87results about How to "Increase layer spacing" patented technology

The invention relates to the technical field of formaldehyde adsorption, in particular to a preparation method of modified activated carbon for removing formaldehyde, which comprises the following steps: S1, performing acidification pretreatment on coconut shell charcoal, and grafting the pretreated coconut shell charcoal with polyethyleneimine to obtain activated carbon loaded with polyethyleneimine; s2, carrying out dipping treatment and cyclohexanol treatment on the activated carbon loaded with polyethyleneimine to obtain functionalized activated carbon; s3, reacting the magnesium-aluminum hydrotalcite with a quaternary ammonium salt solution and a sodium benzenesulfonate solution to obtain modified hydrotalcite; reacting the modified hydrotalcite with a vinyl silane coupling agent to obtain vinyl hydrotalcite; s4, the vinyl hydrotalcite and 4-amino-3-hydrazino-5-sulfydryl-triazole are subjected to a reaction, and secondary modified hydrotalcite is obtained; and S5, dispersing the secondary modified hydrotalcite and the functionalized activated carbon in water, and adding glutaraldehyde to obtain the modified activated carbon. The modified activated carbon prepared by the preparation method disclosed by the invention realizes selective recognition, efficient adsorption and catalytic degradation of formaldehyde.

The invention relates to the technical field of hydrogel, in particular to attapulgite-based hydrogel and a preparation method thereof. The hydrogel is prepared by polymerizing an alkenyl monomer and modified attapulgite, and the modified attapulgite is obtained by modifying attapulgite with branched acrylate quaternary ammonium salt. The hydrogel shows excellent water absorption, water retention and mechanical properties. The water absorption rate reaches up to 292%, the water retention capacity is excellent in the low-humidity environment, water can be kept for a long time in the drought or low-humidity environment, the continuous water supply capacity is remarkably improved, and the water retention agent is suitable for the fields of agriculture, soil improvement and ecological restoration.

The invention relates to a preparation method of a biomass hard carbon negative electrode material and application of the biomass hard carbon negative electrode material in the field of energy storage. The method comprises the following steps: carrying out pretreatment, crushing and pre-carbonization treatment on a biomass raw material to obtain a pre-carbonized material; mixing and stirring the pre-carbonized material and an acid solution, washing and drying to obtain an acid-treated hard carbon material; soaking the obtained acid-treated hard carbon material in an alkaline solution, heating and stirring, washing and drying to obtain an alkali-treated hard carbon material; mixing the obtained alkali-treated hard carbon material with a pore-forming agent, carrying out ball milling, carrying out solid-liquid separation, and carrying out high-temperature carbonization and grinding on the obtained solid phase to obtain a powder sample; and mixing the obtained powder sample with hydrofluoric acid, and carrying out hydrothermal treatment to obtain the biomass hard carbon negative electrode material. The sodium ion battery prepared by taking the biomass hard carbon negative electrode material as a negative electrode material has the characteristics of high initial coulombic efficiency, high low-voltage platform specific capacity and excellent cycle performance and rate capability.

The invention belongs to the technical field of battery materials, and particularly relates to a modified high-nickel ternary positive electrode material and a preparation method and application thereof. The preparation method of the modified high-nickel ternary positive electrode material provided by the invention comprises the following steps: 1) mixing a lithium source, a precursor, a tellurium source and a divalent metal compound, and performing first calcination to obtain a first calcined product; (2) dissolving tellurate in an organic solvent, mixing and grinding the formed tellurate organic solvent solution and the first burning product obtained in the step (1), and then carrying out second burning to obtain a second burning product; the tellurate is selected from at least one of potassium tellurite and sodium tellurite; and (3) washing the secondary calcined product obtained in the step (2) with water, mixing with boric acid, and carrying out third calcination to obtain the modified high-nickel ternary positive electrode material. Through the specific preparation method and the synergistic effect among the steps, the obtained modified high-nickel ternary positive electrode material has good specific capacity, first effect and cycle performance.

