54 results about "Silver halide" patented technology

The invention discloses a preparation method and application of composite nanoparticles with a gold-silver core-shell structure, and aims to solve the problems that silver halide precipitates are generated on the surface of a silver core and the silver core is etched in the prior art. The thiourea solution is used for replacing a halogen-containing reagent, uniform epitaxial growth of gold on the surface of the silver core is mildly achieved, the gold-shell silver-core nanoparticles which are evenly wrapped and stable in structure are prepared, and the gold-shell silver-core nanoparticles are suitable for the fields of immunodetection and the like and are good in color development effect and low in cost. The method comprises the steps of preparing a gold salt solution, preparing gold nano-seeds, preparing silver nano-cores and generating gold-shell silver-core nano-particles through a chemical reduction reaction, and the problem that a core-shell structure grows unevenly is solved. When the method is applied to immunodetection, the material cost can be remarkably reduced, and a better color development effect can be achieved.

The invention relates to the technical field of photovoltaics, in particular to a method for recovering metal lead in a perovskite component, which comprises the following steps: crushing the perovskite component to be recovered into a size of 2-3cm, soaking in a recovery solution, fully stirring and filtering to obtain a first filtrate; standing the first filtrate, and separating to obtain a second filtrate; adding alkali liquor into the second filtrate until lead ions in the second filtrate are completely precipitated, and filtering to obtain lead hydroxide precipitate and third filtrate; adding a silver nitrate solution into the third filtrate, and filtering to obtain a silver halide precipitate; and washing the obtained lead hydroxide precipitate with deionized water to be neutral, completely dissolving the lead hydroxide precipitate with an acid solution to obtain a high-purity lead-containing solution, carrying out halogen replacement with potassium iodide to obtain a lead iodide precipitate, filtering and drying the lead iodide precipitate, and reusing the lead iodide precipitate for preparing a perovskite solution. According to the method, the use of a large amount of organic solvent is reduced, the method is more environment-friendly, the health of workers is not harmed, the recycled lead iodide is reused for preparing the perovskite solution, and the method has higher economic value.

Embodiments of the present disclosure are directed to infrared optical lightguides or fibers formed with molten halide material (e.g., silver halide), which can provide low loss broadband transmission of wavelengths from approximately 0.5 microns to approximately 25 microns, and methods for forming such lightguides or other optical devices based on solidifying halide melts. In some embodiments, surfaces of a retaining element may be passivated (e.g., using a silver ion exchange process) before the molten halide material is deposited into the retaining element. In some embodiments, the molten halide material may be solidified in a microgravity environment.

The invention provides a rapid cooling device for film production, and belongs to the technical field of medical material manufacturing equipment.The rapid cooling device comprises an outer shell, an inner shell and an inner shell, the multi-temperature-zone air outlet machine comprises independent air ducts of a high-temperature zone, a normal-temperature zone and a low-temperature zone; the protective gas main pipeline is connected with an external protective gas supply source and the high-temperature area, and a heating wire is arranged at an inlet section of the high-temperature area; the shunting pipeline is connected to an upstream unheated section of the heating wire of the protective gas main pipeline, is connected to the normal-temperature area through a first flow regulating valve and is connected to the low-temperature area through a second flow regulating valve; the heat exchanger is used for cooling the protective gas entering the low-temperature area, and a cold source connector of the heat exchanger penetrates out of the outer shell to be connected with external refrigeration equipment. The device has the advantages that through the segmented independent air duct design, the progressive gradient cooling of the film is realized in combination with the differentiated air duct sectional area proportion and the heat insulation isolation structure; and uneven shrinkage of the coating is effectively avoided, and the thermal stress damage risk of the silver halide coating is reduced.

