53results about How to "Simple conditions" patented technology

The invention relates to the field of nano-composite flame retardants, in particular to a preparation method of a nano-composite flame retardant with alkali metal silsesquioxane particles loaded on the surface of a carbon nano tube, which comprises the following steps: adding an organic solvent and the carbon nano tube into a reaction container, performing ultrasonic and mechanical stirring, adding alkali metal silsesquioxane powder into the reaction container, and performing stirring to obtain a nano-composite flame retardant; a grey black mixed solution is obtained; and carrying out suction filtration on the mixed solution, and drying the obtained filter cake to prepare the nano composite flame retardant with alkali metal silsesquioxane particles loaded on the surface of the carbon nano tube. The product prepared by the invention still presents a one-dimensional nanotube shape, the structure thermal stability of the product is good, the surface of the prepared nanotube is rough on the premise of keeping the one-dimensional nanotube microstructure, agglomeration among a plurality of nanotubes is effectively prevented, and the performance of the nanotube is improved. And the flame retardant is a nano composite flame retardant with dual excellent characteristics of the carbon nano tube and the metal silsesquioxane.

The invention provides an immunochromatography kit and an immunochromatography test strip detection method for ricin, and belongs to the technical field of toxin detection. The method comprises the following steps: mixing and incubating an oligonucleotide chain substrate labeled with a fluorophore and biotin, a buffer solution, a BSA solution and a sample to be detected, and adding ammonia water to terminate the reaction to obtain a reaction solution; adding the reaction solution to an immunochromatography test strip, incubating in a dark place, detecting a fluorescence signal value, and determining whether ricin exists according to a difference value between a final sample fluorescence signal value and a final fluorescence signal value of negative control; the sample to be detected is enriched by using antibody-coated magnetic beads; if the fluorescence signal value of the sample is lower than the negative control fluorescence signal value-3 times of the standard deviation, it is judged that ricin exists. No cross reaction exists between the detection method and an abrus precatorius toxin sample, and the detection sensitivity can reach 0.17 ng / mL. When the kit is applied to detection of a milk simulation sample, the sensitivity can reach 1.53 ng / mL.

The invention discloses a gallium nitride substrate polishing solution based on a Fenton-like oxidation technology. The gallium nitride substrate polishing solution comprises the following raw materials in percentage by mass: 10-40% of a polishing abrasive, 5-40% of a nano metal suspension, 0.1-10% of a complexing agent, 0.1-10% of an oxidizing agent and the balance of deionized water. The nano-metal suspension liquid is a nano zero-valent metal suspension liquid or a nano bimetal suspension liquid formed by doping two metals. The particle size range of metal in the nano-metal suspension liquid is 60-100 nm. According to the polishing solution disclosed by the invention, the surface characteristics of the gallium nitride substrate are greatly improved by adding the nano-metal and based on a solid-phase catalysis technology of the nano-metal, so that the surface of the gallium nitride substrate is ultra-smooth and has no defects, no surface / subsurface damage and no surface roughness Rult after the polishing solution is used; therefore, the industrialization requirement of the gallium nitride as a photoelectric device is met, and the application range of the gallium nitride component is expanded.

The invention discloses a diosgenin derivative containing a 1, 2, 3-triazole structure fragment as well as a preparation method and application of the diosgenin derivative, and belongs to the field of natural medicinal chemistry and medicinal chemistry. Based on a molecular heterozygosis principle, diosgenin is used as a lead compound and is heterozygous with a 1, 2, 3-triazole structure fragment with different substituent groups to obtain a derivative shown as a general formula (I) or (I). The diosgenin derivative containing the 1, 2, 3-triazole fragment, disclosed by the invention, has good anti-breast cancer activity. Pharmacological experiment results show that the anti-tumor activity of part of the derivatives on human breast cancer cells is obviously superior to that of diosgenin, and the toxicity on human normal gastric mucosa epithelial cells is relatively small, so that the derivatives are expected to be further developed into anti-tumor drugs. # imgabs0 #

