40results about How to "Control size" patented technology

A process for manufacturing a porous metal-containing material is provided. For example, a composition is provided comprising particles dispersed in at least one solvent, the particles comprising at least one polymer material and at least one metal-based compound. The solvent can be substantially removed from the composition, and the polymer material can be substantially decomposed, thereby converting the solvent-free particles into a porous metal-containing material. In addition, metal-containing materials produced in accordance with the above process and their use in implantable medical devices can be provided.

The present invention provides a flexible multilayer packaging film and packages formed therefrom wherein the films include a first film layer comprising a first biaxially-oriented polymer selected from the group consisting of a polyester, a polyolefin, a polyamide, and a blend thereof and a surface-roughened portion, a second film layer comprising an adhesive, a third film layer comprising a barrier material, a fourth film layer comprising a second biaxially-oriented polymer selected from the group consisting of a polyester, a polyolefin, a polyamide, and a blend thereof and at least one score-line; wherein the packages comprise a tear-initiation area and a directional tear zone.

The present invention relates to a medical device for placement at a predetermined location within a passageway of the human body, and more particularly, relates to a flexible embolization device which may be delivered by a catheter to a pre-selected position within a blood vessel to thereby embolize a blood vessel or a blood vessel defect, such as an aneurysm or fistula. Specifically, the embolization device comprises an elongated coil having a lumen, the coil and lumen being at least partially embedded in an elongated foam member comprising, in some embodiments, a flexible, biodegradable, water insoluble, open, interconnecting-cell foam material having embolic characteristics, and capable of allowing cell proliferation into the open cell foam interior.

The invention relates to a platinum/carbon nanotube catalyst suitable for multiphase asymmetric hydrogenation reaction. Platinum is loaded on a carbon nanotube carrier. A preparation method comprises the following steps of: heating a purified carbon nanotube in nitric acid, washing, filtering, washing by using water until the pH value of filtrate is neutral, drying to obtain the carbon nanotube carrier, soaking in aqueous solution of chloroplatinic acid, and performing ultrasonic treatment at room temperature; and stirring and impregnating a mixture of the carbon nanotube and the aqueous solution of chloroplatinic acid, raising the temperature to 110 DEG C from room temperature, drying at the temperature of 110 DEG C, grinding into fine powder, reducing by using aqueous solution of sodiumformate with heating, filtering, washing by using deionized water and drying. The invention also provides the preparation method of the catalyst and application of the catalyst to the multiphase asymmetric hydrogenation reaction.

The invention relates to a method for preparing a pyramid array on a monocrystalline silicon substrate, and belongs to the technical field of manufacture of photovoltaic and semiconductor devices. The method comprises the following steps of: covering microballons in periodic arrangement on the surface of a monocrystalline silicon piece, and annealing near the glass transition temperature point of the microballoon; in oxygen atmosphere, obtaining a microballoon array in separation arrangement after etching by use of inductive coupling plasma; depositing a metallic titanium membrane on the monocrystalline silicon piece uniformly by a physical vapor deposition manner; and putting a silicon wafer with a masking film into an alkaline solution containing a surfactant for corrosion so as to obtain the pyramid array in order arrangement. The method is simple in process, short in preparation period and mature in technology; and three structures such as a positive pyramid array, an inverted pyramid array and a positive and inverted pyramid combined array can be obtained by a method for preparing a template through selecting and fine turning. The method has wide application value in the fields of photovoltaic, magnetic memory devices, nano photoelectric devices, nano sensors, surface raman enhancement and surface plasma effect and the like.

The invention discloses a preparation method for a metal organic framework-derived tricobalt tetroxide-modified titanium dioxide nanotube array. The method comprises the following steps: firstly performing pretreatment on a titanium sheet substrate material; performing electrochemical treatment on the treated titanium substrate material by using an ethylene glycol solution containing ammonium fluoride and water as an electrolyte, and performing calcination by using a muffle furnace to change a titanium dioxide crystal form; secondly, performing cobalt hydroxide electrodeposition by means of athree-electrode electrochemical workstation and by using cobalt nitrate hexahydrate as an electrolyte, a titanium dioxide nanotube array as a working electrode, a platinum sheet as a negative electrode and silver/silver chloride as a reference electrode; performing hydrothermal treatment on the titanium dioxide nanotube array to form ZIF-67 in situ; and finally, performing secondary calcination byusing a muffle furnace to obtain the ZIF-67-derived porous tricobalt tetroxide-modified titanium dioxide nanotube array. The method disclosed by the invention can effectively improve absorption capacity of TiO2 on visible light, promote separation of electron hole pairs, and improve photocatalytic degradation efficiency of organic pollutants.

