6022 results about "Chemical bond" patented technology

Improved endoprostheses comprising a delivery configuration and a deployed configuration and methods of manufacture are disclosed. Some embodiments according to the invention comprise woven tubular structures and means for maintaining said structures in their expanded configurations. In one embodiment of the invention, locking elements disposed on one or more fibers maintain said endoprosthesis in its deployed configuration. In alternative embodiments, one or more axial members may maintain said endoprosthesis in its deployed configuration. In yet additional alternative embodiments, a chemical bond or thermocouple may maintain said endoprosthesis in its deployed configuration. Some embodiments according to the invention may comprise erodible material.

Organic luminescent ink (L-ink) is disclosed for use in printing thin films of organic luminescent material. The L-ink is particularly useful in fabricating organic optoelectronic devices, e.g. organic luminescent devices. The L-ink contains at least one organic luminescent material mixed with a solvent and other functional additives to provide the necessary optical, electronic and morphological properties for light-emitting devices (LEDs). The additives play an important role either for enhanced thin film printing or for better performance of the optoelectronic device. The functional additives may be chemically bound to the luminescent compounds or polymers. Luminescent organic compounds, oligomers, or polymers with relatively low solution viscosity, good thin film formability, and good charge transporting properties, are preferred. The L-inks can be cross-linked under certain conditions to enhance thin film properties. The L-ink can be used in various printing methods, such as screen printing, stamp printing, and preferably ink-jet printing (including bubble-jet printing).

The present invention relates to absorbent articles comprising nonwoven fabrics, which are made hydrophilic by polymers chemically bonded to the surface of the nonwoven fabrics.

Moreover, the invention relates to a process for making hydrophilic fibers, which can be formed into a nonwoven fabric.

Methods are disclosed for coating at least a portion of a hydrophobic surface, including the surfaces of plastics or other polymers. Such methods include the use of a first coating layer and/or region that interacts with the hydrophobic surface, although the formation of a chemical bond between the first coating layer and the hydrophobic surface is not required. Subsequent layers may then interact chemically or non-chemically with at least a portion of the first coating layer and/or region. Such coated surfaces may be part of a device or apparatus, including microfluidic devices.

Powerful nanosecond-range lasers using low repetition rate pulsed laser deposition produce numerous macroscopic size particles and droplets, which embed in thin film coatings. This problem has been addressed by lowering the pulse energy, keeping the laser intensity optional for evaporation, so that significant numbers of the macroscopic particles and droplets are no longer present in the evaporated plume. The result is deposition of evaporated plume on a substrate to form thin film of very high surface quality. Preferably, the laser pulses have a repetition rate to produce a continuous flow of evaporated material at the substrate. Pulse-range is typically picosecond and femtosecond and repetition rate kilohertz to hundreds of megahertz. The process may be carried out in the presence of a buffer gas, which may be inert or reactive, and the increased vapour density and therefore the collision frequency between evaporated atoms leads to the formation of nanostructured materials of increasing interest, because of their peculiar structural, electronic and mechanical properties. One of these is carbon nanotubes, which is a new form of carbon belonging to the fullerene (C60) family. Carbon nanotubes are seamless, single or multishell co-axial cylindrical tubules with or without dome caps at the extremities. Typically diameters range from 1 nm to 50 nm with a length >1 mum. The electronic structure may be either metallic or semiconducting without any change in the chemical bonding or adding of dopant. In addition, the materials have application to a wide range of established thin film applications.

A nanoparticles-containing composite porous body according to the present invention includes a porous body having a solid skeleton and pores and nanoparticles of an inorganic substance. The nanoparticles are carried on the solid skeleton without coagulating together or being chemically bonded to the skeleton. The nanoparticles may be coated with organic aggregates and carried as composite particles on the solid skeleton. As the organic aggregates, spherical organic aggregates such as a spherical protein or a dendrimer are preferably used. Also, the organic aggregates may be decomposed and removed if necessary.

