358 results about "Nano copper" patented technology

The invention relates to the technical field of conductive copper paste, in particular to conductive copper paste prepared by combining liquid nonferrous metal with graphene and a preparation method of the conductive copper paste. The preparation method comprises the following steps: weighing nano-copper coated graphene composite powder, a liquid nonferrous metal, a binder, trifluoropropyltrimethoxysilane, an auxiliary agent and copper powder, and then preparing trifluoropropyltrimethoxysilane into a dilute solution; copper powder and the nano-copper coated graphene composite powder are mixed to obtain composite powder; the liquid nonferrous metal and the composite powder are stirred to obtain metal paste; and adding a resin solution and an auxiliary agent into the metal paste to form printing paste, and then standing and curing. According to the conductive copper paste, the liquid nonferrous metal serves as a main binding phase, the defect that the welding thrust is low due to a traditional resin system is overcome, the problems of dispersion and interface compatibility are solved through cooperation of the nano-copper-coated graphene and the silane coupling agent, and finally the conductive copper paste with extremely low resistance, high stability and ultrahigh welding thrust is obtained.

The invention relates to the technical field of liquid absorption cores of vapor chambers, in particular to a vapor chamber with a porous liquid absorption core of a secondary structure and a preparation method of the vapor chamber. The preparation method comprises the following steps that an upper cover plate and a lower cover plate are prepared; cutting the metal wire mesh to obtain a wire mesh structure, and fixing the wire mesh structure on the surface of one side of the lower cover plate; electroplating is carried out on the silk screen structure of the lower cover plate to deposit nano-copper; calcining and curing the secondary structure of the silk screen electroplated with the nano-copper; and packaging the upper cover plate and the calcined lower cover plate, and performing liquid injection, degassing, sealing welding and packaging treatment to obtain the vapor chamber. According to the vapor chamber, the liquid absorption core with a secondary structure is prepared on the silk screen of the lower cover plate through electro-deposition of nano copper, the nano copper structure on the silk screen serves as the liquid absorption core through calcination and solidification, the service life of the vapor chamber can be effectively prolonged, the secondary porous structure provides multi-stage hole distribution for the liquid absorption core, multiple liquid flowing channels are provided, and heat conduction is accelerated.

The invention discloses a high-transparency PVB intermediate film and a production process and application thereof, and relates to the technical field of PVB intermediate films, the high-transparency PVB intermediate film comprises the following raw materials by weight: 100 parts of PVB resin, 20-30 parts of a composite plasticizer, 0.5-0.9 part of an LDH-based composite antioxidant, 0.5-1 part of an ultraviolet light absorber, 0.1-1.5 parts of nano lanthanum hexaboride, 0.1-1.5 parts of porous hollow nano copper sulphide, and 0.1-2 parts of nano TiO2 / SiO2 core-shell particles. The PVB intermediate film provided by the invention is relatively high in light transmittance, low in haze value, and excellent in oxidation resistance, weather resistance and mechanical strength.

The invention discloses a preparation method of graphene-coated aluminum oxide nanoparticles and a reinforced copper-based composite material thereof, and belongs to the field of metal-based composite materials, graphite flakes are stripped into graphene through a wet ball-milling one-step method, the graphene coats the surfaces of aluminum oxide particles, then the graphene is mixed with nano copper powder, and the mixture is formed through a powder metallurgy process; according to the method, the traditional multi-step process is simplified, and the composite material has high wear resistance and excellent functional characteristics by utilizing the lubricity and electric conductivity / thermal conductivity of graphene, and is suitable for the high-end fields of heat dissipation of electronic devices, sliding bearings and the like.

The invention discloses copper paste, an electrode and a preparation method and application of the electrode, the electrode comprises copper powder, the copper powder comprises nano-copper particles and flaky copper powder, the nano-copper particles comprise at least two connected copper nanoparticles, and the adjacent copper nanoparticles are connected in a surface contact mode. According to the electrode disclosed by the invention, the nano-copper particles formed by connecting more than two copper nano-particles are filled in the gap areas among the large-size flaky copper powder, so that the nano-copper particles are in direct contact with the flaky copper powder, conductive channels among the conductive particles are smoother, and the structure of the electrode is more compact due to the filling of the nano-copper particles; the bulk resistance of the electrode is greatly reduced and is equal to the conductivity of a silver electrode; the nano-copper particles can also be used as an auxiliary adhesive after being sintered and cured, so that the adhesive force between the copper grid line and the solar cell is improved, and the connection between the grid line and the solar cell is firmer.

