2864 results about "Silver ion" patented technology

An integrated programmable conductor memory cell and diode device in an integrated circuit comprises a diode and a glass electrolyte element, the glass electrolyte element having metal ions mixed or dissolved therein and being able to selectively form a conductive pathway under the influence of an applied voltage. In one embodiment, both the diode and the memory cell comprise a chalcogenide glass, such as germanium selenide (e.g., Ge₂Se₈ or Ge₂₅Se₇₅). The first diode element comprises a chalcogenide glass layer having a first conductivity type, the second diode element comprises a chalcogenide glass layer doped with an element such as bismuth and having a second conductivity type opposite to the first conductivity type and the memory cell comprises a chalcogenide glass element with silver ions therein. In another embodiment, the diode comprises silicon and there is a diffusion barrier layer between the diode and the chalcogenide glass memory element. Methods of fabricating integrated programmable conductor memory cell and diode devices are also disclosed.

The invention relates to a method for producing UV polarizers, according to which spheroid particles situated near the surface of the glass are incorporated into the support material (primarily standard float glass) in a novel arrangement. According to the method for producing UV polarizers, after the introduction of metal ions (e.g., silver ions) into the glass surface, a large size distribution of particles is achieved by multiple alternation of a heat treatment for separating out spherical metal particles, followed by the renewed introduction of metal ions and a subsequent heat treatment. A deformation of the glass produces spheroid particles of various sizes and different semi-axis relationships. The particles are characterized by their large size distribution and are deformed differently in relation to their spheroid shape. In this way UV polarizers are produced which have a wide absorption range since the absorption bands having different maximum positions overlap.

Carpeted floor covering articles comprising carpet pile fibers to which a topical antimicrobial application of solid particles has been applied either during or after product manufacture (such as part of a cleaning or treatment process) are provided. Such a topical treatment includes specific inorganic antimicrobial metal ion-based solid compounds, such as silver ion-exchange compounds, silver zeolites, and/or silver glasses, which may or may not be dispersed within a liquid medium for ease in handling and application. Such treatments also optionally include compositions of stain resistant agents, anti soil-redeposition compounds and liquids, surfactants, antistatic agents, and the like, to impart other characteristics to the target carpeted products. Such carpeted products thus exhibit excellent antimicrobial characteristics at both the surface of the carpet pile, as well as within the pile itself. Furthermore, it has been found that application of such solid metal-ion based antimicrobials permits the ability to increase antimicrobial activity for the target carpet product after vacuuming.

The invention relates to zeolite-based composite antibiotic material and a process for preparation, the material of which is low-silicon-aluminum-ratio zeolite molecular sieve which is used as the base and carrier, the outer surface of the invention is covered with nanometer titanium dioxide particles, and the pore passages or cages of the invention are provided with metallic ions which have antibiotic effect. The process for preparing the material is that low-silicon-aluminum-ratio zeolite molecular sieve absorbs organic amine to saturation and then is dipped into soluble titanates for roasting to generate nanometer titanium dioxide on the outer surface of zeolite, and metallic ions such as silver ions, copper ions and the like which have antibiotic effect are exchanged to zeolite by the ion exchange process to form the novel composite antibiotic material. The composite antibiotic material not only has the antibiotic effect of metallic ions but also has the antibiotic effect of nanometer titanium dioxide, and thereby the antibiotic effect is strengthened. The composite antibiotic material is easy to prepare, low in price and suitable for industrial production.

The invention provides a method for preparing silver nanometer wire with controllable wire diameter by a cation control microwave method, aiming at solving the problems of rough wire diameter, low diameter ratio and the like during preparation of the silver nanometer wire by the traditional microwave method. The method comprises the following steps of: (1) adding a mixture of silver nitrate powder and a dispersing agent into ethylene glycol and preparing a solution reaction system containing silver ions; (2) adding a cation control agent in the solution reaction system containing silver ions and evenly stirring to obtain a reaction precursor; and (3) irradiating the reaction precursor under microwave, centrifuging, ultrasonically washing and drying the solution prepared through microwave irradiation to obtain the silver nanometer wire powder with controllable wire diameter. The invention has the advantages of simple preparation method, high efficiency and low cost and ensures that the high-quality silver nanometer wire can be prepared repeatedly within wide range of reaction condition. By using a soft template method, the size of the wire diameter is controlled by using the cation control agent without introducing any impurity.

Wound care devices having a topically applied silver-based antimicrobial finish are provided. The finish comprises at least one silver ion-containing compound and at least one binder compound. The finish may be applied to a target substrate, such as a fiber, fabric, film, foam, hydrogel, or hydrocolloid to provide a single layer antimicrobial wound care device. Alternatively, a silver-containing layer may be combined with one or more additional layers of target substrate to provide a composite antimicrobial wound care device. The device may also contain an odor-absorbing component capable of reducing or eliminating odors that are inherently associated with infectious wounds. Also provided is a method for making the wound care device and a composition of matter comprising the silver-based antimicrobial finish.

