157results about How to "No precipitation" patented technology

The invention relates to the technical field of etching solutions, in particular to the field of IPC C23F, and more particularly relates to a double-agent copper-molybdenum-titanium etching solution and a preparation method thereof. Comprising a main agent and an auxiliary agent, and the main agent comprises the following components in parts by weight: 8-15 parts of an oxidizing agent, 4-13 parts of first organic acid, 1-3 parts of first inorganic acid, 1-3 parts of first organic alkali, 1-4 parts of a first surfactant, 0.05-0.5 part of a first fluorine-containing compound, 0.01-1 part of a first corrosion inhibitor and 60-80 parts of water; and the auxiliary agent comprises the following components: 10-60 parts of second organic acid, 2-10 parts of second inorganic acid, 1-5 parts of second organic alkali, 0.05-0.5 part of a second fluorine-containing compound, 1-5 parts of a second surfactant, 0.5-2 parts of a second corrosion inhibitor and 50-80 parts of water. The problems of large etching rate fluctuation, chamfering, vertical angle, precipitation, crystallization and the like in the etching process of the etching liquid are solved.

The invention provides a florfenicol solution for veterinary use as well as a preparation method and application of the florfenicol solution for veterinary use. The mass percent of the florfenicol is 20%-35%, the mass percent of the inclusion agent is 6%-15%, the mass percent of the cosolvent is 5%-10%, the mass percent of the solubilizer is 10%-15%, the mass percent of the wetting agent is 0.05%-0.2%, the mass percent of the pH regulator is 0.8%-1.5%, the mass percent of the antioxidant is 0.8%-2.5%, and the mass percent of the flavoring agent is 1.0%-5.0%. The veterinary florfenicol solution disclosed by the invention is simple in preparation process, relatively good in solubility of florfenicol, clear in solution and free from precipitation after being placed for a long time. Test results show that the veterinary florfenicol solution has a remarkable treatment effect on chicken colibacillosis, and can effectively control symptoms of swine enzootic pneumonia and improve the mental state and the respiratory rate.

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

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

The invention discloses a steel billet anti-oxidation coating material, a preparation method and steel, the steel billet anti-oxidation coating material is characterized in that the steel billet anti-oxidation coating material comprises steel slag powder, ceramic powder and a high-temperature-resistant adhesive, and the ceramic powder comprises aluminum oxide powder, zirconium oxide powder, magnesium oxide powder, silicon oxide powder, calcium oxide powder and titanium oxide powder; wherein the mass ratio of the steel slag powder to the ceramic powder is 1: (1.6-1.8); based on the steel billet anti-oxidation coating material, the weight percentage of the high-temperature-resistant adhesive is 20-35%. The steel billet anti-oxidation coating material is scientific and reasonable in proportioning, the steel billet is coated with the steel billet anti-oxidation coating material, the use requirement for spraying at the high temperature is met, the special requirements for coating compactness, high temperature resistance, oxidation resistance and other performance of steel at the temperature not exceeding 1300 DEG C are met, and an anti-oxidation coating formed on the surface of a steel ingot or the steel billet does not crack.

This invention discloses a highly filled modified PP masterbatch and its preparation method, belonging to the field of polymer material modification technology. The masterbatch, by weight, consists of the following components: 25-30 parts polypropylene, 60-65 parts heavy calcium carbonate, 2-3 parts compatibilizer, 1-2 parts toughening agent, 0.3-0.5 parts compounded antioxidant, 0.5-1.0 parts lubricant, and 0.2-0.3 parts dispersant. This invention achieves a high-filling system with ≥60% calcium carbonate filling through synergistic optimization of the raw material formulation and precise control of the preparation process. This effectively solves the industry pain points of traditional highly filled modified PP masterbatches, such as filler agglomeration, precipitous decline in mechanical properties, and poor processing stability. The finished masterbatch meets national and industry acceptance standards for industrial equipment shells, automotive interior and exterior trim, and functional parts. The raw material cost is reduced by 15-25% compared to traditional modified PP masterbatches. The preparation process of this invention is simple and can achieve stable mass production using existing general-purpose modification equipment. The product qualification rate is ≥98%, demonstrating excellent economic benefits and broad application prospects.

