72results about How to "Loose structure" patented technology

The invention discloses a water-retaining controlled-release fertilizer and a preparation method thereof, and relates to the technical field of controlled-release fertilizers. According to the invention, the attapulgite is modified by a phosphoric acid solution, so that the surface of the attapulgite has acidic groups, and the groups can be adsorbed with positive ions in the fertilizer, so that nutrients are adsorbed and fixed on the surface of the attapulgite, and the speed of releasing the fertilizer nutrients into a soil solution is delayed; meanwhile, the modified attapulgite and some nutritional ingredients in the fertilizer can form indissolvable compounds, so that the nutrients are slowly released along with gradual dissolution of the compounds, and the fertilizer efficiency of the fertilizer is prolonged; when the modified attapulgite encounters water, the entering speed of water can be effectively slowed down, dissolution of nutrients in fertilizer particles is controlled, and then the slow and controlled release effect is achieved; and the modified attapulgite can regulate the pH value of the soil, so that the soil environment is more suitable for plant growth and slow release of fertilizer nutrients.

The invention discloses a graphene-coated hard carbon negative electrode material and a preparation method thereof, and belongs to the technical field of hard carbon negative electrode materials. The preparation method of the graphene-coated hard carbon negative electrode material comprises the following steps: carrying out pretreatment and three-step soaking on coconut shells, carrying out biomass carbonization, mixing with a microbial suspension, and adsorbing to obtain a microbial adsorption type hard carbon material; and then carrying out surface treatment, chemical vapor deposition, impregnation, secondary chemical vapor deposition and annealing treatment on the microbial adsorption type hard carbon material to obtain the graphene coated hard carbon negative electrode material. The negative electrode material prepared by the method is high in first discharge capacity, high in first coulombic efficiency and good in cycle performance.

The invention discloses bacillus pumilus, a complex microbial inoculant and application of the complex microbial inoculant in a saline-alkali soil four-dimensional improvement method, and belongs to the technical field of microorganism application. According to the invention, a strain of bacillus pumilus is screened, and the bacillus pumilus has excellent saline-alkaline tolerance, has multiple functions of producing organic acid, proline, siderophore, trehalose, IAA and betaine and the like, and has obvious advantages in saline-alkali soil improvement; the stress resistance of plants is improved through multiple mechanisms, nutrient absorption is promoted, the soil structure and chemical environment are improved, the stability and diversity of soil microbial communities are enhanced, and then effective treatment on the saline-alkali soil is achieved. According to the four-dimensional improvement method for the saline-alkali soil, the microbial technology, the physical technology, the chemical technology and the nutrition technology are combined, the saline-alkali soil is improved from the four dimensions of physics, chemistry, biology and nutrition, soil can be effectively improved, and repeated planting is not likely to happen.

The invention belongs to the field of planting nutrient soil, and particularly relates to a functional vegetable seedling substrate based on vegetable straw modification. The substrate is prepared from the following components in parts by weight: 6 to 7 parts of peat, 3 to 4 parts of tomato straw decomposed base material, 1.5 to 2 parts of perlite, 0.1 to 0.3 part of nutrient element loaded biochar, 0.1 to 0.2 part of mineral source potassium humate and 0.01 to 0.03 part of diatomite. According to the invention, a high-quality tomato straw decomposed base material is produced by adopting a rapid decomposition process, a tomato straw modified biochar base material is produced by adopting an anaerobic pyrolysis process, and through efficient compatibility of nutrient elements, mineral elements and the like, a new process and a new product of the functional vegetable seedling culture substrate based on tomato straw modification are produced.

The invention provides a preparation method of an antireflection film of a semiconductor laser, and belongs to the technical field of semiconductor lasers. The problem that a film layer falls off in an existing anti-reflection film preparation process is solved. Comprising the following steps: pretreatment cleaning before bar coating: vacuumizing a chamber of reaction magnetic control equipment to a vacuum degree of 10 <-6 > Torr grade, turning on a heating lamp to heat the chamber to a set temperature, starting an ion source, introducing a proper amount of plasma gas into the ion source, introducing a proper amount of plasma gas into the chamber to enable the vacuum degree of the chamber to reach a 10 <-3 > Torr grade, and then cleaning; in the process steps of plating the silicon nitride thin film and the aluminum oxide thin film, a chamber is kept at a certain temperature, and then the vacuum degree of the chamber is reduced during film plating; and the performance of the laser is stably improved while the production yield of the semiconductor laser is improved.