The invention discloses a preparation and liquid-phase ligand exchange method of a sulfydryl-free silver telluride colloidal quantum dot, and the sulfydryl-free silver telluride colloidal quantum dot is prepared by adopting oleylamine as a solvent and a ligand for quantum dot synthesis, silver halide as a cationic precursor and organic lithium modified TOP-Te as an anionic precursor through a thermal injection method. The size and the absorption spectrum of the silver telluride quantum dots are adjusted by accurately regulating and controlling the reaction time, the temperature, the halogen type and the organic lithium content. The method is simple to operate and good in repeatability, and the prepared silver telluride quantum dots have excellent size distribution and adjustable absorption wavelength (856-1589 nm). On the basis of oleylamine coordinated silver telluride quantum dots, conductive ink dispersed in polar solvent colloid is obtained by adopting a liquid-phase ligand exchange method which is simple to operate, a flat, compact, crack-free and few-defect high-quality thin film is prepared through a single spin-coating process, and the thin film has application potential in the field of short-wave infrared detectors.

The utility model discloses a waterproof weather-proof plastic, which is applied to a cable protection sleeve and comprises a PU (polyurethane) plastic substrate layer, the aramid fiber layer is arranged on the upper surface of the PU plastic matrix layer; the aluminum plastic film layer is arranged on the upper surface of the aramid fiber layer; the silver halide particle layer is arranged on the outer surface of the aluminum plastic film layer; wherein a plurality of reinforced bulges are uniformly distributed on the outer surface of the silver halide particle layer, and the tensile strength of the plastic is 180-200MPa. Compared with the prior art, the plastic provided by the utility model has excellent waterproof performance, and also has good ultraviolet aging resistance and weather resistance.

The present disclosure provides a substrate for surface-enhanced Raman scattering (SERS), comprising: a silver substrate having a silver nanostructured surface; and a silver halide passivation layer formed on the surface of the silver substrate. The present disclosure also provides a method for preparing the SERS substrate and a method for SERS trace detection using the substrate.

Provided are an image forming method and a mono-sheet laminate for forming a discharge image in which the reproducibility of discharge behavior is high and the occurrence of processing defects due to dust adhesion or the like is suppressed. The image forming method involves using a mono-sheet laminate (10) obtained by integrating a transparent supporting body (1) on which an image receiving element (2) and an auto-positive silver halide photographic photosensitive element (3) are laminated, a cover sheet (4) covering the photosensitive element (3), a conductive connecting member (6) for grounding which is connected to a peripheral part of a surface of the transparent supporting body (1), the surface being on the reverse side to the surface on which the image receiving element (2) is laminated, and a pod containing an alkaline processing liquid and forming an image on the mono-sheet laminate (10). The image forming method involves performing discharge on the mono-sheet laminate (10) from an electrode (32a) of a DC discharge device (30) disposed at a distance of 0-15 mm from a surface of the cover sheet (4) in the normal direction of the surface, and developing the alkaline processing liquid contained in the pod between the photosensitive element (3) and the cover sheet (4) to form a discharge image.

Provided are: an ionic compound having an anion structure represented by formula 1; and a composition, a functional material, and a silver halide photosensitive material or a diffusion-transfer-type silver halide photosensitive material containing the ionic compound. In formula 1: w represents an integer of 1 or more; x represents an integer of 2 or more; Sil1 represents a substituent containing at least three Si atoms, wherein a plurality of Sil1 may be the same or different; L1 represents a divalent linking group, wherein a plurality of L1 may be the same or different; and R represents an (x + w)-valent organic group containing a carbon atom.

Embodiments of the present disclosure include optical elements and methods of forming the same using light-based patterning in solidified molten halide material. Other embodiments include systems that include such optical elements. The light-based patterning may be performed, for example, by forming silver-comprising nanostructure inclusions in a solidified silver halide film using ultraviolet (UV) laser exposure.

The application discloses a green preparation method of silver nanowires, which comprises the following steps: adding silver powder with a purity of greater than or equal to 99.9% into a polyvinylpyrrolidone aqueous solution, stirring for 20-40 min, adding metal halide MX n , uniformly mixing, reacting under an oxidizing condition at 70-90 DEG C for 7-9 h under a pH of 1-3, centrifuging the silver halide colloid, washing to obtain a precipitate, dispersing the precipitate in water to obtain a silver halide dispersion, adding a surfactant aqueous solution and a reducing agent aqueous solution into the silver halide dispersion in sequence to obtain a mixed solution, sealing the mixed solution for reaction at 100-130 DEG C for 20-24 h, and obtaining silver nanowires; the silver nanowires prepared by the green preparation method have an average diameter of 20-60 nm, a length-diameter ratio of 400-4000, a uniform morphology and a large length-diameter ratio.

