135 results about "Carbon black nanoparticles" patented technology

The invention provides an ultrahigh molecular weight polyethylene/ carbon black nanometer composite fiber and its preparation method. The method comprises: putting ultrahigh molecular weight polyethylene, carbon black nanoparticles and an anti-oxidant into a solvent, conducting high speed shearing and stirring by an emulsifying machine so as to be uniformly mixed, thus obtaining a mixture; then raising the temperature of the mixture to 100-120DEG C, controlling the temperature raising speed at 2-5DEG C/min, and carrying out thermal insulation for 1-4h so as to obtain a spinning solution, then employing a conventional ultrahigh molecular weight polyethylene fiber production method for preparing an ultrahigh molecular weight polyethylene/carbon black nanometer composite fiber. The ultrahigh molecular weight polyethylene/carbon black nanometer composite fiber prepared in the invention effectively improves the hear resistance and creep resistance of ultrahigh molecular weight polyethylene fibers, reduces fiber production cost, and extends the application scope of fibers. Meanwhile, the preparation method provided in the invention has concise process route and is easy to operate.

The invention relates to an iron and nitrogen co-doped carbon oxygen reduction catalyst. The preparation method comprises steps: a carbon carrier is dissolved in an organic solvent, ultrasonic dispersion for being uniform is carried out, soluble iron salt is added under a stirring condition, and after uniform mixing, a mixed solution is obtained; the mixed solution is transferred to a reaction kettle, a reaction is carried out under the stirring condition, the reaction solution after the reaction is subjected to solid-liquid separation, washing and drying to obtain a solid material, the solidmaterial and a nitrogen source are mixed and grinded, and a pyrolysis precursor is obtained; and the pyrolysis precursor is roasted in an inert atmosphere to obtain the iron and nitrogen co-doped carbon oxygen reduction catalyst, wherein the carbon carrier is Ketjen black nano carbon black particles. Compared with the prior art, the method has the advantages of high oxidation reduction catalytic activity, good electrochemical stability, simple and controllable preparation method, short period, rich raw material reserves, low cost, capability of realizing large-scale production and the like.

The invention discloses a morphology-controllable and color angle-independent photonic crystal particle and its preparation method. The preparation method comprises the following steps: mixing Fe3O4 nanoparticles, carbon black nanoparticles, graphene nanoparticles or a mixture of the Fe3O4 nanoparticles, carbon black nanoparticles and graphene nanoparticles with an emulsion containing monodisperse colloidal microspheres; printing a mixture obtained onto a superhydrophobic substrate by a spraying, dispensing or inkjet mode so as to form emulsion droplets with diameter being 11microns -1.6 mm; and drying to obtain the ellipsoidal color angle-independent colored photonic crystal particle with its length-diameter ratio being controllable. The photonic crystal particle is colourfast and environmentally friendly and has a wide application prospect in fields of pigment, display, sensing and the like.

The invention relates to a modified carbon raw material for a carbon-containing refractory material and a preparation method thereof. The preparation method comprises the following steps: adding 5-30 wt% of a mixture of simple substance silicon powder and silicon dioxide micropowder into flake graphite fine powder or nano carbon black or multiwall carbon nanotubes; evenly stirring to obtain mixedpowder; and then, treating the mixed powder in a carbon-buried atmosphere at 800-1400 DEG C for 1-3 hours, wherein the molar ratio of the simple substance silicon powder to the silicon dioxide micropowder is (0.5-3):1. The invention has simple technique, and ceramic coatings with different thicknesses can be formed on the surface of the carbon raw material by regulating the molar ratio of the simple substance silicon powder to the silicon dioxide micropowder and regulating the percentage of the simple substance silicon powder and silicon dioxide micropowder in the carbon raw material. The oxidation resistance of the modified carbon raw material is greatly enhanced; and when being added into the carbon-containing refractory material, the modified carbon raw material can enhance the oxidation resistance of the carbon-containing refractory material, and simultaneously, the ceramic coating on the surface prevents the modified carbon raw material from reacting with the antioxidant in the carbon-containing refractory material, thereby enhancing the comprehensive properties of the carbon-containing refractory material.

The invention provides a matte TPO skin material with low processing viscosity as well as a preparation method and application of the TPO skin material. The TPO skin material is formed by filling a thermoplastic polyolefin (TPO) with nanoparticles, wherein the mass ratio of the TPO to the nanoparticles is (90-99.5):(0.5-10); and the nanoparticles include one or more selected from the group consisting of multi-layer graphene, carbon nanotubes, monodisperse polystyrene microspheres, manganese oxide nanowires, iron tetroxide nanoparticles, fumed silica, and nano carbon black particles. The nanoparticles are packed in the TPO, so that the free volume of the polymer is increased, and the density of entanglement points is reduced; at the same time, interface slip occurs between the nanoparticlesand the polymer, the interface slip acts as a lubricant to reduce the viscosity of the system, so that the process temperature of operation such as mixing, calendaring and extrusion in the material processing process is reduced; the nanoparticles play a matting effect; the added nanoparticles have little effect on the mechanical properties of the material and improves the friction-resistant coefficient; and the TPO skin material provides guidance for industrial production.

The invention discloses a preparation method of oily self-dispersing nano carbon black and belongs to the field of fine chemical industry. A silane coupling agent containing carbon-carbon double bonds is grafted on the surface of carbon black, polymerizable groups of the silane coupling agent are utilized to copolymerize with other oily monomers, the surfaces of carbon black particles are coated with a layer of polymer having both dispersing and stabilizing effects, and then the objective of self-dispersing in oily solvents is achieved.

