Abstract: A method of preparing a composite material includes the steps of: (a) dispersing graphene material and graphene oxide material in a solution, where the weight ratio of the graphene material to the graphene oxide material is between 0.2-1; and (b) after step (a), stirring the solution at a first temperature.

Abstract: Disclosed are a graphene material and a manufacturing method thereof. A high molecule powder material is uniformly mixed with a blend of carbon black and graphene to form a material mixture. An electrostatic spraying operation is conducted by using an electrostatic spray gun to spray the material mixture of the high molecule powder material, carbon black, and graphene to a surface of a substrate so as to form a graphene coating layer such that the substrate supports the graphene coating layer. The high molecule powder material is at least 10 grains and the blended carbon black and graphene takes weight percentage of 1-10%. Carbon black is distributed in graphene so that mutual contact between carbon black and graphene and material properties of carbon black that show high conductivity makes electrical charges contained in the graphene material easy to move.

Abstract: The present invention relates to a graphene composite material and a preparation method thereof, wherein the preparation method of the graphene composite material comprises the steps of: providing a modification solution comprising a compound having catechol group, and a first solvent; adding a graphene material into the modification solution; and mixing the graphene material and the modification solution to form a graphene composite material.

Abstract: A graphene film and a manufacturing method thereof are disclosed. A polymer solution and graphene flakes (such as graphene powder) are mixed to form liquid graphene. The liquid graphene is disposed, in batches, into a stirring device to be stirred uniformly by the stirring device. The stirred liquid graphene is coated on a substrate (such as a paper material) to form a graphene coating layer supported on the substrate. A drying device is used to remove liquid from the polymer solution. As such, the graphene flakes having a weak bonding force is first process to form liquid graphene, which is uniformly coated on a substrate to form a graphene film having a fixed shape and strong bonding force thereby integrally bonded to the substrate as a unitary structure. The graphene film has a structure in which the graphene flakes are stacked in the same direction to form a laminate.

Abstract: A graphene filtering sheet is disclosed. The sheet includes a reduced grapheme oxide (r-GO) dispersed in a polymer with the reduced grapheme oxide (r-GO) having a chemical structure with C/O ratio ranging from 0.1 to 50. The reduced grapheme oxide is obtained via hydrothermal method. The graphene filtering sheet has a capacity of separating alcohol from water with an efficiency approximated to 100%.

Abstract: The present invention discloses a silica-like membrane for separating gas, which is modified from poly(dimethylsiloxane) (PDMS) membrane by an atmospheric pressure high temperature plasma torch (APHTPT). Furthermore, the present invention of the separating gas silica-like membrane with an inorganic/organic interface structure which has both the gas flux of the organic membrane and also the gas selectivity of the inorganic membrane.

Abstract: The invention provides a graphene derivative composite membrane and method for fabricating the same. The graphene derivative composite membrane comprises a support membrane made of porous polymer and a plurality of graphene derivative layers disposed on the support membrane wherein the distance between adjacent graphene derivative layers is about 0.3˜1.5 nm and the total thickness of the plurality of graphene derivative layers is more than 100 nm.

Abstract: The present invention discloses a silica-like membrane for separating gas, which is modified from poly(dimethylsiloxane) (PDMS) membrane by an atmospheric pressure high temperature plasma torch (APHTPT). Furthermore, the present invention of the separating gas silica-like membrane with an inorganic/organic interface structure which has both the gas flux of the organic membrane and also the gas selectivity of the inorganic membrane.

Abstract: The present invention discloses a method for characterizing a membrane in a wet condition using a positron annihilation spectrometer and a sample holder thereof. Positron annihilation lifetime spectroscopy (PALS) has been know to be an invaluable tool for investigating local free-volume hole properties in various materials. Accompanying with the method and sample holder disclosed by the invention, PAS and PALS can measure the properties of various materials, such as free volume and layer structures both in the dry and wet states.

Abstract: The present invention discloses a method for characterizing a membrane in a wet condition using a positron annihilation spectrometer and a sample holder thereof. Positron annihilation lifetime spectroscopy (PALS) has been know to be an invaluable tool for investigating local free-volume hole properties in various materials. Accompanying with the method and sample holder disclosed by the invention, PAS and PALS can measure the properties of various materials, such as free volume and layer structures both in the dry and wet states.