198results about How to "Dissolution inhibition" patented technology

The invention relates to the technical field of wood corrosion prevention and corrosion resistance treatment, in particular to a preparation process of a coating for improving the antibacterial and corrosion-resistant performance of wood. In order to improve the antibacterial and corrosion-resistant capabilities of the prepared coating, a corrosion-resistant antibacterial agent is prepared and added into the raw materials of the coating, and quaternary ammonium salt, guanidyl and other group structures are introduced into the corrosion-resistant antibacterial agent, so that the antibacterial performance on microorganisms such as fungi is realized; the introduction of fluorine can effectively improve the hydrophobicity of a coating of the paint and reduce the influence of water vapor on antibacterial components in the coating, and the introduction of allyl can enable the corrosion-resistant antibacterial agent to react with butyl acrylate and other raw materials under the action of an initiator to achieve the cross-linking ability, so that the loss of the corrosion-resistant antibacterial agent is effectively avoided, and the service life of the coating is prolonged. The antibacterial activity is kept for a long time.

The invention provides a preparation method of a lithium manganese iron phosphate composite material containing an MXene coating layer, and the method comprises the following steps: uniformly dispersing manganese salt, ferric salt, phosphorus salt and lithium salt solutions and an antioxidant in a dispersing agent respectively, and mixing to obtain a mixed solution; carrying out ultrasonic treatment on the mixed solution in a protective atmosphere to obtain a lithium manganese iron phosphate dispersion liquid; carrying out solid-liquid separation on the lithium manganese iron phosphate dispersion liquid, washing with water, and drying in a drying oven at a set temperature; calcining the lithium manganese iron phosphate solid, and cooling to room temperature to obtain a lithium manganese iron phosphate body material; the preparation method comprises the following steps: preparing a dispersion liquid from a lithium manganese iron phosphate body material, uniformly mixing the dispersion liquid with an MXene dispersion liquid, coating the outer surface of the lithium manganese iron phosphate body material with MXene under ultrasonic waves, and then filtering and freeze-drying to obtain the lithium manganese iron phosphate composite material. According to the lithium manganese iron phosphate composite material prepared by the invention, the conductivity of the material is effectively improved, and meanwhile, dissolution of manganese ions in the material can also be inhibited.

The invention relates to the technical field of lithium ion batteries, and discloses lithium manganese iron phosphate and a preparation method thereof.The preparation method comprises the following steps that SP01, a lithium source, an iron source, a manganese source, a phosphorus source, a carbon source, a doping additive and water are mixed and ground into slurry; sP02, the slurry is subjected to screening and grading after being subjected to atomization drying; sP03, mixing the dried undersize material with a coating additive; sP04, putting the coated material into a kiln for sintering treatment; according to the method, fine powder does not exist in the obtained finished product lithium manganese iron phosphate, the graded material is coated and then sintered, and a double coating layer of a lithium ion conductor material and conductive carbon is formed on the surface of the lithium manganese iron phosphate material, so that the conductivity of the material can be improved; the direct contact between the material and electrolyte can be better protected, and the dissolution of manganese is avoided, so that the rate capability, the cycling stability and the safety of the material are improved.

The invention belongs to the technical field of lithium ion battery positive electrode materials, and provides a high-specific-energy lithium manganese iron phosphate positive electrode material and a preparation method thereof.The preparation method comprises the following steps that 1, carbon nanotubes are added into deionized water to be subjected to ultrasonic dispersion, modified xanthan gum, ammonia water and hydrazine hydrate are added to be stirred, the mixture is heated to continue to be stirred, suction filtration and washing are conducted, and carbon nanotubes are obtained; drying to obtain a carbon source; step 2, adding the lithium hydroxide solution into the phosphoric acid solution, stirring and dispersing, adjusting the pH value, adding the manganese sulfate solution and the ferrous sulfate solution, and carrying out hydrothermal synthesis reaction to obtain a hydrothermal reaction product; step 3, centrifuging, washing and drying the hydrothermal reaction product, and mixing the dried product with a carbon source to obtain a mixture; step 4, carrying out ball milling on the mixture to obtain powder; and step 5, calcining the powder, and cooling to obtain the product. The obtained lithium manganese iron phosphate positive electrode material has the advantages of uniform thickness of a carbon coating layer, excellent electrochemical performance, stable cycle performance and the like.

