40 results about "Saturated aqueous solution" patented technology

The application discloses TiO2-Fe2O3 ordered hierarchical structure nanorod arrays, a preparation method and application thereof, and belongs to the field of materials and environmental protection technology. A rutile TiO2 film is mixed with a precursor I, a first-time hydrothermal growth reaction obtains TiO2 primary nanorod arrays, the TiO2 primary nanorod arrays are mixed with a precursor II, a second-time hydrothermal growth reaction is carried out, drying and annealing are carried out, and the TiO2-Fe2O3 ordered hierarchical structure nanorod arrays are obtained. The precursor I is a NaCl saturated aqueous solution of TiCl3. The precursor II is a NaNO3 saturated aqueous solution of FeCl3. The TiO2-Fe2O3 ordered hierarchical structure nanorod arrays have good research potential in the application promotion in the field of actual wastewater advanced treatment and practical application prospects under sunlight.

The invention discloses a method for separating high-purity chlorogenic acid and neochlorogenic acid from a stevia rebaudiana chlorogenic acid product based on membrane coupling extraction crystallization. The method comprises the following steps: preparing a first to-be-treated solution by taking the stevia rebaudiana chlorogenic acid product as a raw material; treating the first to-be-treated liquid through an ultrafiltration membrane and a nanofiltration membrane in sequence to obtain a trapped fluid II, concentrating the trapped fluid II, and adjusting the pH value to obtain a second to-be-treated liquid; extracting the second to-be-treated liquid with an ethyl acetate-n-butyl alcohol saturated aqueous solution to obtain a raffinate phase I and an extract phase I; adjusting the pH of the raffinate phase I to obtain a third to-be-treated solution; extracting the third to-be-treated liquid with an ethyl acetate-n-butyl alcohol saturated aqueous solution to obtain a raffinate phase II and an extract phase II; drying the extract phase I, crystallizing, pulping and purifying to obtain high-purity chlorogenic acid; and drying the extract phase II, crystallizing, pulping and purifying to obtain the high-purity neochlorogenic acid. According to the method, membrane separation, solvent extraction and fractional crystallization are coupled, and high-efficiency and high-selectivity separation and purification of chlorogenic acid and neochlorogenic acid in a stevia rebaudiana chlorogenic acid product are realized.

The application discloses a method for detecting the concentration of dissolved CO in fermentation liquor. The method comprises the following steps: (1) preparing CO saturated aqueous solution, oxygen-free aqueous solution, sodium hydrosulfite solution as a reference solution and deoxygenated myoglobin solution; (2) preparing an absorbance-CO saturation standard curve; (3) sampling and detection: taking a sample from the fermentation liquor as a sample to be detected by a sampling device, injecting the sample to be detected into a cuvette, adding 2.5 mL of deoxygenated myoglobin solution in the cuvette in advance and sealing the cuvette, adjusting zero with the reference solution, detecting the absorbance of the cuvette containing the sample to be detected at a wavelength of 415-425 nm by a spectrophotometer, substituting the obtained absorbance into the absorbance-CO saturation standard curve obtained in step (2) to obtain the corresponding CO saturation, and then converting the CO saturation into the concentration of dissolved CO according to the known CO solubility. The detection method has the characteristics of taking and measuring immediately, rapidness and simplicity.

The application discloses a new method for synthesizing dihydrogibberellin without protecting carboxyl. The application provides a new method for synthesizing dihydrogibberellin without protecting carboxyl, which comprises the following steps: 1) mixing a compound shown in formula II with a catalyst A in an organic solvent B, and carrying out a hydrogen reduction reaction under a hydrogen atmosphere to obtain a compound shown in formula III; 2) mixing the compound shown in formula III with a saturated aqueous solution of a base in an organic solvent C, and carrying out a selective deacetylation reaction to obtain a compound shown in formula IV; and 3) mixing the compound shown in formula IV with triphenyl phosphine and an elimination reagent in an organic solvent D, and carrying out a dehydration elimination reaction to obtain dihydrogibberellin shown in formula V. The application can simplify the synthesis method of dihydrogibberellin and is more beneficial to large-scale production and synthesis.

