33results about How to "Process safety" patented technology

The invention discloses a preparation method and application of a bimetallic phosphate oxygen evolution electrode. The preparation method of the bimetallic phosphate oxygen evolution electrode comprises the following steps: cleaning a nickel substrate in an alkaline solution to remove oil, and cleaning the nickel substrate with pure water; soaking the cleaned nickel substrate in an acid solution, cleaning the nickel substrate with pure water, and placing the nickel substrate in the pure water for later use; the nickel substrate placed in the pure water serves as a cathode, two pure nickel materials are placed on the two sides of the nickel substrate to serve as two anodes, and electro-deposition is conducted on the nickel substrate in a bimetallic phosphate solution; and washing an electrode obtained after electrodeposition of the nickel substrate, and drying to obtain the bimetallic phosphate electrode. According to the preparation method, the adsorption free energy of a catalytic layer on the surface of the bimetallic phosphate oxygen evolution electrode on a reaction intermediate is optimized through the synergistic electronic effect of two metals, so that the intrinsic activity of oxygen evolution reaction is improved, meanwhile, a relatively stable catalytic layer structure is formed, and the stability of the bimetallic phosphate oxygen evolution electrode in the oxygen evolution process is improved.

The invention provides a ferronickel-based oxygen evolution electrode and a preparation method thereof based on interface confinement. The preparation method of the ferronickel-based oxygen evolution electrode comprises the following steps: preparing a precursor solution containing ferrous ions and ferric ions; the foamed nickel substrate is cleaned; the cleaned foamed nickel is tightly attached to the surface of the bottom of the reaction container, the foamed nickel is immersed in the precursor solution, under the room-temperature standing condition, divalent and trivalent iron ions are induced to be subjected to a synergistic hydrolysis and coprecipitation reaction through a physical interface confinement space formed by an attached interface, and the nickel-based composite material is obtained. Therefore, a high-activity and high-uniformity nickel-iron-based (oxygen) hydroxide catalyst layer (DIC-NiFeOOH / NF) is grown on the surface of the foamed nickel in situ. The method is simple in process, green and energy-saving, and the prepared nickel-iron-based oxygen evolution electrode shows excellent performance in oxygen evolution reaction and anion exchange membrane water electrolysis.

The invention discloses a lactobacillus delbrueckii subsp. Bulgaricus CCFM1520 for transforming curcumin to produce tetrahydrocurcumin to relieve nervous anxiety, and belongs to the technical field of microorganisms. The lactobacillus delbrueckii subsp. Bulgaricus CCFM1520 screened by the invention has the capability of converting curcumin, and can utilize curcumin and generate tetrahydrocurcumin. The invention further provides a synbiotic preparation prepared from the lactobacillus gasseri CCFM1481 and curcumin, the synbiotic preparation can be used as an anti-fatigue functional medicine, the individual behavioral memory level can be improved, the imbalance of body neurotransmitters (DA, 5-HT and NE) can be slowed down, the expression of body neuroprotection related genes (BDNF, TrkB, DRD1 and TH) can be improved, and the synbiotic preparation has a huge application prospect.

This invention belongs to the field of cosmetic technology, specifically relating to a method for preparing a lemon fruit extract containing sennaol and its application in soothing. This invention provides a method for preparing a lemon fruit extract containing sennaol, utilizing the strong penetration and dissolving power of a green solvent and the high selectivity of enzymatic reactions to achieve not only efficient extraction and conversion of sennaol but also naturally endowing the final product with excellent water solubility and chemical stability. The prepared lemon fruit extract can be directly applied to water-based formulations without complex modification or the addition of large amounts of co-solvents, maintaining potent skin-soothing activity. The entire process is gentle and safe, with no irritating organic solvents or strong acid residues, making it particularly suitable for cosmetic development targeting sensitive skin.

