127 results about "Sol" patented technology

Invention performs an assay to determine presence or quantity of specific analyte in fluid sample. Representative device has two separate flow paths established sequentially in device with a single user activation step. First flow path delivers sample, and conjugate soluble binding reagents to solid phase. If analyte is present, an analyte:conjugate complex is formed and immobilized. Sample volume delivered by first path determined by absorbent capacity of solid phase, and not by amount of sample added to device. User need not measure sample volume. Sample / conjugate mixture is prevented from entering second flow path because capillary and surface energy of second flow path prevent it from being wetted by this mixture. Second flow path allows wash reagent to remove unbound conjugate and sample from solid phase to the absorbant, and optionally deliver detection reagents. Adaptable for many formats including, sandwich immunoassays, colloidal gold, sol particle, heterogeneous generic capture, and competitive assays.

An improved, user-friendly silane / silica sol copolymer hardcoating composition for protecting optical plastic and other substrates (including wood, metals, glass, plastics and most coated articles) from scratching is able to be manufactured at lower costs and to provide much-improved ease of use in transportation, storage, dipbath (or other coating tank) stability, and blush resistance in ordinary cleanroom atmospheres. The silane / silica sol copolymer is formed as a direct reaction product of an acidic silica sol and monomethyltrialkoxysilane, preferably substantially monomethyltriethoxysilane, in ratios of 30:70 to 70:30, most preferably about 40:60. A tail solvent aids blush resistance, reduces internal stress and permits adhesion to unprimed polycarbonate. Optionally, colloidal silica sol dissolved in water-miscible solvent may be reacted in a second stage with acidic aqueous colloidal silica sol earlier silanized with monomethyltrialkoxysilane.

The invention discloses a method for preparing a porous alumina ceramic support body by using a colloidal sol as an addition agent, which comprises the following steps: adopting a low cost method to prepare the colloidal sol; adding the colloidal sol into mixed dry powder on the basis of aluminum oxide aggregate; and performing the processes of pugging, molding, sintering and the like to obtain a multi-channel pipe type or honeycomb type porous alumina ceramic support body. The method uses the colloidal sol as a caking agent, a sintering addition agent, and a performance improver, and makes use of the caking property of the colloidal sol, thus the dosage of organic caking agent can be reduced remarkably to solve the problem of easy cracking of binder removal sintering; and with the fine particles of the colloidal sol as the sintering addition agent, the sintering temperature can be reduced, and the dissolvability of the particles are improved, thus the sintered product does not have glass phase through microscopic analysis. The prior preparation method adopting low melting point glass phase as the sintering addition agent is improved, and the acid resistance, the alkali resistance and the high temperature strength of the porous alumina ceramic support body are improved.

A novel nodular silica sol adapted to use as a polishing material for polishing, for instance, CMP.The nodular silica sol has a ratio of an average particle diameter (r) measured by the dynamic light scattering method versus a particle diameter (r′) converted to that of an equivalent sphere computed from an average specific surface area measured by means of the nitrogen absorption method (r / r′, referred to as “association ratio”) in a range from 1.2 to 10, the particle diameter (r′) in a range from 5 to 200 nm, and the specific surface area in a range from 13 to 550 m2 / g. The nodular silica particles have heterogeneous forms, and contents of Ca and Mg contained in the nodular silica particles are below 1000 ppm against SiO2 respectively.

A device of forming a film from an organic compound material at low cost is provided, using an organic compound material having high light emission efficiency. An organic compound film is formed on a substrate under an inert gas atmosphere by spraying of a colloid solution in which organic compound aggregates are dispersed (this solution is also referred to as a "sol"). Note that the organic compound may be one in which particles are composed of aggregates of several organic compounds within a liquid, and may be one in which a portion of the organic compound is dissolved within a liquid.

A CMP slurry is provided comprising polishing particles, the polishing particle comprising organically modified colloidal silica. Also, a method of preparing a CMP slurry is provided, comprising the steps of: preparing polishing particles comprising organically modified silica; converting the polishing particles into an aqueous state; and adding pure water, a hydrophilic additive and a dispersing agent to the polishing particles. The polishing particles can be synthesized using a sol-gel process. According to the invention, a slurry having excellent polishing properties can be prepared, in which the surface properties of colloidal silica are changed to control the physical properties of the polishing particles and which can ensure a desired CMP removal rate while minimizing the occurrence of scratches.

