1017 results about "PTFE - Polytetrafluoroethylene" patented technology

The invention provides a light and heat-dissipating aerospace small-sized calibration lamp mounting seat, which relates to the technical field of aerospace optical small-sized calibration lamp structure fixation, and comprises a substrate mounting seat module, a conductive module, an insulating module and a heat conduction module. The conductive module comprises two chamfered semi-cylindrical conductive copper blocks and two wires with soldering lugs; the insulating module comprises an insulating polyimide isolating layer; the heat conduction module comprises a heat conduction insulation pad which is installed above two copper blocks, the positive electrode and the negative electrode of the two copper blocks are separated through an insulation polytetrafluoroethylene isolation layer, and the semi-cylindrical conductive copper blocks, the polytetrafluoroethylene isolation layer and the substrate installation base are positioned through pin holes. The soldering lug wire is installed on the left semi-cylindrical conductive copper block and the right semi-cylindrical conductive copper block in a pressing mode through top screws. The structure distribution is friendly, the anti-seismic performance is good, a good heat dissipation way is provided for the calibration lamp, and an effective and feasible implementation scheme is provided for fixing the small aerospace calibration lamp.

The invention discloses a high-performance ship cable and a preparation process thereof, relates to the technical field of cables, and aims to solve the problem that an existing cable is insufficient in environmental adaptability, safety, electromagnetic compatibility and the like, the cable comprises a conductor, an insulating layer, a longitudinal waterproof structure, a shielding layer and a sheath layer from inside to outside, the conductor is of a multi-strand soft copper wire stranded structure, and the copper content of the multi-strand soft copper wire stranded structure is larger than or equal to 99.95%; the DC resistance at 20 DEG C is less than or equal to 0.01724 omega mm / m; the insulating layer is made of cross-linked polyethylene or polytetrafluoroethylene and can resist 1.5 times of rated voltage for 1 minute without breakdown; the longitudinal waterproof structure comprises a water-blocking tape and water-blocking paste; the shielding layer is of a double-layer structure, and the shielding effectiveness is larger than or equal to 60 dB The sheath layer is made of a low-smoke halogen-free flame-retardant material and contains an antioxidant and an ultraviolet light absorber, the preparation process comprises six steps of conductor preparation, insulating layer forming and the like, parameters are accurately controlled, the cable can work at the temperature of-40 DEG C to 85 DEG C, is salt-fog-resistant, waterproof and flame-retardant, is adaptive to the complex environment of ships and warships, and the operation reliability and safety are improved.

The present application relates to the technical field of lead-acid battery electrode, aiming at the problem of thick lead paste on the existing lead-acid battery plate, large resistance during charging and poor rate discharge performance of the battery, a preparation method of lead-acid battery membrane electrode is disclosed, comprising the following steps: adding a binder to the prepared lead paste, rolling the lead paste containing the binder on the lead skin to form a lead paste film layer, immersing the lead skin and the attached lead paste film layer in a sulfuric acid solution, and solidifying and drying after taking out; the binder is polytetrafluoroethylene emulsion or a binder containing polytetrafluoroethylene emulsion. Unlike the high molecular film attached to the surface of the lead-acid battery plate in the prior art, the present application obtains a thin film electrode with thin thickness, uniform active material dispersion, large active material and current collector contact area and good conductivity, and has the advantages of large rate charge and discharge cycle.

The invention relates to the technical field of high polymer materials, and discloses a preparation method of high-dielectric-constant epoxy resin. The method comprises the following steps: (1) carrying out copolymerization reaction on bisphenol A epoxy resin and polytetrafluoroethylene at 80-100 DEG C for 2-3 hours; (2) adding a dicyandiamide curing agent into the reaction product obtained in the step (1), and carrying out gradient heating for curing; and (3) adding surface-modified barium titanate nanoparticles into the product obtained in the step (2), performing ultrasonic treatment, performing casting molding, and performing annealing treatment. According to the method, through molecular level design, the dielectric constant is remarkably improved while the excellent mechanical property of the epoxy resin is maintained, the dielectric loss (tan delta) and the thermal stability are optimized, and a high-performance base material is provided for electronic devices.

