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Perovskite solar cell and preparation method thereof
ActiveCN105609641AImprove film morphologyReduce surface defectsFinal product manufactureSolid-state devicesThin film morphologyLiquid-crystal display
The invention relates to a perovskite solar cell and a preparation method thereof. By arranging a liquid crystal layer on the surface of an electron transmission layer or a hole transmission layer, the thin film morphology of the electron transmission layer or the hole transmission layer is improved, the defect on the surface of the electron transmission layer or the hole transmission layer is passivated, the transmission of reverse current carriers is effectively blocked, the electric leakage generation is prevented, the combination probability of electrons and holes which are generated in a perovskite light absorption layer is reduced, and the photoelectric conversion efficiency and the stability of the cell are improved; and meanwhile, the liquid crystal layer is prepared by a low-temperature solution method, and the preparation method is suitably used for roll-to-roll industrial production of the perovskite photovoltaic cell, and is simple in process and low in fabrication cost.
Owner:CHINA LUCKY FILM CORP
Preparation method of bionic artificial nerve scaffold established by collagen
The invention discloses a preparation method of a bionic artificial nerve scaffold established by a collagen. The method comprises the following steps: firstly preparing the collagen in three different shapes for later use: 1) dissolving the frozen and dried collagen by using hexafluoroisopropanol and preparing a nanofiber thin film by using an electrospinning technique; 2) preparing a linear scaffold containing an ordered fine pipeline by the collagen by combining freezing and drying with a mechanical stretching technology; and 3) dissolving the collagen in pure water to prepare a hydrogel; then, coiling the nanofiber thin film into a tube to simulate perilemma, wherein the ordered pipeline linear scaffold is filled in the tube to simulate perineurium; and finally, filling the hydrogel in the pipeline of the linear scaffold and the gap of the scaffold to simulate endoneurium. The bionic artificial nerve scaffold based on a bionic theory better simulates the structure of peripheral nerves and can promote and guide axon and Schwann cells to grow orderly and pass through damaged peripheral nerves based on a good mechanical property.
Owner:广州南方医大科技园有限公司
Device for controlling interaction of various cells as well as preparation method and application thereof
ActiveCN102140422AInteraction effectAffect mobileBioreactor/fermenter combinationsBiological substance pretreatmentsAdhesion processCell adhesion
The invention provides a device for controlling interaction of various cells as well as a manufacturing method and application of the device. The device provided in the invention comprises a glass substrate (1) and a polydimethylsiloxane seal (2) with a plurality of grooves, wherein the polydimethylsiloxane seal is attached to the surface of the glass substrate to respectively form a plurality of micro-channels, the glass substrate in each micro-channel can be selectively modified to be a substrate for promoting cell adhesion by incubating extracellular matrix proteins or can be modified to be a cell adhesion-resistant substrate by assembling polyethylene glycol solution or is not modified. The device is simple and easy to operate, can control fixation, all movement and partial movement of various cells to achieve the purpose of arbitrarily controlling various cells, can be used for researching the interaction among various cells, the pathology or the cell biological development and can also be used for screening medicines.
Owner:THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
Water body ecological restoration method
ActiveCN105858898ATackle eutrophicationEffective absorptionSustainable biological treatmentBiological water/sewage treatmentEcological environmentSludge
The invention belongs to the technical field of ecological restoration and particularly relates to a water body ecological restoration method. The water body ecological restoration method comprises the steps that the water surface is cleaned, then submerged plants, emergent aquatic plants and floating-leaved plants are planted, and aquatic animals are put in. According to the water body ecological restoration method, sludge at the water bottom is treated with a plant blanket in-situ coverage method, root systems of the emergent aquatic plants are fixed with pollution-free clay, and a putting-in type planting method is adopted for the floating-leaved plants and the emergent aquatic plants. The aqueous plants can provide an adhesion symbiotic space for microorganisms, and provide a food source for aqueous animals, fish and shellfish are put in when the aquatic plants grow stably, and a rapid and simple water body forest system is formed. By means of the water body ecological restoration method, the effects of fixing sludge at the water bottom, restoring the natural ecological environment and maintaining the water to be clear permanently can be achieved; meanwhile, a dwelling site can be provided for fish and birds, and certain river landscape can be formed.