Methods of preparing an organic sol of particles are provided. Steps include providing a suspension of particles in an aqueous medium; adding a first organic liquid compatible with the aqueous medium to form an admixture; reacting the particles with a first and a second modifying compound; adding a second organic liquid compatible with the liquid portion of the admixture wherein the second organic liquid is different from the first organic liquid; and maintaining the admixture at a temperature and pressure and for a time sufficient to substantially remove the water and the first organic liquid. Also provided are curable film-forming compositions containing sols of particles prepared by the methods of the present invention.

The invention relates to a carbon nanotube-metal composite enhanced copper-based composite material and a preparation method thereof, and belongs to the field of preparation of composite materials. The preparation method comprises the following steps: preparing colloidal sol by using soluble salts containing metallic elements and copper ions and carbon nanotube as raw materials, carrying out spray granulation by using the colloidal sol through a spray dryer so as to obtain nanoscale mixed powder, calcining the mixed powder in an oxygen-free atmosphere so as to obtain black powder, reducing the black powder in a hydrogen atmosphere so as to obtain carbon nanotube-metallic element composite enhanced copper-based powder, carrying out isostatic press moulding on the mixed powder, and then sintering in the hydrogen atmosphere so as to obtain the carbon nanotube-metallic element composite enhanced copper-based composite material, wherein the content of a metallic element X in the composite material is 0.1-2wt%, and the content of the carbon nanotube in the composite material is 0.1-2wt%. The preparation method has the advantages that corresponding carbides can be formed, the problem of reinforcement agglomeration caused by poor interface bonding between reinforcement and a copper matrix is solved, and the copper-based composite material with excellent combination properties can be obtained.

An improved, user-friendly silane / silica sol copolymer hardcoating composition for protecting optical plastic and other substrates (including wood, metals, glass, plastics and most coated articles) from scratching is able to be manufactured at lower costs and to provide much-improved ease of use in transportation, storage, dipbath (or other coating tank) stability, and blush resistance in ordinary cleanroom atmospheres. The silane / silica sol copolymer is formed as a direct reaction product of an acidic silica sol and monomethyltrialkoxysilane, preferably substantially monomethyltriethoxysilane, in ratios of 30:70 to 70:30, most preferably about 40:60. A tail solvent aids blush resistance, reduces internal stress and permits adhesion to unprimed polycarbonate. Optionally, colloidal silica sol dissolved in water-miscible solvent may be reacted in a second stage with acidic aqueous colloidal silica sol earlier silanized with monomethyltrialkoxysilane.

It is an object of the present invention to provide a material which is applied to substrates by an easy and simple process, is applicable to substrates of a wide range and is capable of forming an antifouling film exhibiting excellent antifouling performance, and a substrate with an ink-receiving layer having excellent decoloring property. The titanium-containing silica sol of the invention includes (a) the following fine particles (a1) or the following fine particles (a2) and (b) a dispersion medium: (a1) titania fine particles having a mean particle diameter of 2 to 50 nm and porous silica fine particles having a mean particle diameter of 5 to 100 nm and a specific surface area, as determined by BET method, of not less than 300 m2 / g, or (a2) porous silica fine particles obtained by surface-modifying surfaces of porous silica fine particles having a mean particle diameter of 5 to 100 nm and a specific surface area, as determined by BET method, of not less than 300 m2 / g with a titanate compound.

A composition for chemical mechanical polishing a surface of a substrate having a plurality of ultra high purity sol gel processed colloidal silica particles for chemical mechanical polishing having alkali metals Li, Na, K, Rb, Cs, Fr and a combination thereof, at a total alkali concentration of about 300 ppb or less, with the proviso that the concentration of Na, if present, is less than 200 ppb; and a medium for suspending the particles is provided. Also, provided are methods of chemical mechanical polishing which included a step of contacting a substrate and a composition according to the present invention. The contacting is carried out at a temperature and for a period of time sufficient to planarize the substrate.

