Patent application number | Description | Published |
20130197256 | METHOD FOR THE PREPARATION OF GRAPHENE - A method for the preparation of graphene is provided, which includes: (a) oxidizing a graphite material to form graphite oxide; (b) dispersing graphite oxide into water to form an aqueous suspension of graphite oxide; (c) adding a dispersing agent to the aqueous suspension of graphite oxide; and (d) adding an acidic reducing agent to the aqueous suspension of graphite oxide, wherein graphite oxide is reduced to graphene by the acidic reducing agent, and graphene is further bonded with the dispersing agent to form a graphene dispersion containing a surface-modified graphene. The present invention provides a method for the preparation of graphene using an acidic reducing agent. The obtained graphene can be homogeneously dispersed in water, an acidic solution, a basic solution, or an organic solution. | 08-01-2013 |
20130327702 | STRUCTURE OF AN ELECTROCHEMICAL SEPARATION MEMBRANE AND MANUFACTURING METHOD FOR FABRICATING THE SAME - A structure of an electrochemical separation membrane and a manufacturing method for fabricating the same are disclosed. The structure of an electrochemical separation membrane includes a base-phased polymer part in form of a continuous phase structure, a fabric-supported part distributed in the base-phased polymer part in striped shape to provide mechanic strength thereto, and inorganic particles distributed uniformly in the base-phased polymer part with 0.1 wt %˜50 wt %, wherein the fabric-supported part is a porous structure with a plurality of micro holes such that the base-phased polymer part filled into the micro holes to obtain better adhesive strength, inorganic particles distributed uniformly in the base-phased polymer part to reduce the shrinking of separation membrane and hence improving the thermal stability under high temperature. A lithium ion battery applying the electrochemical separation membrane of the present invention can reduce resistance, increase charge/discharge capacitance and prolong lifespan. | 12-12-2013 |
20130327704 | ELECTROCHEMICAL SEPARATION MEMBRANE AND THE MANUFACTURING METHOD THEREOF - An electrochemical separation membrane and the manufacturing method thereof are disclosed. The method includes: a polymer solution preparing step to mix a polymer material, solvent and ceramic precursors thoroughly to form a polymer solution, wherein the polymer material and the ceramic precursors are dissolved uniformly in the solvent; a coating step to coat the polymer solution on a porous base material; a hydrolysis step to cause the porous base material coated with the polymer solution to contact an aqueous solution to hydrolyze the ceramic precursor into ceramic particles; and a drying step to remove the water and the solvent from the porous base material and in order to form the electrochemical separation membrane. The electrochemical separation membrane made of this method have better ion conductivity, interface stability and thermal stability based on the ceramic particles. | 12-12-2013 |
20140342955 | Modified Lubricant - A modified lubricant includes lubricant grease and nano-graphite plates dispersed thoroughly in the lubricant grease. The content of the nano-graphite plates is 0.0001 wt % to 10 wt %. Each nano-graphite plate has a length or a width between 1 and 100 μm, a thickness within 10 nm and 100 nm, and N graphene layers stacked together and a surface modifying layer disposed on the top or bottom of the nano-graphite plates, wherein N is 30 to 300. The surface modifying layer has a surface modifying agent which includes at least two functional groups located at two ends of the surface modifying agent, one of the two functional groups is chemically bonded with certain organic functional group remaining on the surface of the nano-graphite plate, and the other of the two functional groups forms the functional surface of the nano-graphite plate. | 11-20-2014 |
20150118491 | HOLLOW GRAPHENE NANOPARTICLE AND METHOD FOR MANUFACTURING THE SAME - Disclosed are a hollow graphene nanoparticle and a method for manufacturing the same. The hollow graphene nanoparticle is made of graphene sheets stacked together, and has a particle size of 10˜500 nm and a specific surface area greater than 500 m | 04-30-2015 |
20150158729 | Method for Manufacturing Nano-Graphene Sheets - A method for manufacturing nano-graphene sheets, includes: intercalating and oxidizing a graphite material to form a graphite oxide by mixing the graphite material with an intercalation agent and oxidant; contacting the graphite oxide with a heat source to thermally flake the graphite oxide to nano-graphite sheets; suspending the nano-graphite sheets in a liquid medium and applying a mechanical shear force larger than 5,000 psi to mechanically flake the nano-graphite sheets for reducing the lateral size and thickness to form a nano-graphene suspension solution; separating the nano-graphene sheets from the nano-graphene suspension solution and drying the nano-graphene sheets; and finally reducing and heat treating the nano-graphene sheets to lower the oxygen content to less than 3 wt % and decrease the crystal defects. | 06-11-2015 |
20150221409 | Graphene Composite Fiber and Method for Manufacturing the Same - Disclosed is a graphene composite fiber and a method for manufacturing the same. The graphene composite fiber includes a polymer material and graphene sheets which are 1˜10% by weight of the graphene composite fiber, each having a modified layer with first organic functional groups and second organic functional groups for forming chemical bonds with the surface of the graphene sheet and the polymer material, respectively. The polymer material is a thermoplastic polymer for enclosing the graphene sheets. The method includes steps of preparing graphene sheets, modifying the surfaces of the graphene sheets, adding melted polymer material, blending, forming composite raw particles through the granulator, and finally spinning to form the graphene composite fibers. The graphene composite fibers of the present invention are manufactured by simple processes and possess excellent mechanical strength, thermal conductivity and electrical conductivity, thereby replacing commonly used fibers. | 08-06-2015 |
20150368439 | Graphene Polymer Composite Material - Disclosed is a graphene polymer composite material, including a matrix resin, a filler and a plurality of nano-scaled graphene sheets. Each nano-scaled graphene sheet has a surface-modified layer formed of a surface modifying agent, which provides hydrophilic and hydrophobic functional groups used to form chemical bonds with the matrix resin and the filler, thereby greatly improving strength of junction cohesion. The filler helps the graphene sheets to contact each other so as so to increase overall electrical conductivity and thermal conductivity. Since the graphene sheets are uniformly dispersed in the matrix resin, the composite material of the present invention possesses excellent mechanical property, anti-oxidation, acid-base resistance, high electrical conductivity and thermal conductivity. Therefore, the composite material is suitable for the industries in need of high performance material. | 12-24-2015 |