The invention belongs to the technical field of eutectic gels, and particularly discloses a severe environment-resistant eutectic gel as well as a preparation method and application thereof. The preparation method comprises the following steps: etching Ti3AlC2 with hydrofluoric acid to prepare MXene, and modifying MXene with a tetrabutylammonium hydroxide intercalation to obtain a tetrabutylammonium hydroxide intercalated MXene nanosheet; the preparation method comprises the following steps: by taking tetrabutylammonium chloride and thymol as raw materials, mixing, heating and stirring to obtain a deep eutectic solvent, sequentially adding isobornyl methacrylate, acrylic acid-2-phenoxyethyl ester, ethylene glycol dimethacrylate, diphenyl (2, 4, 6-trimethylbenzoyl) phosphine oxide and tetrabutylammonium intercalated MXene nanosheets into the deep eutectic solvent, stirring in a dark place, and carrying out vacuum drying, so as to obtain a finished product. And performing photo-crosslinking curing under ultraviolet irradiation to obtain the eutectic gel. The eutecticevaporate gel prepared by the invention not only has good mechanical properties, but also has good toughness, self-adhesion, freezing resistance, high temperature resistance, moisture resistance, drying resistance and excellent strain sensitivity, and overcomes the defect that the traditional hydrogel and hydrophilic eutecticevaporate gel are not moisture-resistant; the method has wide application prospects in the fields of flexible strain sensors, intelligent wearable devices, bionic electronic skins, medical health monitoring or intelligent soft robots and the like.

The invention discloses a green in-situ preparation method of a high-strength slow-release antibacterial fibrous membrane, which comprises the following steps: dissolving modified chitosan in water to obtain a modified chitosan aqueous solution, and slowly dropwise adding a silver source solution for reaction under the dark and heating conditions to obtain a modified chitosan solution containing nano-silver particles; mixing the solution with water to obtain a dilute solution; dissolving the modified chitosan and a spinning aid in a mixed solvent of a dilute solution and ethanol to obtain a spinning solution; or dissolving modified chitosan in a dilute solution to obtain a modified chitosan solution, dissolving a spinning aid in ethanol to obtain a spinning aid solution, and uniformly mixing the modified chitosan solution and the spinning aid solution to obtain a spinning solution; preparing the high-strength slow-release antibacterial fiber membrane from the spinning solution through a solution jet spinning technology; the modified chitosan contains a reducing group. The prepared high-strength slow-release antibacterial fiber membrane has the functions of high mechanical strength, long-acting antibacterial property and slow release of silver ions.

The utility model relates to the technical field of slitting equipment, in particular to a slitting machine for sealing strip processing, which comprises a base, a driving roller is movably mounted above the base up and down, a concave frame is fixedly connected to the upper surface of the base, a cutting roller is detachably mounted at the inner top of the concave frame, a through hole is formed in the center axis of the cutting roller, and the through hole is communicated with the driving roller. The inner wall of the through hole is rotationally connected with a screw through a bearing, the surface of the screw is in threaded connection with a moving block, and a square sliding groove is formed in the inner wall of the through hole. Through the arrangement of the screw rod, the moving block, the inclined plane sliding block, the mounting column and the reset spring, after cutting is completed, the arc-shaped cutting knife can be stored in the arc-shaped groove, an operator can be effectively prevented from being scratched by the arc-shaped cutting knife when the cutting roller is replaced, the personal safety of the operator is guaranteed, the operation risk is reduced, and the working efficiency is improved. And the whole machining process is safer and more reliable.

