624 results about "Nano carbon" patented technology

The invention discloses a preparation process of an aluminum oxide ceramic material, which comprises the following steps: S1, pretreatment of aluminum oxide powder: taking alpha-Al2O3 powder as a raw material, adding a dispersion medium, carrying out ball milling, transferring into an ultrasonic dispersion machine, dispersing, and further carrying out vacuum drying to obtain pretreated aluminum oxide powder; s2, chemical activation treatment: weighing pretreated aluminum oxide, magnesium oxide, nano silicon dioxide, calcium oxide, zirconium dioxide, titanium dioxide and modified nano silicon carbide in parts by weight, mixing, sequentially adding a dispersing agent absolute ethyl alcohol and a KH550 silane coupling agent, stirring at a high speed, adding a polyvinyl alcohol binder, and continuously stirring to obtain ceramic slurry; s3, sieving the ceramic slurry, filling the ceramic slurry into a mold, and performing isostatic pressing to obtain a ceramic green body; and S4, putting the ceramic green body into a box-type sintering furnace, sintering step by step, and cooling to room temperature along with the furnace to obtain the aluminum oxide ceramic material. The prepared aluminum oxide ceramic material has high compactness, excellent dielectric strength and mechanical property, low energy consumption and great application potential.

The invention provides weather-resistant anti-freezing road concrete and a preparation method thereof, and belongs to the technical field of concrete. The concrete comprises the following components: sulphoaluminate cement, Portland cement, silica fume, fly ash, modified granite gravel coarse aggregate, medium sand fine aggregate, silica fume blended fiber, silica fume blended polyacrylonitrile fiber, a composite air entraining agent, a functional modifier, a composite antifreeze agent, pre-absorbent zeolite powder and the like. The preparation method comprises the following steps: modifying granite macadam with Al (H2PO4) 3, SiO2 and methoxypolyethylene glycol triethoxysilane, and modifying with a lithium silicate aqueous solution to obtain the modified granite macadam coarse aggregate. The composite air entraining agent comprises a JRY-Q air entraining agent and sodium alpha-olefin sulfonate. The functional modifier is prepared from gas phase method spherical nano silicon dioxide and nano alpha-Al2O3. The composite antifreeze agent comprises ethylene glycol butyl ether acetate and modified calcium carbonate. The modified calcium carbonate is obtained by sequentially modifying nano calcium carbonate with calcium chloride, a KH-550 silane coupling agent and stearic acid.

The invention discloses a nickel-based alloy composite plate and a preparation method thereof, and belongs to the technical field of nickel-based alloys, the nickel-based alloy composite plate comprises a stainless steel bottom plate and a nickel-based alloy plate, and the nickel-based alloy plate comprises, by weight, 52-58 parts of nickel powder, 17-21 parts of molybdenum powder, 8-12 parts of copper powder, 7-9 parts of boron powder, 2-3 parts of modified hafnium carbide powder, 4-7 parts of an alloy reinforcing agent and 2-3 parts of a fluxing agent. The modified hafnium carbide prepared from hafnium oxide and nano carbon powder successfully replaces metal hafnium with high cost in the traditional process; and meanwhile, the actual adding proportion of the modified hafnium carbide in the nickel-based alloy plate is greatly reduced, the cost of industrial mass production is doubly reduced from the two aspects of raw material selection and dosage control, and the economic requirement of large-scale production is better met.

