41results about How to "Preparation method saves time" patented technology

The invention relates to a method for preparing biodegradable polyester. Firstly, melt polycondensation is conducted through diol and dicarboxylic acid and a low molecular weight polyester prepolymer with number average molecular weight between 2, 000 and 20, 000 or intrinsic viscosity below 0.64dL/g is prepared; binary oxadiazoline and diacyl bis-caprolactamate are combined to extend chain, and chain extension is carried out at a certain temperature; and the biodegradable polyester is obtained. The number average molecular weight of polybutylene adipate (PBA) can reach up to 39, 000 and the intrinsic viscosity to 1.13dL/g. For poly (butylene succinate) (PBS) with relatively high melting point, the intrinsic viscosity after chain extension is up to 0.99dL/g.

The invention discloses an anticorrosive composition without any chemically synthesized preservative and application thereof, and cosmetics prepared from anticorrosive composition. The anticorrosive composition comprises dibasic alcohols and organic acids in a weight ratio of (15-25):(1-5). The anticorrosive composition has the characteristics of favorable anticorrosive property, low irritation, no side effect, favorable stability, high antibacterial capacity, simple preparation technique and the like, is beneficial to popularization and application, and can be applied to cosmetics and skin reagents.

The present invention discloses a titanium oxide micro-nanotube with a visible-light catalysis effect, and a preparation method thereof. The micro-nanotube is tubular titanium dioxide doped with sulfate in situ, the tube wall of the micro-nanotube is attached with nano-sheets formed by nanoparticles, and nano-mesopores are arranged between the nanoparticles. The preparation method comprises: mixing and stirring titanium sulfate hydrate, methanol and glycerol to obtain a mixing solution; then adding ether to the mixing solution, and stirring to obtain a precursor solution; placing the precursor solution in a sealed state, carrying out a reaction for 16-40 hours at a temperature of 105-115 DEG C, and then cooling to the room temperature to obtain a gel material; adding ethanol to the gel material, and stirring to obtain a gel mixture; carrying out treatments of ultrasound, centrifugation, washing and drying for the gel mixture to obtain an intermediate product; placing the intermediate product in the environment with the temperature of 450-550 DEG C to carry out annealing for at least 2 hours to prepare the titanium oxide micro-nanotube with the visible-light catalysis effect. The titanium oxide micro-nanotube of the present invention has significant photocatalytic properties in the ultraviolet region and the visible-light region, and can be widely used for degradation of organic pollutants.

The invention relates to a capillary effect assisted non-covalent assembled coating layer and a preparation method thereof. The coating layer is prepared from the raw materials of an inorganic nano material and flexible high-molecular polymer. The preparation method comprises the steps: pretreating a substrate material to obtain the pretreated substrate material; dipping the pretreated substrate material into an inorganic nano material solution to make the inorganic nano material form ultrahigh-quantity adsorption on the complex substrate surface under the capillary force assistance and drying; dipping an intermediate assembly into a flexible high-molecular polymer solution to achieve covalent bond assembling of the flexible high-molecular polymer and drying; repeating to obtain the high-load coating layer. The coating layer disclosed by the invention greatly exceeds deposition load capacity of traditional non-covalent assembling; meanwhile, stability of the assembled coating layer ismaintained; furthermore, an actual application field such as electromagnetic shielding of a nano-micro scale functional coating layer is expanded. In addition, the preparation technology disclosed bythe invention is simple, production cost is low, and the prepared coating layer has very good controllability on membrane structures and thickness.

The invention relates to a production method of a humic acid-containing water-soluble fertilizer capable of preventing greenhouse moss. The humic acid-containing water-soluble fertilizer capable of preventing greenhouse moss is obtained by mixing macroelement fertilizers, humic acid-containing organic matters, algicides, and the like in a closed environment. Breeding of moss in greenhouses can be prevented and the moss can be prevented from contending with commercial crops for nutrients by adding the algicides, thus achieving the maximum utilization rate of the fertilizer on crop absorption and reducing the fertilizer cost.

The invention relates to a Cr2O3/ZTA composite powder and ceramic and a preparing method thereof. The preparing method comprises the following steps that alumina powder, zirconium oxide powder and Cr(NO3)3.9H2O are mixed and subjected to ball milling, and mixed paste is obtained, wherein the mass fraction of alumina powder is 80-85% of the total mass of zirconium oxide and alumina, the balance 15-20% is zirconium oxide powder, and the adding amount of Cr(NO3)3.9H2O, converted base on Cr2O3, is 0-0.8% of the total mass of zirconium oxide and alumina; the obtained mixed paste is dried and then roasted at 400-600 DEG C, and Cr2O3/ZTA powder is obtained. The Cr2O3 additive is introduced in the mode of precursor Cr(NO3)3.9H2O, and thus Cr2O3 can be more evenly dispersed into ZTA powder.