The invention discloses a profile control oil-displacement agent for a core-shell type inorganic/organic polymer composite microballoon. A preparation method of the core-shell type inorganic/organic polymer composite microballoon comprises the following steps of carrying out surface modification of inorganic cores of inorganic nano-particles such as silica particles and magnetic particles, and carrying out graft polymerisation by a dispersion polymerization method or an inverse emulsion polymerization method to form polymer shells (such as polyacrylamide cross-linked copolymers) on the surfaces of the inorganic cores. The inorganic components and the organic components bind by chemical bonds so that the core-shell type inorganic/organic polymer composite microballoon has very stale structure. The core-shell type inorganic/organic polymer composite microballoon retains the advantages of polymer microballoons and inorganic particles, and has strong heat-resistant and mineralization-resistant capabilities, high plugging strength and good dilatancy. The core-shell type inorganic/organic polymer composite microballoon can move in rock pores and can plug the rock pores. When a plugging pressure difference is improved to a certain degree, elastic deformation of the core-shell type inorganic/organic polymer composite microballoon can be produced and the deformed core-shell type inorganic/organic polymer composite microballoon sequentially moves to a deep rock stratum part so that a liquid flow direction is changed gradually and a crude oil yield is improved. The profile control oil-displacement agent provided by the invention has a large potential.

The invention discloses a mesoporous Y-type zeolite molecular sieve and a preparation method thereof. The preparation method comprises the following steps of: firstly preparing a Y-type zeolite guiding agent; and then guiding synthesis of the mesoporous Y-type zeolite molecular sieve by using amphiphilic organosilane N,N-dimethyl-N-[3-(trimethoxysilane)propyl]octadecyl ammonium chloride (TPOAC) as a mesoporous template, wherein siloxane group at the organosilane terminal is firstly hydrolyzed into silicon hydroxyl; then the silicon hydroxyl is linked to a skeleton on the zeolite surface through chemical bonds; and other alkyl terminals are polymerized and then participate in pore expansion. According to the method disclosed by the invention, mesoporous zeolites can be synthesized by using a one-step hydrothermal process; the method is simple in preparation process, easy to operate and low in cost and good in connectivity between mesopores and micropores, and facilitates macromolecular diffusion. As the prepared mesoporous zeolite molecular sieve has the mesopores and the micropores, the defect of a single pore structure is avoided; and the mesoporous Y-type zeolite molecular sieve has broad application prospect in the catalytic field, in particular in macromolecular diffusion-limited reaction.

Provided are a graphene structure and a method for producing the same in which graphene can be patterned with high precision, and thereby microfabrication of electronic device elements and electronic devices using graphene is possible and the manufacturing cost can be notably reduced. A resist film is precisely patterned on a substrate, hydrophilized films are formed in openings of the resist film, and then GO is selectively fixed on the portions of the hydrophilized films by a chemical bond utilizing the hydrophilicity of the GO, and the GO is reduced to obtain a graphene structure in which graphene is selectively fixed to only the portions of the hydrophilized films. Thus, the graphene structure is constituted by disposing graphene on a substrate and forming a bond, by hydrophilization treatment, between the hydrophilized portion of the substrate and the graphene and/or between the unhydrophobized portion of the substrate and the graphene.

The present invention provides a fluorescent substance excellent both in quantum efficiency and in temperature characteristics, and also provides a light-emitting device utilizing the fluorescent substance. This fluorescent substance contains an inorganic compound comprising a metal element M, a trivalent element M¹ other than the metal element M, a tetravalent element M² other than the metal element M, and either or both of O and N. In the inorganic compound, the metal element M is partly replaced with a luminescence center element R. The crystal structure of the fluorescent substance is basically the same as Sr₃Al₃Si₁₃O₂N₂₁, but the chemical bond lengths of M¹-N and M²-N are within the range of ±15% based on those of Al—N and Si—N calculated from the lattice constants and atomic coordinates of Sr₃Al₃Si₁₃O₂N₂₁, respectively. The fluorescent substance emits luminescence having a peak in the range of 490 to 580 nm when excited with light of 250 to 500 nm.

