6605 results about "Acetic acid" patented technology

The invention provides an acetylacetone-based composite thermal stabilizer which is a mixture obtained by mixing zinc acetylacetonate, calcium acetylacetonate or magnesium acetylacetonate and hydrotalcite pro rata. The composite thermal stabilizer is suitable for chloride-containing high polymer, such as polyvinyl chloride, chlorinated polyethylene, chlorinated polyvinyl chloride, copolymer of vinyl chloride-ethylene or copolymer of vinyl chloride-vinyl acetate, has better thermal stability, prolongs the thermal aging time of the chloride-containing high polymer, and overcomes the shortcomings of poor long-term performance of single stabilizer of zinc acetylacetonate, poor transparency of stabilizer of calcium acetylacetonate, and poor initial colorability of stabilizer of hydrotalcite. The composite thermal stabilizer has low cost, good initial colorability, excellent long-term performance and good transparency, and is an efficient composite thermal stabilizer.

The present invention provides a compound as shown in formula (I), and a pharmaceutically acceptable salt of the compound. The compound in the present invention exhibits a strong inhibitory effect on Lp(a) assembly, and can be used for treating cardiovascular diseases (CVD).

A forest fire retardant composition contains a retardant compound that includes a potassium salt. The potassium salt may include a potassium salt of an organic acid, a potassium salt of an inorganic acid, or mixtures thereof. The organic acid may include formic acid, acetic acid, propanoic acid, butanoic acid, lactic acid, oxalic acid, malic acid, gluconic acid, tartaric acid, uric acid, malic acid, or citric acid. The inorganic acid may include sulfuric acid, phosphoric acid, carbonic acid, or hydrochloric acid. The composition may be in the form of a dry concentrate, a liquid concentrate, or a final diluted product. The final diluted product is effective in suppressing, retarding, and controlling forest fires while exhibiting corrosion resistance and low toxicity.

The invention discloses a salt and alkali tolerant phosphate-solubilizing growth-promoting bacterium and application thereof, and belongs to the technical field of biology, the salt and alkali tolerant phosphate-solubilizing growth-promoting bacterium is named as Enterobacter hormaechei P03 and preserved in the China Center for Type Culture Collection (CCTCC), and the preservation number is CCTCC No: M 20242250. The enterobacter hormaechei P03 provided by the invention has good salt resistance, acid and alkali resistance, growth promotion and phosphate solubilizing effects, grows well under high salinity, acidic conditions and alkaline conditions, has better phosphate solubilizing capacity, and can generate indoleacetic acid in the growth process to promote plant growth.

Embodiments of the present invention provide methods and intermediates for the large scale preparation of 2, 4, 6-trifluoro-N-[6-(1-methylpiperidine-4-carbonyl)-2-pyridyl] benzamide hemisuccinate, as well as formulations and product forms prepared by these methods. Embodiments of the present invention further provide for the preparation of lamidetan acetate (2, 4, 6-trifluoro-N-[6-(1-methylpiperidine-4-carbonyl)-2-pyridyl] benzamide acetate) and / or a pharmaceutical composition thereof, and / or the use of lamidetan acetate and formulations thereof in subcutaneous drug delivery.

The invention discloses a preparation method of a curing agent with biological self-healing capability, which comprises the following steps: preparing a bacillus pasteurii bacterial solution, preparing the bacillus pasteurii bacterial solution into an endophytic spore solution, immersing polyvinyl alcohol fibers into a sodium alginate / endophytic spore solution, taking out the polyvinyl alcohol fibers, immediately immersing the polyvinyl alcohol fibers into a calcium acetate solution, drying the polyvinyl alcohol fibers to obtain core fibers with a hydrogel coating, and curing the core fibers with the hydrogel coating to obtain the curing agent with biological self-healing capability. The preparation method comprises the following steps: taking magnesium phosphate cement as a raw material, immediately immersing the magnesium phosphate cement into a chloroform solution of a polystyrene and polylactic acid polymer blend, drying to obtain a coated microbial liquid, premixing urea and glucose, doping the premixed urea and glucose into the magnesium phosphate cement, uniformly stirring, adding the coated microbial liquid, and uniformly stirring to obtain the product. According to the invention, phosphate cement is adopted as the curing agent, has the advantages of high strength, short setting time, strong durability, low alkalinity, good biocompatibility and the like, and compared with the curing agent in the prior art, the curing agent not only has a good curing effect, but also has a crack self-healing function, and is especially suitable for reinforcing foundation soil.

