365results about How to "Reduce solubility" patented technology

The invention provides a positive electrode material and a preparation method thereof, a positive electrode plate and a battery, the positive electrode material comprises lithium manganese iron phosphate particles, a first shell layer and a second shell layer, the first shell layer and the second shell layer sequentially coat the surfaces of the lithium manganese iron phosphate particles, the material of the first shell layer comprises nanoscale SiO2 particles, and the material of the second shell layer comprises nanoscale TiO2 particles. The surfaces of the lithium manganese iron phosphate particles are sequentially coated with the SiO2 layer and the TiO2 layer, so that the contact between the lithium manganese iron phosphate particles and an electrolyte can be reduced, the side reaction between the lithium manganese iron phosphate particles and the electrolyte in the electrochemical reaction process is reduced, the cycle life attenuation of the battery is relieved, the dissolution of Mn element is reduced, and the service life of the battery is prolonged. Therefore, the battery impedance increase caused by deposition of Mn < 2 + > on the negative electrode in the circulation process is relieved.

The preparation method of the composite soybean protein gel comprises the following steps: adjusting the pH value of an egg white protein solution, carrying out heat preservation, adding protein glutaminase to carry out hydrolysis reaction, centrifuging, collecting supernate, and freeze-drying to obtain deamidated egg white protein; adding TG enzyme into the soybean protein isolate and deamidated egg white protein solution for enzymatic cross-linking reaction, centrifuging after enzyme deactivation, collecting supernate, and freeze-drying to obtain compound protein powder; dissolving the composite protein powder in water, stirring, and heating to form composite soybean protein gel; according to the preparation method disclosed by the invention, glutamine in the egg white protein is hydrolyzed by using the protein glutaminase, so that only the site of lysine is reserved, and then TG enzyme treatment is performed, so that the crosslinking of the egg white protein is avoided, and the content of disulfide bonds in the soybean protein is increased, thereby remarkably improving the gel strength and compression resistance of the composite soybean protein thermal gel.

The invention discloses a short-process preparation method and application of a vanadyl sulfate electrolyte based on vanadium slag valence regulation and control, and belongs to the technical field of vanadium electrolytes. The method comprises the following steps: leaching the vanadium slag by using sulfuric acid to obtain a leaching solution containing low-valence vanadium; extracting vanadium and chromium in the leachate by adopting an amine organic extraction agent; carrying out reverse extraction by using sulfuric acid; the method comprises the following steps of: firstly, extracting and separating vanadium by using a phosphoric acid extracting agent, and finally, carrying out reverse extraction by using sulfuric acid to obtain the vanadium electrolyte which can be used for constructing a VFB-5kW / 10kWh vanadium battery energy storage system. The traditional established thinking that pentavalent vanadium is extracted through vanadium slag oxidation to serve as a vanadium source to prepare the vanadium electrolyte is broken through, the novel technology for extracting the low-valence vanadium solution from the vanadium slag to directly prepare the vanadium electrolyte is provided, the short-process and green novel technology for preparing the vanadium electrolyte from the vanadium slag is constructed, the efficiency of the vanadium electrolyte preparation technology is improved, and the preparation cost is reduced.

The invention provides a positive electrode material and a preparation method thereof, a positive electrode plate, a battery and an electric device. The preparation method of the positive electrode material comprises the following steps: preparing a layered oxide internal core material, wherein the layered oxide internal core material is a layered oxide containing sodium and transition metal; preparing a polyanion external coating material, wherein the polyanion external coating material comprises sodium ferromanganese pyrophosphate; and fusing the layered oxide internal core material and the polyanion external coating material in a mechanical fusion manner to obtain the positive electrode material with the layered oxide and polyanion compounded core-shell structure. The positive electrode material comprises a layered oxide internal core material and a polyanion external coating material; the core material in the layered oxide comprises Na1 + xMO2, X is more than or equal to-0.3 and less than or equal to 0.2, and M comprises at least one of Fe, Ni, Cu, Zn, Co, Ti and Mn; and the external coating material of the polyanion system comprises Na < 4 > Fe < 3-y > Mn < y > (PO4) < 2 > P < 2 > O < 7 > / C.