The invention relates to in-situ cross-linked polypeptide gel and a preparation method and application thereof, and the preparation method comprises the following steps: dissolving modified polypeptide in a first solvent to obtain a component A; dissolving an amino high-molecular polymer in a second solvent to obtain a component B; mixing the component A and the component B to obtain in-situ cross-linked polypeptide gel; the modified polypeptide is mainly obtained by reacting a compound containing an NHS group with polypeptide under the action of a catalyst. The preparation method of the in-situ cross-linked polypeptide gel is simple in condition, easy to operate, mild in reaction condition, simple and easily available in raw materials, safe and good in biocompatibility, and has a wide application prospect. The prepared hydrogel containing the polypeptide chain is good in toughness, good in viscosity, good in biocompatibility, high in biological safety, biodegradable, good in plasticity, non-toxic and harmless.

The invention discloses a fingerprint spectrum construction method of a traditional Chinese medicine composition containing angelica sinensis and cinnamon. The construction method comprises the following steps: preparing a test solution; preparing a reference substance solution; and obtaining the fingerprint spectrum of the traditional Chinese medicine composition according to results of high performance liquid detection of the test solution and the reference solution. The chemical components of the traditional Chinese medicine composition containing angelica sinensis and cinnamon are comprehensively and systematically analyzed, and a theoretical basis is provided for deep research on quality control and pharmacodynamic material basis.

The invention discloses a photo-assisted biomass conversion method and application of the photo-assisted biomass conversion method in hydrogen production. Belongs to the technical field of solar photocatalysis. The conversion method comprises the following steps: mixing an aqueous dispersion with illumination; dispersomes of the mixed aqueous dispersion comprise heteropoly acid and biomass. According to the conversion method, protons in the biomass can be combined with heteropolyacid to form heteropolyblue on the premise that external heat energy is not applied and a noble metal catalyst is not added, the method is simple, energy is saved, the cost is low, and a basis can be provided for subsequent hydrogen production. The invention also provides a method for producing hydrogen from biomass, which is implemented by using the preparation method.

The invention discloses a method for preparing a modified polytetrafluoroethylene membrane for adsorbing metal ions, comprising the following steps: weighing a monomer: acrylic acid, a crosslinking agent: di(methacryloyloxyethyl) hydrogen phosphate, thionyl chloride, a photoinitiator and an antioxidant in a certain proportion and completely dissolving them in a solvent for standby use; transferring the polytetrafluoroethylene flat membrane to the above solution system and soaking it for a certain period of time; using a plasma surface treatment machine to treat the soaked polytetrafluoroethylene flat membrane, and then photocuring it by ultraviolet light for a period of time to obtain a modified polytetrafluoroethylene flat membrane. The invention uses a hydrophilic monomer and a hydrophilic crosslinking agent, and in the cooperation of a solvent, obtains a modified polytetrafluoroethylene membrane with good water wetting effect, and after being subjected to external friction, the grafted hydrophilic polymer is not easy to fall off, and is easy to industrialize.

According to the preparation method of the high-spinning monatomic cobalt monolithic catalyst provided by the invention, monatomic sites are constructed on a millimeter-scale porous macroscopic carrier by adopting a green solvent'one-pot method ', so that the advantages of high monatomic reaction activity and high practicability and stability of the macroscopic carrier can be integrated; meanwhile, stable and ordered monatomic sites are formed through induction of a confinement effect generated by a nano pore channel in the carrier, and selective oxidation of non-free radical species dominated by the monatomic sites is enhanced through an adsorption enrichment-confinement catalysis effect to remove water pollutants; the strong carrier-metal interaction is regulated and controlled, so that the monatomic activity and the catalytic stability are improved, and the secondary pollution problem caused by metal dissolution is reduced. The preparation process is simple, convenient, green and economical, the confinement type active metal coordination environment and the non-free radical selective oxidation path are easy to regulate and control, and the application prospect in the aspect of selective oxidation removal of various pollutants under the complex water quality condition is good.

