297 results about "Nano sio2" patented technology

The invention discloses ultra-high performance concrete and a preparation method thereof. The ultra-high performance concrete comprises the following components in percentage by mass: 15%-25% of cement, 3%-6% of nano SiO2, 30%-35% of fly ash or steel slag powder, 35%-40% of recycled aggregate, 1%-4% of fiber, 0.5% of a microbial remediation agent and 1%-3% of nano TiO2. The preparation method comprises the following steps: S1, pretreating the recycled aggregate; and S2, packaging the microbial remediation agent: mixing the bacillus pasteurii spores with calcium lactate, and wrapping the mixture in calcium phosphate microspheres. S3, step-by-step stirring; S3.1, dry mixing: uniformly stirring the cement, the fly ash, the nano SiO2, the nano TiO2 and the recycled aggregate; s3.2, wet mixing is carried out, water solution fibers containing the polycarboxylic acid water reducing agent are added, uniform stirring is carried out, and the water-binder ratio of the water solution containing the polycarboxylic acid water reducing agent is 0.18; s3.3, final mixing: adding the packaged microbial remediation agent, and uniformly stirring; and S4, directional curing: performing steam curing at 80 DEG C for 48 hours, performing ultraviolet irradiation, and performing constant-temperature and constant-humidity curing for 7 days. The ultra-high performance concrete has the effects of low cost, low carbon emission, multi-function integration and repeatable crack self-repairing.

The invention discloses a transparent radiation refrigeration film and radiation refrigeration ceramic for building heat management and a preparation method of the transparent radiation refrigeration film and the radiation refrigeration ceramic. According to the film and the ceramic, SiO2 nano-particles are selected as base materials for achieving radiation refrigeration, dendritic silicon oxide nano-particles are adopted as inorganic particle emission materials of the film, PDMS is adopted as a polymer matrix, ITO coating PET is adopted as a flexible substrate, DMSNs are dispersed in PDMS, and the film is formed on the ITO-PET substrate through a blade coating technology. The white or colored ceramic takes spherical SiO2 nano-particles as a radiation refrigeration material and is sintered into white SiO2 porous ceramic, namely white radiation refrigeration ceramic, through phase inversion, and then the white radiation refrigeration ceramic is colored through chemical dye to form the colored ceramic. The radiation refrigeration film is good in transparency and bright in ceramic color, both the radiation refrigeration film and the ceramic have excellent radiation refrigeration performance, the transparent film can achieve the indoor cooling effect of about 12 DEG C on sunny days, and the colored ceramic can achieve the cooling effect of about 5 DEG C on sunny days.

The invention provides steam-cured alkali-activated fly ash concrete and a preparation method thereof. The steam-cured alkali-activated fly ash concrete is prepared from the following components in parts by mass: 30 to 40 parts of fly ash, 10 to 15 parts of slag, 10 to 20 parts of water glass, 60 to 80 parts of fine aggregate, 110 to 140 parts of coarse aggregate, 2 to 6 parts of water, 1 to 3 parts of nano SiO2 and 0.1 to 0.5 part of basalt fiber. The content of alkali in the water glass is 8.5-9.5%, and the modulus of the water glass is adjusted to 1.3-1.5 by using sodium hydroxide; the mass ratio of short fibers with the length of 6-12mm to long fibers with the length of 12-24mm in the basalt fibers is (0.5-2): 1. The alkali content, the water glass modulus and steam curing parameters are optimized, and meanwhile, nano SiO2 and basalt fibers are added for synergistic enhancement, so that the concrete has good crack resistance and compressive strength.