The invention relates to the technical field of secondary batteries, in particular to a high-voltage-resistant lithium ion battery electrolyte. The electrolyte comprises a solvent, a lithium salt, a non-polar diluent and a chalcogenide additive represented by a formula (1), (2) or (3). Wherein the solvent comprises a carbonic ester solvent; the lithium salt is dissolved in the solvent; the mass fraction of the non-polar diluent in the electrolyte is 21%-60%; the mass ratio of the sulfur additive to the non-polar diluent is (1: 200)-(1: 10). The electrolyte provided by the invention can improve the cycle capability of the lithium ion battery and ensure that other performances of the lithium ion battery are kept stable. # imgabs0 #

The invention discloses an organic carbonyl compound electrode material, a preparation method and application of the organic carbonyl compound electrode material in a lithium ion battery, and the organic carbonyl compound electrode material is bipyridino [3 ', 2': 5, 6; the invention relates to an organic carbonyl compound electrode material, which is prepared from 2, 2 ', 3': 7, 8] quinoxaline [2, 3-i] bipyridino [3, 2-a: 2 ', 3'-c] phenazine-10, 21-diquinone and 1, 2, 4, 5-tetraamino p-benzoquinone and 1, 10-phenanthroline-5, 6-diketone through a dehydration condensation reaction. When the organic electrode material is used as a positive electrode material to be applied to a lithium ion battery, due to the fact that the organic electrode material contains a large conjugated system, the organic electrode material has good dissolution inertness in electrolyte and is beneficial to electron transmission, and therefore the cycling stability and the rate performance of the battery are improved. In addition, multiple active sites provide more redox active sites to coordinate with lithium ions, so that reversible lithium storage is realized, and relatively high capacity is shown.

The invention discloses an acrylate finishing emulsion and a preparation method thereof, and the acrylate finishing emulsion comprises the following components in parts by mass: 18-30 parts of styrene, 5-15 parts of methyl methacrylate, 1-5 parts of 2-ethylhexyl acrylate, 5-14 parts of butyl acrylate, 0.5-1 part of acrylic acid, 0.6-1.2 parts of acrylamide, 0.8-2 parts of a high-density crosslinking monomer, 0.2-0.5 part of an initiator, 0.7-1 part of an emulsifier and 50-60 parts of water. 0.1-0.5 part of an oxidant, 0.1-0.5 part of a reducing agent, 1-5 parts of a pH regulator and 10-20 parts of an inorganic material; after the emulsion is coated to form a film, the hardness, the water resistance, the stain resistance, the low-temperature stability and the temperature change resistance are remarkably improved, and the acrylate emulsion with high hardness, high water resistance and high stain resistance can be prepared.

The invention discloses a method and a device for preparing an oxygen-free copper pipe from regenerated copper, a corrosion-resistant copper pipe and a casting process, and belongs to the field of copper treatment, and the corrosion-resistant copper pipe has the oxygen element content of less than 5 ppm, the hydrogen element content of less than 0.3 ppm, the phosphorus element content of 0.1-0.3% and the balance of copper element; the method for preparing the oxygen-free copper pipe through the regenerated copper comprises the steps that S1, molten copper in a shaft furnace is heated to the set temperature, the concentration of reducing gas in the shaft furnace is adjusted, the oxygen element content of the molten copper in the shaft furnace is increased to be larger than 30 ppm, and primary impurity removal is conducted; s2, the molten copper in the shaft furnace is sequentially introduced into a chute, a refining furnace, a standing furnace and a casting furnace, the temperature of the molten copper in the chute, the refining furnace, the standing furnace and the casting furnace is gradually decreased, inert gas and reducing gas are introduced into the chute, the refining furnace, the standing furnace and the casting furnace, and the flow and pressure of the inert gas and reducing gas introduced into the chute, the refining furnace, the standing furnace and the casting furnace are gradually decreased; and performing secondary impurity removal. The method is mainly used for preparing the oxygen-free copper pipe through the regenerated copper and preparing the corrosion-resistant copper pipe.

