25results about How to "Loose structure" patented technology

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 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.

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.

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 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 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 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 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.

This invention discloses a method for directional modification of bamboo based on a citric acid concentration gradient for softening and mechanical compensation, and the resulting directional modified bamboo. The method includes the following steps: Step 1: Pretreated bamboo raw material is immersed in a citric acid aqueous solution at room temperature to obtain citric acid-impregnated bamboo; Step 2: The citric acid-impregnated bamboo is subjected to intermittent microwave treatment in a microwave field, washed, and air-dried at room temperature to constant weight to obtain modified bamboo. The directional modification method achieves directional control of the macroscopic mechanics and microstructure of bamboo by adjusting the mass concentration of the citric acid aqueous solution in Step 1: when the target is highly flexible softened bamboo, the mass concentration of the citric acid aqueous solution in Step 1 is 25%~35%; when the target is modified bamboo with mechanical compensation, the mass concentration of the citric acid aqueous solution in Step 1 is 35%~45%. This invention can directionally meet different needs from high flexibility deformation to structural strength.

The invention belongs to the technical field of membrane separation, and discloses a composite nanofiltration membrane based on bidirectional interfacial polymerization and a preparation method and application thereof, the preparation method comprises the following steps: step 1, loading two-dimensional porous graphene on the upper surface of a porous support membrane to obtain a two-dimensional porous graphene layer / support layer composite membrane; 2, enabling the lower surface of the composite membrane to be in contact with a water-phase amine monomer solution, so that the water-phase solution infiltrates the supporting layer and is diffused upwards to the two-dimensional porous graphene layer; 3, the upper surface of the two-dimensional porous graphene layer makes contact with an organic phase monomer solution, an aqueous phase amine monomer and the organic phase monomer are subjected to an interfacial polymerization reaction in in-plane pore channels of the two-dimensional porous graphene, a porous graphene / polymer separation layer is formed, in-situ shrinkage and packaging of the in-plane pore channels of the two-dimensional porous graphene are achieved, and the composite nanofiltration membrane is obtained. The composite nanofiltration membrane provided by the invention has efficient interception and high permeation flux on antibiotics, and shows good application universality and flexibility.

The application discloses a kind of solventization electron initiation controlled radical polymerization method of cosolvent regulation, this polymerization method uses higher polymerization temperature and adds cosolvent tetrahydrofuran simultaneously to regulate, solventization electron initiation polymerization still can keep the nature of controlled radical polymerization, can prepare molecular weight precision controllable, narrow molecular weight distribution polymer, and accurate structure block, star and various topological structure polymers such as polymer.The solventization electron initiation controlled radical polymerization method of cosolvent regulation of the application, it includes the following steps: in the solventization electron initiation polymerization system of alkali metal lithium / hexamethylphosphoramide to olefin monomer, adding cosolvent, carrying out controlled radical polymerization, improve polymerization rate and obtain narrow molecular weight distribution polymer;Wherein, the cosolvent is tetrahydrofuran, the dosage of hexamethylphosphoramide is 20mL, the dosage of tetrahydrofuran is 3-6mL, and the polymerization temperature is 50-60 DEG C.

The invention belongs to the technical field of preparation of biomass fuels, and particularly relates to a mixed fuel prepared from corn straws and salix mongolica and a preparation method of the mixed fuel. The invention relates to a mixed fuel composed of corn straw and salix mongolica. The mixed fuel is obtained by mixing crushed corn straw and crushed salix mongolica according to a mass ratio of (1-3): 1 and then performing compression molding, the water content of the mixed fuel is 12%-18%; the unit density of the mixed fuel is 0.917 to 1.003 g / m < 3 >; the thickness of the interface transition layer of the mixed fuel reaches 8-15 microns; the pore size of the mixed fuel is smaller than 50 micrometers, and the mixed fuel meets the requirement of third-level fuel and is good in combustion performance.

