144 results about "Electrostatic attraction" patented technology

The invention belongs to the technical field of biochar immobilized microorganisms, and particularly relates to a preparation method of a biochar-based composite material for efficient immobilization of adaptive microorganisms. The microbial loading capacity is remarkably improved, the chain structure of the attapulgite layer provides a large number of linear adsorption sites, the porous structure of the biochar forms a three-dimensional adsorption space, and the chain structure and the porous structure of the biochar construct a synergistic adsorption mode; when the ammonium ferric citrate is modified, a decomposition product of the ammonium ferric citrate can form new mesopores / micropores in the carrier to enlarge the specific surface area, and the Fe element can be coordinated with an Si-O bond of the attapulgite and a carbon skeleton of the charcoal, so that pore collapse is inhibited, and the cycle stability is improved. And hydroxyl groups on the surface of the attapulgite and oxygen-containing functional groups of the charcoal cooperate with each other, so that electrostatic attraction and hydrogen bond binding force to the microorganisms are enhanced. The microorganism survival microenvironment is optimized, the composite carrier has the ion exchange capacity of the attapulgite and the water and fertilizer retention characteristic of the biochar, and a stable buffer environment and nutrition reserve can be provided for microorganisms.

The invention aims to provide a preparation method and application of a CMC / PVA active packaging film coated with chitosan-tannic acid on the surface, and belongs to the field of food preservation. Comprising the following steps: firstly, preparing a CP40 film, and then preparing a CP40 / CT% composite film: preparing a chitosan solution with the mass concentration of 1%, adding tannic acid TA into the chitosan solution, stirring for 30 minutes in a shading manner at room temperature to form a CT coating solution, flatly laying the prepared CP40 film on a planar carrier, coating the surface of a substrate film with the CT coating solution, and putting the composite film and the carrier into a drying oven at 45 DEG C for constant-temperature drying, so as to obtain the CP40 / CT% composite film. And after the solvent of the coating layer is completely volatilized, taking out and stripping to obtain the CP40 / CT% composite film. Under the action of hydrogen bonds and electrostatic attraction, a compact network structure of an amorphous-weak crystal region is formed in the composite film, so that the interface bonding strength of the film is enhanced, and the rigidity and flexibility of the film are balanced. The physical and chemical properties and biological activity of the composite membrane are synergistically optimized, and the composite membrane has obvious degradation signs after being buried in soil for 35 days and belongs to a biodegradable material.

This invention discloses a denitrification agent for low-temperature denitrification and its preparation method, belonging to the field of denitrification technology. The denitrification agent is prepared using diatomaceous earth as the matrix framework, compounded with calcium chloride, calcium bicarbonate, chitosan, sodium lignosulfonate, and TRIS (tris(hydroxymethyl)aminomethane). The components synergistically optimize the pore structure. Chitosan and sodium lignosulfonate achieve self-assembly through hydrogen bonding and electrostatic attraction. Nitrogen oxides are removed through a dual action of alkaline absorption and electrostatic adsorption. The TRIS can be regenerated and reused after alkali washing. This invention's denitrification agent solves the problems of high reaction temperature, poor low-temperature activity, low efficiency in removing low-concentration nitrogen oxides, and easy ammonia escape in traditional SCR denitrification technology, and can meet the requirements for NO removal in flue gas from power plants. x ≤15mg / m 3 It has ultra-low emission indicators, and features excellent low-temperature activity, high denitrification efficiency, and recyclability. It is suitable for denitrification treatment of low-temperature flue gas in power plants, etc.

This invention discloses a ternary composite adsorbent based on iron-catechol-boric acid, its preparation method, and its application, belonging to the field of dyeing and printing wastewater treatment. The adsorbent of this invention uses tannic acid with a surface rich in catechol groups as a substrate. A stable metal-phenolic network is formed through the coordination of trivalent iron with catechol groups, efficiently capturing anions using metal bridging and electrostatic attraction to form the adsorption core. Boric acid groups are further introduced as specific recognition units, forming specific dynamic covalent bonds with the catechol groups of anionic dyes. Compared with traditional adsorbents, the adsorbent of this invention provides ultra-high adsorption capacity and selectivity through the synergistic effect of multiple mechanisms, including electrostatic adsorption, coordination complexation, hydrogen bonding, and reversible covalent bonding of borate ester bonds. It can achieve efficient desorption of dyes and recycling of materials, and efficiently and rapidly remove anionic dyes from water.