The invention relates to a method for enriching and recovering rhodium from organic waste liquid containing rhodium acetylacetonate, and belongs to the technical field of precious metal secondary resource recovery. The method comprises the following steps: carrying out reduced pressure evaporation on an organic waste liquid containing rhodium acetylacetonate, separating, condensing and recovering low-boiling-point organic components to obtain a distillation residual liquid containing rhodium acetylacetonate; adding a water phase complex breaking and phase inversion system into the distillation residual liquid, stirring and reacting to break complex of rhodium acetylacetonate and promote rhodium to transfer into a water phase, and separating an organic phase from the water phase to obtain a rhodium-containing water phase; adjusting the rhodium-containing water phase by using an alkaline solution under a stirring condition, stably controlling the pH value to be 6-9, simultaneously dropwise adding a sulfuration precipitant solution, reacting to generate rhodium-containing sulfide precipitates, carrying out heat preservation and aging treatment for 0.5-4 hours, carrying out solid-liquid separation to obtain rhodium enriched products, and sequentially washing and drying the rhodium enriched products to obtain the rhodium enriched products. The method is simple in process and mild in condition, and efficient phase inversion and enrichment recovery of rhodium in the rhodium acetylacetonate-containing organic waste liquid can be realized.

The utility model relates to the technical field of tunnel construction, in particular to a device for curing tunnel lining concrete. The device comprises a door frame structure which is provided with a top frame and side frames, and the two side frames are arranged below the top frame in a spaced mode so as to form a channel facilitating passage; the working platform is arranged on the side, deviating from the channel, of the portal structure; the spraying mechanism is used for spraying water mist to tunnel lining concrete; wherein a guide mechanism is arranged at the top of the portal structure, and a spray head of the spraying mechanism is mounted on the guide mechanism; the guide mechanism extends in the passing direction of the channel and extends out of the door frame structure in a suspended mode, and the spray head can be driven to move to the outer side of the door frame structure. According to the maintenance device, the guide mechanism is arranged to enable the spray head to move relative to the portal structure, so that the operation coverage of the maintenance device is enlarged, the moving frequency of the maintenance device is reduced, and rapid and safe maintenance operation is ensured.

The application discloses low-bitter rice residue peptide micelles, a rice residue protein hydrolysate and a preparation method and application thereof, and relates to the technical field of protein processing. The preparation method comprises the following steps: performing step-by-step enzymolysis on rice residue protein to perform directional cutting on the hydrophilic region and the hydrophobic region of the rice residue protein, so as to obtain an amphiphilic polypeptide mixture; adjusting the pH and the temperature, so that the amphiphilic polypeptide mixture is self-assembled to form rice residue peptide micelles, and low-bitter rice residue peptide micelles are obtained. The application aims to solve the technical problems that the existing rice residue protein enzymolysis product has significant bitterness, and traditional debittering technologies have the problems of nutrient loss or the need for external addition. A new mechanism of realizing physical debittering by constructing a supramolecular micelle structure is innovatively proposed and verified. The rice residue protein peptides after enzymolysis are self-assembled to form stable nanometer micelles through step-by-step enzymolysis and directional cutting, so that the hydrophobic groups causing bitterness are selectively embedded in the core of the micelles, and the contact of the hydrophobic groups with taste receptors is physically blocked.

The invention relates to a preparation method of a nickel-based electrode and a method for electrocatalytic oxidation of 5-hydroxymethylfurfural (HMF) by using the nickel-based electrode. The nickel-based electrode comprises a substrate material and a catalyst layer, and the catalyst layer is nickel hydroxide in different forms or chromium-doped nickel hydroxide. According to the chromium-doped nickel hydroxide electrode, the catalytic performance of electrooxidation of HMF into 2, 5-furandimethyl (FDCA) can be greatly improved. Taking the nickel-based electrode as an anodic oxidation electrode, taking metal platinum as a cathode electrode, respectively filling two sides of a double-chamber electrolytic cell separated by an ion exchange membrane, adding an alkaline electrolyte into two sides of the electrolytic cell, and adding an HMF solution into the anode side; the electrocatalytic oxidation method is carried out in the electrolytic cell under a certain voltage, the anode is subjected to an HMF electrooxidation reaction and is converted into FDCA, and the cathode is subjected to an electrolytic water hydrogen evolution reaction. The nickel-based catalyst can efficiently electro-catalyze HMF to be oxidized into FDCA, meanwhile, the electrolytic water hydrogen evolution reaction is coupled, and the nickel-based catalyst has excellent catalytic efficiency and stability.