The invention belongs to the technical field of oil and gas field development, and particularly relates to a CO2 thickening agent for supercritical CO2 oil displacement and a preparation method of the CO2 thickening agent. The preparation method of the CO2 thickening agent for supercritical CO2 oil displacement comprises the following steps: (1) mixing a maleic anhydride compound and a styrene compound, dissolving in water, introducing inert gas, and heating; (2) slowly dropwise adding a mixed solution of a vinyl acetate compound and an initiator, and cooling after the reaction is finished; and (3) filtering, washing a solid phase by using an anhydrous alcohol substance, drying, and grinding to obtain a thickening agent product. The supercritical CO2 thickened by the thickening agent prepared by the invention can effectively slow down the viscous fingering phenomenon in the displacement process and improve the CO2 sweep efficiency, thereby improving the crude oil recovery rate.

The invention discloses recombinant escherichia coli for producing D-psicose and a preparation method of the recombinant escherichia coli, and belongs to the field of genetic engineering. The technical problem to be solved in the invention is how to supply microorganisms for growth by using glycerol, acetic acid, fatty acid and the like as raw materials and prepare D-psicose by using glucose as a raw material. The invention provides recombinant Escherichia coli, which uses glycerol, acetic acid, fatty acid and the like as carbon sources to amplify (grow) the recombinant Escherichia coli, and uses D-glucose as a substrate to prepare D-psicose. According to the recombinant escherichia coli provided by the invention, glycerol, acetic acid, fatty acid and the like can be used as carbon sources for microbial growth, and D-psicose is synthesized by taking D-glucose as a raw material after the microbial growth reaches a certain biomass. Furthermore, a corresponding technical route for synthesizing the D-psicose is established.

The invention discloses a pillararene-based supramolecular polymer membrane, a preparation method thereof and application of the pillararene-based supramolecular polymer membrane in dye separation. The preparation method utilizes interfacial polymerization, and comprises the following steps: mixing a CH2Cl2 solution containing MeP5Bpy with an aqueous solution containing tetra (4-aminophenyl) methane and acetic acid, and standing to obtain the pillararene-based supramolecular polymer membrane at the interface of CH2Cl2 and the aqueous solution. The dye separation process is simple to operate and low in equipment requirement; rectification operation is not needed in the separation process, energy consumption is low, energy is saved, and the production cost is reduced.

The invention provides a Bi-BDO fermentation pH dissolved oxygen dynamic optimization method based on an online Raman spectrum, belongs to the technical field of biological fermentation process control, and aims to solve the problems of unstable process and low efficiency caused by fermentation control lag and incapability of sensing the real metabolic state of cells in the prior art. The method comprises the following steps: acquiring the concentrations of a target product BDO and key byproducts such as acetic acid and ethanol in the fermentation liquor in real time through an online Raman spectrum; according to the method, a metabolic stress index is originally proposed and constructed, the index is obtained by performing weighted operation on the instantaneous generation rate of the by-product and the target product, and the index is used for quantitatively characterizing the intrinsic metabolic stress level of the cells in real time. The control strategy of maintaining the metabolic stress index in the preset optimal stable interval is taken as a core control strategy, the conversion from passive response to active prediction in the fermentation process is realized, and the yield, the stability and the batch repeatability of Bi-BDO production are remarkably improved.

