16 results about "Silver acetate" patented technology

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 application discloses a polarization LED device with adjustable light-emitting color and a preparation method thereof. The preparation method comprises the following steps: mixing cesium oleate, erbium oleate, indium acetate, bismuth acetate, silver acetate, benzoyl chloride, dioctyl ether, oleic acid and oleylamine in proportion, then heating to 120-170 DEG C under a nitrogen atmosphere, reacting for 1-5 min, and stopping the reaction; adding a mixed solution of cyclohexane and ethyl acetate into the reaction solution, centrifuging, collecting the precipitate, repeating the operation, obtaining quantum dots, dispersing the quantum dots in cyclohexane to obtain a quantum dot solution; mixing the quantum dot solution with an inorganic polysilazane solution, ultrasonic dispersing, then heating the mixed solution to 70-90 DEG C, stirring and reacting for 10-15 h, so that the inorganic polysilazane is hydrolyzed to form a dense silicon oxide shell, and a slurry is obtained; preparing the slurry into a film, attaching the film to an LED device, and the polarization LED device with adjustable light-emitting color is obtained. The doping concentration is controlled by introducing a bait ion into a double perovskite system and utilizing energy transfer to realize light-emitting color.

The invention discloses a chitosan-based membrane as well as a preparation method and application thereof, and belongs to the technical field of packaging materials. The chitosan-based film has a double-layer structure consisting of an inner layer and an outer layer, the outer layer is a water-blocking antibacterial layer formed by a silver complex, and the inner layer is an antibacterial antioxidant layer formed by polyphenol; the silver complex is a complex which is formed by the reaction of pyrrole-2-formaldehyde-g-chitosan and silver acetate; the polyphenol is formed by grafting 3, 4-dihydroxy methyl phenylacetate on the chitosan. The silver complex water-blocking antibacterial layer is constructed on the outer layer, and the polyphenol antibacterial anti-oxidation layer is constructed on the inner layer, so that the double fresh-keeping mechanism of external protection and internal maintenance is realized, and the comprehensive performance and application potential of the material are remarkably improved.

The application belongs to the technical field of chemical synthesis, and particularly relates to a synthesis method of 2-aryl-2-cyclohexanedione enol ester compounds. The method uses a transition metal complex as a catalyst, and uses a phenyl boronic acid compound and an iodine onium compound as raw materials, first synthesizes a 3-hydroxy-2-aryl-2-cyclohexenone compound, and then synthesizes the 2-aryl-2-cyclohexanedione enol ester compound through acylation. The reaction condition is mild, no additional additives (such as alkali-sodium acetate, expensive silver salt-silver acetate, etc.) need to be added, the C-C bond can be efficiently and quickly constructed, the 2-aryl-2-cyclohexanedione cyclization derivative is obtained, the reaction operation is simple, the reaction time is short, the method has high efficiency and high safety, the substrate range is wide, the functional group tolerance is good, the method conforms to the concept of green chemistry and high atomic economy, and is very suitable for large-scale industrial production.

The invention provides a reflective integrated electrochromic device. The reflective integrated electrochromic device sequentially comprises a first substrate layer, a working electrode layer, an integrated electrochromic layer, a counter electrode layer and a second substrate layer, the integrated electrochromic layer comprises a metal source compound; the metal source compound is selected from silver chloride, silver acetate, silver nitrate, silver perchlorate, silver sulfate, silver cyanide, silver sulfide, silver hexafluorophosphate, silver tetrafluoroborate, silver tetrachloroaluminate, silver trifluoromethanesulfonate, silver bis (trifluoromethane sulfonimide), copper fluoride, copper chloride, copper cyanide, copper sulfate, copper acetate, copper aluminate, cuprous fluoride, cuprous chloride, cuprous cyanide, gold chloride and gold cyanide; the catalyst is one or more of gold sulfide, gold chloride, gold (II) sulfide, nickel chloride, nickel sulfate, cobalt chloride and platinum chloride. The device has a relatively large transmittance / reflectivity dynamic change range, can perform light and heat management at the same time, and can keep a stable coloring or fading state for one month or even several months under a no-load condition.

An asbestos free friction material composition and associated brake pad for vehicles including inorganic and / or organic and / or metallic fibers, at least a binder, at least a friction modifier or lubricant, at least a filler or abrasive and at least a soluble salt of barium and / or calcium and / or aluminum and / or silver with percentage between 0.5-10% by weight. Among them barium carbonate, calcium hydroxide, aluminum triacetate and silver acetate are preferably.