The present invention provides a novel visible catalyst-silver phosphate and a preparation method thereof, solving the problems of wide TiO2 forbidden band, no absorbability of visible weakness, and the like in the prior art and applying Ag3PO4 to the field of photocatalysis for the first time. In the invention, a silver ammonia solution for replacing a silver nitrate solution is used as a silversource, the reaction of silver ions and phosphate ions is slowed, and then the catalyst is obtained and has the effect of high-efficiency photocatalytic degradation. The preparing method of the invention is simple and is favorable to extensive popularization.

The invention discloses a titanium alloy containing an antibacterial coating as well as a preparation method and application thereof. The titanium alloy deposited with nano-silver antibacterial coating on the surface is prepared by the following steps: preprocessing and sterilizing the surface of titanium alloy; then soaking the titanium alloy in a dopamine hydrochloride solution with mass-volume concentration of 1-10mg/mL for 12-36h to obtain titanium alloy deposited with a polydopamine thin film layer on the surface; and finally soaking the titanium alloy in a silver nitrate solution which is 5-100mmol/L in concentration for 12-36h. According to the titanium alloy disclosed by the invention, the titanium alloy is connected to silver nanoparticles by virtue of adhesion from self-polymerization of dopamine and adsorbed silver ions are reduced into nano-silver in situ through weak reducibility of the dopamine. Because of broad-spectrum antibacterial capacity of the nano-silver, an excellent antibacterial effect can be achieved with relatively low effect concentration. The invention provides new thinking for antibacterial modification of the titanium alloy, and can effectively promote application of a titanium alloy implant material in the fields of bone tissue repair and regeneration.

The invention discloses a method for manfuacturing a silver nanowire, and the method comprises the following steps of: (a) providing a mixed solution, wherein the mixed solution at least contains a protective agent and an additive, and the additive is a halide or a compound capable of generating an insoluble salt with silver ions; (b) providing a silver precursor solution containing silver compounds, and adding the precursor solution in the mixed solution at least in twice; and (c) separating to obtain the silver nanowire. The method for manufacturing a silver nanowire has the beneficial effects that the protective agent is adopted at first, and then the silver precursor solution is added at least in twice rather than one time, the silver nanowire with high wire diameter ratio and suitability for production in a large scale can be obtained.

Antimicrobial fabrics having a topically applied silver-based antimicrobial finish are provided. The finish comprises at least one silver ion-containing compound and at least one binder compound. The antimicrobial fabric may be formed into a garment to be worn as a base layer garment, close to the skin, which aids in the prevention of skin infection caused by abrasions to the skin. The garment may also aid in preventing the transfer of microbes from one person to another, for instance, after sharing communal items such as protective athletic equipment. The antimicrobial fabric exhibits long lasting antimicrobial efficacy against both Gram positive and Gram negative microbes and also exhibits antimicrobial efficacy after repeated wash cycles. Also provided is a method for making the silver-containing antimicrobial fabric.

An article including a surface having a coating thereon, in which the coating includes a base coat, firmly adhered to the surface, and a hydrophilic, biocompatible top-coat. An antibiotic ceramic component is dispersed in one or both of the base coat and top-coat. Preferably, the ceramic component is dispersed in the base coat. In a preferred embodiment, the ceramic component is a zeolite with silver ions exchanged onto internal acidic sites of the zeolite, and the top-coat includes a polysaccharide, such as hyaluronan. The zeolite is highly effective in imparting anti-microbial character to the coating.

Wound care devices having a topically applied silver-based antimicrobial finish are provided. The finish comprises at least one silver ion-containing compound and at least one binder compound. The finish may be applied to a target substrate, such as a fiber, fabric, film, foam, hydrogen, or hydrocolloid to provide a single layer antimicrobial wound care device. Alternatively, a silver-containing layer may be combined with one or more additional layers of target substrate to provide a composite antimicrobial wound care device. The device may also contain an odor-absorbing component capable of reducing or eliminating odors that are inherently associated with infectious wounds. Also provided is a method for making the wound care device and a composition of matter comprising the silver-based antimicrobial finish.

