316results about How to "Stable chemical structure" patented technology

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 spray coating type fire-retardant antistatic polyurethane elastomer and a preparation method thereof. The spray coating type fire-retardant antistatic polyurethane elastomer comprises an A component and a B component, wherein the A component is composed of 40-60 parts of isocyanate and 40-60 parts of phosphorus-containing flame-retardant polyol, and the B component is composed of 0-30 parts of chain extender, 0-30 parts of polyether polyol, 10-75 parts of amine-terminated polyether, 0-30 parts of carbon nanotube slurry, 0-3 parts of pigment and 0-3 parts of assistant. The preparation method comprises the following steps: adding the phosphorus-containing flame-retardant polyol into a reaction kettle, heating up to 110 DEG C, vacuumizing for 3 hours, cooling to 30 DEG C, adding the isocyanate, heating up to 105 DEG C, and reacting for 3 hours to obtain a semi-prepolymer A component; sequentially adding the ingredients of the B component into a stirring tank, stirring uniformly, and grinding the mixture in a sand mill for 2.5 hours to prepare the B component; spray-coating the A component and the B component onto a surface through a high pressure spray coating machine, and quickly curing to form. According to the spray coating type fire-retardant antistatic polyurethane elastomer disclosed by the invention, film forming matters are stable, no fire retardant is separated out and the durability is good; a spray coating type fire-retardant antistatic material prepared by the preparation method disclosed by the invention has both fire resistance and anti-static function, so that the material is suitable for application on flame-retardant and explosion-proof occasions.

The invention relates to a water swelling polyurethane elastomer sealing product material and a preparation method. The material is prepared from the following three components (A), (B) and (C) through polymerization reaction of two steps, the elastomer material has water swelling property, and a main chain structure of material molecules absorbs water, wherein the (A) is hydrophilic polyether type polymer1polyol; the (B) is polyisocyanates; and the (C) is low-molecular polyol and amino chain-extended crosslinker. The molar ratio of the (B) to the (A) in an isocyanate end capping reaction is 1.3 to 2.8; and the molar ratio of a product of the isocyanate end capping reaction of the (A) and the (B) to the (C) in a chain-extended crosslinking reaction is 0.75 to 1.05. In the preparation method for the material, the reaction of the two steps is a reaction process of liquid polymerization, and the production of a product is an elastomer casting-molding process. The material has the characteristics of small mass variation rate and stable physical performance after the material absorbs the water repeatedly to swell, and permanent compression deformation and small stress relaxation.

The invention provides an all-solid-state polyelectrolyte film based on polyvinyl formal or its homolog and a preparation method thereof. Through stepwise reaction of polyvinyl formal or its homolog and boric acid, oxalic acid, and a lithium salt in an organic solvent system, the solid-state polyelectrolyte film with polyvinyl acetal as a main chain and a lithium mono(oxalato)borate structure grafted on a polymer molecular chain can be formed. With low cost and simple operation, the all-solid-state polyelectrolyte film prepared by the invention can realize large-scale production, and has ideal ionic conductivity, electrochemical stability window and mechanical properties. Therefore, the all-solid-state polyelectrolyte film can be used as all-solid-state electrolyte in polymer lithium ion batteries to improve the safety performance of the lithium ion batteries.

To provide a capacitor capable of utilizing carbon nanotube characteristics effectively to obtain excellent electric or mechanical characteristics, and a method of manufacturing the same. The capacitor is characterized by including two opposing electrodes, at least one of the two electrodes being formed from a coating film of a carbon nanotube structure in which plural carbon nanotubes with functional groups bonded constitute a mesh structure by cross-linking the functional groups through chemical bonding. The method of manufacturing a capacitor includes: a coating step for coating a surface of a base body with a solution that contains plural carbon nanotubes with functional groups bonded; and a cross-linking step for forming a carbon nanotube structure layer in which the functional groups are chemically bonded to one another, thereby causing the carbon nanotubes to cross-link to one another and build a mesh structure.

