182results about How to "Realize large-scale production" patented technology

The invention discloses a recombinant humanized XVII type collagen as well as an expression vector and a genetically engineered bacterium thereof. Four functional fragments with high activity are obtained through screening, one of the fragments is optimized and then combined according to a certain sequence to obtain recombinant humanized XVII type collagen JYC1703, or one of the fragments is optimized and then combined according to a certain sequence, and GPP sequences are fused at an amino terminal and a carboxyl terminal respectively to obtain recombinant humanized XVII type collagen JYC1701 and JYC1702, and the recombinant humanized XVII type collagen JYC1701 and JYC1702 are combined according to a certain sequence to obtain the recombinant humanized XVII type collagen JYC1701 and JYC1702. After codon optimization, amplifying and cloning into an expression vector, transforming into pichia pastoris competent cells after enzyme digestion linearization, and screening high-copy recombinants through G418 resistance gradient, so as to obtain pichia pastoris genetically engineered bacteria for expressing recombinant humanized XVII type collagen. The recombinant humanized XVII type collagen JYC1701, JYC1702 and JYC1703 disclosed by the invention show excellent functions of promoting cell adhesion, cell proliferation and cell migration, and are suitable for preparing products such as skin care products or medical instruments and the like.

The invention relates to the field of electrolyte, and provides a lithium borohydride-lithium iodide composite solid electrolyte material as well as a preparation method and application thereof. The preparation method comprises the following steps: A, adding lithium borohydride into a solvent anhydrous tetrahydrofuran for dissolving, and then adding lithium iodide to form a uniform solution; b, transferring the solution into a closed container, and removing the solvent in vacuum until the solution is converted into a solid; and carrying out heating heat treatment to obtain the composite solid electrolyte material. According to the method, a liquid phase method is adopted, lithium borohydride is firstly added into an anhydrous tetrahydrofuran solvent, then anhydrous lithium iodide is added into the anhydrous tetrahydrofuran solvent, and trace water in tetrahydrofuran is removed by using lithium borohydride, so that the sample purity is ensured, and the ionic conductivity of the material is improved. The invention also provides an application of the lithium borohydride-lithium iodide composite solid electrolyte material in an all-solid-state battery.

The invention discloses a preparation method of a rapidly-cured expanded graphite-based fuel cell composite bipolar plate, which comprises the following steps: cutting soft cut carbon fiber foam with a three-dimensional structure into the size of the bipolar plate, immersing into liquid resin for 10-30 minutes, and drying in a vacuum drying oven at 25-40 DEG C; and putting the pre-cold-pressed expanded graphite as a top layer and a bottom layer of the bipolar plate into a mold under the pressure of 10-15 Mpa, putting the soft cut carbon fiber foam resin into a middle layer, heating to 90-150 DEG C under the pressure of 10-15 Mpa, keeping for 110 seconds to 58 minutes, and demolding to obtain the composite bipolar plate of the fuel cell. The hot press molding method is simple, the plane conductivity of the prepared bipolar plate reaches 375.8 S / cm, the maximum bending pressure reaches 88.53 N, the bending strength is 61 Mpa, the air tightness is 2.32 * 10 <-8 > cm < 3 > cm < 2 > s <-1 >, the water contact angle is 92 degrees, the corrosion-resistant current is 0.345 mu A / cm < 2 >, and large-scale production can be achieved.

The invention belongs to the technical field of battery recovery, and particularly relates to a disassembling method for taking out a battery cell from a decommissioned power battery pack, which comprises the following steps of: 1, selecting an ethyl acetate solvent, 2, uniformly punching a sealing plate of the battery pack, establishing a solvent immersion channel through which the ethyl acetate solvent can pass, and taking out the battery cell from the decommissioned power battery pack. 3, injecting an ethyl acetate solvent into the solvent immersion channel, and sealing and infiltrating to swell the structural adhesive in the battery pack, 4, uncovering the sealing plate, and removing the swelled structural adhesive, and 5, taking out the battery cell. According to the invention, the battery cell can be efficiently and safely taken out from the retired power battery pack, and meanwhile, the damage to the battery cell is reduced as much as possible, so that the echelon utilization of the battery cell is realized, the recycling rate of resources is improved, the environmental pollution is reduced, and the requirement of sustainable development is met.

