124results about How to "Fast preparation process" patented technology

The invention discloses a method for preparing a lignin urea-formaldehyde pesticide microcapsule. According to the invention, the method comprises the following steps: taking modified lignin, formaldehyde and urea as a monomer, forming a water-soluble performed polymer under base catalysis, diluting and forming continuous phase, forming dispersed phase by pesticide, an organic solvent and a surfactant, mixing and stirring the continuous phase and the dispersed phase to form an oil-in-water emulsion, performing in situ condensation polymerization under the acidic condition, heating and solidifying, pumping filtration and washing, drying to obtain the solid microcapsule particles. The modified lignin is obtained by formaldehyde hydroxymethyl modification of the industrial grade wheat straw soda lignin. According to the invention, the waste wheat straw soda lignin in paper industry is taken as the main wall material, so that the production cost of the microcapsule can be effectively reduced and the resource utilization of waste biomass can be realized. The preparation method of the invention has the advantages of simple process, rapidity and controllable microcapsule particle size, and is capable of realizing the industrial production, increasing the pesticide utilization rate, prolonging the persistent period, minimizing the environmental pollution in the process of agriculturalproduction, reducing the agriculture production cost and the like, and has good market prospect.

The invention relates to a boron nitride composite mesoporous oxide nickel-based catalyst and a preparation method thereof. The nano-boron nitride as the carrier having high thermal stability and carbon deposition resistance is combined with active metal anchoring and dispersion based on mesoporous oxides so that the catalytic material having high resistance to sintering and carbon deposition is obtained. The preparation method comprises adding a surfactant and ammonia water into high thermal stability boron nitride and nickel precursors as reactants, carrying out ultrasonic agitation, loading active metal components to the boron nitride nanosheet layer, and carrying out in-situ coating on the surface with an oxide having a mesoporous channel structure. The coated mesoporous structure can realize high dispersion of the active nickel component. Through drying, high temperature calcination and programmed heating reduction, the nickel-based catalyst having high performances and a novel structure is prepared. The boron nitride composite mesoporous oxide nickel-based catalyst has the advantages of simple process, low production cost, no environment pollution and high catalytic efficiency.

A process for preparing the organic aerogel and its carbon aerogel includes such steps as reaction between resorcin, formaldehyde, organic surfactant and catalyst in water, thermal solidifying to obtain organic gel, natural cooling or baking to obtain organic aerogel, and charring in inertial gas to obtain carbon aerogel.

The invention discloses a method for preparing graphene through reduction of oxidized graphene. The method comprises the steps of under ultrasonic-assisted stirring, reducing the oxidized graphene with alkali metal or alkaline earth metal as a reducing agent and iodine as an initiator, and separating and purifying to obtain the graphene. The method has the advantages of short reaction cycle, simple operation, high efficiency, no pollution, low cost, good product quality and the like.

The invention discloses a supported photocatalyst with high activity under visible light and a preparation method thereof. The preparation method is characterized by comprising the steps of: preparing a polyvinyl alcohol-titanium dioxide composite film by using a sol-gel method, and subjecting the polyvinyl alcohol-titanium dioxide composite film to a certain thermal treatment. A polymer is combined with an inorganic matter by using chemical bonds to form a mutually-crosslinked net structure which has better film-forming performance and can be loaded on inorganic carriers such as glass, ceramic, silicon gel, metal and the like. The method has the advantages of wide sources of raw materials, lower cost and simple and controllable preparation process; and the prepared photocatalytic material under the visible light and can be used for effectively degrading organic pollutants.

The invention relates to the field of pharmaceutical chemical synthesis, in particular to a preparation method of flurbiprofen and a preparation method of flurbiprofen axetil. The preparation method of the flurbiprofen comprises the steps of carrying out a Grignard reaction by using 4-bromine-2-fluorine biphenyl as a raw material, carrying out a coupling reaction, and acidizing to obtain the flurbiprofen; the yield is 90%, and the purity is 99.5%; then, the flurbiprofen axetil is prepared by using the flurbiprofen, obtained by the method, as a raw material, the yield reaches up to 90%, and thepurity reaches up to 99.5%. The preparation methods are high in quality controllability and industrial reproducibility.