A method for producing modified polytetrafluoroethylene including: polymerizing tetrafluoroethylene and a modifying monomer in an aqueous medium in the presence of a polymer (I) containing a polymerization unit (I) based on a monomer represented by the following general formula (I) to obtain a modified polytetrafluoroethylene:wherein X1 and X3 are each independently F, Cl, H, or CF3; X2 is H, F, an alkyl group, or a fluorine-containing alkyl group; A0 is an anionic group; R is a linking group; Z1 and Z2 are each independently H, F, an alkyl group, or a fluorine-containing alkyl group; and m is an integer of 1 or more. Also disclosed is a composition containing the modified polytetrafluoroethylene and the polymer (I).

A novel sheath catheter is designed for broad applicability in intravascular percutaneous procedures, featuring a proximal hub, an elongate shaft, and a distal radiopaque marker band for enhanced visualization. The elongate shaft incorporates a tri-layer construction: a lubricious polytetrafluoroethylene (PTFE) inner polymer liner to minimize friction during device passage, a braided reinforcement skeleton for superior tensile strength and kink resistance, and a durable, wear-resistant outer jacket to withstand navigational stresses. This configuration yields a low-profile design with exceptional pushability, flexibility, and trackability, enabling access to small, tortuous vessels while maintaining structural integrity.

The invention discloses a short-process coagulation water purification treatment method and equipment based on a polytetrafluoroethylene membrane. The method relates to the technical field of short-process coagulation water purification treatment, and comprises the following steps: firstly, adding an agent into the electronic industrial wastewater to complete pretreatment, then filtering by adopting a polytetrafluoroethylene membrane to realize water purification, continuously collecting and analyzing short-process coagulation water purification data of the electronic industrial wastewater, and timely optimizing and adjusting a treatment scheme. Pollutants in a water body are converted into micro-flocs by adding a medicament, the micro-flocs are intercepted by a polytetrafluoroethylene membrane to remove the pollutants in the water body, a real-time monitoring sensor collects water quality data and membrane operation data, and a short-process coagulation quality quantized value and a purification accuracy quantized value are obtained through further analysis. Compared with a judgment value in a database, the method optimizes a medicament adding scheme and a membrane operation scheme, improves the process applicability, and solves the problems of insufficient accuracy and adaptability of a short-process water purification treatment method in the prior art.

The invention discloses a high-performance polyether-ether-ketone modified sealing material and a preparation method thereof, and relates to the technical field of sealing materials. The high-performance polyether-ether-ketone modified sealing material is prepared from the following raw materials in percentage by mass: 5 to 10 percent of polytetrafluoroethylene micro powder, 5 to 10 percent of graphene nanosheets, 10 to 15 percent of silicon carbide whiskers, 0.5 to 2 percent of silane coupling agent and the balance of polyether-ether-ketone, the preparation method of the high-performance polyether-ether-ketone modified sealing material comprises the following steps: mixing graphene nanosheets with a silane coupling agent, deionized water and absolute ethyl alcohol, carrying out ultrasonic dispersion for 2 hours, carrying out pretreatment to obtain a graphene nanosheet suspension, mixing the graphene nanosheet suspension with silicon carbide whiskers, polytetrafluoroethylene micro powder and polyether-ether-ketone, carrying out melt blending, and carrying out compression molding to obtain the high-performance polyether-ether-ketone modified sealing material. And cooling to obtain the high-performance polyether-ether-ketone modified sealing material.

The invention provides an ultrathin aramid nanofiber-based composite solid electrolyte and a preparation method and application thereof, and belongs to the technical field of polymer electrolytes and metal secondary batteries, the method comprises the following steps: adding LLZTO into anhydrous acetonitrile, stirring, then carrying out ultrasonic dispersion, then adding PEO and LiTFSI, carrying out constant-temperature stirring treatment, and then carrying out vacuum drying to obtain the ultrathin aramid nanofiber-based composite solid electrolyte. A mixed electrolyte solution is obtained; a porous aramid nanofiber aerogel film is soaked in the mixed electrolyte solution, and a soaked aramid nanofiber-based composite solid electrolyte is obtained; and placing the impregnated aramid nanofiber-based composite solid electrolyte on a polytetrafluoroethylene film, and carrying out vacuum drying and stripping to obtain the ultrathin aramid nanofiber-based composite solid electrolyte. The problems that an existing solid electrolyte is poor in mechanical property, low in ionic conductivity and unstable in electrochemical performance can be solved.

