915 results about "Sodium bicarbonate" patented technology

The invention relates to a manufacturing method for delicious pork slices. To overcome the influence of too much intake of pork products on a human body, the manufacturing method for the delicious pork slices is provided. The manufacturing method comprises the steps of cutting the pork into the pork slices with the thickness of 2-4 mm; immersing the pork slices in an immersion liquid for 10-30 minutes; heating the immersion liquid with the pork slices and cooking for 0.5-1 h; fishing the pork slices out; draining the liquid; packaging and sterilizing. The manufacturing method is characterized in that, based on 100 parts by weight of the pork slices, the immersion liquid comprises, by weight, 1-5 parts of red yeast, 1-10 parts of rice wine, 20-30 parts of soy sauce, 1-5 parts of dried ginger, 10-20 parts of white sugar, 1-5 parts of spices, 1-5 parts of sodium bicarbonate, 15-30 parts of seaweed and 50-60 parts of water. The pork slices processed by the method can effectively prevent damp and hot proliferation in a stomach after being taken, and gives health to a human body while guaranteeing nutrition of the human body.

The invention provides a sound-insulation porous ceramic tile and a preparation method thereof, and belongs to the field of building materials. The sound-insulation porous ceramic tile is prepared from the following raw materials: 20 to 30 parts of kaolin, 18 to 22 parts of quartz sand, 12 to 18 parts of potassium feldspar, 3 to 7 parts of talcum powder, 3 to 7 parts of silicon carbide powder, 2 to 4 parts of ferrosilicon alloy powder, 0.5 to 1.5 parts of sodium bicarbonate, 3 to 5 parts of hollow glass beads, 1 to 3 parts of zirconium oxide microspheres, 1 to 3 parts of silicon dioxide aerogel particles, 3 to 5 parts of acrylate emulsion, 1 to 3 parts of butadiene styrene rubber emulsion, 0.5 to 1.5 parts of polyvinyl alcohol solution and 1 to 2 parts of polyurethane dispersion. The composite material comprises the following components in parts by weight: 30-60 parts of polypropylene, 0.3-0.7 part of a dispersing agent, 0.2-0.4 part of a defoaming agent, 0.8-1.6 parts of reinforced fibers and 9-13 parts of deionized water. The raw materials of the porous ceramic tile are reasonably designed, the sound insulation performance of the porous ceramic tile is improved, and full-band efficient sound insulation is achieved.

The invention relates to the technical field of fluorite ore beneficiation, discloses a fluorite ore flotation composite collecting agent and a preparation method and application thereof, and aims to solve the problems that an existing collecting agent is limited in applicability, insufficient in selectivity, poor in environmental stability and the like and is difficult to deal with separation of fluorite ore containing various impurities or under complex working conditions. The composite collecting agent is composed of dehydroabietylamine, sodium oleoyl sarcosinate, sodium silicate-citric acid composite salt, ethylene glycol butyl ether and a sodium carbonate-sodium bicarbonate buffer pair, all the components have a synergistic effect, dehydroabietylamine provides selective collecting and fine particle agglomeration functions, sodium oleoyl sarcosinate enhances adsorption stability, the composite salt inhibits gangue in a targeted mode, and therefore the adsorption efficiency is improved. Buffer pairs and ethylene glycol butyl ether guarantee the environmental adaptability of a system. The collecting agent can adapt to various fluorite ores with high sulfur, high silicon, low temperature and the like, can stably play a role under different water quality and working conditions, realizes efficient separation of fluorite and impurities, improves the separation efficiency and the concentrate quality, and is flexible in preparation process and convenient for industrial application.

The application discloses a method for improving the quality and moisture content distribution of bean curd by soaking and using water for pulp grinding, and comprises the following steps: (1) pretreatment: accurately weighing CaCl2, MgCl2, KCl and cellulase according to different proportions, dissolving in deionized water, and preparing for use; (2) adjusting pH value: taking sodium bicarbonate, dissolving in the prepared deionized water, and adjusting the pH value; (3) raw material preparation: weighing 500g of yellow beans, pouring into the prepared deionized water in step (2), and soaking for about 8-10h; (4) bean curd preparation: preparing the bean curd product rich in various ions according to the process flow by using the soaked yellow beans. The application has the advantages of simple process, low production cost and suitability for industrial production, and solves the problem that the quality of bean products is different due to different water qualities in different regions for yellow bean processing enterprises.