The invention relates to production of a genetic engineering drug by a recombinant DNA technology, belongs to the biotechnical field, and particularly relates to a purification method of a recombinant human vascular endothelial growth factor receptor-antibody fusion protein, that is to say, a cell supernatant containing the recombinant human vascular endothelial growth factor receptor-antibody fusion protein is successively subjected to affinity chromatography, anion exchange chromatography, cation exchange chromatography, hydrophobic chromatography and desalination chromatography to obtain the high-quality recombinant human vascular endothelial growth factor receptor-antibody fusion protein. The purification method has the characteristics of low cost, high purity of the target protein, easily controlled technological process, easily large-scale enlarged production and the like.

The invention relates to distilled bitter buckwheat wine and a preparation method of the distilled bitter buckwheat wine, and belongs to the technical field of wine brewing. The preparation method comprises the following steps: (1) preparing raw materials of bitter buckwheat and rice; (2) washing and soaking; (3) gelatinizing steamed materials; (4) performing culture saccharification; (5) preparing yeasts; (6) fermenting; (7) distilling until the alcohol content of mixed wine liquid is 55-65% (V) to obtain base liquor and end liquor in sequence, separately receiving the base liquor and the end liquor, and after the distilling process is finished, recovering distilled grains; (8) ultrasonically extracting distilled grain flavones to obtain distilled grain crude extract liquid; (9) performing macroporous resin purification on distilled grain flavones to obtain flavone extract liquid; (10) mixing the flavone extract liquid, the base liquor and the end liquor, and checking until the quality standards are met to obtain the distilled bitter buckwheat wine. According to the preparation method, flavone substances remained in the bitter buckwheat distilled grains are fully utilized while unique flavor of the bitter buckwheat wine is retained, and the distilled end liquor is recycled, so that the healthcare effect of the bitter buckwheat wine is improved and the utilization rate of the bitter buckwheat is greatly increased.

The invention relates to a rice metabolism detecting reagent and method, concretely used in the condition of detecting rice metabolism. It mainly takes and dissolves nitrazine yellow / chlorophenol red, p-nitrophenol, bromocresol green / bromothymol blue / resorcinol blue, bromocresol purple, and hematoxylin / cresol red / bromophenol red / methyl red into alcohol, and mixing them uniformly to obtain finished product of raw reagent liquid. As detecting, taking a raw reagent liquid and adding distilled water to dilute the raw reagent liquid so as to form a liquid reagent, adding rice to the liquid reagent to react, observing the colors of rice and solution, judging the metalolism degree of the rice detected, the metabolism situation and color of the rice corresponds to green and passes through yellow and salmon pink into red region, where the green expresses new rice, yellow expresses old rice and salmon pink expresses deeply aged rice. The reagent of the invention is lower-cost and has simple manufacturing process; the operation is quick, accurate and convenient; the detecting method is simple, able to be used in both qualitative detection and quantitative detection.

The present invention discloses a flexible conductor and a preparation method thereof. The flexible conductor comprises an elastic sponge, liquid metal filling the hole of the elastic sponge and a silicone rubber configured to package the elastic sponge. The problems are solved that the flexible conductor is tedious in manufacturing technology and bad in performances in the prior art.

The invention relates to the field of composite material preparing, and discloses a pressure infiltration preparing method for a metal matrix composite material. The method comprises the steps that materials are prepared, the materials are sequentially arranged in a wrapping sleeve, the wrapping sleeve is placed in a die, the die is placed in a hot press device, the position of the die in the hot press device is adjusted, preparing is conducted according to certain temperature and pressure parameters, and finally the metal matrix composite material with the good performance is obtained. According to the preparing technology, the composite material with components comprising the high volume fraction constituent elements hard to dissolve can be simply, rapidly and economically prepared; by means of the technology method, the obtained composite material has high stacking density and material consistency, and the interface bonding force between the constituent elements of the obtained composite material is high.