The invention relates to the technical field of automobile control, in particular to a low-temperature air supply system and method for an air suspension. Comprising a pipeline module, a temperature acquisition module and a control module, and the pipeline module comprises a first pipeline and a second pipeline; one end of the first pipeline is communicated with an air conditioner air outlet, and the other end is communicated with an inlet end of an air compressor for supplying air to the air spring; the other end of the second pipeline is communicated with the inlet end of the air compressor; the temperature acquisition module is used for acquiring air temperature in the air spring, external environment temperature and air temperature of an air outlet of the air conditioner; the control module controls the first pipeline or the second pipeline to communicate with the air compressor based on the air spring internal air temperature, the external environment temperature and the air conditioner air outlet air temperature. According to the air spring cooling device, low-temperature gas can be provided for the air spring to cool the air spring, so that the air spring is always in a good temperature environment.

The application provides a modified polyethylene oxide solid electrolyte and a preparation method and application thereof, and the preparation method comprises the following steps: (1) mixing polyethylene oxide, a reducing agent and a solvent to obtain a polyethylene oxide mixed solution; (2) after the polyethylene oxide mixed solution is heated to a reaction temperature, an initiator solution and a negative electrically active monomer are respectively added dropwise into the heated polyethylene oxide mixed solution to obtain the modified polyethylene oxide solid electrolyte. The polyethylene oxide is modified in the application, a branched component is introduced, and the intermolecular hydrogen bond effect is destroyed, so that the crystallinity of the polyethylene oxide can be reduced, and the ionic conductivity of the polyethylene oxide is improved.

The present invention discloses a method for constructing a fingerprint of a Chinese medicine composition containing Atractylodes macrocephala, and the method comprises the following steps: preparing a test solution of the Chinese medicine composition; preparing a reference solution; and obtaining a fingerprint of the Chinese medicine composition according to the results of high performance liquid phase detection of the test solution of the Chinese medicine composition and the reference solution. The present invention comprehensively and systematically analyzes the chemical components of the Chinese medicine composition containing Atractylodes macrocephala, and provides a theoretical basis for in-depth research on quality control and the material basis of drug efficacy.

The invention belongs to the technical field of organic chemistry, and particularly relates to a synthesis method of a chiral sulfonyl substituted vinyl naphthalene axial chiral compound. The method comprises the following steps: in a solvent, under a mild condition, generating a sulfinic acid anion intermediate from a cyclopropanol compound and a sulfur dioxide solid substitute in situ, and then carrying out asymmetric nucleophilic attack on a 1-alkynyl-2-naphthol compound activated by a chiral small organic molecule catalyst, so as to obtain the 1-alkynyl-2-naphthol compound. The chiral sulfonyl substituted vinyl naphthalene axial chiral compound is obtained. The synthesis method has the advantages that the conditions are mild, the method is simple and efficient, the application range of substrates is wide, the high-enantioselectivity sulfonyl substituted vinyl naphthalene axial chiral compound is obtained, the types of sulfonylation reactions are enriched to a certain extent, and the method has good application value.

The invention discloses heat-resistant glucose dehydrogenase and application thereof in an enzyme fuel cell, and belongs to the crossing field of bioelectrochemistry and new energy technologies. According to the invention, firstly, a heat-resistant glucose dehydrogenase TeGDH is screened, and the heat-resistant glucose dehydrogenase TeGDH is subjected to heterologous expression in escherichia coli BL21 (DE3) and shows good heat stability and catalytic activity; teGDH is dissolved in an anolyte containing an electron mediator anthraquinone-2, 6-disulfonic acid disodium salt, and the heat-resistant high-energy enzyme fuel cell is prepared by adopting a non-immobilized system; the maximum power density of the battery at 50 DEG C reaches 1.74 mW / cm, and the battery has good thermal stability and long-term operation performance; the invention combines big data mining, enzyme engineering and electrochemical technologies, provides a novel enzyme fuel cell solution with high activity, high stability and low cost, and has a good application prospect.

The invention provides an environment-friendly, low-cost and recyclable ZIF-67 material and a method for synthesizing the ZIF-67 material on a large scale. The synthesis method comprises the following synthesis steps: adding 2-methylimidazole into tap water, stirring, and adding n-butylamine to adjust the alkalinity of the solution so as to enable the pH gt of the solution; 10.3, 10.3; then adding a fully dissolved cobalt chloride hexahydrate solution into the mixed solution, and continuously stirring; and standing the reaction solution at room temperature, and separating, washing and drying the precipitate in vacuum to obtain the product. And taking the supernatant waste liquid after the reaction for cyclic utilization, and repeating the previous operation to obtain the purple powder ZIF-67 material. The invention aims to solve the problems of low yield, use of a large amount of organic solvent, energy waste, complex operation, harsh conditions, high cost and the like in the existing ZIF-67 synthesis method, and the ZIF-67 material with high crystallinity, complete structure and uniform particle size is prepared from industrial-grade raw materials by taking tap water as a solvent.