The invention discloses silencing and mildew-proof organic silica gel as well as a preparation method and application thereof, and belongs to the technical field of organic silicon binding material polymers. Comprising the following components in parts by weight: 35-45 parts of nano calcium carbonate, 32-40 parts of hydroxyl-terminated polysiloxane, 5-9 parts of silencing powder, 0.5-2.5 parts of glass fiber powder, 5-9 parts of a hyperbranched polymer, 2-5 parts of a hydrophobic surface modifier, 1.5-3 parts of color paste, 1-2 parts of a water-based coupling agent, 1-2 parts of a cross-linking agent, 0.5-2.5 parts of a mildew preventive, 0.4-2 parts of a composite titanide and 0.4-0.7 part of nano silver powder. According to the invention, the nano silver powder and the mildew preventive are compounded, and an inorganic sterilization system is combined, so that broad-spectrum environment-friendly bacteriostasis is realized, and high-humidity long-acting protection is met; the powder is subjected to hydrophobic treatment, moisture is blocked, and high adhesion is kept; silencing powder serves as a core, a sound absorption network is cooperatively formed, the noise reduction capacity is improved, and the device is suitable for multiple scenes.

The invention discloses a preparation method of a high-conductivity and low-thermal-conductivity carbon-carbon composite material electrode, and relates to the technical field of electrode preparation, the preparation method comprises the following steps: mixing nano carbon spheres, an organic binder and a solvent to obtain a mixed slurry, respectively coating the mixed slurry on a PAN-based carbon fiber web and pitch-based carbon fiber non-woven cloth, and drying to obtain the high-conductivity and low-thermal-conductivity carbon-carbon composite material electrode. Then preparing a preform by alternately laying and needling the PAN-based carbon fiber web coated with the mixed slurry and pitch-based carbon fiber non-woven cloth, pretreating the preform by adopting a chemical vapor deposition technology to obtain an intermediate I, and treating the intermediate I in a pressure impregnation tank and a carbonization and graphitization furnace to obtain an intermediate II; and carrying out pressure impregnation-carbonization treatment on the intermediate II to obtain the carbon / carbon composite material. According to the preparation method of the high-conductivity and low-heat-conductivity carbon-carbon composite material electrode, the material has high conductivity and low heat conductivity, a carrier is provided for precise heat management under specific conditions in a high-temperature furnace, and the energy consumption of equipment is reduced.

The invention discloses a silane self-crosslinking polyethylene overhead insulation material for a cable and a preparation method. The insulating material comprises a polyethylene base material, a silane coupling agent, a catalyst, an antioxidant, a nanoscale reinforcing filler, a core-shell structure filler and nano montmorillonite. The polyethylene base material is a blend of polyethylene with different densities and can give consideration to rigidity and toughness; the nanoscale reinforcing filler is nano calcium carbonate modified by silane; the core-shell structure filler takes nano calcium carbonate as a core and an ethylene-octylene copolymer as a shell, so that the processing fluidity can be improved, and the filler agglomeration can be avoided; the nano montmorillonite can improve the aging resistance and the electrical insulation strength. The preparation method comprises the steps of nano filler pretreatment, nano montmorillonite modification, polyethylene base material blending, component mixing, crosslinking and post-treatment, through the pretreatment, modification, optimized mixing and crosslinking processes, it is ensured that all components are evenly dispersed, compatibility is improved, and the processing performance, the mechanical performance and the electrical performance of a finished product are balanced.

The invention discloses a high-whiteness EVA chemical foaming sole material and a preparation method thereof, and belongs to the technical field of footwear products. The EVA chemical foaming sole material is formed by chemical foaming of an EVA composite raw material. The EVA composite raw materials mainly comprise 50 to 70 parts of EVA, 20 to 40 parts of an olefin thermoplastic elastomer, 0.4 to 0.7 part of a peroxide cross-linking agent, 2 to 4 parts of an AC foaming agent, 1 to 2 parts of zinc oxide, 0.3 to 0.8 part of 6-hydroxy-1, 2, 3, 4-tetrahydroquinoline, 0.5 to 1 part of nano zinc carbonate and 0.5 to 1 part of pentaerythritol tetrastearate. The whitening effect of the sole material can be realized on the premise of protecting the EVA foaming-crosslinking structure; therefore, the attractiveness of the product is improved, the durability is better, the mechanical properties and other properties of the EVA foamed sole are not influenced, and the high-quality requirements of elasticity, pressure resistance, comfort and the like of sports shoes can be met.