A film for manufacturing a flexographic printing plate, which comprises a base material and an ablation layer laminated on the base material, the ablation layer containing a resin having a structural unit (1) represented by general formula (1), and the thickness of the base material being 10 [mu] m or more and less than 100 [mu] m. (In formula (1), R1 and R2 each independently represent a non-polar group, and R3 and R4 each independently represent a hydrogen atom or a non-polar group. > # imgabs0 #

The invention relates to the technical field of new energy, and discloses a single-crystal positive electrode material which comprises a core layer and a first shell layer, the core layer is a ternary material core layer doped with a metal element A; the first shell layer is a fluoride coating layer; the metal element A is selected from at least one of zirconium, titanium, magnesium, aluminum, niobium and tungsten; the fluoride coating layer is obtained by doping villiaumite containing a metal element A into the core layer, sintering and migrating to the surface of the ternary material core layer; through the design, the cycling stability of the positive electrode material is improved from two aspects of improving the internal structure stability of the positive electrode material and consuming residual lithium on the surface, and meanwhile, due to doping of the metal element A and the villiaumite containing the metal element A, the metal element A is more uniformly distributed in the positive electrode material, so that the stability of the material is further improved; in addition, the invention also discloses a single-crystal positive electrode material.

The invention discloses a preparation method and application of a boron and fluorine co-doped potassium ion battery positive electrode material, the chemical formula of the boron and fluorine co-doped potassium ion battery positive electrode material is K < 0.5 > Mn < 0.73 > Ni < 0.22 > B < 0.05 > F < 0.05 > O < 1.95 >, bond energy of O-O and TM-O is changed through introduction of boron and fluorine, TM atom spacing is reduced, and interlayer spacing is increased, so that a wider ion transmission channel can be provided, and the service life of the battery is prolonged. And structural deformation is inhibited. In addition, introduction of boron and fluorine inhibits irreversible release of oxygen anions, and side reactions are reduced. The crystal structure of the manganese-based layered metal oxide positive electrode material is synergistically regulated by anions and cations, so that the prepared boron and fluorine co-doped potassium ion battery positive electrode material has good cycling stability and excellent rate capability.

The invention discloses a positive electrode active material, a secondary battery and a power utilization device, and belongs to the technical field of batteries, the positive electrode active material comprises a core material and a carbon coating layer arranged on the outer surface of the core material, the core material comprises a positive electrode material and boron oxide, the boron oxide is at least partially distributed among pores of the positive electrode material, and meanwhile, the positive electrode material contains the manganese-iron-lithium oxide with specific doping elements, so that the lithium ion secondary battery has stable electrochemical capability in a high-temperature and high-voltage state, and therefore, the cycling stability can be effectively improved, the internal resistance can be reduced, gas production can be inhibited, and the service life of the lithium ion secondary battery can be prolonged. The volume expansion rate is reduced.

The invention discloses a sodium-ion battery electrolyte as well as a preparation method and application thereof, and belongs to the technical field of battery electrolytes. According to the preparation method disclosed by the invention, the boric acid ester additive is added into the basic electrolyte, and the boric acid ester is preferentially decomposed in the battery circulation process, so that the generated boron-containing substance can inhibit the side reaction of the electrolyte and increase the stability of the electrolyte; the boric acid ester preferably participates in the formation of electrode / electrolyte interface layers on the two sides of the positive electrode and the negative electrode, and the boric acid ester assists in dissolving NaF with low ionic conductivity at the electrode / electrolyte interface and promotes dissociation of sodium salt in the electrolyte to increase free sodium ions, so that the diffusion rate of the sodium ions is improved, and the performance of the sodium-based half cell and the sodium-based total cell is improved; and the capacity retention ratio and the rate capability of the sodium-nickel iron sodium manganate battery at room temperature or low temperature can be improved.

