124results about How to "High specific surface energy" patented technology

The invention relates to a graphite silicon-based composite anode material for a lithium ion battery and a preparation method thereof. The graphite silicon-based composite anode material comprises a nano-silicon cracked carbon composite material, graphite and a carbon material coating layer. The preparation method comprises the following steps: firstly, nano-silicon is obtained by a high-energy wet mechanical milling method; secondly, nano-silicon and a polymer with high carbon residue are compounded by dispersion polymerization so as to form a polymer/nano-silicon composite microsphere emulsion with nano-silicon inlaid in polymeric microspheres; thirdly, the microsphere emulsion and graphite are compounded; and finally, solid-phase coating is carried out by the use of an organic carbon source, and heat treatment is conducted to obtain the graphite silicon-based composite anode material for a lithium ion battery. By the above method, the problem that nano-silicon is liable to agglomeration, especially agglomeration of nano-silicon from a liquid disperse state to a dry state, due to low granularity and high specific surface energy is solved. The anode material has characteristics of high specific capacity (greater than 550mAh/g), high initial charge discharge efficiency (greater than 80%) and high conductivity.

The invention discloses a preparation method of low-temperature curing high-conductivity slurry and a conductive film. The low-temperature curing high-conductivity slurry is prepared by blending organic carriers with purpose-made nanometer stage silver powder mixed with a small amount of graphene as conductive filling materials. The conductive filling materials use nanometer stage silver powder compounding graphene, has the characteristic of high compactness, and enables the conducive rubber to form a better conductive path when being applied to the conductive rubber. The conductive slurry comprises double ingredients, and has the advantage of long storage period. Compared with the prior art, the preparation method has the advantages of low-temperature curing, high conductivity, high anti-shearing intensity, long storage period and the like and can be widely applied to printing circuit and LED (light emitting diode) chip bonding in electronic devices.

The invention discloses a high-toughness haydite concrete and a preparation method thereof. The high-toughness haydite concrete is prepared from the following raw materials in parts by weight: 320-360 parts of cement, 40-80 parts of lithium slag powder, 20-40 parts of silica fume, 700-900 parts of regenerated coarse aggregate, 500-800 parts of haydite, 3-4 parts of water reducing agent, 100-120 parts of water, 10-20 parts of polyacrylate, 20-30 parts of toughening additive, 0.05-0.1 part of sodium gluconate and 10-15 parts of triethanolamine. A modified composite carbon nano material, activated wood meal and isotactic polypropylene are combined to prepare the unique toughening additive under the surface modification actions of a coupling agent and a compatilizer; and the toughening additive can be sufficiently dispersed in the concrete to effectively display the synergic toughening effect of the materials, so that the prepared concrete has the advantages of favorable toughness, favorable fatigue resistance, favorable isotropy, favorable impact resistance, favorable earthquake resistance and favorable crack resistance.

The invention discloses a preparation method for a functional film capable of simultaneously realizing oil-water emulsion separation and dye removal. The method comprises the following steps: (1) preparing a polymer matrix solution; and (2) combining a hydroxyl-containing substrate with the polymer matrix solution, and enabling acceleration of gelation and introduction of charged functional groupsto be realized in one step to obtain the functional film capable of simultaneously realizing the oil-water emulsion separation and the dye removal. According to the method disclosed by the invention,the polymer matrix solution gives high specific surface energy to the hydroxyl-containing substrate, so that super-hydrophilic underwater super-oleophobic performance is obtained, and high-efficiencyseparation of oil and water can be realized; and the charged functional groups are introduced, organic dye is adsorbed through electrostatic interaction, so that the organic dye is removed, and finally dye pollutants are removed while an oil-water emulsion is separated only by gravity.

