1935 results about "Colloidal Solution" patented technology

In one aspect, the present invention is directed to a glucose sensing device for implantation within subcutaneous tissue of an animal body. In one embodiment, the glucose sensing device includes a first chamber containing first magnetic particles and a hydrocolloid solution (for example, ConA-dextran hydrocolloid) wherein the first magnetic particles are dispersed in the hydrocolloid solution. In operation, glucose within the animal may enter and exit the first chamber and the hydrocolloid solution changes in response to the presence or concentration of glucose within the first chamber. The sensing device also includes a reference chamber containing second magnetic particles and a reference solution wherein the second magnetic particles are dispersed in the reference solution. The reference solution (for example, oil or alcohol compounds) includes a known or fixed viscosity. The reference solution may also be a hydrocolloid solution (for example, ConA-dextran hydrocolloid). The first and/or second magnetic particles may include amine-terminated particles, at least one rare earth element (for example, neodymium or samarium), and/or a ferromagnetic material.

Ultradispersed ones of primary particles of nanometer-sized carbon are obtained by applying a wet-type milling method and/or a wet dispersion method to an aggregate structure of the primary particles to overcome van der Waals forces, by which forces the primary particles are held together to form the aggregate structure, whereby the ultradispersed primary particles are obtained in a colloidal dispersion on a large-scale basis at low cost without using any additive. In a method of manufacturing the ultradispersed primary particles, the wet-type milling method is carried out in a ball mill, preferably in combination with a high-energy ultrasonic-wave process carried out in a dispersing medium such as pure water, whereby a colloidal solution or slurry with a low-concentration of the primary particles ultradispersed in the dispersing medium is obtained.

The invention discloses a preparation method of a graphene material. The preparation method comprises the following steps of: with graphite carbon as a raw material, adding potassium hypermanganate and concentrated sulfuric acid in batches in different stages to control an oxidation process of graphite; adjusting the pH value of the oxidized solution to obtain graphene oxide colloidal dispersing solutions (GOS) with different concentrations; dropwise adding the GOS on the surface of a carrier or spreading out the GOS on a non-intersolubility liquid/liquid interface and drawing into a grapheneoxide thin-film (GOF); carrying out high-speed centrifugation and drying treatment on the GOS to obtain graphene oxide solid powder (GOP); reducing the GOS by selecting an appropriate reducing agent,and centrifugally drying to obtain reduced graphene solid powder (GRP); dispersing a proper amount of GRP in an organic solvent to prepare a reduced graphene oxide colloidal dispersing solution (GRS); and dropwise adding the GRS on the surface of the carrier or spreading out on the non-intersolubility liquid/liquid interface and drawing into the reduced graphene thin-film (GRF). Various graphene materials prepared by the invention are easy to mutually transform; and the concentration of the colloidal solution and the thickness of the thin-film can be controlled in a certain range.

A metallic colloidal solution (a) includes a water-based dispersion medium that is easy in handling with regard to safety and environment and metallic particles having a uniform particle diameter and being excellent in properties such as conductivity and (b) has properties suitable for various printing methods and ink-applying methods. In addition, an inkjet-use metallic ink incorporating the metallic colloidal solution has properties suitable for the inkjet printing method. The metallic particles are deposited by reducing metallic ions in water and have a primary-particle diameter of at most 200 nm. The dispersion medium is made of a mixed solvent of water and a water-soluble organic solvent. The metallic particles are dispersed in the dispersion medium under the presence of a dispersant having a molecular weight of 200 to 30,000.

The present invention provides a colloidal nanosilver solution which contains nanosilver particles having diameters between 1 nm and 100 nm. The silver content in the colloidal solution is between 0.001% to 0.4% by weight. The colloidal nanosilver solution also contains a gelling agent which includes, but is not limited to, starch or its derivative, cellulose or its derivative, polymer or copolymer of acrylate or acrylate derivative, polyvinyl pyrrolidone, alginic acid, and xanthogenated gel. The present invention also provides a method for making the colloidal nanosilver solution. The colloidal nanosilver solution prepared by this method does not contain any toxic or impure substances.

Carbon nanotubes filled with a suspension or colloidal solution of functional nanoparticles and methods for production of carbon nanotubes loaded with functional nanoparticles are provided.