The invention discloses an agricultural microbial agent microcapsule based on cell membrane mimicking and a preparation method thereof. The effect of regulating the osmotic pressure of cells is realized by regulating the moisture content of microbial cells and the flux of oxygen; and the wall material of the microcapsule is selected from gamma-polyglutamic acid (gamma-PGA), a polysaccharide material and dopamine. The gamma-PGA can achieve a synergistic effect with a microbial agent so as to enhance the antioxidant ability of plants, alleviate damage to plants under abiotic stress and promote plant growth, and is a typical microorganism-derived biostimulant; and a compact film formed by auto-polymerization of the dopamine on the surfaces of bacteria can effectively relieve the influence ofexternal osmotic pressure on the bacteria in the microcapsule, and polymerization reaction conditions are mild and have small damage to the bacteria. The preparation method disclosed by the inventionis based on a cell surface polymerization technology, and can realize single-cell coating of the microbial agent and inhibit proliferation of the microbial agent.

The invention discloses a microalloyed magnesium alloy sheet with high formability and a preparation method thereof, and belongs to the nonferrous metal material and machining field, which solves theproblem of poor room temperature plasticity existing in magnesium alloy sheets. The microalloyed magnesium alloy sheet with high formability comprises, by mass percent, 0.5-1.0% of zinc, 0.3-0.6% of ytterbium, 0.2-0.4% of zirconium, and the balance magnesium and inevitable impurity elements. A weak base surface texture is showed through the sheet formed by synchronous cross rolling, the elongations in the rolling direction, 45-degree rolling direction and transverse direction are about 30%, the erishen value is 8.11 mm, and the room temperature formability is good. The key preparative techniques comprise smelting, casting, rolling and annealing, and has the advantages of being efficient, rapid, low in cost, high in operability, good in process stability, capable of realizing batch production easily, energy-saving and environment-friendly.

The invention provides an in-situ polymerized surface modified fiber-based friction nano-generator and a preparation method thereof. The in-situ polymerized surface modified fiber-based friction nano-generator is characterized by comprising a friction electropositive nanofiber membrane having in-situ constructed silica nanoparticles (SiO2 NPs) on a surface, and friction electronegative nanofiber membrane having in-situ constructed polytetrafluoroethylenen nanoparticles(PTFE NPs). The surface charge of the friction nano-generator after in-situ polymerized surface modification is expected to increase by 10 to 300%, the short-circuit current is expected to increase by 20 to 300%, and the open circuit voltage is expected to increase by 50 to 300%. The friction nano-generator of the invention has high electric output performance, small volume, simple structure and short preparation process. With the further improvement of its performance, the friction nano-generator will have a broader prospect in the field of wearable electronics.

The invention discloses a preparation method of a micro-nano silver / chitosan composite antibacterial agent. According to the preparation method, on the basis of the characteristic of rapid microwave heating, silver nitrate is taken as a silver source, water is taken as a solvent, and spherical micro-nano silver particles are successfully prepared in a shorter time with direct utilization of reducibility of PVP (polyvinylpyrrolidone) in preparation under the condition of only PVP addition without other reducing agents; the spherical micro-nano silver particles are loaded to chitosan polymers bycoordination, the micro-nano silver / chitosan composite antibacterial agent is prepared and added to antibacterial body care products, and antibacterial performance is adjusted by changing adding quantity and strain categories of the composite antibacterial agent. The preparation technology is not reported, compared with a conventional chemical reduction method, the method has advantages that a synthetic reaction is performed rapidly, other reducing agents are not needed, the preparation technology is simplified, raw materials are saved, and water serving as the solvent is cleaner, so that onerapid, simple, efficient and environment-friendly method is provided for preparation of micro-nano silver.