The utility model relates to the technical field of universal crushers, in particular to an anti-residue universal material crusher. The device comprises a crushing operation shell, a discharging shell is arranged at the bottom of the crushing operation shell, a supporting table is arranged on the outer wall of the crushing operation shell, a cylindrical screen is movably arranged in the crushing operation shell, a crushing assembly is further arranged in the crushing operation shell, a screen rotating assembly is arranged below the cylindrical screen, and the screen rotating assembly is in transmission connection with the cylindrical screen. The screen rotating assembly is further in transmission connection with the smashing assembly, and a feeding assembly is arranged on the front face of the smashing operation shell. Through the matched design of the screen rotating assembly and the scrapers, the motor drives the cylindrical screen to rotate at a low speed through transmission of the chain wheel and the chain while driving the crushing operation, the scrapers tightly attached to the inner wall of the screen continuously scrape, powdery materials adsorbed or adhered to the surface of the screen due to static electricity can be removed in time, and the problem of screen blockage is effectively solved through the design; and the screen is always kept in a good transparent state.

The invention relates to a sealing material and a decoloring kettle applied to intermediate synthesis, and belongs to the technical field of composite materials. The compatilizer with a phosphoric acid structure is prepared, the compatilizer is used for treating and modifying the aluminum filler, a quaternary ammonium salt structure and a long-chain alkyl structure are introduced to the surface of the modified aluminum filler, the quaternary ammonium salt structure can generate electrostatic attraction with sulfonic acid groups in perfluorosulfonic acid resin, and the long-chain alkyl structure can generate long-chain alkyl groups in the perfluorosulfonic acid resin; the long-chain perfluoroalkyl structure can be entangled with a polytetrafluoroethylene resin molecular chain, and the two effects are synergistic, so that the binding capacity of the aluminum filler and the polytetrafluoroethylene-perfluorosulfonic acid resin composite material is effectively improved, and a polytetrafluoroethylene phase and a perfluorosulfonic acid resin phase can be bridged; the overall mechanical property of the composite material is effectively improved.

The invention discloses a sodium alginate-quaternary ammonium salt cationic surfactant pesticide adjuvant as well as a preparation method and application thereof, and belongs to the technical field of pesticide adjuvants. The invention discloses a sodium alginate-quaternary ammonium salt cationic surface active agent pesticide adjuvant. The sodium alginate-quaternary ammonium salt cationic surface active agent pesticide adjuvant is prepared from sodium alginate and a quaternary ammonium salt cationic surface active agent. The quaternary ammonium salt cationic surface active agent and the sodium alginate can form the pesticide adjuvant with uniform size through simple electrostatic attraction and hydrophobic interaction between surface active agent carbon chains. Tebuconazole added with the pesticide adjuvant has a certain synergistic effect on the antibacterial activity of alternaria alternata, fusarium oxysporum and botrytis cinerea. And the auxiliary agent is non-toxic to the germination of plants, and accords with the development trend of green pesticides.

The invention provides a phosphorus-fixing lanthanum-based nano composite material as well as a preparation method and application thereof, and relates to the field of novel nano composite materials. According to the material, lysozyme protein fibers are taken as a structural template, a confinement space is constructed by utilizing the ultrahigh length-diameter ratio of the lysozyme protein fibers, and controllable synthesis of the sub-5nm high-dispersion lanthanum oxide nanoparticles is realized. Functional groups in a protein chain can be enriched and nucleation sites can be provided through electrostatic attraction and key coordination synergistic effect, so that the lanthanum-based protein fiber nano composite material is formed. When the material is used for treating phosphorus wastewater, efficient phosphorus removal and long-term phosphorus fixation are realized through an enrichment-conversion synergistic mechanism: phosphate ions are enriched through electrostatic adsorption, and thermodynamically stable lanthanum phosphate is generated in situ at lanthanum active sites. According to the method, gt is still kept in the presence of high-concentration equal competitive ions; the phosphorus removal rate is 90%, the generated lanthanum phosphate can be used as a slow-release phosphate fertilizer or an industrial phosphorus chemical raw material, and closed-loop conversion from pollution purification to resource utilization is realized.

