3661 results about "Silver Nano" patented technology

The invention discloses a nano silver bacterial fibre preparation method comprising: adding fibre into AgNO3 solution, and adsorbing the mixture; and carrying out reduction reaction on the adsorbed fibre to obtain the nano silver bacterial fibre. The invention has simple production step, and the obtained product has the advantages of even silver nanoparticle distribution and long-lasting fibre antibacterial property and can be washed several times. The invention is suitable for natural fibre and synthetic fibre and can be used for health-care underwear, medicinal gauze, clothes, decorative textiles and the like.

The invention discloses a method for preparing nanometer silver lines in large batch. anhydrous silver nitrate AgNO3 with the concentration of 99.9percent, anhydrous glycol (C2H6O2) of 99.8percent and polyvinylpyrrolidone (PVP, with the molecular weight of 55,000) of 98percent are selected as the raw materials; in a microwave-assisting environment, the method of adopting the glycol to reduce the silver nitrate is adopted to prepare nanometer silver lines in large batch. By replacing the original solvent heating method with the high-heat environment created by microwave, the method not only greatly saves the reaction time but also reduces the preparing costs for the nanometer silver lines. The glycol, a moderate reducer, can slow the reaction, thus providing the time for the growth of nanometer silver lines. The method of the invention is the optimal method for preparing the nanometer silver line according to testing results by comparing the influence of micro strength, precursor concentration and microwave processing time on the appearance and size of the prepared nanometer lines. The method of the invention has low cost, is simple method and easily controlled and has high practical value in the application to the industrial production developing nanometer silver lines.

The invention relates to a nanosilver loaded adsorption carrier having filtration and sterilization effects and a preparation method thereof. The preparation method of the nanosilver loaded adsorption carrier comprises that a reducer is used for reducing a silver compound into elemental silver, use of a high-toxicity complexing agent is avoided, moreover, through acid purification treatment, alkali purification treatment and organic solvent purification treatment, an inorganic matter is dissolved in an acid or alkali firstly, then an organic matter is dissolved in an organic solvent, finally through further cleaning treatment with purified water, reaction remaining materials, freed or separated harmful impurities and the like are all purified to remove, and then through a high-temperature sintering process, the nanosilver loaded adsorption carrier with high purity (reaching 99.99%) can be obtained.

The invention relates to an omnidirectional antibacterial intelligent type air purifier for a vehicle, which comprises a shell, an air purification component, a fan power component, an energy component, an induction sensor component, a negative-ion generator and a display intelligent control component. The omnidirectional antibacterial intelligent type air purifier for the vehicle uses a nano silver modified titanium dioxide as a photocatalyst, thereby increasing photocatalysis effect and sterilization antibacterial performance. The omnidirectional antibacterial intelligent type air purifier for the vehicle uses an ultraviolet light emitting diode as a ultraviolet light source, thereby guaranteeing the photocatalyst to be capable of playing the role of degrading pollutants efficiently. The inner surface and the outer surface of an enclosure all have antibacterial performance, thereby guaranteeing bacteria not to live on the surface of an airframe of the omnidirectional antibacterial intelligent type air purifier for the vehicle, and guaranteeing personal safety. The omnidirectional antibacterial intelligent type air purifier for the vehicle can automatically induct air conditions, adjusts purification power in real time, and has intelligent control function.

The invention provides a nano-silver antibacterial fabric and a preparation method thereof. The nano-silver antibacterial fabric has the characteristics that a zinc oxide nano line grows on the fabric; and silver nano particles are deposited on the zinc oxide nano line. The zinc oxide nano line is synthesized by a solution chemical method; and the silver nano particles are deposited on the zinc oxide nano line by a simple 'immersion-illumination' method. The nano-silver antibacterial fabric prepared by the method has extremely obvious long-time antibacterial performance; the silver nano particles are small in size and cannot be accumulated; a synthesis process is environment-friendly; and the nano-silver antibacterial fabric can be recycled and reused. The nano-silver antibacterial fabric can be used for single-point water treatment to reduce microorganism content in water and can be suitable for medical surgical dressing and medical fabrics; and the nano-silver antibacterial fabric can be used as an antibacterial air filtration device for preventing bio-aerosol from being gathered on a ventilating, heating and air conditioning system.