The invention relates to the technical field of building materials, and particularly discloses a slag and ardealite synergetic activated gypsum batten and a preparation method thereof.The slag and ardealite synergetic activated gypsum batten comprises pretreated ardealite, superfine slag powder, a composite exciting agent, reinforced fibers, self-repairing microcapsules, a foaming agent and water, and the composite exciting agent is formed by compounding nano SiO2, CaO and metakaolin; the preparation method comprises the following steps: mixing nano silica sol and a lignin solution, performing spray drying, and performing heat treatment to obtain the self-repairing microcapsule; the preparation method comprises the following steps: carrying out dry mixing on pretreated phosphogypsum, superfine slag powder and a composite exciting agent, adding water, adding reinforced fibers, self-repairing microcapsules and a foaming agent, stirring to form slurry, carrying out injection molding on the slurry, and carrying out stepped maintenance of pre-maintenance, main maintenance and carbonization treatment to prepare the modified red mud-pretreated phosphogypsum-based self-repairing self-repairing composite phosphogypsum-based self-repairing self-repairing composite phosphogypsum-based self-repairing composite phosphogypsum-based self-repairing composite phosphogypsum-based self-repairing composite phosphogypsum. The composite excitant synergistically activates the activity of the slag, and is matched with the reinforced fibers, the self-repairing microcapsules and stepped curing, so that solid waste resource utilization is realized, the compression resistance, bending resistance and impact resistance of the batten are improved, and the environment-friendly and high-performance effects are achieved.

The invention provides a dimming window assembly which comprises window glass (1), an adhesive (2), an adhesive film (3), an adhesive (4) and dimming glass (5), a cavity (6) is defined by the inner side of the window glass (1), the adhesive (2), the adhesive film (3), the adhesive (4) and the dimming glass (5), and the cavity (6) is filled with nano SiO2 aerogel particles or / and inert gas. Transparent glass on an existing vehicle window and an existing building window can be subjected to after-installation transformation, and therefore the functions of dimming, heat insulation, energy saving, displaying and the like of the existing window are achieved.

The invention relates to a base membrane for a composite current collector based on SiO2 nano composite modification and a preparation method of the base membrane. Synergistic modified nano SiO2 is compounded with aluminum hypophosphite, montmorillonite and the like to form modified auxiliary particles, the modified auxiliary particles and PET master batches are subjected to blending extrusion, and meanwhile, the surface of the base membrane is coated with a modified coating containing nano SiO2, so that the composite current collector is obtained. The mechanical property, the thermal stability and the flame retardance of the base film are obviously improved.

The invention provides a 180 DEG C-resistant microcapsule type cementing wall-fixing agent for water-based drilling fluid as well as a preparation method and application thereof, and belongs to the technical field of drilling. The preparation method of the wall fixing agent comprises the following steps: (1) respectively adding the macromolecular hydrophilic colloid and the emulsifier into deionized water, and stirring until the macromolecular hydrophilic colloid and the emulsifier are completely dissolved to obtain a water phase; (2) adding phenolic resin, the MUF prepolymer solution and nano SiO2 into an organic solvent under a stirring condition, and uniformly stirring to obtain an oil phase; (3) adding the oil phase obtained in the step (2) into the water phase obtained in the step (1), and carrying out shear emulsification to obtain an oil-in-water emulsion; and evaporating to remove the organic solvent in the system, filtering, washing, and drying to obtain the product. Under the multi-element synergistic effect of hydrogen bonds or coordinate bonds, Van der Waals force and the like, the microcapsule type cementing wall-fixing agent can accelerate the interface to form a compact cemented network structure, the cementing strength of rock particles is remarkably improved, and the purpose of strengthening the stability of a well wall is achieved.

The invention discloses a multi-hydrogen bond enhanced fluorine-containing core-shell water-based binder as well as a preparation method and application thereof, and relates to the technical field of lithium ion silicon-based negative electrode binders. The preparation method comprises the following steps: dissolving methyl methacrylate, acrylonitrile and an emulsifier in water, carrying out a polymerization reaction to obtain a rigid core emulsion, adding acrylic acid long-chain ester, a fluorine-containing monomer and acrylamide, carrying out a mixing reaction to obtain a core-shell structure emulsion, mixing the core-shell structure emulsion with a sodium alginate solution, adding nano SiO2, and carrying out a polymerization reaction to obtain the high-temperature-resistant water-based acrylic emulsion. And after the reaction is finished, obtaining the multi-hydrogen bond enhanced fluorine-containing core-shell water-based adhesive. Through core-shell structure design and introduction of a multiple hydrogen bond network, the problem of bonding caused by volume expansion of the silicon negative electrode material in the charging and discharging process is successfully solved, the cycle life and stability of the battery are remarkably prolonged, meanwhile, the environment-friendly characteristic and the process simplicity are considered, and the preparation method is simple and convenient. And an efficient and sustainable development solution is provided for the field of lithium ion batteries.