Provided are a gas decomposing unit and an electrode for a fuel cell capable of stably supporting a gas decomposing catalyst. A gas decomposing unit and an electrode for a fuel cell each including: a carbon nanotube structure having a mesh structure in which functional groups bonded to plural carbon nanotubes are chemically bonded to mutually cross-link the plural carbon nanotubes; and a gas decomposing catalyst supported on the carbon nanotube structure. A method of manufacturing a gas decomposing unit characterized by including: an applying step of applying, to the surface of a substrate, a solution containing plural carbon nanotubes to which functional groups are bonded; a cross-linking step of chemically bonding the functional groups to build a mesh structure in which the plural carbon nanotubes mutually cross-link; and a supporting step of forming the carbon nanotube structure supporting a gas decomposing catalyst.

The invention relates to a preparation method of high-throughput graphene oxide/polyimide mixed matrix membrane material. The high-throughput graphene oxide/polyimide mixed matrix membrane material isprepared by the steps of introducing graphene oxide into a polyimide matrix subjected to thermotropic rearrangement reaction through an in-situ method to prepare a composite material membrane, and processing the composite material membrane for at least 0.1h under inert atmosphere. The prepared mixed matrix gas separation membrane material has the characteristics of excellent seepage separation performance and stable chemical structure and can solve the inadequate problems of limited separation performance, poor anti-plasticizing capability, poor temperature tolerance and the like of the existing polymer separation membrane material.

The invention relates to a selenium-rich medicinal herb feed additive. The additive is characterized by comprising the following components: polygonum multiflorum, sophora flavescens, cyrtomium rhizome, coptis, pine needle, epimedium, kudzuvine leaf, sweet wormwood, honeysuckle and cibotium barometz. The selenium rich medicinal herb feed additive is a feed additive prepared by using Hubei Enshi selenium rich medicinal herbs as raw materials; the medicinal herbs are medicaments and natural products and contain multiple minerals and vitamins, so the additive has an effective effect of a feed additive and can become a unique feed additive; various animals freely eat the medicinal herbs in field; and the additive can promote the growth of the animals, prevent and treat diseases, enhance the disease resistance of the animals and condition the physiological functions of the animals.

The invention discloses a nitrogen-doped carbon-coated catalyst as well as a preparation method and application thereof. The invention provides a nitrogen-doped carbon-coated catalyst for preparing halogenated arylamine through catalytic hydrogenation of halogenated nitroaromatic hydrocarbons; the nitrogen-doped carbon-coated catalyst comprises a supported metal catalyst and a coating layer, the supported metal catalyst comprises a carrier and a metal active component, the coating layer is a nitrogen-doped carbon layer, and the thickness of the nitrogen-doped carbon layer is 0.1 nm-10 nm. Themetal active component is G-M, G is one or more of noble metals Pt, Pd, Rh or Ru, and M comprises at least one of metals Fe, Co, Ni, Sn and Mo. The catalyst provided by the invention is applied to preparation of halogenated arylamine through catalytic hydrogenation of halogenated nitroaromatic hydrocarbon; the conversion rate of the halogenated nitrobenzene is as high as 100%, the nitrogen-doped carbon-coated catalyst is quite high in activity and excellent in stability, high-purity halogenated arylamine can be obtained, the selectivity can reach 99.7% or above, dehalogenation is smaller than0.3%, and dehalogenation is effectively inhibited; a dechlorination inhibitor does not need to be added into a reaction system, so that the cost is reduced, the complexity of the reaction system is reduced, and side reactions possibly introduced are reduced.

The invention relates to a transfer printing PP glue and a preparation method thereof. The transfer printing PP glue is prepared from the following raw materials by weight part: 5-40 of chlorinated polypropylene resin, 0-40 of polyolefin adhesion promotion resin, 0-20 of EVA resin, 0-20 of phenolic resin, 0.1-5 of an anti-adhesive additive, and 60-90 of an organic solvent. The preparation method includes: when the raw materials are not 0 at the same time, under room temperature and atmosphere pressure, conducting stirring mixing for 40-120min at a stirring speed of 2000-10000 rpm, thus obtaining the transfer printing PP glue. Compared with the prior art, the preparation method provided by the invention is simple and is safe to operate. The prepared glue has the advantages of good stability, no denaturation after long-term placement, and is good drying property, good leveling property, easy gravure coating, and excellent adhesion to PP substrates and a variety of ink layers and coatings.