The invention discloses a method for preparing a stable transparent electrode provided with a neutral PEDOT/PSS conducting layer. The transparent electrode comprises a transparent base material layer and the conducting layer covering the transparent base material layer, wherein the conducting layer comprises a coated first silver nanowire conducting layer part and a second neutral PEDOT/PSS macromolecule conducting layer part or a macromolecule conducting layer part formed by mixing neutral PEDOT/PSS with silver nanowires, and the PEDOT/PSS macromolecule conducting layer part is made of neutral PEDOT/PSS conductive ink. The preparing method comprises the steps that 3,4-EDOT is polymerized into PEDOT/PSS dispersion liquid in the presence of PSS, alkaline additives are added to regulate the PH, neutral PEDOT/PSS dispersion liquid is obtained after the ink strength is high enough through the seasoning technology, and at least one kind of organic functional auxiliaries is added to the neutral PEDOT/PSS dispersion liquid to obtain the stable transparent electrode. The transparent electrode prepared with the method has the advantages of being high in conductivity, high in light permeability, simple in preparing technology, resistant to weather and current stability and the like and can be applied to the fields such as organic solar cells, organic light emitting diodes and touch display screens.

Ultraviolet-preventing antibacterial fabric comprises, by weight percentage, 10-15% of adhesive anion functional fibers, 10-15% of soybean protein fibers, 20-30% of bast fibers, 5-10% of wool fibers, 5-10% of nanometer bamboo carbon fibers, 10-15% of chitin fibers, 2-5% of nano-silver-ion fibers, 4-6% of ultraviolet-preventing finishing agents, and 2-4% of mosquito-repellent finishing agents. The ultraviolet prevention performance and air permeability of the fabric are improved, and meanwhile the fabric has effects of preventing bacteria and repelling mosquitoes. The fabric is good in application effect in home textiles, sanitary products, sports goods, health care, bacteria prevention and mosquito repellent.

The invention relates to an air purifying composition, and a preparation method and use thereof. The method comprises: adding 0.1 to 40 parts of mixed fatty alcohol, 0.01 to 10 parts of dispersing aid, 106 parts of water and 0.01 to 5 parts of synergistic components into a reaction kettle under normal temperature and at room temperature, and fully stirring; adding 0.01 to 10 parts of nano silver solution and 0.05 to 10 parts of plant extract in turn, and uniformly stirring; and performing ultrasonic dispersion treatment on the mixture in the reaction kettle to obtain the air purifying composition. The air purifying composition prepared by the method has high antibacterial performance, can effectively remove harmful volatile organic matters and improve air quality in rooms, carriages, public places and the like, is safe and low in production cost and has high market competitive power.

The invention discloses a silvered graphite and its producing method which is coated by outside plated nano graphite microchip. The method includes: making the nano graphite microchip orderly sensitize, activate, degelation pretreat, and re-disperse in the ethanol water solution, adding a certain amount of aminosilane as mother liquid; adding the silver nitrate into deionized water for dissolving, adding ammonia and/or sodium hydroxide to get [Ag(NH3)2]OH] solution, then feeding the reducing agent and [Ag(NH3)2]OH] solution into the mother liquid that finishing the nano graphite microchip silvering, filtering and washing, drying in vacuum to obtain silvered nano graphite microchip. The inventive silvered graphite has a high conductivity, a low density, a low cost, a low resistivity in which the pulverous volume resistivity is 8*10-5omegacm. The method has a simple craft, a low demanded device. The produced nano graphite microchip is silvered an even and continuous silver layer on surface with a high availability of silver nitrate.

The invention discloses a preparation method of a flexible surface enhanced Raman substrate. The method comprises the steps of preparing a flexible substrate of a micro-nano structure with a regular appearance, sequentially carrying out surface hydrophilic treatment and silanization treatment on the flexible substrate, then depositing gold-silver nano particles on the surface of the flexible substrate, wherein sufficient gold-silver nano particles can be deposited, and the gold-silver nano particles are uniformly distributed. The prepared flexible surface enhanced Raman substrate is high in detection sensitivity, good in signal consistency and convenient to use; the preparation method is simple in process and easy to operate.