The invention relates to a preparation method of a nano silver halide emulsion, which comprises the following steps: S1, fully dissolving deionized water, sodium bromide, a nucleating aid, a stabilizer and gelatin in a container with disc type stirring, and uniformly mixing to prepare a primary glue solution; uniformly mixing silver nitrate with deionized water to prepare a silver nitrate solution; uniformly mixing sodium bromide, potassium iodide and deionized water to prepare a halogen solution; s2, at a certain temperature, injecting a prepared silver nitrate solution and a halogen solution into the primary glue solution at the same time to obtain a mother solution containing nano silver halide; and S3, desalting the mother liquor containing the nano silver halide, supplementing glue, and sensitizing to obtain the nano silver halide emulsion. The nucleating aid and the stabilizer are added into the gelatin aqueous solution, the prepared nano silver halide particles are uniform, stable in storage and free of aggregation, and the emulsion can be desalted at normal temperature, is low in energy consumption and high in production efficiency, and is beneficial to continuous production.

Provided are a compound represented by formula 1, and a composition, a functional material, a photographic photosensitive silver halide material, and a diffusion-transfer-type photographic photosensitive silver halide material that contain the aforementioned compound. In the formula, Q represents a group selected from the group consisting of -CO2M, -SO3M, -NG1G2G3E, and groups having a polyoxyalkylene structure; M represents a monovalent to trivalent cation; w represents an integer of 1 or greater; x represents an integer of 1 or greater; Sil1 represents a group represented by formula Si-4; L1 represents a divalent linking group; R represents a single bond or a carbon-atom-containing (x+w)-valent organic group; R4, R4a, and R4b each represent a hydrocarbon group; p and q represent integers satisfying p≥1, q≥1, and p+q≥3; and * represents a bonding position with L1.

The application provides a composite photocatalyst, a polypropylene material and a preparation method thereof and an automobile interior part, and the composite photocatalyst comprises a molecular sieve loaded silver halide / bismuth oxyhalide and an activated carbon fiber loaded transition metal oxide. The molecular sieve loaded silver halide / bismuth oxyhalide can form a nano structure with high catalytic activity, and can effectively decompose VOC such as benzene series in the polypropylene material under ultraviolet light irradiation; and the activated carbon fiber loaded transition metal oxide can chemically react with aldehyde VOC, and effectively decomposes VOC such as aldehyde in the polypropylene material. By compounding the polypropylene resin, the stabilizer, the composite photocatalyst and the acid absorbent, the polypropylene material prepared from the polypropylene material has low odor and VOC content.

Provided are: a composition that contains a leveling agent and a binder, the leveling agent including a polymer C, the polymer C containing a constituent unit A that includes two or more specific structures, and a specific constituent unit B, and containing a constituent unit that includes at least one functional group from among -OH, -COOH, -SO3H, and polyoxyalkylene groups in a proportion of 10 mass% or less based on the total mass of the polymer C, and the binder including a polymer provided with a specific constituent unit E; a silver halide photographic sensitive material; a diffusion-transfer-type silver halide photographic sensitive material; a display material; and a printing plate material.

The invention discloses an anti-blue-light photochromic lens, which comprises a substrate, and is characterized in that the substrate is formed by mixing a resin monomer with photosensitive toner and curing, and the ratio of the resin monomer to the photosensitive toner is 10: 1.5; the hardening layer is dip-coated on the surface of the substrate; the anti-blue light layer is plated on the surface of the hardening layer; the color changing layer is arranged on the surface of the anti-blue-light layer and comprises a first silver halide layer, a second tawny layer and a third silver halide layer. The photosensitive toner permeates into the substrate, the color changing efficiency can be improved by matching with the color changing layer on the outer surface, indoor and outdoor conversion and switching are faster, and wearing and using are more comfortable. The anti-blue-light layer is arranged on the inner side of the color-changing layer, so that the anti-blue-light property of the lens can After the substrate is subjected to plasma treatment, ion bombardment is carried out on the silver halide layers of the hollow-out structure, the color changing effect is achieved, meanwhile, the silver halide layers are arranged on the front side and the rear side, transition is achieved through the tawny layer in the middle, sunlight irradiation resistance can be enhanced, and outdoor use is more comfortable.