The invention aims at disclosing a magnesium hydride continuous production device and process, and relates to the technical field of magnesium hydride preparation, the magnesium hydride continuous production device comprises a sealing shell, a heating inner container, a power assembly, a feeding assembly, a discharging assembly, an inert gas replacement assembly and a hydrogenation inlet; the heating inner container comprises a side wall, a feeding end and a discharging end, a plurality of gas one-way valves are arranged on the side wall, a spiral propeller, a plurality of steel balls and / or a plurality of steel bars are arranged in the heating inner container, and a filter screen is arranged at the discharging end; a conical part and a recycled material port are arranged at the bottom of the sealed shell; the feeding assembly comprises a feeding lock hopper and a feeding pipe, and the feeding pipe communicates with the feeding end. The discharging assembly comprises a discharging pipe and a discharging lock hopper, and the discharging pipe is communicated with the discharging end; the method has the technical effects that the particle size of the magnesium powder is 10-300 microns, the particle size of the produced magnesium hydride is 50-800 nm, continuous feeding, continuous reaction and continuous discharging can be realized, large-scale production of the magnesium hydride is realized, and the hydrogen storage density of the magnesium hydride is not less than 7 wt%.

The invention provides a construction method of recombinant escherichia coli for synthesis of ergothioneine, a strain and application of the strain, and relates to the technical field of construction of strains related to synthesis of ergothioneine, an NcEgt1 * sequence and an Egt D * sequence are fused and connected with a ribosome binding site sequence, and after XbaI and NotI enzyme digestion, the mixture is connected to a carrier pET-Duet-1 to obtain a recombinant plasmid pET-Duet-1-NcEgt1 *-EgtD *; the EgtE is connected to a recombinant plasmid pET-Duet-1-NcEgt1 *-EgtD * through Nd < e > I / KpnI enzyme digestion, and finally a recombinant vector pET-Duet-1-NcEgt1 *-EgtD *-EgtE is obtained; the method comprises the following steps: transforming a recombinant vector pET-Duet-1-NcEgt1 *-EgtD *-EgtE into E.coli BL21 to obtain a bacterial strain for producing ergothioneine, and naming the bacterial strain as E.coli Egt116; then, the recombinant plasmid pRSFDuet-1-EgtD *-EgtE is converted into a bacterial strain E.coli Egt116, and a bacterial strain E.coli Egt117 capable of producing ergothioneine is obtained; and finally, constructing a mutant strain of double genes of the strain Ecoli Egt117sdaA / MetJ by using a Cre-lox system, naming the mutant strain as E.coli Egt118, and increasing the ergothioneine yield of the strain to 218.71% in comparison with the ergothioneine yield of the strain E.coli Egt116. The recombinant strain constructed by the invention can be used for mass production of the ergothioneine, and large-scale production of the ergothioneine is realized.

The invention discloses a preparation method and application of a sulfur-doped metal monatomic loaded porous carbon material. Metal ions and sulfonic acid groups are utilized to form stable coordination bonds, the stable coordination bonds are confined in a zeolite imidazole-8 three-dimensional network porous structure, and the sulfur-doped metal monatomic loaded porous carbon material is obtained through pyrolysis. The material is in a dodecahedron shape, the particle size is 100-1000 nm, and the mass percent of metal monatomic is 0.1%-10%. In addition, the electronic structure of the active site of the catalyst is adjusted through sulfur doping, the monatomic adsorption and catalysis capability is improved, polysulfide shuttling is relieved, the electrode conversion reaction kinetics is improved, and the high-performance lithium-sulfur battery is achieved.

