648 results about "Acetic acid solution" patented technology

The invention is applicable to the technical field of intelligent response materials, and provides a three-dimensional azobenzene functionalized covalent organic framework intelligent response material and a preparation method thereof. The three-dimensional azobenzene functionalized covalent organic framework intelligent response material is prepared by uniformly grinding 3, 3 ', 5'-tetra [(3 ', 5'-diformylphenyl)]-hexamethyl biphenyl and azobenzene-4, 4 '-diaminotriphenylamine, adding an organic solvent, adding a catalyst acetic acid aqueous solution, quickly freezing, emptying air, sealing with flame, heating after recovering to room temperature, and obtaining the three-dimensional azobenzene functionalized covalent organic framework intelligent response material. According to the invention, the azobenzene functionalized covalent organic framework material with a bcu topological structure is synthesized; the material has excellent photostimulation response CO2 adsorption performance; reversible control of CO2 adsorption capacity can be realized through ultraviolet light and heating conditions, at least five times of circulation can be maintained, and good circulation stability is achieved.

The invention discloses a preparation method of a bionic cornea stroma lens for refractive correction, which comprises the following steps: solution preparation: dissolving type I collagen in an acetic acid solution, adding a film aid, fully stirring, and centrifugally defoaming to obtain a type I collagen composite solution; the I-type collagen composite solution is poured into an assembling groove, the curvature radius of titanium metal is set to be 6.8-8.0 mm, the titanium metal serves as a working electrode material, platinum metal serves as a counter electrode material, current parameters are set according to the needed thickness of the lens blank, the density is 3.50-6.50 mA / cm < 2 >, and the thickness of the lens blank is set to be 3.50-6.50 mA / cm < 2 >; a high-transparency cornea embryo material which is uniform in curvature in all directions and similar to human cornea fiber structure arrangement is formed after electrochemical assembly and cross-linking curing, accurate cutting machining is carried out through excimer laser, a concave / convex matrix lens with the needed correction degree is obtained, the correction precision is high after cornea interlayer implantation, and the correction precision is high. And meanwhile, the compound has excellent performance in the aspects of in-vivo stability and biological safety.

The invention discloses a preparation method of a cell inflammatory factor adsorbent, which comprises the following steps: mixing styrene, divinyl benzene and hydroxyethyl acrylate, and adding a pore-foaming agent and mesoporous SiO2 nano powder to prepare a porous microsphere carrier; the preparation method comprises the following steps: mixing chitosan and poly (N-isopropylacrylamide) in an acetic acid solution to obtain a temperature-sensitive chitosan hydrogel precursor solution; the preparation method comprises the following steps: activating the surface of a porous microsphere carrier by using 1-ethyl-(3-dimethylaminopropyl) carbodiimide and N-hydroxysuccinimide, mixing the activated porous microsphere carrier and a temperature-sensitive chitosan hydrogel precursor solution to obtain a water phase, and assembling, washing and drying in an oil phase to obtain the cell inflammatory factor adsorbent. Through the design of the core-shell structure and the addition of the mesoporous SiO2 nano powder, the temperature response characteristic and the recyclable characteristic are given to the cell inflammatory factor adsorbent, the adsorption capacity of cell factors is also improved, and a new solution is provided for physical adsorption of the cell inflammatory factors.

The invention relates to a lightweight porous nickel ferrite composite electromagnetic absorbing material and a preparation method thereof, and belongs to the field of electromagnetic wave absorbing materials, and the lightweight porous nickel ferrite composite electromagnetic absorbing material is a porous electromagnetic absorbing material prepared by high-temperature annealing of a mixture containing ferric salt, nickel salt, an acetic acid solution and chitosan. The lightweight and porous nickel ferrite composite electromagnetic absorbing material has both lightweight and electromagnetic absorbing properties.