The present invention discloses a nano silicon dioxide emulsion, its preparation method and application. Said emulsion contains nano silicon dioxide, silane coupling agent, surfactant and water. The described nano silicon dioxide and the described silane coupling agent are combined into a hydrophobic particle, and the described hydrophobic particles are covered with surfactant, and dispersed in the water. Its preparation method includes the following steps: adding water-soluble alcohol into the colloid solution of silicon dioxide in the water, then adding silane coupling agent and adding surfactant and water; another preparation method includes the following steps: adding water-soluble alcohol or aqueous solution of described alcohol into nano silicon dioxide gel, then adding silane coupling agent, surfactant and water. Said emulsion can be directly added into the water-based paint, and can be used for modifying water-based paint and improving various properties of the water-based paint.

The invention discloses a preparation method of graphene oxide/poly(N-isopropylacrylamide) composite hydrogel. The preparation method comprises the steps of: firstly, placing the graphene oxide in water and ultrasonically dispersing the graphene oxide for 30-60 min to obtain a graphene oxide colloidal solution; then adding N-isopropylacrylamide, a cross-linking agent and an initiator 1 in the graphene oxide colloidal solution; stirring for dissolving so as to obtain a mixed solution; then inflating nitrogen in the mixed solution to deoxidize fully, then adding an initiator 2 in the deoxidized mixed solution, mixing uniformly and placing the mixture in a thermostatic water bath at 25+/-1 DEG C so as to obtain the graphene oxide/poly(N-isopropylacrylamide) composite hydrogel. The graphene oxide/poly(N-isopropylacrylamide) composite hydrogel prepared by the method disclosed by the invention has the advantages of good temperature responsiveness and mechanical property and wide application prospect in the biomedical field (such as tissue engineering and drug controlled release).

The invention provides a nano crystal-ligand complex, a preparation method thereof, a printing material and an application of the printing material. The nanocrystal-ligand complex includes nanoparticles and entropy ligands that form surface coordination with the nanoparticles; wherein, the entropy ligands have a branched chain structure, and the total number of main chain skeleton atoms and branch chain skeleton atoms is ≤ 30. In the above-mentioned nanocrystal-ligand complex, the entropy ligand used is different from the traditional linear ligand, which has a branched chain structure, and the total number of main chain skeleton atoms and branch chain skeleton atoms is ≤30. This entropy ligand can effectively inhibit the interaction between nanoparticles and nanoparticles in the solution, and because the C-Cσ bond on it can rotate freely, it can effectively increase the solubility of nanoparticles in the solvent, thereby effectively inhibiting the The coagulation and precipitation of nanoparticles in the solvent greatly improves the stability and processability of the nanoparticle colloidal solution, which is more suitable for application in printing materials.

The invention belongs to the technical field of new energy materials and preparation thereof, and relates to a mesoporous graphite type carbon nitride/nitrogen doped graphene sol nanocomposite and a method for preparing the same. The method comprises the following steps that: graphene oxide and a surfactant are added into deionized water and are ultrasonically mixed uniformly to obtain a colloidal solution; mesoporous graphite type carbon nitride is added to be continuously and ultrasonically treated, and a nitrogen-containing compound is then added to be stirred at constant temperature to form a mixed solution; and hydrothermal reaction and natural cooling are then carried out, ammonia which is adsorbed to a material surface is removed through washing, and the material is dried. The yield of the prepared mesoporous graphite type carbon nitride/nitrogen doped graphene sol nanocomposite is high, and the mesoporous graphite type carbon nitride/nitrogen doped graphene sol nanocomposite has a wide application scope, can be applied to fuel cells, photodegradation reactors and the like. The method has the advantages of simplicity in technology, low cost, high yield, short period and environmental friendliness, and can be suitable for industrially producing the mesoporous graphite type carbon nitride/nitrogen doped graphene sol nanocomposite in a large scale.

A self-assembling photonic crystal method relates to a preparation method of photonic crystal. The invention solves the problems existing in the current method that the photo crystal with large area can not be prepared and the prepared photonic crystal can not be bent. The method comprises the procedures as follows: (1) the surface of a base plate is treated: (2) colloidal solution is prepared: and (3) the base plate is put into a vessel and the colloidal solution is added into the vessel; the colloidal solution volatilizes under the constant temperature of 20 DEG C to 70 DEG C; the photonic crystal is taken out until no substance volatilizes, and the photonic crystal is made. The self-assembling photonic crystal can make the single or double sides of the photonic crystal deposit on the base plate, thus making the photonic crystal deposit on the base plate to a maximum.

The invention discloses a preparation method of a composite metal organic framework material colloidal solution and application thereof in optical coatings. The composite material is formed by compounding silicon sol and a metal organic framework material colloidal solution, and then the composite material is coated on a substrate and cured at high temperature to obtain a film with an anti-reflection function. The film has high transmissivity, and the light transmissivity of the film is obviously improved within the sunlight spectrum, particularly in a visible light range, and moreover, the film has good wear resistance and weather resistance.