Owner:ZHONGKAI UNIV OF AGRI & ENG
Device and method for operating multiple adherent cells on same substrate
InactiveCN101624569AOrderly growthOrdered AdhesionTissue cultureTissue/virus culture apparatusCell–cell interactionEngineering
The invention relates to a device and a method for adhering multiple cells to the same substrate and operating the cells, which divide a gold surface of the substrate into a modifiable region and an unmodifiable region by using a microflow pipeline of PDMS. The method comprises the following steps: introducing different molecular modifications to different pipeline regions to ensure that the substrate is divided into a cell adhesive region and a cell nonadhesive region; inoculating different cells in different adhesive regions, taking away the PDMS, and adhering multiple cells to the surface in sequence; electrochemically desorbing to destroy combination of molecules and gold in the nonadhesive region to ensure that all kinds of cells can move freely; and selectively modifying two sides of one or more cells as the nonadhesive region, separating other cells by using PBS, removing PDMS, and fixing the selected cells to lead other cells to move freely. The method and the device have simple and easy operation, can control fixation, complete motion or partial motion of different cells to achieve the aim of operating multiple cells at will, and can be used for studying interaction among multiple cells and medicinal screening.
Owner:THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
Apparatus for ordered adhering various cells to setting position of same substrate and adhesion method
InactiveCN101363019AOrderly growthOrdered AdhesionImmobilised enzymesMicrobiological testing/measurementCell-Extracellular MatrixPolyethylene glycol
The invention relates to a device and an absorption method for adhering a plurality of types of cells on a set position of a same substrate, the device comprises: the substrate with the upper surface which is evaporated with a titanium / chromium adhesion layer and a metal layer and a polydimethylsiloxane seal with a hydrophilic surface and the lower surface which comprises at least one group of micro-groove units; the lower surface of the seal is adhered on the metal layer to form a sealed pipeline by reversible combination; FN is introduced to the second and the fifth grooves to form extracellular matrix proteins within 10min; ethanol water solution of block copolymer of poly (L-lysine)-polyethylene glycol-poly (L-lysine) is introduced to the first and the third grooves to form absorption layers; EG6 is introduced to the fourth and the sixth grooves to form inert mono-molecular film layers in and around the fourth and the sixth grooves. The device and the absorption method can lead a plurality of types of cells to be adjustably and orderly adhered on the same substrate, thereby understanding the effects of a drug to the different types of the cells, screening the drugs and providing a new route for founding the drugs and carrying out the analysis of toxic substances.
Owner:THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
Gallium oxide nanotube and preparation method and application thereof
ActiveCN112875742AAvoid pollutionOrderly growthGallium/indium/thallium compoundsNanowirePtru catalyst
The invention discloses a gallium oxide nanotube as well as a preparation method and application thereof. The preparation method comprises the following steps: arranging a catalyst on a substrate, and growing and forming a gallium oxide nanowire on the substrate by using the catalyst; removing the catalyst at the top end of the gallium oxide nanowire, or enabling the catalyst at the top end of the gallium oxide nanowire to be naturally exhausted in the nanowire growth process; and arranging metal gallium in the center of the top end face of the gallium oxide nanowire, and then corroding the interior of the gallium oxide nanowire through self-reaction corrosion of the metal gallium and gallium oxide, so as to obtain the gallium oxide nanotube with the hollow interior. According to the preparation method of the gallium oxide nanotube provided by the embodiment of the invention, the preparation of the high-crystal-quality nanotube array vertical to the surface of the substrate is realized by utilizing a gallium self-reaction corrosion technology, the pollution of other materials to the nanotube is avoided, and the gallium oxide nanotube can be applied to the fields of ultraviolet light electron, gas detection or adsorption and the like.