The present invention discloses a method for constructing a fingerprint of a Chinese medicine composition containing Belamcanda chinensis and Ephedra sinica, and the method comprises the following steps: preparing a test solution of the Chinese medicine composition; preparing a reference solution; and obtaining a fingerprint of the Chinese medicine composition according to the results of high performance liquid phase detection of the test solution of the Chinese medicine composition and the reference solution. The present invention comprehensively and systematically analyzes the chemical components of the Chinese medicine composition containing Belamcanda chinensis and Ephedra sinica, and provides a theoretical basis for in-depth research on quality control and the material basis of drug efficacy.

The application belongs to the technical field of organic synthesis and particularly relates to a preparation method of riboprine. The method comprises the following steps: starting from a key intermediate (1S, 5R)-1-(3-fluorophenyl)-3-oxabicyclo[3.1.0]hexan-2-one, hydrolysis is performed to form an open ring compound, then a protecting group of a hydroxyl group is introduced under alkaline conditions; then, reduction is performed on a carboxyl group to form a hydroxyl compound, an intermediate compound is generated by introducing a leaving group and then reacting with 2, 4-dimethyl-5-hydroxypyrimidine, the protecting group is removed to expose the hydroxyl group, oxidation is performed to form a carboxyl compound, and finally, acid-amine condensation reaction is performed on 2-amino-5-fluoropyridine to generate riboprine. The preparation method provided by the present application is simple in operation, high in yield and suitable for industrial production of riboprine.

The invention relates to the technical field of fire safety, and particularly discloses a temperature-sensitive coating material for early warning of a fire and a preparation method of the temperature-sensitive coating material. The temperature-sensitive coating material comprises 12-20 parts of a temperature-sensitive material, 80-100 parts of a curing agent, 4-28 parts of a surface-modified heat-conducting filler, 2-14 parts of a modifier and 240-300 parts of an organic prepolymer. The temperature-sensitive coating is applied to the surface of a base body such as a mine conveyor belt, an electronic element and wall cloth which are prone to being heated to cause fire disasters for temperature-sensitive modification, when the temperature of the environment or equipment is increased abnormally, the heat-conducting filler in the temperature-sensitive coating can improve the heat-conducting property of the coating, and meanwhile, a porous structure is formed in the coating, so that the heat-conducting property of the coating is improved. And the temperature-sensitive material in the coating is promoted to be quickly released together, and the detector detects the gas and gives out early warning, so that advanced early warning before a fire disaster occurs is realized, and the fire safety of the material and equipment is guaranteed.

The application provides an extraction method of high-purity type I collagen, and belongs to the technical field of biomedical materials. The application realizes efficient and stable extraction of type I collagen by accurately selecting process conditions, significantly improves the purity and extraction efficiency of the target product, and the obtained collagen has complete three-dimensional structure, extremely low impurity residue and water content, greatly improves the biocompatibility and storage stability of the product, the method is simple in process, easy to control in condition, does not need complex large-scale equipment, is suitable for large-scale production, provides a reliable high-quality raw material source for high-end implant medical devices, and expands the application prospect of collagen in the field of biomedicine.

The invention belongs to the technical field of solar cells, and particularly relates to a wide-band-gap conjugated polymer donor material and a preparation method and application thereof. The average molecular weight of the wide-band-gap conjugated polymer donor material is 20000-100000, and the wide-band-gap conjugated polymer donor material is blended with a narrow-band-gap non-fullerene small molecule receptor to construct an organic solar cell. And the photoelectric conversion efficiency of the organic solar cell can be up to 19.56%. An organic solar cell based on BLZ-19 is one of the highest two components at present. The synthesis method is simple, conditions are easy to realize, and large-scale popularization can be realized.