The invention provides a positive plate, a battery and electric equipment, the positive plate comprises a positive active material, and the positive active material comprises lithium manganese iron phosphate particles; the molar ratio of a manganese element to an iron element in the positive electrode active material is a; the acidity growth rate of the positive plate is h; k is equal to b / L, L is the depth of XPS etching of the positive plate, the value is 10 nm, and k is the peak intensity ratio of a B1s peak at the position with binding energy of 188-192eV in an XPS graph during XPS etching analysis of the positive plate; b is the peak intensity of a B1s peak of which the binding energy is 188-192eV in an XPS diagram; a, k and h meet the following relational expression: a * h / k = 8 * 10 <-4 >-10. According to the positive plate, a stable CEI film containing B is formed on the surface of the positive plate by controlling the manganese-iron ratio, the acidity growth rate and the peak intensity ratio when the positive plate is etched for a certain depth, so that the dissolution of manganese ions is prevented, the consumption of active lithium is reduced, and the circulation is improved.

The invention belongs to the technical field of environmental pollution treatment, and particularly relates to a nitrogen-doped carbon nanotube confinement composite material as well as a preparation method and application thereof. Compared with the prior art, the preparation method has the advantages that the cheap nitrogen source and transition metal salt are used as raw materials, the nitrogen-doped carbon nanotube-coated iron carbide confinement material is creatively synthesized in one step by regulating and controlling the cracking temperature, the metal nanoparticles are effectively coated in the carbon nanotubes, and the preparation method is simple to operate and high in yield. The prepared material has the advantages of large specific surface area, rich catalytic active sites, efficient electron transfer capability, strong magnetism, convenience in recovery and the like, so that the nitrogen-doped carbon nanotube confinement composite material can effectively improve the electron transfer capability of the material, reduce the binding energy between the material and persulfate, and improve the catalytic activity of the material. A reaction system mainly activates persulfate through a free radical path to generate sulfate free radicals and hydroxyl free radicals with higher oxidation-reduction potential, so that perfluoro and polyfluoroalkyl substances are effectively degraded.

The invention discloses in-situ carbon-coated cobalt-doped lithium manganese iron phosphate and a preparation method thereof.The preparation method comprises the steps that a metal-organic framework precursor FexMn1-x-yCoy-MOF is prepared, x is larger than 0 and smaller than 1, y is larger than 0 and smaller than 0.01, then the metal-organic framework precursor is mixed with a lithium source and a phosphorus source, grinding treatment and spray drying are conducted, and the in-situ carbon-coated cobalt-doped lithium manganese iron phosphate is obtained. And calcining in an inert atmosphere to obtain the in-situ carbon-coated cobalt-doped lithium manganese iron phosphate. Uniform Co doping is formed in situ on a lithium manganese iron phosphate crystal lattice, the Co element can occupy the Fe site or Mn site in lithium manganese iron phosphate, the Co element can catalyze an organic ligand to form a high-conductivity carbon nanotube in situ in the sintering process, the high-conductivity carbon nanotube is interspersed on the surface of an in-situ carbon-coated lithium manganese iron phosphate particle, and the high-conductivity carbon nanotube and the in-situ carbon-coated lithium manganese iron phosphate particle have a synergistic effect; meanwhile, the conductivity, the stability and the compaction density of the material are improved.