The invention relates to an efficient preparation method of peanut protoplast, which comprises the following steps: through the procedures of yellowed seedling culture, protoplast enzymolysis, purification and resuspension, protoplast conversion and the like, in the protoplast separation process, leaf cutting, enzymatic hydrolysate optimization and a treatment mode are adopted, and vacuum-assisted enzymolysis and gradient purification technologies are combined, so that the enzymolysis time is shortened to 2 hours; a large number of protoplasts are obtained through enzymolysis, and the yield of the protoplasts is increased; the purity and the activity of the protoplast are ensured through multiple times of centrifugation, resuspension and standing; according to the method, the reagent dosage and reaction conditions are accurately controlled in the transformation process, the transformation efficiency is improved, the prepared protoplast is round, full and complete, the method provides a high-quality protoplast material for subsequent experiments such as peanut gene function research and genetic transformation, and deep development of peanut related research is promoted.

This invention discloses a method and application for extracting soluble dietary fiber from soybean residue using a pulsed electric field assisted extraction. The method includes dissolving dried, pulverized, and sieved soybean residue powder in distilled water to obtain a soybean residue liquid; subjecting the soybean residue liquid to repeated freeze-thaw cycles followed by pulsed electric field treatment; adding a compound enzyme to the pulsed electric field-treated soybean residue liquid for enzymatic hydrolysis; after enzymatic hydrolysis, inactivating the enzyme, centrifuging to collect the supernatant, and then concentrating, precipitating with alcohol, and freeze-drying the supernatant to obtain soluble dietary fiber from soybean residue. This invention employs a synergistic extraction process of repeated freeze-thaw cycles, followed by a pulsed electric field, and then compound enzymatic hydrolysis, which can effectively improve the extraction rate of soluble dietary fiber from soybean residue. The obtained soluble dietary fiber from soybean residue exhibits excellent antioxidant activity and pancreatic lipase inhibitory activity, while its physicochemical properties are significantly improved, making it suitable for use in functional foods and food additives, with outstanding industrial application value.

The invention discloses transition metal modified tobacco harm-reducing particles as well as a preparation method and application thereof. The harm-reducing particles are prepared from the following components in parts by weight through granulation and drying: 8-10 parts of tobacco raw material powder, 3-15 parts of an adsorbent, 2-20 parts of cellulose, 0.5-5 parts of a humectant, 0.1-1.5 parts of an adhesive, 3-20 parts of a wetting agent and 0.9-44 parts of a transition metal modifier. The preparation process of the harm-reducing particles comprises the steps that tobacco raw materials are subjected to heat treatment and superfine grinding to obtain tobacco raw material powder, the tobacco raw material powder and raw materials except the transition metal modifier are mixed and granulated to obtain semi-finished particles, finally, the transition metal modifier is evenly sprayed to the surfaces of the semi-finished particles, and drying is conducted to obtain the harm-reducing particles. The harm-reducing particle filter stick prepared from the harm-reducing particles provided by the invention greatly reduces harmful substances in smoke while ensuring the flavor of the smoke, and through detection, the harm-reducing particle filter stick has a more excellent harm-reducing effect compared with a cellulose acetate tow filter stick in the prior art, and especially for hydrocyanic acid, the harm-reducing effect can be reduced by 72%.

The invention belongs to the technical field of charging piles, and relates to a ceiling charging pile with an active obstacle avoidance function. Comprising a suspended ceiling plate, a multi-stage telescopic rod is fixedly connected to the suspended ceiling plate, a connecting rod is fixedly connected to the telescopic end of the multi-stage telescopic rod, the connecting rod is in ball connection with a charging box, the charging box is in sliding connection with an adapter, the adapter is provided with a charging cable, and the charging cable is fixedly connected with a charging gun. The charging gun is connected with the charging box in a plug-in mode, a monitor is fixedly connected to the connecting rod, and electric push rods distributed in a mirror image mode are fixedly connected to the charging box. According to the invention, the surrounding condition of the charging box is monitored in real time through the monitor, an alarm is given when an obstacle collides with the charging box, and the charging box deflects and rotates if the obstacle is not stopped by an alarm sound and the obstacle is in contact with the charging box, so that the structural safety of the charging box is guaranteed, and the safety of the device is improved.

The application discloses a kind of anti-expansion silicon-based negative pole and preparation method thereof, from inside to outside including foil, lithium supplement layer attached to both sides of foil, silicon-based active material layer attached to the outside of lithium supplement layer, amorphous carbon layer attached to the outside of silicon-based active material layer and the graphite layer of outermost side;The foil is porous foil, and the hole of porous foil is filled by lithium supplement layer;The thickness of amorphous carbon layer is 20-100 μm, and the area density of amorphous layer is 0.2-5 times of the area density of silicon-based negative pole coating.