The invention relates to a low-temperature efficient heating air energy heat pump unit, discloses a low-temperature efficient heating air energy heat pump unit, and belongs to the technical field of heat pump air conditioners. The unit is composed of a compressor, an evaporator, a condenser, a throttling valve, a defrosting module, a refrigerant adjusting module and a control unit. The surfaces of fins of the evaporator are coated with polytetrafluoroethylene modified hydrophobic frost-resistant coatings, and the frosting amount can be inhibited by 60% or above; the defrosting module adopts a bypass coupling scheme of a 500-800W electric heating wire and a high-temperature refrigerant, and the defrosting time is less than or equal to 8min and is shortened by 30% compared with a traditional scheme; the refrigerant adjusting module dynamically adjusts the refrigerant temperature of an inlet of the evaporator through the bypass electromagnetic valve and the refrigerant mixing cavity, so that the compressor still maintains 100% of the rotating speed at-25 DEG C without frequency reduction, the COP is larger than or equal to 2.0, and the heating capacity is kept 75% or above of the normal temperature value. The system solves the industrial problems of frequent frosting, high defrosting energy consumption and large heating attenuation under the low-temperature and high-humidity working conditions, and can be widely applied to heating systems in household, commercial and high-humidity and low-temperature areas.

The invention discloses an ultraviolet-resistant and high-temperature-aging-resistant photovoltaic cable structure which comprises a cable conductor, and a buffer layer, an insulating layer, a shielding layer and a sheath layer which are sequentially arranged on the outer side of the cable conductor. The insulating layer is formed by co-extruding a heat-conducting buffer layer, a main insulating layer and a reflection isolating layer, and the heat-conducting buffer layer is provided with a heat-conducting channel along the axial direction; the shielding layer comprises a main body shielding layer and a thermal insulation layer. Silver-plated copper wires are embedded in the thermal insulation layer. Lotus-leaf-like bionic protrusions are arranged on the outer surface of the sheath layer, and a shape memory polymer film is embedded in the sheath layer. The cable conductor is made of high-purity oxygen-free copper and is spirally twisted, a ceramic composite coating is coated outside the cable conductor, and the buffer layer is a polytetrafluoroethylene film. According to the structure, through cooperation of multi-layer composite design and functional materials, the effects of rapid heat dissipation, improvement of temperature resistance and aging resistance, effective blocking of ultraviolet rays, enhancement of structural stability and the like are achieved, the problems that an existing photovoltaic cable is poor in weather resistance, insufficient in heat conduction and prone to structure failure are solved, and the photovoltaic cable can be widely applied to outdoor scenes such as photovoltaic power stations and the like.

The invention relates to the technical field of high-voltage circuit insulating materials, in particular to a flexible insulating sling for high-voltage operation and a preparation method of the flexible insulating sling. The flexible insulating sling for high-voltage operation sequentially comprises an aramid fiber layer and a polytetrafluoroethylene layer from inside to outside, flame-retardant microcapsules are loaded on the surface of the aramid fiber layer, a core material of each flame-retardant microcapsule is polyphosphate, and a shell material of each flame-retardant microcapsule is acrylic acid modified organic silicon resin. According to the application, the polytetrafluoroethylene and the aramid fiber are compounded to obtain the insulating sling, and the insulating sling is excellent in mechanical property, small in stress deformation, safe and reliable in load bearing, soft in texture, small in bending radius and capable of preventing a hoisted object from being scratched, and the breaking strength of the insulating sling reaches 20-30cN / dtex.

The invention relates to the technical field of electrolyte, in particular to a thioether cross-linked solid polymer electrolyte membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: taking N, N-dimethylformamide, respectively adding 3, 6-dioxa-1, 8-octane dithiol and triglycidyl isocyanurate, and uniformly stirring to obtain a mixed solution; adding bis (trifluoromethylsulfonyl) imide lithium into the mixed solution, putting magnetons on a magnetic stirrer, and completely dissolving the magnetons to obtain a precursor solution; and pouring a proper amount of the precursor solution into a polytetrafluoroethylene mold, spreading, and carrying out cross-linking polymerization in a blast oven to form the film. The three-dimensional thioether cross-linked network structure has a large number of weakly coordinated thioether groups, dissociation of lithium salt can be promoted, a large number of free Li < + > is generated, the number of Li < + > is increased, meanwhile, the crystallinity of a polymer is remarkably reduced, the ionic conductivity is improved, the mechanical stability of a film can be improved, and the service life of a battery is effectively prolonged.