The utility model discloses an anti-oil CTP (computer to plate) production device capable of automatically proportioning raw materials, which comprises a processing table, a first metering pump, a second metering pump and a mixing box are fixedly mounted on the outer wall of the processing table through a supporting mechanism, and outlet pipes of the first metering pump and the second metering pump extend into the mixing box. A rotating shaft is rotationally mounted in the mixing box, and a first motor connected with the rotating shaft is fixedly mounted on the upper end surface of the mixing box. Through the arrangement of the first metering pump, the second metering pump, the stirring blades and other components, the first metering pump and the second metering pump quantitatively pump a silver halide solvent and a developing solution according to the proportion and pump the silver halide solvent and the developing solution into the mixing box, and then the first motor can drive the rotating shaft to rotate; the rotating shaft is matched with the mounting sleeve to drive the plurality of stirring blades to rotate, so that the silver halide solvent and the developing solution can be stirred and mixed by the plurality of stirring blades, and the developing solution containing the silver halide solvent can be obtained.

The invention provides an industrial X-ray film and a preparation method thereof, and relates to the field of industrial X-ray films. The preparation method of the industrial X-ray film comprises the following steps: preparing a silver halide cubic particle emulsion, carrying out in-situ composite modification, preparing an emulsion layer coating liquid, and carrying out coating molding. According to the preparation method of the industrial X-ray film, the problems of obvious image granularity, transverse migration of silver atoms and combination of development centers between adjacent particles can be effectively solved, the utilization rate of X-ray photons is improved while the image resolution is improved, and the photosensitive sensitivity and the photosensitive response range are effectively improved; and the long-term stability, especially the pressure stability and the environmental stability, of the industrial X-ray film is improved.

This invention provides a lithium metal anode, its preparation method, and its application. The lithium metal anode includes a lithium metal matrix and an activation layer covering at least a portion of its surface; the lithium metal matrix includes lithium and silver; the activation layer includes lithium nitride and a first silver halide, wherein the first silver halide includes silver iodide. This invention provides an activation layer with specific chemical activity on the surface of a silver-containing lithium metal anode. Silver iodide can form lithium transport channels, activating dead lithium and improving the battery's cycle performance. Simultaneously, Li3N is a good SEI component, which can inhibit dendrite growth, isolate the electrolyte from contact with the anode, reduce active lithium loss, and further improve battery cycle performance. Furthermore, halogens existing in the form of silver halides are resistant to high voltage and not easily oxidized; therefore, high-voltage cathode materials with higher energy density can be selected to achieve a significant improvement in the cycle performance of high-energy-density lithium metal batteries.

The invention discloses a green preparation method of silver nanowires, which comprises the following steps: adding silver powder with the purity of more than or equal to 99.9% into a polyvinylpyrrolidone aqueous solution, stirring for 20-40 minutes, then adding metal halide MXn, uniformly mixing, reacting for 7-9 hours under the oxidation condition, the pH value of 1-3 and the temperature of 70-90 DEG C to obtain silver halide colloid, centrifuging and washing the silver halide colloid to obtain precipitate, and drying to obtain the silver nanowires. The invention discloses a preparation method of silver nanowires, which comprises the following steps: dissolving silver halide in water to obtain a precipitate, dispersing the precipitate in water to obtain a silver halide dispersion liquid, sequentially adding a surfactant aqueous solution and a reducing agent aqueous solution into the silver halide dispersion liquid to obtain a mixed solution, and carrying out sealed reaction on the mixed solution at 100-130 DEG C for 20-24 hours to obtain the silver nanowires. The average diameter of the silver nanowires prepared by the green preparation method is 20-60 nm, the length-diameter ratio is 400-4000, and the silver nanowires are uniform in morphology and good in stability. And the length-diameter ratio is large.