The invention relates to a sealing rubber ring, and belongs to the technical field of sealing materials. The problems that a traditional sealing rubber ring is narrow in temperature resistance range, poor in medium corrosion resistance, unbalanced in mechanics and elasticity, short in anti-aging service life and prone to precipitation and pollution are solved. The material is composed of a base material, a composite anti-precipitation filler and auxiliary components, the base material contains four components including modified fluororubber and the like, the composite anti-precipitation filler contains modified nano calcium carbonate and the like, and the auxiliary components contain vulcanizing systems, reinforcing systems and the like. The modified fluororubber is prepared by a specific process. The preparation method comprises the following steps: banburying, standing, vulcanizing, cooling and removing flash. The rubber ring has the advantages of wide temperature-resistant range, medium corrosion resistance, aging resistance, balanced mechanical properties and no precipitation pollution, and is suitable for industrial scenes with extreme temperature difference, strong corrosion and the like.

The present application provides a solid-state hydrogen storage material and a preparation method and application thereof. Specifically, the preparation method comprises the following steps: (1) ball-milling a magnesium-based alloy powder, a light metal hydride, a nano-carbon material, a composite catalyst powder and an interface modifier to obtain a mixed powder; and (2) sintering the mixed powder under vacuum at 200-350 DEG C for 2-5 hours to obtain a sintered body, wherein: the magnesium-based alloy powder is a Mg-Mn-Al alloy powder; the light metal hydride is a mixture of LiAlH4 and NaBH4; the nano-carbon material is selected from one or more of graphene and carbon nanotubes; the composite catalyst powder is a mixture of TiO2, Fe3O4, CeO2 and La2O3; and the interface modifier is selected from one or more of a silane coupling agent and a titanate coupling agent. The solid-state hydrogen storage material has high hydrogen storage capacity, fast hydrogen absorption and desorption rate and good cycle stability.

This invention provides a method for preparing monodisperse nano-calcium carbonate from calcium-containing industrial solid waste. The method comprises the following steps: S1: mixing calcium-containing solid waste and an ammonium salt solution, reacting the mixture, and filtering to obtain a calcium-containing filtrate; S2: mixing the calcium-containing filtrate, CO2 gas, and a crystal form control agent, reacting the mixture, and filtering to obtain nano-calcium carbonate; S3: mixing the nano-calcium carbonate with an aqueous solution containing a surfactant, reacting the mixture, centrifuging, washing, and drying to obtain monodisperse nano-calcium carbonate. This method improves the calcium leaching rate from calcium-containing solid waste, achieves explosive nucleation and rapid growth of calcium carbonate, enhances the reactivity and reaction time between the surfactant and the nano-calcium carbonate particles, and improves the dispersion and surface modification degree of the calcium carbonate nanoparticles.

The invention provides a method for synthesizing high-valued amorphous calcium carbonate through carbon sequestration of carbide slag, and belongs to the technical field of carbon sequestration and high-valued utilization of industrial solid waste resources. The method comprises the following steps: carrying out active calcium extraction reaction on a dried and ball-milled carbide slag aqueous solution through ammonium chloride, stirring and filtering to obtain a calcium-containing solution; the method comprises the following steps: adding a certain amount of absolute ethyl alcohol and magnesium chloride into a calcium-containing solution, fully stirring, adjusting the pH value to a certain value, and introducing CO2 gas for mineralization reaction to obtain a turbid liquid containing calcium carbonate precipitate; and carrying out centrifugal separation, alcohol washing and drying on the turbid liquid to obtain powder calcium carbonate. According to the method disclosed by the invention, the calcium carbide slag active calcium liquid is extracted by adopting ammonium chloride, and absolute ethyl alcohol-magnesium chloride is added to precisely regulate and control the reaction steps of CO2 and the extracted calcium liquid, so that the CO2 is efficiently fixed, and meanwhile, mineralization is performed to obtain a mixed crystal type amorphous nano calcium carbonate product. According to the technology, double targets of synthesizing high-valued calcium carbonate through carbide slag carbon sequestration are achieved, and an innovative technical path is invented for current solid waste resource utilization.

