482results about How to "Reduce precipitation" patented technology

The invention discloses low-alkali solid waste cementing material-based plant-growing concrete and a preparation method thereof. The vegetation concrete comprises a base layer framework and a surface layer material laid on the framework. Wherein the base layer framework is prepared from the following raw material components in parts by weight: 160 to 200 parts of low-alkali solid waste cement, 15 to 25 parts of phosphogypsum, 1380 to 2100 parts of mineralized concrete recycled aggregate, 62 to 102 parts of mineral admixture and 60 to 90 parts of mixing water. The surface layer material comprises the following raw material components: 1-5% of sodium alginate, 1-10% of calcium superphosphate, 1-10% of urea and the balance of soil. The mineralized concrete recycled aggregate is prepared by the following steps: soaking the concrete recycled aggregate in a diammonium hydrogen phosphate solution, and separating out the aggregate after soaking is completed, thereby obtaining the mineralized concrete recycled aggregate. According to the plant-growing concrete, alkalinity in concrete pores can be remarkably reduced, and the plant-growing concrete has stable later strength and good plant germination rate.

The invention relates to the technical field of microorganisms, in particular to a lactobacillus kefir-producing subsp. Kefir W182 and application thereof. The preservation number of the lactobacillus kefir-producing subspecies is CGMCC No.27058, the preservation time is April 11, 2023, and the lactobacillus kefir-producing subspecies can survive for a long time in intestinal tracts, has a strong adhesion characteristic, can produce exopolysaccharides at high yield, can be used for fermenting dairy products, fruit juice, fruit puree, soybean milk and the like, and can also be used for preparing leavening agents and natural thickening agents. Especially when applied to fermented milk products, the fermented milk products can have rich flavor and very good viscosity without adding any existing thickening agent and emulsifying agent, can remarkably reduce separation of whey, can be stored for a long time, and have wide application in the field of food.

The invention relates to the technical field of coating preparation, and particularly discloses a multifunctional composite filler modified water-based coating and a preparation method thereof.The water-based coating is prepared from, by weight, 80-100 parts of modified core-shell acrylic acid dispersoid, 5-7 parts of multifunctional composite filler, 0.5-1 part of defoaming agent, 0.5-1 part of wetting agent, 2-5 parts of thickening agent, 1-2 parts of coalescing agent and 25-35 parts of deionized water. The water-based paint provided by the invention is modified by adding a proper amount of multifunctional composite filler, the performance is excellent, the stability is good, the components in the water-based paint have good compatibility by optimizing the preparation process conditions of the water-based paint, and the preparation method is simple to operate and suitable for industrial production.

The invention relates to the technical field of material processing, and discloses a silicon-containing composition for processing a chlorine-containing polyolefin material and a preparation method, which are used for solving the problems of processing and extrusion of the chlorine-containing polyolefin composite material. The invention relates to a silicon-containing composition for processing a chlorine-containing polyolefin material. The silicon-containing composition comprises 5-95 parts of modified polysiloxane, 5-95 parts of hydrocarbon wax, 5-95 parts of fatty acid amide, 5-95 parts of metallic soap and 1-5 parts of other auxiliaries. The silicon-containing composition for processing the chlorine-containing polyolefin material is applied to processing and extrusion of the chlorine-containing polyolefin composite material, modified polysiloxane not only contains a plastic-loving part but also contains a filler-loving part, and meanwhile, the whole molecular structure takes organic silicon as a main chain, so that the special performance of the organic silicon is achieved; according to the present invention, the chlorine-containing polyolefin composite material is compounded with other lubricants so as to achieve efficient internal and external lubrication, high cost performance and no precipitation, can effectively delay the decomposition time of the chlorine-containing polyolefin, can weaken the adhesion effect between the chlorine-containing polyolefin and the metal, can substantially prolong the screw cleaning time during the processing of the chlorine-containing polyolefin composite material, and can improve the production efficiency.

