1053 results about "Potassium carbonate" patented technology

The invention belongs to the technical field of polyester recycling, and relates to a method for efficiently producing terephthalate by depolymerizing waste polyester through carbonic ester, which comprises the following steps: depolymerizing waste polyester, carbonic ester and a catalyst under the protection of nitrogen or inert gas and solvent-free conditions, a is more than one of zinc acetate, sodium acetate, potassium chloride, lithium chloride, potassium carbonate, sodium carbonate, ethylene glycol antimony, antimony trioxide, antimony acetate, ethylene glycol titanium and titanium dioxide, and B is sodium ethoxide. The method solves the problems of limited conversion of the waste polyester chemical recovery monomer and long production process in the prior art, obviously improves the catalytic efficiency and the depolymerization speed through the compound catalyst, simplifies the depolymerization process, reduces the energy consumption, and is beneficial to industrial application.

The invention discloses a crystalline polyaryletherketone surface grafted carbon fiber and a preparation method thereof, and belongs to the technical field of carbon materials.The preparation method comprises the following steps that an amino end-capping reagent containing sulfuryl, a difluoro monomer, a bisphenol monomer and potassium carbonate are placed in sulfolane to be subjected to a polymerization reaction, and amino-terminated polyarylether is obtained; carrying out diazonium salt reaction on the amino-terminated polyarylether and nitrite tetrafluoroborate to obtain diazonium salt-terminated polyarylether; connecting the carbon fiber with a cathode, immersing the carbon fiber in an electrolyte containing diazonium salt terminated polyarylether, and applying a reduction potential for reaction to obtain polyarylether grafted carbon fiber; and carrying out hydrolysis reaction on the carbon fiber grafted with polyarylether in an acid environment to obtain the crystalline polyaryletherketone surface grafted carbon fiber. According to the crystalline polyaryletherketone surface grafting modified carbon fiber prepared by the invention, the carbon fiber is directly connected with a polymer through high-temperature-resistant and corrosion-resistant phenyl and sulfuryl, so that the crystalline polyaryletherketone surface grafting modified carbon fiber has better high-temperature resistance and corrosion resistance.

The invention relates to a preparation method of an amino-functionalized metal organic framework material and application of the prepared material to separation of CO2 / N2 and CO2 / CH4. The preparation method comprises the following steps: dissolving adenine and copper nitrate trihydrate in N, N '-dimethylacetamide to obtain a first mixed solution; dissolving carboxylic acid and potassium carbonate in deionized water to obtain a second mixed solution; and adding the second mixed solution into the first mixed solution, carrying out stirring reaction, and carrying out vacuum drying on an obtained solid product to obtain the amino-functionalized metal organic framework material. The amino-functionalized metal organic framework material prepared by the invention has high CO2 adsorption selectivity and adsorption capacity, and also has good acid-resistant, alkali-resistant and water-resistant stability. The amino-functionalized metal organic framework material prepared by the preparation method disclosed by the invention is applied to industrial CO2 adsorption separation and has an excellent separation effect.

The invention discloses a fluoride salt-free nitrate-free cast iron enamel semitransparent glaze as well as a preparation method and application thereof, and belongs to the technical field of enamel. The semitransparent glaze is prepared from quartz, anhydrous borax, sodium carbonate, potassium carbonate, calcium carbonate, potassium feldspar, zinc oxide, lithium carbonate, zirconium silicate, titanium dioxide, aluminum oxide, trisodium phosphate, antimony oxide, magnesium carbonate and barium carbonate according to a specific mass ratio. The preparation method comprises the steps of raw material mixing, high-temperature melting under a pure oxygen condition, wiredrawing detection, quenching and the like. The semitransparent glaze is completely free of fluoride salt and nitrate, the problems of fluoride emission and environmental protection equipment blockage are avoided from the source, the fluorine content of the product is not detected through detection, the product meets the requirements of European Union REACH regulations, meanwhile, the product has good porcelain surface, luster and low-temperature firing adaptability, and is suitable for cast iron matrixes, the firing temperature is 740-760 DEG C, and the firing time is 2-3 hours. The method can be used for producing green and environment-friendly enamel products.