The invention discloses a method for rapidly preparing a hard carbon negative electrode material from a waste wind turbine blade, an obtained product and application, and the method comprises the following steps: putting the waste wind turbine blade into a mixed solution of acetic acid and hydrogen peroxide, heating for reaction, filtering after the reaction, and distilling filtrate to obtain degraded resin; and carrying out heating curing on the degraded resin to obtain cured resin, carrying out pre-carbonization on the cured resin, and then carrying out Joule heat high-temperature carbonization to obtain the hard carbon negative electrode material. According to the method, fibers and resin in the waste wind turbine blades are separated through one-step reaction by adopting a chemical recovery method, and the hard carbon negative electrode material is prepared by utilizing a Joule heating technology, so that the preparation period of the hard carbon negative electrode material is shortened, the energy consumption is reduced, and the application of the hard carbon negative electrode material in the sodium-ion battery has good application prospects. And the initial coulombic efficiency, platform capacity and total capacity of the prepared sodium ion battery can be simultaneously improved.

The invention relates to a crown ether covalent organic framework material as well as a preparation method and application thereof. The preparation method comprises the following steps: dissolving a crown ether monomer and an amino monomer in an o-dichlorobenzene solvent, adding a catalyst acetic acid aqueous solution, and uniformly dispersing to form a reaction solution; the method comprises the following steps: freezing a reaction solution through a liquid nitrogen bath, vacuumizing, filling nitrogen, carrying out a heating reaction, and carrying out post-treatment operations such as washing and drying on a reaction product, so as to obtain the crown ether covalent organic framework material BADT-DB18C6-COF. The crown ether covalent organic framework material is formed by condensation of a crown ether aldehyde monomer and an amino monomer, the crown ether monomer is 4, 4 ', 4' ', 4 '''-(6, 7, 9, 10, 17, 18, 20, 21-octahydrodibenzo [B, K] [1, 4, 7, 10, 13, 16] hexaoxacyclo octadecene-2, 3, 13, 14-tetrayl) tetrabenzaldehyde, and the crown ether monomer is 4, 4 ', 4' ', 4'''-(6, 7, 9, 10, 17, 18, 20, 21-octahydrodibenzo [B, K] [1, 4, 7, 10, 13, 16] hexaoxacyclo octadecene-2, 3, 13, 14-tetrayl) tetrabenzaldehyde. The amino monomer is 4 ', 5'-bis (4-aminophenyl)-[1, 1 ': 2', 1 ''-terphenyl]-4, 4''-diamine. The crown ether covalent organic framework material BADT-DB18C6-COF prepared by the invention is mainly used as an adsorbent, is used for adsorbing and recovering uranium, thorium and americium ions from a solution, shows good adsorption capacity on radionuclides U-238, Th-232 and Am-243, and is particularly suitable for the field of spent fuel post-treatment in the nuclear industry.

The invention discloses an endogenous tRNA (transfer ribonucleic acid) promoter. The nucleotide sequence of the endogenous tRNA promoter is shown as SEQ ID NO: 1; an expression cassette containing the endogenous tRNA promoter and a recombinant vector; the invention also relates to application of the endogenous tRNA promoter, the expression cassette or the recombinant vector in thraustochytriaceae microorganism gene editing, and a thraustochytriaceae microorganism gene editing method. The CRISPR / Cas9 gene editing system based on the endogenous tRNA promoter is successfully established, convenient, rapid and efficient fixed-point editing in thraustochytriaceae microorganisms is achieved, and the CRISPR / Cas9 gene editing system has high application value; a transformation system for screening the recombinant thraustochytriaceae microorganisms by using sodium acetate as an auxotroph is established, the transformation screening efficiency of the recombinant thraustochytriaceae microorganisms obtained based on an agrobacterium transformation method is remarkably improved, and rapid gene editing is assisted.

The invention belongs to the technical field of perovskite solar cells, and provides synthesis and application of a novel self-assembled monomolecular hole transport material with conjugated extended tail ends. According to the self-assembled monomolecular hole transport material, a carbazole group is used as a terminal core, an aromatic ring is introduced to the terminal of carbazole to extend a conjugated structure, an alkyl chain is used as a connecting unit, phosphoric acid or acetic acid is used as an anchoring group, and the self-assembled monomolecular hole transport material with conjugated extended terminal is formed. And the stability, the hole transport property, the hole extraction capability and the interface passivation capability of the material are improved. Experiments show that the self-assembled monomolecular hole transport material has an HOMO energy level matched with a perovskite layer, and hole transport is facilitated. When the self-assembled monomolecular hole transport material disclosed by the invention is applied to a trans-perovskite solar cell with a band gap of 1.53 eV, the photoelectric conversion efficiency as high as 26.11% is obtained, and excellent device stability is shown.