The invention relates to the field of a Maotai-flavor liquor brewing process, in particular to a Maotai-flavor liquor stacking fermentation method for improving the yield and quality of base liquor of Maotai-flavor liquor, which comprises the following steps: a, conveying fermented grains to a stacking fermentation process after being subjected to a cooking and gelatinization process, a steaming and steaming process, a spreading and airing process and a yeast adding process; b, during upper pile stacking, the upper pile temperature of the saccharification pile is in a range of 23-32 DEG C; when the fermented grains are piled up, at least two saccharification piles are piled up in the same team at the same time, and the weight of the fermented grains piled up on each saccharification pile each time is smaller than 400 kg; the time interval of stacking the fermented grains each time is greater than 60 minutes; the pile height is 1.5 m to 2 m, the pile bottom diameter is 4 m to 6 m, the single saccharification pile capacity is 22 to 24 retorts / pile, and the single retort capacity is 800 to 1300 kg / retort; c, after stacking is completed, the stacking saccharification duration of the sand discharging stage and the sand making stage is not less than 36 h, and the stacking saccharification duration of the first-time wine stage to the sixth-time wine stage is not less than 84 h; and d, when the accumulation is completed, the accumulation temperature of the saccharification pile is in a range of 28-55 DEG C.

The invention provides a cow dung organic controlled-release fertilizer and a preparation method thereof. The preparation method comprises the following steps: preparing porous cow dung biochar; preparing a cow dung organic fertilizer; uniformly mixing and stirring the porous cow dung biochar, the natural fibers in the treated cow dung and the cow dung organic fertilizer, and extruding and granulating in a granulator at normal temperature; drying to obtain the composite porous cow dung biochar with the sea urchin structure; preparing a hydrogel membrane solution, soaking the composite porous cow dung biochar with the sea urchin structure in the hydrogel membrane solution, and drying to obtain the cow dung organic controlled-release fertilizer. The cow dung organic controlled-release fertilizer formed by wrapping the cellulose hydrogel film layer with the composite porous cow dung biochar with the sea urchin structure is adopted, the porous cow dung biochar retains organic matter and nutritional ingredients in cow dung, and meanwhile moisture and pathogenic microorganisms are reduced through the carbonization process; the organic fertilizer is suitable for release and utilization of long-acting nutrient substances, the cow dung organic fertilizer is slowly released and utilized firstly, and the cow dung biochar is released and utilized for a long time.

The utility model relates to the technical field of foundation pit soil body reinforcement, in particular to a foundation pit soil body reinforcement device which comprises a guide pipe, a conical head is movably installed at the bottom end of the guide pipe, an anti-blocking mechanism is arranged between the guide pipe and the conical head, and a pressing disc is arranged at the top end of the guide pipe. And a supporting plate is movably mounted at the top end of the guide pipe. The guide pipe, the conical head and the supporting plate are matched for use, the conical head is kept downward during pressing, the conical head is of a conical structure, so that when the conical head is pressed into soil, resistance is small, the discharging hole is attached to the pipe wall of the guide pipe, breakage cannot be caused, and due to the fact that the outer diameter of the conical head is larger than that of the guide pipe, the conical head is not prone to falling off. When the discharge hole is exposed, a large amount of soil does not exist on the outer side of the discharge hole, and even if a small amount of soil exists, due to the fact that the soil is chiseled, the structure is loose, and filling is more convenient.

