A method for obtaining graphene oxide is provided comprising the steps of a) adding an acid and a salt to graphite for obtaining a graphite oxide, and b) exfoliating the graphite oxide by mixing it, wherein the steps a) and b) are carried out simultaneously in a high shear mixer.

A resin composite material includes: fine graphite particles including plate-like graphite particles, an aromatic vinyl copolymer which is adsorbed on the plate-like graphite particles, and which contains a vinyl aromatic monomer unit represented by the following formula (1):
—(CH.sub.2—CHX)—  (1) (in the formula (1), X represents a phenyl group, a naphthyl group, an anthracenyl group, or a pyrenyl group, provided that these groups may have each a substituent), and at least one hydrocarbon chain which is bonded to the aromatic vinyl copolymer, and which is selected from the group consisting of alkyl chains, oligoolefin chains, and polyolefin chains.

A process for preparing an anticorrosive coating includes providing a substrate, providing a sacrificial metal particle, chemically binding a graphitic material to a first molecule comprising a first group, a first spacer, and a second group, chemically binding said graphitic material to a second molecule comprising a third group, a second spacer, and a fourth group, wherein said third group is a different group from said first group, binding said sacrificial metal particle to either said first or said third group, binding either said first or said third group with said substrate, wherein said group bound to said substrate is different from said group bound to said sacrificial metal particle, chemically binding said second group and said fourth group to said graphitic material, growing thermoset resin side chains on said graphitic material, and growing siloxane side chains on said graphitic material.

The present invention relates to a partially oxidized graphene and a method for preparing the same. Since the partially oxidized graphene is prepared by subjecting the partially oxidized graphite to a high pressure homogenization, the exfoliation efficiency is excellent, the inherent characteristics of graphene are maintained even without using a reduction step after exfoliation, and the dispersibility thereof in organic solvents is excellent, and thus the invention can be applied to various fields.

Provided is a vapor-based heat transfer apparatus (e.g. a vapor chamber or a heat pipe), comprising: a hollow structure having a hollow chamber enclosed inside a sealed envelope or container made of a thermally conductive material, a wick structure in contact with one or a plurality of walls of the hollow structure, and a working liquid within the hollow structure and in contact with the wick structure, wherein the wick structure comprises a graphene material and the hollow structure walls comprise an evaporator wall having a first surface plane and a condenser wall having a second surface plane, wherein multiple sheets of the graphene material in the wick structure are aligned to be substantially parallel to one another and perpendicular to at least one of the first surface plane and the second surface plane. Also provided is a process for producing this apparatus.

Provided is a vapor-based heat transfer apparatus (e.g. a vapor chamber or a heat pipe), comprising: a hollow structure having a hollow chamber enclosed inside a sealed envelope or container made of a thermally conductive material, a wick structure in contact with one or a plurality of walls of the hollow structure, and a working liquid within the hollow structure and in contact with the wick structure, wherein the wick structure comprises a graphene material and the hollow structure walls comprise an evaporator wall having a first surface plane and a condenser wall having a second surface plane, wherein multiple sheets of the graphene material in the wick structure are aligned to be substantially parallel to one another and perpendicular to at least one of the first surface plane and the second surface plane. Also provided is a process for producing this apparatus.

Provided are a scroll preparing method using a two-dimensional material and a scroll prepared thereby. The scroll preparing method comprises preparing a two-dimensional material. The two-dimensional material is scrolled by providing an amphiphilic substance having a hydrophilic portion and a hydrophobic portion on the two-dimensional material. As a result, a scroll composite including the amphiphilic substance disposed inside a scroll structure is formed.

Provided are a scroll preparing method using a two-dimensional material and a scroll prepared thereby. The scroll preparing method comprises preparing a two-dimensional material. The two-dimensional material is scrolled by providing an amphiphilic substance having a hydrophilic portion and a hydrophobic portion on the two-dimensional material. As a result, a scroll composite including the amphiphilic substance disposed inside a scroll structure is formed.

In order to prepare highly conductive and highly dispersible graphene and obtain an electrode for a lithium ion battery with good output characteristics and cycle characteristics, there is provided a graphene composition containing thiourea, the element ratio of sulfur to carbon being 0.04 or more and 0.12 or less in X-ray photoelectron spectroscopy measurement.

Existing methods of producing high quality graphene/graphite oxides are generally accomplished by exfoliating graphite into flakes and oxidizing the graphite flakes with strong oxidizers under extreme conditions and require careful purification. The oxidizers are typically strong acids used in high concentrations at elevated temperatures requiring complicated purification processes to yield oxidized graphene/sheets. The existing processes can cost up to $12,000/gram. This invention uses a mild oxidant combined with mechanical processing where the sole products are oxidized graphite/graphene and water without the need for further purification.