The invention discloses water-based formaldehyde-free woodworking glue and a preparation method thereof, and relates to the technical field of woodworking glue. When the water-based formaldehyde-free woodworking glue is prepared, firstly, n-butyllithium is used as an initiator to initiate cyclosiloxane and an acrylate monomer to be polymerized, then dimethyl chlorosilane is used for blocking to obtain pre-modified polyacrylate, and the pre-modified polyacrylate is used for preparing the water-based formaldehyde-free woodworking glue. Reacting the pre-modified polyacrylate with vinyl diphenylphosphine, and then reacting with 3-(4-bromophenyl)-1-propylene to obtain modified polyacrylate; secondly, reacting the 4-(trimethoxysilyl) butyraldehyde modified silicon dioxide with chitosan, and then reacting with mercaptoacetic acid to obtain modified silicon dioxide; finally, mixing the modified polyacrylate, the modified silicon dioxide, an emulsifier, a defoaming agent, pure water and a photoinitiator to obtain the water-based formaldehyde-free woodworking glue. The water-based formaldehyde-free woodworking glue prepared by the invention has flame retardance and antibacterial property.

The invention relates to the technical field of photovoltaic module packaging, in particular to a corrosion-resistant EVA (Ethylene Vinyl Acetate) packaging adhesive film which is prepared by the following method: uniformly mixing 100 parts by weight of ethylene-vinyl acetate copolymer, 0.8-2 parts by weight of cross-linking agent, 0.1-0.3 part by weight of antioxidant, 0.1-0.3 part by weight of light stabilizer, 0.3-3 parts by weight of silane coupling agent and 0.4-1 part by weight of acid remover; and extruding in a single-screw extruder at the temperature of 95 DEG C to prepare the EVA packaging adhesive film with the thickness of about 0.5-0.7 mm. According to the invention, the deacidification agent is added, and the deacidification agent comprises magnesium hydroxide master batch and polycarbodiimide master batch; after the acid remover is used, the content of acetic acid after the adhesive film is aged is reduced, and the corrosion resistance of the adhesive film is improved.

The invention provides a preparation method of medicinal liquor and application of the medicinal liquor in preparation of analgesic and anti-inflammatory products, and relates to the technical field of medicines. The preparation method comprises the following steps: (1) crushing; (2) extracting; (3) standing and separating; and (4) freezing and filtering to obtain the medicinal liquor. In the preparation process, traditional Chinese medicine components are extracted through the steps of batch crushing, mixed extraction, standing, freezing and separation of supernate and suspension in different separation modes to obtain the medicinal liquor, and the medicinal liquor can better inhibit pain caused by thermal stimulation and chemical substances and has a better analgesic effect; the traditional Chinese medicine composition can inhibit capillary permeability increase caused by acetic acid, has a better effect of inhibiting inflammation exudation, and has remarkable analgesic and anti-inflammatory effects.

The invention discloses a method for preparing nano barium titanate based on sol-gel synergistic hydrothermal reaction, which comprises the following steps: (1) dissolving barium acetate in an acetic acid aqueous solution to obtain a barium source solution; weighing tetrabutyl titanate according to the molar ratio of barium to titanium being greater than 1.25, and dissolving the tetrabutyl titanate in alcohol to obtain a titanium source solution; (2) uniformly mixing the barium source solution and the titanium source solution, preserving heat at 20-80 DEG C to obtain gel, drying and grinding to obtain white powder of the barium titanate precursor: (3) preparing a 2-4mol / L inorganic strong alkali aqueous solution, adding the white powder and a dispersing agent into the inorganic strong alkali aqueous solution, and fully stirring to obtain a barium titanate precursor suspension; and (4) transferring the barium titanate precursor suspension into a reaction kettle for hydrothermal reaction, and after the reaction is completed, washing, drying and grinding to obtain the nano barium titanate powder. The preparation method is low in cost, and the prepared nano barium titanate powder is uniform in distribution, spherical or sphere-like in morphology, small in particle size, 80-150nm in average particle size and good in particle crystallinity.