The invention relates to a method for preparing organic airgel and carbon airgel by normal pressure drying method. In this method, resorcinol and furfural are used as reaction monomers, hexamethylenetetramine is used as a catalyst, organic reagents such as isopropanol are used as solvents, and organic gel is obtained by heating and curing; then, it is directly dried or heated under normal pressure. Organic aerogels are obtained by drying; afterward, charcoal aerogels with high specific surface area are obtained by carbonization in an inert atmosphere. The carbon airgel preparation process of the present invention avoids the complex process of the conventional supercritical drying method, the technology is simple, fast, and has low equipment requirements, and can realize the industrialized production of the carbon airgel.

The invention provides a method for forming pleats on the surface of an elastomer film. The method comprises the following steps: (1) forming a nanowire network on the surface of a hard substrate as atemplate; (2) covering the nanowire network containing surface of the template with a flowing elastomer material until the elastomer material is filled into all voids of the nanowire network and attached to the hard substrate; (3) curing the elastomer material; and (4) removing the hard substrate so as to obtain the elastomer film with a nanometer pleat containing surface. According to the invention, the nanowire network constructed by nanowires or nanofibers is transferred into the elastomer film; a nano-scale pleat structure is prepared on the surface of the elastomer film in a large area;and the morphology of nanometer pleats is simple and convenient to be adjusted and controlled. By utilization of the method provided by the invention for preparation of a pleat structure, no micro-nano processing technologies like photolithography, nanoimprinting and electron beam lithography are needed; and the method provided by the invention is simple and rapid in preparation process and has low cost and good repeatability.

The invention discloses C-14-marked graphene and a synthetic method thereof, and belongs to the field of synthesis of graphene. The method comprises the following steps: (1) in water bath, adding a dodecyl amine ethanol solution into a mixed solution of ferrous chloride tetrahydrate and ammonium dihydrogen phosphate, centrifugally collecting the obtained solid product, carrying out vacuum drying, grinding the dried solid product into powder and placing the powder into a crucible; (2) adding a C-14-marked phenol ethanol solution into the powder obtained in the step (1), uniformly mixing, carrying out vacuum drying, taking out the crucible, placing the crucible into a tube furnace and calcining under the protection of argon; (3) taking out the generated black powder product, adding the black powder product and concentrated hydrochloric acid into a hydrothermal kettle together, heating after sealing, carrying out centrifugation to obtain the black solid product, washing, flushing by absolute ethyl alcohol, and carrying out vacuum drying to obtain the C-14-marked graphene powder. When the original characteristics of the graphene are almost completely kept, the graphene synthesized by the method disclosed by the invention is marked with a C-14 isotope and adopts a simple and rapid process.

The invention discloses a heavy metal biological adsorbent and a preparation method of the heavy metal biological adsorbent. The biological adsorbent takes boletes as main ingredients and is prepared in the following steps that the boletes of various types and parts are selected, cleaned, separated, dried, smashed, sieved and the like. The biological adsorbent can be used for specific adsorption of heavy metal in various media, and is simple and fast in technology, low in equipment requirement and cost, simple and convenient to use, and high in adsorption efficiency.

The invention discloses a preparation method for nano-particles with metal-carbon core-shell structures. The preparation method comprises the steps of: firstly adding a metal target into an organic solution; introducing inert gas; ablating the metal target by using a laser device under a stirring condition; then adding the obtained laser-ablated product into a sulfuric acid solution; introducing the inert gas; heating and stirring the solution; and cooling the solution to obtain the nano-particles with metal-carbon core-shell structures. The preparation method disclosed by the invention is simple in process, fast, good in repeatability and green and pollution-free; and the obtained nano-particles with metal-carbon core-shell structures are high in purity and uniform in shape, carbon fluorescence is enhanced, and the nano-particles can be regulated.

