768 results about "Thermal methods" patented technology

Various methods are provided for metathesizing a feedstock. In one aspect, a method includes providing a feedstock comprising a natural oil, heating the feedstock to a temperature greater than 100° C. in the absence of oxygen, holding the feedstock at the temperature for a time sufficient to diminish catalyst poisons in the feedstock, and, following the heating and holding, combining a metathesis catalyst with the feedstock under conditions sufficient to metathesize the feedstock.

The invention provides a method for preparing a titanium dioxide nano belt, belonging to the nano material technical field. The prior methods for preparing the titanium dioxide nano belt comprise the hydro-thermal method and the combination method of the sol-gel method and the hydro-thermal method. The prior electrostatic spinning method is applied to the preparation of nano fibers. The invention comprises three steps that: 1. a spinning solution is prepared; the mixture of polymethylmethacrylate and vinylpyrrolidone is used as a macromolecule template, and the mixture of chloroform and N,N-dimethylformamide is used as a solvent; 2. a titanium alkoxide/ macromolecule template compound nano belt is prepared; the electrostatic spinning method is used, and the technical parameters are as follows: the voltage is between 15 and 25kV and the curing distance is between 15 and 30cm; 3. a TiO2 nano belt is prepared; the heat treatment method is used, and the technical parameters are as follows: the rate of temperature rise is between 0.5 and 2 DEG C/min and the heat preservation time at the temperature of between 500 and 900 DEG C is between 10 and 15h; for the TiO2 nano belt prepared, the width is between 5 and 15mu m, the thickness is between 30 and 60nm and the length is more than 200mu m; the TiO2 nano belt comprises a pure phase anatase type TiO2 nano belt and a pure phase rutile type TiO2 nano belt.

The invention has a grain structure with an outer shell and several inner cores. The grain size is from 100 nanometers to 100 microns. The inner cores are compound grain that includes active substance and conducting additive. The outer shell is a carbon layer. The active substance takes 20-95wt% of total cathode active material, and is mixture of one or several transition metallic compound selected from silicon and lithium storage whose thermodynamic equilibrium potential is less than 1.5v. The cathode material can be made by using mechanical process or thermal method, and can be directly used as cathode material or used with other existing cathode material.

Methods for forming a rib on a cannula for cooperation with a safety cover which securably and reliably locks the tip of a cannula in an interior chamber within the safety cover. The cover comprises an elongate body having the interior chamber and an axial through hole which extends along the entire length of the body, through the interior chamber and through which the cannula is slidably received. Displacing elements are positioned within the interior chamber, each of which includes a hole for receiving the cannula therethrough, and which displaces upon retraction of the tip of the cannula, thereby preventing subsequent advancement of the cannula tip. The cannula includes a thickened rib adjacent to the tip, and the safety cover should correspondingly include an annular section in the rear portion thereof. The through hole extending through the rear portion has a diameter which is smaller than the thickened rib of the cannula whereby the cannula tip may not be retracted from the safety cover. The rib is formed by a thermal method in which a sleeve is heated to expand its inside diameter to allow the sleeve to be slid onto the cannula. The sleeve is then cooled to room temperature so that the inside diameter contracts to attach the sleeve to the cannula. In another method, a sleeve is placed on the cannula and crimped at the desired location.

A non-contact acousto-thermal method and apparatus are provided for detection of incipient damage in materials. The apparatus utilizes an ultrasonic horn which receives an acoustic wave generated by an ultrasonic transducer energized by an RF pulse. The ultrasonic horn is placed at a distance from the sample to be tested with sufficient gap so that when excited, the face of the ultrasonic horn does not come into contact with the sample. An IR camera is placed at a distance from the opposite side of the sample. The acoustic wave is amplified by the ultrasonic horn, and the interaction between the sample and the acoustic wave produces changes in the temperature of the sample in the region of interaction during acoustic excitation such that the temperature of the material rapidly increases. The temperature-time profile is captured by the IR camera and may be analyzed by a data acquisition unit.

The invention provides a multifunctional nuclear shell structure drug carrier material and a preparation method thereof; the preparation method comprises the following steps: step one, adopting a solvent-thermal method for preparing monodispersed ferroferric oxide magnetic nanoparticles with grain diameter of about 60nm as ferromagnetic nuclear material of the nuclear shell structure; step two, adopting a sol-gel method for cladding an imporous silicon dioxide layer and a meso-porous layer outside ferromagnetic nucleus in sequence; step three, adopting the sol-gel method for loading a layer ofup-conversion fluorescent material NaYF4: Yb, Er on the material obtained in the step two, wherein the molar concentration of Yb occupies 17% of Y concentration, and the molar concentration of Er occupies 3% of Y concentration. In the invention, an inertia SiO2 layer is designed between the magnetic nucleus and post-functionalized rare earth luminescent material for separating magnetic material from a rare earth luminescent layer so as to prevent fluorescent quenching; up-conversion fluorescent powder with higher fluorescent efficiency is used as fluorescent material; and the sol-gel method with mild reaction condition and uniform dispersion is adopted for forming the nuclear shell structure.

