8 results about "Carbon black nanoparticles" patented technology

This application discloses a light-resistant and scratch-resistant gravure inkjet printing ink and its preparation method, belonging to the field of novel ink technology. The light-resistant and scratch-resistant gravure inkjet printing ink comprises the following raw materials in parts by weight: 38-45 parts of fluorosilicone modified polyacrylate emulsion, 7-11 parts of modified composite powder, 6-9 parts of nano carbon black, 1.2-1.8 parts of dispersant, 0.6-1.2 parts of leveling agent, 0.3-0.6 parts of defoamer, 1.5-2 parts of abrasion-resistant agent, 0.4-0.8 parts of AMP-95, and 25-35 parts of deionized water. This application limits the composition and weight of the inkjet ink, and uses fluorosilicone modified polyacrylate emulsion as the film-forming main body to endow the ink with low surface energy, high water resistance and excellent adhesion to film substrates; combined with modified composite powder, it effectively improves the dispersibility of nanoparticles, avoids agglomeration and clogging, and significantly improves the sun resistance and anti-aging performance. Overall, it takes into account high sun resistance, high scratch resistance, strong adhesion, environmental protection and low VOC, and is highly suitable for high-speed gravure inline inkjet printing scenarios.

The invention discloses low-frequency electromagnetic shielding concrete and a preparation method thereof, and belongs to the technical field of electromagnetic shielding concrete preparation. The low-frequency electromagnetic shielding concrete is prepared from a wet material and a dry material, wherein the wet material is prepared from water, a nano carbon black dispersing agent and a defoaming agent; the dry material is prepared from the following components: cement, an admixture, nano carbon black, steel fibers, magnetic aggregate and a water reducing agent; the mass ratio of the water to the cement is 0.4 to 0.68. A multi-scale and multi-dimensional developed electric conduction and magnetic conduction network is built in a three-dimensional space in the concrete, a tiny electromagnetic leakage area in the concrete is made up from different scales, the situation that an electric conduction and magnetic conduction path is disconnected in the electromagnetic concrete is avoided, effective shielding protection can be formed for 14 kHz-950 MHz low-frequency-band electromagnetic waves, and the electromagnetic shielding effect is good. And low-frequency electromagnetic wave shielding effectiveness-mechanical bearing capacity integrated construction in special engineering can be realized.

The application discloses a production method of a BOPP matte type electrostatic adsorption film, and the electrostatic adsorption film comprises a matte treatment layer, an electrostatic adsorption layer, a BOPP base layer, an anti-fingerprint layer and a self-repairing layer; the matte treatment layer is composed of polymethyl methacrylate, silica matt, polystyrene, acrylic ester copolymer, antistatic agent, ultraviolet absorber and lubricant; the electrostatic adsorption layer is composed of PA6, polyvinyl alcohol, carbon black nanoparticles, polyaniline, surfactant and coupling agent; and the BOPP base layer is composed of isotactic polypropylene, atactic polypropylene, acrylonitrile-butadiene-styrene copolymer, nano titanium dioxide, maleic anhydride grafted polypropylene and ethylene-octene copolymer. The BOPP film with good matte effect and electrostatic adsorption can be prepared.

The invention discloses shielding concrete capable of pumping electromagnetic waves of 20 m or above and a preparation method of the shielding concrete, and belongs to the technical field of electromagnetic shielding concrete preparation. The electromagnetic wave shielding concrete capable of being pumped by 20 m or above is composed of water and a dry material, the dry material is composed of, by mass, 20%-30% of cement, 2%-6% of an admixture, 0.4%-1% of nano carbon black, 3%-10% of steel fibers, 55%-70% of magnetic aggregate and 1%-1.6% of a water reducing agent, and the mass ratio of the water to the cement is 0.45-0.72. The electromagnetic shielding material can form wide-frequency-band electromagnetic shielding for electromagnetic waves with the frequency band of 1-18 GHz, the high-frequency shielding effect is greatly improved, the mechanical property reaches C60 strength, the pumping requirement of site construction is met, the pumping height can reach 20 m or above, and the application requirement of special protective engineering is met.

The invention discloses high-performance electromagnetic shielding concrete and an electromagnetic shielding chamber construction method, and belongs to the technical field of cement-based composite shielding material preparation. The high-performance shielding concrete is prepared from the following components in percentage by mass: 0.2%-1% of nano carbon black, 30%-50% of magnetic iron ore, 10%-30% of iron ore concentrate sand, 10%-25% of cement, 2%-10% of steel fiber, 0.2%-0.5% of a water reducing agent, 0.1%-0.5% of a dispersing agent and 4%-15% of water. According to the invention, the high-conductivity nano carbon black, the high-magnetism nickel-containing steel fiber and the conductive and magnetic continuous grading aggregate are utilized to construct a graded conductive and magnetic enhanced network structure, so that the electromagnetic field shielding and mechanical strength of the concrete material are synergistically improved; the shielding interface board is utilized to ensure tight connection between the electromagnetic shielding concrete and the component, and the shielding effectiveness is improved.

This invention discloses a synergistic dual-modified nano-carbon black of PEI and 1-carboxymethyl-3-methylimidazolium, its preparation method, and its application. The preparation method of the modified nano-carbon black includes the following steps: reacting oxidized nano-carbon black, PEI, and 1-carboxymethyl-3-methylimidazolium compounds in a solvent at a mass ratio of 10:(5~20):(2~10) at 60~120℃ for 5~8 h to obtain nano-carbon black synergistically modified by PEI and 1-carboxymethyl-3-methylimidazolium compounds. This invention, through the dual modification of PEI and ionic liquids, constructs a multilayer structure rich in amino and ionic liquid groups on the surface of nano-carbon black, greatly enhancing its interaction with the polar groups of polymers and solving the problem of easy agglomeration of nano-carbon black in polymers.

This invention relates to the field of polymer composite materials, and discloses a high-toughness, high-light-shielding polycarbonate composite material and its preparation method, solving the technical problem that existing polycarbonate materials cannot simultaneously achieve high light-shielding properties and high impact toughness. By constructing a polyurethane elastic composite coating containing nano-carbon black in situ on the surface of continuous glass fibers, the coating acts as a microscopic light-shielding network and an interfacial stress buffer layer. This not only effectively blocks light transmission and imparts high optical density to the material, but also passivates crack tips and absorbs impact energy. As a result, the composite material maintains high rigidity while possessing excellent notched impact toughness and a high-gloss black appearance without loose fibers.

This invention discloses a ball milling method for preparing long afterglow materials using carbon-containing waste liquid. The method includes: mixing a carbon-containing waste liquid with a matrix material to obtain a mixture, wherein the carbon-containing waste liquid includes small-sized carbon, which is at least one of carbon nanotube fragments, graphene fragments, and nano-carbon black fragments; the matrix material is boric acid or borate crystals. The method for obtaining the carbon-containing waste liquid includes: adjusting the pH of the carbon-containing waste liquid to 5-6, centrifuging, and collecting the supernatant; ball milling the mixture, and drying to obtain the long afterglow material. The long afterglow material contains 0.1-2 wt% small-sized carbon, the ball milling time is at least 4 hours, and the ball mill rotation speed is 300-800 r / min. This invention is the first to propose the direct preparation of long afterglow materials using carbon-containing waste liquid as raw material, realizing the high-value resource utilization of carbon-containing waste liquid.