The invention discloses a preparation method of micromolecular active collagen peptide, which comprises the following steps: (1) cutting fresh leather into fragments, pretreating the leather with a sodium bicarbonate solution, rinsing the leather with deionized water, and refrigerating and storing; (2) mixing papain, bromelain, pancreatin, pepsase, alkaline protease, neutral protease and flavourzyme to obtain a compound enzyme preparation; (3) performing high-pressure steam sterilization on the leather at 110-140 kPa and 120-122 DEG C to obtain leather with the hydrolysis degree of 75-85%, then adding distilled water into the leather to obtain mucilage, then adding a compound enzyme preparation into the mucilage, reacting for 5.5-6.5 hours at the pH of 6.8-7.2 and the temperature of 50-55 DEG C, and then performing enzyme inactivation at the temperature of 85-95 DEG C; and (4) after the reaction system is cooled to room temperature, purifying and centrifuging the reaction system, and taking clarified supernate, thereby obtaining the product. Different animal skins are treated, the proportion of peptide fragments with the molecular weight smaller than 1000 Da of the prepared small-molecule active collagen peptide is larger than or equal to 80%, and the hydroxyproline content is larger than 3%.

The invention relates to the technical field of cables, and discloses an aluminum alloy conductor cable with a flame-retardant function. The cable is provided with the cable inner expansion layer, the cable outer expansion layer and the functional layer, when the cable sheath is damaged by flames, the cable outer expansion layer is in contact with the flames, expandable graphite in the cable outer expansion layer begins to expand to fill the missing part of the cable sheath, then sodium bicarbonate in the functional layer begins to undergo a thermal decomposition reaction, and the thermal decomposition reaction is stopped; carbon dioxide and water vapor generated by thermal decomposition reaction penetrate through the outer expansion layer of the cable and are directly contacted with flames at the notches, an auxiliary fire extinguishing effect can be achieved, along with continuous combustion of the flames, heat is transmitted to the inner expansion layer of the cable at the moment, expandable graphite in the inner expansion layer of the cable begins to expand, an upward pushing effect is achieved, and fire extinguishing is achieved. And the expandable graphite is pushed outwards at the gap of the cable sheath, so that the flame is far away from the cable insulating layer, and the effect of blocking the flame is achieved.

The invention relates to the technical field of chemical fiber manufacturing, in particular to a preparation process of graphene reinforced porous hollow polyester fibers. The problems that existing polyester fibers are insufficient in mechanical property and poor in moisture absorption and air permeability are solved. The preparation method comprises the following steps: modifying a PET sheet by using 2, 2-dimethylolpropionic acid and hydroxyl-terminated polydimethylsiloxane to obtain modified PET; the preparation method comprises the following steps: taking chitosan modified graphene as a carrier, and loading metal ions to obtain loaded graphene; polyethylene glycol and sodium bicarbonate are used as pore-foaming agents; modifying octadecyl dimethyl allyl ammonium chloride to obtain an antibacterial toughening agent; all the components are mixed, and the polyester fiber is prepared through melt spinning, stretching, heat treatment and alkali treatment. The mechanical property of the fiber is improved through the introduction of graphene and the modification treatment of the PET sheet; by utilizing the composite pore-foaming agent and adjusting the process, the moisture absorption and air permeability of the fiber are improved, and the service life of the fiber is prolonged.

The application discloses a kind of nanocellulose modified acrylic water-based emulsion and its preparation method and application, it is related to the technical field of polymer composite.A kind of modified acrylic water-based emulsion includes 180-220 parts of acrylate monomer, 45-60 parts of functional monomer, 3-5 parts of nanocellulose liquid, 4-6 parts of emulsifier, 1.5-2 parts of initiator, 2-3 parts of sodium bicarbonate and 275-300 parts of deionized water, wherein functional monomer includes hydroxy acrylate, acrylonitrile and fluorine-containing acrylate.By using fluorine-containing acrylate with nanocellulose to modify acrylic emulsion, water-based emulsion with good film-forming performance can be prepared, and the formed coating has good adhesion, stain resistance, heat oil resistance and mechanical strength, if the water-based emulsion is applied to the surface modification of filter material, not only can improve the hand feeling of filter material, but also can improve the stain resistance and service life of filter material surface.