The invention relates to a production method and device for preparing ammonium / alkali through a microreactor, and belongs to the technical field of safety, environmental protection, energy conservation and water conservation. The method comprises the following steps: simultaneously feeding a saturated aqueous solution of sodium chloride and a sodium bicarbonate solution into a mixing zone for premixing, and feeding into a reaction zone for reaction through shunting to obtain a reaction mixed solution; crystallizing, filtering, washing and drying the reaction mixed solution to obtain sodium bicarbonate; performing crystallization, chemical sublimation, precipitation and recrystallization on the mother liquor obtained by filtering to obtain ammonium chloride, and recovering ammonia gas generated in the crystallization, chemical sublimation, precipitation and recrystallization processes of the mother liquor; calcining the sodium bicarbonate to obtain sodium carbonate, and recovering carbon dioxide released in the calcining process; the recovered ammonia gas, carbon dioxide and water are prepared into a sodium bicarbonate solution to be used as a reaction base solution. According to the invention, liquid-gas reaction is improved into liquid-liquid reaction, and the microreactors connected in series and in parallel are improved, so that the yield and purity of the product are improved.

The invention relates to a synthesis method of oxazole carboxylic acid. The synthesis method comprises the following steps: (1) sequentially adding oxazole, AlCl3 and KI into a reaction kettle, adding a solvent, and uniformly stirring; then adding an auxiliary catalyst, introducing nitrogen to replace air, heating to 140-150 DEG C, introducing CO2, keeping the pressure at 0.4-0.6 MPa, and carrying out heat preservation reaction for 6 hours; and (2) after the reaction is finished, cooling the reaction liquid to room temperature, and filtering. Slowly pouring the filtrate into ice water while stirring, and stirring for 30 minutes to separate out a solid; adding water into a filter cake, dissolving the filter cake in a sodium hydroxide saturated aqueous solution, adjusting the pH value to be 2-3 by concentrated hydrochloric acid, filtering, and drying a solid to obtain oxazole-2-carboxylic acid.

The embodiment of the invention provides a hydrophobic horizontal plate type low-temperature solid adsorption material and a preparation method thereof, and the preparation method comprises the following steps: weighing potassium carbonate with a first preset mass, adding the potassium carbonate into deionized water, and completely dissolving the potassium carbonate to obtain a potassium carbonate saturated aqueous solution; sequentially adding a second preset mass of aggregate carrier, a third preset mass of alkaline aluminum sol and a fourth preset mass of polytetrafluoroethylene pellets into the potassium carbonate saturated aqueous solution to form mud with fluidity; the pug is evenly laid on the surface of a metal net, pressing is conducted under preset pressure, and a flat plate blank is formed; the mass of the flat plate blank is constant through drying; and calcining and curing the flat plate blank with constant mass to obtain the hydrophobic flat plate type low-temperature solid adsorption material. The device has high CO2 adsorption capacity, excellent hydrophobicity and mechanical stability, the low-temperature applicability of the device remarkably reduces industrial carbon capture energy consumption, and a flat plate type design is adapted to a modular device.

The invention discloses a method for detecting aflatoxin in silkworm chrysalis meal. According to the invention, a salting-out auxiliary liquid-liquid extraction technology and a supramolecular solvent extraction technology are integrated and are executed by an automatic salting-out extraction device specially designed for a pretreatment process, so that a system and a scheme for detecting aflatoxin in silkworm chrysalis meal, which integrate a special device, a core reagent and a detection method, are provided; a detection method which is green, environment-friendly, rapid, efficient, low in cost, high in sensitivity and good in accuracy is established. The preparation method comprises the following specific steps: preparing a supermolecular solvent consisting of n-heptanol, tetrahydrofuran and water and a saturated aqueous solution; the method comprises the following steps: mixing a silkworm chrysalis meal sample with a supramolecular solvent and ammonium sulfate, and carrying out vortex, centrifugation, constant volume and filtration to obtain a test solution; and carrying out quantitative analysis by adopting a matrix matching standard curve. The method is simple and convenient to operate, low in organic solvent consumption and low in cost, and is suitable for high-throughput rapid screening and quantitative detection of trace aflatoxin in silkworm chrysalis meal.

