81 results about "Degree of order" patented technology

The present invention belongs to the field of inorganic nanometer material technology, in particular, it relates to a method for preparing mesoporous molecular sieve carrier material by using diblockmacromolecular polymer. It is characterized by that under the acid condition it uses polyoxyethylene-polyoxybutylene diblock macromolecular surfactant as template agent and makes hydrothermal synthesis at 100 deg.C to prepare mesoporous silicon oxide material with two-dimensional hexagonal structure with high degree of order and large specific surface area and laminate silicon oxide material withhigh degree of order. These new material can be used as catalyst, catalyst carrier, adsorption film, organic-inorganic composite material, sensor and chromatographic packing, etc.

This disclosure relates to a porous electrically conductive carbon material having interconnected pores in first and second size ranges from 10[mu]m to 100nm and from less than 100nm to 3nm and a graphene structure and to diverse uses of the material such as an electrode in a lithium-ion battery and a catalyst support, e.g. for the oxidation of methanol in a fuel cell. The carbon material has been heat treated to effect conversion to non-graphitic carbon with the required degree of order at a temperature in the range from 600 DEG C to 1000 DEG C. A lithium-ion battery and an electrode for a lithium-ion battery are also claimed.

The invention discloses a preparation method for an ordered mesoporous carbon/tungsten carbide composite material and a supported catalyst thereof. In the method, an organic matter and a tungsten salt are separately used as a carbon source and a tungsten source, and the carbon source and the tungsten source are mixed with a surfactant; and a precursor of the ordered mesoporous carbon/tungsten carbide is synthesized by a solvent-evaporation induced self-assembly method, and then the precursor is subject to high-temperature treatment in the inert atmosphere to form the ordered mesoporous carbon/tungsten carbide composite material. The ordered mesoporous carbon/tungsten carbide composite material prepared by the method has the characteristics of high degree of order, narrow aperture distribution, large specific surface area (greater than 500 m<2>/g) and the like. The invention further comprises a supported catalyst prepared by supporting active components on the ordered mesoporous carbon /tungsten carbide composite material which is prepared by the method; and because of the synergistic effect and the structure effect of the ordered mesoporous carbon/tungsten carbide composite material, the catalyst has higher methanol electro-oxidation catalytic activity than a commercial carbon platinum-ruthenium catalyst.

The invention relates to a core-shell silicon carbon composite negative electrode material for a high-capacity type lithium ion battery and a preparation method therefor. The composite material is prepared from silicon nanoparticles and a low-crystallinity carbon material, wherein the silicon nanoparticles are taken as the core, and are coated with a low-crystallinity carbon layer formed by an organic carbon source to form a tightly-combined core-shell coating structure. According to the core-shell silicon carbon composite negative electrode material, the agglomeration among the silicon nanoparticles is effectively avoided; single silicon particles can be coated with amorphous carbon, and then the coated single silicon particles are subjected to high temperature carbonization, so that the degree of order of the carbon shell layer can be improved; the silicon volume expansion can be effectively retrained, the conductivity of the material can be improved, and the cycling performance and the rate capability of the material are further improved.

The invention discloses an electrostatic spinning device for manufacturing nano fibers in an electromagnetic field with a coupling method. The electrostatic spinning device comprises a material basket, a piston, a spinning nozzle, a high-voltage power supply device, a receiving plate and a grounding power line. The electrostatic spinning device further comprises an electric conduction coil arranged between the spinning nozzle and the receiving board and right opposite to the spinning nozzle and the receiving board. Two electromagnets are arranged on the receiving board in parallel. The orientation of nano fibers collected by electrified polymer solutions is greatly improved under the action of the electromagnetic field which is large enough. Meanwhile, the positively charged coil is added in the flow jetting process of polymers, jet flow can be stabilized, the range of a Taylor cone is reduced, and the degree of order of the nano fibers is further improved. The electrostatic spinning device for manufacturing the nano fibers in the electromagnetic field with the coupling method is simple in structure, convenient to operate, easy to control and short in technological process.

