547 results about "Silver particles" patented technology

The invention relates to the field of optical lens coatings, and particularly discloses a preparation method of an antifouling and antibacterial spectacle lens coating. The preparation method of the antifouling and antibacterial spectacle lens coating comprises the following steps: depositing a silicon dioxide substrate on the surface of a lens through plasma enhanced chemical vapor deposition treatment; the preparation method comprises the following steps: dispersing nano-graphene and nano-silver particles in an ethanol solvent, adding a silane coupling agent to form a homogeneous suspension, loading the suspension on the surface of a silicon dioxide substrate through a spin-coating method, and carrying out heat treatment curing to form an antibacterial layer, with the loading amount of nano-silver being less than or equal to 0.5 wt%; and etching the surface of the antibacterial layer by adopting a reactive ion etching method, and then grafting perfluorooctyltriethoxysilane on the etched surface at 80-100 DEG C by adopting a vapor deposition method to form the hydrophobic layer. The preparation method of the antifouling and antibacterial spectacle lens coating has the advantages of being antibacterial, antifouling and high in durability.

Composite materials with noble metal coated silver nanowires loaded into polymer are described. The composite materials may have resistivities of no more than about 100 Ohm-cm, or from about 100 Ohm-cm to about 1×1011 Ohm-cm depending on the amount of noble metal coated silver nanowires loaded into the polymer. The noble metal coated silver nanowires may be platinum coated silver nanowires. Metal particulates such as silver flakes or silver particles may be added to the composite materials in order to obtain desired properties. Composite precursor compositions and methods for preparing the composite materials are described.

The invention provides high-filling silver powder and a preparation method thereof, and belongs to the field of metal powder.The preparation method comprises the steps that a nano-silver solution is prepared, a dispersing agent and a first reducing agent are mixed to obtain a mixed solution, the nano-silver solution and the mixed solution are mixed in a constant-temperature stirring state to obtain a base solution, a second reducing agent solution and a silver nitrate solution are prepared respectively, and the high-filling silver powder is prepared. And under the constant-temperature stirring state, the second reducing agent solution and the silver nitrate solution are synchronously added into the base solution, a silver powder solution is obtained through reaction, the silver powder solution is subjected to washing, solid-liquid separation, drying and depolymerization shaping treatment, and the high-filling silver powder is obtained. Controllable preparation of the large-size sphericity silver powder is achieved by controlling the particle size and the adding amount of the nano-silver, regulating and controlling heterogeneous nucleation and growth sites of silver ions and inhibiting formation of multistage dendritic crystals, surface charges and steric hindrance effects of silver particles are optimized through the surface adsorption effect of the dispersing agent, the agglomeration phenomenon of the silver powder in the growth process is reduced, and the silver powder is prepared. And meanwhile, the silver powder is endowed with excellent flowability.

The invention provides application of a silver-bismuth tungstate catalyst in preparation of methanol from light-driven CO2, and belongs to the technical field of CO2 conversion and reduction. Bismuth tungstate nanosheets, silver salt and water are mixed, the size of silver particles is controlled by adjusting the pH value, the silver-bismuth tungstate catalyst is obtained, and the size of the silver particles is 20-50 nm; silver is evenly distributed on the surface of bismuth tungstate, the obtained silver-bismuth tungstate catalyst is large in specific surface area and high in light response capacity, the silver-bismuth tungstate catalyst can generate a large number of high-energy hot electrons during illumination, in-situ photo-thermal conversion is achieved, no external heat source is needed for heat supply, the photo-thermal effect is enhanced, CO2 conversion is promoted, and the methanol yield is increased.

The invention relates to the field of solder materials, and provides a non-ferrous metal solder for low-temperature brazing and application, the solder is composed of carbon-coated copper nanorods, tin-bismuth alloy-coated silver nanoparticles, 2-mercaptobenzimidazole, rosin resin, an organic active agent, a dispersing agent, ionic liquid, hydroxyethyl cellulose, indium nitrate and citric acid. The silver particles are of a core-shell structure and are coated with tin-bismuth alloy layers, and continuous carbon layers are formed on the surfaces of the copper nanorods, so that the conductivity and the interface stability of the solder are effectively improved. The non-ferrous metal solder with excellent conductivity, low melting point and good wettability is prepared through step-by-step mixing, hot press molding and low-temperature heat treatment processes, and is suitable for electronic device packaging, power device connection and flexible circuit interconnection, and the defects of existing solder in the aspects of low-temperature welding and high conductivity are overcome.