The invention discloses a preparation method of an L-isoleucine spherical crystal, which comprises the following steps: adding an additive into an L-isoleucine saturated aqueous solution, keeping the temperature at 75-80 DEG C for 30-60 minutes, and then carrying out reduced pressure evaporative crystallization to obtain the L-isoleucine spherical crystal, the additive comprises any one or a combination of at least two of L-amino acid, substituted or unsubstituted C1-C3 alkyl cellulose and substituted or unsubstituted C1-C3 alkyl cellulose salt; the substituted substituent is hydroxyl and / or carboxyl. According to the preparation method, the L-isoleucine spherical crystal is prepared through cooperation of an additive and reduced pressure evaporation crystallization, and the spherical crystal product is good in sphericity degree, uniform in particle, good in fluidity and high in tap density; the preparation method is simple and easy to control, high in yield, green and environment-friendly, and convenient for industrial large-scale production and application.

The invention discloses a method for simultaneously preparing high-content isochlorogenic acid A and high-content isochlorogenic acid C. The method comprises the following steps: dissolving a stevia rebaudiana polyphenol product in purified water, and adjusting the pH value to obtain a treating fluid 1; adsorbing the treating fluid 1 through macroporous adsorption resin, jacking the treating fluid 1 through purified water, and mixing effluent liquid during adsorption and purified water jacking to obtain effluent liquid 1; concentrating the effluent 1 by using a reverse osmosis membrane, adjusting the pH value to obtain a treating fluid 2, and extracting the treating fluid 2 by using an ethyl acetate saturated aqueous solution to obtain a raffinate phase I and an extract phase I; adjusting the pH value of the raffinate phase I, and extracting with an ethyl acetate-n-butyl alcohol saturated aqueous solution to obtain a raffinate phase II and an extract phase II; after drying the extract phase I, sequentially crystallizing and recrystallizing to obtain high-purity isochlorogenic acid C; and drying the extract phase II, and sequentially crystallizing, pulping and purifying to obtain the high-purity isochlorogenic acid A. The method comprises the following steps: removing impurities by adopting macroporous adsorption resin, extracting by adopting a solvent step by step, carrying out crude separation on the isochlorogenic acid A and the isochlorogenic acid C, and carrying out subsequent crystallization and refining to obtain the high-content isochlorogenic acid A and the high-content isochlorogenic acid C.

The invention relates to a preparation method of bis (4-tert-butylphenyl) iodine hexafluorophosphate, and belongs to the technical field of photoinitiators. According to the method, reaction conditions are optimized according to the reaction principle of free radical chain initiation and chain growth, in the step (1), by adjusting the adding mode of an oxidizing agent, the oxidizing agent accounting for 38.46%-45.45% of the molar mass of the whole oxidizing agent is added into a container and stirred to be uniform, the reaction is carried out for 40 min or above, then the remaining oxidizing agent is prepared into a saturated aqueous solution to be added, and the reaction is carried out for 30 min or above; the reaction lasts for 2-3 days, the reaction efficiency of free radicals in the reaction is greatly increased, the reaction yield can be increased to 90% or above, and the requirement of large-batch production can be met.

