1411 results about "Porous composite" patented technology

A porous composite material useful in semiconductor device manufacturing, in which the diameter (or characteristic dimension) of the pores and the pore size distribution (PSD) is controlled in a nanoscale manner and which exhibits improved cohesive strength (or equivalently, improved fracture toughness or reduced brittleness), and increased resistance to water degradation of properties such as stress-corrosion cracking, Cu ingress, and other critical properties is provided. The porous composite material is fabricating utilizing at least one bifunctional organic porogen as a precursor compound

A method for producing hydrogen gas is provided and comprises reducing a metal oxide in a reduction reaction between a carbon-based fuel and a metal oxide to provide a reduced metal or metal oxide having a lower oxidation state, and oxidizing the reduced metal or metal oxide to produce hydrogen and a metal oxide having a higher oxidation state. The metal or metal oxide is provided in the form of a porous composite of a ceramic material containing the metal or metal oxide. The porous composite may comprise either a monolith, pellets, or particles.

The invention is directed toward porous composites for application to a bone defect site to promote new bone growth. The inventive porous composites comprise a biocompatible polymer and a plurality of particles of bone-derived material, inorganic material, bone substitute material or composite material. In certain embodiments, the porous composites are prepared using a method that includes a supercritical fluid (e.g., supercritical carbon dioxide) treatment. The invention also discloses methods of using these composites as bone void fillers.

A porous composite suitable for filling a recess or a through-passing hole in an implant. The composite includes particles A prepared from a bioactive material and particles B prepared from a non-bioactive material or weakly bioactive material, which is sintratable with the bioactive material, such that particles A and particles B have been sintered together to a porous composite. Particles A and particles B are essentially homogeneous in size. Also disclosed is an implant which contains a core and the composite.

The present disclosure is directed toward composite materials comprising high aspect ratio habits of drug crystals which can be partially or fully extending into a substrate, and additionally, can be projecting from a substrate at an angle of about 20° to about 90°. The present disclosure is directed toward medical devices, such as medical balloons, comprising said composite and methods of using and making the same. The described composite can be used for the local treatment of vascular disease. The present disclosure is also directed toward paclitaxel crystals with a hollow acicular habit.

The invention provides a composite filter membrane with a multidimensional pore structure and a preparation method thereof. The composite filter membrane comprises nonwoven base cloth and a porous composite nanofiber layer, wherein the nonwoven base cloth and the porous composite nanofiber layer are composited in a manner of hot rolling, and the porous composite nanofiber layer is prepared from a polymer and an additive. The preparation method comprises the following steps: adding the additive into a spinning solution solvent, carrying out ultrasonic treatment to achieve homodisperse, then adding the polymer, and stirring at room temperature until the solution is clear and transparent. A multiple-nozzle electrostatic spinning device is used for electrostatic spinning, and the obtained porous composite nanofibers are directly deposited on the surface of the nonwoven cloth and are composited through a subsequent hot rolling device. The composite filter membrane combines the advantages of common filter materials and nanofiber filter materials, has a good filtering effect, a simple production process and low production cost and is easy to realize large scale production.

The invention discloses a porous composite diaphragm for a lithium ion secondary battery and a preparation method thereof. The porous composite diaphragm comprises a polyethylene microporous membrane; and single surface or two surfaces of the polyethylene microporous membrane is/are covered with a heat-resistant coating layer containing heat-resistant resin and inorganic non-conductive insulated particles. Due to use of the composite diaphragm, the mechanical performance, the aperture and the porosity of a base layer can be controlled, the thickness, the aperture and the porosity of the coating layer can be similarly controlled. The diaphragm has the advantages of low hole-closing temperature, high diaphragm-breaking temperature and less heat shrinkage; and the diaphragm used for the lithium ion secondary battery has excellent safety performance.

Composites containing a hydrocarbon-soluble well treatment agent may be supplied to a well using a porous particulate. Such well treatment agents may for example inhibit the formation of paraffins, salts, gas hydrates, asphaltenes and/or other deleterious processes such as emulsification (both water-in-oil and oil-in-water). Further, other well treatment agents include foaming agents, oxygen scavengers, biocides and surfactants as well as other agents wherein slow release into the production well is desired.

