38results about How to "Improve conductivity uniformity" patented technology

A preparation method for a flexible graphene-modified knittable carbon nanofiber belongs to the technical field of chemical industry. The preparation method comprises the following steps: at first, graphene oxide is taken to be placed in a container filled with DMF (Dimethyl Formamide) to obtain a graphene oxide saturated solution with the brown-yellow upper layer, then, polyacrylonitrile macromolecules are dissolved in the DMF to obtain a transparent macromolecular solution, the graphene oxide saturated solution and the macromolecular solution are mixed to obtain a precursor solution, a grapheme-modified polyacrylonitrile fiber is obtained through the electrostatic spinning technology or the melt spinning technology, the drying and stabilizing are performed, and at last, the carbon nanofiber is prepared from the dried polyacrylonitrile fiber in the inert gas environment or the vacuum condition. The carbon nanofiber prepared by the method can be applicable to lithium ion batteries or electrochemical capacitors, and besides, is also applicable to the fields of the war industry and the aerospace.

The invention discloses a conductive silver adhesive with low solid content and capable of being rapidly cured at medium and normal temperature. The conductive silver adhesive is prepared from 1%-2% of silver nanowires, 13%-29% of flake silver powder, 20%-30% of bisphenol A epoxy resin, 5%-10% of rapid medium and normal temperature curing agents, 0.5%-1% of rapid medium and normal temperature curing accelerant, 1%-3% of thinning agents, 1%-3% of K-570 or K-550, 0.5%-1% of terephthalic acid, 20%-56.3% of cellulose, 0.5%-1% of nano-silicon dioxide, 0.1%-0.5% of antifoaming agents and 0.1%-0.5% of ICAM8401 or ICAM8402. The conductive silver adhesive can be rapidly cured at medium and normal temperature and is low in silver content and low in cost, and therefore the application range of the conductive silver adhesive is greatly extended.

The invention discloses a flexible transparent conductive film and a preparation method thereof. The preparation method comprises the steps of adding silver nanowires into absolute ethyl alcohol, dispersing uniformly under ultrasonic assistance, applying the dispersion liquid to the surface of an organic filter membrane by means of vacuum filtration, then drying the filter membrane to obtain a filter membrane A with uniformly dispersed silver nanowires; (2) uniformly mixing liquid silicone rubber and a corresponding cross-linking agent, then uniformly dispersing the mixture on the surface of ametal film by means of spin coating, and then carrying out solidification to obtain a film B; (3) tightly fitting the side having the silver nanowires of the filter membrane A and the side having thesolidified silicone rubber of the film B, carrying out pressure treatment, and transferring the silver nanowires on the filter membrane to the surface of the silicone rubber film; and (4) soaking thesample obtained in the step (3) into a dilute acid solution, and enabling the metal film on the surface of the silicone rubber film to be completely dissolved so as to obtain the flexible transparentconductive film. The ultra-thin flexible transparent conductive film prepared according to the invention has uniform conductivity and good flexibility.

The invention belongs to the technical field of conductive inks and particularly relates to a carbon fiber/gaseous carbon tube/carbon black compound conductive ink and a preparation method thereof. The carbon fiber/gaseous carbon tube/carbon black compound conductive ink is composed of, by weight part, 0.1-10 parts of carbon fiber/gaseous carbon tube compound powder, 0.1-20 parts of carbon black,0.1-70 parts of resin adhesives, 0.1-5 parts of dispersant, 0.1-5 parts of flatting agent, 0.1-5 parts of anti-settling agent and 0.1-5 parts of water-repellent agent. The carbon fiber/gaseous carbontube/carbon black compound conductive ink has the advantages of being high in adhesion force, electric conductivity, water resistance, alcohol resistance and the like and achieves uniform conductive uniformity and application attenuation resistance; meanwhile, the carbon fiber/gaseous carbon tube/carbon black compound conductive ink can be applied widely as heating carbon paste, conductive carbonpaste and electromagnetic shielding carbon paste to heating floors, PCB (printed circuit board) carbon oil, electromagnetic shielding coatings and the like.

The invention belongs to the technical field of the underfloor heating slurry, and specifically relates to a composite graphene underfloor heating slurry and a preparation method thereof. The composite graphene underfloor heating slurry is prepared from the following raw materials in parts by weight: 0.1-30 parts of carbon fiber/graphene/carbon microsphere powder, 0.1-70 parts of a matrix bindingmaterial, 0.1-5 parts of a dispersing agent, 0.1-5 parts of a flatting agent, 0.1-5 parts of a precipitator, and 0.1-1 part of a defoaming agent. The composite graphene underfloor heating slurry prepared by adopting the carbon fiber/graphene/carbon microsphere powder has characteristics of good adhesive force, high conductivity, water resistance and alcohol resistance, and has excellent conductiveuniformity, and attenuation resistance.

