87results about How to "Strong structural controllability" patented technology

The invention relates to a metal-organic framework material for methane adsorption separation and a preparation method thereof. The metal organic framework material is prepared by reaction of at least a metal compound and at least one organic ligand, wherein the metal is one or more selected from Li, Mg, Al, Fe, Co, Ni, Cu, Zn, Mn, Zr, La and Sm, and the organic ligand is one or more selected from single or multidentate organic compounds containing nitrogen, oxygen or sulfur atom. The material has advantages of simple preparation process, high yield, easily available raw materials, mild reaction conditions; besides, the material has stable self properties and porous structure, and is especially suitable for separation of low-quality methane and purification process of high-concentration methane.

The invention relates to an efficient and low-resistance electrospun nanofiber air filter material and a batch preparation method. The filter material is of a sandwich structure formed by alternately arraying spun-bonded nonwovens and nanofibers; by the adoption of a pinfree type electrostatic spinning nozzle and by an electrostatic spinning and electrostatic spraying synchronous combination technology, a nanofiber/microsphere composite film is prepared; a revolving rotary drum is used as a receiving device, and the spun-bonded nonwoven is used as a receiving matrix, so that a nanofiber/nonwoven composite material is obtained; a layer of spun-bonded nonwoven covers the surface of the nanofiber/nonwoven composite material to form the sandwich structure with the spun-bonded nonwovens and the nanofibers which are alternately arrayed; the sandwich structure is bonded to obtain the efficient and low-resistance electrospun nanofiber air filter material. The preparation process is simple, and high in controllability and repetitiveness, and the prepared air filter material has the characteristics of high efficiency and low resistance, and is uniform in thickness and stable in filter performance; batch production of the nanofiber filter material can be realized; the efficient and low-resistance electrospun nanofiber air filter material has very good application prospect in the field of air filtering.

A process for synthesizing a furfural-phenolic aldehyde based carbon aerogel includes polymerizing furfural with phenolic resin in aqueous solution under catalysis of alkali to obtain sol and wet gel, displacing the water in wet gel by organic solvent, drying the gel in supercritical solvent, and cracking the dried gel in inert gas. The resultant carbon aerogel is a 3D space unit (3-200 nm) with a core of glass carbon particle (10 nm). Its advantages are simple regulatable range and low cost.

The invention provides a preparation method of an iron filled carbon nano tube and a reaction device. The preparation method of the iron filled carbon nano tube comprises the following steps of: preparing the iron filled carbon nano tube by adopting an inorganic covalent compound of iron namely ferric chloride anhydrous as a catalyst precursor and selecting different carbon sources through floating catalysis chemical vapor deposition method, wherein the iron filled carbon nano tube comprises a non-nitrogen-doped iron filled carbon nano tube or a nitrogen-doped iron filled carbon nano tube. The preparation method of the iron filled carbon nano tube disclosed by the invention is simple and scientific in steps and can prepare a high-iron filled carbon nano tube. The invention further discloses a reaction device of the preparation method of the iron filled carbon nano tube. According to the preparation method of the iron filled carbon nano tube and the reaction device, a plurality of disadvantages in the prior art can be overcome; and the advantages that the preparation method is simple and the obtained iron filled carbon nano tube has high iron filling rate are realized.

The invention relates to a needle-like copper hydroxide material prepared based on copper grid surface in-situ growth, a preparation method and an oil-water separating method. The needle-like copper hydroxide material grows on a copper grid in an in-situ mode and has a hydrophilic and oleophilic surface or a hydrophobic surface structure. The preparation method comprises the steps: (1) cleaning the copper grid up; (2) putting the copper grid in a sodium hydroxide and ammonium persulfate mixed solution to react; (3) repeatedly putting the copper grid or no putting the copper grid into the sodium hydroxide and ammonium persulfate mixed solution with a progressively-decreasing concentration to react according to need; (4) finally, directly putting the copper grid into the sodium hydroxide andammonium persulfate mixed solution with the concentration which is further reduced or deionized water to react and preparing needle-like copper hydroxide on the surface of the copper grid; (5) performing hydrophobic treatment on the copper grid according to need to obtain super-hydrophobic needle-like copper hydroxide on the surface of the copper grid. The needle-like copper hydroxide material disclosed by the invention has the advantages of simple method, easiness in operation and suitability for large-area preparation. The copper grid can be applied oil-water separation and has a higher oil-water separating efficiency.