According to the high-temperature-resistant degradable plastic material and the preparation method thereof, the high-temperature-resistant degradable plastic material comprises a plastic matrix layer, the plastic matrix layer comprises a silver halide layer and a polyethylene terephthalate layer arranged on one side of the silver halide layer, a degradation assembly is arranged in the silver halide layer, and a flow equalizing assembly is arranged in the polyethylene terephthalate layer. According to the high-temperature-resistant degradable plastic material and the preparation method thereof, the design is reasonable, the silver halide layer with the degradation assembly is arranged on the surface of the polyethylene terephthalate layer, and the flow equalizing assembly is arranged in the polyethylene terephthalate layer, so that the problem that the degradation function of existing plastic is limited is effectively solved, and the high-temperature-resistant degradable plastic material is suitable for popularization and application. The degradation rate of the plastic in the natural environment is improved, and white pollution is avoided.

An implantable micro-biosensor includes a substrate, a first working electrode, at least one second working electrode, and at least one counter electrode. The first working electrode includes a first sensing section driven by a first potential difference to measure a physiological signal. The second working electrode includes a second sensing section driven by a second potential difference to consume an interfering substance. The counter electrode cooperates with the first working electrode to measure the physiological signal, cooperates with the second working electrode to consume the interfering substance, and selectively cooperates with the first or second working electrode to regenerate silver halide.

The invention belongs to the field of preparation and application of nano materials, and discloses a simple method for preparing small-size silver halide (AgX: X = Cl, Br and I) nano particles. The preparation method comprises the following steps: respectively dropwise adding an ethylene glycol solution of silver nitrate and an ethylene glycol solution of sodium iodide into a stirred oleylamine phase; the small-size silver iodide nanoparticles are prepared by a method for controlling precipitation of silver ions and iodide ions in an oleylamine phase. The method has the main advantages that (1) the process is simple, the operation is convenient, and only three steps of solution preparation, stirring control and centrifugal separation are needed; and (2) the preparation process has good repeatability and controllability, and the average size of the synthesized nanoparticles can be controlled within 10nm. And (3) the prepared silver iodide nanoparticles have the characteristics of large specific surface area, high active sites and the like, and are suitable for preparing photocatalysts, artificial rainfall agents, CT contrast agents and the like.

The invention discloses a copper-doped silver halide material with ultra-wide spectrum luminescence and blue afterglow. The chemical composition general formula of the material is Rb2Ag (1-x) CuxBr3, wherein 0 lt; x is smaller than or equal to 0.5, and Ag + in the crystal is replaced by Cu +. According to the invention, only through single Cu < + > doping, ultra-wideband visible-near infrared (350-1000nm) fluorescence emission is realized in a full-inorganic silver halide compound matrix. Meanwhile, after an excitation light source is turned off, the material shows macroscopic blue (350-600nm) afterglow emission with lasting time up to 320 seconds. The material obtained by the invention is environment-friendly, non-toxic and stable in performance, has efficient ultra-wide spectrum luminescence and ultra-long afterglow performance, can be used as fluorescent powder in the field of display illumination, and can also be used in the fields of encryption anti-counterfeiting, biosensing and the like by virtue of afterglow and near-infrared luminescence performance.

The invention discloses a medical film coating method, and belongs to the technical field of medical film production. The coating method comprises the following steps: coating an inner layer on one side of a film substrate, wherein the thickness of the inner layer is 0.5-1.5 microns; coating a photosensitive layer on one side, far away from the film substrate 1, of the inner layer, wherein the thickness of the photosensitive layer is 13-22 microns; the bottom layer is prepared from the following raw materials in parts by weight: 10 to 20 parts of polyacrylate, 10 to 15 parts of epoxy resin, 3 to 8 parts of silica sol and a proper amount of water; when in use, the polyacrylate, the epoxy resin and the silica sol are respectively weighed and then added into water, and the mixture can be used for coating after being uniformly stirred; the photosensitive layer comprises the following raw materials in parts by weight: 30-45 parts of silver halide, 75-95 parts of gelatin and a proper amount of water; when in use, the silver halide and the gelatin are respectively weighed and then added into water, and the mixture can be used for coating after being uniformly stirred. The medical film provided by the invention is composed of the film substrate, the inner layer, the photosensitive layer and the outer layer, the adhesion between the layers is good, and the medical film has good wear resistance.