The invention belongs to the preparation field of the anode material of a lithium ion battery, and in particular relates to a method for preparing metal oxide electrode material with a nanometer structure by utilizing the in-situ synthesis method. The internal structure and the dimension of a hollow micro-sphere obtained are controlled through adjusting the pH value of a system by utilizing hydrochloric acid. Raw materials in the invention are common and are easy to obtain; an organic solvent is not required during the preparation process; the preparation process is simple; the synthesis of template materials and the participation of a surface active agent are not required during the synthetic process; the requirements to the device are low, the time consumption is less and the preparation process is simple; and a main by-product during the preparation process is water and carbon dioxide and is environment-friendly. The raw materials used in the invention are common; and the preparation conditions are not restricted by areas. The hollow tin dioxide micro-spheres have higher application prospect in the filed of electrode material, catalyst carriers and the like. The method has the advantages of cheap and easily obtained raw materials, simple preparation process, and unrestricted preparation conditions by areas, and is suitable for massive industrial production.

A fabric membrane texture and manufacturing method thereof explores a texture of fabric membrane comprising of 3D fabric. An upper and a lower fiber texture layers of the 3D fabric membrane are stretched to build up an air sandwich through plural middle connecting fibers. The 3D fabric enables to execute the functions of anti-bump, thermal insulating, thermal conductivity, air permeability and elastic strength. Additionally, a polymer membrane is used to adhere to at least one of the 3D fabric to build up a better function of shielding, insulating, or the capacity of ambiance impedance. Besides, this polymer membrane adheres to the 3D fabric using the process of low-pressure fixation that is applied to the product enables to obtain the better distance of spacer.

Disclosed herein is a method for synthesizing a nanoparticle using a carbene derivative. More specifically, provided is a method for synthesizing a nanoparticle by adding one or more precursors to an organic solvent to grow a crystal, wherein a specific carbene derivative is used as the precursor.

Disclosed is a method of manufacturing a porous polymer membrane, including forming pores by applying water pressure to a polymer membrane composed of a polymer and a metal salt, wherein the porous polymer membrane has properties suitable for use as a separator for a secondary battery.

The invention discloses a high-precision micro-nano size two-dimensional material electrode preparation method. The high-precision micro-nano size two-dimensional material electrode preparation methodcomprises the steps of: transferring a two-dimensional material to a silicon substrate provided with a preset electrode; subjecting the silicon substrate to observation and photographing under a microscope; performing image processing on a photographed image on image processing software; opening the processed image in layout software, and drawing electrodes as required; and preparing the electrodes by means of electron beam exposure. The high-precision micro-nano size two-dimensional material electrode preparation method is low in cost and high in efficiency, draws different electrode patterns on the layout processing software according to different requirements, efficiently controls the size and shape of the electrodes, and is wide in application range.

Disclosed is a process for preparing polyurethane particulate and polyurethane particulate prepared therefrom. The polyurethane particulate has properties such that it is easy to control to a spherical form, the polyurethane particulate can be prepared in a desired particle size, the color thereof is stably exhibited, a washing process thereof is easy because almost no foam is generated in the washing process, and the preparation cost can be lowered because the particles do not lump and a separate grinding process is not needed, by using an inorganic suspension stabilizer in the manufacture process of the polyurethane particulate.

The invention belongs to the technical field of molecular sieve preparation, and relates to an SSZ-13 molecular sieve, a method for regulating and controlling the crystal morphology of the SSZ-13 molecular sieve and application of the SSZ-13 molecular In order to solve the technical problems that the SSZ-13 molecular sieve is large in particle size and uneven in particle size distribution due to the fact that the SSZ-13 molecular sieve morphology control technology is difficult to control in the prior art, the method for controlling the SSZ-13 molecular sieve crystal morphology is provided, a silicon source, an aluminum source, alkali and a structure-directing agent are added into pure water to be mixed evenly, then a crystal morphology control agent is added for further treatment, and the SSZ-13 molecular sieve crystal morphology is obtained. According to the method, the crystal morphology and size of the SSZ-13 molecular sieve can be effectively controlled, the SSZ-13 molecular sieve of a cubic, polyhedral or spherical crystal can be prepared, the grain size of the crystal is small and can be adjusted within a certain range, and the grain size distribution is uniform. When being used as an SCR (selective catalytic reduction) denitration catalyst to be applied to the field of automobile exhaust treatment, the catalyst shows high denitration catalytic performance, high hydrothermal aging stability and wider effective working temperature range.