615results about How to "Good storage stability" patented technology

The invention relates to a stem cell bioactive nano-vesicle with efficient inflammation regulation and tissue repair effects, the average particle size of the nano-vesicle is 100-350nm, the polydispersity index (PDI) is 0.05-0.40, and the expression rate of phosphatidylserine (PS) on the surface of the nano-vesicle is greater than 40%. According to the preparation method, stem cells are subjected to apoptosis induction, and then a programmed serial extrusion process is adopted to prepare the nano-vesicles. The nano vesicles are moderate in particle size, uniform in distribution and high in production efficiency, the preparation process is easy to operate, the quality is stable and controllable, and the nano vesicles have excellent technical effects in the aspects of repair and regeneration of inflammation injury type tissues and organs.

The invention relates to the technical field of polyurethane adhesives, in particular to a quick-curing two-component hot-pressing adhesive as well as a preparation method and application thereof. Comprising a component A and a component B. The component A comprises, by weight, 20 to 60 parts of castor oil polyol, 40 to 80 parts of a filling material, 0.001 to 0.01 part of a catalyst and 0.001 to 0.006 part of an auxiliary agent, and the catalyst comprises a triethylene diamine-terminated heat-sensitive catalyst; and the component B comprises an isocyanate curing agent. The filler comprises heavy calcium carbonate and calcium oxide, and the weight ratio of the heavy calcium carbonate to the calcium oxide is (25-40): 1, so that not only can the cost be effectively reduced, but also the tensile-shear strength of the hot-pressing adhesive can be improved; and when the particle size of the filler is adjusted to be 500-2000 meshes, the tensile-shear strength after cementing can be effectively maintained within a relatively low curing time (3-5 minutes), and meanwhile, the storage stability of the sizing material is improved.

The invention provides a fluorine-containing aromatic acid ligand modified zirconium metal oxide nano-cluster photoresist material as well as a preparation method and application thereof. The preparation method of the fluorine-containing aromatic acid ligand modified zirconium metal oxide nano-cluster photoresist material comprises the following steps: mixing a Zr6O4 (OH) 4 (MAA) 12 solution and a fluorine-containing aromatic acid ligand compound solution, and carrying out reaction, rotary evaporation and drying to obtain the fluorine-containing aromatic acid ligand modified zirconium metal oxide nano-cluster photoresist material. The preparation method is simple, cheap and easily available in raw materials, low in cost and suitable for industrial production. The fluorine-containing aromatic acid ligand modified zirconium metal oxide nano-cluster photoresist material can be suitable for ultraviolet lithography, electron beam lithography and extreme ultraviolet lithography, and the formed photoetched pattern has the advantages of low line edge roughness, high resolution and the like, and has wide application prospects.

The present invention provides an FDY oil agent that can be directly oiled with crude oil and a preparation method thereof, the preparation method comprising: putting a sizing agent, an antistatic agent, an emulsifier, a phase change wear-resistant agent and a smoothing agent into a reactor; heating the reactor to 40°C to 60°C, turning on the stirring device of the reactor, and continuously stirring for 20min to 40min under heat preservation conditions to obtain the FDY oil agent; wherein the phase change wear-resistant agent is prepared by the following steps: using a raw material including paraffin to prepare an oil phase; using a raw material including ethyl orthosilicate to prepare an aqueous phase; using a raw material including polyol and isophorone diisocyanate, through an oil-in-water emulsification system, to prepare an emulsion; mixing the emulsion, the oil phase and the aqueous phase to prepare the phase change wear-resistant agent. The FDY oil agent of the present invention has good high temperature resistance and wear resistance.

Provided is a pigment dispersion composition for a black matrix, the pigment dispersion composition having excellent storage stability and being capable of suppressing a decrease in the OD value (optical concentration) during a stand-by time between application of a resist to a substrate and pre-baking, and the resulting resist film having excellent thin wire adhesion. The pigment dispersion composition for a black matrix comprises lactam black, silica-based particles, a pigment dispersant containing a basic group, and an alkali-soluble resin, and satisfies at least one of the following conditions A and B. (Condition A) No carbon black is included. (Condition B) Carbon black is included, and the average primary particle diameter of the carbon black is 30 nm or more.