The invention discloses polyether-ether-ketone resin with adjustable molecular weight distribution as well as a synthesis method and application of the polyether-ether-ketone resin. The synthesis method comprises the following steps: preparing polyether-ether-ketone resin in the presence of carbonate and / or bicarbonate of alkali metal; wherein the carbonate and / or bicarbonate of the alkali metal comprises sodium carbonate and potassium carbonate, and the sodium carbonate has gradient particle size distribution. According to the invention, sodium carbonate with specific particle size distribution is used to regulate and control the reaction rate to be stable and continuous, so that the molecular weight distribution of the polymer presents a narrower distribution form. Therefore, the molecular structure is uniform, the molecular form is uniform, the physical and chemical properties, including mechanical strength, thermal stability and chemical stability, of the material can be improved, and particularly, the thermal stability of the material is improved most remarkably.

The invention discloses a wear-resistant and mildew-proof ceramic tile which comprises a green body and a glaze layer attached to the green body, and the wear-resistant and mildew-proof ceramic tile is obtained by coating the surface of the green body with a modified interface agent and then glazing, wherein the glaze layer is prepared from the following raw materials in parts by weight: 40 to 50 parts of silicon dioxide, 30 to 35 parts of aluminum oxide, 15 to 20 parts of modified titanium dioxide, 6 to 10 parts of barium carbonate, 6 to 10 parts of mullite, 5 to 8 parts of silver-loaded zirconium phosphate, 4 to 8 parts of potassium carbonate, 4 to 8 parts of sodium carbonate, 3 to 7 parts of limestone, 3 to 5 parts of sodium borate, 2 to 4 parts of zinc oxide and 0.5 to 1 part of sodium tripolyphosphate. According to the ceramic tile, the modified interface agent with specific composition is introduced between the ceramic tile green body and the glaze layer, modified titanium dioxide and inorganic components (such as aluminum phosphate, aluminum acetylacetonate and tetrapropyl zirconate) in the interface agent form oxides in the sintering process, and the interface bonding strength is remarkably enhanced through physical occlusion; and the long-term wear resistance and mildew resistance of the ceramic tile glaze layer are improved.

The invention relates to the technical field, in particular to an ultralight foamed ceramic hollow sphere prepared from iron lepidolite tailings and a preparation method and application of the ultralight foamed ceramic hollow sphere. The foamed ceramic hollow sphere is prepared from the following raw materials: iron lepidolite tailings, silicon carbide, bentonite, sodium carbonate and potassium carbonate; in percentage by mass, the content of the iron lepidolite tailings is 90 to 96.4 percent; the content of the silicon carbide is 0.1-1%; the iron lepidolite tailings are prepared from the following components in percentage by mass: 77 to 80 percent of SiO2, 10 to 13 percent of Al2O3, 1.3 to 1.6 percent of Fe2O3 and 0.1 to 0.17 percent of Li2O. The ultralight foamed ceramic hollow sphere is prepared by using the iron lepidolite tailings, the silicon carbide, the bentonite, the sodium carbonate and the potassium carbonate as raw materials, can meet various market requirements of heat preservation, heat insulation, sound insulation, noise reduction and the like, and brings remarkable economic benefits and social benefits.

The invention relates to the technical field of piezoelectric light-transmitting functional ceramics, and discloses a high-light-transmitting ceramic material and a preparation method thereof.The preparation method comprises the following preparation steps that sodium carbonate, potassium carbonate, niobium pentoxide, antimony trioxide, samarium oxide and zirconium dioxide powder raw materials are taken, and after primary ball milling and drying are conducted on the powder raw materials, mixed powder is obtained; carrying out pre-sintering and secondary ball milling on the mixed powder, carrying out compression molding to form a tablet, and sintering and polishing the tablet to obtain a ceramic matrix; and spraying the composite slurry to the surface of a ceramic matrix, carrying out heat treatment, and cooling to room temperature to obtain the high-transmittance ceramic material. The antimony trioxide, the samarium oxide and the zirconium dioxide are co-doped, an antimony-samarium-zirconium liquid phase is generated in the ceramic material, pores of the ceramic material are filled and eliminated, and the prepared ceramic material has excellent optical transmittance, piezoelectric property and mechanical strength.

The invention discloses a crown ether functionalized covalent organic framework material as well as a preparation method and application thereof, and the method comprises the following steps: adding a covalent organic framework material, 4-bromobenzo-15-crown-5, potassium carbonate and potassium iodide into an acetone solution for reaction, washing the obtained crude product, performing Soxhlet extraction with tetrahydrofuran for a certain time, and drying to obtain the crown ether functionalized covalent organic framework material. The crown ether functionalized covalent organic framework material is obtained. Compared with a synthesis method of crown ether functionalized COFs in the prior art, the method has the advantages that the crown ether (4-bromobenzo-15-crown-5) can be grafted to the COFs in one step, the Na < + > adsorption capacity and the adsorbent recycling performance are greatly improved, the synthesis method is simple, and synthesis of the crown ether functionalized COFs is greener, more convenient and more economical.