A dressing that comprises a contact layer for contacting a wound, with the contact layer including silicone; a foam-based hydrophilic middle layer that carries a metal-based antimicrobial agent; and a backing layer that prevents moisture within the dressing from escaping into the air through evaporation. Silicone in the contact layer interacts with the wound to minimize the appearance of scar tissue. Moisture, either applied beforehand or from the wound exudate, travels through the porous contact layer into the foam middle layer. There, the moisture acts to release metal ions from controlled-release mechanisms, such as zeolites containing the metal ions. The ions then travel within the moisture into the wound, where they act to kill bacteria and other infectious microorganisms and to prevent infections from gaining a foothold. Many embodiments, for the metal-based antimicrobial agent, use silver ions or a combination of silver ions and other metal ions.

The invention relates to a method for preparing a zirconium phosphate silver-carrying antimicrobial powder, particularly a cubic zirconium phosphate silver containing antimicrobial powder. The cubic zirconium phosphate silver-carrying antimicrobial powder is in the microstructure of a cube, the silver is carried by the cube, and the side of the cube has a length of 400-1,000nm. The method comprises the following steps: preparing a cubic zirconium phosphate carrier, mixing the cubic zirconium phosphate carrier with the aqueous solution of zinc nitrate, stirring to generate a zinc-carrying intermediate; preparing the zinc-carrying intermediate into an aqueous dispersion solution, adding the silver nitrate solution so that the carrier contains 1.5-3.5% of silver ions, stirring, washing, filtering, drying and forging to obtain the final product. The carrier is prepared by adopting the atmospheric-pressure hydrothermal synthesis method, and the hydrofluoric acid used as the template agent in the old process is replaced by the sodium oxalate. The process is simple and convenient to operate, and the equipment has high selectivity. The product and the product producing process are truly safe and nontoxic, the enamel equipment can be used as the production equipment, and the production cost can be saved.

A solar cell and photovoltaic power generation apparatus including a transparent electrically conductive film, a semiconductor provided on the transparent electrically conductive film, a conductive film opposing the semiconductor, and an electrolyte solution filled between the semiconductor and the conductive film. Metal ions, such as silver ions, may be dissolved in the electrolyte solution. When light is incident on the cell, the metal ions cause an oxidation-reduction reaction in the electrolyte solution and the cell is charged. When the open-circuit voltage decreases because the amount of incident light drops or light is blocked, the cell discharges to function as a secondary cell.

The present invention relates to a process for preparing hydroxylapatite bio-ceramic membranes at titanium or titanium alloy surfaces by utilizing differential arc oxidation process. Firstly, preparing electrolytic solution A by using calcium ion salts and phosphate radical ion-containing salts, or preparing electrolytic solution B by adding metal silver ions to the electrolytic solution A; or preparing electrolytic solution C by adding metal silicon ions to the electrolytic solution A; and then, selecting titanium or titanium alloy as anodes and putting them respectively into the electrolytic solution A, B and C, selecting the non-corrodible steel container for containing the electrolytic solutions as cathodes, controlling conditions such as impulse electrical source positive phase voltage, frequency for differential arc oxidation of titanium or titanium alloy, then hydroxylapatite bio-ceramic membrane layers possessing different performances are prepared. Said titanium based bio-ceramic compound material prepared according to said process possesses not only intensity and toughness of metals but also biological activity of hydroxylapatites, and is capable of being applied in the fields such as jackstraw chirurgery implantation body and tooth planting body.

The invention relates to an activated carbon fiber and a preparation method thereof. The compositions in weight percentage of the activated carbon fiber are: 80 to 95 percent of fiber-forming polymer, and 20 to 5 percent of functional additive component, wherein the fiber-forming polymer can be polyacrylonitrile, modified polyacrylonitrile, polyvinyl alcohol or regenerated cellulose fiber; and the functional additive component can be a superfine absorbent of supporting metal with the average diameter of between 0.01 and 20 mu meter; and the supporting metal can be one of a silver ion, a copper ion or a zinc ion. The preparation method comprises the following steps: a base material fiber-forming polymer fiber containing the functional additive component is prepared first, wherein the base material fiber can be a polyacrylonitrile fiber, a modified polyacrylonitrile, a polyvinyl alcohol fiber or a regenerated cellulose fiber base fiber; and different physical activation treatments or/and chemical activation treatments are carried out according to different base material fibers to produce the activated carbon fiber corresponding to the base material.

The invention relates to a preparation method of an inorganic/organic hybridization antibacterial film. The preparation method mainly comprises the steps of: (1) preparing a nano-silver-loaded molecular sieve germicide with stronger stability by ion exchange and a chemical reduction method; and preparing a molecular sieve/polymer hybridization antibacterial film loaded with nano-silver particles by a phase transformation film preparation process; and (2) taking N,N-dimethylformamide as a solvent and a reducing agent simultaneously, reducing silver ions to nano-silver serving as an antibacterial function body in a film casting liquid system in situ, and firmly loading the nano-silver in a polymer porous matrix material by a dispersion action and a coupling action of a coupling agent so as to form a nano-silver-loaded polymer porous film. The hybridization antibacterial film, provided by the invention, keeps excellent water flux, high retention rate and tough mechanical intensity, and has excellent antibacterial function, and can effectively solve the problems of loss of the silver ions of the silver-ion-loaded molecular sieve in the membrane filtration, loss of the nanometer inorganic particles in the polymer porous matrix, easy pollution of a separation film by microorganisms, and the like.