The invention discloses a mesoporous rare earth phosphate fluophor and a preparation method thereof, belonging to the field of multifunctional rare earth luminescent material. The method, which takes mesoporous silicon dioxide with an ordered pore channel structure as a hard template agent, comprises the steps of adding homogeneous solution of soluble rare-earth salts/rare earth fluophor material/strong phosphoric acid/concentrated nitric acid in the silicon dioxide pore channel, removing the nitric acid solvent through direct volatilization, thus precipitating the phosphate fluophor in the pore channel; further leading the rare earth phosphate fluophor to be cured in the mesoporous pore channel through high-temperature roasting treatment, removing the silicon dioxide hard template agent, thus obtaining the mesoporous rare earth phosphate fluophor. The mesoporous rare earth phosphate fluophor material has the characteristics of high degree of order, adjustable pore diameter and mesoporous structure, large specific surface area, pore diameter and pore volume and the like, with the specific surface area being 100-500m/g, the pore diameter being 3-8nm, and the pore volume being 0.15-1.5cm/g; and can be used as a novel absorbing and embedding material of medicaments.

The present invention is high heat stability ordered mesoporous aluminum phosphate material and its preparation process, and belongs to the field of inorganic chemistry and physical chemistry technology. The mesoporous aluminum phosphate material has composition of P2O5-Al2O3-MXOY, skeleton with primary and secondary zeolite structure units, 2D hexagonal structure, high heat stability and high degree of order. The preparation process includes synthesizing precursor solution containing the primary and secondary microporous aluminum phosphate zeolite structure units by using organic amine as template agent; and subsequent self-assembling process of the precursor and cationic surfactant to synthesize the ordered mesoporous aluminum phosphate material. The prepared mesoporous material has high specific surface area and atom connecting mode of microporous molecular sieve, may have several hetero atoms introduced, and may be used widely in chemical fields.

The invention provides a brand-new structure. By means of the brand-new structure, the micro-structured optical fiber for generating and transmitting vortex light beams does not need to be made into a circular lantern ring through as many as four kinds of materials with different refractive indexes, and the manufacturing cost and process difficulty of the optical fiber are reduced; meanwhile, the micro-structured optical fiber for generating and transmitting the vortex light beams is invariant in reflecting index outline in the long-term use process, and the degree of order and periodicity are controlled effectively. The micro-structured optical fiber for generating and transmitting the vortex light beams is provided with an inner fiber core, an inner cladding, an annular outer core and an outer cladding from inside to outside in sequence. A plurality of micro holes are evenly distributed in the inner fiber core, the inner cladding and the outer cladding. The reflecting index of each layer should meet the range of 1.510+/-20.

The invention discloses a method for preparing a spinel type lithium titanate nanowire array, in particular a method for preparing the spinel type lithium titanate nanowire array by using an aluminum oxide template. The method comprises the following steps of: preparing a porous aluminum oxide template; deoiling and annealing an aluminum plate, and performing electrochemical polishing, secondary anodic oxidation and hole expansion; synthesizing a lithium titanate sol precursor; adding butyl titanate, a complexing agent, ethylene glycol and lithium acetate dihydrate into absolute ethanol according to a proportion in turn and continuously stirring; preparing the lithium titanate nanowire array; dipping the porous aluminum oxide template into the lithium titanate sol precursor under vacuum; performing high-temperature roasting; and finally dissolving the template off with NaOH solution. Spinel type lithium titanate nanowires prepared by the method have the diameters of between 50 and 100nm; and the array has the advantages of uniform aperture size, large specific surface area, high degree of order, regular distribution, adjustable composition, controllable structure and the like.

The invention discloses a method for preparing zirconium oxide polycrystalline powder with ordered laminar nanostructure/mesoporous structure by using a surfactant as a template. The method comprises the following steps of: (1) weighing 20 parts of mixed solution of zirconium oxychloride, water and alcohol; (2) weighing 20 parts of mixed solution of sodium dodecyl sulfate, water and alcohol; (3) weighing 10 parts of mixed solution of sodium hydroxide, water and alcohol; (4) adding the mixed solution prepared in the step (2) and the mixed solution prepared in the step (3) into a flask in the step (1) to reflux and react for 1 to 4 hours with stirring; (5) heating and performing hydrothermal reaction on the mixture for 12 to 36 hours under autogenous pressure; (6) standing the stock solution at the room temperature, washing the product, filtering or performing centrifugal separation on the product and drying the product; and (7) raising the temperature to 500 DEG C and calcining the product for 2 hours to obtain the zirconium oxide polycrystalline powder with ordered laminar nanostructure/mesoporous structure. By using a new method of combined reflux method and hydrothermal method and the surfactant as the template, the degree of order of the product is improved and high thermal stability of the product is ensured.