The invention discloses a preparation method of a foamed thermal-insulation ceramic decorative plate in the technical field of building decorative materials. The method comprises the following steps: carrying out ball milling, spray drying, granulating and ageing on raw materials such as ceramic waste and kaolin; mixing and dispersing the aerogel-hydrogel gradient core-shell structure composite modified material and ceramic particles, and sieving to obtain composite powder; compounding sodium bicarbonate and azodicarbonamide with a foaming agent, mixing the foaming agent with the composite powder, and adding a surfactant and a dispersing agent to adjust the viscosity so as to prepare expandable ceramic slurry; the slurry is injected into a mold and coated with low-temperature glaze, and stepped heating sintering is conducted through a tunnel kiln and comprises the steps of preheating glue discharging, primary foaming, secondary sintering, gradient cooling and the like. The thermal insulation performance, the mechanical strength, the weather resistance and the decoration performance are synergistically improved, and the product is low in heat conductivity coefficient, high in compressive strength, excellent in ultraviolet aging resistance, firm in decoration layer combination and suitable for building outer walls and other scenes.

The invention discloses an aqueous film-forming foam extinguishing agent based on a short fluorocarbon chain, and relates to the technical field of extinguishing agents. The invention discloses an aqueous film-forming foam extinguishing agent based on a short fluorocarbon chain. The cleaning agent is prepared from the following raw materials in parts by weight: 8 to 12 parts of modified short fluorocarbon chain surfactant, 5 to 8 parts of dodecyl dimethyl betaine, 50 to 60 parts of deionized water, 2 to 4 parts of modified guar gum, 4 to 6 parts of ethylene glycol, 1 to 2 parts of benzotriazole, 0.5 to 1 part of sodium bicarbonate, 0.3 to 0.5 part of polydimethylsiloxane, 3 to 5 parts of decabromodiphenyl ethane and 1 to 2 parts of sodium carboxymethyl cellulose. 0.5 to 1 part of disodium ethylene diamine tetraacetate, 0.2 to 0.4 part of isothiazolinone and 0.5 to 1 part of nano silicon dioxide. According to the aqueous film-forming foam extinguishing agent based on the short fluorocarbon chain, the modified short fluorocarbon chain surfactant and the nano silicon dioxide cooperate, so that a film is formed quickly and compactly, and the extinguishing efficiency is high; the modified guar gum improves the foam stability, and the foam holding time is long; the raw material ratio is scientific, and both equipment protection and fire control are considered; the preparation process is rigorous, the product quality is stable, and various fire extinguishing scenes are adapted.

The invention discloses a preparation method of a flexible electronic device with specific wet adhesion capability, which comprises the following steps: dissolving acrylamide Am, methacrylic acid esterified gelatin GelMA and chitosan powder in an acetic acid solution, uniformly stirring, adding carboxylated multi-walled carbon nanotubes (MWCNTs) into the mixed solution, stirring uniformly, and drying to obtain the flexible electronic device with specific wet adhesion capability. Performing ultrasonic treatment, water bath treatment and degassing treatment to obtain a precursor solution; the preparation method comprises the following steps: mixing sodium monohydrogen phosphate and sodium dihydrogen phosphate, adding sodium bicarbonate, adding ammonium persulfate as an initiator, fully stirring, and degassing to obtain a gelling solution for inducing physical crosslinking of chitosan; selecting a material with carboxyl, amino and hydroxyl groups to manufacture a mold for polymer cross-linking molding; and mixing and stirring the precursor solution and the gelling solution, injecting into a prepared mold, placing at room temperature, and integrally forming to manufacture the flexible electronic device. The invention further discloses application of the flexible electronic device in preparation of a bioelectric sensor sensitive element and tissue repair.