The invention belongs to the technical field of battery negative electrode materials, and particularly relates to a phosphorus-based negative electrode material with a coating structure as well as a preparation method and application of the phosphorus-based negative electrode material. On the basis of the prior art, nano nickel phosphide, red phosphorus and carbon nanospheres are subjected to ball milling to prepare a main body phosphorus-based material, and then the main body phosphorus-based material is coated with a coating layer prepared from a nanofiber material, pyrrole and 5-azaindole, so that the coating layer of the phosphorus-based negative electrode material has elasticity, the volume expansion rate of the phosphorus negative electrode material is reduced, and the service life of the phosphorus negative electrode material is prolonged. According to the nickel phosphide-based negative electrode material and the preparation method thereof, the interface interaction between the phosphorus-based negative electrode material and the binder is enhanced, the prepared nickel phosphide grows on the black phosphorus nanosheet, so that the nickel phosphide has good dispersity, the nickel phosphide nanocrystals can be effectively prevented from being agglomerated, and the energy storage capacity of the nickel phosphide is improved; and after the 5-hydroxy vanillin is grafted, the adhesive has excellent wet adhesion resistance, and can prevent the dissolution of phosphorus element, so that the cycle efficiency of the electrode is improved.

The invention belongs to the field of batteries, and particularly relates to a lithium ion battery electrolyte and application thereof. The lithium ion battery electrolyte provided by the invention comprises the following components: an organic solvent, a lithium salt and an additive, the additive comprises a compound with a structure as shown in a formula I and / or a compound with a structure as shown in a formula II. The electrolyte provided by the invention can be used for optimizing SEI membrane components of the lithium ion battery, improving the cycle coulombic efficiency of the lithium ion battery, improving the high-voltage tolerance of an SEI membrane and improving the high-temperature and high-voltage cycle performance of the lithium ion battery. # imgabs0 #

The invention discloses rapid discharge equipment and method for waste lithium ion batteries, and belongs to the field of resource utilization of retired lithium ion batteries. According to the method, the mixed sulfate or chlorine salt solution is used as a discharge medium, the waste lithium ion battery is soaked in the discharge medium, discharge is achieved by means of electron directional movement formed by the external short circuit principle, thermal runaway of the battery cannot occur due to the fact that the battery is located in the discharge solution, the battery is not obviously corroded after being discharged, and electrolyte in the battery basically does not leak. Full-automatic equipment is adopted for safe and efficient discharging, waste water and waste gas generated in the discharging process are correspondingly treated, and waste water recycling is achieved. The equipment provided by the invention can effectively improve the discharge efficiency, reduce the metal loss of the battery, reduce the environmental pollution and guarantee the subsequent safe treatment of the waste lithium ion battery.

The invention belongs to the technical field of solid-state batteries, and particularly discloses solid-state electrolyte slurry and a preparation method thereof, a solid-state electrolyte and a solid-state battery. The preparation method of the solid electrolyte slurry comprises the following steps: dissolving a nickel salt, a cobalt salt, a manganese salt and a surfactant in a solvent to obtain a solution A; dissolving a ligand in a solvent to obtain a solution B; the solution A is added into the solution B for a reaction, and after the reaction is completed, a NiCoMn-MOF material is obtained; the NiCoMn-MOF material is subjected to heating, heat preservation and modification in an oxygen-containing atmosphere, and a modified NiCoMn-MOF material is obtained; and mixing the modified NiCoMn-MOF material, a lithium salt, a polymer and a solvent 1 to obtain the solid electrolyte slurry. The modified NiCoMn-MOF similar to a ternary material is added into the solid electrolyte slurry, so that the dissolution of transition metal of a positive electrode material can be inhibited.

The invention relates to a resource utilization method and device system for high-salinity organic wastewater, and the resource utilization method comprises the following steps: sequentially carrying out pH value adjustment and preheating on the high-salinity organic wastewater, and then carrying out wet catalytic oxidation reaction on the high-salinity organic wastewater and an oxidant under the action of a copper-based composite metal catalyst to obtain a vapor-liquid mixture; performing first gas-liquid separation on the gas-liquid mixture to obtain a first gas phase and a first liquid phase; the first gas phase is sequentially subjected to condensation and second gas-liquid separation, a second gas phase and a second liquid phase are obtained, and the second gas phase enters a turbine to do work; and sequentially carrying out cooling, ion exchange impurity removal and solid-liquid separation on the first liquid phase, carrying out alkali washing on the obtained filtrate to obtain purified saline water, and carrying out electrolysis on the purified saline water in an ion membrane electrolysis device. According to the method, the TOC concentration and the metal ion content of the high-salt organic wastewater can be effectively reduced, the treated water meets the water inlet requirement of the ion membrane electrolysis device, and resource utilization of the high-salt organic wastewater can be achieved.