The invention provides a 3D-printing wound dressing material based on silk microsphere bio-ink and a preparation method thereof. The preparation method includes the following steps: transferring silkmicrosphere bio-ink, which includes silk protein microspheres coating aspirin, silk protein water solution, ultraviolet initiator and polyvinyl alcohol ester, into a syringe of a 3D-printing machine;with a cotton gauze as a base printing cloth, printing the surface of the cotton gauze with the silk microsphere bio-ink according to a periodically circulated cross-network structure model; and rapidly curing and shaping the 3D-printing wound dressing material under ultraviolet irradiation. The product is based on 3D-printing technology, wherein the formed cross-network structure contains regularly arranged silk microspheres, and the silk microsphere bio-ink coating layer cures on the surface of the cotton gauze and does not completely penetrate through the cotton gauze. The 3D-printing wounddressing material has good mechanical performance and biocompatibility and excellent slow-release performance, can protect a wound for a long time and can accelerate healing of the wounding.

The invention belongs to the field of electrochemistry catalysis and particularly discloses a carbon-based non-metallic oxygen reduction catalyst as well as a preparation method and an application thereof. The carbon-based non-metallic oxygen reduction catalyst is a polymer which is prepared by doping other heteroatom (e.g. B, O, F, P, S, Cl, Br and I) derived from an N-contained polymerization product which is obtained by polymerizing aromatic nitrile compounds. The catalyst provided by the invention is high in conductivity, has a carbon skeleton structure with a high specific surface area and can be doped with many kinds of heteroatom. The catalyst has good oxygen reduction activity and high stability and is free from influence of methanol and carbon monoxide; besides, the catalyst is wide in application scope and is suitable for various systems containing oxygen reduction reaction, including a lithium air cell, a sodium air cell, kinds of fuel cells and so on; compared with an existing commercial platinum carbon (Pt/C) catalyst, the catalyst has the advantage of simple preparation, efficiency, environment friendliness, low cost and excellent performance.

The invention discloses a method for preparing ceramic-based three-dimensional photonic crystals with photo-curing direct molding. The process comprises the following steps: firstly, preparing a ceramic sizing agent; then carrying out photo-curing direct molding on the ceramic sizing agent by a rapid molding machine to prepare the ceramic-based three-dimensional photonic crystal according to CAD model design data; and finally washing, drying and roasting the prepared photonic crystal. The method has simple manufacturing process and strong structure controllability, solves the difficult problems for carrying out active design and effective control manufacture on the photonic crystal with a random complex structure, has the advantages which other manufacturing methods do not have and can beused for manufacturing the three-dimensional photonic crystal with arbitrarily complex structure.

The invention belongs to the field of textile materials and discloses a micron fiber three-dimensional framework/polymer nanofiber composite filter material and a preparation method thereof. The preparation method comprises the following steps: preparing polymer nanofibers by adopting a melt blending method; dispersing the polymer nanofibers and a crosslinking agent into a solvent to form a suspension, then soaking micron fiber nonwoven fabric skeletons into the suspension, carrying out freeze drying to form coagulation blocks, and then removing the solvent, so that a nonwoven material with polymer nanofiber aerogel gradiently distributed among the micron fiber nonwoven fabric skeletons is obtained. According to the invention, the adopted preparation technology is simple, raw materials are environment-friendly, conditions are mild, the composite filter material is applicable to industrialized mass production, and the composite filter material product has good flexibility as well as high efficiency and low resistance air filtration performance and can be applied to the field of efficient air purification.