The invention relates to the technical field of compositions, in particular to an anti-aging composition for increasing corium layer collagen and a preparation method of the anti-aging composition. Comprising the following steps: preparing sargassum fusiforme polysaccharide; preparing a composite sargassum fusiforme polysaccharide stabilizer; and compounding and preparing the traditional Chinese medicine extract. The anti-aging composition is prepared by compounding the balm extract, the pistacia chinensis extract, the mulberry extract, the collagen tripeptide and the sargassum fusiforme polysaccharide, all the components are properly compounded, the obtained anti-aging composition and oral liquid are not prone to precipitation in the storage process, loss of nutritional ingredients is avoided, and the anti-aging effect is good. According to the present invention, the components have the obvious synergistic effect, such that the collagen secretion can be promoted while the oxidative stress, the collagen degradation and the skin inflammation can be inhibited so as to substantially increase the collagen content of the skin corium layer, and the anti-aging effect on the skin can be effectively achieved.

The invention discloses an efficient sewage treatment device based on a magnetic separation technology, and relates to the technical field of sewage treatment, and the efficient sewage treatment device comprises a composite mechanism. According to the efficient sewage treatment device based on the magnetic separation technology, through the design of a composite mechanism, sewage enters the composite shell from a feeding pipe, impurities in the sewage are adsorbed through a filter plate, so that the effect of purifying the sewage is achieved, the contact area is increased by forming a plate surface groove and opening the groove, the filter effect is improved, and the service life of parts is prolonged; a first electric push rod controls an annular plate to rub a filter plate up and down in the composite shell, so that the effect of cleaning impurities on the surface is achieved, impurity precipitation is reduced, the rubbed impurities are precipitated towards an output mechanism, subsequent discharge from the output mechanism is facilitated, filtered sewage is discharged from a discharge pipe, and subsequent operation is facilitated.

The present invention relates to the technical field of power cable manufacturing, and discloses a low-smoke halogen-free flame-retardant polyolefin sheathed power cable. The power cable outer sheath composite material comprises the following raw materials: metallocene linear low-density polyethylene, ethylene-vinyl acetate copolymer, high-density polyethylene, flame-retardant additives, high-temperature resistant components, antioxidants, cross-linking agents, and lubricants; by improving the flame retardant and high-temperature resistant properties of the polyethylene material, the prepared power cable has excellent mechanical properties, toughness, flame retardant properties, and high-temperature resistant properties, can work continuously and stably in a high-temperature environment, reduce the occurrence of fire accidents, and effectively prevent the spread of fire even in the event of a fire, and does not generate toxic hydrogen halide gas and thick smoke during combustion.

The utility model discloses a fruit tree fertilizing device, which belongs to the technical field of fruit tree fertilizing devices and comprises a cart, and hub components are mounted at two ends of the bottom of the cart respectively. A bracket is mounted at one end of the trolley, and a positive and negative ball screw frame is arranged on the bracket; the two ends of the positive and negative ball screw frame are respectively connected with a fertilizer applying frame through a screw nut pair, and the fertilizer applying frame is semicircular; a plurality of groups of drainage holes are formed in the bottom end of the fertilizing frame at equal intervals. When the two fertilizing frames are close to each other and combined, the whole fertilizing frame is approximately circular, the purpose of fertilizing around the root of a fruit tree is achieved through uniform distribution of the liquid drainage holes, the situation that fertilizer is locally accumulated or intensively applied to a certain area is avoided, and an operator can complete the whole fertilizing operation without adjusting the fertilizing position or direction for many times; and time and labor cost are saved.

The invention relates to duplex stainless steel, in particular to high-nitrogen duplex stainless steel and a preparation method of a strip of the high-nitrogen duplex stainless steel. The duplex stainless steel comprises the following chemical components in percentage by mass: 0.15 to 0.35 percent of N, 24.5 to 26.5 percent of Cr, 8.0 to 11.0 percent of Ni, 3.4 to 3.9 percent of Mo, 1.5 to 3.5 percent of Mn, less than or equal to 0.001 percent of C, less than or equal to 0.20 percent of S i, less than or equal to 0.02 percent of P, less than or equal to 0.01 percent of S and the balance of Fe. The preparation method comprises the steps of smelting, coping, segmented heating forging, coping hot rolling, solution treatment, third-time cold rolling, degreasing and continuous annealing. According to the invention, the N content is increased to 0.15-0.35%, so that the corrosion resistance of the duplex stainless steel is improved, and the plasticity, weldability and toughness of the nitrogen-containing stainless steel are improved; and meanwhile, in the forging and hot rolling processes, the modes of preheating and then rapid temperature rising and heating and rapid temperature rising and heating are adopted, and the temperature is controlled, so that the retention time of a brittle phase at the temperature of 600-1000 DEG C in the forging and hot rolling processes is shortened, the brittle phase precipitation amount on the surface of the intermediate billet is reduced, and the problem of cracking in the forging and hot rolling processes is further avoided.