The invention discloses a preparation method of a graphene oxide/konjac glucomannan degradable composite film material. The preparation method is characterized by comprising the steps of: preparing graphene oxide aqueous solution with mass percent concentration of 0.01-1%; adding konjac glucomannan in the graphene oxide aqueous solution under stirring according to a proportion that the mass ratio of graphene oxide to konjac glucomannan is 1: 1-200, stirring for 0.5-3 hours at 30-60DEG C, and standing to obtain a film solution; pouring the film solution in a die for manufacturing a film, drying in a drying oven, cooling, and uncovering the film to obtain the composite film; and placing the composite film in glutaraldehyde aqueous solution, reacting for 1-5 hours at 5-60DEG C, taking out, and drying to obtain the graphene oxide/konjac glucomannan degradable composite film material. The material prepared by the method has the advantages of good mechanical property, high heat stability, good degradability and biocompatibility and the like, and can be used as a tissue engineering support material or a package material.

The invention belongs to the technical field of electronic ceramic preparation and application, and particularly relates to a method for fine synthesis of a ternary MgO-Nb2O5-TiO2 system microwave dielectric ceramic by using a sol-gel method. The technical scheme comprises adopting a sol-gel method to finely synthesize a ternary MgO-Nb2O5-TiO2 system microwave dielectric ceramic, and specifically comprises: 1) preparing a citric acid aqueous solution of Mg ions; 2) preparing a citric acid aqueous solution of Ti ions and Nb ions; and 3) synthesizing a ternary MgTiNb2O8 microwave dielectric ceramic nanometer precursor, and preparing the ceramic. The ternary MgO-Nb2O5-TiO2 system microwave dielectric ceramic has significant advantages of low synthesis temperature, uniform ceramic particles, good ceramic particle dispersity, pure phase, nano-scale powder (particle size of about 50 nm), high specific surface energy, high activity and the like. In addition, compared with the conventional solid-phase method, the method of the present invention has the following characteristics that: the sintering temperature can be significantly reduced by 100-200 DEG C so as to achieve low temperature sintering, maintain the good microwave dielectric property, and meet the LTCC application requirements.

The invention discloses a preparation method of an antistatic filter material, and belongs to the technical field of filter materials. The preparation method comprises the following steps: depositing a first conductive layer on a base cloth layer; loading second conductive layers on the surfaces of fiber layers by using an electrostatic spinning process; placing the treated base cloth layer between the two fiber layers, and fixedly binding the base cloth layer and the fiber layers together through needling or spunlacing. The filter material prepared by the preparation method is high in filter efficiency, antistatic property and high-temperature resistance.

The invention relates to preparation of graphene oxide nanometer modified acrylate aqueous dispersion and application of the same to waterborne automobile coating, belongs to series of waterborne automobile coating, and discloses a method for preparing graphene oxide nanometer modified acrylate aqueous dispersion. The preparation and the application have the advantages that special physical and chemical performance of nanometer materials and merits of acrylate are sufficiently combined with one another, accordingly, the graphene oxide nanometer modified acrylate aqueous dispersion is excellent in performance in the aspects of mechanical properties, solvent resistance, stability and the like, formed paint films are high in gloss, good in fullness and solvent resistance and excellent in mechanical performance, the comprehensive performance can be greatly improved, environments can be protected, energy can be saved, and the graphene oxide nanometer modified acrylate aqueous dispersion is high in operability and convenient to popularize and apply and has a broad market prospect.

The invention discloses a low-impedance interface processing method of a solid-state lithium battery positive electrode and a positive electrode structure. By the method, impedance of two interfaces between active material particle in a positive electrode plate and solid-state electrolyte particle and between the positive electrode plate and an electrolyte piece can be effectively reduced, so thatthe capacity of active positive electrode particle in the solid-state lithium battery can be effectively developed. The dual-layer structure ceramic piece comprising a solid-state electrolyte layer and a positive electrode layer and fabricated by the method is excellent in performance and has favorable application prospect in the field of solid-state lithium batteries.