The invention relates to the technical field of battery material preparation, and provides a coal-based hard carbon negative electrode material, a preparation method thereof and a sodium ion battery. The preparation method of the coal-based hard carbon negative electrode material comprises the following steps: (I) synchronously purifying and pre-oxidizing pulverized coal and mixed acid in a solvent to obtain modified pulverized coal, wherein the mixed acid comprises hydrochloric acid, hydrofluoric acid and nitric acid; (II) the modified coal powder and starch are subjected to solid-phase mixing to obtain a first precursor, the content of amylose in the starch is 50% or above, and the mass ratio of the modified coal powder to the starch is (6-9): (1-4); (III) sequentially esterifying and pre-carbonizing the first precursor to obtain a second precursor; and (IV) carbonizing the second precursor to obtain the coal-based hard carbon negative electrode material. The coal-based hard carbon prepared by the preparation method has expanded interlayer spacing, increased pseudo graphite phase proportion and reduced specific surface area, shows high specific capacity and first coulombic efficiency when being used as a sodium ion battery negative electrode material, and can improve the carbon yield.

The invention belongs to the field of functional film material preparation, and particularly relates to a high-toughness weather-resistant barrier film and an in-situ cross-linking preparation method and application thereof.The high-toughness weather-resistant barrier film is prepared by dispersing two-dimensional layered mineral nanosheets in water and stirring the two-dimensional layered mineral nanosheets to obtain nanosheet suspension liquid; slowly adding biomacromolecular polysaccharide, stirring until the biomacromolecular polysaccharide is completely dissolved, and adding a plasticizer to obtain a membrane casting solution; pouring the film casting solution into a mold, and drying to obtain a film precursor; the film precursor is soaked and cross-linked in a metal ion salt solution coagulating bath, washing and drying are performed after cross-linking are completed, and the high-toughness weather-resistant barrier film is obtained, the composite film is good in mechanical strength, has flame retardance and gas barrier performance and can be applied to flame retardance and storage and fresh keeping of food, and the storage time of the food is prolonged; the preparation method is simple, low in cost, suitable for large-scale popularization, wide in market prospect and friendly to application environment.

The invention provides a photocatalytic barrier composite film for fresh keeping of fruits and vegetables and a preparation method thereof, and the preparation method comprises the following steps: sequentially adopting 1, 3-propane sultone and octadecyl trimethyl ammonium chloride to carry out modification treatment on nanocellulose to obtain quaternary ammonium sulfonated nanocellulose; the preparation method comprises the following steps: carrying out organic intercalation modification treatment on montmorillonite by adopting hexadecyl trimethyl ammonium bromide and caprolactam, and carrying out hydrophobic modification treatment on intercalated montmorillonite by adopting a silane coupling agent to obtain composite modified montmorillonite; the titanium precursor solution and the zinc precursor solution are sequentially dripped into the montmorillonite dispersion liquid, then aging, centrifuging, washing, drying and calcining are conducted, and load modified montmorillonite is obtained; uniformly mixing polylactic acid, quaternary ammonium sulfonated nano cellulose, the loaded modified montmorillonite, a plasticizer, a lubricant and an antioxidant to obtain a mixed material, and sequentially performing melt extrusion, cooling, pelletizing and film blowing on the mixed material to obtain the photocatalytic barrier composite film.

The invention provides an anthracite-based hard carbon sodium battery negative electrode material and a preparation method thereof, a sodium ion battery negative electrode and a sodium ion battery. The preparation method comprises the following steps: S1, activation treatment: activating anthracite powder; s2, chemical activation treatment: uniformly mixing the activated anthracite powder with an alkali solution to obtain a mixture; s3, pre-carbonization treatment: putting the mixture obtained in the step S2 in inert gas for pre-carbonization treatment; s4, sequentially carrying out acid pickling treatment on the mixture subjected to pre-carbonization treatment, then washing with water until the mixture is neutral, and drying; and S5, performing high-temperature carbonization treatment: performing high-temperature carbonization treatment on the material dried in the step S4 under inert gas to obtain the anthracite-based hard carbon sodium battery negative electrode material. The anthracite-based hard carbon sodium battery negative electrode material prepared by the invention has excellent reversible specific capacity, initial charge-discharge efficiency and rate capability when being applied to a sodium ion battery.