The invention relates to the technical field of welding materials, in particular to a high-efficiency deposited nickel-based welding wire capable of preventing welding cracks based on phase regulation and application of the high-efficiency deposited nickel-based welding wire, and the nickel-based welding wire comprises the following chemical components in percentage by weight: less than or equal to 0.03% of C, 0.10-0.20% of Si, 2.9-3.2% of Mn, and 1t of P; 0.005%, S: lt; 0.003% of Cu, 19.7-20.5% of Cr, less than or equal to 0.04% of Co, and 1t of Cu; the Ni-based alloy comprises the following components in percentage by weight: 0.10% of Ni, 0.3-0.6% of Ti, 0.4-2.0% of Fe, 2.1-2.9% of Nb, less than or equal to 0.3% of Mo, less than or equal to 0.01% of N, less than or equal to 0.005% of O, less than or equal to 0.50% of other impurity elements and the balance of Ni. The specific value of Ti to Nb is controlled to be 0.10-0.22, the specific value of C to Nb + Ti is controlled to be 0.012 or below, appropriate morphology and distribution of (Nb, Ti) C type intergranular precipitates are obtained, precipitation of grain boundary M23C6 is reduced, and the creep resistance and high-temperature deplasticity crack resistance of the material are effectively optimized.

The invention discloses a pyraclostrobin preparation device which comprises a reaction kettle and further comprises a temperature control cooling box, the temperature control cooling box is provided with a containing space, a partition part is arranged in the temperature control cooling box, the partition part divides the containing space into a cooling channel and a temperature control channel, and the temperature control channel is communicated with the cooling channel. The temperature control cooling box and the separation part are both made of heat conduction materials, a hydrothermal solution is introduced into the temperature control channel, and the temperature of the hydrothermal solution is higher than the crystallization temperature of pyraclostrobin. According to the pyraclostrobin preparation device provided by the invention, the reaction kettle and the temperature control cooling box are combined for use, so that a pyraclostrobin solution can circularly move between the reaction kettle and the temperature control cooling box, and precipitates and irregular crystals are fed into the reaction kettle for re-processing; the production speed of the pyraclostrobin crystals is increased, and meanwhile continuous production can be achieved.

The invention discloses an SJP base material porous structure, a manufacturing method and application of the SJP base material porous structure in hydro-fluctuation belt ecological slope protection, belongs to the technical field of hydro-fluctuation belt ecological restoration, and aims to solve the problems of hydro-fluctuation belt bank slope erosion and water and soil loss caused by waves. The SJP base material porous structure comprises a porous structure and SJP organic solidified soil slurry; the SJP organic solidified soil slurry comprises a viscosity time-varying grouting material, soil and water; the porous structure comprises vesuvianite, a cementing material and a water reducing agent. The manufacturing method comprises the following steps: preparing the porous structure; preparing SJP organic solidified soil slurry; the SJP organic solidified soil slurry is poured into the porous structure in a vibration forming mode, and the SJP base material porous structure is obtained. The SJP organic solidified soil slurry is poured into a porous structure made of pelelith, a cementing material and the like in a vibration forming mode, so that the SJP base material porous structure not only has high strength, but also has good vegetation space and good water permeability.