The present invention relates to a high-concentration nanoscale silver colloidal solution and the preparing process thereof. The colloidal solution of the present invention comprises a high content of silver particles, i.e. approximately 1.5 wt %. The mean size of the nanoscale silver is less than 10 nm. In the preparing process, silver salt, ionic chelating agent, stabilizing agent, reducing agent, solvent and reaction accelerator are homogeneously mixed together. The increase of reaction temperature by external heat source accelerates completed reaction. By using the specified reaction accelerator and chelating agent and under the operating condition of the present invention, high-density silver colloidal solution is obtained while inhibiting particle aggregation. Therefore, the resulting nanoscale silver colloidal solution contains very small-sized particles and the stability thereof is satisfactory.

The present invention discloses a spongy-like lightweight graphene aerogel preparation method, which comprises: preparing a graphene oxide colloid solution with a concentration of not more than 10 mg/mL; adding a surfactant with a concentration of 0.01-0.1 wt% into the graphene oxide dispersion, and completely dissolving to obtain a foam-like graphene oxide foam suspension; and immediately placing the foam system into liquid nitrogen after completing the foaming, carrying out rapid freezing shaping, carrying out freeze drying, and removing the water to obtain the graphene aerogel material. According to the spongy-like lightweight graphene aerogel of the present invention, the solution system surface tension is reduced, and the dispersion property of the graphene oxide in the solvent is improved while the specific surface area of the aerogel material is further increased so as to improve the adsorption property on dyes, organic solvents and other substances; and the prepared spongy-like lightweight graphene aerogel material has characteristics of simple process, low cost, stable structure, excellent performance, and maximal maintaining of the excellent properties of the graphene material.

The invention provides a composite air purificant containing nanometer mineral matters, which contains 47wt% to 78wt% of attapulgite as a natural mineral, 20wt% to 50wt% of synthetic zeolite molecular sieve as a molecular sieve, 0.5wt% to 5wt% of sodium carbonate or sodium chloride or sodium fluoride or sodium hydrogensulfite as a modifier, 0.5wt% to 5wt% of ammonium bicarbonate or sodium bicarbonate or aluminum sulfate as a foaming agent, 0.5wt% to 2wt% of dodecyldimethylbenzylammonium chloride as a surface active agent, 0.2wt% to 2wt% of nanometer photocatalyst titanium dioxide colloidal solution as a photocatalyst and 0.1wt% to 1wt% of nanometer aircatalyst titanium dioxide colloidal solution as photochemical catalysts. The composite air purificant is prepared by first drying, first pelleting, second drying, second pelleting, third drying, baking and finish product detection and package. The invention has high alternative adsorbability and high decomposition efficiency for organic pollutants in the air.

The preparation process of hollow silica ball includes the following steps: adding alcohol solvent into ammonia water solution of polymer electrolyte in 3-500 g/L concentration, dropping silicon source precursor solution of 1.1-4.4 mol/L concentration in the speed of 0.05-0.2 ml and silicon source precursor/ammonia water volume ratio of 1/15 to 2, reaction in a sealed container at 10-40 deg.c for 2-24 hr, and washing and drying the product, with the ammonia water having concentration of 10-25 wt% and the volume ratio between alcohol solvent and ammonia water being 3 to 25. The preparation process of the present invention is simple and suitable for industrial production, and has mild reaction condition, no environmental pollution and high yield, and the obtained hollow silica ball is loose, has inner diameter of 10-250 nm and water thickness of 10-40 nm, and may be used as medicine carrier and catalyst carrier.

Scintillator material comprising nanoparticles (nanocrystals) comprising lead (Pb), iodine (I), and optionally one or both of oxygen (O) and hydrogen (H) wherein the nanoparticles exhibit room-temperature scintillation under gamma irradiation. The scintillator nanoparticles can comprise Pb₃O₂I₂. The scintillator nanoparticles can comprise PbIOH in generally equiatomic proportions or non-equiatomic variants thereof that exhibit scintillation under gamma irradiation. The scintillator nanoparticles have a particle dimension in the range of about 5 to about 100 nm. Microparticles (microcrystals) also are provided comprising lead (Pb), iodine (I), and optionally one or both of oxygen (O) and hydrogen (H) grown in a nanoparticle colloidal solution over time to a particle dimension greater than 0.1 μm, such as about 2 microns. A heterogeneous scintillator material is provided comprising core/shell nanoparticles having a highly hygroscopic or deliquescent halide-based core activated with trivalent Ln³⁺ or divalent Ln²⁺ lanthanide ions (Ln=La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu) and a stable non-hygroscopic shell thereon. The heterogeneous nanoparticles can comprise highly hygroscopic lanthanide halide (LaBr₃, LuI₃) cores protected with stable non-hygroscopic LaF₃ shells. The heterogeneous nanoparticles can comprise deliquescent alkaline earth halide (SrI₂, BaI₂) cores protected with stable non-hygroscopic (SrF₂, BaF₂) shells.

