwitterionic structural unit comprises a cationic group with a positive charge and an anionic group with a negative charge. In the application, the positive and negative charge groups of the zwitterionic structural unit form a double anchoring mechanism, the cationic group anchors the anion of the hydrogen bond acceptor through electrostatic interaction, and the anionic group produces ion-dipole interaction with the quaternary ammonium cation of the hydrogen bond acceptor, so as to firmly lock the hydrogen bond acceptor in the polymer network. The anchored hydrogen bond acceptor can reconfigure the original rigid hydrogen bond network of the polymer, form a dynamic hydrogen bond network, significantly improve the flexibility and stress buffering capacity of the binder, and inhibit the volume expansion of the negative active material.

An enriched air delivery device comprises an upper casing (10); a lower casing (20) provided with ventilation grids (21); a chamber (30) located between both casings (10, 20), which houses air inside it; at least one atmospheric cold plasma generator (40) housed between both casings (10, 20), and configured to emit negatively charged ions onto the air in the chamber (30), thus creating enriched air; and an external device (50) connected by wiring to the at least one atmospheric cold plasma generator (40), for its electrical supply; such that in an operating state of the device (1), and applied to the skin of a user, the enriched air existing in the chamber (30) is released to the outside through the ventilation grids (21) of the lower casing (20), such that said enriched air is naturally absorbable by the user's own skin.

The application belongs to the technical field of lithium ion battery electrode materials, and discloses a method for in-situ coating of magnesium borate on a lithium ion battery positive electrode material. By adjusting the feeding ratio of a magnesium source and a boron source, and by using the positive charge layer on the surface of the lithium ion battery positive electrode material, the borohydride groups with negative charges dispersed in the solution, and the magnesium ion groups with positive charges, a positive-negative-positive charge distribution layer is constructed. Then, through a hydrolysis reaction, a uniform and complete amorphous magnesium borate coating is in-situ coated on the surface of the positive electrode material, a series of in-situ coating of magnesium borate (Mg2B2O5, Mg3B2O6, MgB4O7) is realized, and a lithium ion battery positive electrode material with good interface stability in air and electrolyte is prepared. The method provided by the application has remarkable effects, simple and efficient steps, low cost, and is easy to realize industrialized preparation.

The invention claimed herein relates to a dielectric polishing composition and a method thereof. The invention claimed herein particularly relates to a composition comprising: (A) surface-modified colloidal silica particles comprising negatively charged groups on the surface of the particles, wherein the surface-modified colloidal silica particles have a negative charge, a particle size of 60 nm to 200 nm, and a zeta potential of < -35 mV at a pH in the range of > 2.0 to < 6.0; (B) at least one corrosion inhibitor selected from at least one guanidine derivative; (C) at least one iron (III) oxidizing agent; (D) at least one buffering agent selected from at least one basic amino acid having an isoelectric point (pi) of > 6.5; (E) at least one stabilizer; and (F) an aqueous medium, wherein the pH of the composition is in the range of > 2.0 to < 4.3, and wherein the composition has a polyacrylamide content of < 1 ppm.

The application provides a preparation method of a nanofiltration membrane, and belongs to the technical field of membrane separation. The method comprises the following steps: immersing a polyimide membrane into a crosslinking solution to obtain a support layer; immersing the support layer into a mixed solution of 1,3,5-tris(tris(2-hydroxyethyl)ammonium methyl)benzene and an amino alcohol, and then air-drying to obtain an intermediate; pouring a polyacyl chloride solution onto the surface of the intermediate, and then drying to obtain the nanofiltration membrane. The 1,3,5-tris(tris(2-hydroxyethyl)ammonium methyl)benzene and the small-molecule amino alcohol with strong hydrophilicity are mixed, and then subjected to an interfacial reaction with the polyacyl chloride solution to construct a separation layer of the nanofiltration membrane. The nanofiltration membrane has a regular pore structure, can realize size screening on dye molecules, and the negative charge on the surface of the nanofiltration membrane can produce electrostatic repulsion on anionic dyes, so that the rejection performance of the nanofiltration membrane on the anionic dyes is improved and the flux is maintained.