The invention discloses fixed-point sampling equipment for underground water. The fixed-point sampling equipment comprises an equipment bracket, a control and display unit and an integrated underground detection assembly, the assembly integrates a sampling execution part, a visual positioning part and a lifting cleaning part, wherein the sampling execution part is a polytetrafluoroethylene Beller tube; the visual positioning part enables the optical axis of a lens of the waterproof camera and the axis of the Beller tube to be fixed in parallel through a rigid mounting bracket; the lifting cleaning part adopts an automatic telescopic cleaning line with a built-in cleaning flow channel, and a driving mechanism of the lifting cleaning part adopts non-lubrication magnetic coupling transmission. The control and display unit controls the lowering stroke of the cleaning line based on a picture returned by the camera, and accurate positioning sampling is achieved. Visual accurate sampling is achieved through rigid connection and synchronous lowering, and traditional blind sampling errors are overcome; and pollution-free materials, automatic cleaning and data integration functions are combined, so that pollution is avoided from the source, data integrity and traceability are guaranteed, and the normalization, accuracy and efficiency of underground water sampling are remarkably improved.

The invention provides a sulfide all-solid-state battery positive electrode membrane as well as a preparation method and application thereof, and relates to the technical field of solid-state batteries. Specifically, the method comprises the following steps: carrying out dry-process mixing on positive electrode component raw materials, and then carrying out hot rolling to obtain a positive electrode film; wherein the positive electrode component raw materials comprise a positive electrode active material, sulfide solid electrolyte, a conductive agent and polytetrafluoroethylene. According to the preparation method, the positive electrode film is prepared by taking polytetrafluoroethylene as a unique bonding component through the technological processes of dry mixing and hot rolling, so that the stress change caused by volume expansion of the positive electrode is effectively inhibited, and the positive electrode capacity is exerted under the load of a high electrode active material; and the preparation process is simple and easy to implement and low in cost, and has good generalizability and application prospects.

The invention discloses a method for purifying water by catalyzing ozonation through a nitrogen-fluorine co-doped carbon-loaded cobalt nanomaterial. Co-ZIF-8 and polytetrafluoroethylene (PTFE) are respectively used as a precursor and a fluorine source, and the nitrogen-fluorine co-doped carbon-loaded cobalt nano-catalyst is successfully prepared through an etching synchronous doping strategy. The composite material can be used for catalyzing ozone to degrade organic pollutants in water. Nitrogen doping can promote formation of a metal-nitrogen coordination structure, and decomposition of ozone on the surface of the catalyst is facilitated. Fluorine modification can significantly enhance the hydrophilicity of the composite material and accelerate the solid-liquid reaction of ozone in a solution and a catalyst interface, and the strong electron withdrawing effect of fluorine can effectively adjust the electronic structure of the catalyst and promote the generation of strong oxidizing active oxygen species, thereby achieving efficient and rapid removal of pollutants. The water treatment method solves the problem of low ozone utilization rate in a conventional catalytic ozonation process, has the advantages of high reaction rate and stable treatment effect, and has a good application prospect.

The invention discloses a high-flame-retardant temperature-resistant corrosion-resistant optical fiber composite cable and a preparation method thereof, and belongs to the technical field of cable manufacturing, and the high-flame-retardant temperature-resistant corrosion-resistant optical fiber composite cable sequentially comprises an optical fiber unit, a conductor layer, an insulating layer, a shielding layer, a corrosion-resistant layer and a sheath layer from inside to outside. The optical fiber unit adopts a ceramic silicone rubber buffer layer; the conductor layer is a nickel-plated copper alloy stranded wire, and the oxidation resistance is enhanced through nano titanium dioxide sol treatment; the insulating layer is of a three-layer co-extrusion structure; the shielding layer adopts an aluminum-plastic composite belt and tinned copper wire braided composite structure; the anti-corrosion layer is a polytetrafluoroethylene film subjected to plasma treatment; the sheath layer is made of two-component ceramic silicone rubber, is flexible after being vulcanized at normal temperature, and is converted into a ceramic body at high temperature. According to the optical fiber composite cable, through the collaborative design of a multi-layer structure, the performance of excellent continuous use stability, high salt mist environment corrosion resistance and the like is achieved, the optical fiber composite cable is suitable for high-temperature, corrosion, fire and other severe environments, and the safety and durability of the composite cable are remarkably improved.