The invention relates to the technical field of a series special flavor natural milk aroma base material and a preparation method, and especially relates to the preparation method for a special flavornatural milk aroma base material capable of simultaneously preparing a variety of flavors such as a light cheese flavor, mozzarella cheese, cheddar cheese and cream cheese, and a natural milk aroma base material; the preparation method includes the following steps: 1) sterilizing a preparation material; 2) adding lipase after cooling for performing enzymatic hydrolysis; 3) adding protease after enzyme deactivation for performing the enzymatic hydrolysis; and 4) absorbing an upper layer oil phase by centrifugation after the enzyme deactivation to obtain a final product; The product obtained bya two-step enzymatic hydrolysis method has the characteristics of tenderness and smoothness, fineness, richness, purity, and aroma improvement, and satisfies people's increasing demand for flavor andmouthfeel of foods.

The invention relates to a high-molecular composite-sphere moisture-absorbing material modified by an inorganic salt. The high-molecular composite-sphere moisture-absorbing material is characterized in that a base material is super absorbent resin, the modifying material is the inorganic salt, and a mass ratio of the base material to the inorganic salt ranges from 1:3.5 to 1:9.0. The invention also discloses a preparation method of the high-molecular composite-sphere moisture-absorbing material modified by the inorganic salt. The high-molecular composite-sphere moisture-absorbing material andthe preparation method have the beneficial effects that the inorganic salt is adopted as a modifying agent, and is compounded with high molecules to form a gap structure, so that the specific surfacearea of resin spheres is enlarged, the moisture absorption property of the material is obviously improved, and the inorganic salt can be used as a loading material to further improve the property of the high-molecular composite-sphere moisture-absorbing material; the prepared composite particle sphere has the advantages that the moisture-absorbing amount and the moisture-absorbing rate in 10 hoursare increased by 7 times or more compared with those of original resin, the moisture-absorbing speed is 9 times or more of that of the original resin, and the diameter and the density of the high-molecular composite-sphere moisture-absorbing material can be adjusted and controlled.

The invention provides a preparation process of a UPE filter membrane. The process comprises the following steps: preparing a mixed material, wherein the mixed material comprises polyethylene resin and a solvent system, the polyethylene resin at least comprises ultra-high molecular weight polyethylene with a mass average molecular weight of more than 3 million, and the solvent system comprises a solvent compound A and a non-solvent compound B; then heating, melting and mixing the mixed material to form a membrane casting solution; extruding through a die head to form a liquid membrane, wherein along with the reduction of the environment temperature, the liquid membrane is subjected to split-phase curing to form two raw membranes with holes in the outer surfaces different in aperture size; and carrying out synchronous stretching, first heat setting, extraction and second heat setting on the raw membrane to obtain the UPE filter membrane with the required membrane structure. According to the invention, the UPE filter membrane is an asymmetric membrane, has excellent trapping performance on impurity particles with the particle size of 1-30 nm, and is high in interception efficiency; the filtering speed is high, the time required for fluid to pass through the filter membrane is short, and the time cost is low; and the UPE filter membrane is especially suitable for the field of photoresist.

The invention discloses a method for synthesizing beta-cyclodextrin conjugated charcoal by a microwave-assisted one-pot method and an application thereof, and relates to a method for synthesizing beta-cyclodextrin conjugated charcoal by a microwave-assisted one-pot method and an application thereof. The invention provides a method for synthesizing beta-cyclodextrin conjugated biochar by a microwave-assisted one-pot method and an application thereof, and the beta-cyclodextrin conjugated biochar is synthesized by the microwave-assisted one-pot method and is used for simultaneously adsorbing BPAand Pb (II) in industrial wastewater. The method comprises the following steps: putting rice hull powder into a sulfuric acid solution, uniformly mixing, standing, washing the mixture by distilled water until the mixture becomes neutral, drying the mxiture to obtain dried rice hull powder; heating and pyrolyzing the dried rice hull powder to obtain rice hull biochar; adding sodium hydroxide powderand beta-cyclodextrin into distilled water, adding the rice husk biochar and glutaraldehyde, uniformly mixing, putting the solution in a microwave reactor, and carrying out reactions under stirring to obtain the beta-cyclodextrin conjugated biochar. The method for synthesizing the beta-cyclodextrin conjugated charcoal by the microwave-assisted one-pot method and the application thereof can be obtained.