The invention discloses composite silver powder with a surface nano-coating structure and a preparation method of the composite silver powder. The composite silver powder comprises a micron-sized spherical silver powder core and a nano-silver shell layer coating the surface of the core, and the nano-silver shell layer comprises nano-silver particles making contact with one another; the D50 particle size of the core body is 1-2 microns, and the particle size D50 of the nano-silver particles is 10-100 nm; the composite spherical silver powder with micron-sized silver coated with nano-silver is prepared through a liquid phase chemical reduction method, the D50 particle size of the composite spherical silver powder is 1.67-1.70 microns, the tap density can reach 5.94 g / cm < 3 >, the specific surface area can reach 0.47 m < 2 > / g, and compared with micron-sized spherical silver powder of a single structure, the conductive performance of the silver powder can be improved by 32%, and the sintering activity is higher.

The invention discloses a silver particle modified and carbon coated lithium manganese iron phosphate positive electrode material and a preparation method thereof, and relates to the technical field of materials.The preparation method comprises the steps that a lithium source, an iron source, a manganese source and a phosphorus source are mixed and dissolved, and a mixed solution is obtained; adding a silver ion solution into the mixed solution, and carrying out a first hydrothermal reaction to obtain a reaction solution; mixing the reaction liquid with a carbon source and a reducing agent, carrying out a second hydrothermal reaction, and separating a solid phase to obtain a precursor; and sintering the precursor to obtain the lithium iron manganese phosphate positive electrode material. In the hydrothermal reaction stage, silver ions can inhibit rapid growth of high-energy crystal faces, and finally more high-energy crystal faces are exposed. And in the sintering stage, silver ions are reduced into simple substances to modify the carbon layer, a carbon-metal composite conductive network is formed, and the conductivity of the carbon layer is improved. The preparation method is simple and convenient to operate, can quickly and efficiently form the nanoscale lithium manganese iron phosphate positive electrode material with relatively good electrical properties and [001] crystal face orientation, and has a relatively good application prospect.

The invention discloses a preparation method of a wear-resistant magnetic composite nano ferroferric oxide material, and belongs to the technical field of nano ferroferric oxide materials.The preparation method comprises the steps that coated modified ferroferric oxide composite powder, silver nitrate and absolute methanol are added into a reaction kettle, stirring and ultrasonic dispersion are conducted, then 2-aminoterephthalic acid is added, stirring and mixing are conducted, and a mixture is obtained; and after the reaction, separating to obtain the wear-resistant magnetic composite nano ferroferric oxide material. The wear-resistant magnetic composite nano ferroferric oxide material prepared by the preparation method disclosed by the invention overcomes the problem that an existing ferrite material is relatively single in electromagnetic loss mechanism in the aspect of nickel-phosphorus plated fabric, and the electromagnetic shielding effectiveness of the fabric is improved; the coated modified ferroferric oxide composite powder has good dispersity, a polydopamine coating layer on the surface of the coated modified ferroferric oxide composite powder improves the anchoring effect on silver MOF particles through a mussel-like adhesion interface, meanwhile, stress is dispersed and crack propagation is reduced through the buffering effect of the polydopamine coating layer, and the mechanical stability of the wear-resistant magnetic composite nano ferroferric oxide material is improved.