The present invention provides a measuring method for extending the service life of a micro biosensor, wherein the micro biosensor is used to measure a physiological signal associated with a physiological parameter of an analyte, and comprises two working electrodes at least partially covered by a chemical reagent and two pairs of electrodes having silver and silver halide, wherein the silver halide has an initial amount. The measuring method comprises the following cyclic steps: applying a measuring voltage to drive one of the two working electrodes during the measuring period to measure the physiological signal and obtain the physiological parameter, and the silver halide of one of the two pairs of electrodes is consumed by a consumption amount; stopping applying the measuring voltage; applying a recharge voltage to drive one of the two pairs of electrodes during the recharge period, so that the silver halide of one of the two pairs of electrodes is recharged by a recharge amount, wherein each time after obtaining a physiological parameter, the sum of each recharge amount and each initial amount minus each consumption amount is controlled within the range of each initial amount plus or minus a specific value.

One aspect of the present invention provides an image forming method, a silver halide photographic light-sensitive material, and a monosheet laminate. The image forming method according to one aspect of the present invention is an image forming method having an exposure step for exposing a direct positive-type silver halide photographic light-sensitive material containing internal latent image-type silver halide grains that are not pre-covered on a support, wherein the exposure step includes an X-ray exposure step for forming a surface negative-type latent image and / or an internal latent image through exposure to X-rays. In addition, the silver halide photographic light-sensitive material according to another aspect of the present invention is a silver halide photographic light-sensitive material in which a surface negative-type latent image is formed by irradiating, with X-rays, a direct positive-type silver halide photographic light-sensitive material containing internal latent image-type silver halide grains that are not pre-covered on a support. The monosheet laminate according to yet another aspect of the present invention is a monosheet laminate in which the silver halide photographic light-sensitive material according to the present invention is used as a photosensitive element.

The present invention relates to a fatty acid separation adsorbent and a preparation method thereof. The preparation method comprises the following steps: 1) mixing a carrier and a solvent, heating, adjusting the pH, and stirring evenly to obtain a carrier solution; dissolving an aminosilane coupling agent in the solvent, stirring evenly, and adding the mixture to the carrier solution; heating and refluxing, washing, filtering, and drying the mixture to obtain a modified carrier material; 2) dissolving the modified carrier material in dioxane, and then adding an AlCl3 ethanol solution containing carbon disulfide to the mixture, and reacting the mixture to obtain a single metal ion complex material Al2O3. 3+ / modified support material. 3) Take the Al 3+ The modified carrier material reacts with silver halide and is then vacuum dried. This fatty acid separation adsorbent has different adsorption and separation capabilities for saturated fatty acids, monounsaturated fatty acids, and polyunsaturated fatty acids, enabling efficient separation of fatty acids and promising industrial application prospects.

Embodiments of the present disclosure are directed to infrared optical lightguides or fibers formed with molten halide material (e.g., silver halide), which can provide low loss broadband transmission of wavelengths from approximately 0.5 microns to approximately 25 microns, and methods for forming such lightguides or other optical devices based on solidifying halide melts. In some embodiments, surfaces of a retaining element may be passivated, e.g., using a silver ion exchange process, before the molten halide material is deposited into the retaining element. In some embodiments, the molten halide material may be solidified in a microgravity environment.

The present application provides a mask element for flexographic printing. The mask element can be used to prepare a mask having a mask image. The mask element may include: a transparent polymeric carrier sheet; a barrier layer on the transparent polymeric carrier sheet, wherein the barrier layer comprises non-crosslinked nitrocellulose; and an imaging layer on the barrier layer, where the imaging layer includes a non-silver halide thermally ablatable material comprising non-crosslinked nitrocellulose, carbon black, and an infrared (IR) dye. In some aspects, the mask element also includes a transparent overcoat layer on the imaging layer. The mask may include: an imaging region in an imaging layer, wherein the imaging region has an optical aperture substantially free of carbon black thereof and non-crosslinked nitrocellulose; and a non-imaged region in the imaged layer, wherein the non-imaged region has non-crosslinked nitrocellulose, carbon black, and an infrared dye.