The invention discloses an environment-friendly PVC-U plastic pipe fitting and a manufacturing method thereof, and relates to the technical field of plastic waste recycling, and the environment-friendly PVC-U plastic pipe fitting is prepared from the following raw materials in parts by weight: 30-50 parts of regenerated PVC particles and 50-70 parts of raw PVC resin. Plasma-nano SiO2 co-activation is combined with a supercritical CO2 extraction technology, plasticizer residues in regenerated PVC are efficiently removed, the surface activity is improved, a multi-scale mechanical interlocking structure is constructed in cooperation with a four-level plant fiber reinforcing agent, gradient density design is combined, the ring stiffness larger than or equal to 8 kN / m < 2 > is achieved under the condition that no metal reinforcing layer exists, and the performance of the regenerated PVC is improved. Meanwhile, by utilizing the synergistic effect of maleic anhydride grafting modification and pulsed magnetic field orientation curing, the compatibility of the reclaimed material and primary resin is improved, a modulus gradient interface is formed, stress concentration is effectively relieved, the recovery rate of the waste PVC pipe is increased, and the product has the self-cleaning and electromagnetic shielding functions.

The invention belongs to the field of material surface treatment, and relates to a glass explosion-proof rubber coating process. According to the process, alpha-Al2O3 nanoparticles and fatty acid grafted modified nano SiO2 are prepared, a nano composite adhesive containing aramid fibers and nickel hydroxyl iron powder is prepared in combination with a three-stage dispersion process (mechanical shearing, ultrasonic cavitation and rolling grinding), and a glass surface nano rough interface is constructed in combination with plasma treatment and a PECVD (Plasma Enhanced Chemical Vapor Deposition) technology. A magnetoelectric synergistic coating (magnetic field orientation + vacuum infiltration + gradient pressure + electrostatic overlock) and electromagnetic curing-gradient cooling process is adopted to realize uniform coating and rapid crosslinking of an adhesive layer. Through cooperation of material modification and a multi-field coupling process, the impact energy absorption of an adhesive layer is greater than or equal to 80%, the interface bonding strength reaches 22MPa, the curing time is shortened by 50%, degumming is avoided in an extreme environment, and the thickness deviation of the adhesive layer is + / -5 [mu] m. By adopting natural raw materials and a low-VOC formula, the anti-explosion glass is suitable for scenes such as building curtain walls and automobile glass, the anti-explosion performance is improved, and the service life is prolonged.

The invention belongs to the technical field of building materials, and particularly relates to a preparation method of a biomass reinforced cement-based thermal insulation wall material and the wall material. The preparation method comprises the following steps: (1) crushing wood fibers, putting the crushed wood fibers into a NaOH solution, washing with water and drying; (2) carrying out dry mixing on cement, the modified wood fiber, nano SiO2 particles and calcium stearate; (3) diluting hydrogen peroxide with warm water, adding into the mixture, and stirring; (4) injecting the foaming slurry into a mold, and vibrating; and (5) steam curing. Through a collaborative technology of fiber surface modification, nano-particle regulation and control and hydrophobic layer construction, the comprehensive performance breakthrough of the fireproofing grade of A1 grade, the heat conductivity coefficient of 0.048-0.055 W / (m.K) and the compressive strength of 1.2-1.8 MPa is realized. The energy consumption is reduced by 70% through the low-temperature steam curing process, the proportion of agricultural waste is larger than or equal to 30%, the carbon emission intensity is smaller than or equal to 150 kgCO2 / m < 3 >, and the requirement for green buildings is met.