The invention discloses a silicone oil-based magnetic liquid with low volatility and radiation resistance as well as a preparation method and application thereof, and relates to the technical field of nuclear reactors. The silicone oil-based magnetic liquid comprises nano magnetic particles, a modifier, a surfactant and a base carrier liquid, the nano magnetic particles are changed from water solubility to oil solubility under the action of the modifier, the surface of the nano magnetic particles modified by the modifier is coated with the surfactant, and the base carrier liquid comprises polymethylphenyl siloxane fluid. The silicone oil-based magnetic liquid prepared by the invention has the advantages of chemical inertness, thermal stability, oxidation resistance, low vapor pressure, low ignition point and the like of conventional silicone oil, also has better high temperature resistance, radiation resistance, lubricating property and dissolving property, has the working temperature of-50 DEG C to 250 DEG C, and is excellent low-volatility and radiation-resistant silicone oil-based magnetic liquid.

The invention discloses a comprehensive utilization method of high-salinity wastewater produced by hydrometallurgical treatment of bastnaesite, which comprises the following steps: A, mixing alkaline wastewater and acidic wastewater, neutralizing and clarifying to obtain calcium fluoride and sodium chloride wastewater; b, mixing the sodium chloride wastewater with the precipitation wastewater, adding lime water in an aeration manner to adjust the pH value, hydrolyzing heavy metal ions in the wastewater, and performing solid-liquid separation to obtain filter residues and filtrate which is sodium chloride high-salinity wastewater; and C, adding oxalic acid into the sodium chloride high-salinity wastewater, stirring, standing, carrying out solid-liquid separation, pressurizing, concentrating, recovering hydrochloric acid, and crystallizing to obtain a crystal substance, namely a sodium chloride product. According to the method, fluorine in the wastewater is removed firstly, then the wastewater is recovered into wastewater containing sodium chloride, oxalate is dissolved into the high-salinity wastewater to separate out sodium oxalate and recover hydrochloric acid, so that the content of sodium chloride in the system is greatly reduced, and the recovery efficiency of sodium ions in the wastewater is improved.

The invention discloses a preparation method of a cement-based structured electrolyte with high ion conductivity and the electrolyte, and the preparation method comprises the following steps: mixing a polymer solution, cement and fine sand to obtain a polymer-cement paste; and performing low-temperature closed maintenance on the polymer-cement paste, and standing at room temperature to obtain the cement-based structured electrolyte. The controlled phase separation technology is adopted, elastic phase separation of a polymer network is carried out earlier than cement hydration, cement becomes a framework of the polymer network in a self-adaptive mode in the hydration process, the interface of the polymer network and the cement is good, and a continuous high-conduction ion channel can be formed; and the preparation process is simple to operate and high in repeatability.

The invention relates to the technical field of oil well paraffin removal and prevention, and discloses a paraffin removal and prevention agent for an oil well shaft and a preparation process. The paraffin remover and inhibitor for the oil well shaft comprises the following components in parts by weight: 10-25 parts of a compound surfactant, 15-30 parts of a mutual solvent, 5-10 parts of a stabilizer, 1-10 parts of a novel wax crystal improver, 0.2-0.5 part of a rapid penetrant, 0.5-1.5 parts of alkali and 25-70 parts of water, the novel wax crystal improver has a structure similar to that of paraffin, and wax crystals can be dissolved in the novel wax crystal improver, so that the wax crystals are not easy to gather and deposit on a pipe wall, and the dissolution rate of the wax crystals is further improved; sodium sulfonate in the structure has strong polarity and hydrophilicity, can adjust the crystallinity of paraffin inhibitor molecules, has a synergistic effect with asphalt, colloid and the like in crude oil, reduces the surface tension of water, has a good wetting effect, and improves the low-temperature fluidity of the crude oil.