The invention discloses a post-treatment method of cellulose acetate butyrate. The post-treatment method comprises the following steps: 1) adding polyethylene glycol and a sodium bicarbonate aqueous solution into a to-be-precipitated solution containing cellulose acetate butyrate to obtain a to-be-precipitated mixed solution; 2) dissolving the to-be-precipitated mixed solution in an aqueous solution of low-carbon alcohol for precipitation to obtain a precipitation solution; and 3) carrying out solid-liquid separation on the precipitation liquid to obtain solid particles, and washing and drying to obtain the cellulose acetate butyrate. The method provided by the invention can replace the existing production route of precipitating esterification liquid with pure water and washing CAB products with pure water, can effectively avoid solid particle aggregation, is easy to wash and remove butyric acid, can also prevent alcohol and butyric acid from esterification reaction, and is especially suitable for industrial production of CAB with high purity and narrow particle size distribution.

The invention relates to the technical field of textile double-sided printing, in particular to a high-permeability and double-sided positioning printing method for all-cotton towel products, which comprises the following steps: pre-treating all-cotton towel gray cloth, including desizing, scouring and bleaching procedures; padding the treated gray cloth in slurry containing urea, sodium bicarbonate, anhydrous sodium sulphate and a penetrant, and then drying and sizing; printing on the front surface of the towel by adopting a digital printing machine, and spraying a penetrating agent with the surface tension of 25-35mN / m to a printing area through an independent jet printing channel, so as to promote the dye to fully permeate to the back surface of the fabric and form a clear pattern outline; according to the invention, an image acquisition system composed of an industrial camera, an annular LED coaxial light source and a polarization filter captures fabric back pattern contour features in real time, and generates a translation, rotation and zooming transformation matrix based on an image registration algorithm; in combination with closed-loop feedback control of the digital printing machine, the positioning precision is improved by more than 75% compared with a traditional method.

The invention discloses a pH-responsive alkaline clean fracturing fluid as well as a preparation method and application thereof, and belongs to the technical field of oil and gas field fracturing. The cleaning agent comprises the following components in parts by mass: 1-5 parts of an anionic surfactant, 1-5 parts of a zwitterionic surfactant, 0.2 part of a pH regulator and 100 parts of deionized water, wherein the anionic surfactant is sodium oleate or sodium stearate; the zwitterionic surfactant is erucyl amide propyl betaine or oleamide propyl betaine; and the surfactant is a surfactant. The pH regulator is any one of sodium hydroxide, potassium hydroxide and sodium bicarbonate. The fracturing fluid is a clean fracturing fluid system based on pH response type micelle dynamic reconstruction, and through the synergistic effect of a specific surfactant and a pH response mechanism, accurate and rapid regulation and control of viscosity, zero residue damage and construction process simplification are achieved; the technical problems that an existing surfactant fracturing fluid is complex in compounding process, cannot be recycled after gel breaking, is slow in gel breaking response and narrow in application range are solved.

The invention belongs to the technical field of reflectors, and particularly discloses a reflector preparation method based on micro-channel heat dissipation, and the method comprises the steps: obtaining a first mirror body and a second mirror body, and plating a reflecting film on one side of the first mirror body and one side of the second mirror body; the method comprises the following steps: performing micro-fluidic groove parameterization design according to three-dimensional data of a lens body, establishing an optimization model which only takes geometric parameters as independent variables, outputting performance evaluation indexes through coupling heat transfer-fluid-structure simulation, and performing iterative updating on the geometric parameters based on an evaluation result; processing parameters are generated, a micro-flow groove is formed through picosecond laser etching, and the groove wall is polished through femtosecond laser; deionized water washing, cerium oxide grinding, sodium bicarbonate cleaning and secondary washing are sequentially carried out; and bonding the two mirror bodies into a mirror surface. According to the method, under the condition that processing, tolerance and operation boundary constraints are met, comprehensive optimization of low temperature rise, low surface shape change and low pressure drop of the mirror surface is achieved, and the optical stability and reliability under high-power application are improved.