The invention discloses a battery module aerogel buffer heat insulation pad, and belongs to the technical field of new energy automobile battery heat management. According to the technical scheme, the battery module aerogel buffer heat insulation pad comprises an aerogel felt layer located in the middle, and double buffer frame structures and composite protective films are sequentially arranged on the two sides of the aerogel felt layer from inside to outside; the aerogel felt layer is composed of a nano SiO2 aerogel and graphene composite skeleton, the thickness is 1.5 mm + / -0.1 mm, the heat conductivity is less than or equal to 0.015 W / (m.K), and the addition amount of graphene is 1.5% + / -0.3% of the mass of the SiO2 aerogel; the double-buffer frame structure comprises an inner MPP honeycomb frame and an outer silicone rubber montmorillonite frame; through the composite design of the aerogel felt layer and the double-buffer frame structure, the temperature difference of cold and hot surfaces of more than or equal to 170 DEG C and the compression ratio of 25%-40% under 2MPa are realized under the thickness of 1.5 mm, meanwhile, the gradient buffer structure adapts to the expansion stress of the battery, and the composite material has the characteristics of realizing high-strength support, multi-stage buffer and flame-retardant phase change cooperative control in a thin structure.

The invention discloses a preparation method of a coarse-denier high-strength polyethylene fiber and a polyethylene fiber.The preparation method comprises the steps that a nano modifier is prepared, the nano modifier is hyperbranched polyethylene modified nano SiO2, and polyethylene powder, white oil, the nano modifier and an antioxidant 1010 are mixed to form a mixed solution; and extruding the mixed solution to form gel fibers, standing the gel fibers to obtain oil, and carrying out three-stage extraction with an ionic liquid, drying and stretching to form the polyethylene fibers. The nano modifier is adopted as a raw material of the polyethylene fiber and is hyperbranched modified nanoparticles, the dispersion uniformity of the nanoparticles can be ensured due to small volume steric hindrance of the nanoparticles, and long-chain alkyl outside the particles and a polyethylene molecular chain have very good compatibility; meanwhile, bidirectional permeation and diffusion of the extraction agent and the solvent are greatly promoted, the extraction process is accelerated, solvent residues can be reduced, and the mechanical property of the prepared fiber is effectively improved.

The invention belongs to the technical field of polymer insulating materials, and particularly relates to an epoxy resin composite insulating material and a preparation method thereof. The composite material comprises the following components in parts by weight: 60-70 parts of epoxy resin, 5-8 parts of acetone, 12-15 parts of modified glass fibers, 1-2 parts of nano SiO2, 5-8 parts of polyurethane microspheres, 10-12 parts of micron Al2O3, 2-3 parts of epoxy monomer microcapsules, 8-10 parts of a curing agent and 3-5 parts of a modifier. The material cost is effectively reduced on the premise of ensuring the insulating strength, the thermal conductivity and the mechanical property, and the influence of the high-viscosity nano filler on the processing fluidity is reduced by compounding the micron Al2O3 and the nano SiO2; nano SiO2 is directionally deposited on the surface of the fiber through electrostatic spraying, a local high-concentration nanophase is formed in an interface area, the high-proportion nano SiO2 adding requirement of a traditional matrix is replaced, the total nano material dosage is effectively reduced, and the cost is remarkably reduced.

The invention relates to the technical field of PC alloys, in particular to an impact-resistant flame-retardant PC alloy with melt flowability and a preparation method of the impact-resistant flame-retardant PC alloy with melt flowability, and the impact-resistant flame-retardant PC alloy with melt flowability comprises the following components in parts by mass: 60-70 parts of PC resin; 30 to 40 parts of ABS resin; 6-10 parts of a core-shell flame retardant; 5-8 parts of a toughening agent; 0.5 to 1.0 part of a compatilizer; 0.3 to 0.5 part of an antioxidant; 1.0 to 1.5 parts of other auxiliary agents; the core-shell flame retardant comprises nano SiO2 loaded with sulfonate, low-molecular-weight PC (polycarbonate) and epoxy polysiloxane in sequence from inside to outside, wherein the weight-average molecular weight of the low-molecular-weight PC is 5000-8000; the toughening agent is prepared by mixing an organic silicon toughening agent, MBS and hydrogenated SBS; the serious negative influence of the existing flame retardant on the mechanical property and the processability of the PC / ABS alloy is overcome, so that the material meets the UL94 V0 level, and meanwhile, the balance optimization among the properties is realized.