The present disclosure discloses a galvanometer unit, a preparation method thereof, a scanning mirror and a radar system. The galvanometer unit comprises a first substrate and a second substrate which are bonded, the second substrate comprises a galvanometer structure accommodated in a cavity structure, the galvanometer structure has a rotation axis, the first substrate comprises an electrostatic driving structure and a flat plate electrode which is arranged to face the second substrate and is insulated from the electrostatic driving structure, the electrostatic driving structure drives the flat plate electrode to reciprocate in a first direction, the flat plate electrode comprises a first main electrode and a second main electrode which are located on different sides of the rotation axis, and during the reciprocation of the flat plate electrode driven by the electrostatic driving structure, the overlapping area of the first main electrode and the second main electrode with the galvanometer structure changes, so that the electrostatic attraction force acting on the galvanometer structure changes, and the galvanometer structure is driven to rotate along the rotation axis.

Inorganic particles comprised in an aqueous dispersion according to the present invention consist of agglomerates of crystalline and amorphous microparticles, and exhibit spherical and smooth surfaces. The spherical appearance, low crystallinity, and narrow particle size distribution of the inorganic particles are further advantageous in reducing scratch defects in a CMP process. In addition, since the microparticles on the inorganic particle surfaces provide more active sites and thus the removal rate is high, the inorganic particles may be advantageous as next-generation CMP polishing materials. In addition, the aqueous dispersion according to the present invention further comprises an amino acid, and the amino acid may be adsorbed on a surface of a silicon oxide wafer to strengthen electrostatic attraction between the silicon oxide wafer and the inorganic particles, resulting in an effect of further improving the removal rate.

The invention discloses metal wire mesh laser cutting equipment, and relates to the technical field of metal wire mesh processing devices, the metal wire mesh laser cutting equipment comprises a laser cutting machine, the laser cutting machine comprises a frame body, a movable cutting head is connected to the frame body, the conveying system is connected to the frame body and conveys a metal wire mesh; and the bearing table comprises a working table fixedly connected to the frame body, and a plurality of openings are formed in the working table. The top of the bearing table, the top of the workbench and the top of the tray are provided with triangular net-shaped protrusions, the contact area with a metal wire net is greatly reduced, the situation that the metal wire net is hung or deflected during conveying is avoided, and the cutting stability is guaranteed; during cutting, the tray protrusion is connected with negative electricity, a static environment is formed through electric conduction of the metal wire mesh, after cutting, the tray base plate is connected with positive electricity, a cut piece is adsorbed through static attraction, it is ensured that the cut piece is stably separated from excess materials, and the separation problem caused by micro-melting adhesion or static electricity is effectively avoided.

The present application provides a novel nano-polysaccharide composite particle. The nano-polysaccharide composite particle is prepared from one polycationic polysaccharide and two polyanionic polysaccharides by means of electrostatic attraction and a complexation reaction. The nano-polysaccharide composite particle has an excellent active ingredient encapsulation efficiency, so that the nano-polysaccharide composite particle can be uniformly distributed within cells upon uptake.