This invention provides a macrocyclic crosslinked anion exchange membrane constructed using host-guest recognition, its preparation method, and its application. First, a large-volume rigid crosslinking agent, CDIC, is synthesized by using a saturated aqueous solution method to include nonpolar molecules via the host-guest molecular recognition of β-cyclodextrin. Second, a membrane-forming material is prepared by first chloromethylating the polymer and then functionalizing it. Finally, CDIC is introduced into the membrane-forming material to promote the formation of microphase separation structures within the membrane, resulting in a macrocyclic crosslinked anion exchange membrane. The anion exchange membrane synthesized by this invention can be applied in the field of electrodialysis water treatment. The preparation process is simple, the raw materials are inexpensive and readily available, and the resulting anion exchange membrane exhibits suitable water absorption and optimal microphase separation structures at a relatively low charged group density, thereby effectively improving the selectivity and ion transport flux of the anion exchange membrane and providing a new preparation strategy for electrodialysis water treatment devices.

Slurries and methods of making slurries for modifying and extending relative humidity control ranges. The slurries may include a saturated aqueous salt and one or more other reagents selected to provide a controlled modifiable narrow range of relative humidity. The saturated aqueous salt may be one or more of sodium chloride, potassium chloride, potassium citrate, sodium formate, and / or magnesium chloride, and the one or more other reagents may be one or more of a lactate salt, glycerol, and / or an acetate salt, for example.

Provided is a potassium nitrate production method that makes it possible to effectively utilize waste which has been discharged from a cement plant, so as to obtain potassium nitrate easily and highly efficiently, said method comprising: a step for extracting potassium chloride from chlorine bypass dust discharged from the cement plant by bringing the chlorine bypass dust into contact with a saturated aqueous solution of potassium chloride at room temperature; a step for bringing the potassium chloride obtained in the step for extracting the potassium chloride into contact with nitric acid obtained from nitrogen oxides contained in combustion exhaust gas discharged from the cement plant; and a step for obtaining potassium nitrate by heating, at 75-175°C, a fluid obtained in the contacting step. Also provided is a system for treating waste which has been discharged from the cement plant.

The application discloses a motor lubricating grease composition, which comprises a thickening agent, base oil and an additive, and specifically, the thickening agent is 10-15%, the base oil is 85-90%, and the sum of the mass percentages of the two is 100%; the additive is additionally added in a proportion of 1-5%; the thickening agent is composed of mixture A and mixture B; a) the mixture A is a reactant of dodecahydroxy stearic acid, organic dibasic acid and saturated aqueous solution of lithium hydroxide monohydrate, and the molar ratio of the dodecahydroxy stearic acid to the organic dibasic acid is 1:0.1-1; b) the mixture B is an amide compound, and the amide compound is a mixture of one or more of dodecanamide, hexadecanamide, octadecanamide, octadecenoic acid amide, docosanamide, docosenoic acid amide, N,N-dimethyl dodecanamide and N,N'-ethylene bis-stearamide in an arbitrary ratio. The application can effectively prolong the service life of the lubricating grease, prolong the grease replenishing period and prolong the service life of the motor.

A process for removing biuret for solid urea (UR), wherein the solid urea is in a granular or powder form, the process including leaching the solid urea with a leaching solution (LS) which is a urea saturated aqueous solution, wherein biuret contained in the solid urea is transferred to said leaching solution during the leaching process, obtaining a purified solid urea.

The application provides a chromone-modified o-phenanthroline polypyridine Ru(II) series compound and a preparation method and application thereof, the preparation method synthesizes an intermediate A by taking 1,10-o-phenanthroline-5,6-diketone and 6-substituted-4-oxo-4H-benzopyran-3-formaldehyde as raw materials, then the intermediate A is heated to reflux in ethylene glycol solvent and cis-[Ru(2,2'-dipyridine)2Cl2]·2H2O at 120 DEG C for 6h, after the system is cooled to room temperature, an excess amount of a saturated aqueous solution of potassium hexafluorophosphate is added, after a precipitate is separated out, the filter cake is washed with clean water, and the final product is obtained after drying. The synthesis method is simple and easy to operate without steps such as column chromatography.

