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113results about How to "Conductive stability" patented technology

Strippable semiconductive shielding rubber for rubber insulation and preparation method thereof

ActiveCN103122085AHighly cleanAvoid performance biasPower cables with screens/conductive layersPlasticizerResidual carbon
The invention relates to a strippable semiconductive shielding rubber for rubber insulation and a preparation method thereof. The strippable semiconductive shielding rubber comprises the following components in parts by weight: 100 parts of nitrile-butadiene rubber, 0.5-8 parts of graphene, 10-40 parts of conductive carbon black, 7-15 parts of plasticizer, 1-2 parts of anti-aging agent and 2.5-4.5 parts of vulcanizing agent, wherein the nitrile-butadiene rubber is a solar one; the minimum surface-diameter ratio of the graphene is 1000; the plasticizer is one or a mixture of paraffin, dioctyl ester, stearic acid and the like; and the vulcanizing agent is a peroxide vulcanizing system. The preparation method comprises the following steps: plasticating the nitrile-butadiene rubber twice (10 minutes for each time), and standing at normal temperature for 12 hours; adding the graphene into the plasticated nitrile-butadiene rubber, evenly mixing, and adding 1/2 of the conductive carbon black or acetylene carbon black; 3 minutes later, adding the residual carbon black and the plasticizer, and compounding for 2 minutes; sequentially adding various assistants, finally adding the vulcanizing agent, compounding for 1 minute, and then discharging, wherein the compounding temperature is not higher than 120 DEG C; and after discharging, tabletting semiconductive shielding gum on a tabletting machine to prepare the semiconductive shielding rubber. The semiconductive shielding rubber provided by the invention is easy to process and strip and high in conductivity.
Owner:SHANGHAI LEVSON ENTERPRISE GRP

Graphene composite conductive coating as well as preparation method and application thereof

The invention belongs to the technical field of conductive coatings, and discloses a graphene composite conductive coating as well as a preparation method and application thereof. The coating is composed of the following materials: 5-80% of resin, 0.1-5% of graphene, 2.5-20% of copper powder, 7.2-30% of silver powder, 0.55%-3.0% of a dispersant, 17-40% of an organic solvent, 0.3-1% of an anti-settling agent, 0.3-1% of a levelling agent and 0.1-1% of a cross-linking agent; and the preparation method comprises the following steps: adding the graphene into a slowly-drying solvent, adding the dispersant, performing stirring, and performing ultrasonication; adding the ultra-fine copper powder into a slowly-drying solvent, adding the dispersant, performing stirring, and performing ultrasonication; adding the ultra-fine silver powder into a slowly-drying solvent, adding the dispersant, performing stirring, and performing ultrasonication; and adding the dispersant into acrylate polyurethane, adding the treated solutions into the acrylate polyurethane in sequence, adding the organic solvent, the anti-settling agent, the levelling agent and the cross-linking agent, performing stirring, and performing grinding. The coating provided by the invention meets the requirements of conductive performance, avoids the single use of silver, reduces costs, and has a high price/performance ratio.
Owner:EVERPOWER SHENG TIE (XIAMEN) GRAPHENE TECH CO LTD

Automatically-produced light-emitting diode (LED) lamp tube

The invention provides an automatically-produced light-emitting diode (LED) lamp tube which comprises a lamp tube body, lamp bases at two ends of the lamp tube body, a luminous bead circuit board and a power circuit board. The luminous bead circuit board and the power circuit board are arranged in the lamp tube body. An upper plug-in groove and a lower plug-in groove are arranged in a substrate in an upper-lower layered mode in the axial direction. The luminous bead circuit board and the power circuit board are respectively arranged in the upper plug-in groove and the lower plug-in groove in an inserted and layered mode. Electrical input connecting pieces are arranged at one end of the power circuit board, and electrical output connecting pieces are arranged at the other end of the power circuit board. Electrode connecting pieces are arranged at the inner end of one lamp base and are connected with the electrical input connecting pieces in a plug-in mode. Conductive screws are arranged on the board surface of the luminous bead circuit board and are electrically connected with the electrical output connecting pieces. The automatically-produced LED lamp tube is simplified in connecting wire distribution, achieves technical effects of stable electricity conduction, and is suitable for automated production of LED ball lamps.
Owner:OUTRACE TECH

Bacterial cellulose/manganese dioxide/polypyrrole composite film and preparation method thereof

The invention discloses a bacterial cellulose / manganese dioxide / polypyrrole composite film and a preparation method thereof. The composite film is prepared by soaking bacterial cellulose in alkali, performing impurity removal and pretreatment, adding potassium permanganate and pyrrole, performing oxidization and reduction to obtain manganese dioxide and polypyrrole, and finally performing suction filtration. According to the bacterial cellulose / manganese dioxide / polypyrrole composite film, polypyrrole which is high in air stability, can be easily prepared into a film in an electrochemical way and is low in poison is utilized, and manganese dioxide which shows high capacitive property in neutral aqueous electrolyte under a wider potential window, and high-strength material bacterial cellulose are compounded, so that the method is simple and feasible. Polypyrrol is loaded on bacterial cellulose, so that the conductivity of the film is improved; meanwhile, manganese dioxide has high capacitive property, so that the electrical property of the composite film is further improved. The bacterial cellulose / manganese dioxide / polypyrrole composite film can be applied to the fields of lithium ion battery cathode materials, supercapacitors, electronic devices and biological sensor wrapping materials.
Owner:NANJING UNIV OF SCI & TECH
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