The invention relates to a flame-retardant indigo blue composite dye and a preparation method thereof, and belongs to the technical field of dyes. According to the indigo blue composite dye and the preparation method thereof, the synergist is prepared, the synergist and indigo blue are subjected to ball milling and blending to obtain the indigo blue composite dye, phosphite ester groups and benzotriazole in the synergist can synergistically form a firm heat-insulation flame-retardant barrier, the indigo blue dye is endowed with good flame retardance, and a dyed fabric better meets the fireproof safety requirement; the benzotriazole can also enhance the ultraviolet absorption performance of the dyed fabric, and the phosphite group can also have a triangular pyramid-shaped space structure, so that the synergist is integrally of a three-dimensional structure, pi-pi accumulation among indigo molecules is effectively prevented, and the indigo has good dispersion stability; quaternary ammonium salt cations in the synergist enable the dyed fabric to achieve the antistatic effect, and meanwhile, the quaternary ammonium salt cations and indigo blue in the dyeing process can be mutually attracted through electrostatic attraction, so that the color fixing effect is achieved.

The invention discloses an HRP chemiluminescent substrate system, a kit and a preparation method, the HRP chemiluminescent substrate system is composed of a liquid A and a liquid B which are physically isolated and stored; the solution A is an alkaline buffer system with the pH value of 9.0-9.6, and comprises isoluminol or a salt substrate thereof, a cationic surface active agent CTAC and a metal chelating agent diethylene triamine pentaacetic acid; and the solution B is an acidic solution with the pH value of 4.5-5.5, and comprises an oxidizing agent and a reinforcing agent N-(3-chloro-4-hydroxyphenyl) acetanilide. According to the invention, the reinforcing agent N-(3-chloro-4-hydroxyphenyl) acetanilide is placed in the acidic liquid B, when the acidic liquid B is mixed with the alkaline liquid A, the mixed system is maintained at a specific pH value of 8.3-8.6, and the reinforcing agent is rapidly dissociated into phenoxy anions; and carrying out in-situ capture and enrichment on a micelle interface by CTAC cationic micelles with positive charges, which exist in the solution A in advance, through electrostatic attraction. And in cooperation with a low-ion-strength environment brought by no buffer salt in the liquid B, the system ensures the high activity of the HRP enzyme, realizes directional interface catalysis of the enhancer, and significantly improves the luminous efficiency and stability.

This invention discloses a carbon nanotube composite dispersant and a carbon nanotube dispersion. The carbon nanotube composite dispersant is composed of an anionic dispersant and a cationic dispersant, wherein the anionic dispersant is a small molecule containing an aromatic ring anion, and the cationic dispersant is a cationic water-soluble polymer. This invention also discloses a carbon nanotube dispersion obtained based on this carbon nanotube composite dispersant. This composite dispersant utilizes the strong electrostatic attraction between anions and cations, resulting in a carbon nanotube dispersion with advantages such as fewer defects, smaller particle size, and better conductivity, as well as being environmentally friendly and stable. This composite dispersant is based on common dispersants and has a significant cost advantage.

A particulate collecting device (100) attachable to a vehicle for collecting or capturing particulates that are released from a tyre or a wheel (W) of the vehicle through wear on or against a driving surface (S) when the vehicle is driven on the driving surface. The device comprises an electrostatic filter unit (110) mountable in an operative position in close proximity to the tyre or the wheel of the vehicle for receiving a flow of particulates (FI) from a contact point (CP) between the tyre or wheel and the driving surface. The filter unit (110) is configured to collect or capture the particulates in the flow by electrostatic attraction.

This invention belongs to the field of oilfield drilling technology, specifically relating to a method for preparing a modified sulfonated phenolic resin for drilling fluids. This modified sulfonated phenolic resin is prepared by free radical polymerization, chemically bonding functional monomers containing both sulfonic acid anions and quaternary ammonium cations into the phenolic resin structure. The quaternary ammonium cation groups adsorb negatively charged clay particles, while the adamantyl group can adsorb onto the hydrophobic regions of the clay particles through association. This dual adsorption mechanism of hydrogen bonding and electrostatic attraction allows the sulfonated phenolic resin to rapidly adsorb onto the clay surface. Furthermore, the abundant sulfonic acid anions form a dense solvation layer after hydration, which, when the phenolic resin rapidly adsorbs onto the clay surface, forms a dense coating, preventing contact between the clay and water, thus stabilizing the clay particles and forming a dense mud cake. This results in a phenolic resin with excellent filtration loss reduction properties.