The application discloses a kind of porous structure's hollow glass microsphere precursor microparticle preparation and application, comprising: mixing silica sol with water, then under magnetic stirring, add water glass, obtain mixed solution;Metal acetate and boric acid are dissolved into saturated aqueous solution, under magnetic stirring, add to mixed solution, with acetic acid adjustment pH, obtain white emulsion, after stirring by homogenizer, carry out spray drying, obtain porous structure's hollow glass microsphere precursor microparticle.The microporous of porous structure's hollow glass microsphere precursor microparticle inside has been replaced with the bubble nucleation process of microparticle in the process of foaming into ball in the process of foaming into ball, shorten foaming into ball time, eliminate the bubble that ball wall is not coalesced, reduce the particle of incomplete foaming, improve the yield and performance of hollow glass microsphere.The application uses crosslinking incomplete silica sol as raw material, with chemical bonding replaces the traditional soft chemical method preparation microparticle's cohesive aggregation, enhances the pressure strength of precursor microparticle.

The application provides a metallographic structure display method of a gold-based alloy, and the display method comprises the following steps: taking the gold-based alloy as an anode, electrolytic immersion etching the gold-based alloy in an electrolyte composed of hydrochloric acid, nitric acid and anhydrous ethanol, then cleaning the surface of the obtained gold-based alloy to obtain the gold-based alloy after electrolytic immersion etching; soaking the gold-based alloy after electrolytic immersion etching in ammonia water, then cleaning the surface of the obtained gold-based alloy, and obtaining the gold-based alloy after preliminary treatment after the surface is dried; immersing the gold-based alloy after preliminary treatment in a corrosion liquid composed of a saturated aqueous solution of chromium trioxide, hydrochloric acid and distilled water, then cleaning the surface of the obtained gold-based alloy, and completing the display of the metallographic structure of the gold-based alloy after the surface is dried, which greatly facilitates the observation of the metallographic structure of the gold-based alloy and is beneficial to obtaining the gold-based alloy product meeting the performance requirements.

The present application relates to the field of fragrance technology, and is especially a Boju fragrance and a preparation method thereof, which is prepared from the following raw materials in percentage by weight: Boju characteristic fragrance base 5-15%, auxiliary floral fragrance base 2-8%, fragrance fixing and releasing system 3-10%, 95% volume concentration ethanol 55-70%, deionized water 10-25%, soothing agent 0.5-2%, and antioxidant 0.1-0.5%. The fragrance fixing and releasing system is composed of a molecular fragrance fixative and microencapsulated Boju fragrance essence, and the microencapsulated Boju fragrance essence is obtained by embedding part of the Boju characteristic fragrance base with β-cyclodextrin as wall material. The Boju fragrance obtained by the present application has good oxidation stability, and has no obvious color change when sealed and placed in the dark at 40℃±2℃ for 28 days. Moreover, the Boju fragrance has improved fragrance retention time, naturalness of fragrance and soothing degree. By controlling the embedding amount of the Boju characteristic fragrance base in the Boju fragrance and the ratio of the embedding amount to the saturated aqueous solution of β-cyclodextrin, the fragrance persistence of the Boju fragrance is improved.

The invention discloses an acyl-containing quaternary ammonium salt compound, a phosphorite reverse flotation collector and a reverse flotation method.The preparation method of the acyl-containing quaternary ammonium salt compound comprises the following steps that fatty acyl chloride is added into an organic solution of N, N-dimethyl-1, 4-butanediamine, a reaction is conducted under the ice bath condition, after the reaction is finished, a saturated NaHCO3 aqueous solution is used for washing, liquid separation is conducted, and the acyl-containing quaternary ammonium salt compound is obtained; drying the obtained organic phase and removing the solvent to obtain an intermediate; and dissolving the intermediate in ethyl acetate, mixing with halogenated ethane, carrying out a stirring reflux reaction in a nitrogen atmosphere at 40-60 DEG C, and after the reaction is finished, filtering and washing to obtain the acyl-containing quaternary ammonium salt compound. The acyl-containing quaternary ammonium salt compound prepared through the method serves as a phosphorite reverse flotation desilicication collecting agent and is combined with a magnesium removal collecting agent, magnesium removal, desilicication and potassium and sodium feldspar removal can be efficiently achieved, the process is simplified, water is saved, consumption is reduced, and the acyl-containing quaternary ammonium salt compound has wide application prospects.

