267results about How to "High degree of crystallinity" patented technology

The invention relates to a magnetic separation type composite adsorbing material which is prepared from nano Fe3O4 and active carbon fiber. The ferriferous oxide nano composition fiber material is synthesized by using conventional organic solvent as the reaction medium under the control of a simple low temperature solvent thermal system. The magnetic separation type composite adsorbing material can be used as a magnetic separation type adsorbing material for adsorbing organic or inorganic pollutants to purify waste water.

The invention discloses a rare earth organic framework material for iron ion fluorescence detection and a preparation method thereof. Methoxyl functional group-containing linear dicarboxylic acid (L-OCH3) is used as an organic raw material, a hydrothermal reaction is performed on the organic raw material and metal rare earth salt, and in the reaction process, an in-situ reaction is performed on methoxyl functional groups of an organic ligand to produce hydroxyl functional groups and the rare earth organic framework material is obtained. After adoption of the hydrothermal preparation method, the method is simple and the yield is high; the prepared rare earth organic framework material can be used as a fluorescent probe and interacts with iron ions, so that fluorescence of the organic ligandis quenched and new fluorescence generating a Ln2 (L-OH) 3-Fe<3+> compound is enhanced, and the intensity ratio between two peaks has a relatively good linear relationship with the concentration of the iron ions; the rare earth organic framework material can be applied to ratio detection of the iron ions.

The invention discloses a polypropylene toughening modifying agent and a polypropylene modified product thereof. The polypropylene toughening modifying agent comprises the following components: 15-50 wt percent of polyethylene, 15-50 wt percent of polypropylene, 20-55 wt percent of ethylene/octene copolymer (POE), 0.1-2.0 wt percent of initiator and 0.05-1.0 wt percent of antioxidant. A polypropylene modified pipe and an injection molding product which are produced by adopting the polypropylene toughening modifying agent are produced by the steps as follows: 2-15 wt percent of the polypropylene toughening modifying agent and 85-98 wt percent of polypropylene resin are physically mixed, a proper amount of coloring agent is added, the polypropylene modified pipe is extruded on a single-screw pipe extruder, and the polypropylene modified product is injected-molded on an injection molding machine. The polypropylene modified product has an impact strength which is increased by 28-34.5 percent, the melting temperature which is raised by 1.5-1.8 DEG C, and the crystallinity which is increased by 26.7-35.2 percent. According to the invention, the slow secondary crystallization of the polypropylene modified product in a post-stage storage process can be effectively reduced, and the residual internal stress of the polypropylene modified product is greatly eliminated.

The invention discloses a preparation method of columnar monocrystal nano-TiO2 array film. In the method, firstly, hydrochloric acid and alcohol substances (methyl alcohol, ethanol, butanol and glycol) are dipped into tetrabutyl titanate under the condition of stirring, and mixture is dripped into deionized water to form even solution; the solution is poured into a hydrothermal reaction kettle; the conductive surface of conductive glass cleaned by deionized water, alcohol and acetone solution faces downwards to lean against the inner wall of the reaction kettle; after the reaction kettle is put in a constant-temperature oven for hydro-thermal treatment for a period, conductive glass after reaction is washed with deionized water and naturally dried to obtain columnar monocrystal nano-TiO2. The invention has the advantages of low cost of raw materials, low experiment temperature, simple technology, convenient operation and the like. The prepared columnar monocrystal nano-TiO2 array film has adjustable density, thickness, orientation and degree of crystallinity and is suitable for industrial production. The invention can be used for solar cell film material and photocatalytic degradation organic matter material.

The invention discloses an anti-impact MPP (molypermalloy powder core) electric protection tube. The anti-impact MPP electric protection tube is prepared from the following raw materials in parts by weight: 90-110 parts of polypropylene, 5-15 parts of ethylene-propylene-diene monomer, 10-25 parts of talcum powder, 3-10 parts of brucite powder, 5-12 parts of modified micro silicon powder, 0.8-2 parts of colouring agent, 5-15 parts of nano mica, 0.5-2 parts of antioxidant, 0.5-2 parts of polytetrafluoroethylene, 10-25 parts of modified shell powder, 5-15 parts of modified hectorite, 5-25 parts of novel organic montmorillonite, 5-18 parts of melamine cyanurate, 10-25 parts of modified crystal whisker, 15-30 parts of long glass fiber, 3-8 parts of expandable graphite and 5-20 parts of intumescent flame retardants. The anti-impact MPP electric protection tube has excellent impact resistance, flame retardance, ageing resistance, cold resistance and heat resistance.