The invention discloses a Karstedt catalyst and a preparation method thereof, and belongs to the technical field of catalysts. The preparation method provided by the invention comprises the following steps: firstly, chloroplatinic acid reacts with three different siloxanes to generate a zero-valent platinum complex, the siloxanes are tetradimethyl vinyl siloxy silane, tetramethyl divinyl disiloxane and 1, 3-dimethyl-1, 1, 3, 3-tetraethylene disiloxane, calcium oxide is added in the reaction to be matched with sodium bicarbonate to neutralize, and then the zero-valent platinum complex is obtained. And after the reaction, reducing residual bivalent platinum by using sodium borohydride, and finally loading by using an SBA15 molecular sieve as a carrier to obtain the finished product Karstedt catalyst. The multi-ligand Karstedt catalyst is formed by combining a tetradentate ligand, a conventional chain ligand and a branched chain polyvinyl ligand, the multi-ligand Karstedt catalyst has high catalytic activity and stability, the loading capacity and the loading binding force are improved through a network architecture of a complex configuration, the dosage of the supported catalyst is reduced, and the cyclic utilization rate is improved.

The preparation method comprises the following steps: taking 280 to 330 parts of cement, 55 to 70 parts of mineral powder, 28 to 32 parts of fly ash, 760 to 800 parts of sand, 960 to 1050 parts of stone, 130 to 150 parts of water, 4 to 5 parts of a water reducing agent and 30 to 40 parts of modified expanded fly ash microspheres, and uniformly mixing, so as to obtain the environment-friendly concrete. The modified expanded fly ash microspheres are prepared by the following steps: uniformly mixing fly ash, water and a foaming agent, carrying out high-speed centrifugal rotary spraying treatment to obtain fly ash microspheres, carrying out dehydration expansion on the fly ash microspheres in an electric furnace, and melting the fly ash microspheres into balls to obtain the modified expanded fly ash microspheres, and the foaming agent is selected from sodium monohydrogen carbonate, sodium nitrate or calcium carbonate. According to the invention, the heat conductivity coefficient of the concrete is reduced from the initial about to about about, the compressive strength of the concrete in 28 days is increased from the initial about 40 MPa to about 60 MPa, and the bleeding rate is reduced from the initial 20% to the final about 5%, so that the concrete achieves the best heat preservation effect and has the highest strength.

This invention provides a breathable plaster matrix for application and its preparation method, belonging to the field of polymeric dressings and plasters. The plaster matrix raw materials include terpene-modified rosin beeswax, hydrogenated rosin glyceryl ester, camellia oil, castor oil, stearic acid hydrophobically modified microcrystalline cellulose, zinc oxide, glycerin, coated citric acid, sodium bicarbonate, polyethylene glycol, camphor, and menthol. The terpene-modified rosin beeswax is prepared by reacting rosin and α-pinene in the presence of di-tert-butylperoxyisopropylbenzene, followed by the addition of white beeswax and maleic anhydride, and then the addition of trimethylolpropane. The stearic acid hydrophobically modified microcrystalline cellulose is microcrystalline cellulose coated with stearic acid. The coated citric acid is citric acid coated with hydrogenated castor oil. This invention's plaster matrix significantly improves skin breathability, application comfort, and biocompatibility while ensuring sufficient adhesion, formability, and drug loading capacity.

The invention discloses a desert blue-green algae large-scale culture nutrient solution and application thereof. The desert blue-green algae large-scale culture nutrient solution is prepared from urea, monopotassium phosphate, potassium chloride, sodium bicarbonate and medium trace element fertilizer. Wherein the concentrations of the urea, the monopotassium phosphate, the potassium chloride, the sodium bicarbonate and the medium trace element fertilizer are 500-550 mg / L, 20-30 mg / L, 10-15 mg / L, 10-15 mg / L and 10 mg / L respectively. The invention provides a nutrient solution special for large-scale cultivation of desert blue-green algae, and solves the technical problems of high cost, low yield and low blue-green algae purity of large-scale cultivation of desert blue-green algae in the prior art. The nutrient solution composition provided by the invention can balance each nutrient composition, so that the nutrient composition can be more suitable for the nutritional requirements of the growth of the desert blue-green algae.