The invention relates to the field of high polymer materials, and provides a preparation method and application of composite halogen-free high-phosphorus-content flame-retardant polyester aiming at the problems of non-uniform component dispersion and poor anti-dripping effect of the composite flame-retardant polyester. The preparation method comprises the following steps: mixing dihydric alcohol, terephthalic acid, a catalyst, esterification liquid of the reaction type phosphorus flame retardant and the reaction type nitrogen flame retardant, sequentially carrying out esterification reaction and polycondensation reaction to obtain a melt, and treating the melt to obtain the composite halogen-free high-phosphorus-content flame-retardant polyester. The invention also provides application of the flame-retardant polyester. According to the invention, the reactive phosphorus flame retardant participates in the polyester polymerization process, so that the influence on the molecular regularity of polyester is small, and the crystallization behavior and post-processing performance of slices are not influenced; the apparent viscosity of the polyester is improved by the modified nitrogen flame retardant, the polycondensation time is greatly shortened, and the polyester with lasting flame-retardant effect and good anti-dripping effect is obtained by compounding multiple halogen-free flame retardants.

According to the method for preparing the nanocrystalline nickel foil through the electro-deposition method and the nanocrystalline nickel foil prepared through the method, a nickel plate serves as an anode, a titanium plate serves as a cathode, the anode and the cathode are both placed in electrolyte, and the nanocrystalline nickel foil is prepared on the titanium plate through electro-deposition by adopting a pulse power source; the electrolyte comprises water and the following components by concentration: 300-500g / L of nickel sulfate; 5-15 g / L of nickel chloride; 0.01 to 0.2 g / L of a wetting agent; 20-60 g / L of a buffer agent; 0.05-2 g / L of a brightener; the pH value of the electrolyte is 2-4, and the electro-deposition temperature is 40-60 DEG C; the buffering agent is selected from one or two of citric acid and sodium citrate; and the brightener is selected from one or more of butynediol propoxide, butynediol ethoxylate, sodium sulfopropyne ether, propynol ethoxylate and glycerol monopropyne ether. Based on the method, the problem that in the prior art, the nickel foil prepared through an electro-deposition method is large in fine grain size is solved.

The invention relates to the field of hydrogen production by alkaline electrolysis of water, and discloses a cerium-doped ferronickel-based composite catalytic material and a preparation method and application thereof, the cerium-doped ferronickel-based composite catalytic material comprises a foamed nickel substrate and a cerium-doped ferronickel-based electrode layer coating at least part of the foamed nickel substrate; the mass ratio of a cerium element to a nickel element to an iron element in the cerium-doped nickel-iron-based electrode layer is 1: (60-75): (20-40); and the average pore diameter of the cerium-doped nickel-iron-based electrode layer is 1-3 microns. The attenuation rate of an electrode layer of the cerium-doped ferronickel-based composite catalytic material is smaller than or equal to 0.05 mV / h under 1000 h, the precipitation amount of a nickel element is smaller than or equal to 2 micrograms / L under 1000 h, the precipitation amount of an iron element is smaller than or equal to 100 micrograms / L, and the cerium-doped ferronickel-based composite catalytic material has excellent oxygen evolution activity and stability.

The invention discloses isavuconazole sulfate for injection. The isavuconazole sulfate comprises the following raw materials and auxiliary materials: isavuconazole sulfate, an excipient, a proper amount of a sulfuric acid solution (the pH value is adjusted to 1.3-1.5) and water for injection. And the excipient is mannitol, threonine and povidone. By adding mannitol, threonine and povidone and controlling the reasonable proportion of the components, the pH value of the environment where the medicine is located is adjusted, and rapid dissolution of isavuconazole sulfate is achieved. The excipient adopts three components for synergistic interaction, so that the stability of the isavuconazole sulfate for injection is improved, and the generation of impurities is reduced. The prepared isavuconazole sulfate for injection has good stability under the environments of long-term storage, strong light illumination, high temperature, high humidity and the like.