The invention discloses a powder coating imitation copper wire drawing coating based on a gradient composite structure and a preparation method of the powder coating imitation copper wire drawing coating, and relates to the technical field of novel printing ink. The invention relates to a gradient composite structure-based powder coating copper-wire-drawing-imitating coating, which is characterized by comprising a bottom layer, a middle layer and a surface layer, wherein the bottom layer is an epoxy resin-based powder coating layer containing nano silicon dioxide; the middle layer is a copper-imitating ink wiredrawing layer containing micro-nano copper powder in directional arrangement; the surface layer is a water-based gloss oil layer containing a self-repairing flatting agent; wherein the bottom layer is formed by electrostatic spraying. Through the gradient composite structure design of the bottom layer, the middle layer and the surface layer, the coating provided by the invention shows remarkable advantages in the aspects of hardness (4H), salt fog resistance (more than 1000 hours), self-repairing property and the like, and overcomes the limitation that the traditional coating is insufficient in adhesive force and hard to consider both hardness and wear resistance.

The invention relates to the technical field of printed electronic materials, in particular to conductive copper ink for a printed circuit and a preparation method of the conductive copper ink. The conductive mica powder-graphene composite material comprises conductive mica powder, a nano-copper-graphene filler, flaky copper powder, spherical copper powder, an organic carrier, a dispersing agent, a coupling agent, an antioxidant and an auxiliary agent, a layer-point composite conductive structure is constructed through conductive mica powder and nano-copper-graphene filler, a close packing system is formed by combining particle size grading of copper powder with different morphologies, and the conductivity is guaranteed; by means of a chemical bonding interface formed by the coupling agent, the copper powder and the organic carrier, the integrity of the coating is enhanced, and stress cracking during welding is reduced; microencapsulated rosin in the auxiliary agent promotes wetting and spreading of the welding flux, titanate modified nano titanium dioxide constructs a three-dimensional cross-linked network to improve the bending resistance and thermal shock resistance of the coating, the falling phenomenon of components after welding is reduced, and the stability of the conductive copper ink in actual printed circuit production is improved.

The invention discloses a copper-clad plate material containing elastomer resin and a preparation method of the copper-clad plate material, and belongs to the technical field of new materials. The method comprises the following steps: mixing a styrene-butadiene-styrene block copolymer with polybutadiene rubber, adding nano-montmorillonite, and carrying out intercalation modification through hexadecyl trimethyl ammonium bromide to prepare nano-modified elastomer resin; the preparation method comprises the following steps: mixing polybutylene terephthalate with nano silicon dioxide, and carrying out surface modification by gamma-aminopropyltriethoxysilane and hexamethyldisilazane to obtain a resin matrix; mixing the two phases, adding citric acid, and carrying out microwave heating and high-shear dispersion to obtain a discrete material; carrying out hot pressing on the dispersion, adding polyurethane and polylactic acid, uniformly mixing, adding polydimethylsiloxane and sodium dodecyl benzene sulfonate, and curing to obtain a cured product; and coating the surface of the cured product with a nano-copper layer. The material has the characteristics of high peel strength, low dielectric loss, low water absorption and low thermal expansion, and is suitable for the field of high-speed low-loss copper-clad plates.

The present invention discloses a nano copper-based catalyst, its preparation method, and its application in the electrocatalytic reduction of carbon dioxide and carbon monoxide. Copper chloride (or copper nitrate, copper acetate) is dissolved in ultrapure water, and a sodium borohydride solution is added dropwise. Stir at room temperature for 5-60 min, filter, and dry to obtain a nano copper catalyst. Further, through a displacement reaction, nano copper-palladium and copper-silver catalysts are obtained. The present invention is applied to the electrocatalytic reduction of carbon monoxide. In a membrane electrode assembly (MEA) electrolyzer, the Faraday efficiency of multi-carbon products (C2+) reaches up to 95%, the partial current density reaches up to 3 A cm-2, and the overall electrolyzer energy efficiency reaches up to 39%. It can stably electrolyze for 30 hours at 1 A cm-2. This nano copper catalyst is applied to the electrocatalytic reduction of carbon dioxide. In an MEA electrolyzer, the Faraday efficiency of C2+ reaches up to 66%, and the partial current density reaches up to 331 mA cm-2.