The invention provides a calcium salt improver which comprises the following components in parts by mass: 15-25 parts of calcium chloride, 40-50 parts of trehalose, 30-40 parts of sodium bicarbonate and 3-6 parts of glycine. The invention further provides a method for improving the quality of the aquatic products by the bubbling pickling process in cooperation with the calcium salt, the calcium salt modifier and ice water are added into the pickling container, air is compressed for bubbling, so that the calcium salt modifier is fully dispersed in the ice water, and pickling liquid is obtained; placing the aquatic products in the pickling liquid, bubbling and pickling the aquatic products by compressed air, and cleaning the aquatic products after the pickling is finished, so as to obtain the pickled aquatic products. According to the invention, a bubbling pickling process is utilized to cooperate with the calcium salt modifier, so that the friction force on the raw materials is smaller, the problem that calcium salt is easy to precipitate can be solved, and the phenomenon of uneven local accumulation is avoided. The method is improved from physical and chemical levels, the original taste of the aquatic products is kept, the texture of the aquatic products is improved, and the overall quality and the fresh-keeping effect of the products are improved.

A pellet includes a starch in an amount of approximately 50 to 98 weight percent, a plasticizer in an amount of approximately 2 to 25 weight percent, water in an amount of approximately 1 to 40 weight percent, and a blowing agent in an amount approximately 1 to 25 weight percent. The pellet may have a density of approximately 20 to 65 pounds per cubic foot. The blowing agent may include sodium bicarbonate and / or ammonium bicarbonate.

The application provides a low-cost, low-odor, low-VOC-emission and excellent-mechanical-property EPDM (Ethylene Propylene Diene Rubber) foaming material and a preparation method thereof, and belongs to the technical field of high polymer materials. The application realizes slow release control by adopting a PVA / SiO2 composite coated citric acid-sodium bicarbonate foaming agent, and is synergistically compounded with odorless organic foaming agent 4,4'-oxobisbenzenesulfonylhydrazide (OBSH), so as to optimize the cell structure through a binary foaming system (CO2+N2). The foaming agent applied in the EPDM foam material can significantly improve the mechanical property of the EPDM foaming material, effectively reduces the VOC emission, has good environmental protection and stability, and is suitable for automobile, rail transit and other fields, and has a wide application prospect.

The invention relates to a modification method of a warm-keeping anti-migration down feather fiber material, and belongs to the technical field of feather fiber treatment. Down feather is activated through sodium bicarbonate and fatty alcohol-polyoxyethylene ether, bottom layer anchoring and protection are carried out through PDA-PEI, dynamic covalent cross-linked network construction is carried out through a modification liquid I, and hydrophobic aerogel loading is carried out through a modification liquid II. The modified liquid I contains polyvinyl alcohol, borax, a water-based anionic aliphatic polyurethane resin dispersion, a BYK-349 surfactant, guar hydroxypropyltrimethyl ammonium chloride and the like; the modified liquid II is prepared from hydrophobic nano silicon dioxide aerogel powder, a KH550 silane coupling agent, a BYK-111 dispersing agent, polyether modified polydimethylsiloxane, cetyl phosphate, absolute ethyl alcohol, ammonia water and the like. A three-layer structure of bottom layer anchoring, middle buffering and surface layer dewatering is formed, and through cooperation of the three layers, the initial filling power retention rate is very high, heat and humidity resistance is achieved, the heat preservation performance is good, durability is good, and performance attenuation is slow.

Provided is a method for producing a solution of atropine with improved recovery. A method for producing a solution of atropine-211, comprising the steps of: irradiating bismuth with alpha rays, generating atropine-211 in the bismuth, and distilling the bismuth irradiated with the alpha rays, separating and purifying atropine-211, and dissolving it in an aqueous sodium bicarbonate solution.

The invention relates to the technical field of water treatment, in particular to a preparation method of a 3D printing activated carbon rod based on coffee grounds, a product and water purification and adsorption application of the 3D printing activated carbon rod based on the coffee grounds, and the preparation method comprises the steps that 1, the coffee grounds are collected, washed, dried to constant weight, smashed and sieved, and coffee grounds fine powder is obtained; step 2, mixing sodium carboxymethyl cellulose with polylactic acid to prepare a binder, then adding deionized water into the binder, stirring until the deionized water is completely dissolved, and cooling to room temperature to form a binder solution; step 3, uniformly mixing the coffee residue fine powder, the binder solution, a pore forming agent and a reinforcing agent to prepare a 3D printing material; wherein the pore forming agent is a mixture of sodium bicarbonate and starch, and the reinforcing agent is nano silicon dioxide; 4, the 3D printing material is formed through a 3D printing technology, a carbon rod precursor is prepared, and then the carbon rod precursor is dried and cured; the adsorbent has high-efficiency adsorption performance and good structural stability, and meets actual application requirements.