The invention discloses a preparation method and application of a superfine iron-molybdenum catalyst, and belongs to the technical field of nano material synthesis. Aiming at the problem that the activity and the service life of the catalyst are affected due to the phenomena of sintering, segregation and the like of the iron-molybdenum catalyst under a high-temperature condition, a complexing agent and Fe < 3 + > are complexed in a strong acid environment to obtain a mother solution, the mother solution is soaked in MoO3 powder or subjected to co-precipitation with an ammonium molybdate solution or subjected to sol-gel preparation with ammonium molybdate, and the iron-molybdenum catalyst is prepared. And roasting to obtain the iron-molybdenum catalyst. Fe < 3 + > in the mother liquor is dispersed more uniformly, so that the particle size of iron-molybdenum powder is reduced, the particle size distribution range of the iron-molybdenum catalyst is narrowed, the dispersity of Fe and Mo components is enhanced, precipitation of Mo from a main phase is reduced, the activity of the catalyst is improved, and the service life of the catalyst is prolonged. The method is simple in preparation and low in cost, and the obtained superfine iron-molybdenum catalyst is high in selectivity and conversion rate and good in stability when being used for catalyzing selective oxidation of methanol to prepare formaldehyde and has commercial application and popularization value.

The invention relates to the technical field of electrodeposited nickel production, and provides an electrodeposited nickel pore inhibition adding composition which can simultaneously solve the technical problems of pores, acid mist and surface quality in the electrodeposited nickel production process. The composition is prepared from the following components in parts by weight: 0.03 to 0.08 part of anionic surfactant; 0.1 to 0.2 part of a nonionic surfactant; 0.01 to 0.03 part of a hydrogen inhibiting agent; and 1-5 parts of a grain refiner.

The invention provides a method for preparing lithium iron phosphate by recovering a waste lithium iron phosphate material, which comprises the following steps: crushing a waste lithium iron phosphate battery positive plate, vibrating and sieving to obtain a lithium iron phosphate raw material, dissolving in an acid solution, filtering, and collecting a first filtrate; adding a ferrous sulfate solution into the first filtrate to obtain a mixed solution; adding hydrogen peroxide and an ammonia water solution into the mixed solution to adjust the pH value, filtering and washing after reaction to respectively obtain a second filtrate and a filter cake, and washing and drying the filter cake to obtain iron hydroxyphosphate; adding a barium hydroxide solution into the second filtrate, and filtering after complete reaction to obtain a third filtrate; adding a phosphoric acid solution into the third filtrate to obtain fourth filtrate; mixing the hydroxyl iron phosphate, the fourth filtrate and a carbon source, sanding the slurry, and drying to obtain powder; and sintering the powder in an inert atmosphere, naturally cooling and crushing to obtain the carbon-coated lithium iron phosphate material.

The invention relates to an ink-jet printing ink formula and a preparation method thereof, and belongs to the technical field of ink preparation. The carbon black color paste specifically comprises the following raw materials in parts by mass: 3 to 7 parts of carboxylated carbon black, 2 to 4 parts of modified protein, 1 to 3 parts of a dispersant, 0.1 to 0.3 part of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride, 0.1 to 0.12 part of N-hydroxysuccinimide, 1 to 5 parts of a 2-morpholinoethanesulfonic acid buffer solution, 0.1 to 0.3 part of an auxiliary agent and 10 to 50 parts of a composite solvent. The polyethylene glycol modified ethanol clostridium protein is used in the components, and carboxylated carbon black and the dispersing agent are combined, so that the compatibility among the components in the system is improved, and good thermal stability and system stability are achieved while the particle size of the black ink is refined.

The invention belongs to the technical field of adhesives, and discloses a low-precipitation chip-scale bottom filling adhesive with excellent bonding performance and a preparation method, the filling adhesive comprises the following components by weight: 2-4 parts of self-synthesized organosiloxane, 30-35 parts of epoxy resin, 1-3 parts of a coupling agent, 1-2 parts of black paste, 60-65 parts of a filler, and 10-15 parts of a curing agent. Compared with the conventional chip-level underfill adhesive, the product provided by the invention has higher bonding strength on a silicon wafer and an LMC substrate; and after being placed in a Uhast environment box for 192 hours, the adhesive still has excellent bonding strength on silicon wafers and LMC substrates under a high-temperature condition. In addition, the product also has the characteristics of excellent flowing property, low precipitation and good heat resistance, and can fully meet the requirements of operability and high reliability of chip integrated packaging.