The invention belongs to the technical field of pharmaceutical preparations, and particularly relates to a pharmaceutical composition containing Bremelinodan, a preparation as well as a preparation method and application of the pharmaceutical composition. The pharmaceutical composition provided by the invention comprises a pharmaceutical active ingredient Bramer nodan, a solvent and a polymer, and the solvent comprises one or more of N-methyl pyrrolidone, polyethylene glycol, dimethyl sulfoxide and benzyl benzoate. According to the pharmaceutical composition containing the Bramer captan, the blood concentration of the Bramer captan is stably larger than 0.1 ng / mL within 120-168 h, target slow release is achieved, direct injection can be achieved, liquid medicine does not need to be mixed before use, the preparation process is simple, the component is single, a thickening agent, a gel forming agent or other auxiliary materials do not need to be added, large-scale production can be achieved, cost is low, and the pharmaceutical composition is suitable for industrial production. Good market application prospects are realized.

The invention discloses a probiotic crystal ball production device and a probiotic crystal ball, and belongs to the field of biological pharmacy, the probiotic crystal ball production device comprises a storage tank, a titration pumping module, a first tank body and a second tank body, the titration pumping module is communicated with the storage tank, the first tank body is provided with a feeding port and a discharging port, and the second tank body is communicated with the storage tank; the outlet end of the titration pumping module penetrates through the feeding hole and extends into the first tank body; a liquid supplementing pipe is further arranged on the first tank body; a feeding pipe is arranged at the top of the second tank body, a discharging pipe is arranged at the bottom of the second tank body, and the feeding pipe is connected with the discharging opening of the first tank body; a spiral generating device used for generating spiral water flow is arranged in the second tank body, and the discharging pipe is further connected with a separating device; primary hardening is achieved through the first tank body, a protective film is formed on the surface of liquid drops, then the semi-hardened liquid drops are driven to rotate through intermolecular acting force and spiral water flow in the second tank body, the liquid drops are gradually hardened into crystal balls, the roundness and production efficiency of the crystal balls can be effectively improved, and the cleanliness of the technological process is guaranteed.

The invention relates to the field of inorganic nano composite materials, and provides a preparation method of a nitrogen-doped carbon nanotube wave-absorbing material filled with Fe7S8-FeS2. The method aims at solving the technical problems that the dielectric regulation and control mechanism of a transition metal sulfide wave-absorbing material is not clear, the electromagnetic wave absorption frequency band is narrow, and the absorption strength is low. According to the main scheme, the method comprises the following steps: dissolving dicyandiamide and ferric chloride in deionized water, and heating and drying to obtain red powder; annealing the powder to obtain Fe / nitrogen-doped carbon nanotube black powder; after mixing with sulfur powder, annealing again to obtain Fe7S8 / nitrogen-doped carbon nanotube black powder; and finally, mixing and annealing with sulfur powder to obtain the Fe7S8 / FeS2 filled nitrogen-doped carbon nanotube wave-absorbing material. The material shows excellent absorption strength and absorption bandwidth under the condition of low thickness (1.6 mm), the maximum reflection loss is-36.83 dB, and the effective absorption bandwidth is 5.14 GHz (11.9-17.04 GHz). The invention also provides application of the material, namely the material is used as a wave-absorbing material, and is mixed with paraffin or epoxy resin and then coated on the surface of a protected object.

The invention discloses a sodium ion button type half cell and also discloses a preparation method of the button type half cell, and the preparation method comprises the following steps: cleaning and drying amygdalus pedunculata shells, crushing the amygdalus pedunculata shells, and sieving the amygdalus pedunculata shells with a 100-mesh sieve to obtain amygdalus pedunculata shell powder; removing impurity ions in the powder by using excessive hydrochloric acid, filtering out the hydrochloric acid, and cleaning and drying the powder; carrying out cell disruption on the powder, freezing and then freeze-drying; carbonizing the obtained powder in an Ar atmosphere to obtain an amygdalus pedunculata shell-based hard carbon material; preparing a negative plate by taking the hard carbon material as a negative electrode material; the negative plate is used as a negative electrode, a sodium plate is used as a positive electrode, a glass fiber diaphragm is adopted, and a sodium ion button half cell is assembled; and carrying out sodium ion accelerated desolvation treatment on the assembled button type half cell to obtain the sodium ion button type half cell. The button half cell has the characteristics of high reversible capacity and high first-cycle coulombic efficiency.