The invention discloses a green light-emitting core-shell quantum dot and a preparation method thereof, and relates to the technical field of quantum dots. Comprising the following steps: dissolving powdered sulfur in oleylamine to obtain a sulfur stock solution; the preparation method comprises the following steps: mixing silver acetate, indium acetate, gallium triacetylacetonate and oleylamine, degassing, heating to 100-120 DEG C, injecting a ligand and a sulfur stock solution, heating to 270-280 DEG C, reacting, purifying the obtained coarse AgInGaS2 core quantum dot, dispersing in oleylamine, adding GaCl3 and the sulfur stock solution at 115-125 DEG C, heating to 220-260 DEG C, reacting to grow an AgGaS2 shell layer, purifying, and drying to obtain the AgInGaS2 core quantum dot. The green light-emitting core-shell quantum dot with high blue light absorption coefficient (up to 6.46 * 10 < 5 > M <-1 >. Cm <-1 >), narrow-spectrum emission (the half-peak width is 32 nm), defect-free light emission, high color purity and high light-emitting efficiency (up to 94%) is obtained.

The application discloses a kind of supported nanometer zero-valent iron and nanometer silver bimetallic activated carbon composite material and its preparation method and application: 1) take activated carbon powder and add acid solution to be stirred sufficiently, and acidification treatment is carried out to activated carbon, after solid-liquid separation, the obtained solid is washed with deionized water to pH value unchanged, then drying is carried out, and acidification treatment activated carbon is obtained;2) with volume percentage 30-60% ethanol aqueous solution as solvent, mixed solution, the concentration of iron nitrate nonahydrate is 66.5~335g / L, and the concentration of silver acetate is 0.8~5g / L, add acidification treatment activated carbon, mix evenly, after sufficient reaction, impregnate under vacuum condition at 25-85 DEG C for 7-13h, and obtain impregnated activated carbon;3) impregnated activated carbon is calcined under inert gas condition at 300-950 DEG C for 2-4h, and supported nanometer zero-valent iron and nanometer silver activated carbon composite material is obtained.

The invention discloses a windmill-shaped alpha-Fe2O3 / Ag nano hybrid material and a preparation method and application thereof in relieving plant salt stress, and the method comprises the following steps: mixing fusiform alpha-Fe2O3 prepared by a forced hydrolysis method with silver acetate, then carrying out ball milling treatment, and then carrying out a high-temperature calcination process to obtain the windmill-shaped alpha-Fe2O3 / Ag nano hybrid material. And the windmill-shaped alpha-Fe2O3 / Ag hybrid structure formed by assembling the fusiform alpha-Fe2O3 and the Ag nanoparticles is obtained. The nano hybrid material has high specific surface area, excellent dispersity and remarkable leaf surface adhesion performance, when the nano hybrid material is applied to plant cultivation, the material can effectively relieve growth inhibition caused by salt stress, can regulate and control plant hormone signals, terpene and carbohydrate metabolism, sulfur metabolism, protein homeostasis and the like, realizes multi-channel comprehensive regulation, and has a wide application prospect. Therefore, the plant stress resistance and quality are improved.

An asbestos-free friction material composition and related brake pads for vehicles, comprising organic and / or inorganic and / or metallic fibers, at least a binder, at least a friction modifier or lubricant, at least a filler or abrasive, and at least soluble salts of barium and / or calcium and / or aluminum and / or silver in a proportion of between 0.5 and 10% by weight, of which barium carbonate, calcium hydroxide, aluminum triacetate, and silver acetate are preferred.

The invention relates to the technical field of heat-conducting materials, and particularly discloses silver acetate modified boron nitride, a preparation method thereof and application of the silver acetate modified boron nitride in a heat-conducting gasket. The silver acetate modified boron nitride provided by the invention comprises the following raw materials: 0.05-0.5 M of a silver acetate ethanol solution and boron nitride, wherein the weight ratio of silver to boron nitride in the silver acetate ethanol solution is (5-15): 100; the invention also provides a preparation method of the silver acetate modified boron nitride, and the preparation method comprises the following steps: uniformly mixing a silver acetate ethanol solution with boron nitride, and carrying out irradiation photo-thermal reaction on the mixture under inert atmosphere and photo-thermal synergistic conditions to obtain the silver acetate modified boron nitride. The surface of boron nitride is chemically modified, the obtained silver acetate modified boron nitride has excellent dispersity and stability, and the heat-conducting gasket with good heat-conducting property, good mechanical strength and excellent insulating property can be prepared by using the silver acetate modified boron nitride.