Owner:SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
Preparation method for flocculus-shaped SnS<2> negative electrode material of lithium ion battery
ActiveCN106549156AImprove cycle stabilityHigh crystallinityMaterial nanotechnologyTin compoundsHigh current densityAlcohol
The invention discloses a preparation method for a flocculus-shaped SnS<2> negative electrode material of a lithium ion battery. The preparation method comprises the steps of 1) dissolving sodium thiosulfate into deionized water to prepare a solution A, and dissolving stannic chloride pentahydrate into deionized water to prepare a solution B; 2) adding the solution B into the solution A dropwise, continuously stirring to obtain a uniform mixed solution C, and gradually adding ethylene glycol into the mixed solution C to form a uniformly-mixed solution D; 3) adjusting the pH of the mixed solution D to be 2-9 to form a solution E; 4) putting the solution E into a homogeneous hydrothermal reaction kettle to be sealed, and then putting into a homogeneous hydrothermal reactor to be reacted; and 5) after the reaction is completed, taking out a precursor, and performing centrifuging and washing by deionized water and absolute ethyl alcohol separately, and then performing freezing and drying to obtain the flocculus-shaped SnS<2> negative electrode material of the lithium ion battery. The preparation method is low in cost, simple in operation and short in preparation period; and the prepared flocculus-shaped SnS<2> negative electrode material of the lithium ion battery has relatively high cycling stability at high-current density.
Owner:SHAANXI UNIV OF SCI & TECH
Apparatus for ordered adhering various cells to setting position of same substrate and adhesion method
ActiveCN101363020AOrderly growthOrdered AdhesionImmobilised enzymesMicrobiological testing/measurementCell-Extracellular MatrixEvaporation
The invention relates to a device which conglutinates multiple cells to the set position of the same substrate, a preparation method and the usage thereof; the device comprises the substrate which is plated with a titanium or chromium adhesion layer and a golden layer on the upper surface in a way of evaporation, a poly-dimethylene siloxane stamp which is treated by oxidation, has a hydrophilic surface and is provided with at least one group of micro chase units on the lower surface; a vertical through hole communicated with the corresponding groove is arranged at the end part of the grooves on the stamp; the lower surface of the stamp is stuck on the golden layer of the substrate and is combined with the golden layer in a reversible way to form a closed pipeline; when the closed pipeline is formed in 10min, FN is pumped into the middle, the second and the fifth grooves of the stamp; subsequently, EG6 is pumped into the first, the third, the fourth and the sixth grooves; after 1-3h, extracellular matrix proteins are formed on the golden layers of the middle, the second and the fifth grooves, and inertia monomolecular membrane layers are formed on the golden layers and the surrounding of the first, the third, the fourth and the sixth grooves. The device orderly conglutinates multiple cells to the same substrate in an adjustable way, and can be used for understanding the action of medicine on different cells as well as for drug screening.
Owner:重庆龙翼生物科技有限公司
Scar silicone gel and preparation method thereof
InactiveCN111450111AFast film formationOrderly growthInorganic phosphorous active ingredientsAerosol deliverySilicone GelsBiomedicine
The invention belongs to the technical field of biomedicines, and particularly relates to a scar silicone gel. The scar silicone gel is prepared from silicone, bioactive mineral materials, a thickenerand an antioxidant. According to the scar silicone gel, the shortcomings of single structural components and limited effects of existing silicone gel products are overcome. The invention further relates to a preparation method of the scar silicone gel. The preparation method includes the steps that the silicone is weighed according to the formula, and after uniformly dispersing is carried out, the formula mass parts of the bioactive mineral materials, the thickener and the antioxidant are sequentially added, fully and evenly dispersing is carried out, and the obtained mixture is filled in a packaging container to obtain the scar silicone gel. The preparation method is simple in process and convenient for industrialization.