The invention relates to the technical field of road materials, in particular to an asphalt raw material for SBS polymer modified asphalt and modified asphalt. The asphalt raw material for the SBS polymer modified asphalt comprises the following components in percentage by mass: 9-16% of saturate; 43%-53% of aromatic component; 22%-28% of colloid; 9%-12% of asphaltene; the penetration of the asphalt raw material for the SBS polymer modified asphalt at 25 DEG C is 63-750.1 mm; the dynamic viscosity at 60 DEG C is less than or equal to 240 Pa.s; the penetration ratio is greater than or equal to 65%; the instability index of the colloid is 0.2-0.4; the weight-average molecular weight of the asphalt raw material for the SBS polymer modified asphalt is 1400 to 2200 g / mol. By optimizing the raw material components of the asphalt, the produced modified asphalt has better high-temperature performance, low-temperature performance, anti-aging performance and storage stability, the production efficiency is improved, and the cost is reduced.

The invention discloses a manufacturing method of a new energy power battery cooling liquid capable of improving storage stability, and belongs to the technical field of battery anti-freezing solutions, and the new energy power battery cooling liquid comprises the following auxiliary agent components and components: a) ethylene glycol which is used as a basic solvent and accounts for 40-50% of the total mass; b) deionized water accounting for 50%-60% of the total mass; c) an organic corrosion inhibitor which is selected from benzotriazole, mercaptobenzothiazole or a mixture of benzotriazole and mercaptobenzothiazole and accounts for 0.3-0.5% of the total mass; d) an antioxidant which is selected from di-tert-butyl-p-cresol, triphenyl phosphite or a mixture thereof and accounts for 0.1-0.2% of the total mass; the anti-foaming agent is selected from polydimethylsiloxane, silicone oil or a mixture of the polydimethylsiloxane and the silicone oil and accounts for 0.01%-0.05% of the total mass; and f) a pH regulator which is selected from sodium hydroxide, potassium hydroxide or a mixture thereof, is used for regulating the pH value of the cooling liquid to a suitable range of 7-9, and accounts for 0.05-0.15% of the total mass. The cooling liquid disclosed by the invention can keep the stability of key indexes such as conductivity, pH value, corrosion inhibition performance and oxidation resistance in a long-term storage process, so that the storage stability of the cooling liquid is remarkably improved.

The invention discloses a bio-based waterborne polyurethane coating and a preparation method thereof, and belongs to the technical field of coatings. The bio-based waterborne polyurethane coating prepared by the invention is prepared from the following raw material components in parts by weight: 70 to 80 parts by mass of bio-based polyurethane dispersion liquid, 40 to 60 parts by mass of polysiloxane dispersion liquid, 2 to 5 parts by mass of a cosolvent, 0.1 to 0.5 part by mass of a defoaming agent, 0.5 to 1 part by mass of a photoinitiator and 0.1 to 3 parts by mass of an antioxidant, wherein the bio-based polyurethane dispersion liquid is obtained by dispersing bio-based polyurethane in deionized water, and the bio-based polyurethane is obtained by reacting a polyisocyanate monomer, a catalyst, castor oil and a chain extender; the polysiloxane dispersion liquid is obtained by performing polycondensation on siloxane monomers and then dispersing the siloxane monomers in deionized water.

The invention provides a film-coated copper sheet for interconnection of copper electrodes on the front side of a chip and a preparation method and application of the film-coated copper sheet. The preparation method comprises the following steps: S1, carrying out surface treatment and single-side metallization treatment on a bare copper sheet to obtain a copper sheet with a single-side metallization layer; s2, the single-face metallization layer of the copper sheet is coated with metal soldering paste, drying is conducted in an inert or reducing atmosphere, and the copper sheet with a pre-sintered metal film is obtained; s3, cleaning, drying and activating the copper sheet to obtain an activated copper sheet; and S4, coating the activated copper sheet with a coating solution, and curing after coating to obtain the film-coated copper sheet for interconnection of the copper electrodes on the front surface of the chip. According to the preparation method, the dried metal soldering paste can be protected, sufficient adhesive force can be provided for the film-coated copper sheet and the chip in the sintering process, dispensing fixation is avoided, the packaging cost is reduced, and the service reliability of a packaged device is improved.