The invention discloses a Br-COFs material and a preparation method thereof as well as a preparation method of a covalent organic framework material interface film of a lithium metal battery. The preparation method comprises the following steps: dissolving 1, 3, 5-tri (4-aminophenyl) benzene and 2, 5-dibromobenzene-1, 4-dicarboxaldehyde in an organic solvent, dropwise adding acetic acid into the solution, reacting the reaction mixture under stirring, filtering, washing and drying to obtain the covalent organic framework material; and dissolving the obtained Br-COFs material and a PVdF adhesive in an organic solvent to obtain a mixed solution, coating the surface of a copper foil with the mixed solution according to a certain thickness, and forming the Br-COFs artificial interfacial film on the surface of a copper foil electrode after the solvent is volatilized. The preparation method is simple, the preparation process is green and environment-friendly, and the prepared product is high in purity, controllable in structure and high in mechanical strength, can be directly used as an artificial interface film of a lithium metal battery, and shows excellent stability when being used for a Li / Cu battery.

The invention belongs to the technical field of biomedical materials, and particularly relates to an anti-inflammatory nano drug delivery system containing a guanidyl structure as well as a preparation method and application of the anti-inflammatory nano drug delivery system, the anti-inflammatory nano drug delivery system is B (at) COFDT-R obtained by taking COFDT as a carrier, loading a drug and then wrapping the drug with an erythrocyte membrane, and the COFDT is obtained by taking DG and TP as raw materials in a reaction of mesitylene / 1, 2, 4-trimethylbenzene / 1, 2, 4-trimethylbenzene / 1, 2, 4-trimethylbenzene / 1, 2, 4-trimethylbenzene / 1, 2, 4-trimethylbenzene and carrying out a high-temperature microwave reaction in a 1, 4-dioxane / acetic acid system. The anti-inflammatory nano drug delivery system disclosed by the invention takes a covalent organic framework material as a carrier platform, and integrates the babarid into a COFDT cavity, so that neuronal cells are protected by inhibiting neuroinflammation and pyroptosis of neurons after subarachnoid hemorrhage.

The invention relates to a preparation method and application of a porous material for preparing methanol through carbon dioxide adsorption and conversion. When the material is prepared, firstly, 4, 4 '4' '-(1, 3, 5-triazine-2, 4, 6-trimethylene) triphenylamine and 1, 2-acenaphthequinone are treated in a mixed solvent containing dioxane / acetonitrile / 6M acetic acid, and AT-COF is obtained; further synthesizing by adopting an impregnation method to obtain IrRu-COF; and finally, uniformly mixing the active gamma-aluminum oxide and the IrRu-COF material to form a carrier dispersion liquid, and then carrying out PEI loading, vacuum impregnation, washing and drying to obtain the PEI functionalized gamma-Al2O3 / COF composite catalyst. The technical closed loop from low-concentration CO2 capture to solar driven conversion is realized, the process flow is simple, and the energy consumption is low.

The invention relates to the technical field of microorganisms, in particular to a culture medium and a method for culturing Ackermania muciniphila for activating Amuc-1260 by using lambda-carrageenan as a carbon source, according to the culture method, the lambda-carrageenan is used for replacing a traditional carbon source, thallus growth and proliferation can be remarkably promoted, the effect is optimal under the condition of 2.00 g / L, and the culture cost is low. Compared with the conventional carbon source (glucose), the carbon source is improved by 92.91%. Further research finds that the lambda-carrageenan can induce the Akk bacteria to up-regulate the expression of glycoside hydrolase such as Amuc-1260 and enhance the activity of pathways such as glycosaminoglycan degradation, amino acid metabolism and insulin signals, so that the metabolic adaptability and energy utilization efficiency of the bacteria are improved. Meanwhile, the Akk bacteria secrete more functional short-chain fatty acids such as acetic acid, propionic acid and the like under the condition, and have the effects of regulating intestinal health and maintaining metabolic homeostasis. The invention provides a new theoretical basis and technical support for large-scale culture of Akk bacteria and development of a metabiotic product.