The invention belongs to the field of intelligent aerogel, and discloses intelligent aerogel capable of being repeatedly used for indicating volatile biogenic amine and a preparation method of the intelligent aerogel. An anthocyanin natural extract is used as a specific color-sensitive responder of volatile biogenic amine, a naturally degradable cellulose material and a hydrophilic polymer are used as base materials of the intelligent aerogel, an edible plasticizer is used as a processing aid, and water is used as a solvent system of the material. And preparing the aerogel material for packaging the anthocyanin by adopting a directional freezing-vacuum freeze drying process. The intelligent aerogel prepared by the preparation method disclosed by the invention has the application advantages of being recyclable, high in indication (detection) sensitivity, low in detection limit, quick to use, high in use safety and capable of instantly identifying the existence and the concentration of the volatile biogenic amine by naked eyes.

The invention discloses a high-stability lithium ion battery electrolyte which comprises the following raw materials: LiPF6, ethylene carbonate, dimethyl carbonate and an additive. Compared with the traditional electrolyte, the electrolyte prepared by the method provided by the invention has good stability, and can maintain a high battery capacity retention rate after 100 cycles, thereby improving the use performance and durability of the battery.

The invention relates to the technical field of batteries, in particular to a positive plate and a battery comprising the positive plate. The positive plate comprises a positive current collector and a positive active material layer, the positive active material layer comprises a ternary material and a conductive binder, the conductive binder comprises a carbon nanotube and a bonding layer, the bonding layer comprises a bonding group and a complexing group, the bonding group comprises one or more of carboxyl, hydroxyl, amido and silyl, the complexing group comprises cyano, and the bonding group comprises one or more of carboxyl, hydroxyl, amido and silyl. The weight ratio of the bonding groups to the complexing groups is (5-8): 1, and the length-diameter ratio of the carbon nanotubes is 50-10000; the ternary material comprises first particles and second particles, the weight content of the element W in the first particles is 500 ppm to 3500 ppm, and the weight content of the element Y in the second particles is 200 ppm to 2000 ppm. The ternary material disclosed by the invention is relatively high in cycling stability, the bonding cohesion in the positive electrode active material layer is relatively high, and the cycling stability and the rate capability of the battery are relatively high.

Embodiments of the present application provide a positive electrode active material having the following chemical formula: LiaNixMnyObAzTr wherein 0.95 < = a < = 1.05, 0.45 < = x < = 0.55, 1.45 < = y < = 1.55, 3.5 < = b < = 4.05, 0.0005 < = z < = 0.5, and wherein A is one or more of Al, F and W, T is a metal doping element, and 0 < = rlt; and 0.1. By introducing the A element for doping, the dissolution of the Mn element in the positive electrode active material is inhibited, the stability of the positive electrode active material is improved, and the cycling stability of the secondary battery is improved.