The invention discloses a preparation method of in-situ esterified nano cellulose fibrils based on plant straws. Comprising the following steps: mixing deionized water, plant straw powder and a biological compound enzyme preparation, and carrying out enzymatic reaction on the mixed solution to obtain enzyme-pretreated plant straw powder; mixing a deep eutectic solvent with the enzyme-pretreated plant straw powder, and carrying out a dissociation-in-situ esterification reaction on the mixed solution to obtain in-situ esterified holocellulose; mixing deionized water, in-situ esterified holocellulose and an oxidizing agent, carrying out oxidation reaction on the mixed solution, and carrying out suction filtration on the reaction solution to obtain in-situ esterified cellulose; and carrying out mechanical treatment on the aqueous dispersion of the in-situ esterified cellulose to obtain the in-situ esterified nanocellulose fibrils. According to the present invention, the multi-dimensional co-treatment preparation technology integrating biological pretreatment, in-situ chemical modification and mechanical dissociation is adopted, such that the in-situ esterified cellulose fibril can be rapidly, efficiently and environmentally-friendly prepared, the prepared nano cellulose fibril has characteristics of high purity, uniform size and high stability, and the large-scale production can be achieved.

The invention relates to a coherent dual-phase type sodium ion battery layered oxide positive electrode material and a preparation method thereof. The structural general formula of the positive electrode material is Na < x > MaO < 2 > (at) Na < 0.8 > MbO < 2 >, xlt; 1; 0 lt; a < = 1; 0 lt; b < = 1; wherein M is selected from at least one of Ni, Mn, Fe, Co, Cu, Ti, V, Cr, Mg, Zn, K, Al, Ca, Mo, Ru, Nb, Ir and Zr. The coherent double-phase layered positive electrode material provided by the invention is simple and controllable in preparation process, low in raw material cost, mild in reaction condition and capable of realizing large-scale production.

The utility model discloses a production system for synthesizing a humic acid zeolite-based slow-release ecological fertilizer from coal-based organic waste and fly ash waste. The system comprises a first unit, a second unit and a third unit, wherein the first unit is used for separating modified lignin similar to humic acid substances; the second unit is positioned at the downstream of the first unit and is used for converting the modified lignin of the first unit into artificial humic acid; the third unit is positioned at the downstream of the second unit and is used for catalyzing hydrothermal humification synthesis of the artificial humin; the fourth unit is positioned at the downstream of the third unit and is used for catalyzing hydrothermal carbonization; and a fifth unit upstream of the first unit for preparing an additive in the first unit and / or the third unit and / or the fourth unit. According to the utility model, links of feeding pretreatment of main solid waste raw materials of two coal electric boilers, processing production of the materials, loading of mineral nutrients, synthesis production of composite materials and the like are integrated into a continuous technological process of an integrated production line.

The invention discloses a membrane-aerogel composite tubular tissue engineering scaffold mold and a preparation method thereof, the membrane-aerogel composite tubular tissue engineering scaffold mold comprises a plurality of shelves, a plurality of struts, a plurality of gaskets, a middle core column and a hollow transparent tube, the struts are used for supporting the shelves; at least one annular gasket groove is coaxially formed in each layer of shelf and is used for fixing the gasket; the middle core column is fixed through the middle core column positioning holes of the upper gasket and the lower gasket; and the hollow transparent tube is fixed through the transparent tube positioning hole of the middle gasket and the transparent tube positioning groove of the lower gasket. The invention further discloses a preparation method of the membrane-aerogel composite tubular tissue engineering scaffold, the mold is adopted, accurate axis matching of the inner-layer tubular fiber membrane and the outer-layer tubular aerogel is achieved, and therefore the stability and integrity of the overall structure are guaranteed, and long-term storage is facilitated.

The application discloses a large-scale electronic-grade hydrogen purification system and process, and belongs to the technical field of gas separation. The process implemented by the large-scale electronic-grade hydrogen purification system comprises the following steps: raw gas enters a first normal-temperature pressure swing adsorption device under a set pressure, and high-purity hydrogen is continuously produced through pressure swing adsorption under normal-temperature conditions; the hydrogen enters a temperature swing adsorption device to remove residual moisture in the hydrogen, and high-quality hydrogen meeting the electronic-grade hydrogen standard is obtained; desorption gas of the first normal-temperature pressure swing adsorption device and regeneration waste gas of the temperature swing adsorption device are compressed and then enter a second normal-temperature pressure swing adsorption device to be further concentrated, and product gas crude hydrogen is obtained; the crude hydrogen is mixed with the raw gas and is sent into the first normal-temperature pressure swing adsorption device. The application is ingenious in conception and scientific in design, and realizes large-scale production of electronic-grade hydrogen through a two-stage pressure swing adsorption coupling drying process.