This invention relates to a method for preparing modified cellulose fiber nonwoven materials for ice crystal films. A porous membrane, consisting of a cellulose fiber spunlace nonwoven fabric with a three-dimensional texture, is tightly sandwiched between a soluble metal anode and an inert cathode to construct an electrolytic cell. The electrolytic cell is immersed in an electrophoretic modification solution containing negatively charged biocompatible macromolecules. A DC voltage is applied between the two electrodes, driving the macromolecules to actively penetrate into the spunlace nonwoven fabric via an electric field. An electrochemical oxidation reaction causes the soluble metal anode to release crosslinking ions in situ. These crosslinking ions then react with the migrated macromolecules in situ, forming a gel network within the fiber network. Finally, the product is obtained after rinsing and drying. This invention makes the preparation process more efficient, achieving deep and uniform penetration and efficient in-situ fixation of the modifier in the fiber substrate. It also protects and even strengthens the original physical texture during the modification process, resulting in high-performance gel mask materials.

The application relates to the technical field of medical devices, and provides a coagulation plug structure and a matching device with the same. The coagulation plug structure comprises a conveying piece, an attached plug piece, a first conductive piece and a second conductive piece. The attached plug piece has a folding state of being folded in a conveying cavity and a release state of being released from the conveying cavity after being subjected to external force. The distal end of the first conductive piece is connected with the proximal end of the attached plug piece. After the first conductive piece, the attached plug piece and the second conductive piece are connected with positive and negative ions in blood and a power supply, a current loop is formed, the coagulation plug structure forms a closed loop, a negative electrode is not needed to be punctured through the human body, the attached plug piece is positively charged after being electrified, a positive electric field is generated, blood electrophoresis with negative charges is attracted, and a blood clot is rapidly formed around the attached plug piece, so that the treatment time is shortened.

This application discloses a solid-state battery and an electrical device, relating to the field of battery technology. The application provides a solid-state battery including a positive electrode, a negative electrode, and a solid electrolyte membrane. The positive electrode includes a positive current collector, a positive active material layer disposed on at least one surface of the positive current collector, and an adhesive layer disposed on the side of the positive active material layer away from the positive current collector. The negative electrode includes a negative current collector, a negative active material layer disposed on at least one surface of the negative current collector, and an adhesive layer disposed on the side of the negative active material layer away from the negative current collector. The adhesive layer includes a two-dimensional material modified with negatively charged groups, a framework material, a solid electrolyte, and a thermoplastic / thermosetting adhesive. The adhesive layer of this application, with its specific structure and material, is disposed on the side of the positive and negative active material layers away from the current collector, which improves both interfacial adhesion and rate performance and cycle life.

This application discloses a method for recovering mica-associated tantalum-niobium ore. The method includes the following steps: S1, adjusting the pretreated mica-associated tantalum-niobium ore with a dispersant to obtain an adjusted slurry; S2, subjecting the adjusted slurry to gravity separation to obtain a gravity concentrate; S3, subjecting the gravity concentrate to gradient magnetic separation to obtain a tantalum-niobium concentrate. The dispersant includes at least one of water glass, acidified water glass, and sodium hexametaphosphate. By adding a dispersant to the pretreated mica-associated tantalum-niobium ore, the dispersant hydrolyzes to generate negatively charged ions, enhancing the negative charge of the fine mica particles. This effectively breaks down the agglomeration structure of the fine mud flocs through electrostatic repulsion and steric hindrance, releasing the encapsulated fine tantalum-niobium minerals. Simultaneously, it improves the dispersion stability of the adjusted slurry, providing favorable conditions for subsequent gravity separation and gradient magnetic separation. Results show that the recovery rate of Ta₂O₅ is greater than 53%, and the recovery rate of Nb₂O₅ is greater than 51%.

Systems and methods for controlled thermonuclear fusion are provided. An example method includes providing a reactor, disposing an anode and a cathode within the reactor, where the anode and the cathode form an interelectrode space, providing, by a capacitor, a positive charge to the anode and a negative charge to the cathode to obtain a predetermined potential difference between the anode and the cathode, charging, by a high-voltage power source, the capacitor to a predetermined capacitance, and introducing a predetermined amount of a liquid including a light element and an electrolyte into the interelectrode space to cause, by the predetermined potential difference, an electric discharge through the liquid, thereby inducing a thermonuclear reaction involving the light element.

This utility model relates to the field of charging and discharging technology, specifically, to a charging and discharging device. It includes a housing assembly comprising an outer shell and a receiving cavity; the outer shell encloses the receiving cavity; a charging assembly including a positive charging connector and a negative charging connector connected to the outer shell, and a first switch module, a second switch module, a first conductor, and a second conductor disposed within the receiving cavity; a discharging assembly including a positive discharging connector and a negative discharging connector connected to the outer shell; and a third switch module, a fourth switch module, a third conductor, and a fourth conductor disposed within the receiving cavity; and a first controller disposed within the receiving cavity and connected to the outer shell; the first controller is electrically connected to the first switch module, the second switch module, the third switch module, and the fourth switch module, respectively. This solves the problem that existing charging or discharging devices, when used alone, would result in excessive size.