The invention discloses an anti-aging and low-temperature-resistant PVC (polyvinyl chloride) foaming material with flexibility and strength and a preparation method of the anti-aging and low-temperature-resistant PVC foaming material. Comprising the following components: 60-80 parts of polyvinyl chloride resin, 10-20 parts of chlorinated polyethylene (CPE), 5-15 parts of ethylene-vinyl acetate copolymer (EVA), 20-35 parts of a composite plasticizer, 5-12 parts of nano calcium carbonate, 3-8 parts of modified montmorillonite, 6-12 parts of a composite stabilizer, 3-7 parts of a foaming agent, 1-3 parts of a cross-linking agent, 1-3 parts of an antioxidant, 0.5-2 parts of an ultraviolet light absorber, 5-10 parts of a cold-resistant plasticizer and 1-3 parts of a lubricant. According to the invention, the raw material components and the ratio are reasonably selected, so that the prepared PVC foaming material has good flexibility and strength. The addition of chlorinated polyethylene and ethylene-vinyl acetate copolymer can improve the flexibility of the material, the addition of nano calcium carbonate and modified montmorillonite enhances the strength of the material, and the use of the composite plasticizer also plays a positive role in the balance of flexibility and strength.

The application discloses a kind of high-performance coiled material powder coating and preparation method thereof, belong to powder coating technical field, the application is by the compounding of organosilicon modified epoxy resin and carboxyl-terminated polyester resin, after organosilicon modification, the segment of introduction-Si-O-Si in system has high flexibility, and synergistic effect with nano calcium carbonate, it is helpful to balance the adhesion and flexibility of coating, grafting modification graphene oxide, active chromium oxide is added again, can obviously improve the mechanical strength of coating;After then, phosphite group is grafted onto graphene oxide, and is applied in the present powder coating system, can form three-dimensional network structure in system, chemical bond effect, not only can improve its crosslinking stability in system, and the sheet structure of graphene oxide, also can play certain barrier property, can also give coating longer weather resistance, and active chromium oxide synergistic effect is further improved, and the weather resistance and corrosion resistance of coating.

The invention relates to a starch pore-enlarging type high-chlorine-capacity long-acting high-temperature dechlorinating agent and a preparation method thereof, and belongs to the technical field of dechlorinating, the starch pore-enlarging type high-chlorine-capacity long-acting high-temperature dechlorinating agent comprises the following raw materials: complexing coating calcium hydroxide, modified hydroxyapatite, a composite inorganic adhesive, reinforcing and toughening whiskers, a composite pore-forming agent, a composite synergist, nano calcium carbonate and water; according to the starch reaming type high-chlorine-capacity long-acting high-temperature dechlorinating agent obtained by the invention, the breakthrough chlorine capacity is 40.9 to 44.9 percent, the crushing strength is 139 to 151N. Cm <-1 >, and the abrasion rate is 0.8 to 1.5 percent.

The invention discloses an alkali-reducing protective agent for a reinforced cement-based cementing material for basalt fibers and application of the alkali-reducing protective agent, and belongs to the technical field of building materials. The alkali-reducing protective agent is prepared from the following raw materials in percentage by weight: 20 to 40 weight percent of active silicon dioxide aerogel, 15 to 30 weight percent of metakaolin, 10 to 25 weight percent of lithium slag powder, 5 to 15 weight percent of nano calcium carbonate, 3 to 8 weight percent of redispersible latex powder, 1 to 5 weight percent of water reducing agent and 0.5 to 2 weight percent of retarder. The invention also discloses an application of the alkali-reducing protective agent in a cement cementing material. According to the invention, the alkalinity of a set cement hole solution around the basalt fiber can be efficiently and enduringly reduced, physical and chemical dual protection barriers are formed on the surface of the basalt fiber, the alkali corrosion of the fiber is obviously delayed, and the long-term durability and enhancement efficiency of the basalt fiber are greatly improved.

