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53results about How to "Decomposition will not" patented technology

Method for preparing carbon nano tube enhanced titanium-base compound material by in-suit reaction

The invention relates to a method for preparing a carbon nano tube enhanced titanium-base compound material by in-suit reaction in order to solve the problems of low uniform dispersion and low structural completeness of a carbon nano tube in the conventional method for preparing the carbon nano tube enhanced titanium-base compound material and pollution to the titanium-base material caused by reaction of a carbon group and a titanium base body. The method comprises the following steps of: adding nickel nitrate hexahydrate and TiH2 powder into an ethanol solution, stirring and evaporating to obtain Ni-TiH2 compound powder; paving the Ni-TiH2 compound powder in a quartz boat, putting the quartz boat into deposition equipment, feeding H2, raising temperature, feeding CH4, and after the deposition is finished, stopping feeding the CH4 so as to obtain carbon nano tube/TiH2 compound power; pressing the carbon nano tube/TiH2 compound power into a block body, sintering, and re-pressing to obtain the carbon nano tube enhanced titanium-base compound material. Carbon nano tubes in the compound material are uniform to disperse and cannot be aggregated; the compound material is high in purity and has a complete structure; and reaction between the titanium and the defected carbon nano tube can be avoided.
Owner:HARBIN INST OF TECH

Sustained-release antioxidant packaging film for food and preparation method thereof

ActiveCN103435894AGuarantee green safetyControl Oxidative DeteriorationFlat articlesMasterbatchPolymer science
The invention relates to a sustained-release antioxidant packaging film for food and a preparation method thereof. A film substrate of the packaging film is formed by blending 50-80 parts by weight of HDPE (High-Density Polyethylene) and 20-50 parts by weight of EVA (Ethylene-Vinyl Acetate Copolymer) while adding 5-12.5 parts by weight of diatomite and 0.75-1.25 parts by weight of quercetin. The preparation method comprises the steps: (1) uniformly mixing an HDPE master batch and an EVA master batch, and plasticating; (2) sprinkling diatomite on a roller-wrapped blending thin sheet, plasticating for 6-8 minutes, sprinkling quercetin, and plasticating for 6-8 minutes; (3) carrying out roller release, tiling on a flat plate in single layer, cooling, and then cutting; (4) carrying out hot pressing; (5) carrying out pressure forming, thereby obtaining the packaging film. The packaging film disclosed by the invention has sustained release antioxidant performance, so that the effective utilization ratio of an antioxidant can be increased obviously; meanwhile, the packaging film has good mechanical properties and dampness and oxygen barrier performance; the condition that the packaging film prepared by the method disclosed by the invention has a higher antioxidant retention ratio can be guaranteed.
Owner:JIANGNAN UNIV

Preparation method of polytetrafluoroethylene fiber with porous structure

The invention relates to the field of micro-nano fiber preparation, and aims to provide a preparation method of polytetrafluoroethylene fiber with a porous structure. The preparation method comprisesthe following steps of dissolving polyvinylpyrrolidone and polytetrafluoroethylene emulsion in deionized water, and stirring at room temperature to form a homogeneous solution; performing standing anddefoaming; adding the obtained spinning solution into a spinning device, and preparing micro-nano fiber through an electrostatic centrifugal spinning process; calcining the micro-nano fiber at the temperature of 360 DEG C in a nitrogen atmosphere; and carrying out dipping treatment in water, taking out the fiber, and drying the fiber to obtain the micro-nano fiber containing the microporous structure. According to the preparation method, the polytetrafluoroethylene fiber with the porous structure can be obtained by utilizing the high-temperature difficult-to-decompose property and the water-soluble property of the polyvinylpyrrolidone. The prepared product can improve the specific surface area and porosity of an original fiber material, can effectively improve the permeability, hydrophobicity and other properties of a fiber membrane, and has great application prospects in the fields of air filtration, oil-water separation, membrane distillation and the like.
Owner:ZHEJIANG SCI-TECH UNIV

Diffusion pump capable of achieving rapid starting, floating heating and rotating injection

The invention discloses a diffusion pump capable of achieving rapid starting, floating heating and rotating injection. The diffusion pump comprises a pump body, pump oil, a pump core, an evaporation system, a cooling system, an injection system and a control system, the evaporation system of the pump adopts a heating mode of floating heating, the evaporation system comprises an evaporator, a heater and a temperature measuring and temperature control element, the evaporator is provided with a heating area and an oil storage area, the heating area and the oil storage area are separated through amiddle partition plate and communicate with each other through an oil hole in the partition plate, the heater is arranged in the heating area, and is used for heating the pump oil in the heating areato enable the pump oil to be instantly evaporated to become steam, the heater is fixed on the middle partition plate, the middle partition plate can float in the pump oil, the top of a steam guide pipe in the injection system is provided with a rotating spray head, a series of nozzles are arranged on the periphery of the rotating spray head, when steam is sprayed out of the nozzles, the rotatingspray head can rotate at a high speed, a heating device is arranged on the steam guide pipe or around the steam guide pipe so that the temperature of the pump core and the steam can be improved, and rapid starting of the diffusion pump can be realized.
Owner:QINGDAO TECHNOLOGICAL UNIVERSITY
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