Provided is an ink composition that is excellent in bleed prevention and wiping resistance and is suitable for industrial production. The present invention relates to a composite coloring particle including a resin particle having a positive charge on the surface of the particle and a pigment particle having a negative charge on the surface of the particle, the aforementioned resin particle and the aforementioned pigment particle being complexed by electrostatic interaction, and an aqueous ink composition in which the aforementioned composite coloring particle is dispersed in an aqueous medium, and a writing instrument equipped with the aforementioned aqueous ink composition. Furthermore, the present invention relates to a method for producing a composite coloring particle, including a complexing step of mixing a resin emulsion including a resin particle having a positive charge on the surface of the particle and a pigment dispersion including a pigment particle having a negative charge on the surface of the particle.

A tin-based solder alloy powder in the form of 2 µm to 38 µm spherically shaped tin-based solder alloy particles having an inorganic surface and a thin outer surface layer of stress castor oil, wherein the inorganic surface plus the thin outer surface layer of stress castor oil together form a surface area of the spherically shaped tin-based solder alloy particles, and wherein the surface area, when subjected to ToF-SIMS analysis with Ga+ primary ions having an energy of 15 keV and a total scan time of 5 minutes, shows a secondary ion mass spectrum comprising the following negatively charged secondary ion fragments: 113 amu with a relative signal intensity in the range of 0.7 to 3.1, 127 amu with a relative signal intensity in the range of 0.9 to 4.4, 136 amu with a relative signal intensity in the range of 1.4 to 6.7, 137 amu with a relative signal intensity in the range of 0.6 to 3.9, 152 amu with a relative signal intensity in the range of 1.3 to 12, 153 amu with a relative signal intensity in the range of 2.3 to 20, 183 amu with a relative signal intensity in the range of 0.6 to 16, 279 amu with a relative signal intensity in the range of 0.5 to 12, and 297 amu with a signal intensity of 1.

This application relates to the field of semiconductor technology. Embodiments of this application provide a surge negative charge driving circuit and a switching power converter for suppressing crosstalk, comprising: a driving module and a surge negative charge module; a first terminal of the driving module receives an input signal, and a second terminal of the driving module is connected to the gate node of a silicon carbide MOSFET, used to control the turn-on and turn-off of the silicon carbide MOSFET according to the input signal; a first terminal of the surge negative charge module receives the input signal, a second terminal of the surge negative charge module is connected to a power supply terminal, a third terminal of the surge negative charge module is connected to a ground terminal, and a fourth terminal of the surge negative charge module is connected to the gate node of the silicon carbide MOSFET, used to release negative charge to the gate node during the turn-off process of the silicon carbide MOSFET when the drain voltage of the silicon carbide MOSFET rises, causing Miller current to flow back to the gate node, in order to neutralize the Miller current. Highly efficient crosstalk suppression is achieved through the physical method of charge neutralization, without relying on a continuous negative voltage power supply, simplifying the system architecture and reducing costs.

This invention relates to the field of medical device technology and discloses a device for preventing a puncture guidewire from accidentally entering a dilator. The device includes: a dilator with a groove at its end; a resistance triggering unit disposed within the groove; a guidewire capable of passing through the dilator and contacting the resistance triggering unit, the guidewire's surface having a positively charged coating on at least a portion within the dilator; the resistance triggering unit includes: a negatively charged substrate, a hydrophobic film wrapped around the substrate surface, and a trigger layer wrapped around the outer surface of the hydrophobic film, the trigger layer having directional cracks on its surface; the trigger layer has an intact state and a torn state. When the guidewire moves in the forward direction, the trigger layer is intact; when the guidewire moves in the retraction direction, the trigger layer and the hydrophobic film tear, exposing the negatively charged substrate. The substrate and the guidewire coating generate electrostatic adsorption, creating resistance to the guidewire's movement. This provides accurate warning without interfering with normal operation, ensuring safety and ease of use.

It includes: an upper shell (10); a lower shell (20) provided with a ventilation grille (21); a chamber (30) located between the two shells (10, 20) and containing air; at least one atmospheric cold plasma generator (40) located between the two shells (10, 20) and configured to emit negatively charged ions into the air in the chamber (30) to generate enriched air; and an external device (50) connected by wiring to at least one atmospheric cold plasma generator (40) for powering it; such that when the device (1) is in operation and applied to the user's skin, the enriched air present in the chamber (30) is released to the outside through the ventilation grille (21) of the lower shell (20) so that the enriched air can be naturally absorbed by the user's own skin.