Owner:BEIJING BEST LIFE REGENERATIVE MEDICINE TECH CO LTD
Expanded graphite anode material supporting willow-leaf-like iron (II,III) oxide and preparation method of expanded graphite anode material
ActiveCN108336330ASpecial morphologyIncrease energy densityNegative electrodesLi-accumulatorsRefluxIron salts
The invention discloses an expanded graphite anode material supporting willow-leaf-like iron (II,III) oxide and a preparation method of the expanded graphite anode material. The preparation method mainly comprises the following steps: (1) dispersing expanded graphite; (2) preparing a mixed solution of an iron salt and a structure-directing agent; (3) dropwise adding the mixed solution of the ironsalt and the structure-directing agent; (4) performing heating reflux; (5) performing reduction with a sodium borohydride alkaline solution; (6) performing filtering and washing; (7) performing intermediate-temperature calcination. The prepared iron (II,III) oxide supported expanded graphite anode material has special morphology and structure and excellent electrochemical performance.
Owner:DONGGUAN KAIJIN NEW ENERGY TECH
Preparation method of laccase from sparassis crispa
InactiveCN110184244AAppropriate ageHigh laccase activityFungiMicroorganism based processesFiltrationPeak value
The invention discloses a preparation method of laccase from sparassis crispa. The preparation method comprises the following steps (1) taking mixed fruit peel as a fermentation substrate, mixing themixed fruit peel with activated carbon, performing homogenizing, performing filtration, and performing sterilization so as to obtain a fruit peel solid-state culture medium; (2) inoculating the fruitpeel solid-state culture medium with activated sparassis crispa strains, and performing primary fermentation culture; (3) performing laccase enzyme activity monitoring on primary fermentation products, after enzyme activity reaches the peak value, selecting sparassis crispa mycelium balls obtained in the step (2), inoculating liquid nutrient mediums containing Cu2+ and inducers with the selected sparassis crispa mycelium balls, performing shaking flask culture to produce enzymes, and then conveying the enzymes into a fermenter; and (4) adding amino-oligosaccharin and biological fermentation antifoaming agents to the fermenter, and performing secondary deep fermentation so as to obtain fermentation products namely the laccase produced from sparassis crispa. The laccase is high in enzyme activity, the sparassis crispa is appropriate in fermentation bacterium age, and fermentation strains are high in purity and high in yield.
Owner:FUQING CITY FIRE KIRIN EDIBLE FUNGUS TECH DEV
Liquid wound spray dressing and preparation method thereof
ActiveCN111166932AAntibacterialHas hemostatic and pain-relieving effectsPharmaceutical delivery mechanismBandagesWound dressingSilver sulfadiazine
The invention belongs to the field of medical dressings, and particularly relates to a liquid wound spray dressing and a preparation method thereof. The liquid wound spray dressing comprises raw material components of silver sulfadiazine, lidocaine, chitosan, polyvinyl alcohol, ethanol, a preservative, purified water and the like. By optimal design of the component types, proportion and preparation method, long-term bacteriostasis and hemostasis of the liquid wound dressing can be improved, invasion of bacteria can be resisted for a long time, orderly growth and texture repair of wound tissuecan be prompted, and the wound healing process can be accelerated. The liquid wound dressing has definite curative effect, is safe and reliable to use and non-irritant to skin, and has better practical value and popularization and application significance, and the preparation method is quick and simple.
Owner:海南妙音春制药有限公司
Bioactive glass gel and production process of same
The invention discloses bioactive glass gel. The protective gel includes: bioactive glass, sodium hyaluronate, Vaseline and glycerin according to weight ratio of 24.5:0.05:75:0.75, wherein the bioactive glass comprises, by weight, 4-5% of SiO2, 24% of CaO, 25% of NaO and 6% of P2O5. The bioactive glass gel can inhibit growth of bacteria, reduce inflammatory exudation, reduce circulation resistance, promote angiogenesis, adsorb proliferated cells, accelerate healing of a wound, modify arrangement of collagen and reduce scar formation. The bioactive glass gel is easy to prepare.