The utility model discloses a getter film with high initial outbreak rate and lasting moisture absorption rate for a perovskite battery, a support framework layer is an expanded polytetrafluoroethylene microporous film layer, and an active layer is a getter active layer formed by infiltrating a getter into a pore structure of the expanded polytetrafluoroethylene microporous film layer. The composite layer is a getter composite layer formed on at least one side surface of the expanded polytetrafluoroethylene microporous membrane layer through a getter. Through the above mode, the periphery of the active material layer of the perovskite cell in a service environment can be kept in a vacuum state for a long time, and the perovskite cell is ensured to be in a high photoelectric conversion efficiency and a stable state for a long time; the getter film is coated with a back adhesive layer and is non-corrosive, and the getter film can be directly pasted on a glass cover plate of a perovskite cell or on silver, aluminum and copper electrodes for packaging after the release film is uncovered during use; and the initial explosion rate is high, and moisture and oxygen can be quickly absorbed in the packaging cavity within two hours, so that a vacuum state is achieved.

The invention discloses a negative-pressure-resistant enhanced PFA (Polyfluoroalkoxy) lining pipeline material and a manufacturing process thereof. The material comprises the following components in parts by weight: 100 parts of PFA resin, 1-10 parts of fluorinated nanofiller, 5-15 parts of perfluorinated sulfonic acid resin and 8-35 parts of an expanded polytetrafluoroethylene fiber skeleton. The material has a multi-scale reinforced structure: an expanded polytetrafluoroethylene skeleton is embedded into a PFA matrix to form a macroscopic reinforced structure, the perfluorinated sulfonic acid resin is attached to the surface of the skeleton to form an interface compatibilization layer, and the fluorinated nano filler is dispersed in the matrix to form a nano reinforced phase. The process comprises the steps of skeleton plasma activation and interface compatibilization treatment, nano filler and PFA melt blending, pressure forming, heat treatment and the like. The mechanical strength, creep resistance and negative pressure resistance of the PFA lining material are remarkably improved, and the PFA lining material is suitable for the fields of chemical engineering, pharmacy, semiconductors and the like.

The invention relates to the technical field of rehabilitation medical equipment, in particular to hand rehabilitation equipment and system based on multi-source data analys.The hand rehabilitation equipment comprises a wearable glove, the wearable glove is made of a flexible and breathable silica gel-fabric composite material and comprises finger parts and a palm part, and the finger parts correspond to five fingers of a human body one to one; each finger part is divided into three sectional mounting positions including a near section, a middle section and a far section in the length direction, and a polytetrafluoroethylene wear-resistant sleeve is pre-embedded in the wearable glove to serve as a traction rope channel; the flexible array type myoelectricity sensors are fixed to the mounting positions of the proximal section, the middle section and the distal section of each finger part, myoelectricity, postures, tension and interaction signals are comprehensively collected, weighted fusion is conducted through an attention mechanism, the motion intention recognition accuracy is larger than or equal to 92%, functional state evaluation is more accurate, and the motion intention recognition accuracy is larger than or equal to 92%. The training mode and parameters are dynamically adjusted according to the real-time state of the user, excessive / insufficient training is avoided, and the rehabilitation efficiency is improved.

The invention relates to a lithium manganese iron phosphate (LFMP) electrode material, an LFMP-solid electrolyte positive plate with a gradient structure design, a preparation method of the LFMP-solid electrolyte positive plate and an all-solid-state battery. The lithium manganese iron phosphate (LFMP) electrode material comprises a lithium manganese iron phosphate material, a composite binder and a solid electrolyte, the lithium manganese iron phosphate material comprises lithium manganese iron phosphate particles and a coating layer located on at least part of the surface of the lithium manganese iron phosphate, and the coating layer comprises lithium phosphate (Li3PO4); the composite binder comprises a polymer matrix and a conductive agent, the polymer matrix comprises polytetrafluoroethylene and a PEO / LiTFSI compound, and the PEO / LiTFSI compound is a compound composed of polyethylene oxide and lithium bis (trifluoromethylsulfonyl) imide. According to an electrode plate containing the lithium manganese iron phosphate (LFMP) electrode material, migration or dissolution of manganese ions is not prone to occurring in the charge-discharge cycle process, and the service life of a battery can be prolonged.