The freeze casting process for preparing a green shaped article such as a biocompatible bioceramic prosthesis or implant, comprises: a) providing a substrate at an initial predetermined spacing from one or more liquid dispensing outlets; b) writing a predetermined amount of a liquid formulation from at least one of the outlets onto the substrate, the formulation comprising: 8 to 99.99% by weight of a liquid sol comprising a liquid carrier and from 5 to 50% by weight, based on the weight of the carrier, of colloidally dispersed nanoparticles having a mean particle size in the range 0.25 to 100 nm; 92 to 0% by weight of a mineral powder having a mean particle size greater than 0.1 micron, and 0.01 to 10% by weight of at least one surfactant, freezing point depressant and / or rheology modifier; c) cooling the liquid formulation on the substrate so as to at least partially freeze the carrier on the cooled substrate; d) increasing the spacing between the one or more dispensing outlets and substrate to a further predetermined spacing; e) writing a further predetermined amount of the liquid formulation from at least one of the outlets either on to the substrate or on to deposit formed in steps b) and c) f) cooling the liquid formulation so as to at least partially freeze the liquid carrier on the substrate and / or on the deposit; and g) optionally repeating steps (d), (e) and (f) one or more times.

The invention discloses a rare earth yttrium aluminum garnet emitting material and the air phase manufacturing method that belongs to material technology field. The main feature is that it adopts nm imitated thin diasporite colloidal particle that the nm range is from 5 to 40 as the seed crystal to form a stable sol with the special salt and making spherical particle by air phase method and gaining pure YAG phase emitting material through high temperature treatment. The invention has pure phase, equal size and stable temperature feature.

The sol-gel process of preparing p-type ZnO film includes preparing Ga or N doped ZnO colloid solution, dropping the colloid solution to cleaned Si chip or other substrate, rotating the substrate to make the colloid solution homogeneous, setting the film at the temperature of RM-100 deg.c for a period of time, heat treatment at 240-300 deg.c and heat treatment at 500-900 deg.c in ammonia atmosphere. The preparing process is simple anad low in cost, and can obtain great area film.

It is to provide a sol useful as a component of a hard coating agent to be applied on the surface of a plastic lens or useful for other applications, and its production process. A sol containing modified metal oxide particles which comprise, as nuclei, colloidal particles (A) being stannic oxide particles or composite particles comprising stannic oxide particles and zirconium oxide particles, containing these oxides in a weight ratio of ZrO2:SnO2 of from 0:1 to 0.50:1 and having particle sizes of from 4 to 50 nm, and as a coating covering the surface of the nuclei, alkylamine-containing Sb2O5 colloidal particles, an oligomer thereof or a mixture thereof (B1), or composite colloidal particles comprising diantimony pentaoxide and silica, an oligomer thereof or a mixture thereof (B2), in a weight ratio of (B) / (A) of from 0.01 to 0.50 based on the weights of the metal oxides, and have particle sizes of from 4.5 to 60 nm. A coating composition containing a silicon-containing substance and the above particles. An optical element covered with the coating composition.

The invention discloses a preparation method of a photonic crystal with an inverse opal structure, and belongs to the technical field of the photonic crystal with the inverse opal structure. The preparation method comprises the following technological steps of: firstly adding polymeric microspheres to colloidal sol in proportions, and then dispersing the mixture for 10-60 minutes by using ultrasonic waves so as to form a uniform stable suspension emulsion; transferring the prepared suspended emulsion to a glass container, and vertically placing a clean substrate in the glass container filled with the suspended emulsion; then slantwise placing the glass container on a heating platform, and heating so as to volatilize a solvent; utilizing a binary synergistic effect for ensuring that polymeric microspheres and the colloidal sol grow on the substrate in a self-organizing manner to form a polymer; after ending growth, taking out a sample, and heating in air under an appropriate temperature condition so as to decompose and volatize the polymer; cooling and taking the sample to obtain the photonic crystal with the inverse opal structure, which has good degree of crystallinity and no defects and is large in area.

The invention discloses a preparation method of Gemini cationic TiO2 / SiO2 composite sol and an application method on cotton fabric ultraviolet prevention / antibacterial multifunctional finishing thereof, belonging to the textile chemical technology field. The invention uses the precursors of silicon and titanium, Gemini cationic compound, water, catalyst and solvent to prepare the Gemini cationic TiO2 / SiO2 composite sol for the cotton fabric ultraviolet prevention / antibacterial finishing. The composite sol has the advantages of simple process, easy reaction control, high product purity, low cost, environmental protection and energy-saving performance. The particle size is smaller than 10nm. After the finishing, uniform films are formed on fabrics which can endow the fabrics with good performances of shielding ultraviolet rays and resisting bacteria and has no strong effect on the wearability of the fabrics.

