37results about "Cellulose substances" patented technology

A composition for preparing a porous interlayer dielectric thin film which includes a saccharide or saccharide derivative, a thermo-stable organic or inorganic matrix precursor, and a solvent for dissolving the two solid components. Also provided is a dielectric thin film having evenly distributed nano-pores with a diameter of less than 50 Å, which is required for semiconductor devices.

Insulating liquid. The liquid includes an ester liquid and an additive to the ester liquid having a lower ionization potential than the ionization potential of the ester liquid. In one aspect, conductive nanoparticles are also added.

The invention discloses dielectric paste with high acid resistance. Glass powder used by the dielectric paste is obtained by tempering Bi-Si-B series glass powder for 20-24 hours at the temperature of 500-600 DEG C; preparing an organic carrier by using lecithin, butyraldoxime, beta-cellulose and the like; and adding chromium sesquioxide, cadmium sesquioxide, titanium dioxide and the like as oxide additives to further enhance the stability of the slurry. High-temperature tempering is added to the binding phase glass powder used by the dielectric paste on the basis of a traditional water quenching process, internal stress generated in the smelting and ball milling processes can be eliminated, and the compactness is further improved; meanwhile, terpilenol is replaced by butyraldoxime in the preparation process of the organic carrier, so the prepared slurry has extremely high acid resistance, can ensure stable breakdown voltage and lower encapsulation change rate, can adapt to a more severe use environment, prolongs the service life, and has obvious economic benefits.

The present invention provides a nonporous highly dielectric film which can improve withstanding voltage, insulating property and dielectric constant, especially can decrease a dielectric loss at high temperatures and can be made thin, and a coating composition for forming the highly dielectric film comprising (A) a vinylidene fluoride resin, (B) a cellulose resin and (C) a solvent.

This invention is related to a reactive nanoparticular cyclodextrin derivative useful as a porogen and a low dielectric matrix, with excellent mechanical properties and uniformly distributed nanopores, manufactured by sol-gel reaction of the above reactive cyclodextrin. Furthemore, this invention also is related to an ultralow dielectric film, with uniformly distributed nanopores, a relatively high porosity of 51%, and a relatively low dielectric constant of 1.6, manufactured by thin-filming of the conventional organic or inorganic silicate precursor by using the above reactive cyclodextrin as a porogen.

The invention discloses an environmental-friendly high-temperature-resistant cable material for a computer. The environmental-friendly high-temperature-resistant cable material is prepared from the following components in parts by weight: 50-80 parts of polytetrafluoroethylene, 0.4-0.9 part of polyphenylene sulfide, 0.5-1.5 parts of polybenzoate, 1-3 parts of rare earth stabilizer, 1-2 parts of coumarone resin, 10-16 parts of modified microcrystalline cellulose, 2-8 parts of nano-diamond particles, 1-2 parts of palm wax, 0.5-1.2 parts of antimonous oxide, 0.5-1.5 parts of phthalate (2-ethyl hexoate) ester, 1-3 parts of maleic anhydride, 1-2 parts of gamma-(quadrol) propyl emthyl dimethoxy silane, 0.5-1.2 parts of acrylonitrile-butadiene-styrol copolymer, 0.5-1.2 parts of benzoyl peroxide and 1-2 parts of butyl titanate. The environmental-friendly high-temperature-resistant cable material for the computer can resist high temperature and is excellent in mechanical property.

The present invention discloses an aluminum-based dielectric paste containing flaky silicon dioxide and a preparation method thereof. The aluminum-based dielectric paste comprises, by mass, 40-70% of low melting-point glass powder, 0-20% (not including 0) of flaky silicon dioxide powder, 20-40% of organic carrier, and 0-3% of colorant. The aluminum-based dielectric paste has the following advantages: (1) the thermal expansion coefficient of low melting-point glass is greater than 16*10 <-6> m/K, so that the low melting-point glass can well match with an aluminum-based plate; the melting point of the low melting-point glass powder is less than 600 DEG C, so that the low melting-point glass powder can be sintered under the melting point of aluminum; (2) according to the addition of flaky silicon dioxide (quartz) powder, the corrosion resistance, oxidation resistance, heat resistance and electrical insulation performance of a dielectric layer are effectively improved; (3) an insulating dielectric layer made of the insulating dielectric paste has good binding force with the aluminum-based plate, high breakdown voltage and good insulation performance. The preparation method comprises the preparation of the low melting-point glass powder, the preparation of the organic carrier and the preparation of the dielectric paste.

The invention provides a cable insulating material and a preparation method thereof. The cable insulating material is prepared from the following components: ethylene-vinyl acetate copolymer, epoxy resin, chloroprene rubber, hydrogenated nitrile rubber, high density polyethylene, modified bentonite, modified nano-crystalline cellulose, modified quick lime, titanium dioxide, zinc oxide, magnesium stearate, dibutyl phthalate, fusing agent, flame retardant, lubricant and antioxidant. The cable material prepared by the invention has excellent mechanical property and insulating property, good tensile resistance and impact resistance, has low water absorption rate and is less likely to be affected with damp, thereby having a good application prospect.

The invention telates to a barrier system for a high voltage device and high voltage device with a barrier system. The barrier system (9) comprises a corrugated board that includes several windings (6). The invention also relates to a high voltage system having the barrier system.