The invention provides a composite material solar interface evaporation device and a preparation method and application thereof. The solar interface evaporation device comprises a photo-thermal layer and a supporting layer, and a plurality of fluid transportation channels are formed in the supporting layer. The photo-thermal layer combines the carbon nano tube and the silver particles to generate an efficient photo-thermal conversion film, so that the photo-thermal conversion efficiency is improved; pVA is adopted as a curing film-forming agent, a PVA aqueous solution is firstly sprayed on the surface of the supporting layer through a laminated spraying method, then the photo-thermal layer is sprayed on the surface of the PVA film layer, and the photo-thermal layer is prevented from being stripped from the supporting layer; the supporting layer is of a hollow conical supporting structure prepared from PA12 through the selective laser sintering (SLS) 3D printing technology, and a capillary triangular tooth-shaped groove is designed to serve as a fluid conveying channel. The evaporation device achieves efficient photo-thermal energy utilization, high seawater evaporation rate and biological pollution resistance, has the advantages of being low in preparation cost, long in service life, environmentally friendly and the like, and has wide application prospects in the fields of seawater desalination and sewage treatment.

The invention belongs to the technical field of batteries, and particularly relates to a preparation method of coating slurry, a silver-carbon negative electrode plate, a preparation method of the silver-carbon negative electrode plate and a solid-state battery. Compared with the prior art, by controlling the agglomeration degree of the silver material in the negative electrode active coating, silver and carbon particles can be uniformly dispersed, and on the basis of avoiding the generation of lithium dendrites, attachment sites and spaces of the silver particles on the carbon particles are increased, so that the safety performance and the electrical performance of the battery are improved.

The invention relates to the technical field of micro-nano particle preparation, and discloses particle size controllable micro-nano silver powder and a preparation method thereof.The preparation method comprises the steps that S1, micron-sized silver cores and nano-sized silver particles are prepared; s2, performing surface activation on the micron-sized silver core; s3, filling pore gaps of a porous template with the micron-sized silver cores; s4, spraying graphene dispersion liquid on the porous template, and forming graphene network coverage on the surface of each silver core; and S5, after the porous template is removed, nanoscale silver particles are deposited on the surface of the exposed silver core, and a silver shell structure wrapping the silver core and the graphene network is formed. Through gradient compounding of a micron silver core-graphene network-nano silver shell structure, the width difference between two sintering necks formed between the circuit board and connecting plate interfaces on the two sides during sintering is reduced by effectively utilizing the wettability of a nano silver shell and the stress dispersity of graphene, and meanwhile the excellent electrical conductivity and thermal conductivity of the material are utilized; and the sintering performance of the circuit board is optimized.

The invention discloses a preparation method of an integrated collector plate for a vanadium battery. The preparation method comprises the following steps: preparing foamed nickel deposited by carbon nanotubes; pressing the conductive particles into sheets, sequentially putting the conductive sheets, the modified foamed nickel and the conductive sheets into a mold, and integrally forming by using a hot press to obtain the composite bipolar plate. Silver-copper composite powder is prepared by plating silver on the surface of copper powder through chemical plating, conductive adhesive containing silver-copper metal powder is prepared, and a copper plate and a composite bipolar plate are bonded through the conductive adhesive to prepare the integrated collector plate. The foamed nickel is used as a framework material, the interface between the foamed nickel and the carbon composite layer is improved by depositing the carbon nanotubes on the surface of the foamed nickel, the mechanical strength and the conductivity of the composite bipolar plate are improved, nano-scale silver particles on the surface of the copper powder can be melted by performing heat treatment on the silver-copper composite powder, a continuous silver film is formed, and the conductivity of the composite bipolar plate is improved. The conductivity and oxidation resistance of the conductive adhesive are improved, and the contact resistance between the bipolar plate and a copper plate is reduced, so that the performance of the flow battery is improved.

The present application relates to the technical field of bacteriostatic impregnated paper preparation, and discloses a bacteriostatic impregnated paper and a preparation method thereof, wherein a melamine impregnated paper substrate is impregnated with an impregnating solution; a rate regulating coating is coated on the surface of the substrate, so that the release rate of the bacteriostatic component is regulated according to the change of environmental pH value; wherein the surface of the rate regulating coating is further coated with a nano-silver particle layer, and the components of the impregnating solution include the following raw materials in percentage by weight: tea tree oil 0.5-2%, cinnamaldehyde 1-3%, lemon essential oil 0.5-1%, ethanol 70-80% and water; the present application provides a multi-layer protection mechanism, which can not only effectively kill various bacteria and fungi, but also prolong the duration of the bacteriostatic effect; the presence of the nano-silver particle layer enhances the long-term bacteriostatic effect, and even after long-term use, the high-efficiency antibacterial performance can be maintained; the introduction of the pH-sensitive polymer coating enables the release rate of the bacteriostatic component to be automatically regulated according to the change of environmental pH value.