The invention discloses low-carbon concrete based on waste lithium slag. The low-carbon concrete is characterized by comprising the following components in parts by weight: 100-150 parts of cement, 50-80 parts of fly ash, 130-150 parts of modified lithium slag composite powder, 900-950 parts of fine aggregate, 1050-1150 parts of coarse aggregate, 6-10 parts of a water reducing agent and 160-180 parts of water, the modified lithium slag composite powder is prepared from the following components in parts by weight: 75 to 80 parts of lithium slag, 8 to 12 parts of mineral powder, 5 to 10 parts of light calcined magnesia, 2 to 4 parts of limestone powder, 0.1 to 0.2 part of nano SiO2 powder and 0.1 to 0.2 part of gamma-phase nano aluminum oxide; by improving the activity, dispersion and apparent morphology of the lithium slag, the harm of the lithium slag to the durability of the concrete is reduced, and the proportion of the lithium slag in a cementing material is increased, so that the cement consumption is reduced, and the effects of concrete production cost, energy conservation and emission reduction are achieved.

The invention discloses a modified FeSiCr soft magnetic material, a preparation method thereof and application of the modified FeSiCr soft magnetic material in marine environment devices, and belongs to the technical field of soft magnetic materials. Comprising flaky FeSiCr soft magnetic powder, and a Ni-P alloy layer, a dopamine-quaternary ammonium salt copolymer grafting layer, a tannic acid-metal ion layer, a nano SiO2-Al2O3 layer and a polysiloxane resin-boron nitride layer which sequentially coat the FeSiCr soft magnetic powder from inside to outside, and the preparation method comprises the steps of chemical plating, grafting modification, sol-gel sintering and hot press molding. Through the synergistic effect of the five coating layers, the modified FeSiCr soft magnetic material achieves comprehensive improvement of corrosion resistance, antibacterial property, insulativity and magnetic performance in the marine environment, is suitable for marine anti-corrosion wave-absorbing coatings, high-frequency electromagnetic elements and other scenes, and has the advantages of being long-acting in service, high in environmental adaptability and the like.

The invention provides a lime-sand polymerized building material for inhibiting saltpetering and a preparation method thereof, and belongs to the technical field of novel building materials, the material comprises a composite matrix material, a composite alkali activator, a slow-release organic acid microcapsule, a modified layered double-metal hydroxide and an saltpetering inhibiting auxiliary agent; the composite base material is formed by compounding fly ash and slag; the composite alkali activator is compounded by water glass and a NaOH aqueous solution; the slow-release organic acid microcapsule is prepared by coating a compound acid formed by mixing citric acid and tartaric acid with hydroxypropyl-beta-cyclodextrin and sodium alginate; the modified layered double hydroxide is prepared by calcining MgAl-LDH, then carrying out surface modification by a silane coupling agent, and then loading nano SiO2; the saltpetering inhibition auxiliary agent is compounded by phytic acid modified lignin microcapsules and thermal response carbonate; the phytic acid modified lignin microcapsule is prepared by modifying sodium lignin sulfonate with phytic acid and then coating with ethyl cellulose and polyvinyl alcohol; the thermal response carbonate is prepared by coating calcium carbonate with stearic acid.

The invention discloses a high-temperature-resistant anti-adhesion superhard transparent fluorine-free green organic silicon coating and a preparation method thereof, and belongs to the technical field of organic silicon coatings. According to the invention, methyltrimethoxysilane, silica sol, hydroxyl silicone oil, isopropanol and water are used as raw materials to prepare a high-temperature-resistant anti-adhesion superhard transparent fluorine-free green organic silicon coating, and a design strategy of manufacturing a nanoscale polysiloxane coating through an organic silicon precursor controllable sol-gel hydrolysis process is adopted. According to the present invention, the coating with the matrix completely composed of the in-situ generated nano SiO2 particles is prepared, the defect minimization and the highly-crosslinked Si-O-Si network structure are achieved, the nano-scale inorganic structure has long-term thermal stability, and the visible light transmittance of the coating can achieve 98% due to the inhibition of the light scattering by the sub-wavelength particle size; and tiny nano particles are uniformly and tightly arranged on the surface of the coating, so that the coating is endowed with ultrahigh hardness. In addition, the coating still maintains the inherent antifouling property of the organic silicon coating.