The invention provides a high-compaction coated modified lithium manganese iron phosphate positive electrode material as well as a preparation method and application thereof, and relates to the field of lithium ion battery materials. The positive electrode material is prepared by the following steps: mixing a phosphorus source, an iron source, a manganese source, a magnesium source, a titanium source, a cobalt source, a lithium source, a carbon source and a dispersing agent, grinding, performing spray drying, and performing primary sintering to prepare a lithium manganese iron phosphate semi-finished product; the preparation method comprises the following steps: uniformly mixing a lithium manganese iron phosphate semi-finished product with tungsten boride, carrying out three-stage grinding including coarse grinding, coarse and fine grinding and fine grinding, carrying out batch mixing on the ground reduced slurry according to different volume ratios to improve the compaction density of the material, uniformly mixing the slurry, carrying out spray drying, and carrying out high-temperature sintering to obtain the lithium manganese iron phosphate composite material. And carrying out airflow crushing and sieving to obtain the high-compaction coated and modified lithium manganese iron phosphate positive electrode material. After tungsten boride and lithium manganese iron phosphate are coated, chemical acting force is formed on the surface, the polarization phenomenon is remarkably weakened, and the positive electrode material shows good long-term cycle stability.

The invention belongs to the field of batteries, and particularly relates to an electrolyte and a semi-solid battery. The electrolyte comprises a lithium salt, a solvent and an additive, the additive comprises a solvent additive; the solvent additive comprises a low HOMO energy level solvent; preferably, the solvent with the low HOMO energy level is 2, 2, 2-trifluoroethanol (TFEA), and the solvent with the low HOMO energy level is 2, 2, 2-trifluoroethanol (TFEA). According to the electrolyte disclosed by the invention, by adopting the solvent additive with low HOMO energy level, the stability of the battery under high voltage can be effectively improved, an electrolyte-electrode interface is protected, the dissolution of transition metal is inhibited, electrolyte side reaction caused by moisture, free acid and transition metal is reduced, and the performance of the battery in a high-temperature storage test is improved; meanwhile, the cycle life and the rate capability of the battery are improved.

The invention provides an electrolyte and a lithium ion battery. The electrolyte comprises an organic solvent, a lithium salt auxiliary agent, LiPF6 and an additive, the additive comprises a crown ether compound, the crown ether compound comprises structures shown as a formula I and a formula II, # imgabs0 #, L1, L2, L3 and L4 are respectively and independently selected from any one of a single bond, C1-C4 alkylene and phenylene; r1, R2, R3 and R4 are independently selected from hydrogen, vinyl, amino, cyano, C1-C4 alkyl, five-membered heterocyclic group, phosphate group and-C (O) R, and R is selected from any one of hydrogen, hydroxyl and C1-C4 alkyl. By introducing the crown ether compound, the stability and cycle performance of the lithium ion battery under the conditions of high temperature and fast charge can be improved, and meanwhile, the gas production rate in the battery can be reduced, so that the safety performance of the lithium ion battery is improved.

The invention provides a positive electrode film-forming additive as well as a preparation method and application thereof. The positive electrode film-forming additive is an alkylamide alkoxysilane having a specific structure. Nitrogen atoms containing lone electron pairs in the amide structure are easy to lose electrons, so that relatively low oxidation potential is shown, and a CEI film can be preferentially formed on the surface of the high-nickel ternary positive electrode; the high bond energy characteristic of the Si-O bond and the flexible characteristic of the chain alkyl (CH2) n enable the formed CEI film to be more flexible and stable, and the SEI film to be more flexible and elastic at a high temperature and to be better in stability. When the alkylamide alkoxy silane is used as a positive electrode film-forming additive, the side reaction between a positive electrode interface and an electrolyte can be effectively inhibited, the structural stability of a positive electrode is improved, and the high-temperature cycling stability and safety of a battery are remarkably improved.

The invention discloses an electrolyte, a battery and electric equipment, the electrolyte comprises a first additive, a lithium salt and a solvent, and the first additive comprises at least one of thioimidazolidinone compounds containing carbon-carbon double bonds. The electrolyte comprises the first additive, and the first additive has multifunctional effects of positive and negative electrode film forming and transition metal ion complexing, so that an interfacial film formed by a positive electrode and a negative electrode has excellent ion conductivity and film forming stability, and DCR increase in the charging and discharging process can be effectively inhibited; meanwhile, dissolution and deposition of transition metal ions in the positive electrode material at high temperature / high pressure can be effectively inhibited, so that the high-temperature cycle performance and the storage performance of the battery are improved.

