31results about How to "Thin lamellar" patented technology

The invention provides a kind of conductive powder coating, each component is calculated by weight, comprises:

The invention discloses a preparation method and application of a stratiform bimetallic oxide sorbent capable of effectively removing low-concentrated phosphate radical. According to the invention, a hydrophobic ionic liquid BmimPF6 is taken as oil phase, and N,N-dimethyl formamide (DMF) is taken as a cosolvent in a Bmim PF6 / DMF / H2O ionic liquid-in-water inverse surfactant-free microemulsion system, a small particle diameter ultrathin stratiform bimetallic hydroxide nanosheets precursor is prepared according to a double microemulsion coprecipitation method, calcination of the precursor is carried out at high temperature of 500 DEG C so as to prepare stratiform bimetallic oxides adsorbent. The obtained stratiform bimetallic oxides are 107.36-158.46 cm<2> / g in specific surface area, 8.56-11.17 nm in pore diameter, and 0.358-0.468 cm<3> / g in pore volume. The stratiform bimetallic oxides can restore and form stratiform bimetallic hydroxide nanosheets in an aqueous medium, wherein the particle diameter of nanosheets is 150-200 nm, the thickness is about 5 nm, and the distribution of particle diameters is uniform. The adsorption rate of the stratiform bimetallic oxides is far higher than that of large-grained hydrotalcite prepared from the precursor stratiform bimetallic oxides of the sorbent according to the traditional coprecipitation method.

The invention provides a porous graphene material, a preparation method thereof, a capacitor electrode, a capacitor and an electric device, and relates to the technical field of graphene. The preparation method of the porous graphene material uses potassium carbonate as an activator and a template, uses coal tar as a carbon source, mixes coal tar and potassium carbonate, and prepares a porous graphene material by calcining. The preparation method is environmentally friendly. , Simple, high yield, low equipment requirements, etc., the prepared porous graphene material has the characteristics of controllable specific surface area, well-developed pores, and thin sheets. The porous graphene material provided by the present invention is prepared by the above-mentioned preparation method. The structural characteristics of the porous graphene material make it possible to shorten the ion diffusion distance, facilitate the transmission of charges, and expose more adsorption sites. point, which is conducive to the further application of porous graphene materials. The present invention also provides a capacitor electrode, which is made of the above-mentioned porous graphene material.

The invention relates to the technical field of preparation of nanophase materials, and in particular relates to a preparation method of graphene powder. The preparation method comprises the following steps: (1) preparing a graphene oxide solution; (2) adding organic small molecules to the graphene oxide solution, stirring and drying to obtain graphite oxide containing the organic small molecules; and (3) carrying out heat reduction treatment on the dried graphite oxide containing the organic small molecules to obtain graphene powder. The graphene powder prepared by the method provided by the invention has the characteristics of high degree of peeling, thin sheets, few structural defects, good degree of order and excellent electric conductivity, and has great application prospects in the fields of lithium-ion batteries, supercapacitors and the like.

The invention provides a nickel ferrite nanosheet as well as a preparation method and application thereof. The preparation method comprises the following steps: S1, adding ferric salt and nickel saltto water, uniformly mixing; S2, adding a precipitator to solution obtained in the step S1, uniformly mixing; S3, performing hydrothermal reaction on solution obtained in the step S2, purifying a product to obtain a nickel ferrite precursor; and S4, performing high temperature thermal treatment on the nickel ferrite precursor obtained in the step S3 to obtain the nickel ferrite nanosheet. The provided preparation method is safe and stable, pollution-free, easy to obtain raw materials, easy to operate, simple in equipment, and higher in yield, and the prepared nickel ferrite nanosheet is largerin dimension, a sheet layer is thinner, and the appearance is integrated, so the nickel ferrite nanosheet has an extensive application prospect in electromagnetic materials, catalysts and catalyst carriers.

The invention relates to a graphene oxide / manganese tungstate / polyethylene glycol nanometer hybrid material and a preparation method thereof. The preparation method comprises the following concrete steps: separately preparing an alcoholic solution of a divalent manganese salt and an alcoholic solution of nanometer graphene oxide and then carrying out mixing under stirring so as to prepare a mixed solution; preparing an aqueous tungstate solution; and slowly adding the aqueous tungstate solution into the mixed solution, then adding aminocaproic acid, carrying out stirring and heating, then adding polyethylene glycol again, carrying out a continuous reaction for 3 to 5 h, then successively carrying out natural cooling to room temperature, centrifugation and washing, dispersing a solid product in deionized water and carrying out ultrasonic treatment so as to obtain the nanometer hybrid material. Compared with the prior art, the preparation method provided by the invention uses easily available raw materials and is simple in process and good in economic performance and practicality; and the prepared graphene oxide / manganese tungstate / polyethylene glycol nanometer hybrid material is in a two-dimensional thin laminar shape, has excellent dispersibility and biocompatibility, outstanding photo-thermal effect and obvious imaging effect and can be used for MRI imaging, PA imaging, CT imaging or photo-thermal treatment.

The invention belongs to the technical field of nanometer materials, relates to a graphene material, and particularly relates to a preparation method of a large sheet diameter graphene and the large sheet diameter graphene. The provided preparation method of the large sheet diameter graphene takes graphite as the raw material and high-viscosity syrup as a peeling auxiliary, the large sheet diameter graphene is prepared by means of mechanical peeling; wherein the viscosity range of the syrup is 5*10<4> to 1.5*10<6> centipoise. Meanwhile, the syrup is regenerated and recycled through the simplereduced pressure distillation after the separation, the process is simple, the condition is mild, the cost is low, the preparation method is efficient and environmentally friendly, and the prepared graphene material has the advantages of large sheet diameter and high electrical conductivity.

The invention relates to an epoxy resin / montmorillonite nanocomposite coating for metal surfaces and a method for preparing a composite film by using the nanocomposite coating. In the present invention, lithium chloride is used to peel off the montmorillonite sheets, and hexadecylamine is used to organically modify the peeled montmorillonite, so that the hydrophilic montmorillonite is transformed into lipophilic, and the interlayer distance of the montmorillonite is expanded. , the interlayer force becomes weaker, so that the montmorillonite can be more uniformly dispersed in the polymer. The preparation method of the epoxy resin / montmorillonite nanocomposite membrane material is simple, does not require complex equipment, and has huge reserves of sodium montmorillonite, which is suitable for industrial production.