The invention discloses a hafnate luminescent material which has the general formula of Y2-xHf7O17:Eux, wherein, X is 0.01-0.3; the invention also discloses a method for preparing the hafnate luminescent material, which comprises the steps: solid yttrium nitrate and hafnyl chloride are put into a container by taking the mol ratio of 3:25-3:10 as the mixture ratio and dissolved by distilled water; Eu(NO3)3 solution is added into the mixture, and the molar weight of Eu is 1%-30% of the molar weight of Y; the pH value of the solution is regulated to be 1 by using nitric acid; the blended fuel of glycin and urea is added into the solution, and ethylenediamine tetracetic acid (EDTA) having the mass accounting for millesimal of the total mass of the raw material is taken as chelating agent and added into the solution; the mixture is burnt in a furnace at the temperature of 450 DEG C to obtain precursor, and then sintered for 2 hours at 800 DEG C in a high temperature furnace, thereby obtaining the Y2-xHf7O17:Eux material. The material obtained by the invention can be used in an X-ray intensifying screen of high-energy physics, medical use or safety inspection. The preparing method has the advantages of safety, time-saving, energy-efficiency, etc.

The invention discloses a preparation method of a shape memory polymer material with a drug release function, a product obtained therethrough, and an application of the product. The preparation methodcomprises the following steps: (1) dispersing a drug and an amphiphilic triblock copolymer with a functionalized terminal double bond in a solvent, forming a nano-micelle or a nano-reverse micelle under the action of similar intermiscibility, and wrapping the drug in the nano-micelle or the nano-reverse micelle; and (2) adding a monomer and an initiator into the reaction system in step (1), and carrying out in-situ free radical polymerization to form the shape memory polymer material with the drug release function. The method has the advantages of simple operation steps, convenience and timesaving, and the obtained product has the advantages of high drug loading capacity, uniform drug distribution, high drug release controllability, high modulus, high mechanical strength, high recovery speed and high recovery stress, and overcomes the defects of the shape memory polymer material with the drug release function, which is prepared by existing swelling methods.

The invention discloses a preparation method of a compound as shown in the formula I. The method comprises the following steps: (1) M-aminobenzoic acid and maleic anhydride are mixed and reacted to obtain the compound as shown in the formula II. (2)The compound of formula II and acetic anhydride are mixed and reacted to obtain the compound as shown in the formula III.(3) The compound of the formula III, N-hydroxysuccinimide and 1-ethyl-3-(3-dimethylaminopropyl)-carbonyl diimine hydrochloride are mixed and reacted to obtain the compound as shown in the formula IV. And (4) the compound of the formula IV and phosphatidyl ethanolamine are reacted in mixed solvents to obtain the compound as shown in the formula I. The mixed solvent consists of chloroform, methanol and water, the volume ratio thereof is 9: 1: 0.1-9: 0.5; wherein, R represents aliphatic hydrocarbon of C11\C13\C15\C17.

The present invention relates to a production method of a biological organic fertilizer having a moss killing effect, wherein an organic molecular material, a microbial agent, an algae killing agent and the like are metered and conveyed to a material bin through a belt, extrusion granulation is performed, and the granulated product is screened to obtain the biological organic fertilizer having the moss killing effect. According to the present invention, the algae killing agent is added so as to prevent the moss breeding in greenhouses and paddy fields and avoid nutrient and illumination competition between the moss and crops, such that the fertilizer utilization rate is improved in the case that the crops enjoy sufficient sunshine, and the fertilizer use cost is reduced.

The invention discloses a magnetic carbon nanotube and a method for extracting lean meat essence from pork. The magnetic carbon nanotube Fe3O4@ Cys @ CNT is prepared by from FeSO4.7H2O, L-cysteine (Cys) and carbon nanotubes (CNT) as raw materials. The magnetic carbon nanotube Fe3O4@ Cys @ CNT is used as an adsorbent to extract the lean meat concentrate (ractopamine and clenbuterol hydrochloride) from the pork. The effective enrichment and separation of the lean meat essence in a pork sample to be tested is realized, and the sensitivity of the existing method for detection of the lean meat essence in the pork can be greatly improved.

The invention discloses a graphite phase carbon nitride photocatalyst for sewage treatment and a preparation method thereof, the raw materials of the catalyst are melamine and hexamethylenetetramine in a mass ratio of 4200: (50-1000), and the preparation method of the catalyst comprises the following steps: carrying out a hydrothermal reaction on melamine and hexamethylenetetramine in a closed environment to obtain a novel precursor; carrying out high-temperature calcination on the modified precursor to obtain modified graphite phase carbon nitride; a photocatalytic degradation activity test result of the photocatalyst shows that the activity is improved by 8.5 times compared with that before modification, the modified graphite-phase carbon nitride introduces defects, the interlayer spacing is increased, the band gap is narrowed, the modified graphite-phase carbon nitride has stronger photocurrent response, and carrier recombination is inhibited.