The present invention discloses a chitosan-modified highly transparent antibacterial polylactic acid film and a preparation method and application thereof. The polylactic acid film comprises the following raw materials by weight: 10 to 16 parts of modified chitosan, 35 to 55 parts of polylactic acid, 5 to 15 parts of casein, 50 to 300 parts of solvent and 30 to 50 parts of gelatin, wherein the solvent comprises hexafluoroisopropanol and acetic acid solution. The antibacterial polylactic acid film provided by the present invention has good toughness, strength and transparency, is suitable for the field of food packaging, can extend the shelf life of food, and can reduce plastic waste pollution.

The invention provides a modified chitosan flocculant for slime water treatment. The modified chitosan flocculant is prepared from the following raw materials: chitosan, dimethyl diallyl ammonium chloride, acrylamide, acetic acid and potassium persulfate. The invention also provides a preparation method of the modified chitosan flocculant for slime water treatment. The preparation method comprises the following steps: dissolving chitosan in a dilute acetic acid solution with the mass concentration of 60%, and stirring; adding acrylamide and dimethyl propyl chloride cyclic amine into the mixed solution, uniformly stirring, adding a potassium persulfate solution with the mass concentration of 4%, and introducing nitrogen for 20 minutes; then carrying out microwave reaction, and cooling to room temperature after the reaction is completed; adding absolute ethyl alcohol, centrifuging for 10 minutes, taking out, and continuously soaking in absolute ethyl alcohol for 12 hours, so as to obtain a final insoluble substance which is a graft polymer CS-g-ADM; and drying the polymer in a drying box at 105 DEG C until no weight loss occurs, and then grinding and storing. The flocculating agent disclosed by the invention has relatively good flocculability.

The invention belongs to the field of pharmaceutical analysis, and discloses a method for simultaneously determining the contents of tolperidone hydrochloride, methyl hesperidin and vitamin B6 in Naoluotong capsules, the method comprises three steps of preparation of a mixed reference solution, preparation of a test solution and content determination, and the chromatographic conditions of the content determination are as follows: a C18 chromatographic column, a C18 chromatographic column, a C18 chromatographic column, a C18 chromatographic column, a C18 chromatographic column, a C18 chromatographic column, a C18 chromatographic column, a C18 chromatographic column and a C18 chromatographic column; a mobile phase is methanol (A)-0.1% glacial acetic acid solution (B), gradient elution is carried out for 0-5 min, and 96% of B is obtained; 5-6 min, 96%-60% of B is selected; 6-20 min, the content of B is 60%-50%; the volume flow rate is 1.0 ml / min; the column temperature is 30 DEG C; the detection wavelength is 291 nm; the sample size is 1 microliter. According to the method, synchronous detection of three components (tolperidone hydrochloride, methyl hesperidin and vitamin B6) with remarkable physicochemical property difference can be realized, the chromatographic condition is simple, and the detection speed is high.

The invention discloses a perfluorinated compound adsorption material and a preparation method thereof. Comprising the following steps: 1) placing moso bamboo in a high-temperature carbonization furnace for carbonization treatment, after carbonization is completed, taking out bamboo charcoal, carrying out acid treatment to remove surface impurities and part of ash, then repeatedly washing the bamboo charcoal with deionized water until the bamboo charcoal is neutral, and finally drying the bamboo charcoal to obtain pretreated bamboo charcoal; and 2) putting the pretreated bamboo charcoal into a chitosan acetic acid solution to load chitosan on the surface of the bamboo charcoal, repeatedly washing the bamboo charcoal with deionized water to remove unloaded chitosan, and then drying to obtain the perfluorinated compound adsorption material. The prepared adsorption material has high adsorption capacity and selectivity on perfluorinated compounds, the adsorption performance of the adsorption material on the perfluorinated compounds is improved by modifying the bamboo charcoal, and the adsorption capacities of the adsorption material on perfluorooctanoic acid and perfluorooctane sulfonic acid can reach 400 mg / g and 450 mg / g respectively.

