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2013results about How to "Adjustable thickness" patented technology

Microcapsule of organic phase change energy storage material and preparation method thereof

ActiveCN101555401AHas infrared reflective propertiesHas infrared absorption propertiesEnergy storageHeat-exchange elementsChemistryIn situ polymerization
The invention discloses a microcapsule of an organic phase change energy storage material and a preparation method thereof. The microcapsule of an organic phase change energy storage material comprises a core and a nucleocapsid, wherein the material of the core comprises the organic phase change energy storage material; the nucleocapsid at least comprises an inner layer and an outer layer, the inner layer is packaged by any one of an in situ polymerization method, an interface polymerization method, a reaction phase separating method, a double agglomeration method and a sol-gal process, and the outer layer is packaged by any one of an in situ polymerization method, a reaction phase separating method, a sol-gal process and a double agglomeration method. The microcapsule has adjustable size, nucleocapsid composition and shell thickness, favorable flexibility, mechanical strength, penetrability resistance and dispersibility and can be widely applied to the fields of energy sources, materials, aero-space, textile, electric power, medical apparatus, architecture, and the like, such as solar utilization, industrial afterheat and waste heat recovery, architecture energy storage, dress with constant temperature, air conditioners for cool and heat accumulation, constant temperature of electric appliances, and the like.
Owner:BEIJING NEW BUILDING MATERIAL

Sol-gel method for preparing earth silicon/titanic oxide hollow microballoon

The invention provides a method for preparing an SiO2 / TiO2 hollow microsphere by a sol-gel method. The method is mainly characterized in that cation polystyrene microsphere (PS) is used as a formwork; ethyl silicate and butyl titanate are respectively used as raw material and diluted ammonia is taken as regulator of pH value; a multi-layer organic-inorganic hybrid composite microsphere is obtained by the sol-gel reaction under the temperature of 70-80 DEG C. Formwork particle of the obtained deposition is removed by a calcining process to obtain the SiO2 / TiO2 hollow microsphere. By changing the consistency of reactant, content of surfactant and calcining temperature, the SiO2 / TiO2 hollow microsphere with different spherical shell thickness, density and grain size can be obtained. The hollow microsphere prepared by the method has high photo-catalytic activity, overcomes the shortage that existing preparation method of hollow microsphere can only prepare single shell layer microsphere; the multi-layer hollow microsphere can be prepared, the technique is simple, the cost is low and the preparation method of the invention is suitable for industrialized production.
Owner:SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI

A kind of preparation method of long fiber reinforced hollow fiber membrane

The invention discloses a method for preparing a long fiber reinforced hollow fibrous membrane. The method can be implemented in two ways: (1) adopting a spinning nozzle having a long fiber channel; introducing a long fiber into the long fiber channel; guiding the long fiber into a membrane casting solution and fiber compounding area via a fiber positioning plate; co-extruding the compounded long fiber and membrane casting solution; and forming a membrane under the action of core solution and external coagulating bath or cooling bath, and (2) adopting a spinning nozzle for co-extruding the long fiber and the membrane casting solution; guiding the long fiber out of a liquid material jar; guiding the long fiber to pass by a membrane casting solution pipeline and introducing the long fiber into the spinning nozzle from a membrane casting solution inlet of the spinning nozzle; co-extruding the long fiber and membrane casting solution after positioning the long fiber through the fiber positioning plate; forming the membrane under the action of core solution and external coagulating bath; and finally winding the membrane through a guide wheel and a winding machine. The long fiber reinforced compound membrane prepared by using the method has the advantages that the mechanical strength of the hollow fibrous membrane is increased by 3-5 times according to the quantity and variety of the long fiber in the hollow fibrous membrane, and the water flux, the rejection coefficient and the hydrophilicity are all obviously improved.
Owner:ZHEJIANG UNIV

Hollow porous spherical platinum-silver alloy nano-material and preparation method for same

The invention relates to a hollow porous spherical platinum-silver alloy nano-material and a preparation method for the same. The nano-material is of a spherical structure with a porous shell and an internal cavity, the diameter of the spherical structure ranges from 5 nanometers to 500 nanometers, the inner diameter of the cavity ranges from 1 nanometer to 400 nanometers, the thickness of a porewall ranges from 1 nanometer to 50 nanometers, and the pore diameter ranges from 1 nanometer to 20 nanometers. Polyatomic alcohol, inorganic silver salt precursor, inorganic platinum salt precursor and polyvinylpyrrolidone are used as reaction raw materials, inorganic salt containing halogen ions and copper-containing inorganic salt are used as auxiliaries, and the hollow porous spherical platinum-silver alloy nano-material is synthesized by means of reaction. The preparation method is simple in process, convenient in operation, fine in repeatability and low in cost, and the obtained hollow porous spherical platinum-silver alloy nano-material can be used for the fields of chemical and electrochemical catalysis, chemical sensors, biomolecular sensors, information storage, fuel cells, solarcells and the like. Particularly, the hollow porous structure of the nano-material can be effectively applied to slow drug release and target-oriented drug delivery treatment.
Owner:SHANDONG UNIV

Method for effectively preparing high-orientation and high-compactness two-dimensional material thin film