The invention discloses fluoride-salt-free and nitrate-free high-temperature acid-resistant translucent glaze for steel plate enamel as well as a preparation method and application of the translucent glaze, and belongs to the technical field of enamel. The semitransparent glaze is prepared from quartz, anhydrous borax, titanium dioxide, trisodium phosphate, potassium carbonate, lithium carbonate, aluminum oxide, zinc oxide and sodium carbonate according to a specific mass ratio. The preparation method comprises the steps of raw material mixing, high-temperature melting under a pure oxygen condition, wiredrawing detection, quenching and the like. The semitransparent glaze is completely free of fluoride salt and nitrate, the problems of fluoride emission and environmental protection equipment blockage are avoided from the source, the fluorine content of the product is not detected through detection, the product meets the requirements of European Union REACH regulations, meanwhile, the product has good porcelain surface, luster and firing adaptability, is suitable for a steel plate matrix, has the firing temperature of 840-880 DEG C and the firing time of 820-830 minutes, and is suitable for a steel plate. The method can be used for producing green and environment-friendly enamel products.

The invention discloses green and environment-friendly sea sand mortar as well as a preparation method and application thereof, and belongs to the technical field of building materials. The sea sand mortar comprises sea sand, a composite alkali activator, a cementing material and water, the composite alkali activator comprises potassium carbonate and sodium silicate; the cementing material comprises slag powder and fly ash. The preparation method of the sea sand mortar comprises the following steps: S1, pretreating sea sand; s2, mixing and stirring the slag powder, the fly ash and the sea sand in proportion; s3, adding the composite alkali activator, and stirring twice to obtain the sea sand mortar. The sea sand mortar provided by the invention has good compressive strength and breaking strength and short setting time, so that the mortar is suitable for construction application of rapid repair, and also has the characteristics of low carbon and environmental protection.

The invention discloses a sliding plate brick and a preparation method thereof, and relates to the technical field of sliding plate bricks. The sliding plate brick comprises the following raw materials in parts by weight: 30-50 parts of tabular corundum, 20-30 parts of white corundum, 8-12 parts of graphite, 2-5 parts of carbon black, 3-5 parts of metal aluminum powder, 4-6 parts of a binder and 2-4 parts of silicon carbide. The preparation method comprises the following steps: reacting hydroxyl in sodium alginate with chlorine atoms in 4-chlorophenylboronic acid under the action of potassium carbonate to generate boric acid modified sodium alginate; boric acid bonds in the boric acid modified sodium alginate react with hydroxyl groups in tannic acid to generate tannic acid composite sodium alginate; hydroxyl in the tannic acid composite sodium alginate reacts with silicon hydroxyl in the triphenyl hydroxysilane under the action of phosphoric acid to generate the binder. The prepared sliding plate brick has good compression strength and high-temperature fracture resistance.

The invention discloses a fluoride-salt-free and nitrate-free cast iron enamel zirconium white glaze as well as a preparation method and application thereof, and belongs to the technical field of enamel. The zirconium white glaze is prepared from quartz, borax pentahydrate, magnesium carbonate, potassium carbonate, potassium feldspar, zinc oxide, aluminum hydroxide, calcium carbonate, zirconium silicate, sodium tripolyphosphate and lithium carbonate according to a specific mass ratio. The preparation method comprises the steps of raw material mixing, high-temperature melting under a pure oxygen condition, wiredrawing detection, quenching and the like. The zirconium white glaze is completely free of fluoride salt and nitrate, the problems of fluoride emission and environmental protection equipment blockage are avoided from the source, the fluorine content of the product is not detected through detection, the product meets the requirements of European Union REACH regulations, and meanwhile, the zirconium white glaze has good porcelain surface, luster and firing adaptability, is suitable for cast iron matrixes, has the firing temperature of 740-760 DEG C and the firing time of 87-87 hours, and can be widely applied to cast iron substrates. The method can be used for producing green and environment-friendly enamel products.