A method of producing a porous composite metal oxide comprising the steps of: dispersing first metal oxide powder, which is an aggregate of primary particles each with a diameter of not larger than 50 nm, in a dispersion medium by use of microbeads each with a diameter of not larger than 150 μm, thus obtaining first metal oxide particles, which are 1 nm to 50 nm in average particle diameter, and not less than 80% by mass of which are not larger than 75 nm in diameter; dispersing and mixing up, in a dispersion medium, the first metal oxide particles and second metal oxide powder, which is an aggregate of primary particles each with a diameter of not larger than 50 nm, and which is not larger than 200 nm in average particle diameter, thus obtaining a homogeneously-dispersed solution in which the first metal oxide particles and second metal oxide particles are homogeneously dispersed; and drying the homogeneously-dispersed solution, thus obtaining a porous composite metal oxide.

A porous composite comprising a porous layer containing a calcium phosphate ceramic, and a dense layer formed on part of the porous layer and having a smaller average pore size than that of the porous layer. The porous composite can be produced by (1) introducing a slurry containing a calcium phosphate ceramic/collagen composite and collagen into a molding die having a high thermal conductivity, (2) rapidly freezing and drying the slurry in the molding die, to form a porous body comprising a porous layer and a dense layer formed on the porous layer, (3) cross-linking collagen in the porous body, and (4) removing the dense layer except for a portion thereof on a surface coming into contact with a soft tissue when implanted in a human body, so that the porous layer is exposed.

An object of the present invention is to provide a separator for a nonaqueous secondary battery having excellent heat resistance and excellent ion permeation as well as shut-down properties. The first invention is a separator for a nonaqueous secondary battery, comprising a porous composite membrane which includes a substrate comprising a polyolefin microporous membrane and a heat-resistant porous layer comprising a heat-resistant resin, the heat-resistant porous layer being formed on at least one surface of the substrate, wherein the separator is characterized in that the sheet resistance (A) of the substrate, the Gurley value (B) of the substrate, the sheet resistance (C) of the porous composite membrane, and the Gurley value (D) of the porous composite membrane satisfy a specific relationship. The second invention is characterized in that the heat-resistant porous layer has an average pore size of 0.1 to 0.2 μm as measured by mercury intrusion porosimetry. The third invention is characterized in that the heat-resistant resin fibrils have an average fibril diameter of 10 to 80 nm, and the pores in the heat-resistant porous layer have an average pore size of 50 to 250 nm.

The invention discloses a meso-porous composite material, a preparation method thereof, a catalyst ingredient preparation method, and a polyethylene preparation method. The meso-porous composite material comprises a molecular sieve material with a hexagonal tunnel structure and silica gel, the meso-porous composite material is spherical, the pore volume of the meso-porous composite material is 0.5-1.8mL/g, the specific surface area is 200-650m<2>/g, the average particle size is 20-60[mu]m, the apertures are distributed in a double peak manner, two peaks respectively correspond to a first most probable aperture and a second most probable aperture, the first most probable aperture is 1-3nm, and the second most probable aperture is 10-30nm. The meso-porous composite material still keeps an ordered meso-structure after loading. Active components Mg and Ti are loaded on the composite material to prepare a catalyst ingredient, and the catalyst ingredient makes a catalyst keep high catalytic activity in ethylene polymerization and allows polyethylene particle powder to be obtained.

According to the present invention, there are provided processes for preparing a porous composite material comprising a metal and a two-dimensional nanomaterial. In one aspect, the processes comprise the steps of: providing a powder comprising metal particles; heating the powder such that the metal particles fuse to form a porous scaffold; and forming a two-dimensional nanomaterial on a surface of the porous scaffold by chemical vapour deposition (CVD). Also provided are materials obtainable by the present processes, and products comprising said materials.