The invention provides a preparation method of a medical magnesium alloy capable of being evenly degraded. The preparation method comprises the following steps: designing a Mg1-a-bREaZnb alloy according to an atomic ratio; smelting raw materials at 720 DEG C to 750 DEG C to form a smelting liquid, feeding argon to stir and refine for 5 to 10 minutes, then standing at 740 DEG C for 15 to 25 minutes, cooling to 700 DEG C to 710 DEG C and pouring so as to obtain an alloy casting rod; carrying out heat preservation on the alloy casting rod at 500 DEG C to 530 DEG C for 8 to 12 hours, and cooling in an air-cooling manner; carrying out hot extrusion on the alloy casting rod subjected to the heat treatment at 380 DEG C to 430 DEG C under the conditions that the extrusion rate of an extrusion rod is 0.5 to 1mm/s and the extrusion ratio is greater than 20; carrying out aging treatment on the alloy subjected to the hot extrusion at 180 to 220 DEG C for 10 to 100 hours. The prepared magnesium-rare earth alloy which can be degraded and absorbed is excellent in mechanical property, high in corrosion resistance and even in degradation behavior. Thus, the prepared magnesium-rare earth alloy can serve as a degradable human body hard tissue implant material.

The invention pertains to methods of obtaining anisotropic crystalline films and to devices for carrying out the methods. A colloidal system with anisometric particles is applied as a film onto the surface of a substrate while the viscosity of the colloidal system is lowered. The particles of the colloidal system with lowered viscosity are oriented and the original viscosity of the colloidal system is restored. The film is then dried. The drying is carried out under controlled conditions. Zones of the dried film may be progressively heated to improve the film characteristics.

The invention discloses a dye/rare earth organic framework composite material for physiological temperature detection. The composite material has a general structural formula as follows: LnLDye, wherein Ln is a rare earth element-europium or terbium; L is quaterphenyl-3,5,3',5'-tetracarboxylic acid, 4,4-([1,1'-biphenyl]-4,4'-biradical)bis(pyridine-2,6-dicarboxylic acid), 4-(3'',5''-dicarboxylic acid)-([1,1':4',1''-terphenyl]-4-yl)pyridine-2,6-dicarboxylic acid, 2',3''-dimethyl-[1,1':4,1':4',1''-quaterphenyl]-3,3'',5,5''-tetracarboxylic acid or 2'-methyl-[1,1':4,1':4',1''-quaterphenyl]-3,3'',5,5''-tetracarboxylic acid; Dye is an organic dye-perylene, pyrene, rhodamine B or coumarin. The composite material is prepared by adopting a solvothermal reaction method and is simple in process, high in yield and good in stability; in addition, the composite material has characteristic luminescence peaks of rare earth ions and dye molecules at the same time, the strength ratio of the two peaks and the temperature form a relatively good linear relation at 20-80 DEG C, self-calibration temperature detection can be realized, and relatively high sensitivity is achieved.

The invention relates to a method for preparing a microcrystalline glass by utilizing steel slag. The method comprises the following steps of: firstly, carrying out drying and ball milling on the steel slag and removing iron contained in the steel slag to prepare powder of 100 meshes; then mixing the steel slag powder, quartz sand, sodium nitrate, barium nitrate, zinc oxide and cerium dioxide into a compound material; placing the mixture obtained from the former step into a crucible, and smelting at 1250-1380 DEG C to form a transparent steel slag glass; and finally, crystallizing the transparent steel slag glass to form the steel slag microcrystalline glass containing calcium akermanite as a main crystal phase. The method disclosed by the invention utilizes the blast furnace steel slag as a main raw material and achieves the utilization amount of the steel slag at 96%; and the microcrystalline glass prepared according to the method has the advantages of high structural strength, low water absorption, high crystalline degree and various color. The preparation process disclosed by the invention is simple in operation process and low in cost, can effectively reduce the production cost of the microcrystalline glass, protects the environment and changes the wastes into valuables, is suitable for industrialized large-scale production and has obvious economic benefit and environmental benefit.

The invention discloses a carbon-coated CoAl-LDH@NF composite electrode material and a preparation method thereof. The preparation method disclosed by the invention comprises the steps of firstly utilizing cobalt nitrate and aluminum nitrate as a cobalt source and an aluminum source and foamed nickel as a substrate and obtaining Co-Al LDH@NF after one-step hydrothermal; then utilizing glucose or cane sugar as a carbon source to coat the Co-Al LDH@NF and performing hydrothermal treatment to obtain Co-Al LDH@NF@C. According to the preparation method disclosed by the invention, a substep hydrothermal-drying method is utilized, a preparation technology and required equipment are simple, raw materials are rich in source, reaction temperature is lower, high-temperature carbonization is avoided, and large-scale production is easy to achieve. The Co-Al LDH@NF@C composition material obtained through the method disclosed by the invention has good thermal stability, high crystallization degree and large specific surface area, further has strong morphology controllability and is one of ideal energy materials.

The invention discloses a preparation method of a resistance switch adopting TiO2/SnO2 composite nano-rods. The preparation method comprises the following steps: 1), directly growing TiO2/SnO2 composite nano-rod arrays on a conductive substrate according to a hydrothermal method; 2) annealing the conductive substrate, which is obtained in step 1) and provided with the TiO2/SnO2 composite nano-rod arrays grown thereon under 200 to 800 DEG C for 1 to 5 hours, so as to obtain the resistance switch adopting the TiO2/SnO2 composite nano-rods. The preparation method has the advantages that the indoor temperature resistance switch characteristic of the resistance switch adopting the TiO2/SnO2 composite nano-rod array structure can be better; the resistance switch effect under a low temperature can be higher; the circulating stability is favorable; the master mould of a resistance switch-type non-volatile memorizer can be prepared.