The invention belongs to the technical field of synthesis of extraction agents, and particularly relates to a preparation method and application of amido diphosphinic acid. The preparation method comprises the following steps: (1) mixing a solvent, primary amine, cyclohexylphosphinic acid and inorganic acid, and heating until the solution is clear and transparent; (2) adding a formaldehyde solution or paraformaldehyde into the clear and transparent solution for reaction; and (3) removing a water phase from the mixture obtained after the reaction in the step (2) is finished, dissolving jelly obtained after the water phase is removed by using dichloromethane, and carrying out washing, rotary evaporation and drying to obtain the amido diphosphinic acid.

The invention discloses a preparation method of a methylcellulose-based oxygen reduction electrocatalyst, and belongs to the technical field of catalysts. The invention aims to solve the problems that the characteristic that existing cellulose is easy to agglomerate is not beneficial to uniform dispersion of metal and formation of a porous structure, and the development of the cellulose in the field of catalysis is limited. The method comprises the following steps: 1, adding a metal precursor, a coordination precursor, a salt template and methyl cellulose into hot water, stirring and dispersing, stirring in an ice-water bath until the solution becomes thick, freezing into a solid, and finally freeze-drying; 2, high-temperature calcination; and 3, grinding, centrifugally washing and drying. The method is used for preparing the methyl cellulose-based oxygen reduction electrocatalyst.

The invention discloses a traditional Chinese medicine tea drink for preventing and treating oral mucosa diseases and a preparation method of the traditional Chinese medicine tea drink. The traditional Chinese medicine tea drink is prepared from 10-15 parts of radix astragali, 8-12 parts of radix codonopsis, 6-10 parts of radix salviae miltiorrhizae, 5-9 parts of radix angelicae sinensis, 3-6 parts of fructus psoraleae, 6-9 parts of rhizoma polygonati, 6-9 parts of radix adenophorae, 6-10 parts of rhizoma atractylodis macrocephalae, 5-9 parts of radix ophiopogonis, 3-5 parts of radix glycyrrhizae, 4-6 parts of pericarpium citri reticulatae and 5-8 parts of herba taraxaci. Aiming at the core pathogenesis of low immunity, long-term deficiency, long-term deficiency and kidney-yang insufficiency of patients suffering from oral mucosa diseases, qi tonifying, blood activating and kidney-qi strengthening are taken as a core treatment method, the formula is scientific and reasonable, all the medicinal materials act synergistically, the overall immune function of the body is adjusted, T lymphocyte subpopulation imbalance and cell factor network disorder are improved, and the curative effect is good. The oral mucosa microcirculation is improved, local inflammation is relieved, the immunity of a patient is improved fundamentally, the recurrence rate of oral mucosa diseases is reduced, and the problems that an existing tea drink is not high in pertinence and limited in curative effect are solved. The tea drink is appropriate in taste, good in compliance, high in safety and suitable for people with various oral mucosa diseases and low immunity.

The patent relates to the technical field of tobacco, and particularly relates to a conveying system for a paper-process sheet drying oven and the paper-process sheet drying oven. The conveying system comprises a conveying device, a first deviation rectifying device and a second deviation rectifying device. The first deviation rectifying device and the second deviation rectifying device are both used to provide displacement in a deviation rectifying direction to the conveying belt, the deviation rectifying direction is perpendicular to the length direction of the conveying belt, the distance between the first deviation rectifying device and the end driving roller is not greater than 10%, 20% or 25% of the length direction size of the transmission assembly, and the second deviation rectifying device is arranged substantially symmetrically to the middle line of the transmission assembly in the length direction of the first deviation rectifying device. The patent can better solve the deviation problem of the conveying belt, save labor cost, improve production efficiency and reduce the labor intensity of the operator. The deviation rectifying frequency of the first deviation rectifying device and the second deviation rectifying device is lower during the working process, and the first deviation rectifying device and the second deviation rectifying device are more suitable for deviation rectifying of long-distance belt conveying systems and have a longer service life.