The invention discloses a preparation method for expanding the interlayer spacing of a two-dimensional lamellar material through self-generation of carbon dioxide by cooperation of phytic acid and urea. Hydrogen ions are ionized through phytic acid, urea is ionized, urea cations are generated, and therefore phytic acid and urea can smoothly enter the interlayer of the two-dimensional lamellar material. The phytic acid and the urea successfully react between layers of the two-dimensional lamellar material through heating to generate carbon dioxide, and the generated carbon dioxide can further enlarge the interlayer spacing of the two-dimensional lamellar material. In addition, the interlayer spacing of the two-dimensional lamellar material is enlarged, so that the two-dimensional lamellar material has a good mechanical enhancement effect and a good carbon dioxide fixing effect. When the exfoliated two-dimensional nanosheet material prepared by the method is applied to a polymer matrix, the flame retardant property and the mechanical property of the matrix can be improved.

This invention belongs to the field of hard carbon technology, specifically relating to a bamboo-based and lignin-based hard carbon composite material, its preparation method, and its applications. The process involves pretreating raw materials to obtain pretreated material; pretreating the pretreated material with an acidic oxidant to obtain acidic oxidant pretreated material; pre-oxidizing the acidic oxidant pretreated material to obtain pre-oxidized material; pre-carbonizing the pre-oxidized material under a protective atmosphere to obtain pre-carbonized material; pulverizing the pre-carbonized material to obtain pulverized material; acid washing followed by water washing to obtain purified material; soaking the purified material in acid, filtering, and drying to obtain soaked material; mixing the soaked material with a modifier, and high-temperature coating and carbonizing under a protective atmosphere to obtain bamboo-based coated hard carbon or lignin-based coated hard carbon. Mixing the two types of hard carbon and carbon coating yields a bamboo-based and lignin-based hard carbon composite material, which is used in negative electrode sheets and batteries. When applied to batteries, the hard carbon composite material of this invention can improve battery energy density.

This invention provides a hard carbon material, its preparation method, and its application. The preparation method includes the following steps: heating, mixing, and granulating a precursor, dopant, molten salt agent, and curing agent to obtain mixed particles; and carbonizing the mixed particles to obtain the hard carbon material. The preparation method of this invention, through the synergistic effect of heteroatom doping and molten salt etching, combined with mixed granulation, ensures the effectiveness of doping and etching, increases the interlayer spacing of the hard carbon material, introduces additional graphite microcrystal defects and active centers, and increases defects on the surface and edges of the carbon layer, thereby improving the cycle and rate performance of sodium-ion batteries.

The invention belongs to the technical field of membrane material preparation, and provides a preparation method and application of a hydrogen-bond-containing multi-dimensional composite material MXene (at) CE, and a mixed matrix membrane capable of efficiently separating CO2 is formed by physically blending the prepared MXene (at) CE and a polyether-polyamide block copolymer Pebax. Hydroxyl on the surface of the two-dimensional MXene nanosheet in the MXene (at) CE interacts with hydroxyl on cellulose to form a hydrogen bond. A polar environment formed by a large number of hydrogen bonds can efficiently capture CO2; the preparation process of the mixed matrix membrane is simple, reaction is controllable, raw materials are cheap and easy to obtain, and conditions are mild. The method provided by the invention has good application in separation of CO2 / CH4 mixed gas, and provides a new effective strategy for efficient separation of CO2.

The invention relates to the technical field of organobentonite, in particular to a preparation method of nanoscale organobentonite, which is characterized in that fine crushing and purification treatment is performed on bentonite raw ore powder, and specific acidizing treatment steps are combined, so that not only can impurities be effectively removed, but also high-purity nanoscale preparation of bentonite can be realized; the activity and the reaction performance of the bentonite are improved, and a foundation is laid for subsequent sodium treatment and lithiation treatment; secondly, sodium bentonite and lithium bentonite are prepared through sodium treatment and lithiation treatment respectively, then the composite bentonite is prepared through mixing, the lithiation bentonite has excellent expansibility, thickening property and suspension property in water, low alcohol and low ketone, the sodium bentonite has good dispersity and cohesiveness, and the composite bentonite is prepared through mixing the sodium bentonite and the lithium bentonite. After the two are mixed and organically modified, the advantages of the two can be integrated, and the physical properties of the bentonite are further improved, for example, the expansion multiple is increased, the viscosity is increased, and the suspension stability is enhanced.