The invention discloses a preparation method of pomegranate-shaped organic-inorganic nano-composite microspheres, which comprises the following steps: mixing an aqueous dispersion solution of silicon dioxide modified by proper amount of double-bond silane coupling agent in a coupling method with a phenylpropyl monomer, anionic emulsifier, non-anionic emulsifier and water, and stirring simply, so that a milky emulsified liquid is obtained; adding initiator to perform emulsion polymerization in the presence of silicon dioxide, so that the pomegranate-shaped organic-inorganic nano-composite microspheres with multiple silicon dioxide particles wrapped in phenylpropyl emulsion particles are obtained finally and are stably dispersed in the emulsified liquid. The preparation method has the advantages that the sources of the raw materials are extensive, the raw materials are easy to obtain, the preparation process is simple, and moreover, in the prepared pomegranate-shaped organic-inorganic nano-composite microspheres, the wrapping rate of silicon dioxide is high, the structure is neat and the placement stability is good. The adhesion property and the film forming performance of the composite microsphere particles are adjustable, the adhesive force and the transparency of the corresponding glue film are good, and the organic-inorganic nano-composite microspheres can be applied to the fields of coating, textile, rubber, plastics, biology, medicine and the like.

The invention relates to a poly epsilon-CL/ poly N-alkyl acrylamide graft multipolymer and an application of the same. The graft multipolymer is a random copolymer copolymerized by 4-carbonyl group-epsilon-CL and epsilon-CL through the random copolymerization and has a molecular weight of between 10,000 and 100,000 as well as is obtained by the reduction reaction and the esterification reaction with the polymer shown by the expression C, wherein, R1, R2 and R3 are respectively selected from one of H or C1-C6 alkyl; moreover, at least one of R2 and R3 is C1-C6 alkyl; the molecule weight of the polymer shown by the expression C is between 1,000 and 20,000; n is between 1 and 6.

The invention relates to a preparation method of shape-controlled micro-nano ZnO under normal pressure and low temperature conditions. The preparation method comprises the following steps: dissolvinga zinc salt in a mixed solution of dimethyl formamide and water to obtain a zinc salt solution, adding oleylamine, reacting under the condition of normal pressure and the temperature of 80 to 90 DEG C, centrifugally separating, washing, and freeze drying, thus obtaining the shape-controlled micro-nano ZnO. The preparation method is simple and easy, the used raw materials are easy to obtain, the cost is low, and the prepared micro-nano ZnO is high in structure and shape controllability; and by using a conventional heating way, the preparation method is performed in a low-temperature normal pressure open system, so that the high temperature and the high pressure which are necessary to use in a hydrothermal method or a solvothermal method can be avoided, the safety is high, and the energy issaved.

The invention provides a biomass fiber-based three-dimensional porous material and a preparation method thereof. The biomass fiber-based three-dimensional porous material comprises biomass fibers, wherein the biomass fibers are mutually cross-linked and supported to form a three-dimensional network structure. The preparation method of the biomass fiber-based three-dimensional porous material is characterized by comprising the following steps: purifying the biomass raw materials; activating the purified biomass materials; preparing a biological cross-linking agent solution, and dispersing the biomass materials in the solution through an orientation high-speed pulping method to form uniform dispersion liquid of biomass fibers with draw ratio of 10-30000; and molding the dispersion liquid to obtain the biomass fiber-based three-dimensional porous material. The biomass fiber-based three-dimensional porous material has the advantages of being wide in raw material selectivity, free of pollution, simple in preparation process, low in cost and controllable in structure, and having huge application value in the fields of biomedical application, tissue engineering, energy sources, environment protection and aerospace.

The present invention discloses a three-dimensional hollow carbon foam electrode materials, a preparation method of the three-dimensional hollow carbon foam electrode materials and an application of the three-dimensional hollow carbon foam electrode materials. The method concretely comprises the following steps: mixing zinc nitrate, fuel and deionized water to perform full stirring and dissolution, putting the mixed solution on an electric furnace for heating until viscidity cementing products are obtained, the products are arranged in a muffle furnace for annealing to obtain zinc oxide template materials with multi-stage holes, and preparing charcoal electrode materials with multistage apertures through adoption of a template method. Compared to the prior art, the reaction materials are wide in source, low in cost and environmentally friendly, the synthesis steps are simple, the raw materials is nontoxic and safe and mild in reaction condition, and the method for removal of temperature materials is unique so as to fit large-size production and commercialization application. The prepared multi-stage hole carbon materials have multistage aperture structures having micropores, mesoporouses and macroporouses, large in specific surface area, have excellent charge and discharge multiplying power characteristics and cycle stability in an application and can satisfy the application requirement of an electrochemistry power storage device.