The invention discloses a method for preparing high-dispersion graphene loaded Zn-base metal-organic framework composite materials. The method includes steps of A, uniformly mixing graphene oxide solution and chitosan solution with each other to obtain brown solution, transferring the solution into water bath at the temperature of 80-95 DEG C, stirring the solution for 4-6 h, centrifuging productsand ultrasonically dispersing the products in N,N-dimethylformamide to obtain high-dispersibility graphene; B, adding 200-500 mg of Zn(NO3)2 6H2O, 200-500 mg of 2-methylimidazole, 1-4 g of PVP (polyvinyl pyrrolidone) and 150-500 ml of methyl alcohol into the high-dispersibility graphene obtained at the step A, carrying out reaction for 10-13 h, and centrifuging, washing and drying reaction precipitates to obtain the high-dispersion graphene loaded Zn-base metal-organic framework composite materials. The graphene oxide solution and the chitosan solution have equal volumes. The method has the advantage that the high-dispersion graphene loaded Zn-MOF (metal-organic framework) composite materials prepared by the aid of the method have potential application values in multiple aspects.

The invention relates to a nanometer fluorination catalyst for preparing R152a and a preparation method of the nanometer fluorination catalyst. Specifically, the invention relates to a nano-catalyst for catalytic preparation of R152a and a preparation method of the nano-catalyst. The precursor of the nanometer fluorination catalyst is prepared from a metal chromium salt, a metal cobalt salt, a metal zinc salt, a metal lanthanum salt, a complexing agent and a surfactant, wherein a molar ratio of the metal chromium salt to the metal cobalt salt to the metal zinc salt to the metal lanthanum saltis 1: (0.10-0.20): (0.05-0.18): (0.20-0.30); and the specific surface area of the nanometer fluorination catalyst is 465-500 m<2>/g, and the pore volume of the nanometer fluorination catalyst is 0.7-0.9 mL/g. The nanometer fluorination catalyst provided by the invention has higher catalytic activity and longer service life.

The present invention relates to a production method of an organic fertilizer having a moss killing effect, wherein a lot of element fertilizers, organic matters, an auxiliary material, an algae killing agent and the like are metered and conveyed to a granulation roller through a belt, granulation is performed, and the granulated product is subjected to drying, cooling, screening and other processes so as to obtain the organic fertilizer having the moss killing effect. According to the present invention, the algae killing agent is added so as to prevent the moss breeding in greenhouses and paddy fields and avoid nutrient and illumination competition between the moss and crops, such that the fertilizer utilization rate is improved in the case that the crops enjoy sufficient sunshine, and the fertilizer use cost is reduced.

The invention discloses a food-grade antioxidant and a preparation method thereof, and relates to the technical field of foods. In the invention, a mixed component of dandelions and purslane is subjected to biological enzyme pretreatment and an ultrasonic-microwave synergistic extraction method, and lotus leaves are subjected to biological enzyme and ultrasonic-microwave synergistic extraction. The antioxidant composed of three both medicinal and edible raw materials has synergistic effect, and can obviously remove DPPH free radicals. Animal experiments prove that the antioxidant can inhibit lipid peroxidation reaction by improving the activity of antioxidant enzyme, further improves the antioxidant effect of organisms, and finally inhibits the damage of free radicals to cells. The antioxidant t has the characteristics of high extraction efficiency, simple preparation method and time saving, and is suitable for wide popularization and application.

The invention relates to a production method of a macroelement water-soluble fertilizer preventing greenhouse moss. A macroelement fertilizer, trace elements, medium elements, algicide and the like are mixed in a closed environment to obtain the macroelement water-soluble fertilizer preventing the greenhouse moss. By adding the algicide, breeding of the moss in a greenhouse can be prevented, the moss is prevented from struggling for nutritional matters with economic crops, so that a maximum utilization rate of the fertilizer on crop absorption can be realized, and the fertilizer application cost is reduced.

The invention relates to a production method of a trace-element water-soluble fertilizer preventing greenhouse moss. Trace elements, algicide and the like are mixed in a closed environment to obtain the trace-element water-soluble fertilizer preventing the greenhouse moss. By adding the algicide, breeding of the moss in a greenhouse can be prevented, the moss is prevented from struggling for nutritional matters with economic crops, so that a maximum utilization rate of fertilizer on crop absorption can be realized, and the fertilizer application cost is reduced.