Particles having a tap density less than about 0.4 g/cm3 are formed by spray drying from a colloidal solution including a carboxylic acid or salt thereof, a phospholipid, a divalent salt and a solvent such as an aqueous-organic solvent. The colloidal solution can also include a therapeutic, prophylactic or diagnostic agent. Preferred carboxylic acids include at least two carboxyl groups. Preferred phospholipids include phosphatidylcholines, phosphatidylethanolamines, phosphatidylglycerols, phophstidylserines, phosphatidylinositols and combinations thereof. The particles are suitable for pulmonary delivery.

The invention discloses a method for preparing a coating having corrosion-resisting and self-cleaning functions, which belongs to the field of new materials. The method comprises the following steps: cleaning and drying the surface of a coated material; utilizing a sol thermo-curing method to prepare an oxide connecting layer on the surface of the coated material substrate; coating a prepared colloidal solution containing nanometer solid grains onto the oxide connecting layer; and after forming a film and curing, coating a material with low surface energy on the surface, thereby obtaining the surface having a self-cleaning function. The surface of a product obtained in the technique of the method is higher in hydrophobic property, is capable of achieving a self-cleaning effect and is ultrahigh in corrosion resistance. The method has the advantages that the demand on equipment is low; the method is free from being limited by the shape of the surface of the coated material; the material substrates, such as ceramics, glass, metal and the like, can be subjected to coating and film-forming treatment according to the method; industrialization is easily realized; and the product after being subjected to the coating and film-forming treatment can be applied to various severe corroding environments and has an ultrahigh application value.

The invention discloses a method for preparing spherical silver nanoparticles, which comprises the following steps: evenly mixing a silver nitrate clearing solution, a reducer clearing solution and a stabilizing agent clearing solution of anhydrous low mass molecule alcohols; stirring the mixture at a temperature of between 70 and 80 DEG C and refluxing the product to obtain a silver nanoparticle colloidal solution; and vaporizing or removing the low mass molecule alcohols, and drying the remaining substance to obtain the spherical silver nanoparticles with the particle size not more than 15 nanometers. A reaction system of the invention has simple process, saves raw materials, reduces links and improves preparation efficiency; in the reaction system, the anhydrous low mass molecule alcohols are taken as solvent to replace the prior water solution to prepare the anhydrous spherical silver nanoparticles; therefore, the invention discloses a method for preparing the anhydrous spherical silver nanoparticles with good dispersibility and stability, which has the advantages of simple process, few varieties of used raw materials and high preparation efficiency.

The invention discloses a slow release fertilizer applicable to water-fertilizer integration. The slow release fertilizer is a nano capsule slow release fertilizer prepared from nutritional ingredients as core materials and a slow soluble film-forming polymer as a capsule wall material. The slow release fertilizer can be evenly dispersed into the water to form a colloidal solution and achieves the slow release and controlled release targets. The invention further provides a preparation method of the slow release fertilizer. The method comprises the following steps: dissolving the slow soluble film-forming polymer into an organic solvent which is not mixed and dissolved with the water; dispersing a core material water solution into the organic solvent to form a water-in-oil W/O emulsion; and adding the W/O emulsion to the water solution containing protective colloid to disperse, so as to form a W/O/W emulsion, and then evaporating a solvent, so as to form the nano capsule. The slow release fertilizer can be evenly dispersed into water to form the colloidal solution, and can be irrigated together with water; and the capsule wall material is a slow soluble film-forming polymer, and can be slowly dissolved into soil to achieve the controlled release target, secondary pollution to the soil is not generated, and the slow release fertilizer has market function value.

A waxy solid having ultrafine particles homogeneously distributed in a mixture of vegetable oil and waxy solid, the oil being present in a major proportion by weight, forms a homogeneous colloidal solution which is then cooled and subjected to high shear to form ultrafine particles of the waxy solid, in situ, in a size range from about 0.1 μm to 10 μm. The resulting stiff gel retains its shape and high viscosity for at least 30 days when confined in a container in an air atmosphere at 40° C. at substantially sea level. The stability of the gel is visually evidenced by a lack of syneresis. The gel is destabilized at a temperature in the range from 52° C. (125° F.) to 100° C. (212° F.).