The application relates to a preparation method of (S)-oxetan-2-methylamine and a p-toluenesulfonic acid salt thereof. By adopting a specific preparation route, the problem of poisoning of a palladium-carbon catalyst caused by residual sulfur elements is solved, and the use of explosive and highly toxic sodium azide is avoided. The process is safe and reliable, raw materials are low in price, product quality is good, chiral purity is high, and the method is suitable for industrialized scale production.

The utility model discloses an oiling device for bearing machining, which belongs to the technical field of bearing machining and is characterized by comprising a workbench and an oil tank mounted on the surface of the workbench through a support, an electric oiling device is mounted on the surface of the support, a rotary table is arranged above the workbench, and the rotary table is connected with the oil tank. A plurality of first sliding grooves are evenly formed in the surface of the rotary table. Through the cooperation of the V-shaped groove clamping block and the first spring, the bearing oil injection device is suitable for bearings with different sizes and diameters in a reasonable range, stable clamping is achieved, the positioning rod and the abutting plate are tightly attached to the inner wall of the bearing through the elasticity of the second spring, inner ring positioning is completed, the double-clamping design ensures that the bearing is kept fixed in the oil injection process, and the oil injection efficiency is improved. And the compatibility is high, the clamp does not need to be frequently replaced, the machining efficiency is remarkably improved, pause time is provided for oil injection by arranging the intermittent rotating structure grooved wheel and the Maltese cross, and an operator can conveniently check or adjust the oil injection amount.

The invention discloses a method for preparing vinyl ether by taking ethylene glycol as a raw material. According to the method, industrial raw materials including ethylene glycol and alkyl alcohol which are low in price are adopted, a solid acid catalyst and a solid base catalyst are used for catalyzing an etherification reaction and a cracking reaction respectively, and therefore the vinyl ether product with the high additional value is prepared. The method is good in economic benefit, and the technology and the device are high in universality; a green reaction process is adopted, the process is safe and environment-friendly, and the device can be large-scale; the cracking byproduct alcohol is recycled as an etherification reaction raw material, the raw material utilization rate is high, and energy utilization is reasonable.

The invention discloses a wear-resistant gradient composite coating for the surface of a carbon fiber composite material, and belongs to the technical field of surface protection materials. The coating takes epoxy resin as a matrix, and comprises a boron carbide hard phase in gradient distribution and a multi-phase lubricating system consisting of graphite, molybdenum disulfide and an imidazolium ionic liquid lubricating synergist, wherein the content of boron carbide is gradually increased layer by layer from the bottom layer to the surface layer to form a hardness gradient transition structure. The preparation method comprises the following steps: respectively preparing bottom layer slurry, middle layer slurry and surface layer slurry with different filler contents; sequentially applying each layer of slurry by adopting a layered coating process; and finally, staged curing molding is performed under the low-temperature condition of not exceeding 100 DEG C. Through cooperation of gradient structure design and multi-component lubrication, unification of high hardness, low friction coefficient and strong interface bonding force of the coating is realized under the low-temperature process condition, the wear resistance of the carbon fiber composite material in a harsh friction environment is effectively improved, and the service life of the carbon fiber composite material in the harsh friction environment is effectively prolonged.

This invention relates to the field of N-(2,4-dinitrophenyl)-4-nitrobenzamide preparation technology, specifically to a green method for preparing nitramide compounds. The method involves adding a catalyst and dispersant to a reactor and mixing them uniformly. Then, a first and a second stream of materials are simultaneously added dropwise to the reactor for reaction. The temperature within the system is controlled during the dropwise addition. After the dropwise addition is complete, the temperature is increased to continue the reaction. After the reaction is completed, N-(2,4-dinitrophenyl)-4-nitrobenzamide is obtained through post-treatment. The first stream is a dispersion containing 4-nitro-N-phenylbenzamide, and the second stream is a nitrating agent consisting of a uniform mixture of N₂O₅ and nitric acid. This preparation method features high product conversion rate, a mild reaction process, safe and controllable production process, effectively reduces the amount of residual intermediates, and minimizes pollution.