The invention discloses a method for preparing glass ceramic by sintering bulk of solid waste coal gangue and rice husk ash serving as main raw materials. The glass ceramic provided by the invention is prepared from the following raw materials in parts by weight: 28.1 to 32.5 parts of coal gangue, 4.0 to 6.5 parts of rice husk ash, 3.5 to 5.0 parts of sodium carbonate, 7.0 to 8.5 parts of calciumcarbonate, 2 to 3 parts of magnesium oxide and 2 to 3 parts of titanium dioxide. The method comprises the following steps: mixing the ingredients evenly, and heating to a melting temperature of 1,400to 1,450 DEG C; performing quenching, ball milling and tableting on the obtained glass melt, preserving heat at 740 to 790 DEG C and 820 to 870 DEG C for 1 to 1.5 hours, and performing heat treatmentto obtain glass ceramic which takes calciclase as a principal crystalline phase and takes diopside as a secondary crystalline phase. A large amount of SiO2 in the rice husk ash serving as a raw material reduces the high aluminum characteristic of the coal gangue, adjusts the ratio of Si to Al in the formula, and improves the utilization ratio of the solid waste coal gangue and rice husk; moreover,the method has the advantages of simple formula composition, low melting temperature and relatively low heat treatment temperature; the prepared glass ceramic has high compactness, corrosion resistance and wear resistance, and the added value of two solid wastes of coal gangue and rice husk is greatly increased.

The invention discloses a method for directly preparing uniform alpha-type Fe2O3 nanoparticles/multilayer graphene composite material by using iron powder. Comprises the following steps: DMF and deionized water with volume ratio of 8: 2 are mixed as mixed solvent; Expanded graphite was added and treated with ultrasonic wave for 3 hours to obtain multilayer graphene mixed solution. Fe powder, dilute nitric acid and anhydrous sodium acetate are added into that mix solution; The solution is stirred in a water bath at 70-90 DEG C for 4-10 hours, cooled and centrifugally cleaned to collect black products; 3 time of centrifugal cleaning of that reactant with alcohol and water respectively, and drying in an oven at 60 DEG C for 12 hour to obtain the dried alpha-type Fe2O3 nanoparticle/multilayergraphene composite material of the invention. The invention has the advantages of simple process, wide material source, low cost, nano-sized alpha-type Fe2O3 particles, uniform particles and good dispersibility.

The invention relates to a method for preparing a hexagonal boron nitride interface coating, which comprises the following steps of: preparing a fiber preform or a high-purity graphite substrate, performing chemical vapor deposition on a boron elementary substance, and nitriding the boron elementary substance. The method is high in designability and repeatability and simple in process. The prepared boron nitride interface coating has a graphite-like layer structure, high crystallinity and low oxygen content, is compact and uniform, can meet the requirement of a ceramic-based composite material anti-oxidation interface coating, and also can be popularized to a substrate or a surface coating material.

The invention discloses a graphene-oxide-modified polypropylene composite material which is prepared from graphene-oxide-modified polypropylene, ethylene propylene diene monomer rubber, a butadiene-acrylonitrile copolymer, a silane coupling agent, zinc borate, magnesium hydroxide, pentaerythritol, epoxy soybean oil, tritolyl phosphate, pentaerythritol stearate, yttrium oxide, nano mica powder, talcum powder, silicon micropowder, 1,3,2,4-di(3,4-dimethylbenzylidene)sorbitol, an ethylene-octylene copolymer and 2-hydroxy-4-n-octyloxy diphenyl ketone. The graphene-oxide-modified polypropylene composite material has the advantages of high strength, excellent heat resistance, excellent flame retardancy and favorable heat stability.

The invention discloses a dual-rear-earth organic framework material for physiological temperature detection. The structural formula of the dual-rear-earth organic framework material is Tb1-xEuxL, wherein x is greater than 0 and not greater than 0.5, and L is 4,5-di(4'-carboxyphenyl) phthalic acid, 4,5-bis(6-carboxyl pyridine-3-yl) phthalic acid, 4,5-bis(5-carboxyl pyridine-2-yl) phthalic acid or 5,6-bis(4-carboxyphenyl) pyridine-2,3-dicarboxylic acid. The dual-rear-earth organic framework material is prepared by virtue of a solvothermal method, and the preparation method is simple and high in yield. The dual-rear-earth organic framework material has characteristic luminescence peaks of rear-earth europium ion and terbium ion, and the ratio between intensity of the two peaks has a relatively good linear relation with temperature, so that self-aligning detection can be realized, sensitivity is relatively high, and the temperature detecting range including a physiological temperature range is 25-75 DEG C; and moreover, the luminescence color of the dual-rear-earth organic framework material obviously changes with the changes of the temperature, so that the real-time temperature image-forming can be realized, and thus, the dual-rear-earth organic framework material is expected to be practically applied in the physiological temperature detection field.