The invention relates to coalmine goaf prevention and control in the field of mining safety, in particular to a method of using phase-changeable sols for preventing spontaneous combustion type fire disasters in coalmine goafs. The method includes: injecting various gaseous sols into a goaf from an underground coalmine, allowing colloidal particles of the sols to deposit on the surface of residual coal so as to react with one another to form a mesh structure by polycondensation, and finally forming a liquid colloid or solid film excellent in stability after phase change, wherein the colloidal particles of the sols include an initiating agent and at least one crosslinking monomer, and the initiating agent is capable of promoting formation of homopolymers or / and copolymers formed by the at least one crosslinking monomer. The method of using the phase-changeable sols for preventing the spontaneous combustion type fire disasters in the coalmine goafs has the advantages that air can be isolated to inhibit oxidation of the residual coal, so that the spontaneous combustion type fire disasters can be prevented; in addition, a phase-changeable sol fire extinguishing system aiming at the method is available for industrialized, standardized and universalized manufacture and is widely applicable to the field of prevention and control of the spontaneous combustion type fire disasters in the coalmine goafs.

The invention relates to a method for preparing yttrium-doped copper ferrite- copper cobalt composite photocatalyst, comprising: adding ferric nitrate, cobalt nitrate and yttrium nitrate into copper nitrate solution, and obtaining a mixed cuprate solution; under the agitation in water bath, dripping citric acid solution into the newly prepared mixed cuprate solution to obtain transparent colloidal sol; continuously heating the transparent colloidal sol in the water bath to obtain gel; transferring the gel into a drying oven and drying at a certain temperature to obtain precursor, and obtaining the yttrium-doped copper ferrite- copper cobalt composite photocatalyst by calcination. The photocatalyst has the best mole ratio of 1: 1 between Fe and Co and the best yttrium-doped quantity being 4% (mole percentage) of Fe, and is good in photocatalysis hydrogen production activity under visible light. The photocatalyst has good application prospect in the aspect of hydrogen production of visible light catalytic material, simple technique, convenient operation, lower cost and long service life.

The present invention discloses a light-enforcing agricultural greenhouse membrane and the production process, belonging to the chemical industry. The light-enforcing agricultural greenhouse membrane comprises polyolefin membrane and optical-efficiency self-assembling hybrid membrane. The greenhouse membrane is characterized in that the formula of the optical-efficiency self-assembling hybrid membrane comprises one of or a plurality of dioxide titanium sol with a particle size less than or equal to 20nm and colloidal solid content less than or equal to 30 percent, silica dioxide sol with a particle size less than or equal to 10nm and colloidal solid content less than or equal to 30 percent, distilled water, acrylate micro-emulsion with particle size less than or equal to 100nm, photosensitizer, coupling agent, cationic surfactant, antistatic agent. The 2 polyolefin membrane material of each 10,000m needs 20kg to 160kg of optical-efficiency self-assembling hybrid membrane. With the formula of the optical-efficiency self-assembling hybrid membrane, an optical-efficiency self-assembling hybrid membrane can be prepared on the surface in the molding process of polyolefin membrane. The light-enforcing agricultural greenhouse membrane of a plurality of effects can be prepared.

The invention relates to a titanium dioxide-organic complex collosol, a preparing method thereof and a combination comprising the collosol is used for forming moderate, high and ultrahigh refractive index coating layers. The preparing method comprises following steps: through adding organic complex in titanium dioxide collosol generated by a collosol-gel reaction, preparing titanium dioxide-organic complex; drying the product; redispersing the product in a spreading solvent. The titanium dioxide-organic complex collosol has monodispersity, excellent compatibility with the organic solvent and storage stability. Specially, titanium dioxide nanometer particles are dispersed with high high concentration and redispersed in the organic solvent to keep transparent, so the titanium dioxide-organic complex collosol can be used for forming paint combination with moderate, high and ultrahigh refractive index coating layers.

A stable modified metal oxide sol which contains from 2 to 50 wt %, as calculated as metal oxides, of particles (c) comprising colloidal particles (a) of a metal oxide having primary particle diameters of from 2 to 60 nm, as nuclei, and a coating material (b) consisting of colloidal particles of an acidic oxide coated on the surface of the particles (a), and which has primary particle diameters of from 2 to 100 nm.

The invention relates to a noble metal sol spray for in-situ detection of explosives through a surface enhancing raman spectrum as well as a preparation method and an application thereof. The noble metal sol spray is a modified sol spray which is formed by modifying the colloidal particle surface of the noble metal sol and then dispersing into the organic solvent. The noble metal sol spray provided by the invention can be used for quickly, sensitively and accurately realizing the in-situ detection for the inorganic explosives and nitro organic explosives on the solid surface.