The invention provides a high-pressure micro-jet homogenizing system and process method, and relates to the technical field of high-pressure homogenizing equipment, the high-pressure micro-jet homogenizing system comprises a pneumatic diaphragm pump, a first plunger pump, a second plunger pump, a diamond interaction cavity, a heat exchanger and a storage container; the pneumatic diaphragm pump, the first plunger pump, the second plunger pump, the diamond interaction containing cavity, the heat exchanger and the storage container form a material homogenizing pipeline, a CIP cleaning pipeline and an SIP sterile heating pipeline through pipelines, and a liposome extrusion pipeline is connected into the material homogenizing pipeline. According to the high-pressure microjet homogenizer, the flow of the high-pressure microjet homogenizer is increased to a great extent by using the double plunger pumps, particles and precipitates in a product are reduced by arranging the lipidosome extrusion pipeline, and the product quality is improved.

The invention relates to the technical field of metallurgy, in particular to a heat treatment process for improving the HIC resistance of a Q345R (HIC) steel plate, which comprises the following steps of: heating the steel plate to 30-50 DEG C above AC3, keeping in-furnace time for more than or equal to 30 minutes, and then cooling in two stages: in the first stage, quickly cooling, namely cooling to Ar1 temperature at the speed of 25-30 DEG C / s; in the second stage, the cooling speed is reduced, and cooling is conducted to the Bs temperature at the speed of 2-5 DEG C / s; and then air-cooling to room temperature. The phase change degree of the steel plate is controlled by adopting a two-stage cooling mode, so that the final structure of the steel plate is changed, the purposes of reducing the banded structure and improving the acid resistance of the Q345R (HIC) steel plate are achieved, and good social and economic benefits are achieved.

The invention belongs to the technical field of microorganisms, and relates to lactobacillus delbrueckii subsp. Bulgaricus and application thereof. The invention provides a strain of Lactobacillus delbrueckii subsp. Bulgaricus, the strain of Lactobacillus delbrueckii subsp. Bulgaricus is named as Lactobacillus delbrueckii subsp. Bulgaricus, the Lactobacillus delbrueckii subsp. Bulgaricus is preserved in China General Microbiological Culture Collection Center (CGMCC), and the preservation number is CGMCC No.32206. The invention also provides a preparation method of the Lactobacillus delbrueckii subsp. Bulgaricus. The method has the effects of enhancing the texture characteristics of the goat milk, reducing the goaty smell of the goat milk and the like, and has important significance on promoting the development of the goat milk industry.

The present invention discloses a single-layer photovoltaic encapsulation adhesive film and a preparation method thereof. The present invention adopts a solution grafting method to graft an anti-potential induced degradation monomer into a polyolefin elastomer molecular chain. Compared with the direct physical mixing of the anti-potential induced degradation monomer with granules, the functional polyolefin elastomer prepared by the method of the present invention can increase its polarity, have better compatibility with additives, reduce the precipitation of additives to the film surface, reduce the slippage of the film, have better long-term storage performance, and ensure that the component has better anti-PID performance.

The invention relates to photo-thermal dual-curing hyperbranched resin, a synthesis method and an ultraviolet curing resin composition for 3D printing. The invention relates to a synthetic method of photo-thermal dual-cured hyperbranched resin. The synthetic method comprises the following steps: adding isocyanate and a catalyst 1 into a reaction kettle at 55-60 DEG C; 2, 2-dimethylolbutyric acid is dissolved in a diluent, then dropwise added and subjected to a heat preservation reaction until an intermediate product A1 is obtained; adding a catalyst 2, and continuously reacting at 65-70 DEG C to obtain an intermediate product A2; and cooling to 55-60 DEG C, dropwise adding a mixture of tert-butylaminoethyl methacrylate and a polymerization inhibitor, and carrying out a heat preservation reaction until the isocyanate value is less than 0.5% to obtain the photo-thermal dual-curing hyperbranched resin, which has the characteristics of low viscosity, high functionality, high activity and reduced volume shrinkage, can be used for preparing an ultraviolet curing resin composition for 3D printing, and has wide application prospects. The material has high rigidity and good toughness at the same time.