The invention belongs to the technical field of catalyst preparation, and particularly relates to a preparation method and application of a supported CuNi bimetallic Cu1Ni1/rGO catalyst. The preparation method of the catalyst comprises the following steps: (1) mixing copper acetylacetonate, nickel acetylacetonate, ferric trichloride, ascorbic acid and oleylamine; (2) adding graphene oxide into deionized water; (3) adding a graphene oxide aqueous solution obtained in step (2) into a material obtained in step (1), and uniformly mixing; (4) heating a material obtained in step (3) to react, stirring, cooling and standing; and (5) centrifuging a reaction solution obtained in step (4), and removing impurities to obtain the supported bimetallic catalyst. The catalyst disclosed by the invention ishigh in catalytic activity, stable in chemical structure and relatively good in conductivity; the raw materials are rich in source, and the catalyst preparation cost is reduced; and the cyclic utilization rate is high.

The invention discloses an efficient light-emitting sulfur selenium tellurium zinc cadmium/zinc sulfide quinary alloy core-shell structure quantum dot material and a preparation method. Liquid paraffin serves as a solvent, powdered sulfur serves as a sulfur source, selenium oxide powder serves as a selenium source, tellurium oxide serves as a tellurium powder source, zinc oxide serves as a zinc source, cadmium oxide serves as a cadmium source, liquid organic amine, liquid organic acid and liquid mercaptan serve as stabilizers, and heating reaction is performed in inert gas atmosphere to prepare an inner core of a sulfur selenium zinc cadmium telluride quinary alloy core. The liquid organic amine serves as a solvent, alkyl sulfhydryl serves as a sulfur source, zinc fatty acid serves as a zinc source, and heating reaction is performed in the inert gas atmosphere to grow a zinc sulfide shell. ZnCdSSeTe/ZnS quinary alloy core-shell structure quantum dots with adjustable light-emitting peakpositions, uniform shapes and sizes and high fluorescence quantum yield are controllably prepared by low-cost reaction raw materials and reaction solvents.

The invention relates to a cleaning agent for a solar panel. The cleaning agent comprises the following components by mass percent: 10 to 30 percent of surface active agent, 10 to 30 percent of solvent, 0.5 to 5 percent of electrostatic resisting agent, 10 to 30 percent of antifreezing agent, 2 to 5 percent of softening agent and 5 to 20 percent of oil removing agent. The solar panel is conventionally cleaned manually and rinsed mechanically at present, and the traditional way for cleaning the solar panel has the weaknesses such as high labor cost, large workload, high risk, complexity in operation, halfway cleaning, short washing period and the like. The cleaning agent for the solar panel is strong in decontamination capacity, anti-electrostatic, wide in environmental applicability, good in stability, low-foam, nondestructive for the glass surface, free from peculiar smell, toxic-free, corrosiveless, inflammable, unexplosive and free from polluting the environment.

The invention discloses a method for preparing tetrahedral light-emitting indium phosphide/zinc sulfide core-casing quantum dots. The method comprises the following steps: preparing high-boiling point tris(dialiphatic amido) phosphine, preparing InP quantum dot cores, preparing InP/ZnS core-casing quantum dots and separating the InP/ZnS core-casing quantum dots. Through the use of the high-boiling point tris(dialiphatic amido) phosphine as a phosphorus source, the price is low, the chemical structure is stable, the reaction is mild and safe, and gas is not produced. All reaction precursors are common chemical reagents and low in toxin and safe to store and use. The luminescent color of the InP/ZnS core-casing quantum dots can be precisely controlled simultaneously by the reaction temperature, the ratio of indium halide to the tris(dialiphatic amido) phosphine, the type of the halide and the reaction time, and high fluorescence quantum yield can be ensured.