The present invention discloses ordered mesoporous silica and its fast preparation process in an acid system with high concentration solution of three block copolymer P123 as the template agent and ethyl silicate (TEOS) as silicon source. The ordered mesoporous silica has the features of high degree of order, complete spatial group structure, great pore size, thick pore wall and high hydrothermal stability. Its preparation process is simple, fast, easy in operation, environment friendly and low in cost. It may be post-treated properly to prepare excellent adsorbent as one kind of environment protecting material or inorganic separating film with high flux, high selectivity and broad application range.

The present invention relates to method of preparing silicon oxide material having high degree of order, large pore-mosopore dual pore and high specific surface area. Surfactant is used as structure guide agent combine with inorganic silicon material to assemble into ordered structure, and under the guide of new large pore template agent polystyrene ball, through sol-gel process to form into shape. Surfactant and polystyrene ball are rmoved under high temperature, thereby multigrade silicon oxide material with high degree of order and large pore mesopole is obtd. The invented multi grade porematerial can be extensively used in adsorption, separation, sensor, optical material etc.

The invention provides a liquid crystal compound and a preparation method thereof as well as a liquid crystal mixture containing the liquid crystal compound and an application of the liquid crystal mixture. The liquid crystal compound has a general formula I as shown in the specification, wherein R1 and R2 are independently selected from one of H, alkyl with 1 to 15 carbon atoms, halogenated alkyl, alkoxy and alkenyl, one or more CH2 radicals in R1 and R2 can be independently substituted by -O-, -S- or -Cis equivalent toC-, and any adjacent two CH2 radicals can not be substituted by -O-O-; n1, n2, n3 and n4 are independently selected from 0 or 1, and at least one of n1 and n4 is 1; any one of X1, X2, X3 and X4 is F, and the others are H. The liquid crystal compound has good chemical, thermal and light stabilities; the addition of cyclopentyl can improve the ratio of a macroaxis to a brachyaxis of the liquid crystal compound and the value of degree of order S of the liquid crystal compound to ensure that the liquid crystal compound has a nematic phase with a wide temperature range and a high elasticity coefficient K.

The invention relates to the technical field of preparation of nanophase materials, and in particular relates to a preparation method of graphene powder. The preparation method comprises the following steps: (1) preparing a graphene oxide solution; (2) adding organic small molecules to the graphene oxide solution, stirring and drying to obtain graphite oxide containing the organic small molecules; and (3) carrying out heat reduction treatment on the dried graphite oxide containing the organic small molecules to obtain graphene powder. The graphene powder prepared by the method provided by the invention has the characteristics of high degree of peeling, thin sheets, few structural defects, good degree of order and excellent electric conductivity, and has great application prospects in the fields of lithium-ion batteries, supercapacitors and the like.

The invention discloses a method for preparing an anodic alumina template by using a plastic packaging process and application thereof. The core point of the method is that the plastic packaging process is utilized for insulation blocking on one surface needing no reaction or treatment of an aluminum sheet, and the method comprises the following steps that: during electrochemical polishing of the aluminum sheet, one surface of the aluminum sheet is sealed by using the plastic packaging process, and the other surface of the aluminum sheet is exposed for polishing; during anodic oxidation of the aluminum sheet, only the surface exposed for polishing is subjected to anodic oxidation due to insulation blocking resulting from plastic packaging; during removal of an aluminum base, by utilizing sealing protection of plastic packaging to the alumina template, a surface of the aluminum base is exposed in a solution and removed so as to obtain the anodic alumina template. The anodic alumina template prepared by the method is colorless and transparent, has a high degree of order and is easy to preserve. According to the invention, high quality alumina templates can be prepared by using plastic package glue cover without any special equipment, and preparation of an alumina template with a large area is made to be simple and easy, thereby greatly improving a success rate of preparing templates, reducing preparation cost for the templates and having remarkable economic benefits.