The present invention belongs to the technical field of petrochemical catalysis, and relates to a preparation method for improving the stability of a Cu-Beta zeolite catalyst for preparing caprolactam from caprolactone, and the use thereof. In the present invention, a cavity-modified dealuminated Beta zeolite is used as a carrier, and copper is loaded in pore channels of the zeolite carrier by means of an improved ammonia distillation method. The cavity modification refers to subjecting the dealuminated Beta zeolite carrier to a desiliconization technique controlled by the use of a weak organic base so as to enlarge silanol nests generated by dealumination of the dealuminated Beta zeolite carrier, thereby better accommodating and stabilizing the nano and sub-nano copper particles. The core of the improved ammonia distillation method involves impregnating a zeolite carrier with an equal volume of a copper-ammonia complex solution, such that the copper-ammonia complex mainly undergoes, during ammonia distillation, a reaction of depositing copper hydroxide in zeolite pore channels, thereby improving the sintering resistance. The Cu-Beta catalyst prepared using the method provided by the present invention exhibits high activity, selectivity and stability when applied to the reaction of caprolactam prepared from caprolactone via gas-solid phase hydroamination.

The invention discloses superfine copper powder and a preparation method thereof, and relates to the technical field of copper powder preparation. The method comprises the following steps: preparing a copper-containing compound into a solution, and adding a pH regulator to obtain a system A; and adding an additive and a reducing agent to obtain a system B, reacting at 50-90 DEG C, filtering, washing and drying to obtain the superfine copper powder. The invention provides a low-temperature normal-pressure liquid-phase reduction preparation technology for the superfine copper powder, the method is simple, the cost is low, and the morphology and size of the micro-nano copper powder can be effectively controlled by adjusting the types, the content and the reaction conditions of all the reaction raw materials. The problems that in the prior art, the copper powder preparation process is complex, and the conductivity of a product is poor are solved.

The invention discloses a method for preparing nano copper powder based on a microwave-assisted reduction method and application. The method comprises the following steps: a) preparing a copper ion solution; b) adding a dispersing agent and a surfactant; c) adding a reducing agent; d) microwave heating reaction; e) separating and purifying a product; and f) drying. According to the method, directional reduction and morphology regulation and control of copper ions are achieved through the synergistic effect of a microwave field and chemical reduction, the specific surface area of the obtained product reaches 25-35 m < 2 > / g, the oxygen content is lower than 0.8 wt%, and excellent performance is shown in the fields of electronic packaging and conductive ink; the method has the characteristics of short reaction time (shortened by 90% compared with the traditional method), low energy consumption (less than 0.5 kWh / kg), no harmful by-product and the like, and meets the requirements of green chemical industrial production.

The invention belongs to the technical field of electronic materials, and particularly relates to a preparation method of a copper powder enhanced terahertz composite wave-absorbing film. The preparation method comprises the following steps: by taking polyurethane modified epoxy resin as a raw material, sequentially adding silane coupling agent modified aluminum oxide, chitin coated silicon dioxide and substituted thiophenol self-assembled nano-copper powder, stirring, then adding a curing agent and a dispersing agent to obtain a mixed solution, then pouring the mixed solution into a coating machine, and coating to obtain the coating. Preparing a copper powder enhanced terahertz composite wave-absorbing film; the minimum wave-absorbing efficiency of the thin film in the frequency band of 0.3-3.0 THz is-26.7 dB, and the effective bandwidth with the wave-absorbing efficiency smaller than-10 dB is the full frequency band; the composite wave-absorbing material can be used for wave-absorbing electromagnetic protection of 6G electronic devices.