The invention discloses a preparation method of antibacterial and hemostatic medical sponge, and relates to the technical field of preparation of medical sponge. The preparation method of the antibacterial hemostatic medical sponge comprises the following steps: cleaning silkworm cocoons after removing impurities, and immersing the cleaned silkworm cocoons in a neutral protease solution to complete degumming so as to obtain fibroin fibers; the preparation method comprises the following steps: dissolving chitosan in an acetic acid solution, dissolving polyvinyl alcohol in deionized water, adding sodium alginate, adding a silk fibroin solution to form a composite solution, dropwise adding an AgNO3 solution, introducing CO2, maintaining the pressure, quickly releasing the pressure, foaming, injecting into a mold, carrying out gradient freezing to form a multistage-aperture sponge matrix, immersing in a genipin ethanol solution, and transferring into a 5% CaC 12 solution for soaking. The silk fibroin provides a biocompatible substrate and promotes cell adhesion, the sponge is constructed into a hierarchical pore structure with a compact surface and a loose interior, and liquid absorption and blood coagulation factor enrichment are accelerated.

The invention relates to a degradable composition and flame-retardant degradable plastic. The degradable composition comprises PLA particles, modified lignin and a bio-based flame retardant, wherein the modified lignin is obtained by grafting polycaprolactone on lignin and then forming a core-shell structure on the surface of silane coupling modified calcium carbonate; the preparation method of the bio-based flame retardant comprises the following steps: heating and dissolving chitosan in an acetic acid solution, introducing nitrogen, adding an initiator, then adding a DOPO derivative with double bonds at the tail end, MDO and AA, and carrying out a polymerization reaction to prepare the flame retardant. According to the scheme, the lignin-PCL / calcium carbonate core-shell toughening agent and the P-N synergistic chitosan flame retardant are prepared and are jointly added into the PLA, the compatibility with the PLA is good, the problem of high brittleness of the PLA can be effectively solved, the elongation at break is improved, meanwhile, the material is endowed with flame retardance, and the biodegradability of the PLA material can be well kept.

The invention relates to the technical field of electro-catalysis, in particular to a modified iron monatomic catalyst based on biomass carbon as well as a preparation method and application of the modified iron monatomic catalyst. The preparation method comprises the following steps: mixing and stirring chitosan, an acetic acid solution, thiourea and ferric chloride, adjusting the pH value to 7.5-8.5, and freeze-drying to obtain an aerogel precursor; pre-carbonizing the aerogel precursor to obtain a pre-carbonized product; mixing the pre-carbonized product with an alkali reagent, and calcining to obtain a metal nanoparticle doped monatomic catalyst; and carrying out ultrasonic treatment on the metal nanoparticle doped monatomic catalyst by using a mixed acid solution, washing to be neutral, and drying to obtain the modified iron monatomic catalyst. By adopting the modified iron monatomic catalyst provided by the invention, non-polar CO2 molecules and NO3 <-> are efficiently converted into urea under mild conditions, the yield of the urea is up to 2978.6 mu g h <-1 > mgcat <-1 >, and the maximum Faraday efficiency is up to 30.4%.

The invention relates to the technical field of preparation of astaxanthin sustained-release microspheres, and discloses chitosan-based astaxanthin sustained-release microspheres and a preparation method thereof.The method comprises the steps that chitosan powder is dissolved in an acetic acid solution, the pH value is adjusted, and a chitosan solution is prepared; dissolving astaxanthin in ethanol, and then adding the chitosan solution; adding a cross-linking solution into the emulsified solution, and performing cross-linking under a magnetic stirring condition to form astaxanthin sustained-release microspheres; adding the astaxanthin sustained-release microspheres into a strengthening solution for strengthening treatment; carrying out coating treatment on the astaxanthin sustained release microspheres subjected to the strengthening treatment; carrying out centrifugal treatment on the solution subjected to coating treatment, and collecting astaxanthin sustained-release microspheres subjected to centrifugal separation; and washing the collected astaxanthin sustained-release microspheres with PBS (Phosphate Buffer Solution). According to the invention, chitosan is used as a carrier to prepare the astaxanthin sustained-release microspheres, so that the astaxanthin can be continuously and stably released in intestinal tracts, the antioxidant and anti-inflammatory activity of the astaxanthin can be fully exerted, and further, the astaxanthin sustained-release microspheres have an effective treatment effect on osteoarthritis.