The invention discloses a calcium sulfate whisker reinforced PVC board and a preparation process thereof, and relates to the technical field of PVC boards. The invention introduces calcium sulfate whiskers into PVC materials, and the calcium sulfate whiskers have a low density, which helps to reduce the weight of the PVC board. The calcium sulfate whiskers show excellent stability under high temperature conditions and can improve the thermal stability of PVC. The invention loads ferroferric oxide on graphene oxide, improves the flame retardancy of the graphene, and then uses chitosan to perform intercalation treatment on it, thereby increasing the interlayer spacing of the graphene loaded with ferroferric oxide, so that it has more specific surface area to load the calcium sulfate whisker-nano copper complex, improves the dispersibility of the calcium sulfate whisker-nano copper complex, and thus enhances the mechanical properties and flame retardancy of the PVC board.

The invention relates to the technical field of integrated circuit manufacturing, and discloses a low-dielectric film based on a layered compound and a preparation method and application thereof. The invention provides a layered compound: [Mx (OH) y] z + [(An-) z / n]. MH2O or [M1x1M2x2 (OH) y] z + [(An-) z / n]. MH2O, where [Mx (OH) y] z + or [M1x1M2x2 (OH) y] z + constitutes a positively charged laminate, an anion An-can be inserted by the expanded interlayer spacing; the invention further discloses a preparation method of the low-dielectric film based on the layered compound. The film has excellent dielectric properties (klt; 1.9), a low dielectric loss (lt; 0.02), the insulation property is good, and meanwhile, the excellent Young's modulus (YMgt; 20 GPa), the mechanical strength meets the requirements of a rear-end interconnection medium, and the material has a wide practical application prospect in the chip rear-end interconnection industry; meanwhile, the material can be used as a transistor insulating layer material, interface traps of a thin film transistor insulating layer and an active layer are reduced, and the carrier mobility and on-off ratio of a transistor are improved.

The invention belongs to the field of sodium ion positive electrode materials, and relates to a preparation method of a ball cactus-shaped sodium ion battery positive electrode material, which comprises the following steps: S1, carrying out wet grinding on a mixture of a sodium source, an iron source, a phosphorus source, gelatin and a carbon nanotube to obtain slurry; s2, carrying out spray drying treatment on the slurry to obtain precursor powder; and S3, calcining the precursor powder in one step in an oxygen-free environment to obtain the ball cactus-shaped sodium ferric pyrophosphate positive electrode material coated with the nitrogen-doped carbon material on the surface. The ball cactus-shaped sodium ferric pyrophosphate positive electrode material coated with the nitrogen-doped carbon material on the surface is obtained through wet grinding, spray drying and one-step calcination treatment. The ball cactus-shaped morphology can significantly increase the specific surface area, interlayer spacing and porosity of the positive electrode material, increases the contact area between the positive electrode material and an electrolyte, and can realize comprehensive improvement of conductivity, capacity, low-temperature performance, cycle performance and high-rate performance.

The present invention provides a method and application for preparing nitrogen-phosphorus co-doped MXene negative electrode material. The method comprises the following steps: firstly etching MAX raw material with hydrofluoric acid solution, washing and freeze-drying to obtain MXene material; then mixing the MXene material obtained in step (1), nitrogen source, phosphorus source and solvent to obtain a mixed solution, performing a primary calcination and a secondary calcination after gelation reaction, and cooling to obtain the nitrogen-phosphorus co-doped MXene negative electrode material. The present invention utilizes a simple nitrogen-phosphorus co-doping method to prepare nitrogen-phosphorus doped MXene material with MXene as the substrate, and uses the material in the negative electrode material of lithium-ion batteries to improve the reversible specific capacity of a single material, so that the cycle stability of the material is also improved.