The invention discloses a preparation method and application of an efficient desulfurizing agent, and belongs to the technical field of desulfurizing agent preparation. The preparation method of the efficient desulfurizing agent comprises the following steps: step 1, adding ferric salt and magnesium salt into a container containing distilled water, stirring and dissolving to obtain a mixed solution A, then adding a modified template agent and a pore-forming agent into the container containing distilled water, stirring and dissolving to obtain a mixed solution B; 2, uniformly mixing the mixed solution A and the mixed solution B, heating and stirring to obtain a colloidal solid C, freeze-drying the colloidal solid C, calcining and grinding to obtain a spongy composite oxide; and step 3, adding the spongy composite oxide into a tetrahydrofuran solution containing the modifier, sealing and stirring, putting into a reaction kettle, carrying out hydrothermal reaction, and after the reaction is finished, filtering, washing and drying to obtain the efficient desulfurizer. The high-efficiency desulfurizing agent prepared by the method has an excellent desulfurizing effect.

The utility model relates to the technical field of door and window profiles, in particular to a profile connecting structure and an anti-falling flat aluminum alloy screen window, which comprises a connecting structure body, a first profile arranged on the lower side of the connecting structure body, a movable block mounted on one side of the first profile, a clamping jaw fixedly connected to the top of the movable block, a clamping block arranged on the upper side of the clamping jaw, and a second profile arranged on one side of the clamping block. Fixing sleeves are installed on the two sides of the second sectional material, and locking sleeves are arranged on the upper sides of the fixing sleeves. The beneficial effects of the utility model are that through the clamping connection of the clamping jaw and the clamping block, the problems that the structure is loose and the installation is not facilitated because the angle aluminum and the self-tapping screw are directly used for connection can be avoided, the screw is exposed outside and is easy to rub a door and window user and is not beautiful enough when the angle aluminum is used for fixing a profile or welding to manufacture a door and window, and the angle aluminum can be disassembled and assembled for many times and can be repeatedly used.

The invention relates to the field of refractory materials, in particular to a high-strength refractory material and a preparation method thereof, which are used for solving the problem that the existing traditional refractory material is low in strength and difficult to meet the high-standard requirement of modern industry on equipment. The high-strength refractory material comprises the following components: silicon carbide, tabular corundum, silicon powder, yttrium oxide, magnesium oxide, titanium diboride and a phosphorus-containing phenyl multi-epoxy-group binding agent, according to the preparation method, silicon carbide, tabular corundum, silicon powder, yttrium oxide, magnesium oxide and titanium diboride are taken as main raw materials, the main raw materials are endowed with excellent mechanical properties, and after a phosphorus-containing phenyl polyepoxy binding agent is added, the mechanical properties of the main raw materials can be further remarkably improved, so that the prepared refractory material has the characteristics of high strength, high temperature resistance and the like. The composite material shows high durability and reliability in a high-temperature environment, and is suitable for thermal protection in the high-temperature environment and internal construction of high-temperature equipment.

The application belongs to the technical field of food preparation, and relates to a preparation method of PE emulsion prepared from citrus peel residues and high-dietary-fiber fat-reducing mayonnaise. The preparation method of the PE emulsion is as follows: (1) the dried and crushed citrus peel residues are soaked and pretreated with acidic oxidized electrolytic water, and after the soaking is completed, the activated materials are obtained by washing, drying and sieving; (2) the activated materials are mixed with water and then subjected to water bath heating treatment, and the citrus peel residue fiber concentrate is obtained by drying the residue; (3) the citrus peel residue fiber concentrate is dispersed and then subjected to colloid mill pretreatment and wet ball milling, and the citrus peel residue-based colloid suspension is obtained after the wet ball milling; and (4) the citrus peel residue-based colloid suspension is mixed with vegetable oil and then subjected to shearing homogenization to obtain a coarse emulsion, and then the coarse emulsion is subjected to ultrasonic treatment, and finally the citrus peel residue-based PE emulsion is obtained. The problems of unstable structure, easy oxidation, poor storage stability and poor taste of the fat-reducing mayonnaise prepared by using the PE emulsion are solved.