The invention relates to the technical field of medical dressings, in particular to a liquid adhesive bandage and a preparation method thereof.The preparation method comprises the following steps that according to the formula amount, sodium chloride and sodium citrate are added into water, and a mixture A is obtained; adding copper gluconate into the mixture A to form a mixture B; mixing Tween 20 with glycerin, adding L-menthol, and stirring to form a mixture C; adding the mixture C into the mixture B to form a mixture D; the preparation method comprises the following steps: adding acetic acid into water, uniformly mixing, adding chitosan, and dissolving to obtain a chitosan-acetic acid solution; adding a chitosan-acetic acid solution into the mixture D, and dissolving to form a mixture E; adjusting the pH value of the mixture E to 4.5-6.5, filtering, filling and sterilizing to obtain the liquid adhesive bandage. The prepared liquid adhesive bandage can quickly form a layer of protective film on the surface of a wound, effectively inhibits growth of bacteria and promotes wound healing, and meanwhile, the liquid adhesive bandage has good flexibility and comfort and small irritation.

The invention discloses a pretreatment method for efficiently extracting calcium in shrimp and crab shells. The pretreatment method comprises the following steps: carrying out microwave treatment on the shrimp and crab shells until the weight is constant, rehydrating for 10 minutes in a water bath at 90 DEG C, carrying out microwave treatment until the weight is constant, crushing, mixing with an acetic acid solution, stirring, centrifuging, and measuring the calcium concentration. According to the method, through microwave-rehydration-secondary microwave pretreatment, the carapace structure is destroyed, the contact area of organic acid and calcium is increased, the calcium recovery rate is increased, the treatment time is shortened, the energy consumption is reduced, the universality of raw materials is enhanced, comprehensive utilization of resources is facilitated, and the method is environmentally friendly and economical.

The invention discloses diaphragm coating slurry for a semi-solid battery and a preparation method of the diaphragm coating slurry, and belongs to the field of lithium battery diaphragms. The diaphragm coating slurry for the semi-solid battery is prepared from the following components in parts by weight: 10 to 15 parts of PI-COOH-coated TiO2 / APTMDS, 2 to 4 parts of a dispersing agent, 2 to 4 parts of a wetting agent, 2 to 4 parts of a thickening agent, 4 to 8 parts of a binding agent and 70 to 85 parts of water, the PI-COOH (at) TiO2 / APTMDS is prepared by the following steps: immersing PI particles into a NaOH solution for etching, and washing the PI particles with an acetic acid solution to obtain PI-COOH; the preparation method comprises the following steps: soaking PI-COOH in a TiOSO4 solution, carrying out ultrasonic cleaning, and heating to obtain PI-COOH coated TiO2; the preparation method comprises the following steps: dipping PI-COOH-coated TiO2 into an APTMDS methanol solution, standing, washing, and carrying out vacuum drying, so as to obtain PI-COOH-coated TiO2 / APTMDS.

The invention discloses a graphene oxide-chitosan-carboxymethyl cellulose composite aerogel and an application of the graphene oxide-chitosan-carboxymethyl cellulose composite aerogel in adsorption of amaranth. The preparation method comprises the following steps: mixing a carboxymethyl cellulose aqueous solution with a chitosan acetic acid solution, adding gallic acid, stirring until the gallic acid is completely dissolved, adding the graphene oxide dispersion liquid, and stirring until a system forms uniform and stable gel; the gel is firstly subjected to ultralow-temperature freezing and then subjected to freeze drying, and finally the graphene oxide-chitosan-carboxymethyl cellulose composite aerogel is obtained. The aerogel prepared by the method is environment-friendly and stable in pore structure, and is a composite aerogel material with high adsorption capacity and good regeneration performance on anionic dyes. The adsorption capacity of the aerogel to amaranth can reach 125 mg / g, the adsorption rate is still kept at 77% after the aerogel is recycled for 3 times, and the aerogel is suitable for efficient treatment of dye wastewater.