The invention relates to amino acid modified red-mud-based magnesium-iron-aluminum hydrotalcite and a preparation method and application thereof.The preparation method comprises the following steps that red mud and inorganic acid are mixed and heated and leached under the stirring condition, an obtained leaching product is subjected to solid-liquid separation, and upper-layer acid leaching liquid containing iron and aluminum and residues are obtained; mixing the obtained upper-layer acid leaching solution with amino acid to obtain a mixed solution; adding magnesium salt into the obtained mixed solution, and carrying out coprecipitation reaction to obtain turbid liquid; and centrifuging, washing and drying the obtained turbid liquid to obtain the amino acid modified red mud-based magnesium-iron-aluminum hydrotalcite. Iron and aluminum elements in the red mud are directly extracted, the cost is reduced, and meanwhile the performance and the additional value of the hydrotalcite product prepared from the red mud are remarkably improved; amino acid molecules are introduced, the crystallinity, the specific surface area and the adsorption capacity of the magnesium-iron-aluminum hydrotalcite are improved, a co-precipitation reaction is adopted, the reaction temperature is low, the reaction time is short, and the prepared amino acid modified red-mud-based magnesium-iron-aluminum hydrotalcite can be used for treating phosphorus-containing wastewater.

The application belongs to the technical field of fertilizers, and particularly relates to a humic acid organic-inorganic compound fertilizer with slow release and improved fertilizer utilization rate and a preparation method thereof. The humic acid organic-inorganic compound fertilizer comprises the following raw materials in parts by weight: 22-30 parts of biogas residue, 35-55 parts of humic acid, 8-13 parts of fine columnar algae powder, 5-8 parts of urea, 12-17 parts of ammonium sulfate, 12-15 parts of superphosphoric acid calcium, 15-20 parts of potassium sulfate and 10-15 parts of slow release coating suspension. Test results show that the humic acid organic-inorganic compound fertilizer with slow release and improved fertilizer utilization rate prepared by the application can reduce the nitrogen and phosphorus release rates of the humic acid inorganic compound fertilizer, has better slow release effect, significantly promotes the plant height, stem diameter and root length of soybeans and corn, has obvious growth promotion effect, and has wide application prospect.

The invention relates to the technical field of new energy zinc-vanadium battery materials, in particular to a preparation method and application of an electrode material for a low-temperature zinc ion battery. The method comprises the following steps: mixing cobalt acetylacetonate, water and furfural, and sequentially carrying out heat treatment and centrifugation to obtain a precipitate; mixing the precipitate with a potassium hydroxide solution, and calcining for the first time to obtain a calcined material; mixing the calcined material with ammonium metavanadate and water, and sequentially carrying out hydrothermal treatment and drying to obtain a dried material; and calcining the dried material for the second time to obtain the electrode material. The V2O5 / nano flower-shaped porous carbon-based zinc ion cathode material is prepared by adopting a coupling strategy and shows relatively good cycling stability in a zinc ion battery, and more channels exist on the surface of the carbon material, so that rapid diffusion of zinc ions is promoted, the conductivity and the ionic conductivity are improved, and application at low temperature is realized.

The invention discloses a dust suppressant for railway transportation of bulk granular goods and a preparation method of the dust suppressant, and relates to the technical field of dust suppressants. The dust suppressant for railway transportation of bulk granular goods comprises the following raw material components in parts by weight: 9-10 parts of magnesium lithium silicate organic modified bentonite, 45-52 parts of modified cassava pregelatinized starch, 3-5 parts of a defoaming agent, 26-32 parts of calcium carbonate powder, 3-6 parts of a water-retaining agent, 4-6 parts of a preservative and 2-3 parts of a corrosion inhibitor. After being sprayed, the dust suppressant for railway transportation of bulk granular goods is high in strength, good in wetting permeability, large in permeation thickness and high in dust suppression efficiency, and secondary spraying is not needed in the transportation process.