Owner:张河
Micro-fluidic chip used for reconstructing bone cell microenvironment and use method thereof
ActiveCN105331535AReflect biological characteristicsSolve problems that create the same fluid stressBioreactor/fermenter combinationsBiological substance pretreatmentsAlcoholGrid pattern
The invention provides a micro-fluidic chip used for reconstructing the bone cell microenvironment and a use method thereof. The micro-fluidic chip is characterized in that a two-dimensional grid pattern with gold as a substrate is constructed, the surface of the pattern is subjected to hydrophobic modification through soaking sulfur alcohol, and therefore cells orderly grow along the pattern; meanwhile, bone cell bodies are covered with calcium alginate polymers, and cell synapsis is exposed. In this way, fluid stress is amplified at the synapsis portions, the problem that in a traditional bone cell fluid stress stimulating experiment, same fluid stress is formed on the surfaces of the cell bodies and the surfaces of the cell synapsis is solved, and the biological characteristics of the bone cells in the physiological status can be more truly reflected.
Owner:INST OF ELECTRONICS CHINESE ACAD OF SCI
Method for regulating and controlling crystal face orientation of metal material, metal material obtained through method and application of metal material
ActiveCN114480792AOrderly growthArranged in orderCell electrodesElectrodesElectrical batteryMetallic materials
The invention relates to a method for regulating and controlling the crystal face orientation of a metal material, the metal material obtained through the method and application, and the method comprises the following two steps that the crystal face orientation of the metal material is regulated and controlled through introduction of residual stress and low-temperature annealing, preferred even single crystal face orientation is obtained, and the crystal face orientation of the metal material is regulated and controlled. The method is used for regulating and controlling the electrochemical electron-ion exchange process of a metal material to obtain a high-activity and high-uniformity metal interface, and is successfully applied to the fields of battery metal negative electrode materials, metal negative electrode current collector materials and electro-catalysis.
Owner:CENT SOUTH UNIV
Autogenous wound tissue regeneration and repairing ointment and preparation method thereof
ActiveCN110680832APromotes accelerated wound healingAchieve regenerative repairHydroxy compound active ingredientsInorganic phosphorous active ingredientsNervous systemExtracellular ground substance
An autogenous wound tissue regeneration and repairing ointment is characterized by being composed of the following raw materials (by weight): 10-40 parts of a regenerative medical material, 5-20 partsof polyethylene glycol 4000, 30-80 parts of polyethylene glycol 400, 5-25 parts of glycerin, and 0.5-3 parts of medical grade vitamin E oil. By mixing the regenerative medical material, polyethyleneglycol, glycerin and medical grade vitamin E oil according to a certain ratio in a specific way, the effect of guiding ordered creeping substitution of cells, extracellular matrix, blood vessels andother tissues can be achieved, acceleration of wound healing can be promoted, the repair of the nervous system of the wound is synchronized, the orderly growth of the new tissue fiber layer is realized, the regeneration of capillaries and hair follicles is achieved, and autogenous wound tissue regeneration and repairing are realized, and the formation of scars is inhibited. Meanwhile, the PH valueof the mixture is 7.3 to 7.8, which is closer to the pH value of the human body and is less irritating to the human body during use, thereby reducing the pain of patients.
Owner:北京幸福益生高新技术有限公司
Hydrophobic spherulite, hydrophobic material, hydrophobic composite material, Janus composite material as well as preparation methods and application thereof
ActiveCN112900081ALarge specific surface areaImprove hydrophobicityLayered productsBiochemical fibre treatmentMicro nanoNano structuring
The invention provides a hydrophobic spherulite, a hydrophobic material, a hydrophobic composite material, a Janus composite material as well as preparation methods and application thereof. The hydrophobic spherulite is a hydrophobic spherulite of a micro-nano structure formed by crystallizing a hydrophobic substance, and the micro-nano structure comprises a micron-sized crystal nucleus and a nano-sized crystal whisker growing on the surface of the crystal nucleus, wherein the hydrophobic spherulite is of the micro-nano structure formed by the hydrophobic substance, has a relatively large specific surface area, can load more hydrophobic groups, and has better hydrophobic performance and proper filtering efficiency; according to the hydrophobic material, the hydrophobic spherulite is endowed with multifunctionality by coating the hydrophobic spherulite with a drug layer; and according to the Janus composite material containing the hydrophobic material, a hydrophilic layer is arranged on the surface of one side of the hydrophobic composite material, so that the Janus hydrophilic layer is convenient for water vapor adsorption, the hydrophobic layer improves the concentration gradient of the water vapor, and directional conveying of the water vapor is realized.
