19results about How to "Increase electrostatic attraction" patented technology

The invention relates to a preparation method and application of a mine water flocculation agent with an adsorption function. The mine water flocculation agent is prepared from the following raw materials: a mineral material, chitosan, water, silicate, acid, aluminum chloride salt, ferric chloride salt and polyacrylamide. The preparation method comprises the following steps: carrying out heat treatment on a mineral material, then adding water and chitosan, then adding silicate, reacting to generate polysilicic acid, grafting the polysilicic acid on chitosan macromolecules, then adding aluminum chloride salt and ferric chloride salt, reacting, finally adding polyacrylamide, and aging to obtain the composite material. The mine water flocculating agent provided by the invention can synchronously remove suspended matters, fluorides and COD (Chemical Oxygen Demand), and has the advantages of low dosage, short reaction time and high settling speed.

The invention discloses a preparation method and application of active cationic chitosan nanoparticles, which comprises the following steps: reacting a low-molecular chitosan triethylamine hydrogen sulfate ionic liquid ([(C2H5) 3NH] HSO4) solution with an aldehyde compound ethanol solution to form Schiff base protection on chitosan C2-site amino, and then reacting with 2, 3, 5, 6-tetramethyl-4-piperidine-2-one to obtain the active cationic chitosan nanoparticles. The preparation method comprises the following steps: carrying out nucleophilic substitution reaction on chitosan C6 in the presence of a basic catalyst by using 2, 3-epoxypropyl trimethyl ammonium chloride, then adding a chemical initiator, carrying out grafting reaction on chitosan C3 and acrylic acid, and then removing Schiff base protection on chitosan C2. Carboxylate anions of acrylic acid and cations of chitosan are subjected to cross-linking self-assembly through a hydrothermal reaction, and the chitosan nanoparticles which are high in stability, small in particle size, uniform in distribution and efficient and lasting in function are obtained. The prepared nanoparticles are high in reaction activity, contain a large amount of quaternary ammonium salt, amino dication groups and carboxyl groups, and have wide application prospects in the fields of dye adsorption, heavy metal adsorption, textile function finishing and the like.

The invention discloses a three-dimensional porous carbon material, a preparation method and application in adsorption of organic pollutants in a water body, and belongs to the technical field of water treatment.The preparation method comprises the steps that 1, zinc salt, 2-methylimidazole and a nitrogen source are dissolved in a methanol solution respectively, stirring reaction is conducted at the room temperature after mixing, standing is conducted, precipitates are taken, and a precursor solution is obtained; a precursor zeolite imidazate framework structure material is obtained; and 2, pyrolyzing the precursor zeolite imidazate skeleton structure material at 1100 DEG C under the protection of inert gas to obtain the three-dimensional porous carbon material. The three-dimensional porous carbon material disclosed by the invention has the advantages of large specific surface area, developed pore structure, abundant nitrogen-containing functional groups and reusability, can provide more adsorption active sites and enhance the electrostatic adsorption effect, and shows excellent adsorption performance and anti-interference capability on perfluorinated compounds, benzene series (such as benzene) and chlorinated organic compounds (such as parachloroaniline).

The invention belongs to the technical field of metal powder, and particularly relates to a preparation method of silver-coated copper powder, which comprises the following steps: mixing copper salt, a dispersing agent, a reducing agent, an auxiliary agent and a solvent, reacting to obtain a copper solution, mixing silver salt, the dispersing agent, a complexing agent and the solvent to obtain a silver-ammonia solution, mixing the silver-ammonia solution and the copper solution, reacting to obtain the silver-coated copper powder, the preparation method of the silver-coated copper powder is simple, economical and reliable, the glutamic acid additive is added in the silver coating process, the conversion rate of a silver layer reaches up to 100%, and the prepared silver-coated copper powder is good in dispersity and high in compactness.

The invention discloses a film covering and packaging machine for plastic parts with arc-shaped surfaces, and relates to the technical field of film covering, the film covering and packaging machine for the arc-shaped plastic parts integrates transmission and packaging, and a transmission part of the film covering and packaging machine comprises a mounting plate, a transmission roller, a transmission belt and a driving device; and the packaging part is provided with a leveling roller, an ion fan, a negative pressure dust collector, an electrostatic generator, a steering roller, a film covering roller and a laminating roller, the diameter of the laminating roller is adjustable, the laminating roller adapts to different arc-shaped plastic parts, it is ensured that the film is completely electrostatically adsorbed and attached to the surfaces of the plastic parts, and the laminating quality is guaranteed.