This application relates to the field of energy storage materials technology, and more particularly to a titanium-based active material, its preparation method, and its application. The titanium-based active material comprises a mixed oxide having a layered perovskite structure, the mixed oxide having the general chemical formula shown in Formula 1, M... 2± a La x‑y M1 y B n‑z M2 Z O (3n+1)‑δ Q δ Formula 1; in Formula 1, the M site includes H and / or an alkali metal element; the M1 site includes at least one of Mg, Ca, Sr, Ba, and rare earth elements; the M2 site includes a specified transition element and at least one of Al, Ga, In, Si, Sn, Sb, and Bi; the Q site includes at least one of F, Cl, Br, I, N, and S; the B site satisfies: Nb 2n‑3x‑z Ti 3x‑n Or Nb 2n‑3x Ti 3x‑n‑z This titanium-based active material possesses high energy density, ultra-fast charging capability, long cycle life, and intrinsic safety.

The invention relates to the technical field of batteries, in particular to a negative electrode material, a preparation method thereof and a battery. The negative electrode material comprises a substrate and a carbon coating layer coating at least part of the surface of the substrate, wherein the matrix comprises hard carbon, the hard carbon is a biomass-based hard carbon material, the hard carbon contains a C element and an O element, and the atomic ratio of O to C is (1: 20)-(1: 10). The preparation method of the negative electrode material comprises the following steps: soaking a pretreated biomass material in a chloride solution, and sintering to obtain a hard carbon precursor; the preparation method comprises the following steps: mixing a hard carbon precursor with an acidic solution, adding peroxydisulfate, mixing, separating and drying to obtain a hard carbon material containing an epoxy group; and carrying out carbon coating treatment on the hard carbon material containing the epoxy group, and forming a carbon coating layer on at least part of the surface of the hard carbon to obtain the negative electrode material. The capacity and the dynamic performance of the negative electrode material can be improved, and the capacity, the first efficiency and the cycle performance of the battery are improved.

The invention provides graphene, a preparation method thereof and graphene slurry. The preparation method of the graphene comprises the following steps: obtaining graphite; carrying out acid treatment on the graphite to disperse the graphite in concentrated sulfuric acid to obtain a graphite dispersion liquid; carrying out oxidation treatment on graphite to enable the graphite dispersion liquid to be sequentially mixed with potassium permanganate and hydrogen peroxide for reaction, and carrying out suction filtration to obtain graphene oxide; carrying out solvation treatment on the graphene oxide, and adding the graphene oxide into a strong-polarity aprotic solvent to carry out purification modification, so as to obtain pretreated graphene oxide; and carrying out reduction operation on the pretreated graphene oxide. According to the preparation method of the graphene, the preparation of the graphene with relatively high conductivity and relatively good dispersion stability can be realized.

The invention relates to the technical field of batteries, in particular to a graphite composite material and a preparation method and application thereof. The graphite composite material comprises a base material layer and a coating layer, and the coating layer comprises a first material layer and a second material layer; the base material layer comprises graphite; the first material layer comprises an amorphous carbon material, and the amorphous carbon material is doped with a first nitrogen element; the second material layer comprises a graphite material, and the graphite material has a porous structure and is doped with a second nitrogen element; the concentration of the first nitrogen element is greater than that of the second nitrogen element. According to the graphite composite material, the first material layer can ensure the reversible capacity and the rate capability of the material; the graphitization degree of the carbon material in the second material layer is high, the irreversible capacity can be reduced, the low nitrogen concentration is beneficial to improving the conductivity, and the porous structure can shorten an ion diffusion channel, so that the energy storage capacity and the rate capability are improved.

The application belongs to the field of nanomaterials and electrocatalysis, and specifically designs a single-atom electrocatalyst, which is formed by carbonizing a precursor mixed with nitrogen-containing organic matter and transition metal salt in a way parallel to single-atom generation. The nitrogen-doped carbon nanosheet prepared from the metal salt has the characteristics of rich pore structure, large specific surface area and high graphitization degree, and can capture single-atom metal to form a single-atom catalyst. In the preparation process, the transition metal salt acts as a template, a metal source and a pore-forming agent, and has a catalytic effect on the formed carbon material, thereby improving the graphitization degree of the carbon material. The single-atom catalyst prepared by the application has a high specific surface area and a developed pore size structure, which improves the exposure rate of active sites, and the carbon with a high graphitization degree not only improves the conductivity but also improves the corrosion resistance of the catalyst in an alkaline environment, thereby improving the stability of the catalyst.