A spherical silver powder has a good dispersibility and is capable of obtaining a good degree of sintering even if used for forming a paste to be fired at a low temperature of 600° C. or less to form a conductor. An aqueous solution containing a reducing agent is added to a water reaction system containing silver ions, to deposit silver particles by reduction, to produce a spherical silver powder wherein a ratio (Dx/BET) of a crystallite diameter Dx (nm) to a BET specific surface area (m²/g) is in the range of from 5 to 200 and which has a crystallite diameter of not greater than 40 nm, a mean particle size of not greater than 5 μm, a tap density of not less than 2 g/cm³, and a BET specific surface area of not greater than 5 m²/g.

A tin-silver-copper contains plating solution which comprises water which is a primary medium, a sulfonic acid, a tin ion, a copper ion and a silver ion, wherein concentrations of the silver ion, the tin ion and the copper ion are 0.0015 to 0.1 mol/L, 0.21 to 2 mol/L and 0.002 to 0.02 mol/L, respectively; a plating film which has 2.6 to 3.4 weight percent of silver, 0.4 to 0.7 weight percent of copper and the substantially balanced amount of tin; an electrolytic plating method for use in forming the above plating film from the above plating solution; and a soldering method using the plating film.

The invention relates to a nanometer silver gelatine nanometer fiber film, which comprises the following parts: a gelatine nanometer fiber and a nanometer silver distributed in gelatine nanometer fiber homogeneously, wherein the nanometer silver particle attaches the surface of the gelatine nanometer fiber or in the fiber, the mean diameter of the gelatine nanometer fiber is 60-220nm, and the mean diameter of the nanometer silver is 4-50nm. The electrostatic spinning method comprises the following steps: making the spinning liquid by adding silver nitrate in gelatin-formic acid solution; getting the nanometer fiber film with silver ion by electrostatic spinning; deacidizing the silver ion in the fiber into the nanometer silver particle with ultraviolet irradiation method. The nanometer silver gelatine nanometer fiber film is used to make the artificial skin, the medical dressing, the hemostatic material and the sanitary cotton.

The invention discloses a silver/silicon dioxide double layer wall material-based multifunctional microcapsule phase-change material, and a preparation method thereof, and belongs to the field of microcapsule phase-change material. According to the preparation method, an organic phase change material, a silicon source, a modification agent with mercapto functional groups, an emulsifier, and a solvent are mixed and stirred so as to obtain an emulsion, and an initiator is added dropwise so as to obtain silicon dioxide signal-layer wall material microcapsules with mercapto groups; the silicon dioxide signal-layer wall material microcapsules, a silver source, a protective agent, and a reducing agent are mixed, and silver ion self assembling and reduction reaction are realized on the microcapsule surfaces under nitrogen protection so as to obtain the nano silver/silicon dioxide double layer wall material-based multifunctional microcapsule phase-change material. Particle size of the nano silver/silicon dioxide double layer wall material-based multifunctional microcapsule phase-change material ranges from 2 to 10<mu>m, possesses a double-layer structure composed of a metallic silver outer layer and an inorganic material silicon dioxide inner layer, is compact in structure, and high in thermal conductivity, possesses electrical conductivity, antibacterial properties, latent heat storage properties, and temperature regulation performance, and can be widely applied to the fields such as medicine, weaving, electron, and spaceflight.

The invention provides a method for preparing a silver/graphene antimicrobial composite material, and the method provided by the invention comprises the following steps: a) providing a reductive graphene oxide-sodium polystyrene sulfate composite solution; b) heating the composite solution obtained in the step a) to 50-70 DEG C; and c) adding a silver nitrate solution into the heated composited solution obtained in the step b) for reaction, thus obtaining the silver/graphene antimicrobial composite material. The invention provides the method for preparing the silver/graphene antimicrobial composite material; and in the method, a reductive graphene oxide tablet is taken as a reducing agent for carrying out reduction on silver ions under a neutral pH condition so as to generate silver nano particles. In the method provided by the invention, no sodium borohydride is taken as a reducing agent, and in the whole preparation process, no potassium hydroxide is adopted, therefore, when the composite material prepared by the method is subjected to later application, no large biological irritant is caused. In addition, antibacterial experiments show that the silver/graphene antimicrobial composite material provided by the invention has a better antibacterial effect.