The invention discloses a filter material corona charged particle bed and a filtering method thereof. The electric particle bed comprises a particle bed shell, an air distribution device and a filtering layer filled with filter material particles, wherein the air distribution device and the filtering layer are sequentially arranged in the particle bed shell from bottom to top; the particle bed shell is provided with an air inlet located above the filter layer and an air outlet located below the air distribution device, a corona discharge electrode is horizontally buried in the filter layer, a grounding electrode is horizontally placed above the filter layer and below the air inlet, the corona discharge electrode is connected with the high-voltage output end of the high-voltage pulse switching power supply, and the grounding electrode is connected with the high-voltage output end of the high-voltage pulse switching power supply. The grounding electrode is connected with the grounding end of the high-voltage pulse switching power supply and a ground wire; a gap corona charge region is formed in a space between the corona discharge electrode and the grounding electrode; the electrostatic enhanced dust collector has the advantages that the charged filter material particles are utilized to generate strong electrostatic attraction on dust with charges opposite to the polarity of the charged filter material particles, the electrostatic enhanced filtering effect is improved, and the filtering efficiency is remarkably improved.

The invention discloses a temperature-adjusting antibacterial knitted fabric and a preparation method thereof, and belongs to the technical field of functional clothing, Ti3AlC2 powder is soaked in an HF solution, stirring reaction is performed, and Ti3C2Tx MXene is formed. And purifying and stripping by adopting methods such as centrifugal cleaning and ultrasonic treatment to obtain the high-quality MXene micron sheet. The MXene-PVA material is prepared by grafting polyvinyl alcohol with good affinity and centrifuging. An emulsion-solvent evaporation method is utilized to prepare the temperature-adjusting antibacterial microcapsule which takes polypyrrole as a shell material and lauric acid as a core material. The MXene-PVA material and the temperature-adjusting antibacterial microcapsules are compounded through mechanical stirring and electrostatic adsorption, the obtained temperature-adjusting antibacterial functional MXene material is mixed with a PVA adhesive, and the temperature-adjusting antibacterial finishing agent for knitted garments is prepared. The finishing agent is finished on knitted garments through an impregnation method, so that the knitted garments are endowed with excellent temperature adjusting and antibacterial properties.

The invention relates to the technical field of lithium resource extraction, and provides a composite fiber membrane adsorbent as well as a preparation method and application thereof. The composite fiber membrane adsorbent comprises a polymer fiber membrane and a manganese lithium ion sieve coated carbon material loaded on the polymer fiber membrane. The preparation method of the composite fiber membrane adsorbent comprises the following steps: pre-treating a carbon material in an acid solution to obtain a pre-treated carbon material; a manganese source, a lithium source and a doped metal source are subjected to a hydrothermal reaction and calcined, and a manganese-series lithium ion sieve precursor is obtained; mixing the pretreated carbon material and a manganese-series lithium ion sieve precursor, and calcining to obtain a manganese-series lithium ion sieve precursor coated carbon material; and dispersing the manganese-series lithium ion sieve precursor coated carbon material into a polymer solution, spinning, and pickling to remove lithium to obtain the composite fiber membrane adsorbent. The composite fiber membrane adsorbent not only has high adsorption capacity, but also shows relatively low manganese solution loss, and can adapt to long-time cyclic lithium extraction operation.

The invention provides an acylthiourea and polyethylene polyamine condensation compound, a phosphorus-free corrosion and scale inhibitor and a preparation method, and relates to the technical field of industrial water treatment.The acylthiourea and polyethylene polyamine condensation compound contains amide, amino and other polar groups, the electrostatic attraction force and the chelation process of the acylthiourea and polyethylene polyamine condensation compound and zinc ions and calcium ions in water are enhanced, the scale inhibition efficiency is improved, and the corrosion and scale inhibitor has the advantages of being environmentally friendly and free of pollution. The phosphorus-containing corrosion and scale inhibitor has the effect similar to that of phosphorus, can achieve the effect similar to that of a phosphorus-containing corrosion and scale inhibitor through compounding and synergism with other raw materials, can completely replace phosphorus, and meets the environment-friendly requirement; the phosphorus-free corrosion and scale inhibitor provided by the invention does not contain phosphorus, causes little pollution to the environment after being discharged and is easy to biodegrade in a water body, and in the corrosion and scale inhibitor provided by the invention, all the components have a synergistic effect, so that stable storage of the product can be ensured, and the product also can be ensured to have good corrosion and scale inhibition performance; and a new thought is developed for development, design and application of non-phosphorus products.

This application relates to the field of nozzle technology and discloses a high-uniformity electrostatic misting nozzle structure, including a nozzle body with a liquid inlet at one end and a mist outlet at the other end. The nozzle body has an internal mounting cavity for mounting an atomizing component. The atomizing component includes a pressure atomizing nozzle and a rotating atomizing disc. The pressure atomizing nozzle is installed at the liquid inlet of the nozzle body, and the rotating atomizing disc is rotatably connected to the inner wall of the nozzle body via a mounting ring, and is opposite to the liquid outlet direction of the pressure atomizing nozzle. The rotating atomizing disc is driven to rotate by a drive mechanism outside the nozzle body. In this invention, the electrostatic generating component charges the droplets, enhancing the electrostatic adsorption force between the droplets and the surface of plants or sprayed objects. Compared to traditional nozzles, the droplets adhere more firmly, reducing waste caused by drifting and slippage, improving the utilization rate of pesticides, coatings, and other materials, reducing costs, and reducing environmental pollution.