The invention relates to the technical field of carbon fiber sizing agents, in particular to a preparation method and application of a self-emulsifying cationic waterborne polyurethane emulsion sizing agent. The preparation method comprises the following steps: firstly, preparing the cationic waterborne polyurethane emulsion by adopting a self-emulsifying method, then mixing the cationic waterborne polyurethane emulsion with the lubricant, the surfactant and the coupling agent, adding distilled water, and stirring and diluting to prepare the sizing agent. According to the cationic waterborne polyurethane emulsion prepared by the method disclosed by the invention, the performance of the emulsion is improved, and the cationic waterborne polyurethane emulsion can be prepared by changing different synthesis raw materials, the ratio of the raw materials and the content of a solid intermediate and introducing a nano SiO2 structure. The emulsion has different hydrophilicity and lipophilicity, different particle sizes and different heat resistance degrees, is applied to fiber production with different requirements, and has the properties of improving the chemical bonding property and wettability of a resin and fiber interface, improving the tensile strength of fibers, enhancing the interlaminar shear strength of composite materials and the like.

The invention discloses an efficient consolidation agent for tailings in an underground mine filling mining method and a preparation method thereof, and relates to the technical field of consolidation agents, the consolidation agent is prepared from a gelling base material, a nano reinforcing agent, a chemical exciting agent and an organic fiber reinforcing agent according to a specific mass ratio; aiming at the problems of unstable volume, insufficient strength and the like of a traditional consolidation agent, through high-temperature calcination of the steel slag to eliminate harmful components, dealkalization treatment of the red mud, acid activation of the phosphogypsum and volcanic ash reaction of the fly ash, the volume stability and the gelling activity of a filling body are remarkably improved, and the consolidation agent is suitable for complex underground environment requirements; aiming at the pain points of low early strength, weak interface bonding and the like of the consolidation agent, the cohesion is improved by strong bonding of the surface-modified nano SiO2 and a gelling base material, a chemical exciting agent is added to cooperate with CO2 carbonization to generate nano crystal nucleuses, hydration sites are provided, a pore structure is optimized, bleeding is inhibited, the fluidity and stability of slurry can be effectively improved, and the consolidation effect is good. And the requirements of underground filling homogeneity and pumpability are met.

The invention relates to the technical field of composite coating preparation materials for battery diaphragms, in particular to a composite coating for a battery diaphragm as well as a preparation method and application. The invention discloses a graphene quantum dot / carbon nanotube composite material, which is prepared from the following components in percentage by weight: 3 to 8 percent of aminated graphene oxide-polydopamine graft, 10 to 18 percent of polyimide-polyetheretherketone-nano SiO2 hybrid, 2 to 5 percent of hydroxyapatite-montmorillonite core-shell particles, 0.5 to 3 percent of zinc borate-melamine cyanurate compound, 1 to 3 percent of graphene quantum dot-carbon nanotube hybrid, 2 to 6 percent of sodium carboxymethyl cellulose and 50 to 70 percent of deionized water. 0.5 to 2 percent of barium strontium titanate nanocrystalline or 1 to 3 percent of polyethylene glycol-polypropylene glycol segmented copolymer can also be added. All the components are combined through molecular-level reaction to construct a high-performance protection network. The composite coating is good in high temperature resistance and mechanical strength, high in ionic conduction efficiency, excellent in flame retardant effect and good in interfacial compatibility, the preparation process is environmentally friendly and easy to industrialize, the composite coating is suitable for various batteries, and the comprehensive performance of the composite coating is superior to that of a traditional coating.