The invention relates to a high-insulativity tearable laminated gasket, a preparation method and application. Comprising at least two layers of stacked films which are bonded into a whole through an adhesive. Wherein the film is one of a polyimide film, a polyethylene film, a polyether-ether-ketone film or a polytetrafluoroethylene film; the adhesive comprises epoxy resin, a flexibilizer, an amine curing agent and a filler, through preparation of the high-insulativity tearable laminated gasket, the technical problems that in the prior art, an insulativity gasket needs to be used in the fields of electronics, electrics, aerospace and the like, and an existing gasket contains a metal layer or is high in dielectric constant and cannot meet the use requirement are solved.

The utility model discloses a heat -proof type aluminium alloy door and window, including glass and door frame, the glass includes polyester film, the top bonding of polyester film has polytetrafluoroethylene film layer, the top bonding of polytetrafluoroethylene film layer has EVA film layer, the back of door frame is fixedly installed with motor through support, the output fixed mounting of motor has screw rod, the positive surface screw mounting of screw rod has thread sleeve, and one end of the mutual approach of thread sleeve is fixedly installed with handle through support. The utility model discloses a heat -proof type aluminium alloy door and window, including glass and door frame, the glass includes polyester film, the top bonding of polyester film has polytetrafluoroethylene film layer, the top bonding of polytetrafluoroethylene film layer has EVA film layer, the back of door frame is fixedly installed with motor through support, the output fixed mounting of motor has screw rod, the positive surface screw mounting of screw rod has thread sleeve, and one end of the mutual approach of thread sleeve is fixedly installed with handle through support.

The invention discloses a preparation method of a self-cleaning antibacterial anti-mite fabric, and relates to the technical field of fabric preparation, and the preparation method comprises the following steps: 1-5 g of Cu (NO3) 2.6 H2O, 0.1-1.5 g of isophthalic acid, 20-50 mL of water and a certain antibacterial enzyme mixture are sequentially poured into a glass beaker, stirring is performed for 30 min, uniform mixing is performed, and the antibacterial anti-mite fabric is obtained; pouring the mixture into a 25mL polytetrafluoroethylene inner container, putting the inner container into a high-pressure kettle, sealing, carrying out high-temperature reaction for 72 hours in a drying oven at 90 DEG C, separating out a light blue product by using a centrifugal machine after the reaction is completed, washing for multiple times by using water, drying, mixing the obtained light blue powder with PET slices, melting and granulating, and drying to obtain the PET composite material. The preparation method comprises the following steps: preparing a bio-enzyme coated with a metal frame, mixing the bio-enzyme coated with the metal frame with common polyester chips, carrying out melt spinning to prepare multifunctional polyester fibers containing the bio-enzyme coated with the metal frame, taking the polyester fibers as weft yarns and cotton fibers as warp yarns, and interweaving into gray fabric according to a certain rule, so that the problem that the existing antibacterial anti-mite fabric is poor in effect durability is solved.

This application discloses a secondary battery and an electrical device, belonging to the field of battery technology. The negative electrode active material in the negative electrode film layer of the secondary battery provided by this application includes a negative electrode active material and a coating layer disposed on at least a portion of the surface of the negative electrode active material. The coating layer has a mesh structure containing polymer fibers, and an inorganic solid electrolyte is disposed in at least a portion of the pores of the mesh structure. Furthermore, the negative electrode binder includes polytetrafluoroethylene (PTFE). This effectively improves the initial coulombic efficiency and cycle performance of the secondary battery, and effectively reduces the self-discharge rate of the secondary battery.

