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5210results about How to "Convenient source" patented technology

Alicyclic-containing polyimide film and preparation method thereof

The invention relates to an alicyclic-containing polyimide film. The molecular structure general formula of the film is the right formula, wherein, -CA- is a bivalence connection group of an alicyclic dibasic primary amine, -Ar- is a bivalence connection group of an aromatic dibasic primary amine, and -R- is a bivalence connection group of an aromatic dibasic estolide. The preparation thereof includes: the alicyclic dibasic primary amine and the aromatic dibasic primary amine are dissolved in non-proton organic solvent with strong polarity, the aromatic dibasic estolide is added, the non-proton organic solvent with strong polarity is used for regulating the viscosity of the alicyclic-containing polyamic acid resin solution after reaction for 1-3 hours, forming is carried out in a curtain coating machine, and dehydration fever imidization, cooling and demoulding are carried out so as to obtain the film. The preparation method has mild reaction condition and low cost and is environmentally friendly; and meanwhile, the alicyclic-containing polyimide film has excellent mechanic property and heat resistant property and low water absorption, and the visible light transmission thereof is as high as more than 97%. The film has good application prospect in the fields of optical waveguide material, photorefractive material and photoelectric material in optical communication field and direct action membrane material in the liquid crystal display field and the like.
Owner:DONGHUA UNIV

Full aromatic fluorine containing transparent polyimide film and preparation method thereof

The invention relates to a full aromatic fluorine containing transparent polyimide film. Structural formula of molecule thereof is shown above, wherein -R1 is a divalent residue of fluorine containing aromatic binary primary amine, and -R2 is a divalent connecting group of aromatic binary anhydride molecule. The preparation method thereof comprises steps of adding the fluorine containing aromatic binary primary amine and strongly polar non-protonic organic solvent into a polymerizing bottle, stirring at room temperature, after being completely dissolved, adding the aromatic binary anhydride, stirring, after 3 hours reaction, obtaining transparent and thick fluorine containing aromatic polyamide acid resin solution having homogeneous phase; and using the strongly polar non-protonic organic solvent to regulate viscosity of the fluorine containing aromatic polyamide acid resin solution, forming film, heating, carrying out dehydrating hot-imidization reaction, cooling, demoulding, thus obtaining the full aromatic fluorine containing transparent polyimide film. The preparation method has mild reaction condition, simple operation and low cost and is environment friendly. The full aromatic fluorine containing transparent polyimide film has excellent mechanical property and heat tolerance and visible light transmission thereof is up to 95%.
Owner:DONGHUA UNIV

Preparation method for high strength macro graphene conductive fiber

The invention discloses a preparation method for high strength macro graphene conductive fiber. According to the method, graphite is oxidized to obtain a graphene oxide; the graphene oxide is dispersed in water or a polar organic solvent to prepare a spinning liquid sol with the mass concentration of 1-20%; the spinning liquid sol is transferred to a spinning device; the spinning liquid is continuously extruded from a spinning head capillary at a uniform speed; the extruded spinning liquid enters a solidification liquid; the solidified primary fiber is collected by using a polytetrafluoroethylene roller; a drying treatment is performed to obtain the graphene oxide fiber; the graphene oxide fiber is subjected to chemical reduction to obtain the graphene fiber. According to the present invention, the spinning process is simple; the operation is performed at the room temperature; no strong corrosive reagent is used; the process has the characteristics of green environmental protection; the prepared graphene fiber has characteristics of good conductivity, excellent mechanical property and good toughness, can be woven into the pure graphene fiber cloth, can further be woven into various fabrics with other fibers, and can further be added to the polymer as the conduction enhancing additive and the like; the prepared graphene fiber can replace the carbon fiber to use in a plurality of fields.
Owner:杭州德烯科技集团有限公司

Method for preparing high-strength conductive graphene fiber by large-size graphene oxide sheet

The invention discloses a method for preparing high-strength conductive graphene fiber by a large-size graphene oxide sheet. The method comprises the steps of: oxidizing expanded graphite and obtaining graphene oxide; dispersing the graphene oxide into water, carrying out centrifugal classification treatment on the dispersed graphene oxide, and obtaining the large-size even graphene oxide sheet; and finally, dispersing the graphene oxide into water or polar organic solvent, preparing spinning solution liquid crystal sol with the mass concentration of 1-20%, transferring the spinning solution liquid crystal sol into a spinning device, continuously squeezing spinning solution out from a spinning head capillary tube at the uniform velocity, leading the squeezed spinning solution into solidification liquid, drying the solidified primary fiber, obtaining graphene oxide fiber, and then obtaining the graphene fiber by chemical reduction. A spinning technology is simple; and the obtained graphene fiber is good in electrical conductivity, excellent in mechanical property and better in toughness, can be woven into pure-graphene fiber cloth, and also can be woven with other fibers in a blending way so as to make various functional fabrics, so that the high-strength conductive graphene fiber can be used for replacing carbon fiber in a plurality of fields.
Owner:杭州德烯科技集团有限公司

Intelligent power supply station storeroom management system and method based on internet of things