The invention discloses an attaching and slitting machine which is characterized in that a slitting device is arranged at one end, close to a first supporting frame, of a base and located above a conveying belt, an inner supporting frame with a through hole formed in the top is arranged in the conveying belt, and an electrostatic generator with a plurality of electrostatic probes is arranged in the inner supporting frame and located below the through hole; an ion generator with two ion probes is symmetrically arranged on the downstream of the conveying direction of the conveying belt and is symmetrical about the axis of the conveying belt, a scraping frame with a plurality of air holes is arranged between the two side supporting plates, and an air suction machine is arranged on one side of the scraping frame. And an air blower with a spray head is arranged above the scraping frame and at the tops of the two side supporting plates. According to the attaching and slitting machine, the local electrostatic adsorption force is enhanced, the stability of materials in the conveying process is improved, the adhered materials can be conveniently separated from the conveying belt, and the situation that the materials adhere to the conveying belt is greatly reduced.

The invention provides a selenium-containing wastewater treatment method, and belongs to the technical field of wastewater treatment. The treatment method comprises the following steps: adjusting the pH value of the selenium-containing wastewater to 7-10, adding an organic-inorganic composite flocculant, carrying out stirring reaction, and carrying out solid-liquid separation to obtain primarily treated wastewater; introducing the primarily treated wastewater into a tower oxidation reactor for ozone oxidation reaction to oxidize tetravalent selenium into hexavalent selenium; the wastewater subjected to ozone oxidation is adjusted to be weakly acidic and then flows through a manganese sand filter, and selenium in the wastewater is adsorbed by manganese sand; wherein in the tower-type oxidation reactor, the wastewater and ozone gas are subjected to gas-liquid countercurrent contact reaction and then subjected to standing reaction. According to the method, three-stage processes are set, including flocculation and sedimentation of an organic and inorganic composite flocculant, step-by-step oxidation of ozone, filtration and adsorption of manganese sand under weak acidity, and efficient oxidation of selenite (tetravalent selenium) into selenate (tetravalent selenium), so that the selenium removal efficiency is improved, and the removal rate of selenium in selenium-containing wastewater reaches up to 99% or above.

The invention relates to the technical field of batteries, and provides an ionic liquid additive for improving the interface stability of a hard carbon negative electrode of a sodium-ion battery and application of the ionic liquid additive in order to solve the problems of low ion transmission rate, poor electrode / electrolyte interface stability and the like of the hard carbon negative electrode in practical application in the prior art. The electrolyte prepared based on the ionic liquid additive comprises electrolyte salt, the ionic liquid additive and an organic solvent, wherein the electrolyte salt is sodium salt; the ionic liquid additive is pyrrolidine type dication ionic liquid, and the organic solvent is one or a mixture of carbonic ester or ether solvents. The electrolyte prepared by the invention not only improves the migration ability of Na < + >, but also promotes the construction of a compact and uniform SEI film. A NaHC half battery and a total battery assembled by an electrolyte prepared from the dicationic ionic liquid additive provided by the invention can significantly improve the long cycle stability. After the NaHC half cell circulates 400 times under the current density of 100 mA / g, the capacity retention rate reaches 90.4%.

The invention relates to an electrostatic chuck and semiconductor equipment. The electrostatic chuck comprises an insulating substrate and an electrostatic electrode, the electrostatic electrode comprises a central electrode and an edge electrode; the central electrode is positioned in the central area of the insulating substrate; the peripheral side of the central electrode is surrounded by the edge electrode; wherein the conductive polarity of the central electrode is opposite to that of the edge electrode; the area of the central electrode is different from that of the edge electrode. According to the invention, on the premise of ensuring the uniformity of ion implantation, the problem of non-uniform distribution of electrostatic adsorption force on the surface of the wafer caused by wafer warping can be improved, and the aggravation trend of the warping phenomenon of the wafer can be inhibited, so that the effective control of the bending degree of the wafer is realized, and the improvement of the yield of wafer products is facilitated.