The invention relates to the technical field of printing ink, and discloses a preparation method of a water-borne epoxy resin binder and application of the water-borne epoxy resin binder in printing ink, water and nano titanium dioxide are added into a container, modified silicone oil is added after ultrasonic treatment, stirring and dispersing are carried out, then water-borne epoxy resin, a defoaming agent, a flatting agent and a thickening agent are added, stirring and uniform mixing are carried out, and the water-borne epoxy resin binder is obtained. The waterborne epoxy resin binder is obtained. The catechol structure of the modified silicone oil can be coordinated with the surface of the nano titanium dioxide, so that the surface coating modification of the nano titanium dioxide is realized, the agglomeration of the nano titanium dioxide is reduced, the dispersity of the nano titanium dioxide in a water-borne epoxy resin connecting material is improved, and the emulsion is free of precipitation and layering and very good in storage stability. The imino group contained in the modified silicone oil can be subjected to a curing reaction with the epoxy resin, so that a very good toughening effect is achieved, and meanwhile, the heat resistance and flame retardance of the epoxy resin are improved.

The invention discloses a wild fruit acid soup sauce and a preparation technology thereof, and belongs to the technical field of food processing. The wild fruit soup sauce is composed of a wild fruit base sauce and a sour soup base bag, the wild fruit base sauce is prepared by compounding and pulping tomatoes, tree tomatoes, haws, tamarind fruits / olives, lemons and papayas, and passion fruits are added for aroma enhancement when the wild fruit soup sauce is eaten; the sour soup base bag is prepared by taking monosodium glutamate, chicken essence, pungent litse fruit, chili powder and the like as raw materials, frying the raw materials at 150 DEG C and boiling the raw materials for more than 20 minutes. The flavor level is improved through natural wild fruit compounding, a standardized stir-frying process guarantees mellow taste and high stability, the sauce is convenient to use and long in shelf life, the problems that traditional sour soup is single in flavor, tedious in operation and uneven in quality are solved, and the method is suitable for catering and making of various sour soup dishes in families.

This invention relates to the field of heavy metal contaminated water or soil remediation technology, and discloses the application of magnesium-based cementitious materials in heavy metal ion remediation in ultra-stable mineralized environments. This invention can achieve good heavy metal adsorption effects in a short time, without the release of toxic substances or secondary pollution, and is suitable for the remediation of heavy metal contaminated water or soil.

This invention provides a high-hygroscopic, water-free composite gel-type calcium and magnesium salt tablet and its preparation method, which is made from the following raw materials in parts by weight: 45-70 parts calcium and magnesium salt, 15-25 parts gum arabic, 3-15 parts mica powder, 2-12 parts polyethylene oxide, 0.5-2 parts sodium nitrite, and 2-30 parts gelatin. This tablet exhibits high hygroscopicity and excellent physical properties.

The invention discloses a polygonatum sibiricum functional liquid beverage and a preparation method thereof, and belongs to the technical field of development of green healthy functional beverage products. The polygonatum sibiricum functional liquid beverage comprises the following raw materials in parts by mass: 30-46 parts of a polygonatum sibiricum extracting solution, 4-10 parts of polygonatum sibiricum steaming water and 50-60 parts of purified water. Functional components of rhizoma polygonati are fully utilized, the process is optimized, so that the content of low-molecular-weight glycans is increased, a novel functional product is developed in the form of a beverage through comprehensive combination of the extracting solution and rhizoma polygonati steaming water, and economic and environmental values are achieved.

The invention discloses an NHDC / cyclodextrin / pyruvic acid ternary liquid supramolecular self-assembly system and a preparation method thereof, and belongs to the technical field of supramolecules. The invention provides a new methyl hesperidin dihydrochalcone / cyclodextrin / pyruvic acid ternary liquid supramolecular self-assembly system and a preparation method thereof by selecting molecules compatible with new methyl hesperidin dihydrochalcone, the types of the compatible molecules and the addition amount. The neohesperidin dihydrochalcone / cyclodextrin / pyruvic acid system obtained through supramolecular self-assembly is in a stable liquid state and can be mixed and dissolved with water in a specific proportion without precipitation, and the water solubility, stability, oxidation resistance and antibacterial property of neohesperidin dihydrochalcone are effectively improved.