The invention relates to the technical field of multifunctional composite materials, in particular to wave-absorbing, photo-thermal and deicing integrated carbon aerogel and a preparation method thereof. The wave-absorbing, photo-thermal and deicing integrated carbon aerogel is characterized by comprising the following raw materials: 5-15 parts of a dominant bio-based material; 3-10 parts of an auxiliary bio-based material; 0.5 to 3 parts of cobalt salt; 1-5 parts of a photo-thermal material, namely an MXene material; a dispersion medium: 40-80 ml of a 1% v / v acetic acid solution; the concentration of the photo-thermal material dispersion liquid is 0.5 mg / mL to 2 mg / mL, and the concentration of the photo-thermal Compared with the prior art, the wave-absorbing, photo-thermal and deicing integrated carbon aerogel and the preparation method thereof have the advantages that through the collaborative design of a bio-based framework and MXene, the problems of function splitting, non-uniform photo-thermal material loading and insufficient wave-absorbing strength of an existing material are solved, collaborative fusion of photo-thermal deicing and wave-absorbing functions is realized, and the wave-absorbing performance of the wave-absorbing, photo-thermal and deicing integrated carbon aerogel is improved. The method is suitable for extreme environment protection scenes such as aerospace and wind power equipment.

The invention provides a COF (at) POC composite film and a preparation method and application thereof. The preparation method comprises the following steps: a) dissolving a COF aldehyde monomer and a POC aldehyde monomer in an organic solvent to obtain a first solution; meanwhile, dissolving a COF amine monomer and a POC amine monomer in an organic solvent to obtain a second solution; b) mixing the first solution, the second solution and an acetic acid solution to obtain a homogeneous membrane casting solution; and c) dispensing the homogeneous casting membrane liquid, and reacting to obtain the COF (at) POC composite membrane. Compared with the prior art, the preparation method provided by the invention has the advantages that specific raw materials are matched with specific process steps and conditions, the overall better interaction is realized, and the prepared COF-POC composite membrane is good in mechanical strength and has high ion flux and excellent ion selectivity for monovalent and divalent ion separation; the method has a wide application prospect in the fields of seawater desalination, salt lake lithium extraction, drug separation and the like.

The invention relates to a method for recovering lithium and fluorine from aluminum electrolysis hazardous waste, which comprises the following steps: firstly, mixing organic polyol and alkaline hydroxide according to a molar ratio of 1: (0.5-2) to obtain a eutectic solvent; heating the eutectic solvent to 80-150 DEG C, and adding a proper amount of raw material fine powder and calcium oxide for reaction leaching; carbonating and filtering the leachate to obtain lithium carbonate; washing the leaching residues with an acetic acid solution to obtain a calcium fluoride product; the concentration of fluorine ions in the leachate is smaller than or equal to 200 ppm, and the purity of calcium fluoride is larger than or equal to 90%; the leaching rate of lithium in the method is greater than 85%; the slag feeding rate of fluorine is greater than 95%; and no hydrogen fluoride gas is generated in the method. According to the method, a non-toxic and biodegradable eutectic solvent is adopted as a leaching agent, and efficient leaching of lithium and fluorine in the aluminum electrolysis dangerous waste materials is achieved; calcium oxide is used as a precipitating agent, free fluorine is promoted to be precipitated and recycled as calcium fluoride, the whole process meets the requirement of green metallurgy, and the win-win situation of resources and the environment is achieved.