The invention discloses conductive microfiber leather as well as a preparation method and equipment thereof. The preparation method of the conductive microfiber leather comprises the following steps:1) activating a microfiber staple fiber; 2) impregnating graphene oxide; 3) preparing sulfur-graphene/microfiber staple fiber; 4) impregnating a faintly alkaline strong reducing agent; 5) desulfurating and reducing; 6) washing; 7) preparing a non-woven fabric; 8) preparing the microfiber leather. In addition to the conventional production line for preparing the microfiber leather through the microfiber staple fiber, the equipment further comprises an opener and a microfiber staple fiber processing tank, the microfiber staple fiber processing tank takes the shape of a funnel bucket, a porous filter plate is arranged at the bottom of a funnel, and a cake shaped extruding machine is arranged at the top of the funnel. The graphene is bounded with the microfiber staple fiber through the chemical bond, the binding force is firm, the graphene is more evenly distributed on the surface of the microfiber staple fiber, the electrical conductivity of the synthesized conductive microfiber leather is better, and the tinting strength of the synthesized conductive microfiber leather is strong.

The invention discloses an antistatic polytetrafluoroethylene film which comprises the following components in percentage by mass: 75-95% of polytetrafluoroethylene dispersion resin, 5%-20% of nano metal electric-conductive powder, 1%-5% of nano graphite. The invention discloses a preparation method of the polytetrafluoroethylene film. In the antistatic polytetrafluoroethylene film, the nano aluminum powder is coated with the nano graphite, so that the lubricity of the conductive powder is improved; and then the conductive nano powder is clamped between the two layers of films in a sandwich layer form, so that the fiber-node form of the polytetrafluoroethylene film is not influenced. The polytetrafluoroethylene film is good in flux and large in porosity.

The invention relates to an aluminum electrolytic technology, more specifically relates to a preheating and roasting method for an aluminum electrolytic tank, especially provides a method for roasting the aluminum electrolytic tank with a special-shaped cathode structure. The invention solves the technical problem that the aluminum electrolytic tank with special-shaped cathode structure can be roasted by reducing the amount of a carbon material. The roasting method comprises the following steps: A, filling a basic material in a special-shaped cathode groove, wherein the basic material can not contact with anode; B, laying the carbon material on a convex plate of the special-shaped cathode, wherein the carbon material is contact with anode; C, electrifying and roasting; wherein the basic material is an electrolyte block or/and cryolite. One of the electrolyte block and cryolite can be selected, or a mixture of the electrolyte block and cryolite can be used; any proportion can be employed for mixing. The roasting method of the invention can reduce the carbon material amount, the workload for fishing, and the phenomena of overburn and chipping. The method of the invention provides an effective method for roasting the aluminum electrolytic tank.

The invention discloses a tubular PERC two-sided solar cell. The tubular PERC two-sided solar cell comprises back silver main girds, back aluminum gate lines, reverse composite film, P-type silica, N-type emitting electrodes, front passive film and positive electrodes, wherein the positive electrodes are prepared through electroplating equipment, the front of the cell faces downwards and is in contact with electroplating liquid of an electroplating tank, and LED lamps irradiate the back of the tubular PERC two-sided solar cell. The electroplating tank is internally provided with an anode plateand an electric brush, a positive electrode of a power supply is connected with the anode plate, a negative electrode of the power supply is connected with the electric brush, and the electric brushis connected with the back silver main gird at the back of the tubular PERC two-sided solar cell. Accordingly, the invention further discloses a preparing method of the tubular PERC two-sided solar cell and the electroplating equipment special for the tubular PERC two-sided solar cell. By means of the tubular PERC two-sided solar cell, the preparing method thereof and the electroplating equipmentspecial for the tubular PERC two-sided solar cell, the conducting uniformity of the electrodes at the back of the cell is improved, the uniformity of the electroplating electrodes at the front of thecell is improved, and the good appearance of the cell is maintained.

A method for manufacturing a display panel, a display panel and a display device are provided. The method for manufacturing a display panel includes: mixing a liquid crystal material and a spacer preparation material, and injecting them between an array substrate and a color filter substrate which are assembled; performing a UV irradiation on the assembled array substrate and the color film substrate with ultraviolet rays by using a mask plate to polymerize the spacer preparation material to form spacers, the spacers connecting the array substrate and the color film substrate.

The invention discloses a carbon-based conductive ink filler and a preparation method thereof. The carbon-based conductive ink filler comprises the following components by mass percentage: 40-50% of epoxy resin, 20-30% of graphene, 10-20% of conductive carbon black, 2-5% of a hyperdispersant and 8-15% of a mixed solvent, and the total mass percentage is 100%. According to the invention, graphene and conductive carbon black are used as conductive additives, the graphene and the conductive carbon black are compounded with the epoxy resin under the action of the hyperdispersant and the compositesolvent, so that the graphene in the prepared carbon-based conductive ink filler can enable the conductivity of the ink to be better on one hand, and on the other hand, the conductive performance complementation is realized by compounding the conductive carbon black and the graphene, thereby achieving the most ideal conductive effect; and the conductive ink can be better dispersed in the connecting resin, so that the conductive uniformity of the conductive ink is improved.