The antenna module may include: an antenna board including a plurality of conductive layers and having an external hole formed to penetrate the plurality of conductive layers, the antenna board including a dielectric layer disposed between at least two conductive layers and having polytetrafluoroethylene; a plurality of radiation structures disposed on the antenna board; a plated through-hole formed to penetrate the dielectric layer and at least one of the plurality of conductive layers within the external hole and electrically connected to at least one of the plurality of radiation structures; and non-conductive ink disposed between the external hole and the plated through-hole. The thermal expansion coefficient of the non-conductive ink in the stacking direction of the plurality of conductive layers may be lower than the thermal expansion coefficient of polytetrafluoroethylene in the stacking direction of the plurality of conductive layers.

The invention discloses a multi-element binder for a dry-method electrode as well as a preparation method and application of the multi-element binder, and belongs to the field of lithium ion battery positive electrode materials. The multi-element binder comprises polytetrafluoroethylene and MAV, and the MAV is prepared from the following raw materials: sodium carboxymethyl cellulose, polyacrylic acid and polyvinylpyrrolidone. The preparation method comprises the following steps: (1) dissolving sodium carboxymethyl cellulose, polyacrylic acid and polyvinylpyrrolidone in water to obtain MAV, drying, and crushing into powder; and (2) mixing polytetrafluoroethylene with MAV to obtain the multi-element binder for the dry-method electrode. The multi-element binder provided by the invention can achieve the effects of strong adhesion, excellent conductivity and excellent stability.

The application relates to the development and technical field of electrocatalysts, and discloses a benzothiadiazole modified single-atom zirconium-doped metal copper electrode material and a preparation method and application thereof. The preparation method comprises the following steps: dissolving inorganic copper salt and inorganic zirconium salt, adding the inorganic copper salt and the inorganic zirconium salt into an alkaline solution, and performing hydrothermal reaction to obtain a single-atom zirconium-doped copper oxide precursor; dissolving benzothiadiazole, adding the benzothiadiazole into a dispersion solution of the single-atom zirconium-doped copper oxide precursor to obtain a mixed solution; spraying the mixed solution on a polytetrafluoroethylene film substrate loaded with copper nanoparticles to obtain a benzothiadiazole modified single-atom zirconium-doped copper oxide precursor electrode material; and performing electrochemical reduction treatment on the benzothiadiazole modified single-atom zirconium-doped copper oxide precursor electrode material to obtain a benzothiadiazole modified single-atom zirconium-doped metal copper electrode material. The electrode material is applied to an electro-reduction carbon dioxide reaction as a working electrode, exhibits excellent electro-reduction CO2 performance in an acidic environment, and realizes high-value-added C 2+ product with high selectivity.

An unhooking and weight throwing structure for a load-carrying unmanned aerial vehicle belongs to the technical field of unmanned aerial vehicle equipment and comprises a hook body, a main shell is fixedly mounted on the periphery, close to the bottom, of the hook body, and a load-carrying turning claw is movably mounted on the periphery, close to the bottom, of the hook body; according to the unmanned aerial vehicle, a remote data transmission receiver and an electric control system are integrated, a flying hand can trigger throwing through a remote controller anytime and anywhere within the range of 5-10 kilometers, and especially when the unmanned aerial vehicle has emergency situations such as electric quantity emergency and flight control faults, a load can be thrown immediately, and the unmanned aerial vehicle is convenient to use. The safety and survivability of the unmanned aerial vehicle platform are greatly improved, huge loss caused by crash of the whole vehicle is avoided, a polytetrafluoroethylene (PTFE) material layer is additionally arranged on the key contact face of the bearing turning claw and the self-locking limiting hook, and PTFE has the extremely low friction coefficient and the self-lubricating characteristic, so that it is ensured that even under the 3-ton ultimate load, the bearing turning claw can not be damaged, and the safety of the unmanned aerial vehicle platform is guaranteed. The unhooking action is still smooth, reliable and free of clamping stagnation.

A surgical instrument and associated method includes an end effector having an ultrasonic blade, a metallic jaw clamp, and a partially conductive tissue pad coupled to the jaw clamp. The tissue pad comprises a polymeric substrate with a conductive trace formed on the surface of the polymeric substrate. The polymeric substate may be formed from polytetrafluoroethylene (PTFE), and the surface of the PTFE substrate may be treated to improve adhesion of the conductive trace. The tissue pad is erodible during activation of the ultrasonic blade. The conductive trace may be a multilayer laminate. A method for constructing the surgical instrument includes forming the conductive trace on the surface of the polymeric substrate and securing the polymeric substrate to the metallic jaw clamp.