The invention relates to a modified thickening agent and a gelled acid system containing the same, and belongs to the field of oilfield chemical assistants.The modified thickening agent is prepared through the following steps that acrylamide, 2-acrylamido-2-methylpropanesulfonic acid, deionized water, kerosene, a first emulsifier and an initiator are subjected to a heating reaction, and a polymer A is obtained; acrylamide, N, N '-dimethylacrylamide, deionized water, kerosene, a second emulsifier and an initiator are subjected to a heating reaction, and a polymer B is obtained; acrylamide, N-(2-(allylbromo)-2-phenethyl) heptanamide, deionized water, kerosene, a third emulsifier and an initiator are subjected to a heating reaction, and a polymer C is obtained; a polymer A, a polymer B, a polymer C and an initiator are stirred to react to obtain a polymer D, and the polymer D is post-treated to obtain the modified thickening agent. Compared with a conventional slick water system, the gelled acid body formed by compatibility of the modified thickening agent can realize self-gel breaking without adding a gel breaker, and after gel breaking, no micelles exist, and the residue content is low.

The invention discloses a low-free-formaldehyde sodium glutamate-based gypsum retarder as well as a preparation method and application thereof, and belongs to the technical field of building material admixtures. The preparation method comprises the following steps: by taking sodium glutamate and formaldehyde as raw materials, carrying out an addition reaction at low temperature under a weakly alkaline condition regulated by calcium hydroxide to generate an intermediate; and then heating under an acidic condition to carry out dehydration polycondensation, and neutralizing by negative pressure and lime milk to prepare the sodium glutamate-formaldehyde condensation compound. The invention also discloses a retarder composition containing the condensate and a phosphate / zinc sulfate mixture. According to the invention, the content of free formaldehyde (1t; 300 mg / kg) is obviously reduced through improvement; the problem that the strength of gypsum is reduced due to a traditional retarder is solved by using the chelation of calcium ions and zinc sulfate.

The invention discloses a method for separating and extracting tea polyphenol by a membrane method. The method comprises the following steps: S1, taking crude tea leaves and deionized water; s2, extracting the crude tea leaves with deionized water; s3, merging the extracted leaching solutions, and filtering the merged leaching solutions by using a 150-mesh plate and frame filter; s4, reducing the temperature of the filtrate to 35 DEG C or below; s5, adding the filtrate into an ultrafiltration membrane system for filtering; s6, the ultrafiltration filtrate enters a nanofiltration membrane system to be separated, so that soluble salts are removed; s7, concentration treatment; and S8, drying treatment. According to the method for separating and extracting tea polyphenol through the membrane method, clarification, purification and concentration of tea juice are achieved, the defect of high-temperature concentration can be effectively avoided, the obtained product is excellent in fragrance, color and taste, the content of effective components of the product is obviously increased, solvent residues are avoided, and the water solubility is good; and in the application process, the phenomenon that polyphenols, water-soluble proteins and the like are complexed to form flocculent precipitates is avoided.

The embodiment of the invention relates to a method for forming an artificial SEI membrane through chemical passivation of a pre-lithiated negative electrode of an aqueous battery and application. The method comprises the following steps: performing chemical pre-lithiation on an aqueous battery cathode active substance A or a cathode pole piece containing the cathode active substance A in a lithium supplement agent, so that the cathode active substance A is converted into a lithium-intercalated cathode active substance LiXA; placing the lithium-intercalated negative electrode active material LiXA or a negative electrode plate containing the lithium-intercalated negative electrode active material LiXA in the air for standing, forming an artificial solid electrolyte interface SEI membrane by utilizing self-discharge of the lithium-intercalated negative electrode active material LiXA, and reducing the negative electrode active material A at the same time; the process of forming the solid electrolyte interface SEI through self discharge comprises one, two or all of # imgabs 0 # imgabs 1 # 4LixA + 2xCO2 + xO2-> 2xLi2CO3 + 4A and # imgabs 2 # 2LixA + 2xH2O-> xH2 + 2xLiOH + 2A.

The invention relates to the technical field of plant growth regulation, in particular to the field of IPC A01N 37, and more particularly relates to a suspending agent containing mepiquat chloride. Prohexadione calcium as well as preparation and application of the suspending agent. The water-soluble suspending agent comprises the following components in percentage by weight: 5-20% of prohexadione calcium, 1-8% of mepiquat chloride, 3-10% of a dispersing agent, 1-6% of a synergist, 4-10% of an anti-freezing agent, 0.5-3% of a thickening agent, 0.5-3% of an auxiliary agent and the balance of reverse osmosis water. The formula product has relatively strong surface wetting power and can keep a good wetting effect, so that the liquid medicine is easy to spread on the surface of a leaf, the loss of the liquid medicine is reduced, and the pesticide effect is exerted; accelerated heat storage test, cold storage test and freeze thawing test show that the formula sample has excellent stability, and each index is basically unchanged before and after heat storage.