The application discloses a melting accelerator and preparation and application thereof. The melting accelerator comprises the following components in parts by weight: 10-25 parts of a grinding aid, 15-25 parts of a decomposition promoter, 10-20 parts of a mineralizer, and 30-65 parts of water; the grinding aid comprises at least two of polyether polyol, polyglycerol and sodium glucoheptonate; and the decomposition promoter comprises at least two of silver acetate, silver hexafluoroantimonate and sodium nitrate. The melting accelerator can be applied in a cement clinker sintering process. The application aims at the problem that the mineralizer added in the cement clinker calcination process cannot simultaneously control the cement clinker setting time and the raw material burnability and decomposition heat efficiency, and a liquid type melting accelerator with low dosage and stable and uniform efficacy is prepared through reasonable collocation of grinding components, decomposition components and mineralization components. The accelerator can stimulate the activity of the cement clinker, promote the decomposition of carbonates, improve the burnability of the raw material, and reduce the actual coal consumption in the clinker calcination process.

The application belongs to the field of medicine and specifically relates to a method for preparing a compound shown in formula I, comprising the following steps: mixing a compound shown in formula V, a coupling catalyst, an oxidant and dimethyl sulfoxide, and reacting under the conditions of 50 DEG C-200 DEG C and normal pressure to obtain the compound shown in formula I; wherein the coupling catalyst is selected from one or more of chloro rhodium dimer of norbornadiene, palladium single substance, palladium acetate, tetrakis (triphenylphosphine) palladium and bis (dibenzalacetone) palladium; the oxidant is selected from one or more of manganese dioxide, silver oxide and silver acetate; R1 is selected from C1-C6 alkyl. The application also relates to a method for preparing bicyclic alcohol. The method for preparing the compound shown in formula I has the advantages of high yield, high selectivity, mild reaction conditions and simple operation.

A reflective integrated electrochromic device, sequentially comprising: a first substrate layer (11), a working electrode layer (12), an integrated electrochromic layer (13), a counter electrode layer (14), and a second substrate layer (15), wherein the integrated electrochromic layer (13) comprises a metal source compound, the metal source compound being selected from one or more of silver chloride, silver acetate, silver nitrate, silver perchlorate, silver sulfate, silver cyanide, silver sulfide, silver hexafluorophosphate, silver tetrafluoroborate, silver tetrachloroaluminate, silver triflate, silver bistrifluoromethanesulfonimide, copper fluoride, copper chloride, copper cyanide, copper sulfate, copper acetate, copper aluminate, cuprous fluoride, cuprous chloride, cuprous cyanide, gold chloride, gold cyanide, gold sulfide, gold monochloride, aurous sulfide, nickel chloride, nickel sulfate, cobalt chloride, and platinum chloride. The dynamic change range of the transmittance / reflectance of the device is relatively large, and the device can achieve simultaneous management of light and heat, and can maintain a stable colored or faded state for one month, or even several months, under no-load conditions.

The application belongs to the technical field of pharmaceutical chemistry and pharmacology, and relates to application of a forskolin tetracyclic analogue in preparation of an anti-inflammatory drug, the forskolin tetracyclic analogue has a chemical structural formula shown in formula (I), 7-deacetyl forskolin 1 is obtained by reaction of forskolin and sodium methoxide in methanol, then the forskolin rearrangement product 2 is obtained by reaction of the 7-deacetyl forskolin 1 and sodium periodate in a DCM-H2O mixed solution, the forskolin rearrangement product 2 and DMP, pyridine are reacted in acetonitrile to obtain the forskolin rearrangement product 3, and finally the forskolin rearrangement product 3 is reacted with aryl iodide in anhydrous dichloroethane under catalysis of anhydrous silver acetate, anhydrous copper acetate and palladium acetate to obtain the forskolin tetracyclic analogue. The forskolin tetracyclic analogue obtained in the application has strong anti-inflammatory activity and can be used for preparation of an anti-inflammatory drug.

The application belongs to the technical field of pharmaceutical chemistry and pharmacology, and relates to application of a forskolin oxygen bridge ring derivative in preparation of anti-inflammatory drugs. The forskolin oxygen bridge ring derivative has a chemical structural formula shown in formula (I), is obtained by reacting forskolin and potassium hydroxide in methanol to obtain forskolin rearrangement product 1, and then reacting the forskolin rearrangement product 1 with aryl iodide in anhydrous dichloroethane under the catalysis of anhydrous silver acetate, anhydrous copper acetate and palladium acetate to obtain the forskolin oxygen bridge ring derivative (I). The forskolin oxygen bridge ring derivative obtained by the application has relatively strong anti-inflammatory activity, and the activity is equivalent to that of dexamethasone, and can be used for preparing anti-inflammatory drugs.