41results about How to "Cheap and easy to prepare" patented technology

The present invention includes methods for producing magnetic nanocrystals by using a biological molecule that has been modified to possess an amino acid oligomer that is capable of specific binding to a magnetic material.

The invention belongs to the field of pesticide detection, and relates to a method for analyzing and detecting four kinds of heterocyclic pesticides in an environmental water sample. The four kinds of heterocyclic pesticides comprise carbendazim, triazolone, chlorfenapyr and fenpyroximate. The method for analyzing and detecting the four kinds of heterocyclic pesticides in the environmental water sample comprises the following steps: preparing amino ferroferric oxide by taking ferric trichloride hexahydrate as a raw material with the assistance of ethylene glycol, sodium acetate and ethanol amine; preparing a magnetic metal organic framework MOF-5 from the prepared amino ferroferric oxide; measuring the four kinds of heterocyclic pesticides by taking the prepared magnetic MOF-5 as a magnetic solid-phase extraction material and taking an efficient liquid chromatography as a measuring instrument. The method has the advantages of easiness and convenience in operation, adoption of readily-available raw materials, high accuracy of measuring result, average recycling rate of 80.30 to 108.33 percent, relative standard deviation of 2.96 to 7.94 percent, good extraction effect, accurate analysis result, high reproducibility and wide market prospect.

The invention discloses a preparation method and application of quaternary ammonium salt-N-halamine nano antibacterial fibers. The preparation method includes: performing activation preprocessing on natural fibers, allowing the activated natural fibers to have grafting reaction with a multi-amino polymer compound or a multi-amino multi-sulfydryl polymer compound, then grafting with quaternary ammonium salt, using a crosslinking agent to perform crosslinking, and bleaching to obtain the quaternary ammonium salt-N-halamine nano antibacterial fibers. The prepared quaternary ammonium salt-N-halamine nano antibacterial fibers have contact type and release type bifunctional antibacterial functions and are capable of increasing sterilizing speed, capable of achieving sterilizing under normal temperature, high in sterilizing performance, lasting in effect, less prone to tolerance generation, widely applicable to many fields such food packages, food fresh-keeping, medical equipment, public sanitation and water purification systems and promising in application prospect.

The invention belongs to the field of antibiotic detection, and relates to a method for analyzing and determining four sulfonamide antibiotics in a water sample. A negative pressure suction filtrationmembrane solid phase extraction technology is utilized, and a metal organic framework material NH2-MIL-101(FE) membrane solid phase extraction-high performance liquid chromatography method is adoptedto determine four antibiotics such as sulfadiazine, sulfamethazine, sulfachloropyridazine and sulfamethoxazole in an environmental water sample. The method is simple, convenient, rapid and sensitiveto operate, and has the advantages of low detection limit, accuracy and good reproducibility; and moreover, the raw materials are cheap and easy to obtain, the material preparation process is simple,the reaction conditions are mild, the application environment is friendly, and the market prospect is wide.

A structure having a characteristic of conducting or absorbing electromagnetic waves contains a base material having a characteristic of conducting or absorbing electromagnetic waves, a pressure-sensitive adhesive layer or an adhesive layer formed on at least one surface thereof, and a fiber convex structure section having a characteristic of conducting or absorbing electromagnetic waves formed on the pressure-sensitive adhesive layer or adhesive layer on the at least one surface of the base material in a form that at least a part of a fiber thereof is positioned outward from the surface of the pressure-sensitive adhesive layer or adhesive layer.

The invention relates to a method for analyzing and determining four heterocyclic pesticides in a water sample, and belongs to the field of pesticide detection. The method specifically comprises the following steps: preparing a metal organic framework material MIL-53 and an MIL-53 membranes; and analyzing four phenoxy carboxylic acid pesticides in the water sample by using solid-phase extraction via the metal organic framework material MIL-53 in combination of high performance liquid chromatography. The organic framework material MIL-53 with high adsorption efficiency for the four phenoxy carboxylic acid pesticides is used, and serves as a membrane solid-phase extraction material, a high performance liquid chromatography-ultraviolet fluorescence detector is adopted, the analysis method ofthe four phenoxy carboxylic acid pesticides in the water sample is established, the method is simple and convenient to operate, the analysis time and cost are greatly reduced, the extraction effect isgood, the analysis result is accurate, and the reproducibility is good; and raw materials are cheap and easy to obtain, the material preparation process is simple, the reaction conditions are mild, the application environment is friendly, and the market prospect is wide.

The present invention provides cross-linked fracture fluids that allow for reusing return water with no treatment, minimizing the environmental impact thereof and reducing the use of fresh water to very low levels to stimulate wells or re-stimulate wells stimulated in the past. Preparation and use methods of said fluids in fractured subterranean formations drilled by wells, based on return water, production water, sea water, fresh water and mixtures thereof, are provided. Fluids are basically composed of: return water, production water, sea water, fresh water and mixtures thereof present in a sufficient amount to moisten the gelling agent and to form a gellified aqueous agent; a gelling agent; an iron control agent; an alkaline buffer; a delayed cross-linking agent, and a rupture system to “break” the fluid and improve fracture cleaning.