The present invention discloses the Synthesis and application of MOFs/natural polymers composite beads adsorbents. To overcome the drawback of MOFs, in an embodiment, both novel MOFs/sodium alginate (MOFs/SA) and MOFs/chitosan (MOFs/CS) composite beads were prepared and characterized. Each composite beads include one or more of MIL-101 (Cr), MIL-100 (Cr), MIL-53 (Al), MIL-100 (Al), NH₂-MIL-101 (Al), UIO-66, ZIF-8, ZIF-68, ZIF-67, and ZIF-9-67 nanoparticles. Adsorption of anionic contaminants onto the two composite beads was investigated and compared with pristine sodium alginate beads (SA) and chitosan beads (CS). The novel MOFs/SA beads all exhibit much higher adsorption capacity than SA beads; the novel MOFs/CS beads all exhibit much higher adsorption capacity than CS beads, which indicates that MOFs played a key role in the adsorption of anionic contaminants. The porous composite beads disclosed herein and related methods and devices may be used in adsorption technologies.

The invention relates to a porous grapheme/ MnO2 composite film and a preparation method and application thereof. The preparation method comprises the following steps of (1), providing a ball-shaped formwork and coating the surface of the ball-shaped formwork with a polymer layer; (2) providing graphene oxide solution, evenly mixing a small formwork ball coated with the polymer layer obtained in the step (1) with the graphene oxide solution, performing vacuum filtration, and stripping the composite film from a filter membrane after drying; (3) performing high temperature annealing on the composite film obtained in the step (2) to obtain a film of a porous structure; (4) putting the film obtained in the step (3) into potassium permanganate solution to perform hydrothermal reaction to obtain the porous grapheme/ MnO2 composite film. No any binder or conductive agent is needed to be added to the porous composite film prepared by the method, and the porous composite film is good mechanical property and super capacitive performance, has the advantages of being good in high-rate charge and discharge performance, long in circle life and the like, and can be applied to preparing super-capacitors and improve performance of super-capacitors greatly.

The invention discloses a preparation method of a carbon nanotube-MXene composite three-dimensional porous carbon material. According to the preparation method of the material, based on the hydrophilic property of the MXene material, the MXene material is dispersed in a carbon nanotube stabilizing solution, and then is added into a PVA water solution to form a uniformly dispersed stable system. The three-dimensional porous composite carbon material is obtained through freeze drying and carbonization. According to the preparation method, a carbon nanotube can be inserted into a two-dimensionallayer structure of MXene, so that sheet agglomeration is prevented. The specific surface area is increased, and the ion migration space is enlarged. The improvement of the unit capacity and the cycling stability is facilitated. The problem that an MXene material and a graphene material are not easy to disperse uniformly is solved. The mesoporous and macroporous composite three-dimensional porous carbon material is prepared. The preparation method is simple, green, environment-friendly, low in cost, high in yield and easy for industrial production.

The invention discloses a film for a graphene/porous nickel oxide composite super capacitor. The invention is characterized in that the film is of a disordered nano porous structure, the aperture range is 10 to 350nm, the thickness of the film is 1 to 5 mu m, and the weight ratio of graphene to nickel oxide is (0.5:100) to (2:100). The method for preparing the film comprises the following steps: dissolving graphite oxide sheets and magnesium nitrate into an isopropanol solution so as to form a positively-charged graphite oxide sheet sol, then carrying out electrophoretic deposition on the obtained sol so as to obtain a graphene film; and through taking the graphene film as a deposition carrier, preparing a three-dimensional porous film for the graphene/porous nickel oxide composite super capacitor by using a chemical bath film-coating method. The porous composite thin film prepared by the method has the advantages of good mechanical capacity and super-capacitance property, high-discharge specific capacitance, high-ratio charge-discharge properties, high cycle life and the like, and has wide application prospects in the fields such as electric automobiles, communication, consumer electronics, signal control and the like.

The invention provides a graphene-polyaniline composite material which comprises the following components in percentage by mass: 0.01-99.99% of graphene and 0.01-99.99% of polyaniline. The graphene and the polyaniline are doped to form a composite structure, and the composite structure has a micro or nano porous structure. The invention also provides a preparation method of the graphene-polyaniline composite material. In the graphene-polyaniline composite material, the graphene and the polyaniline are doped to form a porous composite structure, and such a micro or nano porous structure greatly increases the specific area of the composite material. Due to high conductivity and large specific area, the composite material has high specific capacity when being used as an electrode material. The preparation technique is simple and reliable, can effectively lower the technical cost, and has wide application prospects.