The invention provides a composite adsorbent and a preparation method and application thereof.The composite adsorbent is prepared by taking a food processing by-product banana peel which is low in cost, simple and easy to obtain as a raw material and adsorbing a modifier chitosan acetic acid solution on the banana peel, the components have a synergistic effect, the banana peel is taken as a carrier, and the composite adsorbent is prepared from the banana peel and the chitosan acetic acid solution. Hydroxyl and amino functional groups contained in the modifier increase adsorption sites of the modifier to chloropropanol, and the specific combination mode of the banana peel and the chitosan acetic acid solution makes the functional groups on the composite adsorbent fully utilized, so the adsorption capacity of the composite adsorbent to the chloropropanol is improved, and the effect of removing the chloropropanol in the polyamide epichlorohydrin papermaking wet strength agent is significant; and the banana peel is natural, green and non-toxic and does not cause secondary pollution to the wet strength agent, meanwhile, the resource utilization efficiency of agricultural and sideline products can be improved by using the banana peel, and wide application prospects are achieved.

The application discloses a kind of nano magnetic flocculants and its preparation method and application, belong to drinking water processing technical field, including the following steps: step S1, modified ferroferric oxide nanosphere is ultrasonically dispersed in ammonia alcohol solution, while stirring, slowly drop adding tetraethyl orthosilicate, continue stirring after drop, after centrifugal separation, wash, obtain silica coated ferroferric oxide nanoparticles;Step S2, phenylalanine modified chitosan is added into glacial acetic acid solution, after completely swelling and dissolving, add silica coated ferroferric oxide nanoparticles and ultrasonic treatment, under low pressure ultraviolet lamp, then with anhydrous ethanol wash purification, vacuum drying to constant weight, obtain nano magnetic flocculants;The method of the application is simple and easy to operate, the nano magnetic flocculants prepared can be quickly adsorbed to the surface of sulfonamide antibiotics, produce flocculation and can be magnetically separated, very suitable for trace sulfonamide antibiotics in drinking water source efficient removal.

The invention belongs to the technical field of water treatment, and particularly relates to a preparation method and application of a PDA / CS composite adsorbent loaded with a bimetallic system, and the preparation method comprises the following steps: 1) dissolving dopamine in a Tris buffer solution to prepare a dopamine prepolymer solution; then adding FeCl3, and carrying out constant-temperature water bath; centrifuging the obtained black suspension, performing suction filtration, washing, collecting a filter cake, and performing freeze drying to obtain PDA microspheres; 2) dispersing PDA microspheres in deionized water, and carrying out ultrasonic treatment until the PDA microspheres are uniformly dispersed; 3) dissolving chitosan in an acetic acid solution, and adding CuCl2 to prepare a mixed solution; the suspension obtained in the step 2 is dropwise added into a mixed solution for constant-temperature water bath, the pH of the mixed solution is adjusted through a NaOH solution, glutaraldehyde is added for constant-temperature water bath after constant-temperature water bath, and 4, the obtained suspension is subjected to centrifugation, suction filtration, washing, filter cake collection and freeze drying.

The invention discloses a method for measuring the content of calcium fluoride in dolomite-containing fluorite mine. The method comprises an acetic acid solution, a hydrochloric acid solution, a triethanolamine solution, a potassium hydroxide solution and boric acid. The method for measuring the content of calcium fluoride in the dolomite-containing fluorite mine comprises the following steps: S1, reagent proportioning; s2, preparing a calcium standard solution; s3, preparing an EDTA standard titration solution; s4, selecting an instrument; s5, preparing a sample; s6, step analysis; s7, content correction and determination; and S8, calculating a result. The invention belongs to the technical field of calcium fluoride content determination, and particularly relates to a method for measuring the content of calcium fluoride in dolomite-containing fluorite mine, compared with the prior art, the method solves the problem of dolomite dissolution when calcium carbonate is leached by acetic acid, and the content of calcium fluoride in the fluorite mine can be measured by accurately calculating the dissolution amount of dolomite. The measured calcium fluoride content is clearer, more reasonable and more reliable and approaches to a true value, and the process operation is simple and rapid, and is suitable for the requirements in the fields of mine production, assay detection and the like.