This invention discloses the preparation and application of core-shell structured hollow glass microsphere precursor particles, comprising: mixing water glass with water, then removing sodium ions with a cation exchange resin to obtain a silicate aqueous solution; dissolving metal nitrate and boric acid into a saturated aqueous solution, adding it to the silicate aqueous solution under magnetic stirring to obtain a uniformly doped transparent mixed solution, and spray drying to obtain core-shell structured hollow glass microsphere precursor particles. This invention pre-forms relatively large pores within the precursor particles to obtain core-shell structured hollow glass microsphere precursor particles, which can effectively shorten the foaming and spheroidizing time, reduce incompletely foamed particles, and improve the yield and performance of hollow glass microspheres. This invention uses molecular-level water glass as the main raw material, completing part of the silicate formation and cross-linking reaction during the process, replacing the bonding and aggregation of particles prepared by traditional soft chemical methods with chemical bonding, thus enhancing the compressive strength of the precursor particles.

The application discloses an ionic liquid / eutectic solvent@cyclodextrin-derivative cellulose double-layer tablet and a preparation method thereof; the cyclodextrin is beta-cyclodextrin, the ionic liquid is 1-amine ethyl-3-methyl imidazole bromide, the eutectic solvent is composed of choline chloride as a hydrogen bond acceptor and acetic acid as a hydrogen bond donor, and derivative cellulose including ethyl cellulose is used as a diluent / binder. The application first prepares two kinds of inclusion compounds of ionic liquid@cyclodextrin and eutectic solvent@cyclodextrin through a saturated aqueous solution method, then uniformly mixes the two kinds of inclusion compounds with derivative cellulose respectively, and finally adopts a tablet pressing method to prepare a composite double-layer tablet. The preparation process is simple, the conditions are mild, the process is easy to popularize, and the process is suitable for large-scale production. The ionic liquid and the eutectic solvent are solidized by forming inclusion compounds with the cyclodextrin, and the state is stable. The obtained composite tablet has ideal hardness, different layers can play selective adsorption effects, and has ideal environmental friendliness and recycling properties.

The invention relates to a lung-targeted drug-loaded micromotor as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing mPEG (Polyethylene Glycol), N-t-Boc-glycine, DMAP (Dimethylaminopyridine), DCC (Dendritic Cellulose) and a solvent for reaction, and sequentially obtaining an intermediate product preparation process of mPEG-CH2CH2NH-Boc, CH3OPEG-NH2 and mPEG-NH2; performing mixed reaction on NHS, EDC and a sodium alginate solution in a buffer system to obtain a carboxyl activation process of an activated product; the mPEG-NH2 and the activated product are mixed and subjected to a reaction, and a precursor material of Alg-g-mPEG is obtained; a saturated alpha-CD aqueous solution of an FOF1-ATPase molecular motor is mixed with the Alg-g-mPEG aqueous solution, and the Alg-g-mPEG self-assembled micro-capsule with the FOF1-ATPase molecular motor coating is obtained in the carrier preparation process; mixing a drug with the self-assembled micro-capsule to obtain a lung-targeted drug-loading micro-motor; the invention further discloses application of the lung-targeted drug-loaded micromotor prepared according to the preparation method in preparation of a drug delivery system for treating lung adenocarcinoma. The double-site high-drug-loading-capacity hydrogel has the advantages of being high in double-site high drug loading capacity, high in biological safety, high in pH response self-driving capacity, good in lung tumor targeting capacity, good in lung retention capacity and the like.