The permanent magnet comprises, by mass, REaNbFe100-a-b-c-dCocBd, RE is a combination of two or more of rare earth elements including lanthanum, cerium, praseodymium and neodymium and must contain the cerium element, the mass percentage of the cerium element is not lower than 6%, N is one or more of aluminum, copper, gallium and zirconium, the sum of the mass percentage of the elements is not lower than 6%, the sum of the mass percentage of the elements is not lower than 6%, the sum of the mass percentage of the elements is not lower than 6%, and the sum of the mass percentage of the elements is not lower than 6%. The permanent magnet is prepared from two raw materials including a main phase alloy and an auxiliary phase alloy through double-alloy formation, the main phase alloy comprises a cerium element, and the auxiliary phase alloy comprises a cobalt element; through the addition of the cobalt element, the precipitation of the CeFe2 phase can be reduced, a new main phase is formed, the main phase volume ratio of the permanent magnet is increased, the problem of magnetic performance deterioration caused by the addition of the cerium element is avoided, and the prepared cerium-containing rare earth permanent magnet has high coercive force.

The invention discloses a microbial culture device for biotechnology, and relates to the technical field of biotechnology, and the microbial culture device comprises a composite mechanism. According to the microbial culture device for the biotechnology, through the design of a composite mechanism, a culture medium is placed in a culture dish, and the culture dish is placed in a fixing assembly by pulling a bearing bracket, so that the effect of fixing an object is achieved, shaking during operation is prevented, and the situation that the culture effect is affected by collision and breakage of the object is avoided; the side, close to the composite shell, of the connecting support is of a beveled structure, liquid flowing is facilitated, liquid residues are reduced, the culture effect is prevented from being affected, when culture is conducted in the composite shell through a culture dish, operation is conducted through a sprayer and a heater according to changes of humidity and temperature, and then the culture dish is taken out after culture is finished; and the interior of the equipment is sprayed through the sprayer, the bearing support is rubbed through the cleaning assembly, internal washing is cleaned, and impurities and stain residues are reduced.

The purpose of the present invention is to improve the life of a battery using a negative electrode comprising a metal by reducing the amount of gas generation, reducing the resistance, and reducing the amount of metal elements such as Mn and Ni deposited in a positive electrode in the negative electrode. A secondary battery having a liquid electrolyte and a negative electrode in which a fluoropolymer is laminated on a layer containing a metal, the secondary battery being characterized in that: the metal is at least one type selected from the group consisting of lithium, sodium, magnesium and zinc; the fluoropolymer is a copolymer having a vinylidene fluoride unit (A) and a structural unit (B) of at least one monomer selected from the group consisting of tetrafluoroethylene, trifluoroethylene, chlorotrifluoroethylene, a monomer represented by general formula (1), a monomer represented by general formula (2), and a monomer represented by general formula (3), and the liquid electrolyte contains a fluorinated ether. [chemical formula 1] # imgabs0 # [chemical formula 2] # imgabs1 # [chemical formula 3] # imgabs2 #

The invention provides a dustproof dynamic vulcanization thermoplastic elastomer applied to automotive interiors and a preparation method thereof, and relates to the field of high polymer materials. The elastomer is prepared from 30 to 60 parts of ethylene propylene diene monomer, 5 to 10 parts of permanent amphoteric antistatic master batch, 8 to 16 parts of low-odor high-viscosity mineral oil, 10 to 40 parts of low-odor high-viscosity polypropylene, 4 to 10 parts of vulcanizing agent, 0.2 to 0.4 part of antioxidant and 0.1 to 0.5 part of catalyst, the antistatic master batch in the formula takes ethylene propylene diene monomer as a base material, and meanwhile, an efficient and permanent amphoteric antistatic agent component is introduced, so that electrostatic dust adsorption on the surface of the elastomer is greatly reduced; and meanwhile, the low-purity catalyst is adopted to reduce the dynamic vulcanization reaction speed, so that the odor generated in the dynamic vulcanization reaction is reduced, and the prepared dynamic vulcanization thermoplastic elastomer is more suitable for being applied to automotive interiors.