The invention belongs to the technical field of materials, and relates to a high-performance PCR composite material and a preparation method thereof, the high-performance PCR composite material comprises 10-20 parts of polyethylene, 0.1-0.5 part of an initiator, 0.1-0.5 part of a catalyst, 50-60 parts of a PCR return material, 10-20 parts of TPU, HEMA and 5-10 parts of an antioxidant. The preparation method comprises the following steps: (1) blending the PCR return material with polyethylene to obtain a blend; (2) mixing HEMA (hydroxyethyl methacrylate), TPU (thermoplastic polyurethane), an initiator and a catalyst, and reacting to obtain HEMA-g-TPU; the blend and HEMA-g-TPU are subjected to plasma activation, and a modified blend and modified HEMA-g-TPU are obtained; and (3) adding the modified blend and the modified HEMA-g-TPU into a twin-screw extruder, adding an antioxidant, and processing by the extruder to obtain the high-performance PCR composite material particles. The problem that the mechanical property of the PCR returned material is insufficient can be effectively solved.

The utility model relates to the technical field of fabric winding, specifically a fabric winding mechanism, including bottom plate, slide rail and fixed block, the fixed frame upper end places the winding roller, the fixed frame outer wall upper end one side screw has the slide rail, the slide rail inner wall one side screw has the guide rod, the guide rod outside slide installation has the sliding block, the sliding block outer wall upper end rotation has the compression roller installed, the sliding block outer wall upper end one side welds the fixed block, the fixed block inside rotation has the pivot, the pivot one side outer wall welds the support arm, the support arm outer wall one side screw has the beating pole, can make the dust, the thread end or residual fiber that fabric body surface adheres and falls off, reached the purpose to the fabric body cleaning, ensured the cleanness of fabric body, the guarantee of subsequent winding quality, and can release the stress inside fabric body, the wrinkle of unfolding fabric body, further guarantee the winding quality of fabric body.

The utility model discloses a heat insulation and heat preservation gel structure which comprises a base plate assembly, the top of the base plate assembly is fixedly connected with a medium layer, the top of the medium layer is fixedly connected with a colloid layer, a heat insulation layer is arranged on the right side of the base plate assembly in a penetrating mode, and the front face and the back face of the base plate assembly are fixedly connected with heat preservation layers. A mineral wool layer is arranged in the heat insulation layer and used in cooperation with the heat insulation layer, a polystyrene board layer is fixedly connected to the bottom of the mineral wool layer and used in cooperation with the mineral wool layer, and a polyurethane foaming material layer is fixedly connected to the bottom of the polystyrene board layer. The polyurethane foaming material layer is used in cooperation with the polystyrene board layer. According to the gel structure, the phenomenon that the traditional heat insulation and heat preservation effect is poor is changed, various heat insulation and heat preservation materials are adopted for heat insulation and heat preservation treatment, the phenomenon of heat loss cannot occur in the using process, and the phenomenon that the using quality of gel cannot be guaranteed is avoided.

This invention belongs to the field of material surface treatment technology, specifically relating to a wafer polishing slurry, its preparation method, and its application. The wafer polishing slurry comprises abrasives, oxidants, dispersants, surfactants, pH adjusters, and water. The components of the wafer polishing slurry work synergistically, shortening polishing time and improving polishing efficiency when applied to wafer polishing. Furthermore, it significantly improves the surface quality of the polished wafer, markedly reducing scratches and defects, and lowering surface roughness to below 0.15 nm, thus meeting the surface quality requirements of fields such as power electronics and radio frequency devices.

The invention relates to the technical field of aluminum hydroxide preparation, in particular to a method for preparing superfine aluminum hydroxide particles and the superfine aluminum hydroxide particles. The method comprises the following steps: mixing a supersaturated sodium bicarbonate solution and a first Bayer process sodium aluminate solution to obtain a seed slurry containing amorphous aluminum hydroxide; wherein the solid content of the amorphous aluminum hydroxide is greater than 30g / L; and performing decomposition reaction on the second Bayer process sodium aluminate solution and the seed slurry containing the amorphous aluminum hydroxide to obtain decomposed slurry containing the superfine aluminum hydroxide particles. According to the method, the morphological characteristics of an aluminum hydroxide product generated by decomposing a sodium aluminate solution are accurately regulated and controlled on the basis of the characteristics of a large number of disordered structures of amorphous aluminum hydroxide, so that the median particle size of aluminum hydroxide particles is 0.3 mu m or less, the specific surface area is up to 15 m < 2 > / g-30 m < 2 > / g, the oil absorption is 35 mL / 100 g-45 mL / 100 g, and the weight content of caustic alkali is 0.2% or less.