The invention provides an adhesive for an anticorrosive paint for deep-sea oil-gas delivery steel tube outer walls and a preparation method thereof. The adhesive is prepared from the following raw materials in percentage by mass: 55-70% of polypropylene, 20-30% of functional polyolefin, 2-6% of reactive monomer, 1-3% of graphene, 2-5% of nano CaCO3, 0.1-0.6% of initiator, 0.4-0.8% of nucleating agent and 0.1-1.5% of antioxidant. The preparation method comprises the following steps: mixing the raw materials, stirring uniformly, putting in a double screw extruder, carrying out compounding and plastifying, drawing, cooling with water, airing, granulating, extruding for granulation, and packaging to obtain the adhesive. The adhesive has excellent mechanical properties, higher low-temperature impact resistance and wide application range.

A method for preparing porous fluorapatite ceramic adsorbing radioactive nuclide is characterized by including: using the materials in percent by weight: 50-80% of calcium pyrophosphate, 4-26% of calcium fluoride and 16-45% of calcium carbonate, and mixing, ball-milling, drying, press-forming, calcining, grinding, and screening to obtain fluorapatite powder; mixing the fluorapatite powder with polyethylene glycol solution, methyl cellulose solution and hydrogen peroxide solution, and performing microwave assisted pore-forming, drying and the like to obtain a porous fluorapatite ceramic blank; preparing porous fluorapatite ceramic adsorbing material via normal pressure sintering. The porous fluorapatite ceramic adsorbing material prepared herein has the advantages of high radiation stability, good thermal stability, high mechanical and chemical stability and the like, also has high specific surface energy and nuclide adsorbing capacity and may be used as an efficient adsorbing material for radioactive nuclide in high-radioactive waste liquid, thus effectively protecting human health and ecological environment.

A preparation method of nano palladium oxide catalyst comprises following steps: (1) preparing a nano palladium array and an alumina composite structure; (2) extracting the nano palladium array; (3) subjecting the nano palladium array to a heat treatment to obtain a nano palladium oxide array. The operation of the preparation method is simple. The pH value is adjusted through controlling the ammonia liquor concentration in the electro-deposition solution. The electro-deposition current density, the electro-deposition time, and the temperature and time during the heat treatment process are controlled to prepare a nano-grade palladium oxide array, which has a relatively high specific surface energy and catalyzing ability. The morphology of the nano palladium oxide is controllable, the size of the nano palladium oxide is the same, the application range is wide, and the nano palladium oxide is especially suitable for applications of tailing gas purifying technology in the automobile industry.

The invention is a palmityl trimethyl ammonium bromide expansive soil modifier, characterized in comprising the preparing steps of: (1) at room temperature, preparing saturated lime water solution; (2) weighing the needed palmityl trimethyl ammonium bromide in the mass ratio of palmityl trimethyl ammonium bromide to dry soil = 0.5 : 99.5; (3) dissolving the palmityl trimethyl ammonium bromide in the saturated lime water solution, where it needs to notice that the dosage of the saturated lime water solution is able to completely dissolve the palmityl trimethyl ammonium bromide. And the advantages: making the soil property still able to reach the specified standard under the water influence; improving engineering property of expansive soil; unable to cause environmental pollution. And its construction method uses osmotic modification principle and fully uses multi-crack property of expansive soil and is simple and convenient.

The invention belongs to the technical field of electronic ceramic preparation and application, and in particular relates to a method for finely synthesizing ilmenite-structured ZnTiO3 series microwave dielectric ceramic nano powder by using a water-soluble sol-gel process. The method comprises the following steps: 1) preparing a citric acid solution of Zn ions; 2) preparing a citric acid solution of Ti; 3) synthesizing a ZnTiO3 microwave dielectric ceramic nano precursor. As oxides and inorganic nitrate which are low in price are taken as raw materials, and expensive alkoxides are not used, the synthesized powder has the remarkable advantages that the synthesis temperature is low, the ceramic particles are uniform, good dispersity is achieved, the phase is pure, various elements can be finely doped and modified, the prepared powder has the nano particle size (about 30nm), is high in specific surface property and is relatively high in activity, later low-temperature sintering can be achieved, and LTCC application requirements can be possibly met.