The invention discloses a feeding antibacterial dodecapeptide from pig lysozyme and a preparation method of the feeding antibacterial dodecapeptide, belonging to the field of bioengineering. The preparation method comprises the steps of preparation of a crude extracting solution, separation of a gel filtration chromatography column Superdux Peptide 10 / 300GL and separation and purification of a reversed-phase column Phenomenx luna C18. Through LC-MS (Liquid Chromatography-Mass Spectrometry) identification, the amino acid sequence of the antibacterial dodecapeptide is G-V-S-L-A-N-W-V-C-L-A-K; the antibacterial peptide belongs to an alkaline peptide, has remarkable resistance for gram-negative bacteria and is good complementation and expansion for an antibacterial spectrum of the pig lysozyme; through comparison with an antibacterial peptide database and the like, the antibacterial peptide has not been reported. A preparation process disclosed by the invention has the characteristics of simplicity and high efficiency; the purity of a product can reach 95 percent or higher through mass spectrum identification.

A preparation method of a folding filter element capable of removing heavy metals is characterized by comprising the following steps: (1) preparing a non-woven fabric from a fibrous polymer by utilizing melt-blowing equipment or electrostatic spinning equipment; (2) immersing the non-woven fabric into a reaction solution containing a heavy metal adsorbent for reaction to obtain a modified non-woven fabric; (3) washing the reacted non-woven fabric with pure water and drying; and (4) making the dried modified non-woven fabric into the folding filter element. Compared with the prior art, the folding filter element has the advantages that the removal effect is efficient and stable, the service life is long, the whole manufacturing process is simple, convenient and rapid, the cost is low, and large-scale production is easy to realize.

The invention generally relates to the technical field of environmental functional materials and water treatment, and provides a porous biochar / zinc ferrite composite material; porous biochar serves as a matrix, magnetic zinc ferrite particles are loaded on the surface, and the particle size of the magnetic zinc ferrite particles is 50-400 nm; the mass ratio of the porous biochar to the zinc ferrite nanoparticles is (1:1) to (1:2); the specific surface area of the porous biochar is 1000-1200 m<2>*g<-1>, the pore volume is 0.40-0.50 cm<3>*g<-1>, and the pore diameter is 3.00-3.50 nm. Crop strawis used as a raw material for preparing the porous biochar, ZnCl2 analytically pure and FeCl3.6H2O analytically pure are used for preparing zinc ferrite, nitrilotriacetic acid is used for modification in the compounding process of the zinc ferrite and the porous biochar, and the obtained porous biochar / zinc ferrite composite material can be used for adsorbing heavy metals in water and enhancing the adsorption effect of the zinc ferrite; and an adsorbing material can be recycled by magnetic separation.

The invention relates to a method for preparing mesoporous hydroxyapatite nanoparticles through combining microwave and gaseous diffusion. The method comprises the following steps: firstly, adding soluble calcium salt and soluble phosphate into water to form a mixed solution, and adjusting the pH of the mixed solution to be acidic with an acid; then transferring the acidic solution into a microwave reactor, carrying out microwave heating, diffusing ammonia gas to the reaction solution in the heating process, and then participating in a reaction; and finally, collecting a precipitate, namely the hydroxyapatite nanoparticles with a mesoporous structure. The method is green and economical, the used raw materials are all common chemical raw materials, and emulsifiers or template agents are not needed to be added during synthesis of the mesoporous hydroxylapatite nanoparticles. The obtained mesoporous hydroxylapatite nanoparticles have relatively high specific surface area, and can be used as an ideal adsorption material.