The invention relates to the technical field of saccharide purification, in particular to a high-yield and low-color-value anhydrous beta-lactose preparation method which comprises the following steps: preparing a lactose solution by taking food-grade lactose as a raw material, adding activated carbon for adsorption, then carrying out column treatment to remove nitrogen-containing inorganic salt and organic acid, and finally carrying out film evaporation concentration to separate out beta-lactose crystals. The method comprises the following steps of: adding anhydrous beta-lactose into a reaction kettle, automatically scraping off crystals, and collecting to obtain anhydrous beta-lactose, the yield of the anhydrous beta-lactose is at least 90wt%, and the color value is lower than 25. According to the method, the yield of the beta-lactose can be improved, and the produced beta-lactose is uniform in particle size, normal in color and few in impurities.

The invention discloses a preparation method of a micron-sized hexagonal iron / graphene composite wave-absorbing material, and relates to the technical field of preparation of electromagnetic wave absorbing materials. The invention aims to solve the key technical problems of impedance mismatch and weak attenuation capability caused by high conductivity and high dielectric property of graphene. The method comprises the following steps: inducing the generation of anisotropic morphology by taking metal cations as a precursor and hexadecyl trimethyl ammonium bromide as a surfactant, mixing graphene oxide with the metal cations and the surfactant, carrying out hydrothermal reaction and freeze-drying processes, and carrying out heat treatment in a reducing gas atmosphere to prepare the iron / graphene composite material. According to the invention, dielectric parameters of graphene are regulated and controlled by using a strategy of compounding an anisotropic magnetic material and graphene, so that impedance matching is improved, and a dielectric-magnetic loss mechanism is developed to improve the attenuation capability. The hexagonal iron / graphene composite wave-absorbing material prepared by the method is applied to the field of electromagnetic wave absorbing materials.

The invention provides a silicon nanowire and a preparation method and application thereof. The preparation method comprises the following steps: carrying out first evaporation on a silicon source to obtain silicon source steam, carrying out second evaporation on alloy ABx to obtain alloy steam, mixing the silicon source steam with the alloy steam, and reacting to obtain the silicon nanowire, wherein A is a reducing agent element and is selected from any one or a combination of at least two of Al, Mg or Zn, B is a catalyst element and is selected from any one or a combination of at least two of Au, Ag, Cu, Co, Ni, Fe, Ti, Nb, Sn, Al or Zn, and x is larger than or equal to 0.0001 and smaller than or equal to 3. The silicon nanowire is prepared in an alloy form, and the preparation process is simple and easy to control.

The invention belongs to the related technical field of intelligent sportswear, and particularly relates to a solar AI intelligent sportswear, which comprises an outdoor jacket main body, at least three flexible amorphous silicon film power generation modules, an energy management module, an energy storage unit, an electricity load and a flexible conductive circuit for interconnecting the flexible amorphous silicon film power generation modules, the energy management module, the energy storage unit and the electricity load. The flexible amorphous silicon film power generation modules are optimally arranged in high-sunlight areas such as the rear of the brim and the shoulders and are combined with the garment through the hot-pressing composite technology, sewing needle holes are avoided, the original elasticity, soft touch feeling and appearance smoothness of the garment are kept, and the service life of the garment is prolonged. The non-sensibility of the power generation function and the non-destructive effect of the clothes movement function are realized; according to the power generation module, ETFE / PI'sandwich 'packaging and ultrasonic welding edge sealing are adopted, and a waterproof moisture-permeable hot melt adhesive composite technology is matched, so that multi-layer protection is jointly formed.