The invention discloses a catalyst and method for preparing 3-methyl-2-aminobenzoic acid through continuous catalytic hydrogenation, and the method comprises the following steps: pretreating an activated carbon carrier by using pretreatment reagents such as nitric acid and hydrogen peroxide to remove impurities in the carrier; modifying the carrier by using an auxiliary component 1 such as sodium carbonate, stannic chloride, potassium carbonate and lanthanum nitrate, and then roasting and reaming; and finally, active components such as platinum chloride and palladium chloride are mixed and impregnated with an auxiliary component 2 such as oxalic acid, polyethylene glycol-400, sodium metavanadate and polyvinylpyrrolidone, the auxiliary component 2 promotes dispersion of the active metal, and the auxiliary component 2 and the auxiliary component 1 have a synergistic effect, so that the active metal is loaded more uniformly and firmly, and the obtained catalyst has higher activity and selectivity and longer service life. The catalyst is applied to preparation of 3-methyl-2-aminobenzoic acid through catalytic hydrogenation in a fixed bed reactor, the reaction can be continuously and automatically controlled, the three wastes in the reaction process are few, the yield of a target product is high, the service life of the catalyst is long, and the catalyst is suitable for industrial production.

The invention belongs to the technical field of coal combustion, and particularly relates to an environment-friendly rare earth catalyst as well as a preparation method and application thereof in promoting coal combustion. The catalyst is prepared from composite rare earth oxide, calcium oxide, potassium carbonate, ferrous sulfate, kaolin, diatomite and a multi-component composite assistant component in a specific proportion through the steps of slurry ultrasonic activation, rare earth coating, assistant step-by-step doping, microwave drying, protective atmosphere roasting and the like. The catalyst is unique in structure and good in dispersity, the coal combustion efficiency can be remarkably improved, the burnout temperature and the carbon content of fly ash are reduced, emission of flue gas pollutants such as CO, NOx and SO2 is effectively reduced, and the catalyst is suitable for the fields of energy conservation, carbon reduction and environment-friendly treatment of coal-fired power plants and industrial boilers.

The invention discloses nano-engineered microalgae for photoimmunotherapy of melanoma and a preparation method of the nano-engineered microalgae. The preparation method comprises the following steps: S1, respectively putting tannic acid, potassium carbonate, sodium citrate and HAuCl4. 3H2O into water to prepare a tannic acid solution with the concentration of 4.3 mg / mL, a potassium carbonate solution with the concentration of 20.7 mg / mL, a sodium citrate reduction solution with the concentration of 0.7 mg / mL and a HAuCl4 solution with the concentration of 10.0 mg / mL; s2, dissolving a tannic acid solution and a potassium carbonate solution in the sodium citrate reduction solution to obtain a mixed solution; s3, the mixed solution is heated under stirring, a HAuCl4 solution is dropwise added, stirring continues, and AuNP is obtained; and S4, mixing the AuNP obtained in the step S3 with the microalgae PCC 7942, standing, incubating, and centrifugally washing, so as to obtain the nano-engineered microalgae PCC-coated AuNP. The functionalized microalgae drug delivery system (PCC-coated AuNP) prepared by the invention has the performance of respectively generating O2 and H2 through photosynthesis and photocatalytic reaction under the irradiation of 635 nm red light.

The invention belongs to the technical field of ceramic tiles, and discloses a light-sensitive ceramic tile with a combined dry particle and dazzling diamond effect and a preparation method of the light-sensitive ceramic tile. The combined dry granules comprise ceramic dry granules and zircon sand dry granules in a mass ratio of (5-9): (1-5), the ceramic dry granules comprise the following raw materials in parts by weight: 2-7 parts of albite, 1-4 parts of dolomite, 15-21 parts of calcite, 9-13 parts of potassium carbonate, 5-10 parts of aluminum oxide, 45-55 parts of quartz powder, 0.5-1.5 parts of barium carbonate and 6-10 parts of zinc oxide. The light-sensitive ceramic tile with the dazzling diamond effect can be obtained by applying the combined dry particles to a glue dry particle layer. The combined dry particles adopted by the invention can enable the ceramic tile to generate a dazzling three-dimensional flash form, and the pattern is more three-dimensional and natural; and the ceramic tile is smooth in glaze surface and good in antifouling effect.