Owner:TIANJIN UNIV
Application of scar removing and prevention and control combined solution
PendingCN111358940AImprove immunityGrowth inhibitionAnthropod material medical ingredientsPeptide/protein ingredientsWound healingBlood capillary
The invention discloses application of a scar removing and prevention and control combined solution. The combined solution is used for inhibiting generation of scars and removing the scars. The combined solution comprises a mixed solution I for promoting blood circulation to remove blood stasis and melting and decomposing scar tissues, a mixed solution II for disinfecting, diminishing inflammation, astringing and promoting tissue regeneration, and a mixed solution III for activating capillary recovery and promoting collagen regeneration. By the combined solution, scar removing and scar prevention can be implemented simultaneously, and both symptoms and root causes are treated; on one hand, the combined solution has the characteristics of strong targeting and strong force in scar removing,and the effects of softening, reducing and smoothing the scars are more obvious than those of a traditional scar removing product; and on the other hand, the combined solution inhibits excessive proliferation of fibrous protein of a wound on which a scar is forming, promotes orderly growth of tissues, promotes wound healing, and effectively controls generation of the scars.
Owner:深圳爱思得美容科技有限公司
Strip-shaped tissue culture seedling inoculation device
ActiveCN111903516AQuality improvementReduce manufacturing costProgramme-controlled manipulatorPlant tissue cultureEngineeringSeedling
The invention relates to the technical field of tissue culture seedling planting, and discloses a strip-shaped tissue culture seedling inoculation device. The strip-shaped tissue culture seedling inoculation device comprises a workbench, a visual detection unit, a stem segmentation unit, a to-be-grafted seedling pickup unit and an inoculation unit, wherein the workbench is provided with a cuttingarea and an inoculation area; the visual detection unit and the stem segment segmentation unit are both mounted in the cutting area of the workbench; the stem segmentation unit is located below the visual detection unit, and the to-be-grafted seedling pickup unit comprises a first manipulator and a tissue culture seedling pickup mechanism; the first mechanical arm is mounted on the workbench, thetissue culture seedling pickup mechanism is mounted on the first mechanical arm, and the inoculation unit comprises second mechanical arms and inoculation handles; and the second mechanical arms are mounted on the workbench, and each inoculation handle is mounted on the corresponding second mechanical arm. The strip-shaped tissue culture seedling inoculation device has the beneficial effects thatthe inoculation work of strip-shaped tissue culture seedlings can be automatically completed, the labor intensity of workers is reduced, the number of operators is reduced, and the production cost issaved for enterprises.
Owner:SOUTH CHINA AGRI UNIV
String bean plantation method
InactiveCN109104931AFully disinfectedEnhanced overall recoverySeed and root treatmentFabaceae cultivationDiseaseInsect
The invention discloses a string bean plantation method, and belongs to the field of agricultural plantation. The string bean plantation method comprise following steps: seed pretreatment, sowing seedling growing, soil preparation fertilization and seedling transplanting, field management, and harvesting. The string bean plantation method is different from conventional trellis building method, trellis is prepared from plastic rods or metal rods instead of bamboo poles or wood rods, can be recycled, and can be inserted into soil directly every year in using, and complex trellis building processis avoided; a triangular pyramid structure is formed, so that trellis stability is increased; short rods are adopted, so that ordered growth of string bean vines is realized, it is convenient for string bean harvesting, string bean harvesting efficiency is increased, and string bean disease resistance and insect resistance are improved.