The invention discloses a binder and a preparation method thereof, an electrode structure and a battery. The binder comprises a first component and a second component, the first component comprises oxidized seaweed gel obtained by carrying out controllable oxidation modification on seaweed gel, the second component comprises clay minerals with the surfaces modified by a modifier, and the first component and the second component are cross-linked through electrostatic interaction to form a three-dimensional network structure. According to the invention, the first component is modified by controllable oxidation by adopting a colloid from a specific seaweed source, and a proper amount of carboxyl is introduced while a high-molecular-weight skeleton is retained; the second component adopts a clay mineral with the surface modified by a modifier, and is crosslinked with the first component through electrostatic interaction to form a three-dimensional network structure, and the three-dimensional network structure is realized on a molecular level: hydroxyl / carboxyl of the first component reacts with an active substance to form a hydrogen bond, and electropositive quaternary ammonium salt of the second component is combined with electronegative carboxyl of the first component to form electrostatic attraction; and the nanosheet layer prevents electrolyte from permeating to form space barrier.

The present disclosure relates to an electroadhesive device, a method for manufacturing the same, and an electrostatic clutch comprising the same, and more specifically, to an electroadhesive device capable of being applied to various fields, such as an electrostatic clutch, by freely controlling electrostatic attraction even at low operating voltages through the application of a polyanionic ionomer and a polycationic ionomer in a heterojunction structure, a method for manufacturing the same, and an electrostatic clutch comprising the same.

The application discloses a La-CPAN-PEI fluorine removal material and a preparation method and application thereof, and belongs to the technical field of water treatment. The preparation method of the material comprises the following steps: heat treatment of polyacrylonitrile fibers in a protective gas to obtain cyclized polyacrylonitrile fibers; dispersing the cyclized polyacrylonitrile fibers, an alkali catalyst, an organic lanthanum source and polyethyleneimine in a degassed alcohol solution, and carrying out a solvothermal reaction to obtain the La-CPAN-PEI fluorine removal material. The pH response characteristic of the PEI chain is utilized to realize accurate regulation and control of a fluorine ion adsorption process, and the process presents the characteristics of 'acid absorption and alkali desorption' and dynamic balance in an intermediate pH region. The material has high adsorption capacity, excellent selectivity and simple acid-alkali cyclic regeneration capacity through the synergistic effect of a triple mechanism of 'electrostatic attraction-conformation mass transfer-precipitation fixation', and has a good application prospect in deep treatment of fluorine-containing wastewater.

The invention discloses an organic lithium salt containing a cyano group and a preparation method and application thereof, the organic lithium salt containing the cyano group is used as a composite solid electrolyte additive, and the additive is uniformly dispersed in a polyethylene oxide (PEO) matrix to disturb regular arrangement of a polymer chain, so that the crystallinity of the polymer chain is reduced; the movement capability of a polymer chain segment is enhanced; the cyano group has high charge density and linear structure, can provide strong electrostatic attraction and space accessibility, has strong polarity and coordination ability, can significantly change the coordination environment of lithium ions, promotes dissociation and migration of the lithium ions, and improves the ionic conductivity and migration number of the solid electrolyte. Furthermore, as a lithium-containing additive, active lithium loss caused by a solid electrolyte interface (SEI) film formed on the surface of a negative electrode of the battery during first-cycle charging can be compensated, so that the first coulombic efficiency of the battery is improved; the introduction of cyano group also improves the oxidation resistance of molecules, and is beneficial to improving the cycle stability of the battery.