The invention relates to the technical field of solar cells, and particularly discloses conductive paste for a solar cell, a preparation method of the conductive paste and an electrode. The conductive paste for the solar cell comprises the following components in percentage by weight: 88%-92% of carbon-based nano-copper particles, 4%-6% of glass powder and 4%-6% of an organic additive, the carbon-based nano-copper particles are prepared by reacting copper chloride with glucose and then calcining, the particle size is 52-100nm, and copper oxidation is inhibited by using a carbon layer; the organic additive is composed of a stabilizer, resin and an organic solvent according to a ratio of 1: 3: 9. The conductive material is prepared by mixing, dispersing, grinding and filtering, and can be prepared into a solar cell conductive material by silk-screen printing and high-temperature sintering. The conductive paste is low in cost, high in oxidation resistance and excellent in conductivity, and can replace silver paste to reduce the manufacturing cost of the solar cell, improve the performance and prolong the service life.

The invention discloses a graphene reinforced Al-Cu composite material and a preparation method and application thereof, and belongs to the technical field of metal matrix composite materials and preparation thereof. The problems that in an existing graphene reinforced aluminum matrix composite, graphene is poor in dispersity in an aluminum matrix, and harmful interface reaction is serious at the high temperature are solved. According to the preparation method, the surface of aluminum powder is plated with nano-copper particles through chemical plating, the potential of the aluminum powder in a water medium is regulated and controlled through a copper plating layer on the surface, the surface of the aluminum powder is provided with positive charges, graphene can be evenly dispersed in a matrix through electrostatic self-assembly, and meanwhile the surface copper plating layer is used for inhibiting interface reaction and hindering generation of a brittle phase. In addition, by adding the metal copper, the solid solution and second phase strengthening effects can be achieved, and the mechanical property of the composite material is further improved.

The invention provides a long-acting antibacterial self-cleaning hardening PET film and a preparation method thereof. The method comprises the following steps: S1, preparing a copper deposition nano zinc oxide antibacterial material, S2, preparing an antibacterial-hardening composite material which is modified silicon dioxide or porous aluminum oxide, and S3, preparing a hydrophobic and oleophobic self-cleaning antibacterial-hardening composite material. According to the antibacterial material, through the synergistic effect of the antibacterial property of nano-zinc oxide and the antibacterial property of nano-copper elementary substance, the antibacterial effect of the PET film is remarkably improved, and the antibacterial effect is long-acting and lasting; the modified porous silicon dioxide or porous aluminum oxide is a high-hardness compound, the hardness and the wear resistance of the PET film can be obviously improved, and the antibacterial material is loaded in holes of the hardening material, so that the antibacterial-hardening composite material has the antibacterial property and does not affect the hardness of the hardening material at the same time; due to the preparation of the hydrophobic and oleophobic self-cleaning material, the composite material has self-cleaning, long-acting antibacterial and hardening effects, and can meet the application requirements of a highly-functionalized PET film.

The present disclosure provides a high-temperature resistant nano-copper produced by laser direct writing, a preparation method and an application thereof. The high-temperature resistant nano-copper exhibits excellent oxidation resistance, thermal stability and superior conductivity. In this disclosure, the preparation is simple, and the nano-copper oxide ink can be stored for extended periods without being affected by oxidation. It is suitable for various manufacturing processes including printing, coating, and other similar methods. Moreover, based on laser direct writing, the processing efficiency is high, enabling the one-step integration of multi-performance of the high-temperature resistant nano-copper. The high-temperature resistant nano-copper described in the present disclosure can be used as an interconnection circuit in an integrated sensor system based on all-laser in-situ direct writing, and can be widely applied in fields of aerospace, automobile, electronics, etc.