The invention discloses a natural gas hydrate generation accelerant containing amino acid and nano calcium carbonate as well as a preparation method and application of the natural gas hydrate generation accelerant, and belongs to the technical field of natural gas hydrates. The problems of low natural gas hydrate forming rate, low gas storage density, low natural gas recovery efficiency, poor environmental protection property and the like in the prior art are solved. The accelerant is obtained by taking a hydrophobic amino acid solution as a base solution, adding nano calcium carbonate into the base solution and adjusting or not adjusting the pH value. By regulating and controlling the type and the concentration of a base solution in the accelerant, the hydrate formation rate and the gas storage density are improved, and the induction time of hydrate generation is shortened; nanoparticles in the accelerant are small in particle size and large in specific surface area, so that disturbance and convective heat transfer of the accelerant are enhanced; in addition, the chemical components of the nanoparticles in the accelerant and the main component of the seabed sediment with a large amount of natural gas hydrate in the nature are calcium carbonate, the environmental risk is reduced, and the calcium carbonate and hydrophobic amino acid are wide in source and environmentally friendly.

The invention relates to the technical field of ink, in particular to high-stability digital discharge printing ink-jet ink and a preparation process thereof. The high-stability digital discharge printing ink-jet ink is prepared from the following raw materials in parts by weight: 60-80 parts of a solvent, 10-20 parts of a discharge agent, 2-4 parts of filler, 1-3 parts of a humectant and 0.4-1 part of an active agent. According to the invention, sodium alginate is used as natural anionic polysaccharide, nano calcium carbonate in the filler can be wrapped through hydrogen bonds and electrostatic interaction by using hydroxyl and carboxyl contained in a molecular chain of sodium alginate to form composite structure microspheres, and Span 80 and paraffin can further modify the surface morphology of the microspheres by using hydrophobic interaction of Span 80 and paraffin; after the ink is dried, the composite structure microspheres can be combined with ink components, a continuous film is formed on the surface of a fabric, nano calcium carbonate and adsorbed pigment molecules are fixed, damage of external factors to pigments is isolated, the coloring life is prolonged, and therefore the stability of the digital discharge printing ink-jet ink is improved.

The invention discloses a preparation method of a wood water collecting material for extracting water from air. The method comprises the steps that natural wood is pretreated, a photo-thermal material-nano carbon black is added, the material is endowed with photo-thermal conversion performance, then moisture absorption salt is added, a product is subjected to freeze drying after loading is finished, and the high-moisture-absorption wood is obtained. The method has the advantages of simple process flow, mild reaction conditions, short reaction time, excellent moisture absorption and photo-thermal conversion performance, and good practical application value.

The invention discloses dynamic reversible hydrogen bond regulation type nano calcium carbonate as well as a preparation method and application thereof. The preparation method comprises the following steps: preparation of nano calcium carbonate slurry: treating limestone to obtain the nano calcium carbonate slurry; synthesizing a dynamic hydrogen bond modifier: mixing hexamethylene diisocyanate and diethanol amine, adding a catalyst, and reacting to obtain a ureido-containing prepolymer; adding glycerol and monobutyl phosphate into the prepolymer for further reaction to obtain an intermediate; mixing the intermediate with polyethylene glycol, and reacting to obtain a dynamic hydrogen bond modifier; and preparing a nano calcium carbonate product: adding a dynamic hydrogen bond modifier into the nano calcium carbonate slurry, stirring for reaction, and then carrying out filter pressing dehydration, drying and crushing to obtain the nano calcium carbonate product. After the prepared nano calcium carbonate product is applied to the automobile primer, synergistic balance of high yield value and low Bingham viscosity of the automobile primer is realized, and performance improvement and constructability are well coordinated.