The invention provides a cross-linking and curing environment-friendly polyurethane waterproof coating and a preparation method thereof, and the cross-linking and curing environment-friendly polyurethane waterproof coating comprises the following raw materials by weight: 15-30 parts of a polyhydroxy compound; 6 to 15 parts of pentaerythritol polyether; 1-5 parts of an anionic surfactant; 1 to 5 parts of nano silicon dioxide aerogel; 1-8 parts of wollastonite powder; 25 to 45 parts of fly ash floating beads; 10 to 25 parts of diisocyanate; 0.5 to 3 parts of chlorinated paraffin; and 0.5 to 3 parts of N, N-dimethyl-2-hydroxyethylamine. The cross-linking curing environment-friendly polyurethane waterproof coating provided by the invention solves the environment-friendly problem of the traditional polyurethane waterproof coating, realizes solvent-free curing, meets the environment-friendly requirement, improves the comprehensive properties such as elasticity and durability of a coating film, and provides a safer and more effective solution for waterproof construction.

The invention discloses a method for improving color and stability of anthocyanin through combination with punicalagin. The method comprises the step that punicalagin and anthocyanin are subjected to an intermolecular co-pigmentation reaction. According to the invention, punicalagin is adopted as a co-pigment molecule and is subjected to a co-pigmentation reaction with anthocyanin to form a punicalagin and anthocyanin compound, so that the color attribute of the anthocyanin is remarkably enhanced, and an anthocyanin solution presents brighter red color; the punicalagin and anthocyanin compound is prepared from punicalagin and anthocyanin, the heat stability, the light stability, the pH stability and the storage stability of anthocyanin are improved, the heat stability, the light stability and the storage stability of anthocyanin are further improved when the punicalagin and anthocyanin compound is prepared into microcapsules, and the punicalagin and anthocyanin compound has the advantages of being simple in process and low in cost. According to the invention, the utilization value of the anthocyanin is obviously improved, and a new thought is provided for the application of the anthocyanin in the food industry.

The invention discloses an antiviral water-based paint for an interior wall and a preparation method thereof, and belongs to the technical field of water-based paints. The antiviral water paint is used for solving the technical problem that in the prior art, the antiviral performance, the antibacterial performance and the moisture resistance of an antiviral coating need to be further improved. Comprising the following components in parts by weight: 90 to 105 parts of antibacterial and antiviral emulsion, 1.0 to 1.3 parts of dispersing agent, 0.5 to 0.8 part of wetting agent, 0.6 to 1.0 part of defoaming agent, 1.2 to 1.5 parts of thickening agent and 20 to 25 parts of activated filler. The antibacterial agent, modified zinc oxide and the acrylic monomer are prepared into the antibacterial and antiviral emulsion in a free radical polymerization mode in the polysiloxane silicon emulsion containing the multi-element olefin, and the antibacterial and antiviral emulsion is matched with the activated filler, so that the storage stability of the water-based paint is effectively improved, and the service life of the water-based paint is prolonged. And the moisture resistance, scrubbing resistance, long-acting antibacterial property and antiviral property of a water-based paint film are also improved.

The invention discloses a chitosan-casein peptide nano-particle and a preparation method and application thereof, and belongs to the technical field of food manufacturing, chitosan and casein peptide are combined into a nano-composite with the particle size of 10-1000 nm through electrostatic interaction in a non-covalent binding mode, and the nano-composite is used for preparing the chitosan-casein peptide nano-particle. A more stable oil-in-water emulsion can be prepared by utilizing the nano composite; the invention also provides a preparation method and application of the chitosan-casein peptide nanocomposite, and a preparation method of the oil-in-water emulsion. The nano-composite prepared by the invention has relatively strong oxidation resistance, foamability and foaming stability when the ratio of chitosan to casein peptide is 1: 1, and an oil-in-water emulsion prepared from the nano-composite has good storage stability, pH stability and ion stability. The preparation method of the nanocomposite is simple and low in cost, and has a good application prospect.