The application discloses a biological preparation method of a zein film and belongs to the technical field of natural high polymer material functional modification. In the application, a reducing agent L-cysteine is used to reduce disulfide bonds in zein, so that the molecular structure is loose, and more glutamine residues are exposed. On the basis, a transglutaminase catalytic acyl transfer reaction is used to introduce epsilon-polylysine rich in primary amino groups into the protein structure, so that the protein film with high physical and mechanical properties, water-soluble stability and high antibacterial activity is prepared, and the application effect of the protein film as food preservation material is improved.

The invention discloses a neutral blocking remover for an oil-gas well and a preparation method of the neutral blocking remover, and belongs to the technical field of blocking removers. The preparation method comprises the following steps: dissolving a nonionic surfactant in water, adding a biological enzyme blocking remover and a metal chelating agent, uniformly mixing, heating, adding a dispersant, an emulsifier and a water wetting agent, and uniformly mixing to obtain the neutral blocking remover for the oil and gas well. The biological enzyme blocking remover in the formula can efficiently decompose stubborn blockages such as oil stains, organic scales and the like, so that the structures of the blockages are loose, and the metal chelating agent is further combined with metal scale ions in the blockages, so that the neutral blocking remover has a very good removal effect on multi-component complex scales. The cleaning agent is suitable for cleaning multi-component complex dirt in oil and gas wells.

This invention discloses a process for preparing modified silica from vanadium ore leaching tailings, belonging to the field of industrial waste treatment and utilization technology. The steps include: (1) non-grinding alkaline leaching of silica: vanadium ore leaching tailings are leached without grinding with sodium hydroxide and water in a certain ratio and then heated for leaching; after cooling, the residue and filtrate are obtained by solid-liquid separation, and the filtrate is water glass; (2) preparation and modification: self-composite electrolyte is added to water glass, and a new combination modifier is added, followed by acid neutralization to produce silica gel precipitate, which is dried and ground to obtain modified silica product; the electrolyte includes 60% to 80% sodium sulfate and 20% to 40% sodium carbonate by mass percentage; the modifier includes 40% to 80% hexadecyltrimethylammonium bromide and 20% to 60% sodium dodecyl sulfate by mass ratio. The process of this invention can turn the vanadium acid leaching tailings from clay vanadium ore into a valuable resource, achieving reduced treatment and resource utilization, while also producing high-quality silica products.

The application relates to a preparation method of a corn straw-based cellulose skeleton with a core-shell structure and belongs to the field of cellulose skeleton preparation methods. In order to solve the technical problem that the inherent defects of cellulose make the mechanical performance of the cellulose skeleton extracted from straw weak in the current treatment process, the following method is adopted: firstly, the stem pith is subjected to hydrothermal treatment; secondly, delignification treatment is carried out, and the cellulose skeleton is preserved in a solvent; thirdly, the cellulose skeleton is soaked in a replacement liquid, then frozen, and then continuously subjected to freeze drying. Alternatively, the corn stem pith after the hydrothermal treatment in the first step is directly subjected to high-temperature drying in an oven. The application adopts a surface densification process to make the hydrogen bond combination on the surface of the cellulose skeleton, so that a highly directional macroscopic core-shell structure straw cellulose skeleton from the micro-macro is formed. The application is used for preparing a corn straw-based cellulose skeleton with a core-shell structure.

The invention provides a surface modified cellulose fiber and a preparation method thereof, and the preparation method comprises the following steps: immersing cellulose fiber in an ionic solvent, and activating at an activation temperature of 40-60 DEG C for 10-30 min to obtain activated cellulose fiber; immersing the activated cellulose fibers into a vinyl ester modification reagent, and reacting at the reaction temperature of 40-60 DEG C for 1-3 hours to obtain grafted cellulose fibers; the grafted cellulose fiber is transferred into an anti-solvent to be fully washed and dried, the surface modified cellulose fiber is obtained, the surface modified cellulose fiber comprises a porous skin layer and a core layer from outside to inside, and a pore channel structure extending inwards from the surface is formed in the porous skin layer; hydroxyl of a cellulose molecular chain of the porous skin layer is grafted with acetyl, so that high-strength mechanical property retention and efficient functional grafting performance are achieved.