The invention provides a perovskite solar cell, a preparation method thereof and a photovoltaic module, and the perovskite solar cell comprises a substrate, a first carrier transmission layer, a perovskite absorption layer, a second carrier transmission layer and an electrode layer which are sequentially stacked. And a nano-silver particle layer is arranged between the first carrier transport layer and the perovskite absorption layer. According to the invention, the nano-silver particle layer is used as a crystal nucleus, so that the crystallization of the perovskite absorption layer is promoted, and the high-quality perovskite thin film with large grain size and low defect density is formed; in addition, the particle surface of the nano-silver particle layer can reflect sunlight, a light trapping structure is formed, and the utilization rate of light can be remarkably improved. In conclusion, the photoelectric property of the perovskite solar cell can be effectively improved, and the perovskite solar cell has a wide application prospect.

The invention provides a preparation method of silver-coated copper powder, and belongs to the technical field of metal powder treatment. The used copper particle suspension contains a complexing agent, so that the activity of the copper particles can be reduced, the reaction rate of reduction coating can be reduced when a silver-ammonia complexing solution is added, and a compact silver layer slowly and uniformly grows on the surface of each copper particle; the reduction of the activity of the copper particles slows down the replacement reaction of silver ions and copper, and the situation that the coating surface is rough and loose due to the generation of overlarge silver particles is avoided; the silver grows slowly and compactly, so that the surface of the coated silver layer is smooth and compact on the basis of lower usage amount of the silver source; the preparation method is simple in process, low in silver content and low in production cost, and the coated silver layer is smooth and compact in surface.

The present invention discloses a method for preparing silver powder and a nanostructure on the surface of the silver powder. The preparation method comprises the following steps: (1) mixing micron silver powder, a nanosilver seed solution, an organic solvent, and a binder to form a mixture solution; preparing a complex silver ion solution and a reducing agent solution; wherein the binder is an organic acid containing a carbon-oxygen double bond and a hydroxyl group, and the complex silver ion solution is a silver ion solution containing a complexing agent, wherein the silver ions exist in a complexed state; (2) mixing the complex silver ion solution, the reducing agent solution, and the mixture solution to react, so that newly generated silver is formed on the surface of the micron silver powder and wraps the surface of the micron silver powder; (3) after the reaction is completed, separating and obtaining silver powder, washing, filtering, and drying to obtain a silver powder product. The present invention achieves a higher coverage rate of subsequent surface nanostructured silver powder by all-round coating of silver particles, thereby obtaining a silver powder product with high sintering activity.

The invention belongs to the technical field of microelectronic packaging, and particularly relates to low-temperature curing solder paste for microelectronic packaging and a preparation method of the low-temperature curing solder paste. The low-temperature curing solder paste for microelectronic packaging comprises the following components in percentage by mass: 85-90% of modified solder powder, 1-2% of modified nano-silver particles and 8-14% of soldering flux, the soldering powder comprises, by mass, 42% of Sn and 58% of Bi. The preparation method of the modified solder powder comprises the following steps: uniformly mixing an alcoholic solution containing solder powder, an amino-terminated silane coupling agent and an alcoholic solution of natural macromolecular organic acid, performing ultrasonic treatment, filtering after the ultrasonic treatment is finished, washing with a sodium humate solution, and drying, thereby obtaining the modified solder powder. By adopting the specific modified solder powder and the modified nano-silver particles and cooperating with the soldering flux, the obtained solder paste can be stored at normal temperature and has an excellent expansion rate.

The invention relates to the technical field of water purifiers, in particular to a filter element, a preparation method of the filter element and a water purifying device.The filter element comprises a silica sand layer, an activated carbon adsorption layer and a modified nano-silver functional layer which are stacked in the water flow direction; wherein the modified nano-silver functional layer comprises nano-silver particles modified by antibacterial peptide-cyclodextrin. According to the filter element prepared through the method, a superfine and dispersed nano-silver particle system is constructed, the stability of nano-silver in the filter element system can be greatly enhanced, then the antibacterial activity and antibacterial broad-spectrum performance of the nano-silver are improved, meanwhile, efficient removal of heavy metal is achieved in an auxiliary mode, and the water purification efficiency of a water purification device is effectively and comprehensively improved.