The invention discloses a pressboard. The present invention relates to a cellulose based pressboard for insulation in an electrical power transformer. The pressboard comprises polyvinylamine (PVAm), and polyacrylamide (PAM), in a combined amount of between 0.01% and 20% by weight of the pressboard. The invention also relates to the use of such a pressboard as insulation in a power transformer, to a power transformer comprising such pressboard, as well as to a method of producing the pressboard.

The present invention discloses a slurry adaptive to an aluminum nitride base material and a preparation method thereof. The slurry comprises the following components of mass percents of 30-40% of glass powder, 24-42% of ruthenium oxide powder, 28-37% of organic solvent mixture and 1-3% of auxiliary, and the organic solvent mixture comprises terpilenol, butyl carbitol, butyl carbitol acetat, dibutyl phthalate, tri-n-butyl citrate and ethyl cellulose. The preparation method of the slurry is characterized by, according to the mass percents, obtaining the glass powder, the organic solvent mixture and the ruthenium oxide powder, and carrying out the stirring, three-roller grinding, filtering and deaeration processes to obtain the needed slurry. The slurry adaptive to the aluminum nitride base material of the present invention adopts the glass powder of a low softening point to support the selected organic solvent mixture, thereby being able to reduce the sintering temperature of the slurry. A sintered slurry layer has the excellent performances that the resistance is low, and the refiring resistance change rate is less than 3%. Meanwhile, the slurry does not contain the lead, has an excellent silkscreen performance, and is totally suitable for being used as a large-power density (greater than 80W/cm<2>) heating device.

The invention discloses a formula of an environmental protection material for a cable sheath. A cable comprises the following raw materials in parts by mass: 30-40 parts of ramie fiber,10-20 parts of a stabilizer, 10-20 parts of barium srearate, 10-15 parts of crosslinked polyethylene resin, 10-20 parts of chlorinated paraffin, 20-30 parts of a lubricant, 10-20 parts of calcium carbonate and 10-15 parts of pottery clay. The environmental protection material for the cable sheath has the advantages of good insulating effect, good wear resistance, strong anti-interference performance and the like.

The invention provides a preparation method of a novel flame-retardant cable material. The preparation method comprises the following steps: a, mixing and smelting a thermoplastic polyurethane elastomer, a styrene elastomer, modified nanocrystal cellulose and modified magnesium hydroxide to obtain a material I; b, mixing the material I with an antioxidant, a lubricating agent, a halogen-free intumescent flame retardant, a plasticizer and deionized water, carrying out dispersion treatment, and then heating and stirring to obtain a material II; c, adding and mixing expanded graphite, magnesium stearate, a defoaming agent and a maleic anhydride stem grafting compatilizer into the material II, guiding the mixture into a double screw extrusion machine, and carrying out extrusion pelletization to obtain a material III; and d, drying the material III, and processing and forming the novel flame-retardant cable material. The preparation method provided by the invention is simple, low in cost and excellent in material flame retardant property, and has the advantages of excellent performance such as radiation resistance and insulation performance and excellent mechanical property and machining property.

A biofabrication method for producing cellulose-based materials. The method includes providing active cellulose-producing bacteria such as Gluconacetobacter and culturing media in a container; combining organic additives or inorganic additives with the active cellulose-producing bacteria in the container to produce a cellulose hydrogel matrix composed of entangled bacteria-produced cellulose nanofibers; controlling a concentration of the additives in the cellulose hydrogel matrix; and exposing the cellulose hydrogel matrix in selected thermal environment to create a biofabricated functional material.

The invention discloses a high-performance cable insulating material formula. A high-performance cable insulating material is prepared from, by weight, 30-36 parts of inorganic filler, 18.3-22.6 parts of carbon black, 39-46 parts of a silane coupling agent, 16-20 parts of antioxidant, 10-30 parts of a cross-linking agent, 2.5-3.5 parts of a vulcanizing agent, 20-22 parts of flame retardant, 12-20 parts of oxide, 6-21 parts of an anti-aging agent, 28-39 parts of oxygen indexes, 6-20 parts of borax, 23-30 parts of boric acid, 18-26 parts of cellulose fibers, 9-30 parts of titanium dioxide, 13-26 parts of chlorinated paraffin, 25-32 parts of a lubricating agent and 33-36 parts of compatilizer. The material is reasonable and scientific in formula, good in irradiation resistance and waterproof performance and excellent in mechanical performance, mechanical performance and physical performance of a produced finished cable are higher than those of common rubber, and flame retardance, abrasion resistance, high using safety and long service life are achieved.

The present invention relates to a device comprising a cable and/or a cable accessory, said cable and/or said cable accessory comprising at least one composite layer obtained from a composite composition based on at least one cellulose derivative, at least one organic compound having a boiling point or a decomposition temperature above about 100° C. and at least one cement composition selected from an aluminosilicate geopolymer composition and a magnesium-based composition, as well as to a method of manufacturing such a device.

The invention provides an access data cable. The data cable comprises a data wire and an insulating layer coating the data wire, and the insulating layer comprises the following components: 4-8 partsof methyl cellulose, 8-12 parts of polytetrafluoroethylene, 6-10 parts of a cross-linking agent, 10-25 parts of 1, 3-butadiene, 15-20 parts of styrene, 15-20 parts of an ethylene-vinyl acetate copolymer and 40-65 parts of chlorinated polyethylene. The wear resistance and the insulating property of the network cable by using the insulating layer with the components are remarkably improved, and thebending resistance is improved by 60%.