The application relates to the technical field of medical detection, in particular to a detection kit for total bile acid and a detection kit for total bile acid. The application adds polyoxyethylene-polyoxypropylene copolymer, Span 40 and oxide in R1, and adds EDTA-Na2 and sodium bicarbonate in R2, so that the stability and precision of reagents are effectively improved, and the situation that a negative value is generated in the detection process is solved.

The application discloses an injectable self-healing self-assembling protamine extract hydrogel and a preparation method and application thereof, and belongs to the technical field of hydrogel materials and wound repair. The hydrogel is prepared by mixing protamine extract and a crosslinking agent solution; the crosslinking agent solution comprises a salt solution with a final concentration of 0.01-4.5 M, 0.01-0.1 M sodium citrate and 0.01-0.1 M sodium bicarbonate; the protamine extract is mixed with the crosslinking agent solution at different proportions (1%-50%, w / v%) and is stirred at 20-35 DEG C until complete gelation; and a series of hydrogels can be prepared after multiple freeze-thaw cycles. The hydrogel prepared by the application has good self-healing, injectable characteristics, blood compatibility and tissue regeneration capacity, and has a wide application prospect.

The invention relates to a method for purifying molten iron in a furnace based on a decomposable foaming sand core, and belongs to the technical field of foundry metallurgy. According to the method, an alkaline phenolic resin sand core internally provided with sodium bicarbonate is adopted, and the alkaline phenolic resin sand core extends into the position, 100-200 mm away from the bottom, in the furnace through a special clamp in the molten iron standing stage. Sodium bicarbonate in the sand core is slowly decomposed at high temperature to release a large number of microbubbles, and non-metallic inclusions in molten iron are effectively captured and brought out in the floating process. Deep and uniform purification of the molten iron is achieved through a slow-release foaming mechanism, the purity of the molten iron and the casting quality are remarkably improved, and the method has the advantages of being easy and convenient to operate, low in cost and free of additional equipment and is particularly suitable for the production process of cast iron smelting in an intermediate frequency furnace.

The application discloses a production process of hollow formed high-dietary-fiber small food and the hollow formed high-dietary-fiber small food prepared by the production process. The production process comprises the following steps: S1, mixing and fermentation: mixing high-dietary-fiber raw materials, gluten, yeast, starch, salt, sodium bicarbonate, water and oil into a dough, and fermenting; S2, calendering and cutting: calendering the dough multiple times to form a dough skin, and cutting the dough skin into pieces; and S3, baking, so as to obtain the hollow formed high-dietary-fiber small food. The product is formed into an ultra-large bubble and has a crisp taste by special process treatment and an optimal formula combination, so that the problem of hard texture and rough taste of the high-dietary-fiber product is greatly improved, and the high-dietary-fiber product has edibility and great market prospect.

This invention discloses an acetic acid-modified inorganic composite gel material and its preparation method, belonging to the field of organic material synthesis technology. The acetic acid-modified inorganic composite gel material comprises the following materials in parts by weight: 0.2-0.4 parts of acetic acid-Co3O4, 1.5-2.5 parts of acrylamide, 1-1.5 parts of glycerol, 0.05-0.1 parts of N-N-dimethylformamide, 0.25-0.5 parts of ammonium persulfate, 0.1-0.15 parts of sulfonated-Bi2O3, 0.6-0.9 parts of ethylenediamine, and 0.2-0.4 parts of PVP; the acetic acid-Co3O4 comprises materials in the following mass ratio: acetic acid:cobalt nitrate:thiourea:ammonium fluoride:sodium bicarbonate = 3-7:1.5-2.5:0.8-1.2:0.5-1:6; the sulfonated-Bi2O3 comprises materials in the following mass ratio: Bi2O3:sodium sulfite:H2O2:ammonium bicarbonate = 3-5:0.2-0.6:1-1.5:1. This material achieves efficient and stable catalysis for nitrogen reduction under mild conditions through structural defect regulation, interfacial functional group modification, heterojunction electronic regulation, and synergistic enhancement with organic gel.