The utility model provides a plant protection unmanned aerial vehicle bipolar contact type electrostatic spraying system, which comprises an unmanned aerial vehicle, a bipolar contact type electrostatic spraying device and a conical electrode group, the spraying device is arranged on the unmanned aerial vehicle, and the conical electrode group is arranged in a charging device and is used for generating a point discharge effect. The spraying device comprises a static electricity generating device and a spraying assembly, the static electricity generating device charges a pesticide solution through the point discharge effect generated by the conical electrode set, and the spraying assembly is used for charging the pesticide solution and atomizing the pesticide solution into fog drops to be sprayed out; the electrostatic generation device is formed by connecting two electrostatic generators in series, the two electrostatic generators are the same in voltage and opposite in polarity, and the positive polarity electrostatic generator and the negative polarity electrostatic generator are connected through a buffer inductor. And a positive output electrode and a negative output electrode of the electrostatic generator are respectively connected with the two conical electrode groups, so that the uniformity and penetrability of spraying are obviously improved.

This invention relates to the field of wastewater treatment technology, and more particularly to a method for enhancing anaerobic ammonia oxidation (AAO) denitrification using iron-loaded polyurethane porous materials. The method includes the following steps: Anaerobic ammonia oxidation sludge, iron-loaded polyurethane porous materials, and wastewater containing ammonia nitrogen and nitrite nitrogen are thoroughly mixed in an anaerobic reactor and reacted under anaerobic conditions at a temperature of 31-35°C. The iron-loaded polyurethane porous materials are prepared as follows: polyurethane sponge is selected as a carrier, cut and cleaned, and then immersed and stirred in a mixed iron salt solution for a period of time. The pH of the mixed solution is adjusted to alkaline, resulting in the formation of a red precipitate. The iron-loaded polyurethane porous materials are then hydrothermally synthesized. The mixed iron salt solution includes ferric chloride and ferric nitrate. The carrier material prepared by this invention, when applied to an anaerobic ammonia oxidation system, can effectively shorten the process start-up time, promote the enrichment and biofilm formation of anaerobic ammonia oxidizing bacteria, and achieve a high total nitrogen removal rate.

This invention belongs to the field of PVC membrane technology, specifically relating to a water-permeable transparent PVC electrostatic membrane and its preparation method. The water-permeable transparent PVC electrostatic membrane provided by this invention comprises PVC resin powder, a composite plasticizer, a water-resistant modifier, an electrostatic reinforcing agent, a composite stabilizer, a transparent modifier, a filler, an anti-migration agent, and stearate. This invention uses waterborne polyurethane and γ-methacryloyloxypropyltrimethoxysilane as a crosslinking compound as a water-resistant modifier, effectively improving the water resistance of the PVC electrostatic membrane; it uses diallylamine and epichlorohydrin to prepare a heteroazacyclobutane structure, which is then copolymerized with allyltrimethylammonium chloride to obtain an electrostatic reinforcing agent, improving the electrostatic adsorption force of the PVC electrostatic membrane; it uses a calcium-zinc composite stabilizer and phosphite to form a composite stabilizer, and uses polypropylene adipate and erucamide to form an anti-migration agent, effectively improving the temperature resistance and stability of the PVC electrostatic membrane.

A biomimetic silicification-enhanced catalyst and its preparation method are disclosed. The preparation method includes the following steps: S1: Urea, iron salt, and copper salt are added to a first solvent to obtain a mixed solution; S2: The mixed solution undergoes a hydrothermal reflux reaction to obtain particle units; S3: The particle units undergo a silicification reaction with ammonia and a silica precursor to obtain a catalyst. The catalyst prepared by this method can not only reduce its band gap by copper doping to utilize visible light as a reaction light source and reduce reaction conditions, but also inhibit the aggregation of catalyst particles by utilizing the mesoporous silica layer on the surface, expose more reaction sites, and limit the heat loss of the internal particle units, thereby increasing the reaction temperature. This can effectively improve the organic matter treatment effect of the catalyst. It adsorbs and degrades dyes in wastewater through two modes: electrostatic attraction and catalytic decomposition of hydrogen peroxide to generate strong oxidizing free radicals.

The invention provides a carbon capture material based on polyion liquid modified MOF and a preparation method and application thereof, and belongs to the technical field of material preparation and carbon capture. The preparation method comprises the following steps: firstly, preparing a positive charge structure PIL-MIL-101 composite material of a polyion liquid (PILs) modified metal organic framework (MOFs), and preparing a carbon trapping material by taking the positive charge structure PIL-MIL-101 composite material as a filling agent; the carbon trapping material takes a positive charge structure PIL-MIL-101 as a filling agent and a polyether polyimide block Pebax as a polymer matrix, and is formed by physically blending the filling agent and the polymer matrix at normal temperature; the carbon capture material improves the selectivity and permeability of CO2 / CH4 in the membrane, has good selectivity to CO2 / CH4, and can efficiently separate CO2 / CH4. The polyion liquid modified MOF carbon capture material and the preparation method thereof are simple and wide in practicability, and have excellent natural gas decarburization performance, so that the mixed matrix membrane has a good prospect in many applications related to CO2 membrane separation.