Provided are a carbon nanotube structure more excellent in electric conductivity, thermal conductivity, and mechanical strength, and a method of manufacturing the carbon nanotube structure. A carbon nanotube composite structure is characterized by including: a first carbon nanotube structure in which functional groups bonded to plural carbon nanotubes are chemically bonded and mutually cross-linked to construct a network structure; and a second carbon nanotube structure in which functional groups bonded to plural carbon nanotubes are chemically bonded and mutually cross-linked to construct a network structure, the second carbon nanotube structure being combined with the network structure of the first carbon nanotube structure.

The invention discloses a biomacromolecule interpenetrating polymer network hydrogel and a preparation method of the biomacromolecule interpenetrating polymer network hydrogel. The biomacromolecule interpenetrating polymer network hydrogel is formed by crosslinking two kinds of enzymes in a catalysis mode, one is a polysaccharide macromolecule network formed by crosslinking polysaccharide macromolecules with introduced phenolic hydroxyl groups in an oxidation mode as oxidase and hydrogen peroxide catalyze phenolic hydroxyl groups, and the other is a protein or polypeptide macromolecule network formed crosslinking protein or polypeptide containing amino acid residues as transferase catalyzes peptide bonds. The two networks interpenetrate each other and form the novel interpenetrating polymer network hydrogel without bonding of chemical bonds. No chemical crosslinking agent is used in the hydrogel, and the hydrogel has excellent biocompatibility and mechanical property, can be shaped like a dry or wet film, like porous sponge or fibers, and can serve as a contact lens, a medicine release carrier, a scaffold for tissue engineering or materials for tissue repair.

This invention relates to a method, process and apparatus for disinfecting and sterilizing all types of surfaces contaminated with microorganisms and toxic substances to render both inactive. Furthermore, this invention relates to both a method and apparatus for disinfecting and/or sterilizing breathable air and then using this air to protect a confined space from external contamination. The apparatus consists of a new ultra-violet (NUV) source that is more effective than mercury based 254 nm light for destroying DNA of virus, bacteria, spores and cists. It is most effective in breaking chemical bonds in toxic gases and Biotoxins that are useful to terrorists. It is combined with other apparatus that remove particulates and byproducts sometimes produced by the NUV source and maintains positive pressure of the confined space so as to prevent the influx of air from outside the protected zone.

An objective of the invention is to provide a coated conductive particle having superior connection reliability, a method for manufacturing such coated conductive particle, an anisotropic conductive material and a conductive-connection structure. A coated conductive particle comprising a particle having a surface made of conductive metal and an insulating particles to coat the surface of the particle having the surface made of conductive metal there with, wherein the insulating particles are chemically bonded to the particle having the surface made of conductive metal via a functional group (A) having a bonding property to the conductive metal so that a single coating layer is formed.

The invention provides waterproof sealing paste producing chemical crosslinking and physical mortising with cement. The sealing paste is characterized by comprising the following raw materials in parts by weight: 40-60 parts of synthesized rubber latex, 20-30 parts of rubber modified emulsified asphalt, 1-2 parts of a functional additive, 10-30 parts of filler, 0.5-5 parts of plasticizer, 1-3 parts of a thickener and 2-5 parts of water. A principle is that part of molecules in the synthesized rubber and the asphalt are coupled into macromolecules with reactivity under the coupling effect of the functional additive; when the macromolecules are contacted with a basic surface, the non-reactivity molecule sections of the rubber and the asphalt form a physical adsorption effect with the basic surface, and the reactivity molecule sections react with the basic surface to form a chemical bonding effect so as to generate a powerful bonding force; and the bonding effect is difficultly influenced by outside environment factors after the bonding operation is finished. Therefore, the sealing paste is very excellent in waterproof performance.