The invention discloses a nickel-selenium co-doped molybdenum disulfide catalyst loaded on carbon paper, and a preparation method and application thereof. The preparation method first prepares nickel-doped molybdenum disulfide (Ni-MoS2) and NaHSe solutions respectively. A nickel source, a molybdenum source and a sulfur source are stirred evenly in deionized water and then placed in a polytetrafluoroethylene-lined autoclave containing clean carbon paper for hydrothermal reaction to obtain a Ni-MoS2 catalyst; in an inert atmosphere, selenium powder and sodium borohydride are completely reacted in anhydrous ethanol, and then deionized water is added to obtain a NaHSe solution. The NaHSe solution is transferred to a polytetrafluoroethylene-lined autoclave containing Ni-MoS2 for solvothermal reaction to obtain a nickel-selenium co-doped molybdenum disulfide catalyst loaded on carbon paper, and applied to an electrocatalytic hydrogen evolution reaction. This method has the characteristics of simple preparation, low cost and environmental friendliness.

The invention discloses a fireproof flame-retardant plastic and a preparation method thereof, and relates to the technical field of plastics. The modified flame retardant is innovatively added into the polyolefin plastic, so that efficient flame-retardant and fireproof effects are achieved. The modified flame retardant is prepared by coating and modifying layered hydroxides with prepolymers of 1, 2-diallyl phthalate and diallylmalonic acid when ferric nitrate and chromic nitrate are subjected to coprecipitation to generate layered hydroxides, and has the effects of inhibiting smoke diffusion and blocking oxygen, so that the flame-retardant and fireproof effects are realized, and meanwhile, the flame-retardant and fireproof effects are realized. When the plastic is subjected to shrinkage or external stress caused by high temperature, the layered structure can be used as a stress dispersion center, so that the plastic can still keep relatively good mechanical properties at high temperature, and a molecular skeleton of the polymer contains a plurality of rigid benzene rings, so that the stability in a high-temperature environment can be improved, and the flame-retardant and fireproof effects of the plastic can be enhanced.

This invention relates to the field of zinc-ion battery technology, and more particularly to a zinc-ion battery using vanadium pentoxide as the positive electrode material and its activation method. The activation method for a zinc-ion battery using vanadium pentoxide as the positive electrode material involves charging and discharging the battery at a temperature of 50-70°C. This invention performs a long-cycle rapid activation process in an oven at 50-70°C, altering the interlayer structure of vanadium pentoxide, thus expanding the interlayer spacing. This allows the vanadium pentoxide to exhibit an initial discharge specific capacity of 335 mAh / g in just two cycles at a current density of 0.2 A / g. This invention has advantages such as short reaction time, rapid capacity increase, and stable performance. When applied to the preparation of positive electrode materials for aqueous zinc-ion batteries, it can significantly improve production efficiency and material performance.

The invention relates to the technical field of magnesium phosphate cement materials, and particularly discloses a magnesium potassium phosphate cement-based material with high compactness and high salt corrosion resistance and application of the magnesium potassium phosphate cement-based material. The magnesium potassium phosphate cement-based material is prepared from the following components in parts by weight: 30 to 40 parts of dead burned magnesium oxide, 15 to 20 parts of monopotassium phosphate, 3 to 5 parts of retarder, 0.01 to 0.03 part of crystalline phosphate, 30 to 40 parts of fine aggregate and 8 to 13 parts of mixing water. Wherein the molecular formula of the crystalline phosphate is KNaMg2 (PO4) 2.14 H2O. By introducing the crystalline phosphate in a special structural form, the hydration evolution path and the microstructure of the magnesium potassium phosphate cement-based material in a salt erosion environment are effectively improved, and the salt erosion resistance is remarkably improved.