The present invention provides a preparation method and application of sea cucumber peptides, belonging to the field of marine biotechnology. The present invention improves the extraction process of sea cucumber peptides, and adopts a method of biological enzymatic hydrolysis plus low-temperature vacuum cooking, which can not only effectively reduce the loss of heat-sensitive vitamins, polysaccharides, and trace elements, and keep the nutritional components of sea cucumbers as much as possible, but more importantly, it can make the sea cucumber peptides have a better flavor. As the cooking temperature decreases, the protein and fat denaturation in the peptide powder is also reduced to a certain extent, which can reduce the flocculation precipitation caused by protein denaturation and the poor sensory perception caused by lipid denaturation of the peptide powder during the product utilization period; finally, it can also improve the extraction rate of sea cucumber peptides, reduce heat energy consumption, and reduce processing costs. It has been proven that the marine active peptide energy drink based on sea cucumber peptides has good flavor, stable shelf life and no precipitation, and is suitable for wide application in beverage products.

The invention provides an eleczyme sustained-release dry suspension, which comprises the following components in percentage by mass: 10% to 30% of eleczyme, 30% to 60% of a sustained-release carrier, 10% to 57% of a filler, 1% to 5% of a suspending agent, 1% to 4% of a pH regulator, 0.2% to 1% of a flavoring agent, and 0.2% to 1% of an aromatic flavoring agent; wherein the sustained-release carrier is selected from one or both of stearic acid and glyceryl monostearate; and the suspending agent is selected from one or more of xanthan gum, hydroxypropyl methylcellulose, sodium carboxymethylcellulose, and sodium alginate. The sustained-release dry suspension has good suspension uniformity after adding water, has no precipitation or stratification problems, has good sustained-release performance, and does not have a pungent taste.

The invention discloses a glycyrrhizic acid / panthenol binary liquid supramolecular self-assembly system and a preparation method thereof, and belongs to the field of supramolecular technology. The invention provides a glycyrrhizic acid / panthenol binary liquid supramolecular self-assembly system and a preparation method thereof, which increases the solubility and antibacterial property of glycyrrhizic acid through the supramolecular self-assembly system, and improves the stability of glycyrrhizic acid in the formula. The glycyrrhizic acid / panthenol binary liquid supramolecular self-assembly system prepared by the invention can be miscible with a specific proportion of water without precipitation, and effectively improves the water solubility, antibacterial property and stability of glycyrrhizic acid.

The invention discloses a method for purifying a toxoplasma gondii recombinant antigen, which comprises the following steps: selecting a full-length sequence of a toxoplasma gondii surface antigen SRS3, connecting the full-length sequence with a carrier through enzyme digestion to form plasmids, performing mass expression in escherichia coli, sequentially performing ultrasonication and centrifugation to collect cell supernatant, and performing deep filtration; the specific affinity chromatography column is coupled with an IgG subtype antibody obtained by hybridizing splenocytes and myeloma cells of a BALB / c mouse infected with toxoplasma gondii through a hybridoma technology. And through affinity chromatography purification, the toxoplasma gondii antigen protein with relatively high purity is finally obtained. According to the method, the toxoplasma gondii recombinant antigen can be stably and effectively purified from the cell supernatant. The method provided by the invention has the advantages of high extraction purity, simple process, capability of realizing one-step purification, stable antibody and the like, and has important significance for realizing purification of the toxoplasma gondii recombinant antigen.

This invention discloses a pellet preparation process based on fibrous bentonite slurry-enhanced pelletizing, belonging to the field of pellet preparation technology in the iron and steel industry. The process includes: wetting iron concentrate to 2.5%~3.5% moisture content; mixing with a first portion of bentonite, followed by sequential high-intensity mixing and milling to obtain pelletizing material; feeding the material into a pelletizer; after the mother pellets are prepared, atomized spraying of fibrous bentonite slurry replaces the addition of water during pelletizing, allowing the pellets to grow to qualified green pellets. The fibrous bentonite slurry is prepared by mixing a second portion of bentonite and water at a mass ratio of 1:5~20, and stirring for 4~6 minutes at a revolution speed of 120~130 r / min and a rotation speed of 280~290 r / min. This invention achieves uniform distribution of bentonite within the pellets through graded moisture control and precise spraying, reducing the total bentonite usage from 1.6% to 1.2% while ensuring pellet quality, significantly reducing bentonite consumption and achieving cost reduction, efficiency improvement, energy conservation, and emission reduction in pellet production.