The invention relates to the technical field of nano-agent preparation, in particular to a nano-agent capable of promoting germination and resisting viruses, which comprises the following raw materials in percentage by weight: 0.0005-0.1% of carboxyl modified nano-selenium particles with the particle size of 10-100 nm, 0.0005-0.1% of nano-selenium powder with the particle size of 10-100 nm, and the balance of water. The content of the polyethyleneimine modified nano silver particles is 0.0001%-0.05%, and the particle size of the polyethyleneimine modified nano silver particles 0.01%-5% of a stabilizing agent, wherein the stabilizing agent is one or more of polyvinylpyrrolidone (PVP), trehalose or sodium citrate; 0.1%-5% of a pH regulator, wherein the pH regulator is a phosphate buffer solution; 1%-5% of a freeze-drying protective agent, wherein the freeze-drying protective agent is mannitol; and the balance of deionized water. Compared with nano-selenium and nano-silver, the nano-agent capable of promoting germination and resisting viruses and the preparation method of the nano-agent have the advantages that the effect of reducing the ToBRFV content and PSTVd content of tomato and pepper seeds can be better, the effect of promoting growth of tomato and pepper plants can be achieved, and growth of stems and roots can be promoted.

The application discloses a kind of high-conductivity MXene-based electromagnetic shielding composite films and preparation method thereof, belong to new material technical field.The preparation method includes the following steps: using in-situ HF etching method to prepare MXene dispersion liquid;With deionized water as solvent, silver nitrate solution is prepared by dissolving silver nitrate;The silver nitrate aqueous solution is added to MXene dispersion liquid, and Ag@MXene film is obtained by vacuum filtration method.The method uses silver ion in silver nitrate as oxidant to make it and titanium element in MXene occur redox reaction to generate silver particles, so as to prop up MXene sheet layer and reduce the resistance caused by adhesion between sheet layers and increase the conductive path in MXene, so as to increase the conductivity of MXene;The composite film not only has excellent conductivity, electromagnetic shielding performance and is easy to form processing;The conductivity of the composite film can reach 3120S / cm, and the electromagnetic shielding performance can reach 68.5dB.

The invention discloses a preparation method and application of novel heat pipe sintered core powder, and belongs to the technical field of heat conduction materials. The preparation method comprises the steps of pioneer nucleation site construction and island-shaped structure construction. Through the gradient coupling process of replacement-reduction synergistic reaction, it is ensured that silver particles form a coating effect on copper matrix particles in an island form, so that the sintering temperature is effectively reduced, meanwhile, the capillary performance of sintered core powder is improved, the adsorption capacity of the sintered core powder and the bonding strength of the sintered core powder and a copper pipe are improved, and the service life of the sintered core powder is prolonged. Therefore, the sintered core powder has more excellent adaptability in the process of sintering and manufacturing the heat pipe, further the processing performance of the sintered heat pipe is improved, and a good foundation is laid for the subsequent flattening and other thinning procedures of the heat pipe.

The invention relates to the field of textiles, and particularly discloses a preparation process of antibacterial fibers, which comprises the following steps: S1, respectively drying and preparing polymer slices and an antibacterial agent; s2, performing melt spinning on the polymer slices and an antibacterial agent, performing air cooling, and then performing traction and winding to obtain antibacterial fibers; wherein the antibacterial agent is prepared by mixing dodecyl trimethyl ammonium chloride, polyvinylpyrrolidone and core-shell type antibacterial particles according to the mass ratio of (0.4-0.5): (0.1-0.2): 1, the core-shell type antibacterial particles are prepared by loading nano-zinc oxide and nano-silver particles on intercalation modified montmorillonite and then forming a silicon dioxide coating layer through a sol-gel method, and the core-shell type antibacterial particles are prepared from the silicon dioxide coating layer through a sol-gel method. And carrying out spray drying to obtain the core-shell antibacterial particles. The preparation method has the characteristic of improving the antibacterial durability and uniformity of the antibacterial fiber.