The invention discloses a preparation method of a kaolin product used for a catalytic cracking catalyst, which comprises the steps of sully preparation, grading, bleaching, mixing and drying in sequence. The prepared kaolin product is used for preparing the catalyst used in catalytic cracking technology of petroleum chemical industry. The invention changes the method of mixing first and then sorting used for preparing the kaolin product of the exsiting domestic kaolin enterprises. The method, aiming at different raw materials, adopts a unique selecting technology to prepare the kaolin product with moderate degree of order and the contents of kaolinite (platelets) and halloysite (tubes) in the product are controlled effectively.

The invention provides compositions and methods for inducing and enhancing order and nanostructures in block copolymers and surfactants by certain nonpolymeric additives, such as nanoparticles having an inorganic core and organic functional groups capable of hydrogen bonding. Various compositions having lattice order and nanostructures have been made from a variety of copolymers or surfactants that are mixed with nonpolymeric additives. Particularly, a variety of nanoparticles with an inorganic core and organic functional groups have been discovered to be effective in introducing or enhancing the degree of orders and nanostructures in diverse block copolymers and surfactants.

A process for preparing high-ordering high-stability mesoporous molecular sieve MCM-41 by using the ammonium dodecyl (or tetradecyl or hexadecyl or hexadecyl or octadecyl) trimethyl chloride as template and the C1-C5 alcohol as organic disperser includes preparing microcrystalline solution and preparing colloid.

The invention discloses a mesoporous rare earth phosphate and a preparation method thereof, belonging to the field of porous nano-material. The method, which takes mesoporous silicon dioxide with an ordered pore channel structure as a hard template agent, comprises the steps of adding homogeneous solution of soluble rare-earth salts/strong phosphoric acid/concentrated nitric acid in the silicon dioxide pore channel, removing the nitric acid solvent through direct volatilization, thus precipitating the phosphate in the pore channel; further leading the rare earth phosphate to be cured in the mesoporous pore channel through high-temperature roasting treatment, removing the silicon dioxide hard template agent, thus obtaining the mesoporous rare earth phosphate. The mesoporous rare earth phosphate has the characteristics of high degree of order, adjustable pore diameter and mesoporous structure, large specific surface area, pore diameter, pore volume and the like, with the specific surface area being 100-500m/g, the pore diameter being 3-8nm, and the pore volume being 0.15-1.5cm/g. The prepared mesoporous rare earth phosphate can be used for the embedding treatment of radioactive wastes.

The present invention relates to a high scattering smectic liquid crystal material and display device using the same. In the present invention, a series of smectic A phase liquid crystals having compact arrangement of crystal domains or a series of smectic liquid crystal mixed materials having a degree of order higher than that of the smectic A phase and an optical texture different from that of the smectic A phase are obtained by mixing a smectic liquid crystal with an organic compound having a high optical anisotropy (Δn) or mixing different types of smectic phases. When used in a smectic stable state liquid crystal display pattern, these materials have high scattering properties and can effectively improve the contrast of a smectic liquid crystal display device. The present invention also improves contrast when it used in a reflective smectic liquid crystal display device.

The invention discloses a preparation method of a porous alumina template and belongs to the technical field of nanoimprint. The preparation method comprises the following operation steps: (1) performing ultrasonic cleaning on the surface of an aluminum sheet; (2) annealing under the condition of a high temperature to eliminate the internal stress of the aluminum sheet; (3) performing electrochemical polishing in the mixed solution of perchloric acid and ethanol; (4) performing primary anodic oxidation in an oxalic acid solution; (5) performing secondary anodic oxidation in an oxalic acid solution; (6) finally, performing pore broadening on the aluminum sheet. The porous alumina template prepared by use of the preparation method has the advantages of high degree of order, stable preparation method and the like, and is suitable for industrial popularization and utilization.