This utility model relates to the field of PVC pipe processing and discloses a PVC pipe sawing device that facilitates safe clamping. It includes a base and a clamping motor. The clamping motor is fixedly connected to the rear of the base, and a gear is fixedly connected to the output shaft of the clamping motor. The front and rear ends of the gear are respectively meshed with gear rails, and each gear rail has a set of movable seats fixedly connected to its top. This PVC pipe sawing device, by setting up clamping plates, allows for clamping. During clamping, a cylinder is activated, pushing the clamping plates forward via a connector to adjust the clamping position. Then, the clamping motor is activated, driving the gear to rotate, causing the two sets of gear rails to move relative to each other. The two sets of fixed plates then move relative to each other, allowing the two clamps to clamp the PVC pipe from the side. This achieves the action steps of first determining the distance and then clamping, facilitating segmented, fixed-distance cutting with the saw blade. The automatic clamping process is safer and solves the safety problems associated with manual clamping.

The application belongs to the technical field of organic synthesis, and particularly discloses a preparation method of a NiO / Beta supported catalyst and application of the catalyst in synthesis of carvacol, wherein the NiO / Beta supported catalyst is prepared through the following steps: (1) preparing a nickel nitrate aqueous solution, Beta molecular sieve is immersed, and the catalyst precursor is obtained after drying and calcination; (2) the catalyst precursor and a binder are added into a pulverizer and broken and stirred at high speed, then water and glycerol are added into the mixture and stirred and kneaded, the material is formed into a columnar catalyst through an extruding machine, and the columnar NiO / Beta supported catalyst is obtained through a natural air drying, drying and calcination process. The catalyst prepared by the application has a special pore structure, excellent shape selection ability, a large specific surface area, high catalytic activity and reusability. When the catalyst is used in catalytic synthesis of carvacol, two common raw materials, namely, o-cresol and isopropyl alcohol, are adopted, the process is simple and safe, and the reaction has high conversion rate and selectivity.

This invention relates to a method for preparing ennasstat in the field of pharmaceutical synthesis technology. The method involves first hydrolyzing compound 2 with a strong base to generate 7-hydroxy-5-(2-phenylethyl)-[1,2,4]triazolo[1,5-a]pyridine-8-carboxylic acid, which is then reacted in situ with pentanoyl chloride to form a mixed anhydride. This anhydride is then condensed with glycine ester hydrochloride, followed by direct hydrolysis without separation to finally obtain high-quality ennasstat. This invention offers advantages such as safer process, higher product purity and yield, significantly reducing the raw material cost of ennasstat and demonstrating substantial economic and social benefits.

The present application provides an aldehyde liquid phase hydrogenation reaction system, which is provided with a novel liquid phase hydrogenation reactor. The reactor is provided with upper and lower column catalyst bed layers, and the outer wall is provided with baffles; the bed support structure and the redistributor are arranged between the upper and lower column catalyst bed layers; the support porcelain ball and the wire mesh layer are arranged below the lower column catalyst bed layer; the first fresh hydrogen inlet is arranged at the top of the cylinder, and the liquid phase inlet is arranged below the first fresh hydrogen inlet; the second fresh hydrogen inlet is arranged above the redistributor; the boiler water inlet and the water vapor mixed outlet are arranged in the upper and lower column catalyst bed layers, respectively; the bottom of the cylinder is provided with a liquid phase outlet; the gas phase outlet is arranged below the lower column catalyst bed layer; the fresh hydrogen is input through the first fresh hydrogen inlet and the second fresh hydrogen inlet; the water vapor mixed outlet is connected with the steam drum; the liquid phase outlet and the gas phase outlet are connected with the separation tank, and the top of the separation tank is connected with the vent gas cooler. The present application avoids the problem of temperature rising, produces high-grade steam as by-product, and saves energy and reduces consumption.