A process for rapidly forming a ceramic shell mold on an expendable pattern (1) is disclosed. The process entails use of refractory slurries which include a large particle size colloidal silica sol binder. The colloidal silica sol binder has an average particle size of about 40 nanometers, i.e., about 3-4 times larger than colloidal silica sol binders heretofore employed in manufacture of ceramic shell molds. The use of the large particle sols yields unfired ceramic shell molds (20) which have about 40% to about 70% greater unfired strengths compared to ceramic shells made with prior art small particle size silica sols. Prime coats and refractory back-up coats which use the large particle size sol dry about 30% to about 40% faster than prime coats and back-up coats which employ the smaller particle size silica sols of the prior art.

The invention discloses initiative broad-spectrum lasting antibacterial and antiviral medical protective clothing, textile fabric and a preparation method thereof. The preparation method of the textile fabric includes the steps that nano-silver colloidal sol, an inorganic antibacterial agent and an organic antibacterial agent are matched into colloidal sol mixed liquor of a certain concentration;non-woven materials are dipped into the colloidal sol mixed liquor for a certain time; and the antibacterial and antiviral textile fabric can be obtained by means of drying, flattening and winding. The initiative broad-spectrum lasting antibacterial and antiviral medical protective clothing is made of the textile fabric prepared through the method. A traditional metal ion antibacterial and antiviral technology, an organic matter antibacterial and antiviral technology and a photocatalyst antibacterial technology are combined, the lasting and effective broad-spectrum antibacterial and antiviralproperties are given to the medical protective clothing while breathability is not influenced, and the antibacterial rate reaches 99% or above; and moreover, the fast killing effect on influenza viruses (H1N1 and H3N2) is good, the antiviral activity rate reaches 99% or above, and washing reutilization can be achieved.

The invention discloses a preparation method of SiO2 / TiO2 composite sol used for improving inkjet printing fastness, belonging to the textile chemical engineering technology field. The invention uses the precursors of silicon and titanium, solvent, catalyst and water to prepare the composite sol. As the composite sol is used, the dye fixation is convenient and the formed network structure in the composite sol film is denser. The film forming ability of composite sol is better than that of single sol. The dry and wet rubbing fastness, the soaping fastness, the light fastness, and the like of inkjet printing base fabric of coating ink are improved. And with the method used, no metal ions of Cu<2+>, Cr<3+>, and the like can be introduced and no pollution is made to the environment.

There is provided a stable sol of zirconium oxide-tin oxide composite colloidal particles and a method of producing the same, a hard coat material applied for a surface of a plastic lens, and an optical member.The present invention relates to a sol comprising zirconium oxide-tin oxide composite colloidal particles (A), wherein a molar ratio of oxide in the zirconium oxide-tin oxide composite colloidal particles (A) is 0.02-0.4 as SnO2 / ZrO2, and the zirconium oxide-tin oxide composite colloidal particles (A) have a structure in which zirconium oxide colloidal particles and tin oxide colloidal particles are bonded together, and a primary particle diameter of 2-100 nm; and also relays to a coating composition comprising a silicon-containing substance (S) of an organic silicon compound or a hydrolysate thereof, and a sol comprising zirconium oxide-tin oxide composite colloidal particles (A), and an optical member having a cured coating formed from the coating composition.

The invention relates to colloidal antimony oxide powder low in volatility at high temperature and a preparing method thereof. The colloidal antimony oxide powder is made by 1, performing reduction, to be specific, adjusting pH value of antimony pentoxide hydrosol to 7.0 to 8.0 via alkali metal hydroxide, and adding reducing agent to allow partial reduction to obtain antimony oxide sol; 2, removing alkali metal ions, to be specific, removing the alkali metal ions in the antimony oxide sol by ion exchange; 3, performing drying, to be specific, drying the antimony oxide sol with the alkali metal ions removed, to obtain the colloidal antimony oxide powder low in volatility at high temperature. The colloidal antimony oxide powder has lower crystal water content than common colloidal antimony pentoxide powder, the high-temperature burning loss rate of the colloidal antimony pentoxide powder made by the conventional methods is decreased from 16% to 6% below, and high-temperature heating performance is excellent; when heated to 400 DEG C, the colloidal antimony oxide powder never carbonizes or blackens and has stable white appearance; the preparation process is easy to control and has no three wastes.