The invention discloses a flame-retardant eutectic polymer electrolyte based on in-situ polymerization, a preparation method and a solid-state lithium battery, and belongs to the technical field of lithium battery polymer electrolytes.The preparation method comprises the following steps that in the inert gas atmosphere, an amide hydrogen bond donor and alkali metal salt are evenly mixed, and a mixture is obtained; the eutectic electrolyte is obtained by utilizing the interaction of Li-N and Li-O; adding a functional additive, an ester polymer monomer and an initiator into the eutectic electrolyte, and uniformly mixing to obtain a precursor solution; and injecting the precursor solution into a diaphragm in a lithium ion battery to be assembled, sealing, and performing in-situ free radical polymerization reaction to form the flame-retardant eutectic polymer electrolyte, thereby obtaining the solid-state lithium battery of the flame-retardant eutectic polymer electrolyte based on in-situ polymerization. The eutectic polymer electrolyte disclosed by the invention has a flame-retardant property, the safety of the lithium battery is greatly improved, meanwhile, the eutectic polymer electrolyte has high ionic conductivity, the rate capability of the battery is improved, and stable long circulation of the assembled solid-state lithium battery is realized.

The invention relates to a GH5605 cobalt-based high-temperature alloy and a manufacturing method thereof, and belongs to the technical field of metal smelting. The GH5605 alloy comprises the following chemical components: 0.05%-0.15% of C, less than or equal to 1.0% of Si, 1.0%-2.0% of Mn, less than or equal to 0.03% of S, less than or equal to 0.03% of P, 19.0%-21.0% of Cr, 9.0%-11.0% of Ni, 14.0%-16.0% of W, less than or equal to 3.0% of Fe and the balance of Co and other inevitable impurities. According to the manufacturing method, the GH5605 electrode bar is smelted through a vacuum induction furnace, refining and argon protection processes are adopted, and it is ensured that the Mn element content of the electrode bar is qualified. And in the vacuum consumable remelting process, argon with the pressure of 2000-3000 Pa is filled, so that the vacuum degree is reduced, Mn element volatilization is effectively inhibited, and section component uniformity is achieved. Detection shows that the Mn content at the edge, the 1 / 2 radius and the central part of the steel ingot meets the technical standard. The process is simple and efficient, the quality of molten steel is not affected, the performance consistency and production stability of the GH5605 steel ingot are remarkably improved, and the process is suitable for the high-end application field.

The invention discloses a plasma-assisted liquid metal self-activation method and application thereof.The self-activation method comprises the steps that patterned liquid metal photoresist is subjected to plasma treatment, hydrophilic groups are introduced into liquid metal nanoparticles and a silicon substrate, and then an elastomer solution is directly poured on a micro-scale liquid metal pattern; and when the elastomer film is stripped from the silicon substrate, due to the interaction of hydrophilic groups, the adhesive force and cohesion between the liquid metal nanoparticles and the silicon substrate and between the liquid metal nanoparticles are enhanced, so that the local stress concentration is enhanced, and the discrete particles are more easily broken and fused to form a conductive path. This process maintains high quality of the lithographically defined microscale liquid metal pattern while converting it from an insulator to a high conductor.

The invention discloses a method for preparing a manganese sulfate crystal by using manganese carbonate ore. The preparation method of the manganese sulfate crystal comprises the following steps: leaching manganese carbonate ore by using sulfuric acid to obtain a leaching solution, precipitating the leaching solution by using a heavy removing agent to remove heavy metal ions, neutralizing redundant sulfuric acid in the leaching solution, introducing a precipitating agent, reacting with the precipitating agent to obtain a precipitate, washing the precipitate with water to remove impurities, and dissolving by using sulfuric acid to obtain the manganese sulfate crystal. And after dissolving, precipitating a small amount of residual calcium and magnesium ions by using fluoride, filtering to obtain fluorine-containing manganese sulfate filtrate, finally adding a fluorine removal agent for solid-liquid separation, and evaporating and crystallizing the filtrate to obtain manganese sulfate crystals. The manganese sulfate crystal is suitable for production of a lithium ion battery positive electrode material. According to the preparation method of the manganese sulfate crystal, the impurity removal cost is greatly reduced. The invention also discloses a method for preparing manganous-manganic oxide from manganese carbonate ore. The tap density of the manganous-manganic oxide is greater than 2.3 g / cm < 3 >, the specific surface area is less than 3m < 2 > / g, and the requirement of a battery-grade material is met.