The invention relates to a preparation method of potassium-nitrogen co-doped cyanobacteria-based activated carbon, and relates to the field of biomass activated carbon. According to the application, the blue-green algae is taken as a substrate, is carbonized firstly, and then is co-doped and activated by adopting melamine and potassium carbonate, the process operation is simple and easy to control, the utilization rate is high, the cost is low, the economic benefit is high, and the method has great significance on recycling of the blue-green algae; besides, according to the technical scheme, under the condition of controlling the mass ratio of the carbon powder to the potassium carbonate and controlling the mass ratio of the carbon powder to the melamine, the quantity of micropores of the prepared activated carbon can be reduced and the quantity of mesopores can be increased by increasing the addition amount of the melamine; the pore size distribution of the prepared activated carbon is changed from micropores to mesopores, so that the purpose of adjusting the pore size is achieved, and the prepared activated carbon is larger in specific surface area and more excellent in adsorption performance.

The invention discloses fluoride-salt-free and nitrate-free low-temperature pearlescent glaze for steel plate enamel as well as a preparation method and application of the pearlescent glaze, and belongs to the technical field of enamel. The pearlescent glaze is prepared from quartz, anhydrous borax, titanium dioxide, magnesium carbonate, sodium tripolyphosphate, potassium carbonate, lithium carbonate, potassium feldspar, zinc oxide and V-26 according to a specific mass ratio. The preparation method comprises the steps of raw material mixing, high-temperature melting under a pure oxygen condition, wiredrawing detection, quenching and the like. The pearlescent glaze is completely free of fluoride salt and nitrate, the problems of fluoride emission and environmental protection equipment blockage are avoided from the source, the fluorine content of the product is not detected through detection, the product meets the requirements of European Union REACH regulations, meanwhile, the pearlescent glaze has good porcelain surface, luster and low-temperature firing adaptability, is suitable for a steel plate matrix, has the firing temperature of 760-800 DEG C and the firing time of 10-20 minutes, and is suitable for a steel plate. The method can be used for producing green and environment-friendly enamel products.

The invention discloses fluoride-salt-free and nitrate-free low-temperature acid-resistant translucent glaze for steel plate enamel as well as a preparation method and application of the translucent glaze, and belongs to the technical field of enamel. The semitransparent glaze is prepared from quartz, anhydrous borax, titanium dioxide, trisodium phosphate, potassium carbonate, lithium carbonate, aluminum oxide, zinc oxide and sodium carbonate according to a specific mass ratio. The preparation method comprises the steps of raw material mixing, high-temperature melting under a pure oxygen condition, wiredrawing detection, quenching and the like. The semitransparent glaze is completely free of fluoride salt and nitrate, the problems of fluoride emission and environmental protection equipment blockage are avoided from the source, the fluorine content of the product is not detected through detection, the product meets the requirements of European Union REACH regulations, meanwhile, the product has good porcelain surface, luster and low-temperature firing adaptability, and is suitable for steel plate substrates, the firing temperature is 760-800 DEG C, and the firing time is 2-3 hours. The method can be used for producing green and environment-friendly enamel products.

The invention discloses a method for efficiently extracting lignocellulose by using a novel ternary eutectic solvent, belongs to the technical field of biomass material extraction, and aims to optimize the reaction activity and the dissolution characteristic of a system by using the unique combination of glycerol (Gly), potassium carbonate (KCO) and polyethylene glycol (PEG-200), effectively overcome the inherent intractability of wheat straw and improve the yield of lignocellulose. The method has the advantages that the method is simple and easy to implement, deconstruction and separation of the wood fiber biomass are promoted, and the obtained cellulose-rich residues have ideal crystallinity, thermal stability and processing capacity, so that the method has efficient downstream processing and application potential, and meanwhile, a more environment-friendly and more sustainable wood fiber biomass treatment method is provided.

The invention discloses a method for yeast-assisted synthesis of porous carbon / vanadium sulfide nano-enzyme and application of the porous carbon / vanadium sulfide nano-enzyme in serum creatinine detection, and belongs to the technical field of serum creatinine detection. Comprising the following steps: (1) mixing saccharomycetes, vanadium chloride and ethanol, performing ultrasonic dispersion, and stirring until liquid is completely volatilized to obtain a first solid A; (2) mixing and grinding the first solid substance A, potassium carbonate and potassium chloride to obtain a second solid substance B; (3) respectively placing the second solid substance B and thioacetamide in grooves at the left end and the right end of a Joule thermal device graphite sample table, and carrying out rapid Joule thermal shock to obtain a third solid substance C; and (4) washing and drying the third solid C to obtain the porous carbon / vanadium sulfide nano-enzyme. A colorimetric sensing method is constructed based on the nano-enzyme prepared by the invention, is used for creatinine detection, and has extremely low detection limit, LOD is as low as 0.07 M / mL, and high specificity and sensitivity are embodied.