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.

Attapulgite-silver nano composite antiseptic material and its preparation method is provided, which characterized in that exchangeable silver ion and nano silver particle exist on the surface of nano bar-shaped attapulgite.It is prepared that attapulgite clay act with silver reagent under the presence of surfactant and organic reductant. Silver particle with grain size being several nanometer has large activity, can continuously slowly release antiseptic silver ion. Nano silver particle bind fast with attapulgite,so attapulgite-silver nano composite antiseptic material has good antiseptic property,can be widely used in chemical fiber, plastics etc.

The invention discloses a nano-silver antibacterial composite modified by modified chitosan and a preparing method of the nano-silver antibacterial composite. According to the nano-silver antibacterial composite and the preparing method of the nano-silver antibacterial composite, the chitosan with the small molecule quantiy and good water solubility is selected and used as a raw material, chemical modification is conducted on the chitosan by using small molecules which are capable of having chelation with nano-silver particles, the modified chitosan is arranged on the surfaces of the nano-silver particles in a covalent modification mode, and the novel nano-silver antibacterial composite is prepared. The prepared nano-silver antibacterial composite modified by the modified chitosan has good water solubility and dispersibility and can be stably dispersed in a water solution in a long term without aggregation under the conditions of high salinity and wide pH. The prepared nano-silver antibacterial composite modified by the modified chitosan enables the antibacterial property of the chitosan and the antibacterial property of nano-silver to be in effective synergy, the antibacterial performance is good, and the nano-silver antibacterial composite can serve as a water coating agent to perform the surface antibacterial function on the surfaces of materials and can also permeate into fiber type materials to perform the deep internal antibacterial function.

The invention belongs to the technological field of nanometer material, in particular to a method for synthesizing mass silver nano-wires of high concentration. The method takes silver nitrate as the silver source and stainless steel as an assistant agent. The material protected by inactive gas is oil-bathed at the temperature of 100 to 200 DEG C for 30 to 300 min in a recycling device, then silver nano-wires of the diameter of 50 to 800 nanometers and the length of 1 micrometer to 100 micrometers can be obtained, and the composition of the product is pure silver. The silver nano-wires made by the method have the advantages of regular crystal structure, large specific surface and controllable thickness and length. The silver nano-wires have wide application value in the field of optics, electricity and material, synthesis of polymer composites that is electricity and heat conductive, electrical radiation and static electricity proof and antibacterial, assembly of nanometer devices, design of advanced catalyst, biological fluorescence label, micro transmission, nanometer memory material, reinforced fluorescence and enhanced Raman spectroscopy, etc.

The invention provided synthesis and application of a nano-silver antibacterial fiber. The fiber from natural polymer fibers or synthetic polymer fibers, or both portfolio and nano-silver composition, and the silver nano particle size range of 10~80nm. Fiber can be used sausage or PGA fiber. In particular, medical lines or used medical dressings. The nano-silver antibacterial line and bandages have long-lasting and broad-spectrum antibacterial activity, non-toxic, non-stimulating, security features applicable to a variety of medical uses.

The invention provides hemostatic bacteriostatic biological dressing and a preparation method thereof. Nano silver and hemostatic medicament are uniformly distributed in a spongy or film-like biological dressing matrix made of a biological material, wherein the weight of the nano silver is 0.01 to 3 percent of the weight of the biological material, and the weight of the hemostatic medicament is 0.1 to 10 percent of the weight of the biological material. The method for preparing the spongy biological dressing comprises the following steps of: soaking the freeze-dried sponge into silver nitrate solution to prepare nano silver-carrying biological sponge at a high temperature under a high pressure, and soaking the nano silver-carrying biological sponge into solution containing the hemostatic medicament to obtain the spongy biological dressing by freeze drying. The method for preparing the film-like biological dressing comprises the following steps of: preparing biological material solution containing silver nitrate into nano silver-carrying solution at a high temperature under a high pressure, adding the hemostatic medicament into the cooled nano silver-carrying solution, casting the mixture to form a film, and drying the film at room temperature to obtain the film-like biological dressing. The hemostatic bacteriostatic biological dressing has the characteristics of safety, no toxicity, good biocompatibility and degradability and obvious bacteriostatic and hemostatic effects; and the preparation method is simple and has strong operability and low cost.