The invention provides nanoscale superfine copper powder and a preparation method thereof, and belongs to the technical field of metal powder, the preparation method comprises the following steps: dispersing copper salt and a complexing agent in deionized water to obtain a copper salt solution; dispersing a reducing agent and a dispersing agent in deionized water to obtain a reducing solution; dispersing sodium hydroxide in deionized water to obtain a sodium hydroxide solution; the method comprises the following steps: heating a copper salt solution, a reduction solution and a sodium hydroxide solution to 45-80 DEG C, adding the reduction solution into the copper salt solution under a stirring condition, then adding the sodium hydroxide solution to obtain a mixed solution, and reacting for 2-3 hours; and after the reaction is finished, a suspension containing copper powder is obtained, and after solid-liquid separation, washing and drying are conducted, the nanoscale superfine copper powder is obtained. The method is simple in technological process, does not need special equipment and is suitable for industrial production. And the prepared nano copper powder is good in dispersing performance, uniform in particle size distribution, high in purity and suitable for being applied to the field of microelectronic components.

The invention relates to a cellulose membrane-based fluorescence colorimetric sensor based on nano-copper and MOF (Metal Organic Framework), a preparation method of the cellulose membrane-based fluorescence colorimetric sensor and application of the cellulose membrane-based fluorescence colorimetric sensor in tetracycline detection The sensor comprises a cellulose membrane, nano-copper clusters and MOF-5, the nano-copper clusters are fixed on the surface of the porous cellulose membrane through hydrogen bonds to form CCM, and then the MOF-5 is further loaded on the surface of the cellulose membrane to obtain the CCMM. When tetracycline exists in a sample to be detected, Zn (II) in the sensor and tetracycline form a luminous complex, so that the color of the trigger fluorescence is changed from orange red to green. The sensor provided by the invention has the advantages of high sensitivity (the detection limit is 0.5 mu M), quick response (qualitative treatment within 5 seconds), excellent selectivity (resistance to influences of various metal ions and interferents), good long-term stability (the performance is not changed after the sensor is stored for 60 days) and the like, and can be used for carrying out real-time visual detection on TC in drinking water, environmental water, milk and other samples.

The invention discloses a marine antifouling and anticorrosive coating with copper ion controllable release and self-repairing functions and a preparation method of the marine antifouling and anticorrosive coating, and belongs to the technical field of marine equipment antifouling and anticorrosive coatings. In order to solve the problems that a traditional copper-based antifouling coating is too fast in initial release of copper ions, poor in antifouling persistence, easy to damage and difficult to give consideration to antifouling and self-repairing performance, the preparation method comprises the following steps: firstly, preparing a KH560 modified nano copper oxide / activated carbon antifouling agent; controllable release of copper ions is achieved through the adsorption effect of activated carbon and interface modification of KH560. Secondly, taking PTMG and TDI as raw materials, and introducing FDME and BMI to construct a self-repairing polyurethane matrix containing reversible covalent bonds and hydrogen bonds; finally, the antifouling agent is introduced into the self-repairing polyurethane matrix according to a specific proportion, and the composite coating is prepared. According to the invention, long-acting controllable release of copper ions and synergistic improvement of self-repairing and corrosion resistance of the coating are realized, and the coating is suitable for long-term protection of marine equipment.

The invention relates to lead-free glass-coated copper powder for an HJT photovoltaic cell, conductive copper paste and a preparation method of the lead-free glass-coated copper powder and the conductive copper paste, the glass-coated copper powder comprises nano-copper powder and a coating layer on the surface of the nano-copper powder, and the coating layer is composed of bismuthate glass. According to the preparation method, a sol-gel method is adopted, the bismuthate glass is coated on the nano copper powder, the glass and the copper powder form a core-shell structure, the glass can be molten into a liquid phase during sintering, the contact between the glass and the copper powder is more uniform, and the oxidation resistance of the copper powder is enhanced. The prepared glass-coated copper powder can effectively isolate the copper powder from being in contact with an external oxidizing agent, excellent anti-oxidation protection is provided, the rapid oxidation point of the copper powder is increased by 100-150 DEG C compared with the rapid oxidation point of the copper powder before coating, and the service life of the copper powder is prolonged; meanwhile, the conductive copper paste has high stability, high reliability, low cost and high conductivity, and meets the environmental protection requirement.