The invention relates to a preparation process of a nanoscale porous membrane for purification. The preparation process comprises the following steps: (1) performing blank making, pushing and calendering on a mixture of polytetrafluoroethylene powder and solvent oil to form a base band; (2) stretching the base band according to different multiplying power to form a longitudinal stretching band; (3) carrying out strengthening treatment on polytetrafluoroethylene powder, and crushing the polytetrafluoroethylene powder into required particle sizes; (4) the reinforced and crushed polytetrafluoroethylene particles are laid between two layers or multiple layers of longitudinal pulling belts; (5) the multiple layers of longitudinal pulling belts are compounded into a layer of composite belt in a hot pressing or blanching mode; (6) the composite belt is subjected to heat treatment, creep retraction is accelerated by a certain multiplying power, and a retraction belt is formed; 7, the retraction belt is transversely stretched and shaped according to a certain multiplying power to form the nanoscale porous membrane.The polytetrafluoroethylene membrane produced through the preparation technology has the pore diameter ranging from 2 nm to 100 nm, is stable in chemical performance and free of particulate matter precipitation and is suitable for different-level purification processes of various reagents.

The present application belongs to the technical field of food processing, and specifically relates to a physical preparation method of high-resistance starch ultra-micro powder. The high-resistance starch rice with a dry basis resistance starch content of greater than or equal to 30% is used as raw material, and a pure physical processing route is adopted. The rice is first made crisp through twice low-temperature baking at 100-120 DEG C, and the structure of the resistance starch is stabilized at the same time. Then, after coarse crushing, the rice is sent into an airflow pulverizer, and wind-driven ultra-micro grinding is carried out in a low-temperature environment. Finally, the ultra-micro powder is obtained through grading. In the present application, no chemical reagent and enzyme preparation is used in the whole process, the processing temperature is lower than the thermal decomposition temperature of the resistance starch, the retention rate of the finished product resistance starch is greater than or equal to 93%, the dry basis content is greater than or equal to 28%, the powder is fine and has good cold water dispersibility, and the shelf life at room temperature can be more than 12 months. The present application has the advantages of simple process, controllable cost, suitability for large-scale production, no need for customizing special devices, short process flow, no complex reaction, separation and purification processes, low equipment investment and operation cost, and easy realization of large-scale industrial production.

The invention discloses a preparation method of polyimide-fluoromica composite coating slurry, which comprises the following steps: synthesizing a PI precursor solution: drying 4, 4-diaminodiphenyl ether and pyromellitic dianhydride, dissolving the dried 4, 4-diaminodiphenyl ether in a DMF (Dimethyl Formamide) solvent, adding the pyromellitic dianhydride in batches, and stirring to obtain a PAA (Polyacrylamide) solution; the preparation method comprises the following steps: synthesizing nano fluoromica, adding nano fluoromica particles and a catalyst into a PAA solution, continuously stirring in an environment of 30-80 DEG C, and carrying out ball milling to obtain a PAA / fluoromica mixed solution; and putting the PAA / fluoromica mixed solution into a muffle furnace for amidation, and carrying out segmented heating to obtain the polyimide-fluoromica composite coating slurry. The polyimide-fluoromica composite coating slurry has the advantages that the preparation is simple, the preparation cost is low, and the prepared polyimide-fluoromica composite coating slurry has high thermal conductivity, good pressure resistance, high temperature resistance, light weight, good sealing performance and good fatigue performance, and is suitable for packaging of integrated circuits.