A drift elimination system for evaporative heat rejection equipment. The drift elimination system includes a first and second set of electrodes positioned apart from one-another in the air flow downstream of the fill and spray system. The first set of electrodes, optionally in the form of needles or thin plates are energized with a positive or negative charge. The second set of electrodes, optionally in the form of wavy plates or a wire mesh are energized with the opposite charge. Water droplets passing over or through the first set of electrodes accept a charge from the first set of electrodes and are attracted to the second set of electrodes where they are collected, removing the charged droplets from the airflow, reducing water loss and abating plume formation.

A low-pressure ionization chamber, a design method, and a medical linear accelerator. The low-pressure ionization chamber comprises a housing (100). A closed chamber is formed inside the housing (100), and a low-pressure environment lower than the standard atmospheric pressure is formed in the closed chamber, so that the ion recombination ratio of positive and negative charges is not greater than 0.01, thereby improving collection efficiency of positive and negative charges, and solving the technical problem in the existing technology of inaccurate monitoring results at an ultra-high dose rate due to the influence of ion recombination on a penetration-type air ionization chamber.

The application discloses a kind of antistatic master batch for film and preparation method thereof, the master batch includes following weight parts raw materials: PP master batch 80-100 parts, modified additive 0.1-0.5 parts, modified filler 3-8 parts, dicumyl peroxide 0.5-0.8 parts and dibutyl phthalate 2-5 parts, in the raw material extrusion process, the double bond on modified additive and modified filler is acted by dicumyl peroxide, and is grafted with polypropylene molecule, the structure containing quaternary ammonium salt on modified additive, the quaternary ammonium group with positive charge in quaternary ammonium salt molecule, can be combined on the surface of material with negative charge by electrostatic adsorption effect, directly neutralize surface static charge, form polyaniline connection between polypropylene molecule and graphene, P electron conjugated structure in polyaniline molecular chain, can form conductive path, so that material has good conductive effect.

There is disclosed a method of vectoring a rocket propulsion system producing a partly ionized exhaust jet along a longitudinal jet axis and through a nozzle. One or more pairs of electrodes may straddle the exhaust jet inside the nozzle or at a nozzle exit. A high-voltage DC supply may energize one or more of the electrode pairs with a strong electric field. A field intensity of the electric field may be scaled by the DC supply to proportionately deflect the exhaust jet away the longitudinal axis by a desired vectoring angle. The particular pair voltages sent to each pair of electrodes by the DC supply may be weighted for establishing a desired azimuth for the deflection. The strong electric field may laterally accelerate positively charged particles in the exhaust jet toward a negatively charged side of the one or more electrode pairs, thereby achieving the desired deflection and azimuth.

This application relates to an ethyl maltol hapten, a complete antigen, and their applications. The ethyl maltol hapten prepared by this invention fully retains the negatively charged hydroxyl group on the pyran ring of ethyl maltol, and introduces a linear arm with an active group from the oxygen atom of the pyran ring, completely exposing the structural features of ethyl maltol and improving the immunogenicity of the antigen. The further prepared ethyl maltol complete antigen and monoclonal antibody exhibit high sensitivity for ELISA detection, with an IC50 rating of [missing information]. 50 The value is 4.5 μg / L; ethyl maltol complete antigen and monoclonal antibody are used in colloidal gold immunochromatography, which can quickly and conveniently detect ethyl maltol. The colloidal gold immunochromatographic test strip prepared in this invention has a detection sensitivity of 1 µg / L for ethyl maltol.

This invention discloses a plastic particle separation device based on dielectric barrier discharge and triboelectric charging. In this invention, a screw feeding mechanism feeds the plastic particles into a vibrating feeder, which vibrates the particles before feeding them into a dielectric barrier discharge system. The dielectric barrier discharge system modifies the surface of the plastic particles. A discharge funnel I conveys the plastic particles from the dielectric barrier discharge system to a triboelectric charging device, which charges the plastic particles after the dielectric barrier discharge system, giving them positive and negative charges. A two-stage high-voltage electric field separation system, consisting of a primary separation chamber and a secondary separation chamber, performs two separations of the charged plastic particles in a high-voltage electric field. A collection box collects the separated plastic particles. This invention has the advantages of high separation efficiency and no pollution, and is suitable for plastic particle sorting operations.