The invention provides an intelligent power supply station storeroom management system and method based on the internet of things. The intelligent power supply station storeroom management system comprises a master control terminal, a background management server connected to the master control terminal, an intelligent security tool cabinet management sub system capable of being connected to the master control terminal in a communication mode, an intelligent warehouse management sub system and an intelligent key library management sub system. The master control terminal is internally provided with intelligent security tool cabinet management system software, intelligent warehouse management software and intelligent key library management system software. A three-in-one comprehensive management model of real-time voice, data and images is adopted for the system, use of a security tool, consumption of spare parts and borrowing of keys are managed through an intelligent means, the failure repair time of a response field can be effectively shortened, the failure reaction speed is increased, the agricultural distribution network construction, overhauling and repairing work efficiency is improved, the work procedure of operation personnel is standardized, the safe production awareness is enhanced, a novel intelligentized power supply station storeroom based on a technology of the internet of things is constructed, and powerful guarantee is provided for safe production of a power enterprise.
Owner:STATE GRID FUJIAN JINJIANG POWER SUPPLY

Benzimidazole diamine curing type epoxy adhesive and preparation method thereof

InactiveCN102031082AHigh tensile and shear strength at room temperatureConvenient sourceNon-macromolecular adhesive additivesCarboxyl rubber adhesivesViscous liquidElectronics
The invention relates to a benzimidazole diamine curing type epoxy adhesive and a preparation method thereof. The adhesive is prepared from the following raw materials: a component A, namely a benzimidazole diamine curing agent and a component B, wherein the component B is prepared from terminal carboxyl group butadiene-nitrile rubber, epoxy resin and a reactive diluent. The preparation method comprises the following steps of: (1) adding the terminal carboxyl group butadiene-nitrile rubber and the epoxy resin into a reaction kettle, reacting at the temperature of 90 DEG C with stirring, cooling to the temperature of 50 DEG C, adding the reactive diluent, and stirring at the temperature of 80 DEG C to obtain homogeneous and transparent viscous liquid, namely the component B; and (2) mixingthe components A and B, and stirring uniformly to obtain the adhesive. The tensile shear strength of the adhesive is 33.5MPa at the room temperature, and the adhesive has wide application prospect infields of electronics and microelectronics, rigid copper-clad laminates, motors, aerospace and the like; and the preparation process is simple, is low in cost and is convenient to operate, the resources of reaction raw materials are wide, and the adhesive can be conveniently industrially produced.
Owner:DONGHUA UNIV +1

Method for cooperatively promoting agglomeration growth of PM (particulate matter) 2.5 and treating desulfuration wastewater in evaporation manner and device of method

The invention discloses a method for cooperatively promoting agglomeration growth of PM (particulate matter) 2.5 and treating desulfuration wastewater in an evaporation manner and a device of the method. The method particularly includes steps that agglomeration liquor prepared by desulfuration wastewater, high polymer adhesive and wetting agent is sprayed into an inlet flue of an electric precipitator and is evaporated by the aid of heat of flue gas, in an evaporation process, the wetting agent promotes dust to enter drops of the agglomeration liquor, the high polymer adhesive is connected with PM2.5 via a polymer chain with polar groups, the grain diameter of the PM2.5 is prompted to be enlarged, so that the PM2.5 can be gathered by the follow-up electric precipitator, the desulfuration wastewater is evaporated completely, suspended matters and dissolvable pollutants in the wastewater are converted into solid to be dissolved out, and the suspended matters and the dissolvable pollutants in the wastewater, together with dust in the flue gas, are gathered by the electric precipitator. The device consists of a boiler, an air preheater, the electric precipitator, a desulfurizing tower, a hydraulic cyclone, a desulfuration wastewater clarification tank and an agglomeration liquor preparation tank, and a double-fluid atomizing nozzle is arranged in the flue between the air preheater and the electric precipitator.
Owner:SOUTHEAST UNIV

Continuous extractive distillation separation method of dimethyl carbonate-methanol azeotropic mixture

The invention discloses a continuous extractive distillation separation method of a dimethyl carbonate-methanol azeotropic mixture, and relates to a continuous extractive distillation method. The technical process of the method is as follows: ethylene glycol is used as an extraction agent at normal pressure; the solvent ratio is 1-3; the separated dimethyl carbonate-methanol azeotropic mixture is fed from the middle part of a tower, the extraction agent is fed from the top of the tower, and the reflux ratio is 2; high-purity methanol is extracted from the tower top of an extractive distillation tower, and the dimethyl carbonate and the extraction agent are extracted from the tower bottom; the fraction at the tower bottom enters an extraction agent recovery tower, and the reflux ratio is 3; and dimethyl carbonate is extracted from the tower top, and the extraction agent extracted from the tower bottom can be recycled. The method disclosed by the invention adopts ethylene glycol as an extraction agent, and improves the separation effect of the dimethyl carbonate-methanol azeotropic mixture; and since ethylene glycol is a co-production product in synthesizing dimethyl carbonate by a transesterification method, the source is conveniently available, and the cost caused by introducing other substances is avoided.
Owner:SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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