The invention belongs to the technical field of food or medicine, and particularly relates to a preparation method of nattokinase sustained-release microspheres, which comprises the following steps: mixing an emulsifier span-80 with liquid paraffin to obtain an oil phase; adding chitosan into an acetic acid solution to prepare a chitosan water solution as a water phase; dropwise adding the water phase into the oil phase to prepare W / O type emulsion, dropwise adding a cross-linking agent A into the emulsion to obtain chitosan microspheres, and taking a chitosan microsphere nattokinase solution and a cross-linking agent B to obtain nattokinase-chitosan core microspheres; mixing the nattokinase-chitosan core microsphere with a cortisol aptamer solution, and incubating to enable the aptamer to be combined on the surface of the nattokinase-chitosan core microsphere; and adding a casein-PEG copolymer solution and a cross-linking agent C into the microspheres to obtain the cortisol response type intelligent switch microspheres. The nattokinase release amount can be dynamically adjusted day and night, the circadian thrombus risk rhythm is matched, the anti-thrombus effect is remarkably improved, side effects are reduced, and the nattokinase can be widely applied to the fields of functional food and drugs.

The invention discloses a preparation method of an environment-friendly water-based rubber protective film, and belongs to the technical field of rubber chemical modification. Comprising the following steps: mixing butadiene styrene rubber and nitrile rubber according to a mass ratio of 3: 1 to prepare an emulsion with the solid content of 40-50%, adding nano silicon dioxide and a silane coupling agent, and reacting at 50-60 DEG C for 2-3 hours to obtain a silane modified rubber emulsion; the preparation method comprises the following steps: preparing sodium alginate into a 2-3% aqueous solution, adding tributyl citrate and nano-zinc oxide, and carrying out ultrasonic dispersion for 30 minutes to obtain a composite cross-linking agent solution; dissolving chitosan in an acetic acid solution, adding propyl gallate and nano montmorillonite, and uniformly stirring and mixing to obtain a functional additive solution; adding the composite cross-linking agent solution and the functional additive solution into the modified rubber emulsion; by optimizing a formula system and a preparation process, the problems that an existing water-based protective film is poor in stability, low in drying speed, insufficient in water resistance and difficult to consider both flexibility and adhesive force are solved.

The invention relates to a preparation method of a biomass-based degradable dust suppressant and a spraying device. The biomass-based degradable dust suppressant is prepared from the following components in percentage by weight: 0.78% of a biological matrix, 20.7% of a salting-out salt solution and the balance of an acetic acid solution diluted by deionized water, the method comprises the following specific steps: adding biological matrix powder into an acetic acid solution; the salting-out salt solution powder is poured into a biological matrix acetic acid solution, magnetic stirring is conducted for 30 min under the conditions that the rotating speed is 200 r / min and the temperature is 30 DEG C, and then ultrasonic treatment is conducted for 10 min for full reaction; a salting-out method and a dust suppression technology are combined, high-concentration salt solutions such as sodium citrate and sodium sulfate are selected, physical and chemical effects between salt ions and biomass material molecules are utilized, and the limitation of a traditional cross-linking mode is broken through the synergistic effect of salting-out auxiliary precipitation and weak ion cross-linking net forming; according to the present invention, the long-acting and safe dust suppression agent can be simply and conveniently prepared, the dust suppression efficiency can be effectively improved, and the dust suppression cost can be effectively reduced.