The invention relates to a method for preparing L10-FePt Nano-particles through water bath alternate reduction, and the method comprises the following steps of: controlling degree of order of Fe elements and Pt elements in particles; modulating chemical degree of order of the Nano-particles, thereby reducing phase transformation temperature of the Nano-particles; the phase transformation temperature of the L10-FePt Nano-particles is reduced, so that the L10-FePt Nano-particles are of important significance in application of ultrahigh density information storage field. In the method, FePt Nano-particles can be prepared at a lower temperature through a simple operation craft and a low-cost experiment method. The FePt Nano-particles prepared by the method disclosed by the invention is of a certain chemical order, therefore, ordering temperature of the L10-FePt Nano-particles can be effectively reduced, and the method disclosed by the invention belongs to a development field for ultrahigh density perpendicular magnetic recording materials...

A novel method of synthesis of cubic mesoporous molecular sieve materials is provided, which relates to the synthetic method of the cubic (Ia3d) mesoporous molecular sieve materials. The invention aims to introduce the acidity and improve the stability. The quarternary ammonium cationics CmTMA+, the quarternary ammonium cationics Cn-3-1 with bipolar head, the boric acid, the water, the sodium hydroxide and the silicon source are mixed according to the mol ratio of 0.03 to 0.05 : 0.03 to 0.06 : 0.003 to 0.05 : 100 to 150 : 0 to 0.4 : 1; the silicon source is calculated based on the SiO2 volume and the pH value is adjusted to 9 to 10; then chemical regulators having mol ratio of 0.03 to 0.06 with the SiO2 volume of the silicon source are added into the mixture and is crystallized for 48 to 72 hours under 373K; the pH value is adjusted between 9 and 10 every 12 hours; the cubic mesoporous molecular sieve materials are gained through separation, washing and drying after completing the crystallization. The prepared mesoporous materials are characterized by high degree of order, uniform mesoporous arrangement, high specific area, strong acidity and high stability.

The invention belongs to the field of steel material preparation, and relates to a method for preparing high silicon steel cold-rolled strip steel based on thin-strip continuous casting. According to the method, molten steel is smelted according to set components, wherein the components comprise, by weight percentage, 0.002-0.005% of C, 4.0-7.0% of Si, 0.1-0.3% of Mn, 0.01-0.04% of Al, 0.02-0.03% of S, 0.008-0.020% of N, 0.02-0.05% of Nb, 0.01-0.04% of V, less than or equal to 0.002% of O, and the balance Fe and inevitable impurities; the Mn, the Al, the Nb, the V and other second phase forming elements are added into high silicon steel and are uniformly dispersed and separated out in the heat treatment process of a cast strip, and therefore normal growth of ferrite grains can be inhibited, occurrence of abnormal growth can be promoted, the texture of the cast strip can be optimized, and the machinability can be improved; and then low-temperature hot rolling is carried out on the cast strip, the degree of order of the high silicon steel can be further reduced, and the cold rolling process can be finally realized. The method for preparing the high silicon steel cold-rolled thin strip has the advantages of being short in process and high in efficiency, a final product is good in strip shape, and the method can be widely realized in the process and has a wide application prospect.

An inorganic fiber state bismuth compound and application thereof are disclosed. Bismuth oxide as a raw material is treated in a hydrothermal system, and varieties and dosages of additives and surfactants in the hydrothermal system are adjusted to control and regulate the degree of order and phase composition of a fiber product so as to obtain the nanometer ordered inorganic fiber state bismuth compound. The compound is used for preparing waterborne colloid with a simple preparation process and low reaction temperature, and the obtained waterborne colloid is uniform in composition and good instability.

The invention discloses a preparing method for an aluminum oxide two-dimensional photonic crystal. The preparing method includes the following steps that an aluminum sheet is pretreated and subjected to anode electrochemical polishing; first-time anodizing is conducted; a first-time oxide film is removed; and second-time anodizing and chambering treatment are conducted. The requirements for high controllability, small fractures, a high degree of order and good crystallinity of a photonic crystal sample in the preparing process of the two-dimensional photonic crystal are met.