The invention provides a fat-reducing and weight-reducing food composition, a tablet candy as well as a preparation method and application of the tablet candy, and belongs to the technical field of foods. The fat-reducing and weight-reducing food composition provided by the invention is prepared from the following raw materials in parts by weight: 4 to 8 parts of epigallocatechin gallate, 8 to 16 parts of raw coffee powder, 2 to 6 parts of ginseng peptide powder, 22 to 38 parts of fish oil microcapsule powder, 39.5 to 44.5 parts of a sweetening agent, 3 to 7 parts of a filling agent and 0.5 to 1.5 parts of a lubricating agent. Wherein the sweetening agent is sorbitol, the filling agent is microcrystalline cellulose, and the lubricating agent is magnesium stearate. The food composition can be used for preparing tabletted candies which are good in fat-reducing and weight-reducing effects, good in stability and low in friability.

The invention relates to the technical field of emulsion in water, in particular to a saflufenacil-containing emulsion in water and a preparation method thereof. The saflufenacil suspending agent is prepared from the following raw materials in percentage by mass: 5-30% of saflufenacil, 10-40% of a solvent, 3-5% of an emulsifier, 3-5% of an anti-freezing agent, 0.01-0.1% of a defoaming agent, 0.1-1% of a stabilizer and the balance of water. The water emulsion containing the saflufenacil provided by the invention has good high-temperature storage stability, the decomposition rate of the saflufenacil is less than 5%, and the shelf life of 2 years is met; the dispersing and diluting properties in water with different hardness are good; the anti-flying agent is simply mixed with other dosage form products for use before flying prevention, the barrel mixing compatibility is good, and the abnormal problems of flocculation, layering and the like are not prone to occurring.

The invention relates to the technical field of coatings, and discloses a preparation process of a waterproof coating for roads and bridges, which comprises the following steps: reacting polyester polyol, an isocyanate monomer, 4-N, N-bis (2-hydroxyethyl) aminopyridine-2-formic acid and the like, and then adding water, nano cellulose, copper salt, a neutralizer, pigment and the like to obtain the waterproof coating for roads and bridges. According to the invention, copper ions are respectively coordinated with pyridine-2-formic acid of polyurethane and hydroxyl of nano-cellulose to play a role of a cross-linking agent, and the polyurethane and the nano-cellulose are subjected to ionic cross-linking, so that the interface bonding performance of the polyurethane and the nano-cellulose is improved, and the nano-cellulose has a better reinforcing effect; a paint film of the paint has higher pencil hardness, impact resistance and mechanical properties. Meanwhile, the waterproof and anti-corrosion performance is good, and good practical application is achieved in the fields of roads, bridges and the like.

The invention discloses a Baoyuan decoction for relieving fatigue and regulating immunity and a preparation method thereof, and relates to the technical field of traditional Chinese medicine. The preparation method comprises: crushing ginseng, astragalus, licorice and cinnamon to obtain raw material A; mixing raw material A with extraction solvent 1, adding mixed enzyme, extracting, filtering to obtain extract 1 and filter residue 1; mixing filter residue 1 with water to obtain filter residue liquid, stirring and passing ozone treatment, filtering, washing, drying, and obtaining raw material B; mixing raw material B with extraction solvent 2, extracting, and combining extracts to obtain extract 2; mixing extract 1 and extract 2 uniformly, centrifuging, taking supernatant, adding water, and obtaining the Baoyuan decoction for relieving fatigue and regulating immunity. The present invention optimizes the extraction process, improves the efficacy, obtains better anti-fatigue effect and immunity improvement effect, and reduces the dosage of medication and improves patient compliance.