The invention relates to a preparing method of a simple substance bismuth/bismuth compound nanocomposite with oxygen vacancies. The method includes the following steps that a certain amount of bismuth nitrate pentahydrate and precursors are added into ethylene glycol, centrifugal washing is performed on obtained products after a solvent thermal condition reaction so that residual impurities can be removed, drying and cooling are performed, and then the simple substance bismuth/bismuth compound nanocomposite with the oxygen vacancies can be obtained. The method has the advantages that firstly, the method is universally applicable; secondly, the ethylene glycol serves as a solvent and a reducing agent, the oxygen vacancies and simple substance bismuth are produced through weak reducibility of the ethylene glycol, other reducing agents do not need to be added, and the defect that control is difficult because other reducing agents need to be added is avoided; thirdly, the simple substance bismuth/bismuth compound nanocomposite with the oxygen vacancies can be synthesized and is uniform in size; fourthly, a solvent thermal method is adopted, the synthesizing technology is simple, production cost is effectively reduced, and large-scale production of products can be achieved.

The invention provides a method for preparing gold and silver nanoparticles with a hydro-thermal method. The method comprises the following step of: reducing metal ions into corresponding metal nanoparticles by taking citric acid as a reducing agent under a hydro-thermal condition. The method has a simple process and low cost; and the prepared gold and silver nanoparticles are crystalline and have high purities and controllable particle diameters. The method can be applied to the fields such as chemical catalysis, cosmetics and biology and the like.

A method and composition for generation of a microbubble from a nanoparticle through a non-thermal method, preferably featuring nucleation.

The invention provides a sol-solvent thermal method for synthesizing a nanocrystalline oxide powder. The method comprises the following: (1) a step of preparation of inorganic salt mother liquids, during which the inorganic salt taken as a material is dissolved in an organic liquid medium or water to prepare a mother liquid of the inorganic salt with definite concentration; (2) a step of preparation of a precipitation reactant liquid, during which alkali is dissolved in an organic liquid medium or water, proper quantity of surfactants are added to prepare the precipitation reactant liquid with definite concentration; (3) a step of preparation of sols, during which, at a certain temperature, while stirring, the prepared reactant liquid is slowly added in the prepared mother liquid of the inorganic salt, the reactant liquid and the mother liquid of the inorganic salt are kept reacting for a period of time after adding the reactant liquids in the mother liquid of the inorganic salt, and the transparent sols are obtained; and (4) a step of solvent thermal reaction of the sols, during which the prepared sols are put in a reaction kettle and reacted for a period of time under a certain temperature and pressure, the products obtained are subjected to filtering, washing and drying, and the nanocrystalline oxide powder is obtained.

The present invention discloses a trinickel disulfide film electrode directly grown on a foam nickel substrate and a preparation method thereof. The foam nickel is used as the substrate and a nickel source, thiourea is used as a vulcanizing agent, and glycol is used as a solvent. The trinickel disulfide film electrode directly grown on a surface of the foam nickel is obtained through a simple solvent thermal method. The preparation method has the advantages of simple process and low costs, and is applicable to large-scale industrial production. The present invention further discloses application of the trinickel disulfide electrode. The trinickel disulfide film electrode has a porous nanometer structure, so that a material and an electrolyte can contact fully. The trinickel disulfide grows on the nickel source, that is, the foam nickel, and is firmly combined with the substrate, so that the electric charge can be transferred rapidly. The prepared trinickel disulfide has high rate performance and excellent circulation stability, and is an ideal super capacitor electrode material.

The invention discloses a hydro-thermal synthesis method for a copper-zinc-tin-sulfur photoelectric material, belonging to the field of preparation of inorganic nano materials. The method comprises the following steps of: dissolving a zinc salt, a tin salt and a cupric salt into a solvent in the molar ratio (0.5-6):(0.3-1):(0.5-2), adding a sulfur-containing compound of which the mole number is 1-4 times of the total mole number of the metal salts and 0-1 millimole of surfactant and reacting at 150-220 DEG C for 5-48 hours; and centrifuging and drying to obtain copper-zinc-tin-sulfur photoelectric material powder. In the method, tetragonal-phase copper-zinc-tin-sulfur photoelectric material powder and orthogonal-phase copper-zinc-tin-sulfur photoelectric material powder are synthesized respectively with a hydro-thermal method and an ethylene diamine-assisted hydro-thermal method; and the method is easy to operate, has high repeatability and low cost, and is easy for realizing mass production.