This invention relates to a refining method for LF (Leaf-Fuel) steel scrap. The refining method includes the following steps: tapping steel from the converter; after molten steel enters the LF furnace, power is supplied, and slag is added; after adding the slag, steel scrap containing precious metals is added according to the molten steel temperature t1. When 1520℃≤t1<1530℃, the rate of adding steel scrap is 270-310 kg / min; when 1530℃≤t1<1540℃, the rate of adding steel scrap is ≤410 kg / min; when 1540℃≤t1<1550℃, the rate of adding steel scrap is ≤510 kg / min; and when t1≥1550℃, the rate of adding steel scrap is ≤610 kg / min. This refining method can effectively recover precious alloying elements from steel scrap, achieving resource reuse. Furthermore, the process is safe, ensuring personal safety and protecting the integrity of production facilities and equipment, and is highly practical.

This invention discloses a pyrometallurgical-hydrometallurgical parallel integrated method for recovering valuable metals from hard zinc, belonging to the field of resource recovery technology. The method includes two-stage vacuum distillation, oxidative leaching, iron extraction, copper displacement, and germanium precipitation. First, two-stage vacuum distillation separates and recovers zinc and lead, which constitute a larger proportion of the hard zinc. Then, a hydrometallurgical process is used to recover silver, iron, copper, germanium, and other elements in stages. This method solves the problems of complex processes, high operational difficulty, high reagent costs or energy consumption, and significant safety and environmental impact associated with traditional hydrometallurgical or pyrometallurgical integrated recovery of hard zinc. Using the method disclosed in this invention, copper and silver recovery rates ≥95%, germanium recovery rate ≥96%, iron resource utilization rate ≥98%, and lead and zinc direct recovery rate ≥98%. Furthermore, the purity of the obtained crude lead is ≥96%, and the purity of the crude zinc is ≥98.5%. This method has advantages such as simple process flow, low energy consumption, safe and controllable operation, and good results.

The invention belongs to the technical field of uranium concentration, and particularly relates to a method and device for treating solid impurities. The method comprises the steps that KrF2 is introduced into a pipeline to be cleaned, so that the KrF2 reacts with uranyl fluoride in the pipeline to be cleaned, and UF6, Kr and O2 are obtained. According to the method, reaction byproducts are basically only inert gas krypton, oxygen and other non-toxic and harmless substances, the difficulty load and danger of post-treatment of the products are reduced, the safety and environmental protection of the process are ensured, and solid impurities are completely removed under the conditions that the amount of introduced KrF2 gas is enough and the reaction condition is proper.

The integrated polishing equipment comprises a main body frame, a first station and a second station are arranged on the main body frame, a product transportation module is arranged right in front of the main body frame, and a plurality of first manipulators are further arranged between the product transportation module and the main body frame; a transfer limiting frame is arranged at the tail end of the product transportation module; a vertical frame is arranged on the side face of the main body frame, and a second manipulator capable of moving relative to the vertical frame is arranged on the vertical frame; the vertical frame is further provided with a brush assembly and a visual inspection assembly, and a product rotating module is arranged under the brush assembly. A double-speed conveying assembly is arranged on the side face of the product rotating module, and a discharging mechanical arm is arranged at the tail end of the double-speed conveying assembly. The first mechanical arm, the second mechanical arm and the discharging mechanical arm are matched with one another, so that the automatic feeding, discharging and boxing procedures are completed; and through mutual cooperation of the visual detection assembly and the brush assembly, products are detected in advance, dust is sucked, and the product machining quality is better.