This invention relates to the field of organic materials technology, specifically to a metal-organic framework (MOF), its preparation method, and its applications. The MOF is a CuBaTi MOF; wherein the MOF has a layered and porous structure; the CuBaTi MOF is modified with a surfactant; and the CuBaTi MOF is composited with mineral components. This MOF can effectively inhibit bacteria and adsorb ethylene. When made into an antibacterial film, it can not only preserve and inhibit bacteria in fruits and vegetables, delaying ripening and spoilage, but also possesses good mechanical properties. Furthermore, the preparation method of this MOF is simple, convenient, low-cost, and environmentally friendly, showing broad application prospects.

This invention discloses a purification method for 2,5-furandicarboxylic acid, comprising the following steps: 1) Pre-treating the crude FDCA to be purified to obtain a pre-treated FDCA salt solution for later use; 2) Adjusting the pH of the pre-treated FDCA salt solution obtained in step 1) with dilute acid until the pH value is 4-5, then adding activated carbon to a beaker for decolorization and impurity removal, and filtering the solution in the beaker after treatment to obtain the FDCA salt solution; 3) Slowly adding strong acid to the FDCA salt solution obtained in step 2) while stirring until the pH value of the solution is <1, then filtering the reacted material to obtain a solid precipitate, washing the solid precipitate with deionized water, and drying it to obtain purified FDCA. The process of this invention is simple, carried out under normal temperature and pressure conditions, has high purification efficiency, and is suitable for large-scale scale-up and production.

The invention discloses a method for preparing ethanol through detoxification-free fermentation of furfural residues and application. The method comprises the following steps: S1, carrying out high-solid-content enzymolysis on acidic furfural residues which are not subjected to any detoxification pretreatment to obtain furfural residue enzymatic hydrolysate; s2, liquefying and saccharifying the waste starch to obtain a starch saccharification liquid; and S3, mixing the furfural residue enzymatic hydrolysate and the starch saccharification liquid in proportion, inoculating zymomonas mobilis, and carrying out co-fermentation to produce ethanol. According to the method, key technologies such as detoxification-free treatment, high-solid-content enzymolysis and co-fermentation with starch saccharification liquid are combined, and the steps of neutralization, water washing and deep detoxification which are necessary in a traditional process are thoroughly abandoned, so that the process is greatly simplified, water resources are saved, the treatment cost is reduced, and the problem of toxicity of inhibitors in raw materials is effectively solved. The method provides an efficient, economical and environment-friendly brand-new way for realizing high-valued resource utilization of the furfural residues and the waste starch.

The invention belongs to the technical field of electrocatalysis, and particularly relates to a preparation method of a nickel-cobalt-molybdenum sulfide bifunctional electrocatalyst and application of the nickel-cobalt-molybdenum sulfide bifunctional electrocatalyst in electrolyzed water. According to the method, a two-step hydrothermal method is adopted, double-layer hydroxide NiCoLDH / NF is firstly prepared, then the double-layer hydroxide NiCoLDH / NF is added into a mixed solution containing sulfur and molybdenum elements, and nickel-cobalt-molybdenum sulfide (Mo-NiCo2S4 / NF) is directly generated on conductive foamed nickel. The prepared electrocatalyst has a nano array structure, shows excellent hydrogen evolution and oxygen evolution catalytic activity and good stability under an alkaline condition, can drive a full water splitting reaction only with a voltage of 1.5 V, and realizes a current density of 10 mA cm <-2 >. The method is simple, convenient and rapid, and provides a new way for efficiently and stably producing hydrogen and oxygen by electrolyzing water.

The invention discloses a method for detecting protein amino acids in microalgae. The method comprises the following steps: dividing a microalgae sample into a first sample and a second sample; carrying out acid hydrolysis treatment on the first sample to obtain an acid hydrolysis sample solution, carrying out deacidification treatment on the acid hydrolysis sample solution, and then carrying out first dilution treatment to obtain a first sample solution to be detected; performing alkaline hydrolysis treatment on the second sample to obtain an alkaline hydrolysis sample solution, adjusting the alkaline hydrolysis sample solution to be neutral, and performing second dilution treatment to obtain a second sample solution to be detected; and performing liquid chromatography-tandem mass spectrometry detection on the first to-be-detected sample solution and the second to-be-detected sample solution. Derivation operation is not needed in sample pretreatment, interference of derivative by-products is avoided, conditions in an instrument method are simple, reagents are low in cost, the operation time is greatly shortened, the difficulty of detection steps is reduced, the consumable and time cost of the whole analysis process is reduced, and the detection efficiency is improved. The protein amino acid in the microalgae can be quickly, simply and conveniently detected and analyzed with high sensitivity.