The application provides a debris collecting device based on electrostatic adsorption and belongs to the technical field of adsorption grabbing equipment. The problem of cleaning debris in the narrow space in the aircraft fuel tank is solved. The device comprises an electrostatic chuck, a mechanical arm and a plurality of automatic opening and closing storage mechanisms, the plurality of automatic opening and closing storage mechanisms are evenly arranged on the outer side of the electrostatic chuck in the circumferential direction, a supporting column is arranged on the top of the electrostatic chuck, the top end surface of the supporting column is connected with the mechanical arm, the automatic opening and closing storage mechanism comprises a linear sliding rail, a leaf spring and a storage finger, one end of the linear sliding rail is arranged obliquely on the outer side of the top of the electrostatic chuck, a sliding block is arranged on the linear sliding rail in a sliding mode, a plurality of storage fingers are evenly arranged on the outer side of the electrostatic chuck in the circumferential direction, the sliding block is fixedly connected with the inner wall on one side of the storage finger, and the outer side of the bottom of the mechanical arm is connected with one side of the top of the storage finger through the leaf spring. It is mainly used for cleaning the debris in the aircraft fuel tank.

The invention discloses a composite catalytic electrode material which comprises a (CoNiFe) OOH nano-porous structure and MoO4 < 2-> anions adsorbed on the (CoNiFe) OOH nano-porous structure, the composite catalytic electrode material is obtained by electrochemical oxidation of a MoO3 / CoNiFe composite precursor, and the MoO4 < 2-> anions anchor cation catalytic sites of (CoNiFe) OOH. Under the alkaline electrolyte condition, MoO4 < 2-> anions generated by MoO3 in-situ reaction are adsorbed on (CoNiFe) OOH, the MoO4 < 2-> anions can anchor cation catalytic sites Co, Ni and Fe in the (CoNiFe) OOH through the electrostatic attraction effect, dissolution of metal cations in an electrolyte solution is reduced, and the oxygen evolution catalytic stability of the electrode is guaranteed.

An existing heat-conducting / high-heat-conducting phase-change composite film based on interaction of interface zwitterions has the defects that the interface thermal resistance between layers is high, a phase-change material is prone to leakage, and the synergistic efficiency of functional layers is low. In the prior art, physical blending or simple stacking is mostly adopted, the interlayer binding force is weak, the transfer efficiency of heat between a phase change layer and a heat conduction layer is low, and efficient heat management of a high-power-density electronic device cannot be met. According to the invention, an intelligent structure with external conduction, internal storage and ionic bonding is constructed. The outer layer is made of anionic high-thermal-conductivity polyurethane, is responsible for rapidly diffusing heat and is also used as a packaging shell; the inner layer is cation modified paraffin and is responsible for absorbing and buffering pulse heat; the inner layer and the outer layer realize strong interface bonding through anion-cation electrostatic attraction, and thermal resistance is weakened. The interface bonding between the heat conduction layer and the phase change layer is strengthened fundamentally, and an efficient, stable and low-heat-resistance heat transfer channel is constructed.

This application relates to the technical field of electrochemical machining and provides a force-sensing-based electrolyte vibration electrochemical discharge machining device and method. The force-sensing-based electrolyte vibration electrochemical discharge machining device includes an electrochemical discharge power supply, an electrode assembly, a spindle assembly, an electrostatic attraction assembly, a clamping assembly, a moving platform, a force-sensing unit, an ultrasonic vibration unit, an electrolyte replacement assembly, a motion controller, a gas supply unit, a marble platform, an air flotation platform, and a control unit. This device can adjust the discharge gap through force-sensing feedback, and by combining electrolyte vibration and cyclic replacement, it achieves the invention objective of high-precision electrochemical discharge machining of difficult-to-machine materials. In addition, this application also provides a method applied to the force-sensing-based electrolyte vibration electrochemical discharge machining device.

The invention relates to the field of product panning and material transportation, in particular to a tubular injection molding part panning system and a panning method. The disc loading system for the tubular injection molding parts comprises a discharging module, a multi-axis mechanical arm, a rotating platform, a tray discharging module, a tray feeding module, an auxiliary suction cup set, a pipe suction cup set, a pipe alignment recognition module and a main control module, and all the modules work cooperatively to achieve disc loading operation of the tubular injection molding parts. The invention further discloses a tray loading method applied to the system. The tray loading method comprises the steps of blanking detection, primary adsorption, visual alignment, line-by-line placement, full tray judgment, tray stacking, stacking and discharging and the like. The equipment achieves the technical effects that the tubular injection molding parts are automatically loaded and transferred, the influence of electrostatic attraction on the foam tray can be effectively reduced, and the loading efficiency and accuracy are improved.