Owner:绩溪县桐坑源家庭农场
Method for constructing three-dimensional engineered nerve tissue, three-dimensional engineered nerve tissue and application thereof
PendingCN110862966AOrderly growthGood biocompatibilityCulture processNervous system cellsMatrigelNeurosphere
The invention relates to a method for constructing three-dimensional engineered nervous tissue, the three-dimensional engineered nervous tissue and an application thereof. Process. The method comprises the following steps: 1, carrying out isolated culture on animal neural stem cells; 2, applying a physiological electric field; subculturing the neural stem cells isolated and cultured in the step 1to the fifth generation, centrifuging neural spheres with a diameter of 100-200 microns for later use, pre-melting matrix gel Matrigel on ice for later use, and continuously applying a physiological electric field to stimulate for 7-14 days through physiological electric field application equipment for 1-2 hours every day; 3, optimizing a culture solution suitable for engineering nerve tissue growth: adding 1 / 50 of B27, 1 / 100 of N2, 10-20 ng / ml of bFGF and 1% of fetal calf serum into DMEM / F12; and 4, applying the physiological electric field for 7-14 days to obtain the three-dimensional engineered nervous tissue. The technical problems that in the application process of neural tissue engineering, the number of neuronal differentiation of existing neural stem cells is extremely small, and neurite cannot be induced to grow orderly in a three-dimensional growth environment to form a developed neural network are solved.
Owner:JILIN UNIV
Method for producing low-sodium salt from potassium-rich brine
PendingCN113185047ANo need to manually addUniform particle sizeMultistage water/sewage treatmentWater/sewage treatment by heatingPhysical chemistryPotassium
The invention discloses a method for producing low-sodium salt from potassium-rich brine, which comprises the following steps: sequentially carrying out purification and impurity removal, primary evaporation and concentration and solid-liquid separation to obtain sodium chloride and low-sodium salt raw material brine, carrying out secondary evaporation and concentration on the low-sodium salt raw material brine, and carrying out solid-liquid separation to obtain sodium chloride and high-temperature feed liquid; and carrying out gradient step-by-step cooling crystallization on the high-temperature feed liquid to obtain a low-sodium salt product. According to the method, high-content sodium chloride in the raw material mother liquor can be concentrated and separated out through two evaporation and concentration processes, a mechanical mixing mode is not adopted, but a physical evaporation crystallization mode is adopted, a natural low-sodium salt product can be directly obtained, uniform distribution of granularity is realized, a potassium-sodium layering phenomenon occurring in the transfer, storage and use processes is avoided, and the taste and the condition are better.
Owner:四川恒成钾盐科技有限公司
Preparation method of full-concentration gradient positive electrode material precursor, full-concentration gradient positive electrode material and preparation method of full-concentration gradient positive electrode material
PendingCN114291855AAvoid Compositional MismatchesOrdered layered structureCell electrodesSecondary cellsPhysical chemistryConcentration gradient
The invention discloses a preparation method of a full-concentration gradient positive electrode material precursor, a full-concentration gradient positive electrode material and a preparation method of the full-concentration gradient positive electrode material. The method comprises the following steps: (1) adding a nickel-poor solution into a nickel-rich solution to obtain a metal salt solution, adding the metal salt solution, a precipitator a and a complexing agent a into a base solution containing the precipitator and the complexing agent at the same time, and controlling the pH in a reaction system and the concentration of the complexing agent to be gradually reduced along with the reduction of the nickel concentration in the added metal salt solution; and (2) separating, washing and drying the product obtained in the step (1) to prepare the full-concentration gradient positive electrode material precursor with excellent crystallinity. And then preparing the full-concentration gradient positive electrode material with a lithium source. The positive electrode material inherits the excellent crystallinity of the precursor, has high nickel content, high specific discharge capacity and stable structure, is not easy to generate microcracks in the charge-discharge process, and avoids additional side reaction, so that the positive electrode material also has excellent cycle performance.