The utility model provides a bearing press-fitting device, which relates to the technical field of bearing press-fitting instruments and comprises a pressure motor, a top plate, an air suction machine, a protective door A, a conveying belt, a base, a support column, a protective door B and a small motor. The middle and one side of the top of the top plate are each provided with a plurality of sets of round threaded connecting holes. The bottoms of the pressure motor and the air suction machine are fixedly connected into the round threaded holes in one side of the middle of the top of the top plate. The bottom of the top plate and the top of the base are each provided with five sets of circular threaded connecting holes and are connected in a fastened mode through supporting columns. And the clamp is arranged, so that various products can be placed for bearing press-fitting assembly, and a single device can be used for press-fitting of various products. And the protection door A and the protection door B are arranged and can be opened and closed by rotating by 90 degrees, a good protection effect is achieved, and machining is safer. And an air suction machine and a conveying belt are arranged, so that the bearing replacement automation of the device is realized, and the replacement time cost is saved.

The invention discloses a preparation method of penta (dimethylamino) tantalum, and belongs to the technical field of synthesis of metal organic compounds. The method comprises two core processes: firstly, in an inert atmosphere, tantalum metal powder and tin powder are subjected to mechanical activation treatment in an inert hydrocarbon solvent, and an oxide layer on the surface of the tantalum powder is broken to obtain tin activated tantalum powder; then, in an inert atmosphere and a mixed solvent system, dimethylamine gas is introduced into the activated tantalum powder, a composite reducing agent composed of NaBH4 and CuCl2 is added, and penta (dimethylamino) tantalum is generated in one step through a reduction-amination synergistic reaction. Cheap tantalum powder is used as a raw material, a green reduction system is used for replacing a high-risk alkyl lithium reagent, and the method has the outstanding advantages of being low in cost, high in safety, good in product purity, high in reaction efficiency and the like and is suitable for industrial large-scale production.

The application discloses a method for extracting wax from No.0 diesel oil, and the method comprises the following steps: step 1, irradiating and heating No.0 diesel oil by 3-10 DEG C, and the spectrum wavelength during irradiation is 532-808 nm; step 2, spraying the heated No.0 diesel oil on the surface of a cooling object; and step 3, collecting the diesel oil dropped from the surface of the cooling object. The application effectively separates the wax components from No.0 diesel oil, so that the flowability of the No.0 diesel oil at a lower temperature is improved.

The application discloses a SrTiO3-based ceramic with ultrahigh dielectric constant and low dielectric loss, and a chemical composition of the ceramic is Sr 1‑1.5x Gd x TiO3 (0.008≤ x ≤0.014). A preparation method comprises the following steps: according to a stoichiometric formula Sr 1‑1.5x Gd x TiO3, primary ball milling, drying, grinding, briquetting, pre-sintering, obtaining a block B, secondary ball milling, drying, grinding, sieving, pressing a green body, and sintering. 1‑1.5x Gd x The SrTiO3-based ceramic material has ultrahigh dielectric constant ε r (>10 5 ) and low dielectric loss tanδ (<0.05), the preparation process is simple, the material cost is low, the sintering is carried out in a nitrogen environment, the process is safe, and the process is green and environment-friendly.

The invention relates to a water-absorbent resin drying method which comprises the following steps: (1) washing coarse colloidal particles of water-absorbent resin with an organic washing solution and water to obtain washing mother liquor and wet colloidal particles; (2) filtering the wet colloidal particles obtained in the step (1) to obtain dry colloidal particles and filtered mother liquor; (3) granulating the dry glue particles obtained in the step (2) to obtain colloidal particles; and (4) drying the colloidal particles obtained in the step (3) to obtain the water-absorbent resin. By optimizing the traditional granulation and drying procedures into washing, filtering, granulation and drying procedures, bound water needing to be dried is greatly reduced, the super absorbent resin particles with low liquid content are finally obtained, and the method has the advantages of being high in production efficiency, good in product quality, low in energy consumption, mild and friendly in operation environment, relatively low in fixed investment and the like, and is suitable for large-scale production.

The present invention relates to a wind turbine blade comprising a lightning protection system with at least one tip end lightning receptor arranged at an outer surface of the blade and a down conductor extending within the blade. The blade comprises carbon fibre reinforced spar caps, wherein a conductive fabric forms an electric connection between the tip end of spar cap and the lightning receptor.