The invention relates to the field of preparation and application of two-dimensional materials, in particular to a method for effectively preparing a high-orientation and high-compactness two-dimensional material thin film. The method comprises the following steps: taking a circular tube with a smooth inner surface as a casting die; pouring a solution which contains a two-dimensional material intothe die when the die rotates in the peripheral direction at high speed; uniformly coating the inner surface of the die with the solution by using centrifugal force; forming shear force which drives the two-dimensional material to be regularly arranged layer by layer in an oriented manner in the peripheral direction in the solution in a centrifugal rotating process; and meanwhile, driving the two-dimensional material to be accumulated at high compactness by the centrifugal force so as to obtain the two-dimensional material thin film with high orientation and high compactness. The method is suitable for preparing various two-dimensional materials such as graphene, and composite thin films and laminated heterostructure thin films of the two-dimensional materials; electric property, heat property, mechanical property and the like of the thin film are greatly improved; and the method is used in the field of high-performance electric conduction / heat-conduction thin films, heat management materials, high-strength thin films, electronic / optoelectronic devices, compact energy storage, gas / ion separating films, proton transmitting films and the like.
Owner:深圳烯材科技有限公司

Method for preparing silicon dioxide-coated magnetic microspheres

The invention discloses a method for preparing silicon dioxide-coated magnetic microspheres, which belongs to the technical field of nano-magnetic materials. In the method, the characteristic that nanoparticles are easily arranged on a two-phase solution interface is utilized to form oil-in-water emulsion or microemulsion which is stabilized by oil-soluble magnetic nanoparticles and the hydrolysis of tetraethyl orthosilicate is further produced on the surfaces of droplets, so that a silicon dioxide-coated layer is formed. The method has the advantages of no need of using any surfactant, simple reaction operation process and short reaction time; particle diameters of the coated magnetic microspheres are 50 to 400nm; and the magnetic content of the microspheres can be simply controlled at the same time when the particle diameters of the magnetic microspheres are controlled.
Owner:SHANGHAI NAT ENG RES CENT FORNANOTECH

Method for preparing Fe-based WC-Ni gradient coating by using plasma cladding method

The invention discloses a method for preparing an Fe-based WC-Ni gradient coating by using a plasma cladding method, comprising the steps of: designing the number of layers of the gradient coating and the proportion of ceram A at each layer; supplying the A and metal powder B by a binocular; mixing the powder A and B through a three-way device and then putting the mixture into a coaxial powder feeding cladding gun which is controlled by a numerical control device; controlling the transverse size of the coating by controlling the walking speed, the swinging speed and the swinging amplitude as well as obtaining required coating thickness by controlling the powder feeding amount and the plasma arc power; cleaning the surface after the coating is solidified; and repeating the second to fifth steps to complete the preparation of the coating. In the invention, the used equipment is simple; the investment is low; the length, the width and the thickness of the gradient coating are adjustable; the components in the coating are uniform; the gradient coating can be prepared at local positions of workpieces; and metallurgic combination can be achieved between the coating and matrixes or between coatings with high interface combination strength.
Owner:HUBEI UNIV OF AUTOMOTIVE TECH

Method of preparing phase-change energy-accumulation material microemulsion

InactiveCN101508887AHigh viscosityLarge apparent specific heat capacityHeat-exchange elementsFreeze thawingSurface-active agents
The invention relates to a method for preparing phase change energy storage material microemulsion, comprising the steps: first, 10 parts by weight of organic phase change energy storage material can be prepared; 1-4 parts by weight of surface active agent, 1-3 parts by weight of cosurfactant, 0.3-1.5 parts by weight of inorganic salt and 10-100 parts by weight of de-ionized water or distilled water are added into the organic phase change energy storage material; after that, the mixed solution is evenly stirred and mixed at a certain temperature and then stands still; finally, the microemulsion is obtained until bubbles are completely removed; wherein, the surface active agent is compound of surface active agent A and surface active agent B, the HLB values of which are respectively 1-10 and 11-20; the weight ratio between the surface active agent A and the surface active agent B is 1:1.5-4.5, and the HLB value is 8-18 after being compounded. The obtained microemulsion is a stable system of thermodynamics, has transparent appearance, and does not have the phenomenon of phase splitting and emulsion breaking caused by a plurality of times of phase transition process due to the actions such as a plurality of times of freeze thawing, centrifugal separation and the like, thereby fundamentally overcoming the defect of poor stability of conventional emulsion and being long in service life.
Owner:SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV

Conductive rubber and application thereof

The invention relates to a conductive rubber and an application thereof. The conductive rubber is manufactured by the composite of rubber and metal fiber sintered felt in a mould pressing or injection mode; the metal fiber sintered felt is provided with pores which are at least filled with rubber. According to the invention, the metal fiber sintered felt is adopted to replace the traditional metal sponge, metal foam or metal nets to be composited with the rubber, the manufacturing molding is convenient, and the integral conductive performance can be improved; and the conductive rubber can be punched into small round grains, the conductive rubber is used in buttons of a conduction switch of a circuit board as a conductive contact element.
Owner:DONGGUAN MEMTECH ELECTRONICS MEMTECH ELECTRONICS PRO +2
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