The invention provides a 3PE anticorrosive paint epoxy bottom layer for an outer wall of a deep sea oil and gas transmission steel pipe and a preparation method of the epoxy bottom layer. The epoxy bottom layer comprises the following raw materials in percentage by mass: 60%-75% of epoxy resin, 5%-10% of a silane coupling agent, 0.5%-1.5% of graphene oxide, 2%-5% of gaseous phase SiO2 and 15%-30% of a curing agent. The preparation method comprises the following steps: mixing the raw materials evenly; carrying out ultrasonic treatment; putting into a stirrer and stirring evenly; and heating and solidifying, so as to obtain the epoxy bottom layer. The epoxy bottom layer has excellent mechanical property and wide application; and particularly, the anti-tensile shearing strength and the impact strength are improved.

The invention relates to a medical titanium or titanium alloy surface activation modifying method which comprises the steps of: 1, with a surfactant modified monodisperse polystyrene (PS) sphere as a template and an inorganic titanium salt water solution as a precursor solution, preparing a processing solution; 2, with pure titanium or titanium alloy as a matrix, immersing the pure titanium or titanium alloy in the processing solution, and keeping the temperature of the processing solution to be 60-100 DEG C for 24-50h, wherein UV-irradiation is carried out within at least 0.25-2h, and the matrix is soaked in the processing solution with the temperature of 60-100 DEG C; and taking the soaked matrix out, immersing into an organic solvent capable of dissolving the PS for soaking to remove the PS, soaking and crystallizing in deionized water, and completing the deposition of a film. The self-assembling nano crystal titanium dioxide microcapsule biological film is prepared by using the monodisperse polystyrene sphere as the template and the low-price inorganic titanium salt as the raw material at low temperature through a hydrolysis-sol method, and has better bioactivity.

The invention discloses a composite toughened grouting cement mortar and a preparation method thereof. The composite toughened grouting cement mortar is prepared from the following raw materials in parts by weight: 80-100 parts of cement, 120-180 parts of 50-200-mesh fine sand, 20-50 parts of water, 5-10 parts of polyurethane solution, 5-10 parts of epoxy resin emulsion, 10-15 parts of toughening additive, 1.5-6 parts of early-strength admixture, 2-9 parts of methacrylic acid, 2-6 parts of calcium formate, 2-8 parts of neopentyl glycol, 0.2-0.8 part of sodium dodecyl benzene sulfonate and 0.9-2.4 parts of water reducing agent. A modified composite carbon nano material, activated wood meal and isotactic polypropylene are combined to form the unique toughening additive under the surface modification actions of a coupling agent and a compatilizer; and when the toughening additive is used for preparing the cement mortar, the prepared cement mortar has the advantages of favorable toughness, favorable fatigue resistance and favorable isotropy, and is beneficial to enhancing the crack resistance of the grouting mortar and reducing the engineering maintenance cost in the later period.

The invention provides a battery electrode, a preparation method thereof, and a battery. The battery electrode comprises a current collector and an active substance layer coated on the current collector; a micro-nano particle layer is adhered to the surface of the active substance layer; the active substance layer comprises electrode active substance and electrode binder; the micro-nano particle layer comprises micro-nano dry powder particles; and the micro-nano dry powder particles comprise dry powder particles of the micro-nano electrode active substance. Interface impedance between the electrode and electrolyte is reduced and rate discharge performance of the battery is improved; a micro-nano active material reduces serious volume effect of the material; and specifically, the micro-nano particle layer may not comprise the binder preferably, so that the large-current discharge characteristic of the battery is improved further. The method is simple and is easy to implement; and the combinability between the micro-nano particle layer and the active substance layer is high, and the surface of the active substance layer is not polluted by the substances of an upper layer.