The invention belongs to the field of bone repair materials, and particularly relates to a multifunctional biological composite scaffold for repairing supercritical bone defects and a preparation method of the multifunctional biological composite scaffold. Medical-grade poly-L-lactic acid (PLLA) is used as an organic phase, nano-hydroxyapatite (n-HA) is used as an inorganic phase, a high-toughness substrate is formed through composite precipitation, PLLA provides flexibility, n-HA (the calcium-phosphorus ratio is 1.67) enhances rigidity, and the two-phase mechanical property of the bionic bone is achieved; on the basis, nano-silver particles and rhizoma drynariae flavone drug-loaded hydrogel are newly added, and through multiple innovations such as nano-silver antibiosis, rhizoma drynariae flavone anti-inflammatory bone promotion, dynamic hydrogel drug sustained release and the like, a composite scaffold system with more comprehensive functions and more complex indications is constructed, the multi-dimensional repair requirement of supercritical bone defects is met, and the application prospect is broad. And the technical complexity and systematicness are obviously improved.

The invention discloses an antibacterial wood coating based on water-based macromolecule combination. The antibacterial wood coating comprises the following components: a water-based macromolecule matrix, nano-silver particles, nano-copper particles, nano-titanium dioxide, a propolis extract, a dispersing agent, a surfactant, an antioxidant, an organic silicon compound, an ultraviolet light absorber, sodium polyacrylate, a cross-linking agent and deionized water. According to the antibacterial wood coating based on water-based macromolecule combination, the technical problems of stability, antibacterial effect, environmental friendliness, multifunctionality and the like of the antibacterial wood coating are solved, and an efficient, lasting and environment-friendly solution is provided.

The invention discloses conductive silver paste doped with graphene powder and a preparation method of the conductive silver paste, and relates to the technical field of conductive silver paste. The method comprises the following steps: performing nitrogen doping on graphene by using plasma, introducing nitrogen atoms into graphene crystal lattices to form nitrogen-doped graphene, and introducing oxygen-containing functional groups on the surface of the graphene through a plasma surface modification technology to further improve the conductivity. The preparation method comprises the following steps: mixing an aniline monomer and an aminobenzoic acid monomer, carrying out in-situ polymerization on the surface of nitrogen-doped graphene to generate a polyaniline-aminobenzoic acid copolymer, and compounding a graphene-polyaniline material obtained by in-situ polymerization with carbon nanotubes to construct a three-dimensional conductive network. Secondly, the prepared three-dimensional filler is added into conductive silver paste, carboxyl in aminobenzoic acid is adsorbed and combined with silver particles through Van der Waals force, a stable interface structure is formed, the interface resistance is reduced, and the connectivity of a conductive network is enhanced. The prepared conductive silver paste has the effect of high conductivity.

The invention discloses an antibacterial breathable ES fiber and a preparation method thereof, and relates to the technical field of sanitary fibers. The preparation method comprises the following steps: firstly, preparing aldehyde chitosan; then, glutaraldehyde is used as a cross-linking agent, silicon dioxide and aldehyde chitosan are subjected to chemical cross-linking, nano-silver particles are added in the cross-linking process, the nano-silver particles are coated, then freeze drying is conducted, and composite aerogel is obtained; the composite aerogel has good compatibility with a core material PET (Polyethylene Terephthalate). Secondly, silver acetate and the carbon spheres are used for preparing hollow calcium carbonate microspheres doped with silver ions, then a silane coupling agent is used for conducting surface modification on the calcium carbonate microspheres, the porosity of a wrapping layer is increased through the hollow porous structure, and the air permeability of the ES fiber is improved; amino groups on the surfaces of the modified calcium carbonate microspheres can be combined with aldehyde groups of aldehyde chitosan to generate Schiff base; and the generated Schiff base and the metal silver of the skin-core layer take effect synergistically from chemical and physical aspects to achieve the purpose of high-efficiency antibiosis. The ES fiber prepared by the invention has antibacterial and breathable effects.