The invention provides a composite positive pole piece and a preparation method and application thereof.The composite positive pole piece comprises a positive current collector, a first active substance layer and a second active substance layer, the first active substance layer and the second active substance layer are sequentially arranged on the surface of at least one side of the positive current collector in a stacked mode, and the first active substance layer comprises lithium manganese iron phosphate and nickel cobalt lithium manganate; according to the lithium-rich manganese-based lithium ion battery disclosed by the invention, the double active material layers are adopted, the types of the active materials in the active material layers are reasonably matched, the advantages of various materials are coordinated, and the cycle performance of the pole piece is improved.

The invention discloses a calcium-iron-magnesium composite catalyst, a preparation method thereof and application of the calcium-iron-magnesium composite catalyst in catalyzing pypocholoride to oxidize and degrade organic / inorganic wastewater. The preparation method comprises the following steps: dissolving calcium salt, magnesium salt and ferric salt in water, then adding a strong alkali solution to carry out hydrolysis coprecipitation reaction, and sequentially carrying out centrifugal separation, washing, drying and grinding on the obtained precipitation product to obtain the calcium-iron-magnesium composite catalyst. The catalyst has good chemical stability and high catalytic activity, avoids the use of harmful transition metals or noble metals, is used for catalyzing pypocholoride to degrade organic or inorganic pollutants in organic / inorganic wastewater, and shows the characteristics of high oxidative degradation rate, thorough oxidative degradation, high pypocholoride utilization rate and the like; the invention aims to solve the problem that the catalytic oxidation effect is poor when the existing pypocholoride is applied to removal of organic or inorganic pollutants which are difficult to oxidize and degrade.

The invention relates to the technical field of building materials, in particular to a high-adaptability sludge curing agent and application thereof.Through the synergistic effect of glass powder, latex powder, super absorbent resin and graded aggregate, all unit phase interfaces of sludge particles can be firmly combined and can react with active substances in the sludge particles to generate expanded gelling substances, and the curing effect of the sludge particles is improved; through chemical excitation, combination and physical combination can be generated to improve the plasticity of a blank, the strength of a semi-finished green brick and the compressive strength of a product, the use performance of the product can be met, meanwhile, heavy metal and organic matter can be removed, harmful substances are prevented from being dissolved out, the raw materials are wide in source, the production process is simple, and the production cost is low. The unfired water permeable brick meeting the market requirement is produced by utilizing the desilted sludge on the premise of low energy consumption and no environmental pollution, so that the dual purposes of dredging the river channel, beautifying the water area environment and turning waste into wealth are achieved, and the unfired water permeable brick can be widely popularized and used.

The invention provides flame-retardant tread rubber as well as a preparation method and application thereof. The flame-retardant tread rubber is prepared from the following raw materials in parts by weight: 100 parts of matrix rubber, 24-35 parts of a composite flame retardant, 40-100 parts of filler, 1-4 parts of a silane coupling agent, 2-6 parts of an anti-aging agent, 1-3 parts of sulfur, 1-3 parts of an accelerant, 1-3 parts of stearic acid and 3-5 parts of zinc oxide, the composite flame retardant comprises a halogen flame retardant and an inorganic flame retardant, the inorganic flame retardant comprises an inorganic coating flame retardant, and the inorganic coating flame retardant comprises an antimony trioxide core and a molybdenum disulfide coating layer coating the surface of the antimony trioxide core. In the flame-retardant tread rubber disclosed by the invention, a molybdenum disulfide coating layer in the inorganic coating flame retardant can improve the stability of antimony trioxide at a high temperature, and can enhance the interfacial compatibility with a non-polar rubber matrix at the same time, and the synergistic reaction with the halogen flame retardant further improves the flame-retardant effect; therefore, the flame retardancy of the rubber is improved, and excellent mechanical properties are kept at the same time.