The invention relates to the technical field of agricultural films, and particularly discloses a preparation method of a light nano regulating agent, which comprises the following steps: step 1, preparing materials: preparing an aluminate coupling agent and an inorganic nano material dispersing agent in a weight ratio of 2: 100; 2, mixing: stirring the raw materials prepared in the step 1 at a high speed, and fully mixing the raw materials to prepare a modified inorganic nano material dispersing agent; 3, the weight ratio of the color regulating agent to the modified inorganic nano material is 10: 100, and the light nano regulating agent is prepared after high-speed stirring and mixing; the inorganic nano-material dispersing agent is one or more of nano BaSO4, nano CaCO3 or nano SiO2, a high-speed stirrer is used for high-speed stirring in the step 2, the aluminate coupling agent reacts with hydroxyl or carboxyl on the surface of the inorganic nano-dispersing agent through alkoxy, and the hydrophilic nano-material is converted into organic affinity, so that the interface bonding force between the hydrophilic nano-material and the resin is enhanced; the light nano regulating agent has the characteristics of simple process and low cost, and the light conversion performance of an agricultural film can be improved by using the light nano regulating agent to prepare the agricultural film.

The invention relates to a halogen-free flame-retardant flexible bending-resistant low-voltage power cable and a manufacturing method thereof. An insulating layer of the cable is made of a core-shell type nano composite phase change material, a core layer is made of a polyethylene glycol / paraffin phase change material, a shell layer is made of polyurethane or modified polyamide nano fibers and nano SiO2 particles, and the cable is prepared by adopting a coaxial electrostatic spinning technology. According to the structure, stress can be effectively dispersed when the cable is bent, crack propagation is reduced, the temperature is adjusted through the phase change material, and local overheating is prevented. The three-dimensional network structure enhances the bending resistance of the cable, the bending life is prolonged by 40%-60%, and the halogen-free flame retardant performance is ensured at the same time. The technology realizes collaborative optimization of temperature adjustment, stress buffering and bending resistance, and is suitable for power cables with high requirements.

The invention provides an epoxy resin wear-resistant coating and a preparation method thereof, and belongs to the technical field of polymer composite materials. The epoxy resin wear-resistant coating is prepared from the following raw materials in parts by mass: 100 parts of epoxy resin, 2 to 20 parts of composite filler, 5 to 30 parts of curing agent, 0.2 to 4 parts of defoaming agent and 0.5 to 5 parts of flatting agent, the composite filler is PTFE and a modified inorganic filler; the modified inorganic filler is a compound system of modified nano SiO2, modified nano ZnO, modified MoS2 and modified nano Al2O3. According to the invention, the antifriction material and the reinforcing material are compounded, and the silane coupling agent is used for surface modification, so that firm combination of the filler and the epoxy resin matrix is realized. MoS2 and PTFE provide a continuous lubricating effect, and the friction coefficient is reduced; the hardness, the strength and the bearing capacity of the coating are remarkably improved through the nano oxide particles, and the coating has the characteristics of low friction and high wear resistance through the synergistic effect of the nano oxide particles and the coating.

The invention discloses a full-tailing filling body enhanced carbon sequestration method based on bubble regulation and control, and belongs to the technical field of mine filling materials, and the method comprises the following steps: uniformly stirring raw materials; then carrying out ultrasonic treatment in cooperation with double-frequency ultrasonic waves to obtain full-tailing mixed slurry; and the full-tailing mixed slurry is subjected to pouring, damp-heat curing and carbon dioxide atmosphere curing, and the full-tailing filling body is obtained. Wherein except water, the raw materials comprise the following components in percentage by mass: 80% of tailings, 12% of cement, 2%-5% of nano SiO2, 1%-3% of nano ZrO2, 0.05%-1% of hydroxypropyl methyl cellulose, 0.1%-0.5% of an air entraining agent and 0.5%-1.5% of nano MgO; the air entraining agent is obtained by compounding an anionic surfactant and a protein natural foaming agent. According to the method, stable bubbles are formed through the synergistic effect of the air entraining agent / foam stabilizer, the nano ZrO2 is combined to enhance the interface and the nano SiO2 is combined to optimize the pore connectivity, and the nano MgO active component is supplemented, so that the synergistic improvement of high strength, high air permeability and efficient carbon sequestration of the filling material is realized.