The invention discloses a polymer-MXene-polymer heterostructure nanosheet and a preparation method thereof, and belongs to the technical field of two-dimensional metal materials. According to the method disclosed by the invention, after the template agent and the reaction solvent are mixed, the two-dimensional MXene nanosheet and the resin are sequentially added for a polymerization reaction, then calcination treatment is carried out, in the preparation process, the resin is converted into carbon, the carbonization degree can be controllably adjusted through the reaction temperature, and the preparation process is simple. According to the method, a two-dimensional structure and a single-layer porous structure can be integrated into one hybrid material, and the method is simple and easy to implement, high in yield and high in yield and can realize large-scale production.

The invention discloses ultra-microporous synergistic powder for tank mixing of pesticides as well as a preparation method and application of the ultra-microporous synergistic powder, and belongs to the technical field of functional auxiliary agents of the pesticides. The powder takes a natural porous material as a raw material, is prepared through raw material pretreatment, inert atmosphere high-temperature calcination activation, superfine grinding and homogeneous compounding, and contains 85-98% of superfine porous powder, 1-10% of a dispersing agent and 1-5% of a wetting penetrant. The key of application is that the barrel mixing sequence of diluting the pesticide and then adding the powder is adopted, the adding amount is 1%-5% of the total weight of the pesticide liquid, the powder can efficiently adsorb effective components of the pesticide, and the light stability and the lasting period of the pesticide are remarkably improved through the ultraviolet shielding effect and the adsorption-desorption slow release effect of the ultra-micropore structure. The product and the using method are specially designed for terminal users, operation is easy and convenient, and efficiency is remarkable.

The application provides a layered preparation method and system of a diamond heat sink sheet, and the method comprises the following steps: preparing a crystal direction anchoring microstructure on a growth surface of a substrate and a moment buffer layer on a non-growth surface; obtaining a first layer of diamond through crystal direction anchoring, and generating a reverse moment on the growth surface through the moment buffer layer; removing surface defects on the diamond surface to form an atomic level step; depositing a liquid metal on the atomic level step for stress release, and then removing the liquid metal; continuously growing a second layer of diamond, and accurately controlling the stress state of the second layer of diamond; and cooling to obtain a crack-free diamond heat sink sheet. Through the synergistic process design of the diamond layering construction and the reverse moment buffer, the application blocks the path of stress accumulation and crack initiation and expansion, effectively solves the cracking problem in the preparation process of the diamond heat sink sheet, balances the process feasibility and the product performance stability, greatly improves the yield and the structural integrity of the diamond heat sink sheet, and reduces the production cost.

The invention relates to a preparation method of a nitrogen-doped porous graphene self-assembled carbon nanotube potassium ion battery negative electrode material, and belongs to the technical field of potassium ion battery preparation. Due to strong pi-pi interaction between graphene sheet layers, graphene tends to be stacked again to form graphite-like powder or a thin film, so that the specific surface area and the ion diffusion rate can be seriously reduced, and extremely poor reversible specific capacity, rate and cycle performance are shown in practical application. Therefore, the invention designs the nitrogen-doped porous graphene self-assembled carbon nanotube potassium ion battery negative electrode material. The preparation method is characterized in that graphene oxide is used as a raw material, and a series of nitrogen-doped porous graphene self-assembled carbon nanotube potassium ion battery negative electrode materials are prepared by adopting a strong oxidant pore forming method, a heteroatom doping method and a hydrothermal method. The negative electrode material has good structural stability, cycle performance and rate capability, and a new thought is provided for design and development of an advanced carbon negative electrode material. The negative electrode material prepared by the process has a three-dimensional interconnected porous morphology, abundant doping defects and a nanopore structure, and can solve the problem of poor cycle performance of a traditional carbon material.

The embodiment of the present invention discloses an amorphous calcium phosphate gel and a preparation method and application thereof. The method comprises: adding aminomethyl propanol to a propylene glycol solution containing a calcium source to obtain a mixed solution; slowly adding a phosphoric acid solution to the mixed solution to obtain an amorphous calcium phosphate gel. The amorphous calcium phosphate gel provided by the present invention has excellent stability, and no obvious phase change occurs after being placed at room temperature for 12 months; no toxic or harmful reagents are used in the preparation process, the production process is safe and environmentally friendly, and the safety of the product is also guaranteed; the method and process are simple, and the large-scale production of the product can be realized, providing a basis for the wide application of amorphous calcium phosphate gel in oral care.