The invention discloses a medicinal and edible plant beverage and a preparation method thereof, and relates to the technical field of beverage processing, the formula of the medicinal and edible plant beverage comprises the following components in parts by weight: 8-10 parts of momordica grosvenori, 2-4 parts of scaphium scaphigerum, 4-6 parts of chrysanthemum, 4-6 parts of pericarpium citri reticulatae, 1-3 parts of cape jasmine, 1-3 parts of lophatherum gracile, 1-3 parts of liquorice, 2-4 parts of platycodon grandiflorum, 0.05-0.15 part of sucralose, 0.05-0.15 part of aspartame and 0.01-0.03 part of menthol. And 1000 parts of deionized water. According to the medicinal and edible plant beverage and the preparation method thereof provided by the invention, green natural herbaceous plants are completely adopted in the formula, the chrysanthemum is chrysanthemum soaked in saline water and dried at low temperature, impurities are removed by using a centrifugal separation technology and a membrane separation technology after water extraction, and the product is high in clarity and good in stability. The product has the effects of clearing heat, relieving sore throat and moistening throat, is cool and refreshing in mouth feel, refreshing and restoring consciousness, has unique herbal flavor, is suitable for being drunk by vast consumers, especially patients suffering from swollen sore throat, and is feasible in overall process and easy to popularize.

The invention relates to the technical field of liquor filtration, in particular to a liquor filtration process which comprises the following steps: S1, preparing base liquor of a plurality of years, and reducing the alcohol content of the base liquor to obtain a plurality of samples; s2, carrying out adsorption treatment on the sample in the step S1 by using activated carbon, conveying the treated wine liquid to a membrane filter through a wine pump, and filtering to obtain filtered wine liquid at the flow rate of 5-12t / h; and S3, putting the filtered wine liquid in the step S2 into a refrigerator to obtain a filtered wine sample. The invention aims to provide the filtering process for the white spirit, which can reduce the loss of total acid and total ester and improve the product quality.

The application discloses a kind of chopped carbon fiber reinforced fluorine-containing resin composite material and preparation method and application, belong to composite material preparation technical field, the application includes: to chopped carbon fiber is sequentially carried out surface activation treatment, homogeneity coating treatment and chemical bonding treatment, to be gradually structured interface bonding layer on the surface of chopped carbon fiber;The treated chopped carbon fiber is mixed with fluorine-containing resin matrix, and extrusion forming is obtained, and composite material is obtained.The application is sequentially carried out surface activation, homogeneity coating and the three-step synergistic modification of chemical bonding, first activation provides reaction site, then pass through homogeneity coating and eliminate the interface energy difference between fiber and matrix, finally pass through chemical bonding and lock interface, and gradually structured interface layer of strong combination, effectively solve the problem that chopped carbon fiber and fluorine-containing resin interface compatibility is poor, and easily peeling, realize the significant improvement of the mechanical properties of composite material.

The present invention relates to a soluble germanium chelate catalyst and a preparation method and use thereof. The preparation method comprises the following steps: reacting germanium dioxide with an aqueous solution of an acid to generate a clear solution containing a germanium chelate, wherein the clear solution comprises an excess of acid; adding a Lewis base to the clear solution to neutralize the excess acid to obtain an aqueous solution of the germanium chelate; post-treating the aqueous solution of the germanium chelate to obtain a soluble germanium chelate catalyst; the acid is selected from a combination of one or more of a dibasic acid, and a C3-C6 dibasic acid or a tribasic acid containing a hydroxyl or amine group. Post-treatment includes two methods: directly adding ethylene glycol or cooling the aqueous solution for crystallization, washing, and drying, and then redissolving it in water and ethylene glycol. When the catalyst is used to catalyze the polymerization of PETG or PCTG, the viscosity and various hue qualities of the product can be significantly improved, and the catalyst is soluble, will not be deposited on the reactor wall or the melt pipeline, and will not affect the long-term operation of the device.

The invention discloses a special ultrasonic tissue-imitating phantom for cardiovascular and a preparation method thereof. The special ultrasonic tissue-imitating phantom comprises a heart phantom and a blood-imitating fluid, the heart body model is prepared from the following raw materials in percentage by mass: 5 to 35 weight percent of polyvinyl alcohol, 2 to 5 weight percent of a first cross-linking agent, 10 to 12 weight percent of a water-soluble organic solvent, 1 to 3 weight percent of an initiator, 5 to 7 weight percent of a second cross-linking agent and the balance of water, the first cross-linking agent comprises one or more than two of carboxymethyl cellulose sodium, glucose, boric acid and adipic acid; the second cross-linking agent is an amide compound; the simulated blood fluid is prepared from the following components in percentage by mass: 20 to 40 weight percent of polyvinylpyrrolidone and the balance of solvent. The system and the method can be simultaneously suitable for photoacoustic / ultrasonic imaging modes.