This invention discloses a composite dewatering agent for sludge dewatering in wastewater treatment and its preparation method, belonging to the field of sludge treatment technology. The composite dewatering agent comprises, by weight, the following raw materials: 30-50 parts chitosan-acetylcysteine-modified coal gangue, 20-40 parts cationic starch-modified fly ash fiber, and 1-3 parts nonionic surfactant. The composite dewatering agent of this invention, comprising chitosan-acetylcysteine-modified coal gangue, cationic starch-modified fly ash fiber, and nonionic surfactant, significantly improves the sludge dewatering rate through the synergistic effect of each component, utilizing multiple mechanisms such as charge neutralization, adsorption bridging, and the release of bound water through extracellular polymer destruction. This invention fully utilizes solid waste and natural materials in the preparation of the composite dewatering agent, achieving resource utilization of solid waste while avoiding residual pollution from traditional polyacrylamide flocculants and reducing environmental hazards.

This invention discloses a composite defluoridating agent for deep defluorination of water and its preparation method. The defluoridating agent is an aqueous solution of a metal salt or an aqueous solution of a metal salt dispersed with nanoparticles. The active ingredient of the defluoridating agent contains at least three metal ions: lanthanum, aluminum, and zinc, and the molar ratio of La, Al, and Zn is 1~4:3~5:1~3. The pH of the aqueous solution is 6.0~6.5. Compared with traditional PAC, which requires more than 5 mmol / L to reduce fluoride ions to 1 mg / L, the composite defluoridating agent of this invention only requires 1.2 mmol / L (based on the total concentration of active ingredients) to reduce fluoride ions to below 1.0 mg / L, significantly reducing treatment costs and sludge production. In addition, this invention has a fast settling speed, achieving solid-liquid separation within 10 minutes. In the preferred scheme containing nanoparticles, magnetic adsorption settling can be completed within 5 minutes, greatly shortening the water treatment process cycle.

The present invention relates to the technical field of packaging devices, and in particular to a quantitative packaging device for feed production, comprising a base, a mounting plate fixedly connected to the top of the base, a lower synchronous disk rotatably connected to the top of the mounting plate, an electronic scale installed on the top of the lower synchronous disk, multiple groups of fixed rods evenly installed on the outer wall of the mounting plate, and the mounting plate is fixedly connected to a turntable through multiple groups of fixed rods, a rotating part is provided at the bottom of the turntable, and the turntable is connected to an upper synchronous disk through the rotating part. The present invention can not only conveniently complete the packaging of silage, but also enable the packaged fermentation bag to flexibly adapt to the natural expansion requirements of the silage during the fermentation process, that is, it can ensure that the silage is fully compacted to promote the fermentation effect, while avoiding the problem of fermentation bag rupture caused by the fermentation expansion of the silage, thereby effectively ensuring the fermentation effect of the silage, and then effectively improving the packaging quality of the silage.

The invention provides a lactobacillus fermentation extraction method of marine red algae polysaccharide and application of the marine red algae polysaccharide, and the method comprises the following steps: mixing marine red algae powder with water, and carrying out pasteurization at 60-70 DEG C for 20-40 minutes; adding lactobacillus plantarum into the sterilized marine red algae turbid liquid, and performing fermentation culture to obtain a marine red algae fermentation mixed liquid; heating and extracting the marine red algae fermentation mixed solution at 85-95 DEG C for 1.5-2.5 hours, centrifuging, collecting supernate, carrying out rotary evaporation and concentration to 1 / 5 of the original volume, then adding ethanol, standing overnight, discarding the supernate, adding distilled water into precipitate for redissolving, and deproteinizing by using a Sevag method to obtain a polysaccharide solution; and dialyzing the polysaccharide solution, and concentrating and freeze-drying the dialysate to obtain the marine red algae polysaccharide. According to the method, the low-molecular-weight modified polysaccharide is obtained through lactobacillus plantarum fermentation, extraction and purification, and the low-molecular-weight modified polysaccharide is high in sulfate group content, loose in structure, capable of remarkably inhibiting AGEs-induced intestinal cell oxidative stress and inflammatory reaction, capable of being used for preparing the glycosylation injury resisting medicine and good in industrialization prospect.