The invention discloses low-reflectivity spray matting paint as well as a preparation device and a use method thereof, and relates to the technical field of matting paint preparation. The invention relates to a water-based paint which comprises the following components: 30-50% of modified polyurethane acrylate, 5-15% of porous silicon dioxide, 0.1-0.5% of nano carbon black, 1-3% of fluorine modified wax powder and 31.5-63.9% of a quick-drying mixed solvent. The delustering paint has the advantages that pore filling and light absorption are synergistically realized through the composite delustering agent, the reflectivity is relatively low, the hydrophobicity, the adhesive force and the wear resistance are excellent, the construction is simple and convenient, and the preparation device has the advantages of dispersion stage, parameter integration, quantitative index construction, real-time monitoring, closed-loop control and grinding stage. A pore retention rate and energy density gradient collaborative optimization and reflectivity prediction stage is introduced, real-time prediction correction and control of a whole-process model are achieved, the problems of decentralized monitoring, fineness pore contradiction and parameter performance disjunction are solved, and the process efficiency and stability are improved.

The invention discloses a high-abrasion-resistance concrete additive as well as a preparation method and application thereof, and belongs to the technical field of concrete additives. The invention discloses a concrete additive with high abrasion resistance. The concrete additive is prepared from the following raw materials in percentage by mass: 30-40% of silica fume, 15-20% of mineral powder, 8-12% of nano silicon carbide, 2-8% of zirconium oxide microspheres, 10-15% of a polycarboxylic acid water reducer, 3-5% of an organic silicon water repellent, 2-5% of nano titanium dioxide and 5-10% of a modified bamboo-based material. The anti-abrasion additive prepared by the invention can ensure that the permeability coefficient is greater than or equal to 0.5 mm / s while ensuring the high anti-abrasion performance of concrete, is suitable for engineering scenes such as permeable pavements and the like with strict requirements on water permeability, and realizes the synergistic improvement of high water permeability (greater than or equal to 0.5 mm / s) and ultrahigh anti-abrasion performance (the strength ratio is greater than or equal to 140%) of the concrete; the problem that the water permeability and the abrasion resistance of traditional concrete cannot be synchronously improved at the same time is successfully solved.

The embodiment of the invention provides a composite negative electrode material and a preparation method and application thereof. The composite negative electrode material comprises a porous carbon matrix doped with an N element and / or a P element, a silicon-carbon composite material is deposited in pores of the porous carbon matrix, the silicon-carbon composite material comprises nano carbon and a plurality of amorphous nano silicon particles distributed in the nano carbon at intervals, and the nano carbon is a partially graphitized carbon material. In the silicon-carbon composite material deposited in the pores of the porous carbon matrix, silicon material particles are distributed in the partially graphitized nanocarbon material at intervals, so that the silicon material is amorphous and has a small size, the volume expansion effect is small, and the electron and ion transmission performance is improved due to the existence of the partially graphitized nanocarbon material; therefore, the composite negative electrode material has good cycling stability and rate capability.

The invention provides a hydrogel-based radiation refrigeration moisture power generation material and a preparation method and application thereof, and belongs to the technical field of moisture power generation materials.The hydrogel-based radiation refrigeration moisture power generation material comprises a nano carbon black layer, a conductive hydrogel layer and a titanium dioxide layer which are sequentially stacked; the conductive hydrogel layer comprises a hydrogel matrix, a conductive filler and a temperature-sensitive material; the temperature-sensitive material comprises at least one of poly (N-isopropylacrylamide), a polyethylene glycol and polylactic acid copolymer and vanadium oxide; the cross section of the hydrogel-based radiation refrigeration moisture power generation material is of a W-shaped structure. The conductive hydrogel layer is of a three-dimensional network structure with conductivity and temperature-sensitive characteristics; the titanium dioxide layer realizes efficient sunlight reflection, the nano carbon black layer enhances heat conduction and conductivity, and the W-shaped structure promotes moisture flow and circulation; the multifunctional power generation device prepared based on the hydrogel-based radiation refrigeration moisture power generation material has good radiation refrigeration and moisture power generation performance, and is excellent in stability and durability.