The invention discloses hydrophobic water-based fluorescent polyurethane paint and a preparation method thereof and relates to fluorescent materials and preparation methods thereof. The hydrophobic water-based fluorescent polyurethane paint is transparent water-based fluorescent type polyurethane emulsion and composed of polyurethane phases and inorganic fluorescent quantum dots. The preparation method of the paint comprises the steps that a self-emulsifying method is adopted, diisocyanate, dihydric alcohol, hydrophilic chain extenders, siloxane, fluorine-containing acrylic resin and the like are selected as raw materials for preparing water-based polyurethane emulsion which is high in transparency and good in hardness, then a hydro-thermal method is adopted for preparing CdTe quantum dot aqueous solutions different in grain diameter, the polyurethane emulsion is mixed with the different CdTe quantum dot solutions according to different proportions, the fluorescent type water-based polyurethane emulsion is obtained, finally cross-linking agents are added for conducting paint film curing, and the water-based fluorescent type polyurethane paint high in coating performance is obtained. According to the hydrophobic water-based fluorescent polyurethane paint and the preparation method thereof, through the design for polyurethane and adjustment on the percentage of the added quantum dots, a series of fluorescent paint are obtained, and the paint is short in drying time, excellent in hydrophobic performance high in hardness and great in cohesiveness with a substrate.

The invention relates to a preparation method of a bore diameter adjustable hierarchical pore metal organic skeleton nanometer material. The preparation method comprises the following steps: synthesizing terephthalic acid with a zircon salt at the existence of a conditioning agent through a solvent thermal method to form a micropore zirconium-based metal organic skeleton; activating the microporezirconium-based metal organic skeleton with a low boiling point solvent and then drying to obtain an activated micropore zirconium-based metal organic skeleton; and dispersing the activated microporezirconium-based metal organic skeleton into 0.8 to 5.6 mol/L of monocarboxylic acid at the temperature of 25 to 180 DEG C for etching so as to obtain the hierarchical pore metal organic skeleton nanometer material. The invention also relates to the obtained bore diameter adjustable hierarchical pore metal organic skeleton nanometer material and application thereof. In short, according to the preparation method in the invention, a part of micropores is retained in the process that hierarchical pores are formed through etching of monocarboxylic acid, so that the obtained hierarchical pore metalorganic skeleton has chemical stability and heat stability similar to those of an original micropore skeleton.

The present invention discloses a preparation method of a [Beta]-Ga2O3 nano array. The method comprises: employing a water bath method to prepare a GaOOH seed layer, employing a hydro-thermal method to prepare a GaOOH nano array on the seed layer, and finally obtaining a [Beta]-Ga2O3 nano array through thermal annealing. The preparation method of the [Beta]-Ga2O3 nano array is a green chemistry method and employs the chemical method seed layer and the nano array, the array is neatly arranged, the dimension is uniform, the preparation method is simple and low in cost and easy to popularize so as to facilitate large-scale preparation, the GaOOH seed layer is prepared, and a substrate is not limited and can be quartz, silicon, a transparent conductive substrate (ITO or FTO), sapphire (C-AL2O3) and the like so as to facilitate different applications.

The invention provides a preheating method and device suitable for powder laying type additive manufacturing, and belongs to the technical field of additive manufacturing. A movable type plane heating plate capable of covering a whole powder bed is arranged over the powder bed, the mounting height of the plane heating plate is slightly larger than a powder laying device, in the powder laying process, the powder bed and parts are preheated, after powder laying is finished, a plane light source is closed and put away, and the phenomenon that in the machining process, the plane heating plate blocks a high-energy beam is avoided. In the heating process, a temperature measuring sensor is used for monitoring the temperature of the powder bed in real time, a control system is adopted to implement feedback control over preheating of the powder bed according to the temperature monitoring result, full-breadth covering type heating is adopted, and the powder bed and formed parts are subject to high-temperature, efficient and unifier preheating. The invention further provides the device achieving the above method. The method is wide in application material and high in expansibility and is particularly suitable for powder laying type additive manufacturing of multiple large-breadth high-energy beams.

The invention relates to a BiOXs pholocatalyst, a grapheme-compounded BiOXs pholocatalyst and a preparation method thereof and relates to the field of photocatalytic materials. According to the invention, the BiOXs pholocatalyst is prepared by utilizing a solvent thermal method, so that the BiOXs pholocatalyst has excellent photocatalytic performances and is especially capable of efficiently degrading organic pollutants under visible light. Photocatalytic performances of the BiOXs pholocatalyst can be further improved by compounding with grapheme in-situ. The BiOXs pholocatalyst, the grapheme-compounded BiOXs pholocatalyst and the preparation method have the advantages of simple manufacturing process, simplicity in operation, low manufacturing cost, small pollution and one-step compounding process.