The application discloses a kind of porous crosslinking benzyl alcohol resin sodium salt β-H elimination accelerant and its preparation method and application, it is related to β-H elimination accelerator technical field.The technical scheme is: S1 chloromethylated polystyrene crosslinked resin is poured into sodium carbonate saturated aqueous solution and heated to boiling, stirring reaction;S2 filter removes aqueous solution, washes sodium carbonate remaining in resin microspheres with water;S3 resin microspheres are dried, add anhydrous tetrahydrofuran and sodium hydride, after warming reaction, cool to room temperature and filter polymerization ball, respectively with methanol, tetrahydrofuran and n-hexane wash polymerization ball, polymerization ball is dried, obtain porous crosslinking benzyl alcohol resin sodium salt β-H elimination accelerant.The porous crosslinking benzyl alcohol resin sodium salt β-H elimination accelerant prepared by the application has the advantages of high metal salt content, strong alkaline, easy separation, etc., and is a kind of very industrial application prospect of auxiliary agent.

The invention discloses a magnesium chloride-based low-freezing-point asphalt pavement material and a preparation method thereof, and belongs to the technical field of snow melting materials. The preparation method comprises the following steps: (1) adding powdery blast furnace slag into a saturated aqueous solution of anhydrous magnesium chloride, and mixing to form a mixture; (2) standing, filtering, drying and grinding to obtain a salt storage material; (3) mixing a dispersing agent with hydrogen-containing silicone oil to obtain a surface modifier; and (4) adding the surface modifier into the salt storage material, mixing, standing, drying, and grinding to obtain the magnesium chloride-based low-freezing-point asphalt pavement material. A wet loading mode is adopted, the preparation method has the advantages of being convenient in process and suitable for large-scale production, material preparation with magnesium chloride as a single snow melting component is achieved, the material is low in corrosivity and environmental load and has the advantages of being slow in release, long in ice melting time and good in snow melting effect, and the preparation method is suitable for industrial production. The snow melting agent has wide application prospect and high application value in the fields of road snow melting and the like.

The application provides an organic copper ion complex antifouling agent and a preparation method thereof. The complex takes o-phenanthroline and imidazole monomers as main ligands, 1,10-phenanthroline as an auxiliary ligand, and forms an organic metal complex with copper ions. 1,10-phenanthroline and CuCl2 are added into 50-70 ml of a solvent in a reaction bottle, the ratio of 1,10-phenanthroline to CuCl2 is 1:1-1.5, the reaction temperature is controlled at 80-110 DEG C, the heating time is controlled at 2-3 h, then 1-1.4 mol of o-phenanthroline and imidazole monomers are added and stirring is continued for 2-3 h, after the reaction, cooling to room temperature, pouring into saturated NaClO4 aqueous solution, stirring for 20-40 min, collecting the precipitate by filtration, washing, drying in a vacuum drying oven, and recrystallizing in methanol. The organic copper ion complex antifouling agent can improve the antifouling performance of a coating, especially the antifouling performance on algae, and prolong the service life of the coating. The organic copper ion complex antifouling agent can be applied to the surface antifouling coating of marine engineering equipment and facilities such as marine ships, nuclear power platforms and oil production platforms, and can prevent and remove biological fouling.

The invention discloses a high-concentricity hemostatic gel plug and a preparation method thereof. According to the preparation method, the hollow annular columnar framework with a uniform structure is constructed through inorganic salt particle accumulation and saturated aqueous solution bridging technologies, so that the problem of eccentricity caused by a traditional curling process is fundamentally solved. According to the skeleton forming mode, a regular gap structure formed by compact arrangement of particles is utilized, an accurate template is provided for subsequent uniform filling of a PEG solution, the gel plug obtained by removing inorganic salt through dissolution after curing has highly consistent radial size, it is ensured that the gel plug can be accurately matched with the shape of a puncture channel when the puncture channel is plugged, and the puncture effect is improved. And the problem of untight plugging caused by eccentricity is avoided. Meanwhile, the whole preparation process is completed in a closed container, interference of the external environment to the forming precision is reduced, the consistency of products in batches is remarkably improved, and the blood sucking rate of the material is greatly improved through a three-dimensional intercommunicated gap network formed in the preparation process.