The corundum-silicon carbide-mullite castable is prepared from sintered mullite particles, silicon carbide fine powder, activated aluminum oxide micro powder, silicon dioxide micro powder, composite rare earth oxide fine powder, aluminum titanate fine powder, a binding agent, a water reducing agent, explosion-proof fibers and porous composite corundum-silicon carbide particles. The porous composite corundum-silicon carbide particles are formed by sintering fused corundum particles and nano silicon carbide powder through in-situ reaction, micron-sized pore channels which are communicated with one another are formed in the porous composite corundum-silicon carbide particles, and the surfaces of the particles are coated with a compact mullite-corundum complex phase layer, so that thermal stress can be effectively buffered, and permeation of zinc and alkali vapor can be blocked; the low thermal expansion characteristic of aluminum titanate and the grain boundary purification effect of rare earth oxide are matched, thermal shock resistance and erosion resistance are synergistically improved, and excellent thermal shock resistance, chemical erosion resistance, high strength and wear resistance are shown under the harsh working condition of the zinc oxide rotary kiln.

The invention discloses a flame-retardant impact-resistant MPP electric power tube and a preparation method thereof, belongs to the technical field of MPP electric power tube preparation, and aims to solve the technical problem that the flame retardance, impact resistance and mechanical strength of an MPP electric power tube in the prior art are further improved. The composite material specifically comprises the following components in parts by weight: 60-65 parts of modified polypropylene, 20-25 parts of a flame retardant, 3-5 parts of silicon dioxide coated aluminum oxide, 4-6 parts of modified nano calcium carbonate and 2-3 parts of an auxiliary additive. According to the flame-retardant and impact-resistant MPP electric power tube, the flame-retardant property, the impact resistance and the mechanical strength of the prepared flame-retardant and impact-resistant MPP electric power tube are further improved through the modified polypropylene, the flame retardant, the silicon dioxide coated aluminum oxide and the modified nano calcium carbonate.

The invention relates to the technical field of high polymer materials, and particularly discloses high-weather-resistance chlorinated polyethylene and a preparation method thereof. The high-weather-resistance chlorinated polyethylene is prepared from the following raw materials in parts by weight: 110 to 150 parts of chlorinated polyethylene, 9 to 15 parts of chloroprene rubber coated nano titanium dioxide, 38 to 60 parts of ionic liquid modified nano calcium carbonate, 5 to 10 parts of polyvinylidene fluoride resin, 10 to 20 parts of chlorinated paraffin and 1 to 6 parts of antioxidant, the preparation method comprises the following steps: S1, preparing chloroprene rubber coated nano titanium dioxide; s2, preparing ionic liquid modified nano calcium carbonate; s3, internal mixing; and S4, carrying out screw extrusion and press polish. The high-weather-resistance chlorinated polyethylene can be used for building waterproof coiled materials, outdoor protective coatings, automobile sealing strips, wire and cable sheaths and the like, and has the advantages of high tensile strength, elongation at break, impact toughness, ultraviolet aging resistance and thermo-oxidative degradation resistance.