Owner:WANHUA CHEM (SICHUAN) CO LTD +1
A kind of graphene/polyaniline nanorod array composite material and its preparation method and application
ActiveCN105778088BOrderly growthImprove electrocatalytic activityLight-sensitive devicesSolid-state devicesAnilinePolyaniline composite
The invention discloses a preparation method of a graphene / polyaniline nanorod array composite material. The graphite oxide is dispersed in an acid solution and subjected to cell crushing and ultrasonic treatment to obtain a graphene oxide dispersion; then the aniline monomer solution is added to the In the graphite oxide dispersion, stir evenly at -5 to -10°C; then add the acid solution of ammonium persulfate, continue to stir and react at -5 to -10°C for 20 to 24 hours, and filter to obtain graphite oxide / polyaniline Nanorod array composite; reduction to obtain graphene / polyaniline nanorod array composite. The graphene / polyaniline nanorod array composite material can be used to prepare a counter electrode of a dye-sensitized solar cell. The invention realizes the orderly growth of polyaniline on the surface of graphite oxide. Based on the good electrocatalytic activity of polyaniline and the excellent electrical conductivity of graphene, the graphene / polyaniline nanorod array composite has high electrocatalytic activity and electrical conductivity at the same time. Sex, and the preparation process is simple, low cost.
Owner:QINGDAO UNIV
A kind of self-generated regeneration and repair ointment of wound surface tissue and its preparation method
ActiveCN110680832BOrderly growthPromote healingHydroxy compound active ingredientsInorganic phosphorous active ingredientsHuman bodyNervous system
A self-derived regenerative repair ointment for wound surface, characterized in that it is composed of the following raw materials in parts by weight: 10-40 parts of regenerative medical materials, 5-20 parts of polyethylene glycol 4000, 30-80 parts of polyethylene glycol 400 5-25 parts of glycerin, 0.5-3 parts of medical-grade vitamin E oil, by mixing regenerative medicine materials, polyethylene glycol, glycerin and medical-grade vitamin E oil in a specific way, it can reach the guiding cell , extracellular matrix, blood vessels and other tissues crawling and replacing in an orderly manner, accelerate wound healing, repair the nervous system of the wound synchronously, realize the orderly growth of new tissue fiber layers, regenerate capillaries and hair follicles, and realize the endogenous tissue of the wound Regenerate and repair, inhibit scar formation. At the same time, the pH value of the mixture is 7.3-7.8, which is relatively close to the pH value of the human body. It is less irritating to the human body during use, thereby reducing the pain of patients.
Owner:北京幸福益生高新技术有限公司
A kind of hydrophobic spherulite, hydrophobic material, hydrophobic composite material, janus composite material and preparation method and application thereof
ActiveCN112900081BLarge specific surface areaImprove hydrophobicityBiochemical fibre treatmentLayered productsMicro nanoNano structuring
The present invention provides a hydrophobic crystal, hydrophobic material, hydrophobic composite material, Janus composite material and its preparation methods and applications.The structure includes micron -level crystal nucleus and nano -grade whiskers growing on the surface of the crystal nucleus; among which the hydrophobic crystal is a micro -nano structure formed by hydrophobic substances.It has better hydrophobic performance and appropriate filtration efficiency; hydrophobic materials give hydrophobic sparse crystal multifunctional properties by covering a hydrophobic sparsal crystal;The water layer makes the janus water -proof layer facilitating water vapor adsorption. The hydrophobic layer increases the concentration gradient of water vapor and realizes the directional conveying of water vapor.
Owner:TIANJIN UNIV
A strip-shaped tissue culture seedling inoculation device
ActiveCN111903516BQuality improvementReduce manufacturing costProgramme-controlled manipulatorPlant tissue cultureAnimal scienceRobot hand
Owner:SOUTH CHINA AGRI UNIV
A kind of electroless palladium plating liquid, its preparation method and its use method and application
ActiveCN108823554BOrderly growthSolve easy precipitationLiquid/solution decomposition chemical coatingChemical platingMaterials science
Owner:深圳市化讯半导体材料有限公司
A kind of reducing electroless gold plating liquid and its preparation method and use method and application
ActiveCN108823555BOrderly growthAvoid the phenomenon of precipitationLiquid/solution decomposition chemical coatingElectroless platingReducing agent
Owner:深圳市化讯半导体材料有限公司
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