The invention belongs to the technical field of bacteriostatic agents, and particularly relates to lemongrass essential oil microcapsules, a preparation method thereof, a bacteriostatic agent and application. The preparation method comprises the following steps: by taking lemongrass essential oil as a core material and Arabic gum and beta-cyclodextrin as wall materials, mixing the lemongrass essential oil, the Arabic gum and the beta-cyclodextrin, and preparing the lemongrass essential oil micro-capsule by adopting a spray drying method; the mass ratio of the Arabic gum to the beta-cyclodextrin is (0.5-2): 1, and the mass ratio of the total amount of the Arabic gum and the beta-cyclodextrin to the lemongrass essential oil is (4-6): 1. And then mixing the lemongrass essential oil microcapsules with starch and ethanol, granulating and drying to obtain the antibacterial patch. The lemongrass essential oil microcapsule disclosed by the invention is stable in quality, the action time of the lemongrass essential oil is prolonged, the purpose of long-acting bacteriostasis is achieved, and the technical defect of short action time of a lemongrass essential oil antibacterial agent in the prior art is overcome.

The invention discloses a colloidal emulsion explosive with high storage stability and a preparation method thereof. The raw materials for preparing the emulsion explosive comprise ammonium nitrate, calcium nitrate, water, a compound emulsifier, compound wax and a special foaming agent. Wherein the composite emulsifier is a modified span-80 composite emulsifier obtained by carrying out esterification reaction on an anionic carboxylate emulsifier and multiple hydroxyl sites of span-80, and the composite emulsifier has high molecular weight, so that the space volume of a lipophilic group is increased, and an interfacial film is tighter; the special foaming agent is composed of sodium nitrite, zinc nitrate, gelatin peptone, Tween 80, phosphoric acid, urea and water, the gelatin peptone is a green pure natural raw material, the surface tension of an emulsion matrix is effectively reduced, the contact area of the foaming agent and the emulsion matrix is increased, the foaming efficiency is catalyzed by zinc nitrate, and bubbles are good in stability and not prone to escaping due to Tween 80. The use of the compound emulsifier and the special foaming agent improves the blasting performance and storage stability of the emulsion explosive.

The invention relates to the technical field of cosmetics, and particularly discloses a preparation method of hydrophilic modified zinc oxide. The preparation method of the hydrophilic modified zinc oxide comprises the following steps: dissolving 0.1-5 parts by weight of a modifier in a solvent, uniformly mixing the solution containing the modifier with 20 parts by weight of zinc oxide powder, and drying at 100-150 DEG C to obtain hydrophilic zinc oxide; the modifier comprises polyglycerol. According to the preparation method of the hydrophilic modified zinc oxide, the problem of poor hydrophilicity of zinc oxide is solved, and the preparation method has the advantages of excellent hydrophilicity, simplicity, short time consumption and low cost.

The invention discloses a preservation reagent, a preservation method and a detection method for fat-soluble vitamins D2, D3, A and E in peripheral blood. The preservation reagent comprises the following components: 1-15% of a PBS (Phosphate Buffer Solution) (v / v), 80-95% of a sodium chloride solution (v / v), 0.5-2.5% of Tris-HCl (v / v) and 0.5-2.5% of a stabilizer (w / v). According to the preservation reagent and the preservation method, fat-soluble vitamins D2, D3, A and E in the human whole blood sample can be stably preserved for 28 days at the temperature of 2-8 DEG C under the dark condition, preservation and transportation of the human whole blood sample are facilitated, and detection of the fat-soluble vitamins is facilitated. The precision and accuracy of detection can be improved, and interference of triglyceride, bilirubin and the like on detection of fat-soluble vitamins can be avoided.

The invention belongs to the technical field of cosmetics, and particularly relates to a cosmetic delivery system based on a natural wall material, a preparation method and application. The cosmetic delivery system is of a core-shell structure, a core is a cosmetic active component, and a shell layer is a composite polymer gel network of sodium alginate, sophorolipid and cellulose. The natural polysaccharide composite wall material is green and safe, has good biocompatibility and strong compatibility with cosmetic formulas, and does not irritate the skin. The delivery system can effectively protect cosmetic active ingredients from being damaged by illumination and oxygen, and the storage stability of the active ingredients is remarkably improved; meanwhile, slow release and targeted transdermal absorption of active ingredients are realized, and the bioavailability is improved.