The invention relates to a decorating interior sound insulation material, which is prepared from the following raw materials in parts by weight: 42-56 parts of thermoplastic phenol resin, 20-25 parts of expanded vermiculite, 4-6 parts of polystyrene foamed plastic, 2-3 parts of a silane coupling agent, 1-1.5 parts of nano carbon black, 8-10 parts of polymethyl methacrylate, 0.1-0.2 part of an antioxidant, 0.1-0.2 part of a foaming agent, 0.2-0.3 part of magnesite, 2-3 parts of silica sol with the solid content of 10%-15%, 20-40 parts of 100-200-mesh montmorillonoid, 10-12 parts of a water-based polyurethane emulsion with the solid content of 8%-10%, 10-20 parts of collagenous fiber, 20-30 parts of waste felt and 2-5 parts of an assistant. The prepared expanded vermiculite-polyurethane composite emulsion-wrapped thermoplastic phenol resin nonwoven sound insulation material is light in weight, small in thickness and good in sound insulation effect, and has a good market prospect.

The invention discloses a bio-based water-based anticorrosive force-sensitive conductive coating for bridge building protection and health monitoring, which comprises a bio-based resin, an assistant,deionized water, a cosolvent, a pigment and a conductive filler, and the conductive filler comprises nano carbon black, carbon nanotubes, Mxene, silver nanowires or nickel nanowires. Bio-based resin is used as a main film forming matter, so that the production of the product is environmentally friendly and in line with sustainable development. The conductive filler is added, so that the prepared bio-based water-based anti-corrosion force-sensitive conductive coating not only has corrosion resistance, but also has conductivity and sensitive sensitivity, thereby being used for stress detection or bridge deformation detection.

The invention provides a graphene/white carbon black composite material. The graphene/white carbon black composite material comprises a graphene material and white carbon black, wherein the white carbon black is grafted on lamellas of the graphene material through chemical bonds. The graphene/silane coupling agent/white carbon black composite material with a novel structure is obtained by bondingthe graphene material and the white carbon black through chemical bonds. In the composite material provided by the invention, the graphene material and the white carbon black are interspersed, mutualagglomeration can be inhibited, and white carbon black nanoparticles are uniformly compounded and grafted on the surfaces of the lamellas of the graphene material, so the graphene material can keep abasic lamellar structure and maintains good single-layer dispersity in the composite material, and the material is a nano-scale highly-dispersed material. Meanwhile, the white carbon black on the surface of the graphene can improve the rigidity of the graphene lamellas, prevent the graphene from curling and folding due to high-temperature shearing in a rubber mixing process and improve the dispersity of the graphene in a rubber matrix.

The invention discloses a vegetable oil-based polyurethane coated fertilizer and a preparation method thereof. The vegetable oil-based polyurethane coated fertilizer comprises fertilizer particles anda vegetable oil-based polyurethane coating, wherein the modified vegetable oil-based polyurethane coating comprises an inner layer coating, a middle layer coating and an outer layer coating which aresequentially coated from inside to outside; the inner layer coating and the outer layer coating are prepared from a vegetable oil-based polyurethane coating solution, and the middle layer coating isprepared from a vegetable oil-based polyurethane coating solution and nano carbon black. According to the fertilizer and the preparation method disclosed in the invention, nano carbon black which is low in surface energy, low in price and easy to obtain is doped into a plant oil-based polyurethane coating to construct a micro-nano super-hydrophobic coating, so that the plant oil-based polyurethanecontrolled-release fertilizer with an ultralow coating rate is prepared, and the nutrient content of the controlled-release fertilizer per unit mass is increased; the purposes of prolonging the controlled release effect of the coated fertilizer and reducing the dosage of the coating material can be achieved, the cost is relatively low, and the environment-friendly effect is achieved.

The invention relates to a polyimide composite material and a preparation method and application thereof. The polyimide composite material comprises a polyimide matrix and a carbon fluoride material distributed in the polyimide matrix; the carbon fluoride material comprises any one or a combination of at least two of graphene fluoride with the plane size smaller than or equal to 10 [mu]m, fluorinated nano carbon black with the diameter smaller than or equal to 100 nm or fluorinated graphene quantum dots with the diameter smaller than or equal to 10 nm. The three carbon fluoride materials withspecific sizes are introduced into the polyimide matrix, so that the comprehensive performance of the polyimide can be effectively improved, and the polyimide has low dielectric constant, high light transmittance, low water absorption rate, high heat resistance and excellent mechanical properties.

The invention discloses a preparation method of modified white carbon black with chemical isolating structures and relates to application of a chemical isolating method to modifying white carbon black. By means of the characteristic that a saline coupling agent can be grafted to white carbon black and organic functional groups in the saline coupling agent can be reacted with special functional groups, modified white carbon black, the nanoparticles of the white carbon black of which are isolated by organic chain sections is prepared. The modified white carbon black can be uniformly dispersed stably in form of nanoparticles in a polymer substrate if being used as filler. The modification method is characterized in that by means of various methods, (I) or (II) structures are established among the nanoparticles of the white carbon black; and the nanoparticles of the white carbon black are isolated by means of the structure. The method can be directly realized by modifying the white carbon black by means of the coupling agent of the (I) or (II) structures; or can be indirectly realized by modifying the white carbon black by means of the coupling agent of the (III) structure and is then further reacted with the white carbon black modified by the saline coupling agent of an (IV) structure or a compound of an (V) structure. The formulae are as shown in the specification.