The invention provides base metal main grid slurry, a preparation method thereof and a photovoltaic cell. The base metal main grid slurry comprises 3-8 parts by mass of nickel powder, and the surface of the nickel powder is coated with a modified component; 0.5-1 part by mass of first glass powder; 0.5 to 1.5 parts by mass of second glass powder; 13-16 parts by mass of an organic phase; 0.2 to 0.5 part by mass of an organic auxiliary agent; 15-25 parts by mass of a first silver powder; and 45-60 parts by mass of a second silver powder. The base metal nickel is used for replacing part of silver powder, the wettability is improved through surface coating, meanwhile, glass elements are optimized, the glass softening point is reduced, the paste can be sintered at the low temperature, close combination of silver particles is facilitated, and the density and conductivity of a conducting layer are improved. According to the technical scheme, the sintering is compact, the conductivity is slightly higher than that of pure silver paste, and the effects that the efficiency is equal to that of the silver paste and the tension is slightly lower than that of the pure silver paste are achieved.

The invention relates to the technical field of electronic paste, and discloses wear-resistant environment-friendly conductive silver paste and a preparation method thereof.The preparation method comprises the following steps of silver powder pretreatment, environment-friendly resin system preparation, conductive reinforced phase modification, paste compounding and curing treatment; according to the preparation method, a compound system of the flaky silver powder and the spherical silver powder forms a high-activity surface after plasma activation, chemical bonding is formed through the ring-opening cross-linking reaction with the bio-based epoxy resin, a three-dimensional conductive network is constructed by means of the vertical bridging effect of the nano-zinc oxide whiskers, and the electron tunneling effect among silver particles is enhanced; and meanwhile, the silicon carbide nanoparticles are embedded into a resin matrix to form a hard supporting point, a chemical bonding layer established by a silane coupling agent at an interface bonding position inhibits microstress concentration, the mechanical stability and deformation resistance of a conductive path are synergistically improved, and the technical bottleneck that a conductive network is prone to fracture under the working condition of high-frequency friction of traditional silver paste is broken through.

The invention provides an environment-friendly antibacterial deodorant fiber fabric and a preparation method thereof, and relates to the technical field of textiles. According to the environment-friendly antibacterial deodorant fiber fabric and the preparation method thereof, the environment-friendly antibacterial deodorant fiber fabric consists of the following components in percentage by mass: 40-60% of alginate fiber; 10 to 25% of silver-loaded antibacterial fiber; 20-35% of polylactic acid fiber; 3-8% of a functional auxiliary agent; the silver-loaded antibacterial fiber is a nano-silver-loaded calcium alginate fiber or a silver sodium zirconium phosphate composite fiber, and the silver content is 15000-25000mg / kg; the functional additive comprises chitosan, a plant extract microcapsule and a biodegradable plasticizer. According to the environment-friendly antibacterial deodorant fiber fabric and the preparation method thereof, a composite antibacterial system is constructed through the alginate fibers and the silver-loaded antibacterial fibers, the alginate fibers provide high hygroscopicity and adsorb sweat to reduce bacterium breeding, the nano-silver / silver sodium zirconium phosphate provides broad-spectrum antibiosis, uniform distribution of silver particles is achieved through a microfluidic technology, silver ion agglomeration is avoided, and the antibacterial deodorant fiber fabric has the advantages that the antibacterial deodorant effect is achieved; the antibacterial capability of the environment-friendly antibacterial deodorizing fiber fabric is integrally and effectively improved.

The invention provides high-activity and high-dispersity submicron silver particles and a preparation method thereof, and belongs to the technical field of submicron silver. Comprising the following steps: (1) preparing a precursor solution; (2) preparing a reducing agent solution; (3) a reduction reaction stage; (4) a curing stage; (5) carrying out solid-liquid separation and cleaning; and (6) drying and collecting. The invention provides a novel method for preparing high-activity nano / submicron hierarchical structure silver particles under mild conditions, and the effects of uniform particle size, clear structural hierarchy and low-temperature high-density sintering are achieved by controlling precursor reaction and particle self-assembly behaviors.