The invention discloses a preparation method of a double-emulsion microcapsule for improving the light stability of vitamin B12 in soft sweets. By constructing a double emulsion system, seepage of the vitamin B12 is effectively prevented, meanwhile, solid fat in an oil phase can effectively block damage of external ultraviolet rays to the vitamin B12, and the storage stability of the vitamin B12 is remarkably improved. In addition, the microcapsule is easy to disperse in water due to the selected water-soluble outer-layer wall material, so that the preparation of the soft sweets is facilitated. And the preparation process is simple and easy for large-scale production. The encapsulation efficiency of the vitamin B12 microcapsule prepared by the method is more than 65%. And the retention rate of the vitamin B12 can reach more than 60% after the vitamin B12 is stored for 28 days under a room-temperature illumination condition, which is obviously superior to the retention rate of the raw materials.

The present application relates to the field of pesticides, and specifically discloses a pesticide composition containing fluazifop-butyl and glufosinate-ammonium, and a preparation method and application thereof. The pesticide composition comprises the following raw materials: fluazifop-butyl, glufosinate-ammonium, a dispersant, an emulsifier, an anti-settling agent and vegetable oil; wherein the emulsifier is a mixture of sodium salt of sulfonated styrene-maleic anhydride copolymer and hydroxylated lecithin; and the preparation method comprises the following steps: mixing and stirring the vegetable oil, the emulsifier and the anti-settling agent to obtain an oil phase, then adding fluazifop-butyl and glufosinate-ammonium, mixing and stirring, adding the dispersant, and then performing homogenization and grinding to obtain a dispersible oil suspension type pesticide composition; the present application also discloses the use of the above pesticide composition for weeding. The present application has the characteristics of a pesticide reagent containing fluazifop-butyl and glufosinate-ammonium at the same time, which can be directly diluted with water when used without the need for fresh preparation, while ensuring its efficacy and being simpler and more convenient to operate.

The invention provides a water-based environmentally friendly anti-corrosion coating, comprising the following raw materials in parts by weight: 50-60 parts of water-based composite emulsion, 4-10 parts of ketimine; 4-6 parts of polyaniline intercalated graphene, 16-18 parts of composite nanoparticles loaded with corrosion inhibitors and 5-10 parts of auxiliary agents; the water-based composite emulsion consists of sodium alginate / acrylic acid / acrylamide copolymer emulsion and water-based epoxy resin emulsion; the auxiliary agent comprises hydroxyethyl cellulose and expanded vermiculite powder; the composite nanoparticles are porous silica / titanium dioxide composite nanoparticles; the corrosion inhibitor consists of histidine, anthocyanin and caffeic acid; the invention uses the water-based composite emulsion as a matrix, adds polyaniline intercalated graphene, composite nanoparticles loaded with corrosion inhibitors and auxiliary agents thereto; and uses ketimine as a curing agent to prepare an environmentally friendly water-based environmentally friendly anti-corrosion coating with long-term anti-corrosion performance.

The invention relates to a fabric flame retardant and a preparation method thereof. The fabric flame retardant is obtained by polymerizing a monomer composition, and the total weight of the monomer composition is 100%. Comprising the following components in percentage by weight: 15 to 30 percent of alkenyl amino triazine comonomer, 5 to 20 percent of polyalkenyl siloxane comonomer, 5 to 15 percent of alkenyl sulfonyl propylidene diacetamide comonomer, 2 to 10 percent of allyl polyoxyethylene ether comonomer and 40 to 65 percent of deionized water. The flame-retardant effect of the fabric finished by the flame retardant can reach B1 level, the fabric is soft and smooth in hand feeling, the fabric surface is not separated out and is not sticky in the storage process, and the color yield is uniform. And the flame retardant is phosphorus-free, halogen-free, formaldehyde-free, safe and environment-friendly.