The invention discloses a production process and application of a piece of cleaning cloth capable of being torn off, nano silicon dioxide and a water-repellent additive are added in the preparation process, and the cleaning cloth has excellent waterproof and anti-pollution performance. Water drops are not easy to attach to the surface of the cloth, stains are not easy to permeate, the cloth can be kept in a cleaning state for a longer time, the service life of the cloth is greatly prolonged, the cleaning efficiency of the cloth is greatly improved, antibacterial components such as nano-silver and nano-copper are used in the preparation process of the cloth, the components can effectively inhibit growth of bacteria and fungi on the surface of the cloth, and the antibacterial effect is good. And the risk of bacterial cross contamination is reduced. The cleaning cloth subjected to antibacterial treatment can effectively prevent bacteria from breeding on the cloth, high cleaning efficiency is ensured, and the cleaning cloth is particularly suitable for occasions with high sanitary requirements such as medical treatment and food processing.

The invention provides a catalytic viscosity reduction system for improving interfacial tension of super-heavy oil and a preparation method of the catalytic viscosity reduction system. The viscosity reduction system comprises the following components in parts by weight: 0.5-1 part of a poly-surfactant, 0.5-2 parts of a nano-copper catalytic system, 0.5-1 part of fatty alcohol-polyoxyethylene ether, 0.2-0.4 part of polyethylene glycol, 0.1-0.5 part of a modified nano-surfactant and 100 parts of water. On one hand, emulsification viscosity reduction is achieved through the synergistic effect of the poly-surfactant and the fatty alcohol-polyoxyethylene ether, and on the other hand, metal catalytic cracking viscosity reduction is conducted through the nano-copper catalytic system, so that the viscosity of the thickened oil is greatly reduced, the thickened oil has the high viscosity reduction rate at the low temperature and the high temperature, and the viscosity reduction rate is 96% or above according to indoor evaluation. The interfacial tension is reduced by compounding the nonionic surfactant fatty alcohol-polyoxyethylene ether and ethylene glycol, and the oil-water interfacial tension can be reduced to 10 <-2 > mN / m or below through the synergistic effect of the surfactant and the modified nano-surfactant, so that oil-in-water emulsion is favorably formed, the viscosity reduction effect is improved, and the fluidity of crude oil is improved.

The invention discloses a double-gradient nano-copper current collector and a preparation method and application thereof, and belongs to the technical field of electrode materials. The preparation method provided by the invention comprises the following steps: sequentially carrying out annealing treatment and cleaning treatment on electrolytic copper foil; the upper surface and the lower surface of the cleaned electrolytic copper foil are respectively subjected to surface ultrasonic rolling treatment, and the double-gradient nano-copper current collector with a structure of a nano-crystal layer, an ultra-fine crystal layer, a micro-crystal layer, an ultra-fine crystal layer and a nano-crystal layer is obtained by regulating and controlling parameters in the surface ultrasonic rolling treatment process. And the total thickness of the nanocrystalline layer and the ultra-fine grain layer is 20-50% of the thickness of the double-gradient nano-copper current collector. The tensile strength of the prepared double-gradient nano-copper current collector can reach 600 MPa or above, the elongation rate can reach 10% or above, oxidation and discoloration do not exist even if the current collector is subjected to heat preservation for 30 min in the high-temperature air environment of 200 DEG C, and good high-temperature stability is achieved.

The invention discloses a method for preparing micro-nano copper oxide powder through a microwave method and application of the micro-nano copper oxide powder. The method comprises the following steps: a) preparing a copper ion solution; b) adding a dispersing agent and a surfactant; c) adding urea; d) microwave heating reaction; e) separating and purifying a product; and f) drying and calcining. According to the preparation method, the rapid heating characteristic of microwave radiation is utilized, the effect of urea is combined, dispersing agents such as polyvinylpyrrolidone (PVP) and the like and surface active agents are added into a solution containing copper ions, the copper oxide nano-particles with the particle size distribution being 50-100 nanometers and even being controllable to be in the micron order are prepared, and the copper oxide nano-particles have good crystal structures and dispersity; the method is simple in process, high in reaction speed and low in energy consumption, and the obtained copper oxide nano particles can be used for preparing high-performance and high-purity copper oxide nano materials and have wide application prospects.