The invention relates to a battery preparation technology, and aims to provide a method for preparing a lithium titanate coated aluminum lithium ion battery negative pole material. The method comprises the following steps of: placing lithium titanate sol in a hydrothermal reaction kettle, adding spherical aluminum powder, stirring and then sealing; after the reaction, taking a reaction product out, and performing filtration, centrifugal separation and vacuum drying to obtain a lithium titanate-aluminum composite material precursor; placing the lithium titanate-aluminum composite material precursor in a muffle furnace, setting calcination temperature as 500 DEG C under the protection of a nitrogen atmosphere, and setting heating rate as 4 DEG C min<-1>; and after the set temperature is reached, preserving heat for 5 hours to obtain a lithium titanate coated aluminum composite material, namely the lithium titanate coated aluminum lithium ion battery negative pole material. According to the method, an organic electrolyte can be safely applied to a battery through a steady charge-discharge voltage platform. The lithium titanate coated aluminum lithium ion battery negative pole material is high in electrode reaction reversibility, high in chemical stability and thermal stability, low in cost, easy to prepare, and pollution-free.

The invention provides a preparation method of a lithium battery fire gel dry water fire extinguishing agent. The preparation method comprises the steps of adding gellan gum, gelatin, carrageenan, agar and polyvinyl alcohol into deionized water, and stirring to obtain a mixed sol solution; uniformly mixing the mixed sol solution with a water glass solution; slowly dropwise adding a concentrated strong acid solution into the uniformly-mixed mixed solution until the pH value reaches 7 to 9 to form hydrogel; and crushing the hydrogel, adding the hydrophobic silicon dioxide and the crushed hydrogel into a stirrer to be stirred to obtain the gel dry water fire extinguishing agent. The gel dry water fire extinguishing agent is good in stability and convenient to store and transport; the flowability, dispersity and cooling performance are good, and rapid fire extinguishing and continuous cooling are facilitated; and the fire extinguishing agent is non-toxic, harmless, free of secondary pollution, non-conductive, easy to clean after fire extinguishing, and beneficial for inhibiting reburning of a lithium battery fire.

Filter substrates are each provided with multiple protruding parts, and the disclosed humidifier filter comprises multiple such filter substrates which are laminated together and used as a humidifier filter laminate body. Said protruding parts are formed by applying pressure to portions of the substrates. Even using light-weight thin film-shaped filter substrates in the humidifier filter, space can be secured between neighboring humidifier filters. By this means, the filter substrates are not prone to damage during the manufacturing process, and humidification is not decreased.

The invention discloses a method for nondestructive recovery of a reinforcement in waste carbonyl-containing thermosetting resin under mild conditions and belongs to the technical field of polymer composite degradation. The specific scheme comprises the following steps: step 1, mixing the waste carbonyl-containing thermosetting resin with an alkaline solution, and heating to obtain a liquid-phase product and a gel-state solid-phase product; 2, regulating swelling of a solid-phase product in a gel state in different solvents to enable the solid-phase product to have viscosity, and removing resin on the surface of the reinforcement by adopting a physical separation mode after drying to obtain a precursor of the reinforcement; step 3, further degrading the precursor of the reinforcement by adopting an advanced oxidation technology, and recovering to obtain the reinforcement. According to the invention, the reaction solvent is green, the degradation temperature is mild, and the energy consumption is reduced; the degradation process is rapid and efficient, the resin removal rate reaches up to 100%, nondestructive recovery of the carbon fibers can be achieved, and high-added-value carbon fiber resources are recycled; and the method has very important industrialization prospects.

The invention discloses an organic fertilizer for preventing bitter pits of apples. The organic fertilizer comprises soluble calcium salt, organic fertilizer liquor, an emulsifying agent and a thickening agent, wherein the organic fertilizer liquor is fermentation liquor of bean cakes, burnt rice bran powder and mushroom residues. The organic fertilizer disclosed by the invention has the beneficial effects that addition agents of the thickening agent, the emulsifying agent and the like are added to a mixed organic fertilizer of liquid calcium and organic matter, and emulsion having certain stickiness is prepared; and through a spraying manner, organic fertilizer liquor drops are uniformly sprayed onto apple surfaces, the liquor drops have definite stickiness and can be adhered to leaf surfaces or the apple surfaces, after moisture in the liquor drops evaporates, a transparent pot-shaped film can be formed on the leaf surfaces or the apple surfaces, the liquid calcium and the organic matter in the liquor drops can deposit in the film and can be slowly absorbed, long-acting slow-release effects are formed, the number of fertilizing times of a calcium fertilizer is reduced, and negative influence on soil caused by excessive fertilizing is avoided.

This invention relates to an algicide of excellent water solubility, low cost and excellent handling that is characterized in containing N-chloro-2-pyrrolidinone, as well as to an algicidal/microbicidal agent characterized in containing one or more compounds selected from cyclic N-chloro compounds and N,N'-dichloro compounds represented by formula (1). (1) (In the formula, X represents a methylene group, secondary amino group, or N-chloro group, and R represents a C2-5 alkylene group, provided that when X is an N-chloro group, R is a C2-3 alkylene group).

The invention relates to the use of ferroportin inhibitor compounds of the general formula (I) for preventing and treating kidney injuries, such as in particular acute kidney injuries, and the symptoms and pathological conditions associated therewith.