The invention relates to the technical field of biomedical materials, and particularly discloses a sodium hyaluronate composite filler for injection as well as a preparation method and application thereof. The composition provided by the invention comprises methoxy polyethylene glycol-poly-L-lactic acid nanoparticles, sodium hyaluronate and a dispersion medium. The composite filler can realize accurate positioning and filling of an injection position, is good in hydrophilicity and high in biocompatibility, can reduce inflammatory reaction after material implantation, can promote collagen regeneration earlier and better, and is safe and effective according to animal experiments.

The invention discloses a biochar-based coated selenium slow-release fertilizer and a preparation method thereof, and belongs to the technical field of fertilizers. The fertilizer comprises a core layer and a coating layer coated on the surface of the core layer, and the raw materials of the core layer comprise the following components by mass: 70-80 parts of urea, 60-70 parts of monoammonium phosphate, 50-60 parts of potassium chloride, 30-40 parts of superphosphate, 2-3 parts of sodium silicate, 2-4 parts of magnesium sulfate, 8-15 parts of nano-selenium, and 4-6 parts of tourmaline powder; the raw materials of the coating layer comprise the following components: 120-150 parts of modified biochar powder, and 20-30 parts of modified starch / polyvinyl alcohol composite. The fertilizer has good slow-release effect, high utilization rate of selenium element, good fertilizer efficiency, can effectively improve the yield and quality of crops, and has a simple preparation process, low cost, and no pollution.

The invention discloses a preparation method of super-elastic cotton for underwear, and relates to the field of textile fabrics, and the super-elastic cotton is prepared by blending cotton fibers and spandex fibers; wherein the cotton fibers are pretreated as follows: the cotton fibers are soaked in a pretreatment solution, and the pretreatment solution comprises an alkaline solution of magnesium lithium silicate and ionic liquid; the cotton fibers are soaked in the pretreatment solution, an alkaline solution in the pretreatment solution can clean impurities in the cotton fibers, and magnesium lithium silicate is attached to the surfaces of the cotton fibers, so that the cotton fibers are loose in structure and not prone to breakage, and the air permeability is improved; the ionic liquid is combined, so that the performance stability of the cotton fibers in the blending process can be improved; in addition, the spandex fibers are soaked in the mixed solution, so that the antistatic performance of the spandex fibers in the blending process is improved, and the production quality is optimized.

This invention belongs to the field of reconstituted tobacco technology, and provides a reconstituted tobacco based on a functional compound of Phyllanthus emblica and its preparation method. The reconstituted tobacco includes a porous composite substrate and a coating liquid. The Phyllanthus emblica functional compound includes Phyllanthus emblica pomace pulp and Phyllanthus emblica extract. The porous composite substrate is prepared by mixing and molding Phyllanthus emblica pomace pulp and tobacco pulp, wherein the Phyllanthus emblica pomace in the pulp has a porous and loose structure. The coating liquid is prepared by mixing Phyllanthus emblica extract and tobacco concentrate. The reconstituted tobacco prepared by the method of this invention can enhance the fruity sweetness and aroma of the reconstituted tobacco, improve its aroma quality, reduce its irritation, reduce its woody smell, and effectively improve the comfort of the reconstituted tobacco.

The utility model discloses a three-dimensional suede braid with a three-layer core-spun structure, which comprises a base layer, one side of the base layer is connected with a functional layer in a sewing manner, one side of the functional layer is connected with a suede layer in a sewing manner, the functional layer comprises a breathable layer connected with the base layer in a sewing manner, one side of the breathable layer is connected with a core-spun layer in a sewing manner, and the core-spun layer is connected with the suede layer in a sewing manner. One side of the core-spun layer is fixedly connected with a bearing layer. The utility model relates to the technical field of braids. According to the three-dimensional suede braid with the three-layer core-spun structure, the base layer and the suede layer are arranged, arrangement of springs is avoided, the whole braid is convenient to produce, weave and implement, wool blended polyester is adopted on the whole surface, the surface of the braid has a suede, the braid is soft and smooth in hand feeling, the quality is improved, and later use is facilitated; in addition, the polyester fibers and the nylon fibers are adopted for bottoming weaving, so that the air permeability is kept, and meanwhile, the fabric has the functions of washing resistance, wear resistance and ultraviolet resistance.