The invention relates to a multi-combination functional electrostatic spinning sub-micron fiber air filtering material and preparation thereof. The material is of a sandwich structure formed by sequentially arranging a spun-bonded non-woven fabric, a sub-micron fiber/microsphere composite film and a spun-bonded non-woven fabric. The preparation method comprises the following steps: preparing a low-concentration electrostatic spinning solution with additional functionality, preparing a high-concentration electrostatic spinning solution with additional functionality, preparing an electrostatic spraying polymer solution with additional functionality, preparing a sub-micron fiber composite membrane/non-woven fabric composite material, and preparing the sub-micron fiber air filtering material. The preparation method has simple and controllable process parameters, and the prepared filter material has good structural controllability.

The present invention discloses a method for synthesis of mesoporous molecular sieve and byproduct cryolite by use of fluosilicic acid. The aminated fluosilicic acid amide is added into a surfactant solution, heated, stirred, and uniformly dispersed; solution pH is adjusted to 3-7 with queous ammonia, and the solution is stirred and refluxed; the solution is filtered by suction and separated; the resulting filter cake is washed and dried to obtain a surfactant-containing mesoporous molecular sieve precursor, and mesoporous molecular sieve Si-MMS is obtained by pickling or roasting; if the fluorosilicic acid is mixed with an aluminum source or a titanium source, corresponding Si / Al-MMS or Si / Ti-MMS molecular sieve can be obtained; the resulting filtrate is treated with aqueous ammonia to adjust the pH to 4-7, the aluminum source is added, the pH is adjusted to 2 with an acid, the filtrate is heated to 50-100 DEG C and is thermally insulated for 10-50min; sodium sulfate solution is added, and the filtrate is thermally insulated for 0.5-1.5 h at 50-90 DEG C; and the filtrate is filtered, and the filter cake is washed, and dried to obtain the cryolite. According to the method, silicon as a silicon mesoporous material precursor is recycled, silicon recovery rate reaches 100%; fluorine in the filtrate is directly prepared into the cryolite, and the fluoride recovery rate reaches 98%.

The invention discloses an antioxidation/heat insulation integrated composite coating which is of a multilayer stacking structure and sequentially comprises a metal transition layer, a rare-earth silicate layer and a rare-earth zirconate layer from inside to outside. The invention further provides a polyimide composite coated with the composite coating. The polyimide composite comprises a fiber-reinforced polyamide resin matrix composite and a composite coating which is applied to the surface of the fiber-reinforced polyamide resin matrix composite; and the composite coating is the antioxidation/heat insulation integrated composite coating. The invention also provides a preparation method of the polyimide composite coated with the composite coating correspondingly. With the adoption of theantioxidation/heat insulation integrated composite coating, the long-time high temperature oxidation resistance and the short-time high temperature ablation resistance of the polyimide composite coated with the composite coating can be improved effectively, so that the application scope of the polyimide composite coated with the composite coating in the field of aviation and aerospace crafts is widened.

The invention discloses a fluorescent chemical compound. The chemical formula is C8H18N2Br3Mn0.5. The crystal of the fluorescent chemical compound belongs to a trigonal system and a Pa-3 space group at the temperature of 296 K. The invention further provides a preparing method of the fluorescent chemical compound. Soluble salt containing Mn2+ and triethylene diamine derivative are mixed, and solution natural volatile solvent is adopted to prepare the product through self-assembly. The red fluorescent chemical compound is obtained through preparation, the adopted material preparing process is simple and easy to operate, the raw materials are abundant in source, and the preparing method is low in production cost and high in yield and repeatability; thermal decomposition temperature point is high, and the crystal is uniform in particle size.

The invention discloses preparation, representation and application of a divalent manganese fluorescent material based on dibromo 1, 4-diethyl-1, 4-diazabicyclo [2, 2, 2] octane. A chemical formula of the fluorescent compound is C10H22N2Cl4Mn. At temperature of 296K, and crystals belongs to an orthorhombic crystal system, and P212121 chiral space group; the divalent manganese fluorescent material is prepared by mixing soluble salt containing Mn2+ and a triethylene diamine derivative and adopting a solution natural volatilization solvent for self-assembly. The green fluorescent compound is simple in material preparation process, easy to operate, sufficient in raw material source, low in production cost, high in yield and repeatability, relatively high in thermal decomposition temperature point and uniform in crystal particle.