The invention relates to the technical field of polymer composite materials, in particular to a TPE-PP composite material for a folding joint of a pet trolley and a preparation method of the TPE-PP composite material. The problems that an existing joint material is insufficient in fatigue resistance and limited in environmental adaptability are solved. The composite material adopts a three-layer structure: a base layer takes high-crystallinity polypropylene as a matrix, and glass fiber reinforcement and elastomer toughening are assisted, so that high rigidity and high strength are realized; the functional layer is composed of a fatigue-resistant thermoplastic elastomer composite system and contains strengthening components such as nano SiO2 so as to disperse stress and prevent crack propagation; the surface layer is a functional layer and contains polytetrafluoroethylene micro powder to provide self-lubricating property, a silver-loaded zinc zeolite antibacterial agent to endow antibacterial and mildew-proof properties, and an anti-ultraviolet additive to improve weather resistance. The three layers form an interpenetrating network structure through co-extrusion and are crosslinked through electron beam irradiation, so that the interlayer binding force is improved. The material can remarkably prolong the service life of the folding joint of the pet trolley and improve the use safety and environmental adaptability.

The invention relates to a Si3N4 in-situ modified carbon-based composite material and a preparation method and application thereof.The method specifically comprises the steps that coke powder and graphite or carbon black are mixed, then the mixture and nano SiO2 are mixed and dried to obtain mixed powder, then asphalt is added, mixing and kneading are conducted at the temperature of 280-320 DEG C to form paste, finally, the paste is rolled, segmented and crushed, and a fine particle mixture is obtained; performing cold isostatic pressing on the fine particle mixture to obtain a sintered blank, and then roasting to obtain a carbon-based composite material; and heating the carbon-based composite material in a nitrogen atmosphere, carrying out low-temperature graphitization, and carrying out an in-situ reaction on the carbon-based composite material and Si3N4, so as to obtain the Si3N4 modified carbon-based composite material after the reaction is finished. According to the invention, the Si3N4 in-situ modified carbon-based composite material is prepared by introducing Si-C inert bonds and vacuum lubrication Si3N4 and adopting an in-situ reaction introduction method, so that the vacuum lubrication performance of the pure carbon sliding current collection material is improved on the basis of not reducing the wear resistance of the pure carbon sliding current collection material.

The invention discloses a preparation method of antibacterial enhanced ABS (acrylonitrile-butadiene-styrene) plastic, and relates to the field of ABS plastic. A hyperbranched polylactic acid network and an ABS matrix form an interpenetrating structure, and molecular chain slippage is jointly inhibited by a cross-linking point of trimethylolpropane triacrylate and a physical enhancement effect of nano SiO2, so that the tensile strength and the impact strength of the material are improved; bacterial cell membranes are destroyed through a quaternary ammonium salt group with positive electricity, synthesis of fungal cell walls is interfered and formation of biological membranes is inhibited through boric acid molecules, hypha colonization is physically hindered through high crosslinking density of a hyperbranched PLA network, and therefore the bacteriostasis rate on bacteria and fungi is increased.

The invention discloses a high-stability antistatic master batch for a BOPP (biaxially-oriented polypropylene) film and a preparation method of the high-stability antistatic master batch. The master batch comprises a polypropylene carrier, a core-shell structure composite antistatic agent, a compatilizer, nanoscale SiO2, a stabilizer and a dispersing agent. The preparation method comprises the following steps: firstly, melting and mixing monoglyceride and amide in proportion, and then adding nano SiO2 for high-speed mixing to form a core-shell structure; primarily mixing the polypropylene carrier, the compatilizer, the stabilizer and the dispersing agent; finally, the core-shell structure composite antistatic agent and the primary mixture are subjected to final mixing, and the mixture is subjected to melt extrusion granulation through a double-screw extruder. Through the unique core-shell structure design, the migration rate of the antistatic agent is effectively controlled, so that the prepared BOPP film has lasting and stable antistatic performance, the surface resistance is maintained at 1011-1012 omega, meanwhile, excellent optical performance is maintained, the haze does not exceed 2.0%, and the strict requirements of high-end electronic product packaging are completely met.