The invention relates to the technical field of coatings, in particular to a low-temperature curing type fluorocarbon coating for an aluminum alloy and a preparation method of the low-temperature curing type fluorocarbon coating. The preparation method comprises the following steps: adding eugenol, potassium carbonate and decafluorobiphenyl to obtain modified biphenyl; and adding m-chloroperoxybenzoic acid to prepare the reinforcing agent. And performing surface modification on the linear silicon dioxide filler, the flaky silicon dioxide filler and the dendritic silicon dioxide filler by using gamma-epoxypropoxy propyl trimethoxy silane to obtain the epoxy modified wear-resistant filler. The preparation method comprises the following steps: adding epoxy resin and the epoxy modified wear-resistant filler into xylene, ultrasonically stirring, adding fluorocarbon resin, a reinforcing agent and a curing agent, and continuously ultrasonically stirring to obtain the fluorocarbon coating. The fluorocarbon coating prepared by the invention has good adhesion performance, wear resistance and mechanical strength, so that the fluorocarbon coating has a wide application prospect in the technical field of coatings.

The invention relates to the field of immersed coolants, and discloses a low-density high-thermal-conductivity composite silicone oil coolant and a preparation method thereof, the method comprises preparation of naphthyl-terminated aryl silicone oil and application of the naphthyl-terminated aryl silicone oil to a base liquid of the silicone oil coolant, and the thermal conductivity of the silicone oil coolant is improved. Dissolving dimethyldichlorosilane in tetrahydrofuran, dropwise adding a naphthalene Grignard reagent into the mixed solution, and after the reaction is finished, carrying out quenching, extraction and other processes to obtain dimethylnaphthalene aryl chlorosilane; adding a potassium carbonate solution into the dimethyl naphthyl aryl chlorosilane, and extracting after reaction to obtain dimethyl-naphthyl siloxane alcohol; adding a tin catalyst into the dimethyl-naphthyl siloxane alcohol, carrying out vacuum reaction, rectifying and purifying to obtain tetramethyl dinaphthyl disiloxane; the naphthyl-terminated aryl silicone oil is prepared by taking DMC as a raw material, KOH potassium as a catalyst and tetramethyl dinaphthyl disiloxane as an end capping agent. The composite silicone oil cooling liquid with low density, high specific heat capacity and stable structure is prepared by stirring, mixing and compounding.

The invention discloses a novel fluorescent probe based on triphenylamine and a preparation method and application thereof, the preparation method comprises the following steps: S1, dissolving 4-methoxyaniline and 1-bromo-4-iodobenzene in a solvent A, and then adding copper iodide, 1, 10-phenanthroline and potassium tert-butoxide for reaction to obtain a compound 1; s2, dissolving the compound 1 obtained in the step S1, (5-formylthiophene-2-yl) boric acid and anhydrous potassium carbonate in a solvent B, and then adding PdCl2 (dppf) for reaction to obtain a compound 2; and S3, dissolving the compound 2 obtained in S2 and malononitrile in a solvent C, and then adding triethylamine for reaction to obtain the TPA-CN probe. The TPA-CN probe is used for monitoring exogenous and endogenous SO2 and viscosity change in living cells. According to the invention, dual imaging of SO2 and viscosity in a biological system and a food sample can be realized.

The invention relates to the technical field of heat storage materials, in particular to a simulation method for strengthening the heat storage performance of molten salt by using nano-particle oxygen vacancy defects. The method comprises the following steps: constructing a unit cell structure of silicon dioxide, determining a nanoparticle model containing a surface oxygen vacancy defect based on the unit cell structure of silicon dioxide, and constructing a final silicon dioxide-potassium carbonate nanofluid model based on the nanoparticle model containing the surface oxygen vacancy defect; performing molecular dynamics simulation based on the final silicon dioxide-potassium carbonate nanofluid model to obtain molecular dynamics simulation data; based on molecular dynamics simulation data, the final heat storage performance parameters of the silicon dioxide-potassium carbonate nanofluid model are determined, and by means of the setting mode, results obtained through simulation discover that the heat storage performance of the molten salt can be effectively improved through nano-particle oxygen vacancy defects.