The invention discloses epigallocatechin gallate starch nanoparticles as well as a preparation method and application thereof, and belongs to the technical field of medicinal chemistry. According to the method, high-proportion branched-chain cassava starch is used as a raw material, ultrasonic microwave assistance is adopted, in the nanometer starch alcohol precipitation process, epigallocatechin gallate is synchronously packaged to form nanometer-level epigallocatechin gallate starch nanometer particles, and embedding of epigallocatechin gallate is completed. The embedding rate of the epigallocatechin gallate starch nanoparticles can reach 50.20%, the drug loading capacity can reach 311mg / g, the drug slow release performance is obvious in the process of simulating gastrointestinal digestion, the sustained release time can be 20 hours, the drug release capacity can reach 72.33% and 90.10% respectively, and the preparation process is simple, easy to operate, low in preparation cost and suitable for large-scale production and application.

The invention relates to a method for improving the strength and plasticity of an additive manufacturing titanium alloy through Si. The method comprises the following steps: (1) mixing silicon source powder and titanium source powder to obtain mixed powder; (2) taking ball-milling mixing as an example: carrying out ball-milling mixing on the prepared mixed powder under the protection of argon; and (3) the mixed powder obtained after ball milling is subjected to a forming process, and a titanium alloy block is obtained. The forming process is additive manufacturing and comprises a direct laser deposition technology, a laser powder bed melting technology and the like. According to the method, the strength and plasticity of the titanium alloy are greatly improved without heat treatment.

The invention relates to the technical field of fused alumina zirconia bricks, in particular to a fused alumina zirconia refractory brick and a preparation technology.The fused alumina zirconia refractory brick is prepared from, by weight, 55-65 parts of alumina powder, 25-35 parts of zircon sand, 1-5 parts of modified nanometer alumina powder, 2-6 parts of binder, 1-2 parts of chromic oxide, 1-3 parts of yttrium oxide and 1-4 parts of fluxing agent. Through in-situ growth of a layer of carbon nanotube core-shell structure on the surface of nano-alumina, the core-shell structure can prevent direct contact between nano-alumina particles, so that the possibility of nano-alumina agglomeration is reduced, and nano-alumina is uniformly distributed in the corundum amorphous refractory brick. A finer dispersed phase is formed in the brick body, so that the expansion of cracks is hindered, and the toughness and the strength of the brick body are improved.

The invention discloses a preparation method of a crystalline silicon solar cell. The preparation method comprises the following steps: arranging a function adjusting layer on and / or in a passivation dielectric layer; electrode slurry is printed on the passivation dielectric layer and corresponds to the position of the function adjusting layer; sintering to form a metal electrode; the function adjusting layer comprises at least one of compounds containing specific cations, the compounds containing the specific cations can release the specific cations at the sintering temperature, and the specific cations are cations corresponding to elements involved in the glass network formation. According to the preparation method, minority carrier recombination can be effectively reduced, the passivation effect of the battery is improved, and the conductivity of the metal electrode is effectively improved.

The invention discloses a glue supply device of an automatic fiber umbrella rib gluing device, and relates to the technical field of umbrella rib glue coating. Comprising a glue supply mechanism, and the glue supply mechanism comprises a quantitative glue supply assembly, a glue pushing assembly and a glue feeding assembly; the quantitative glue supply assembly comprises a glue bearing barrel, a glue inlet pipe fixedly communicated with the glue bearing barrel and a first liquid one-way valve connected to the glue inlet pipe, and the glue inlet pipe is externally connected with a glue pool. The movable glue head is arranged, the glue pumping holes of the moved glue head all face the lower total glue groove in the corresponding side, the glue in the glue pool is quantitatively pushed into the glue bearing cavity through the quantitative glue supply assembly, and the glue is finally pumped out through the glue pumping holes after being pressurized through the glue pushing assembly, so that the kinetic energy loss caused by blocking of a mold cavity wall to the glue in the prior art is reduced, and the production efficiency is improved. Therefore, the flowing speed of the rubber in the flowing channel on the outer side of the rubber after mold closing is increased, the flowing speed of the rubber in the rubber coating channels transversely distributed on the two sides is increased, the curing time of rubber coating blocks formed by the rubber coating channels is shortened, and the production efficiency is improved.