The invention discloses a multi-dimensional rapid evaluation method for snow-melting agent corrosion resistance of stainless steel, and relates to the technical field of stainless steel performance evaluation.The multi-dimensional rapid evaluation method comprises the steps that sodium chloride, calcium chloride and magnesium chloride are weighed by mass and dissolved in deionized water, acetic acid and sodium hydrogen sulfite are added after dissolution, and the pH value is adjusted to 4-6; performing potentiodynamic polarization scanning and electrochemical impedance spectroscopy testing on the stainless steel sample to obtain pitting potential and impedance modulus; the method comprises the following steps: placing a stainless steel sample in a cyclic corrosion experiment box, carrying out a corrosion experiment under the conditions of controlling the cyclic temperature change of an environment temperature and periodically carrying out cyclic switching of a spraying mode, a humid mode and a drying mode, taking out the sample every set time, and measuring the corrosion rate and the maximum pitting depth; and according to the pitting potential, the impedance modulus, the corrosion rate and the maximum pitting depth, carrying out graded judgment on the corrosion resistance of the stainless steel. According to the method, the corrosion resistance of the stainless steel can be accurately evaluated in a short time.

The invention relates to the technical field of purification of organic chemicals, in particular to an aroma purification method of leaf alcohol. Comprising the following steps: preparing a methanesulfonic acid magnetic catalyst; esterification of leaf alcohol; and alcoholysis and fractionation of the esterification solution. According to the method, acetic acid is used for esterification of leaf alcohol, then clear water and a sodium carbonate solution are used for washing, the clear water can effectively remove some water-soluble impurities and acidic byproducts, and the sodium carbonate solution not only can neutralize residual acidic substances, but also can promote siloxane impurities in initial leaf alcohol to be hydrolyzed and then taken away by a water phase, so that the content of the siloxane impurities in the leaf alcohol is reduced; in the subsequent process of producing leaf alcohol through alcoholysis of the organic phase I, pure water and ethanol, silyl ether impurities are hydrolyzed in a high-temperature and strong-alkali environment, products are dissolved in waste liquid to be removed, olefine aldehyde impurities with the boiling point lower than that of leaf alcohol are removed through azeotropic fractionation with ethanol, in conclusion, the impurities in the finished product leaf alcohol can be effectively reduced, and the yield of the finished product leaf alcohol is increased. And the prepared finished product leaf alcohol is high in purity and pure in fragrance.

The invention discloses a method for preparing recombinant collagen antioxidant microspheres without a cross-linking agent. The method comprises the following steps: 1, dissolving recombinant collagen and chitosan in deionized water containing glacial acetic acid to serve as a water phase; petroleum ether containing a surfactant is used as an oil phase; 2, injecting the oil phase into the water phase, emulsifying and stirring through a homogenizer, and reducing the temperature of the system to obtain an emulsion; 3, a fixing agent, water and absolute ethyl alcohol are blended and precooled, and fixing liquid is obtained; 4, adding the stationary liquid into the emulsified liquid for curing, and washing the cured microspheres; and 5, transferring into a tannic acid aqueous solution to soak, then washing with deionized water, and freeze-drying to obtain the recombinant collagen microspheres with uniform size. The recombinant collagen microspheres prepared by the method have good dispersity and uniform and controllable size, avoid the toxicity problem of a cross-linking agent, can be applied to the fields of medical instruments, tissue engineering, drug delivery and the like as a filling agent, and have wide commercial application prospects.

The invention belongs to the technical field of pharmaceutic adjuvants, and particularly relates to a plant polysaccharide extract as well as a preparation method and application thereof. According to the method, pretreatment is carried out through the composite acid liquor composed of acetic acid and oxalic acid, meanwhile, efficient extraction is carried out through the deep-eutectic solvent, and impurity removal treatment is carried out in cooperation with modified activated carbon, so that the plant polysaccharide extract is efficiently obtained, and the extraction rate and purity of the extract are improved.