The invention discloses a three-dimensional bio-based hierarchical pore nanocarbon water photovoltaic power generation material as well as a preparation method and application of the three-dimensional bio-based hierarchical pore nanocarbon water photovoltaic power generation material. The specific technical scheme of the preparation method comprises the following steps: firstly, preparing an acetic acid solution containing chitosan, glucose and borax, and standing the solution at room temperature for 24 hours; then, freeze-drying the precursor solution, and pre-carbonizing xerogel in a drying oven for a certain time; and finally, adding a certain amount of water into the pre-carbonized dry gel, putting the pre-carbonized dry gel into a reaction kettle with a polytetrafluoroethylene lining, reacting for a certain time at a certain temperature, dialyzing the obtained wet gel, and drying at normal temperature and normal pressure to prepare the nano carbon aerogel with the hierarchical pore structure. The nano carbon aerogel has good hydrophilicity, abundant surface charges and a hierarchical pore structure, and is a low-cost and excellent water evaporation induced power generation material.

The invention provides a method for extracting and separating rare earth and aluminum from an acetic acid solution by using dynamic difference, which comprises the following steps: extracting the acetic acid solution containing rare earth and aluminum for 5-30 seconds by using an organic phase containing a phosphoric acid extracting agent to realize selective separation of rare earth and aluminum ions to obtain a rare earth-loaded organic phase and an aluminum-containing raffinate; the phosphoric acid-containing extraction agent comprises a P204 extraction agent and / or a P507 extraction agent; in the acetic acid solution containing rare earth and aluminum, the concentration sum of acetic acid and acetate is 0.3 mol / L-3. 5mol / L; the pH value of the acetic acid solution containing rare earth and aluminum is 4.0-5.0. As the coordination constant of aluminum ions and acetate is larger than that of rare earth ions and acetate, when the method is used for treating the acetic acid solution containing rare earth and aluminum, rare earth can be directly extracted and separated from the solution, and meanwhile, the method has the advantages that the operation is simple and convenient, and the method can be realized by using existing conventional equipment.

The invention discloses a temperature-controlled anti-inflammatory and antibacterial skin wound dressing capable of promoting revascularization and a preparation method and application thereof, and relates to the technical field of medical materials, the preparation method comprises the following steps: S1, preparing calcium peroxide microspheres; s2, the poloxamer 407, the chitosan and the forsythiaside A are jointly dissolved in an acetic acid solution, and mixed gel is obtained; s3, dispersing calcium peroxide microspheres into the mixed gel to obtain the skin wound dressing capable of controlling temperature, resisting inflammation and bacteria and promoting revascularization. The traditional Chinese medicine active ingredient forsythiaside A is loaded, so that the healing efficiency of diabetic wounds is improved; due to the temperature-sensitive property of the gel, the gel can be better attached to the wound, the antibacterial property can inhibit microorganism breeding at the wound surface, the oxygen release capacity can improve the anoxic environment at the wound, and the loaded traditional Chinese medicine active ingredient forsythiaside A has the anti-inflammatory capacity, promotes cell regeneration at the wound and accelerates the repair process.

The invention is applicable to the technical field of biomedical materials, and provides an anti-inflammatory hemostatic composite gel microsphere and a preparation method and application thereof, and the preparation method comprises the following steps: mixing sodium alginate and baicalin, dissolving in deionized water to obtain a mixed solution, spraying the mixed solution into a calcium chloride solution by utilizing electrospinning and electrospraying, and carrying out electrostatic spinning and electrospraying to obtain the anti-inflammatory hemostatic composite gel microsphere. Gel microspheres are formed through ionic crosslinking; washing the gel microspheres with a calcium chloride solution, and soaking the gel microspheres in a chitosan acetic acid solution to obtain chitosan-encapsulated gel microspheres; placing the gel microspheres in a copper sulfate solution, and performing low-temperature calcium-copper ion exchange to obtain baicalin / copper alginate composite gel microspheres; and filtering, washing and freeze-drying the composite gel microspheres. The electrospray technology is combined with ionic crosslinking, the size and morphology of the microspheres are accurately controlled, the antibacterial effect on escherichia coli and staphylococcus aureus is remarkable, the in-vitro blood coagulation time is shortened by 30%, the cytotoxicity is low, and good biocompatibility is achieved.