The invention relates to an electrostatic wafer clamping device (400) comprising: - at least two electrodes (405, 410), connected to at least two phases (406, 411) of a control unit, configured to generate an electrostatic attraction force on the wafer; - the phases; and - a control unit (415) for dynamically controlling the electrical potential of each phase, configured to command, for each phase and for each electrode connected to that phase, the establishment of a stable electrical state selected from among: - a positive-polarity electrical potential state; - a negative-polarity electrical potential state; and - a neutral-polarity electrical potential state, the control unit being configured such that, during at least one stable state, at least one phase from among the set of phases is in the neutral-polarity electrical potential state while at least one other phase is in a positive- or negative-polarity electrical potential state.

The invention relates to a modified diaphragm for a zinc-iodine battery, the modified diaphragm comprises a diaphragm base material, and an aspartic acid metal chelate is adsorbed on one side, close to a battery positive electrode material, of the diaphragm base material; a zinc-loving composite functional material is arranged on one side, close to a battery negative electrode material, of the diaphragm base material, and one side of the zinc-loving composite functional material efficiently adsorbs polyiodide ions through a multi-network of electrostatic attraction, coordinate bonds and hydrogen bonds, so that the ion selectivity is improved, the shuttle effect of a polyiodide compound is effectively prevented, and the service life of the battery is prolonged. And the other side forms uniform electric field distribution and zinc flux on the surface of the negative electrode through the zinc-loving composite functional material, so that dendritic crystal growth is inhibited. In addition, the invention also provides a preparation method of the modified diaphragm for the zinc-iodine battery and the battery.

The invention belongs to the technical field of polyester recovery, and relates to a method for preparing BHET by catalyzing ethylene glycol alcoholysis of PET. According to the method, gamma-Fe2O3 (at) meso-SiO2-DBU is adopted as a catalyst, the gamma-Fe2O3 (at) meso-SiO2-DBU is composed of gamma-Fe2O3 (at) meso-SiO2 and DBU, the gamma-Fe2O3 (at) meso-SiO2 is of a core-shell structure, the core is gamma-Fe2O3, the shell is composed of meso-SiO2, the DBU and the shell form ion pairs through electrostatic attraction, and the ion pairs are enriched in mesopores of the meso-SiO2. The problem that the yield of BHET is low in an existing magnetic separation heterogeneous catalysis system is solved, the conversion rate of PET and the yield of BHET are effectively increased, and the catalyst is stable in structure and lasting in catalytic activity, can be magnetically separated and recycled and adapts to the strict reaction conditions for catalyzing ethylene glycol to depolymerize PET.

The invention discloses an ultrashort-chain perfluorinated compound trifluoromethanesulfonic acid selective electrode and a preparation method thereof. The sensing interface material based on an MXene confinement channel is designed and constructed by intercalating 4-trifluoromethyl benzyl ammonium bromide with multiple recognition sites between MXene layers. The sensing interface material realizes specific recognition and concentration-signal conversion of TFMS by utilizing fluorine-fluorine interaction, electrostatic attraction and pi-pi stacking synergistic effect generated between ammonium groups, benzene rings and trifluoromethyl of 4-trifluoromethyl benzyl ammonium bromide and TFMS molecules; the pre-enrichment capability of the TFMS at the interface is remarkably enhanced by utilizing the confinement effect between MXene layers, and the detection lower limit is greatly reduced. Experimental results show that when the sensor constructed by the trifluoromethanesulfonic acid selective electrode is used for detecting the TFMS, the sensor shows excellent selectivity, ultra-sensitive response and ultra-low detection limit identification, has quick response and high stability, and can realize real-time and sensitive detection of the TFMS in complex environmental water bodies and biological samples.