The utility model discloses a yeast turning device for soy sauce aspergillus culture. According to the technical key points, the device comprises a fermentation box used for containing aspergillus, a supporting mechanism used for supporting the fermentation box and a driving mechanism are arranged below the fermentation box, the driving mechanism comprises a motor and a transmission shaft connected with an output shaft of the motor, and a shaft sleeve used for being connected with the transmission shaft in a clamped mode is arranged in the fermentation box; and a stirring piece for stirring aspergillus is arranged on the shaft sleeve. The device has the advantages that the eccentric wheel drives the ejector rod to move upwards, so that the fermentation box generates intermittent vibration, the structure of an aspergillus mass becomes loose, internal heat can be dissipated during fermentation, the aspergillus mass is kept in a temperature environment suitable for fermentation, and the fermentation quality is improved; and the stirring piece can stir the aspergillus at the bottom to the surface, so that the effect of internal and external exchange of the aspergillus is realized, the heat of the internal aspergillus is fully dissipated, and the aspergillus with higher quality is prepared.

The invention discloses a formaldehyde-free flame-retardant lignin adhesive and a preparation method thereof. The formaldehyde-free flame-retardant lignin adhesive comprises the following raw materials in parts by weight: 30-40 parts of modified lignin, 10-20 parts of water, 5-10 parts of industrial starch, 3-5 parts of a cross-linking agent, 1-2 parts of a defoaming agent, 1-2 parts of an antioxidant and 1-2 parts of a preservative. The modified lignin is obtained by purifying, activating and modifying the lignin. The hydroxyl active groups in the modified lignin react with isocyanate groups in a cross-linking agent polyphenyl polymethylene polyisocyanate during the curing process of the adhesive, so that the adhesive has certain polyurethane characteristics and has good anti-aging performance and mechanical properties. At the same time, hyperbranched silane and DOPO anhydride are introduced in the modification process to form a cross-linking network, so that the adhesive has good flame retardancy and certain anti-aging and water resistance. The introduction of a large number of amino and carboxyl groups can also improve the bonding strength of the adhesive.

The invention belongs to the technical field of sugar alcohol compositions, and particularly relates to a sugar alcohol composition containing lutein ester and a preparation method of the sugar alcohol composition. The sugar alcohol composition containing the lutein ester is prepared from the following components: 1.2 to 4.5 parts of gelatin, 30 to 36 parts of crystalline sugar alcohol, 38.6 to 44.2 parts of non-crystalline sugar alcohol, 2 to 6 parts of non-reducing sugar, 1 to 2 parts of glycerol, 1 to 2.3 parts of an emulsifier, 4 to 10 parts of grease, 0.2 to 0.6 part of lutein ester powder, 4 to 8 parts of sugar-free blueberry powder, 0.07 to 1.45 parts of an acidity regulator, 0.6 to 1.1 parts of blueberry essence powder, 2 to 4 parts of concentrated blueberry juice and 49.2 to 57.4 parts of water. The preparation method comprises the following steps: respectively preparing a gelatin solution, a mixture A, a mixture B, a mixture C and syrup for later use; and adding a gelatin solution into the syrup, stirring, sequentially adding the mixture A, the mixture B, the mixture C and the sugar-free blueberry powder, uniformly stirring, cooling, and finally preparing the sugar alcohol composition containing the lutein ester. According to the sugar alcohol composition, the sugar alcohol and other raw materials are reasonably selected and proportioned, and the problems that an existing sugar alcohol composition is not easy to form and prone to water loss, hardening and discoloring are solved.

The invention relates to the field of aluminum nitride materials, and provides a preparation method of high-reliability aluminum nitride applied to an IGBT (Insulated Gate Bipolar Translator), which solves the defects of low bending strength and poor thermal shock resistance of an aluminum nitride substrate in the prior art, and comprises the following preparation steps: (1) pretreating powder; (2) tape casting; (3) discharging glue; (4) sintering; and (5) post-treatment.