The invention discloses a modification method of nano silicon dioxide and modified asphalt, and belongs to the technical field of asphalt modifiers or silicon compounds. Nano-particles are easy to settle in the modified asphalt due to different densities when the nano-materials are used for modifying the asphalt, so that the storage stability of the modified asphalt is poor, and after the nano-particles settle, the nano-particles are mutually gathered, so that the viscosity of the nano-modified asphalt is greatly increased, and the asphalt is fractured. The preparation method comprises the following steps: 1) stirring and mixing nano silicon dioxide and a thickening agent dispersion liquid, separating, washing and drying to obtain nano silicon dioxide coated with a thickening agent; wherein the thickening agent is a polyethylene glycol aqueous solution; and 2) adding the nano-silica coated with the thickening agent into the naphthenate solution, and carrying out constant temperature reaction, separation, washing and drying to obtain the modified nano-silica, the solvent in the naphthenate solution being a benzene solvent, so that the intersolubility of the nano-silica and asphalt is improved, network winding is formed, and the settling resistance of nano-silica particles is increased.

The invention relates to the technical field of biological catalysis, in particular to an immobilized formate dehydrogenase mutant and application of the immobilized formate dehydrogenase mutant in electroenzymatic catalysis of CO2. The formate dehydrogenase mutant comprises the following mutations on the basis of clostridium wild formate dehydrogenase: methionine at the 269th site is mutated into isoleucine, serine at the 285th site is mutated into alanine, and serine at the 637th site is mutated into alanine; the NCBI (National Center of Biotechnology Information) accession number of the wild formate dehydrogenase of the clostridium is WP082085143.1. The immobilized formate dehydrogenase mutant provided by the invention has better catalytic activity, temperature, pH stability and storage stability, and can be repeatedly utilized. The immobilized formate dehydrogenase mutant or an electrode material prepared from the immobilized formate dehydrogenase mutant can efficiently catalyze CO2 to be converted into formic acid or formate, which has important significance in the field of renewable energy utilization.

The invention discloses stable high-viscosity modified asphalt and a preparation method thereof. The preparation method comprises the following steps: (1) a component A: adding rare earth nitrate, phthalic acid and triethylene diamine into a mixture of waste oil and N, N-dimethylformamide according to a specific proportion, and reacting to obtain the component A containing a metal organic framework structure; preparing pretreated rubber powder: adding rare earth sulfide and raw rubber powder into waste grease, uniformly stirring, and placing in a drying oven for 6 hours to obtain the pretreated rubber powder; (2) adding the pretreated rubber powder and the modifier into the preheated matrix asphalt, performing high-speed shearing, adding the coupling agent, and performing stirring reaction; and (3) adding the component A, nano particles and phosphite ester into the modified asphalt obtained in the step (2), and slowly stirring and reacting to obtain the stable high-viscosity modified asphalt. The prepared high-viscosity modified asphalt not only has excellent viscosity and toughness and durability, but also is good in high-temperature stability and convenient to store and transport.

The invention relates to the technical field of road materials, in particular to a preparation method of high-elasticity rubber powder composite modified cold-mixed asphalt. The preparation method comprises the following steps: mixing matrix asphalt, high-elasticity rubber powder, an SBS (Styrene Butadiene Styrene) modifier, a cross-linking agent, an activating agent and polyurethane microcapsules; wherein the polyurethane microcapsule takes polyurethane as a shell layer and an asphalt regenerant as a core material, and when the shell layer is prepared, chitosan, sodium lignin sulfonate, acrylamide, trifluoroethyl acrylate and acrylic acid react to obtain composite powder; the prepared cold-mixed asphalt mixture can be mixed and paved at normal temperature / low temperature, and after paving, the high-elasticity rubber powder and the matrix asphalt are fully swelled to form a modified asphalt cementing material, so that the high-temperature stability of the cold-mixed asphalt mixture is enhanced, and the strength of a cold-mixed asphalt pavement is improved. In addition, the cold-mix asphalt waterproof coating has good self-healing performance at the room temperature, and the requirement for timely traffic of a cold-mix asphalt road is met.