The invention discloses a lignin-based hydrogel water-retaining agent as well as a preparation method and application thereof, and belongs to the technical field of soil water retention improvement. The preparation method provided by the invention comprises the following steps: dissolving lignin under an alkaline condition to form a uniform solution; adding a polymerization reaction monomer into the uniform solution, stirring and mixing, sequentially adding an initiator, an accelerant, a cross-linking agent and a regulator, and stirring and reacting to obtain a reaction solution; the regulator is selected from one or more of clay, zeolite, ammonium bicarbonate, potassium carbonate or calcium superphosphate; injecting the obtained reaction liquid into a mold, and performing ultrasonic treatment to form hydrogel; the hydrogel is cleaned and aged, and the hydrogel is obtained. The preparation method is simple, environmentally friendly, low in energy consumption, short in process, wide in raw material source, low in cost and suitable for industrial production, and the obtained lignin-based hydrogel water-retaining agent is free of toxicity and pollution and has excellent water absorption performance and biodegradability.

The invention relates to a pyrrolopyrrole organic micromolecular photothermal material with high photothermal conversion efficiency and a preparation method and application thereof, and belongs to the field of organic micromolecular photothermal materials. The problems that an existing photo-thermal material is poor in thermal stability and low in photo-thermal conversion efficiency are solved. The preparation method comprises the following steps: mixing BrDPPBr, R-boric acid ester, potassium carbonate and a high-boiling-point solvent, heating, adding a phosphine compound, continuously heating and stirring, reacting, cooling to room temperature, adding pure water to separate out a solid, recrystallizing and purifying to obtain the pyrrolopyrrole organic small molecule photo-thermal material. The evaporator is applied to water evaporation. The invention relates to the pyrrolopyrrole organic small molecule photo-thermal material with high photo-thermal conversion efficiency and the preparation and application of the pyrrolopyrrole organic small molecule photo-thermal material.

The invention relates to a specific PET molecular probe of a targeted KRASG12D mutant as well as a preparation method and application of the specific PET molecular probe. Pyridopyrimidine compounds and R5 are subjected to cooling reaction under the action of N, N-diisopropylethylamine to generate a compound 2; the compound 2 and (2-fluorotetrahydro-1H-pyrrolizine-7A (5H)-yl) methanol are subjected to a heating reaction under the action of N, N-diisopropylethylamine, and a compound 3 is generated; carrying out heating reaction on the compound 3 and biphenyl boronic acid pinacol ester under the action of N, N-diisopropylethylamine and tetrakis (triphenylphosphine) palladium to generate a compound 4; carrying out heating reaction on the compound 4 and 1, 2-bis (tolyloxy) alkane under the action of potassium carbonate to generate a compound 5; the compound 5, radioisotope < 18 > F and an anion complexing agent are subjected to a heating reaction under the action of potassium carbonate to generate the trisubstituted pyridopyrimidine < 18 > F labeled PET molecular probe. Compared with the prior art, the kit has a positioning diagnosis effect on KRASG12D mutant tumors, and image typing of mutant and non-mutant tumors and pathological evaluation after tumor treatment are realized at the same time.

The invention belongs to the technical field of organic fertilizer production, and discloses a method for preparing a high-fulvic-acid type organic fertilizer through minute-level decomposition of chicken manure and application of the high-fulvic-acid type organic fertilizer. The preparation method comprises the steps that urea peroxide, potassium percarbonate, potassium hydroxide and ferrous sulfate are added into pretreated chicken manure, the mixture is stirred and fully mixed at the temperature of 20-30 DEG C and then stands, decomposition is conducted, and the high-fulvic-acid type organic fertilizer is obtained. The decomposition time does not exceed 30 min, and the content of fulvic acid in the high fulvic acid type organic fertilizer is 10-15 wt%; the application comprises the following steps: fully mixing the high fulvic acid type organic fertilizer with the attapulgite and the xanthan gum, granulating by a drum method, and then uniformly applying the mixture to the surface of soil according to 67-100kg / mu. According to the invention, the combination of urea peroxide, potassium percarbonate, potassium hydroxide and ferrous sulfate is utilized to quickly compose the chicken manure, the fulvic acid content and humification degree of the composted chicken manure are high, effective humification of the chicken manure within a short time is realized, the fertilizer efficiency is improved, and the method has important application prospects.