The invention discloses an acetic acid content determination kit with an oscillation structure, and relates to the technical field of biological detection, the acetic acid content determination kit comprises a kit body and a protective top cover hinged to the rear of the kit body; a cleaning mechanism is arranged on the inner side of the protective top cover, the cleaning mechanism comprises a cleaning brush rod, and the bottom end of the cleaning brush rod slidably penetrates through the left side and the right side of the bottom end of the interior of the protective top cover; wherein an oscillation mechanism is arranged in an oscillation cavity in the kit body, the oscillation mechanism comprises a guide positioning disc, and the guide positioning disc is fixedly mounted at the lower part in the oscillation cavity. According to the acetic acid content determination kit with the oscillation structure, the cleaning mechanism cleans the determination contact pad through overturning of the protective top cover, reagent overflow is prevented while residues are avoided, the reagent tube is driven to rotate by adopting the intermittent fast and slow rotating oscillation mechanism, oscillation is realized by adopting an abutting mode, and the detection accuracy is improved. And the uniformity is prevented from being influenced by a single oscillation mixing mode.

The invention relates to the technical field of hydrogel, in particular to a preparation method and application of EGCG-mediated hydrogel, a lysozyme solution is heated under the acidic condition to form lysozyme amyloid fibrils LAFs, EGCG is dissolved in a buffer solution and mixed with the LAFs solution obtained in the step 1 in proportion to form an LAFs-EGCG compound, and the EGCG-mediated hydrogel is prepared. The chitosan CS is dissolved in an acetic acid buffer solution, glutaraldehyde is added to serve as a cross-linking agent, the mixture is mixed with the LAFs-EGCG compound obtained in the step 2 and stirred, the composite hydrogel is formed, the concentration of EGCG is 0.2-1.0 wt%, the concentration of LAFs is 5 wt%, the concentration of chitosan is 2 wt%, the pH value of the lysozyme solution in the step 1 is 2.0, the heating temperature is 77 DEG C, the heating time is 10 hours, the concentration of EGCG in the step 2 is 0.4-0.8 wt%, and the pH value of the lysozyme solution in the step 2 is 1.5-2.5. In the step 3, the concentration of glutaraldehyde is 2%, the storage modulus G'of the hydrogel is 325-480 Pa, the hardness is 2176.71 g, and the bacteriostasis rate on staphylococcus aureus and salmonella exceeds 95%.

The invention provides a material for removing sodium ions in saline-alkali soil and a preparation method, and relates to the field of sodium ion adsorbents, the preparation method comprises the following steps: (1) lignin modification: under a water bath condition, dissolving sulfate lignin in a mixed solution of analytically pure acetic acid and 30% hydrogen peroxide, then adding ferric chloride, reacting for 1.5-2.5 hours, diluting with distilled water by 7-8 times, centrifuging and washing to obtain modified lignin; drying to obtain oxidized lignin; (2) hydrogel synthesis: mixing and stirring the oxidized lignin and analytically pure acrylic acid, adding a cross-linking agent and an initiator, and reacting in a drying oven at 65-75 DEG C for 1.5-2.5 hours to form a sodium ion adsorption material with a porous interpenetrating network structure; by modifying the lignin, particularly introducing more hydroxyl and carboxyl groups, the performance of the lignin in the application of adsorbing ions, preparing hydrogel and the like can be improved.

The invention relates to the technical field of preparation of metal organic frameworks, and particularly discloses a preparation method and application of a porous MOF (Metal Organic Frame.The method comprises the following steps: dissolving a triblock copolymer PluronicF-127 in ultrapure water, adding acetic acid and sodium chloride, and uniformly stirring to form a solution; adding zirconyl nitrate into the solution, and adjusting temperature and reaction time through a metal ion diffusion optimization model to ensure uniform distribution of metal ions; organic ligands are introduced to adjust the pore size distribution of the MOF; carrying out surface functionalization on the synthesized MOF material, and introducing amino and carboxyl; washing and filtering the synthesized MOF material to remove impurities and residues, and then drying the MOF material under a vacuum condition to remove moisture and an organic solvent. According to the invention, the performance of the MOF material in the application of the electrochemical luminescence sensor is effectively improved.