The present invention relates to an antibacterial and antiviral non-woven fabric, a preparation method of the fabric and a mask containing the fabric. The antibacterial and antiviral non-woven fabriccontains nano-silver, and also contains an inorganic antibacterial agent and/or an organic antibacterial agent; the inorganic antibacterial agent comprises any one or combination of at least two of nano titanium dioxide, nano zinc oxide, bismuth tungstate and nano silicon dioxide; and the organic antibacterial agent comprises chitosan and/or quaternary ammonium salt. The mask sequentially comprises a first fabric layer, the antibacterial and antiviral non-woven fabric and a second fabric layer from inside to outside. While the air permeability is not affected, the mask is endowed with the long-acting antibacterial, anti-haze and antiepidemic antiviral properties, has the catalytic degradation function for harmful gases such as formaldehyde and benzene in air, and can be repeatedly washed with water to be recycled, thereby greatly reducing the use cost of the protective mask.

The invention provides a wool fibre fabric sweat shirt (pants) with functions of powerful antibiosis, cancer prevention and life prolonging by utilizing nano silver, selenium and germanium, belonging to the technical field of healthy wool textile fibre fabrics clothes production. In the real life of people, various germs, viruses and fungi are contacted unavoidably, in particular, various bird flu and HIV discovered currently seriously threaten the health of human beings. Nano silver can kill 650 types of pathogens; far-infrared rays are almost absorbed by the skin of human body completely to lead the surface temperature of the skin to rise; heat energy impels the blood vessel to expand, improves blood circulation and microcirculation; the electromagnetic wave is colorless, tasteless and formless, can easily cause pollution to human body and is a potential killer. The anions in the air are vitamins and longevity elements in the air and are beneficial to human body; selenium and germanium are important elements to prevent and resist cancer; and the mixture of bee series can comprehensively supplement a plurality of nutrient active components required by human body. After nano treatment, the efficacy of anti-aging traditional Chinese medicine can be improved to 100 times.

The embodiment of the invention discloses a preparation method of nano-silver dispersion liquid. The preparation method comprises the following steps that thickening agents and dispersing agents are added into pure water or deionized water, then, soluble silver salt is dissolved in solution, and the silver salt solution is obtained; and under the stirring effect, silver complexing agents are firstly added into the silver salt solution, then, reducing agents are added, or silver complexing reduction agents are directly added, the reaction is carried out for at least 12 hours under the condition of room temperature to 90 DEG C, silver ions in the silver salt solution are reduced into metal silver, the nano-silver dispersion liquid is obtained, the silver complexing agents and the silver complexing reduction agents can form the chemical bonding with the nano-silver particle surface, and in addition, functional groups with the cross linking effect are reserved. The invention correspondingly provides the nano-silver dispersion liquid prepared by the method. The process of the preparation method is simple, the stability of the prepared nano-silver dispersion liquid is good, nano-silver particles are uniform, the application is convenient, and the bonding force of the nano-silver and substrates is high. In addition, the invention also provides a preparation method of a nano-silver antibacterial coating.

The invention relates to an Ag/BiOBr composite photocatalytic material and a preparation method and application thereof, belongs to the field of photocatalytic materials. The invention uses a low-temperature soft chemical method, compounds a novel semiconductor BiOBr and silver nanoparticles to prepare the Ag/BiOBr composite photocatalyst material. The unique interaction between Ag and BiOBr enhances the absorption properties of the catalyst to visible light and speeds up the transport process of photon-generated carriers, reduces the recombination probability of electron-hole pair, and improves the quantum efficiency of visible photocatalysis. Under visible light, the composite catalytic material has extremely high degradation performance of organic dyes. The invention has simple preparation process, mild conditions, low cost and good prospects for industrial application.