The invention belongs to the technical field of azeotropic distillation and dehydration of isopropanol, particularly relates to an azeotropic distillation and dehydration method of industrial-grade isopropanol, and aims to solve the problems that the energy consumption of separation of isopropanol and solvents is high, the energy consumption is low and the like due to the fact that solvents such as benzene and cyclohexane are adopted for azeotropic distillation and dehydration in the conventional isopropanol dehydration process, but the boiling points of benzene and cyclohexane are close to those of isopropanol. In order to solve the problems that when diethyl ether is used as an azeotropic agent, the solvent is easily enriched at the tower top to form potential safety hazards, and when the solvents are used for azeotropic distillation, the requirements of electronic chemicals cannot be met, the following scheme is provided: the method comprises the following steps: S1, adding an industrial-grade isopropanol raw material into an azeotropic distillation tower; the azeotropic dehydrating agent disclosed by the invention is small in boiling point, high in ignition point, non-corrosive, low in price, good in safety and low in separation energy consumption, and has excellent application value and application prospect in industrial production and experiments, the used device is simple and easy to operate, the yield is high, and automatic production can be realized.

The invention provides a preparation method of a medium-thin plate AZ31B magnesium alloy high-toughness welding joint, and relates to the technical field of welding. The welding groove is in a Y shape, the groove angle of a welding joint is 60 degrees, the truncated edge size is 1.5 mm, the root gap is 0.5-1 mm, oil stain and oxidation film cleaning is carried out before welding, then assembling is carried out, single-face single-pass welding or single-face double-layer double-pass welding is carried out on an AZ31B test plate, and artificial aging treatment is carried out after welding. The preparation method of the medium-thin plate AZ31B magnesium alloy high-toughness welding joint overcomes the defects in the prior art, does not need a liner or back argon protection, is simple to operate, low in manufacturing cost and high in production efficiency, and can be suitable for welding production and manufacturing of various product structural forms.

The invention provides a modified oxygen-releasing nano peroxide for degrading organic pollutants, a composite oxygen-releasing material, a preparation method and an application. The modified oxygen-releasing nano peroxide comprises an oxygen-releasing nano peroxide, a pH regulator, a polyvinyl alcohol-poly (N-isopropylacrylamide) membrane layer and a cross-linked chitosan membrane layer, the polyvinyl alcohol-poly (N-isopropylacrylamide) membrane layer wraps the oxygen-releasing nano peroxide and the pH regulator, and the cross-linked chitosan membrane layer wraps the oxygen-releasing nano peroxide and the pH regulator. The polyvinyl alcohol-poly (N-isopropylacrylamide) film layer is coated with the cross-linked chitosan film layer. The modified oxygen-releasing nano peroxide is high in purity and good in dispersity, the content of dissolved oxygen in a water body can be kept stable for a long time, and the influence on the pH value of the environment is small.

The invention discloses a modified struvite and a preparation method thereof, wherein the surface of the struvite is modified by lignin sulfonate, and at least 85% of the particle size distribution is between 1 and 10 μm. The slurry formed by the modified struvite and water has excellent film-forming properties, can more easily adhere to the surfaces of various substrates and oily leaves to form a dense and uniform fireproof coating, maximizes the contact area with the attached object, and improves the flame retardant effect of the struvite.

A liquid crystal composition contains a side chain type polymer liquid crystalline compound which can form a light absorption anisotropic film having a high alignment degree and has excellent solubility in a general-purpose solvent, a light absorption anisotropic film obtained using the composition, a laminate, and an image display device. The composition includes: a side chain type polymer liquid crystalline compound; and a dichroic substance, in which the compound is a copolymer having a repeating unit (1) containing a mesogenic group with a molecular weight of greater than 280 and a repeating unit (2) with a molecular weight of 280 or less, a content of the repeating unit (2) is less than 14% by mass with respect to a total mass of the compound, and a content of the dichroic substance is greater than 2% by mass with respect to a total solid content of the composition.