The invention discloses a Te-doped double perovskite Cs2Zr1-xSnxCl6 solid solution material as well as a preparation method and application thereof, the Te-doped double perovskite Cs2Zr1-xSnxCl6 solid solution material has a chemical general formula of Cs2Zr1-xSnxCl6: yTe < 4 + >, x is greater than 0 and less than 1, y is greater than 0 and less than 0.2, the Te-doped double perovskite Cs2Zr1-xSnxCl6 solid solution material can be prepared through a solvothermal method reaction under a relatively low reaction condition, and the Te-doped double perovskite Cs2Zr1-xSnxCl6 solid solution material can be used for preparing the Te-doped double perovskite solid solution material. The material has relatively high moisture absorption resistance, chemical stability and X-ray induced carrier storage capacity, and the carrier storage temperature covers an ultra-wide temperature range from 100K to 400K.

The present invention relates to a tellurium molybdate birefringent crystal material and its preparation and application. The chemical formula of the material is Mo(H2O)Te2O7, which belongs to the tetragonal system, has a space group of I‑4, unit cell parameters of #imgabs0##imgabs1#α=β=γ=90°, Z=8, and a unit cell volume of #imgabs2##imgabs3#. The birefringence value of the Mo(H2O)Te2O7 crystal of the present invention reaches 0.53 at 546nm, which is significantly greater than the birefringence efficiency of the existing commercial birefringent crystal. Under 1064nm laser irradiation, the frequency doubling effect of the Mo(H2O)Te2O7 crystal powder is 5.4 times that of KH2PO4 (KDP), and phase matching can be achieved. The Mo(H2O)Te2O7 crystal has broad application prospects in the fields of laser frequency conversion, photoelectric modulation, laser signal holographic storage, etc.

The invention discloses a K / FeS / g-C3N4 / TiO2 (at) PVDF membrane for photocatalytic oxidation, a preparation method and application, through SO2 and CO2 generated by pyrolysis of K4 [Fe (CN) 6] and K2SO3, gaps are generated in a microstructure of g-C3N4, the specific surface area is higher, adsorption of organic pollutants is enhanced, the reaction rate is increased, a FeS / g-C3N4 / TiO2 heterojunction structure is constructed, and the photocatalytic oxidation performance of the membrane is improved. And carbon defects or nitrogen defects generated by K ionization are introduced into the structure, so that stable electron channel connection and light energy absorption and conversion paths are realized, the light response efficiency is improved, the recombination rate of photo-generated electron holes is reduced, and the free radical yield is improved. The membrane material is applied to a circulating aquaculture water body treatment system, odor substances are degraded through photocatalytic oxidation, and deep purification of water is achieved.

The invention provides a novel method for activating ferrate through piezoelectric catalysis and application, and belongs to the technical field of ferrate activation. The method comprises the steps that potassium ferrate is dissolved in deionized water; then adding zinc stannate into the potassium ferrate solution; and finally, under an ultrasonic condition, catalyzing and activating the ferrate by utilizing the piezoelectric property of zinc stannate. The ferrate activation method provided by the invention can be used for degrading sulfonamide antibiotics in a water body, the degradation efficiency of the ferrate activation method is remarkably superior to that of single ferrate, the ferrate activation method is high in adaptability, and a stable activation effect can be shown in various anion environments, and more importantly, the novel ferrate activation method can be used for degrading sulfonamide antibiotics in a water body. The problem that the stability and oxidability of ferrate are incompatible is solved, reaction can be carried out under the neutral condition, the stability of the ferrate is guaranteed, meanwhile, the oxidability of the ferrate is achieved, and the ferrate is suitable for being applied and popularized in sewage treatment.