The invention relates to the technical field of hydraulic concrete materials, in particular to a hydraulic abrasion-resistant concrete surface reinforcing agent and a preparation method thereof. The invention relates to a surface reinforcing agent for hydraulic anti-abrasion concrete. The surface reinforcing agent comprises sodium silicate, lithium silicate, a silane coupling agent, silica sol, a carbon nanotube dispersion liquid, a composite emulsion, a wetting agent, a dispersing agent, a penetrating agent, ethanol, a defoaming agent, nano calcium carbonate and deionized water. A compact C-S-H gel composite layer is constructed based on sodium silicate and lithium silicate, carbon nanotubes are cooperatively introduced to form a three-dimensional bridging structure, an interpenetrating network and an elastic constraint system are constructed by virtue of a composite emulsion, and meanwhile, the permeation efficiency is improved by virtue of a multi-component synergistic viscosity reduction system; the surface compactness, the anti-cracking toughness and the anti-abrasion performance of the concrete are obviously improved. The reinforcing agent disclosed by the invention is excellent in permeability, remarkable in reinforcing effect and suitable for surface modification treatment of concrete structures in extreme hydraulic environments such as high flow velocity and strong scouring.

The invention provides a preparation method of a hard carbon negative electrode material, the hard carbon negative electrode material and a sodium ion battery. The preparation method of the hard carbon negative electrode material comprises the following steps: taking coal chemical industry waste as a carbon precursor, crushing, and reacting with sulfuric acid to obtain an intermediate, with the concentration of the sulfuric acid being 30-80 wt.%; the intermediate and a catalyst are mixed and then subjected to carbonization treatment, the mixture is cooled to the room temperature at the cooling rate of 3-20 DEG C / min, carbide is obtained, and the catalyst comprises Fe2O3, B2O3 and ZnO; and after the carbide is subjected to acid pickling, a nano carbon film is formed on the surface through a magnetron sputtering technology. The preparation method provided by the invention can break through the bottleneck of the solid waste source carbon material in the aspects of structure and performance, and finally can realize the material performance with the initial coulombic efficiency of 90% or above, high magnification and long cycle life at the same time, thereby providing a brand new technical normal form for high-valued utilization of industrial solid wastes.

The invention discloses a method for preparing nano calcium carbonate by efficiently removing iron impurities in nano calcium carbonate raw material ore, and belongs to the technical field of nano material preparation. The method comprises the steps of raw material pretreatment, digestion treatment, size mixing treatment, carbonization treatment, surface treatment and drying, in the size mixing treatment process, a whitening agent Na2SO3 is adopted for removing iron in raw material ore, Na2SO3 serves as a reducing agent, Fe < 3 + > is reduced into Fe < 2 + >, a proper amount of whitening auxiliary such as DTPA or triethanolamine forms colorless water-containing iron chelate ions with iron ions, and the iron chelate ions are subjected to surface treatment. And through a synergistic system of the whitening agent and the whitening auxiliary agent, efficient removal of iron is realized. The whiteness of the prepared nano calcium carbonate reaches up to 97.2%, the nano calcium carbonate has the remarkable advantages of being efficient, environmentally friendly, economical and the like, the iron content in the nano calcium carbonate can be remarkably reduced, the purity and whiteness of the product are effectively improved, and the high requirement of the high-end application field for the quality of the nano calcium carbonate is met. Meanwhile, the method is simple and convenient to operate and easy to industrially apply, and has wide market prospects and popularization value.

The invention discloses a degradable film blowing material and a processing technology thereof, and relates to the technical field of degradable film blowing materials, the degradable film blowing material comprises the following preparation raw materials by mass: 50-70 parts of modified polylactic acid, 20-50 parts of PBAT resin, 5-20 parts of modified starch, 3-10 parts of nano calcium carbonate, 2-5 parts of talcum powder, 1-5 parts of a dispersant, 1-5 parts of a plasticizer, 0.1-1.0 part of an antioxidant and 0.5-1.5 parts of a lubricant. The processing method comprises the following steps: S1, drying modified polylactic acid and PBAT resin, and plasticizing modified starch; s2, mixing the preparation raw materials of the degradable film blowing material, extruding, and granulating to obtain degradable master batches; and S3, carrying out film blowing molding on the degradable master batch to obtain the degradable film blowing material. The degradable film blowing material is relatively high in tearing strength and notch impact strength, and still keeps a relatively high degradation rate.