The invention discloses a method for preparing iron phosphate and aluminum oxide by utilizing step-by-step leaching of red mud, which comprises the following steps: (a) carrying out ore grinding treatment on the red mud to obtain red mud powder with preset fineness; (b) adding the red mud powder into mixed acid, carrying out acid leaching treatment at 30-50 DEG C, carrying out ultrasonic treatment assisted in the acid leaching process to obtain a leaching mixed solution, and carrying out solid-liquid separation on the leaching mixed solution to obtain leaching residues and a leaching solution containing iron and aluminum ions; the mixed acid is a mixed solution of hydrochloric acid, oxalic acid and phosphoric acid, the molar ratio of hydrochloric acid to oxalic acid is (2-5): (2-5), and the ratio of the amount of phosphoric acid substance to the amount of iron substance in the red mud is (0.9-1.2): 1; the molar concentration of H < + > in the mixed acid solution is 4-10 mol / L; (c) adjusting the pH value of the leachate, carrying out auxiliary stirring reaction under a set temperature condition, and then aging and filtering to obtain crude iron phosphate and filtrate; (d) calcining the crude iron phosphate, and cooling to obtain battery-grade iron phosphate; (e) adjusting the pH value of the filtrate, carrying out auxiliary stirring reaction under a preset temperature condition, and then aging and filtering to obtain aluminum hydroxide precipitate; and (f) calcining the aluminum hydroxide precipitate, and cooling to obtain the aluminum oxide.

The invention belongs to the technical field of modified polyvinyl alcohol (PVA) sizing agents used for textile warp sizing, and discloses a preparation method of anionic PVA textile sizing agents, which comprises the following steps: firstly treating PVA raw materials with a sodium hydroxide solution to generate sodium polyvinyl alcohol; then, sodium polyvinyl alcohol reacts with an etherifying agent halogenated acetic acid to generate carboxymethyl etherified PVA; according to the method disclosed by the invention, non-ionic PVA can be modified into anionic carboxymethyl PVA, and the anionic carboxymethyl PVA can be efficiently adsorbed by a common cationic adsorbent, so that recycling of PVA slurry in the desizing waste liquid is realized, damage of the desizing waste liquid to a water environment can be greatly reduced, and the method has relatively great application potential.

The invention discloses a printing process of a brocade-cotton blended camouflage fabric. The production process comprises the following steps: pretreatment, printing, steaming and baking, reduction soaping and color fixation, sizing, tentering and color fixation, preshrinking and the like. The camouflage printed fabric prepared by the process has the advantages of color fastness to light (dark color grade 6 or more and light color grade 5 or more), composite color fastness to light and sweat (grade 4-5), color fastness to dry rubbing (grade 4-5), color fastness to wet rubbing (grade 2.5-4), color fastness to washing (grade 4-5), color fastness to perspiration (grade 4-5) and color fastness to hot pressing (grade 4-5), excellent color fastness and uniform color fixation. Meanwhile, the produced camouflage fabric can control the reflectivity of light rays in a near-infrared light region (760-1200 nm) within a required range, so that the fabric has excellent infrared monitoring prevention performance and camouflage effect. The seven-color camouflage fabric printing is achieved, colors are richer, the camouflage effect is better, and the requirements of military garments are better met.

The invention belongs to the technical field of electrolyte, and particularly relates to ester electrolyte of a sodium-sulfur battery and a preparation method and application of the ester electrolyte, the ester electrolyte comprises a first solvent, a second solvent and sodium salt, the first solvent is ethyl trifluoroethyl carbonate, bis (2, 2, 2-trifluoroethyl) carbonate or 2, 2, 2-trifluoroethyl trifluoroethyl ester; and the second solvent is fluoroethylene carbonate, can inhibit dissolution and shuttling of polysulfide, and can also form a NaF-rich SEI film on the sodium negative electrode to inhibit growth of sodium dendrites.