The present invention relates to the technical field of nanowire electromagnetic shielding film preparation, and discloses a composite nanowire staggered interconnected electromagnetic shielding film and a preparation process. The S coordinating atoms in a cationic coordination monomer form Cu-S coordination bonds with nano-copper wires, which are adsorbed on the surface of the nano-copper wires to obtain positively charged copper nanowires. The S coordinating atoms in an anionic coordination monomer form Ag-S coordination bonds with nano-silver wires, which are adsorbed on the surface of the nano-silver wires to obtain negatively charged silver nanowires. The amount of positively charged substances on the copper nanowires is greater than the amount of negatively charged substances on the silver nanowires. The silver nanowires and nano-copper wires are electrostatically self-assembled by electrostatic adsorption force to obtain positively charged silver-copper composite nanowires with a staggered interconnected distribution. The silver nanowires are spontaneously deposited on a negatively charged flexible substrate under the action of electrostatic adsorption to obtain a composite nanowire staggered interconnected electromagnetic shielding film. The electromagnetic shielding film exhibits excellent photoelectric properties.

The invention relates to an additive for improving refrigeration efficiency of liquid water and a production process thereof, and belongs to the technical field of water additives. The additive comprises 70-80 parts by weight of a carrier, 3-6 parts by weight of modified sophorolipid, 1-2 parts by weight of sodium polyacrylate and 0.5-1.5 parts by weight of sodium molybdate, the carrier is of a core-shell structure, the core of the carrier is nano-copper, and the shell of the carrier is hydrophilic mesoporous silica doped with carboxylated carbon nanotubes; according to the additive prepared by the invention, the refrigeration efficiency of water is improved through the interaction among the carrier, the surfactant and liquid water.

The invention discloses a nano-copper-zinc bimetal organic framework, a nano-drug material, a preparation method and application. The structural formula of the nano-copper-zinc bimetal organic framework is shown in the specification. According to the nano copper-zinc bimetal organic framework disclosed by the invention, through the synergistic effect of two metal ions, the structural stability and biocompatibility of a material can be optimized, and the material is endowed with multiple biological functions; the method is suitable for preparing nano-drug materials.

The present invention discloses a PVA-nano copper composite material, its preparation method and application, which relate to the detection of amino anthraquinone drugs. The method comprises the following steps: 1) Citric acid and histidine are uniformly mixed in proportion, deionized water is added and dissolved by ultrasonic to obtain a reaction solution, and the reaction is carried out at an oven temperature of 150-250 °C for 3-6 h to obtain histidine-functionalized graphene quantum dots; 2) Weigh PVA and add it to deionized water, stir and boil until completely dissolved to prepare a PVA solution; add the histidine-functionalized graphene quantum dots to the PVA solution; adjust the pH to neutral with NaOH, and dropwise add a copper chloride solution under stirring; stir for 80-120 min, add 3% borax to make the mixture into a gel, and freeze-dry; 3) The freeze-dried gel is calcined in an inert gas atmosphere to obtain a PVA-nano copper composite material. The PVA-nano copper composite material is used for detecting amino anthraquinone, and the detection limit is as low as 3×10<supgt;−9< / supgt; mol / L, with high sensitivity.

The invention discloses an antistatic teflon sleeve and a preparation method thereof. The antistatic teflon sleeve is prepared from the following components in parts by weight: 80-95 parts of teflon resin, 5-20 parts of a core-shell structure conductive filler, 1-3 parts of a compatilizer, 0.5-2 parts of a flexibilizer and 0.1-0.5 part of an antioxidant. The outer protective layer is prepared from the following components in parts by weight: 70 to 85 parts of ethylene-tetrafluoroethylene copolymer, 5 to 15 parts of modified nano silicon dioxide, 5 to 10 parts of fluororubber, 1 to 3 parts of antistatic aid and 0.1 to 0.5 part of ultraviolet absorbent. Through the design of the core-shell structure conductive filler, the core layer nano copper powder provides high conductivity, the shell layer PVDF has good compatibility with the Teflon base material, the surface modification layer further enhances the interface bonding force, the volume resistivity of the inner layer base material is reduced, and the antistatic requirement is met; the conductive filler is uniformly dispersed in the base material instead of a surface coating, so that the antistatic performance failure caused by friction or bending is avoided, and the antistatic performance is lasting and stable.