摘要:
The present invention discloses an electroconductive particle comprising (a) a polymer microparticle, and (b) a graphene coating layer grafted on the polymer microparticle, which has improved long-term stability of the conductivity, surface conductivity, durability, and thermal resistance, and is applicable for producing an anisotropic conductive film used for packaging electronic devices.
摘要:
Methods of preparing reduced graphene oxide and reduced graphene oxide-polymer composites. The methods include covalently binding a halogen-substituted aromatic compounds to a graphene oxide and heat treating the graphene oxide with the halogen-substituted aromatic compounds covalently bound thereto at a low temperature, for example, 450° C. or less. By using the methods, reduced graphene oxide and reduced graphene oxide-polymer composites that have high electrical conductivities (e.g., 30,000 S/m or more) may be obtained.
摘要:
A method for fabricating a graphene thin film by reducing graphene oxide and a method for fabricating an optoelectronic device using the same are provided. The method for fabricating a graphene thin film comprises: (a) preparing graphene oxide; (b) preparing graphene through reducing the graphene oxide by a sulfonyl hydrazide-based reducing agent; (c) preparing a graphene dispersed solution by dispersing the graphene into an organic solvent; and (d) fabricating a graphene thin film by applying the graphene dispersed solution. The sulfonyl hydrazide-based reducing agent may be a compound having a sulfonyl hydrazide substituent of Chemical Formula 1 in the present disclosure in which A may be any one in Chemical Formula 2 in the present disclosure.
摘要:
Provided is a preparation method for carbon materials, carbon materials prepared from the same, and a product including the carbon materials, in which the preparation method including forming a polymer layer containing a polymer, stabilizing the polymer layer to form a cyclized aromatic structure of carbon atoms in the polymer, and carbonizing the stabilized polymer layer.
摘要:
A heavy metal remover of a core-shell structure comprises a core including carbon nanotubes (CNT) that can aggregate and scatter in a reversible manner, and a shell including iron oxide. A method for fabricating a heavy metal remover of a core-shell structure comprises (a) preparing a carbon nanotube (CNT) aqueous solution where acid-treated CNTs have dissolved, (b) mixing the CNT aqueous solution with an aqueous solution of polymer template particles, thereby forming a CNT layer on the surface of the template particles, (c) mixing the solution having undergone the step (b) with a polymer electrolyte having positive charges, thereby forming a polymer layer on an outer surface of the CNT layer, (d) adding FeSO4, Fe2(SO4)3 or a mixture thereof to the solution having undergone the step (c), and stirring the solution, thereby including iron oxide in the polymer layer, (e) separating particles from the solution having undergone the step (d), and (f) removing the template particles by heat-treating the particles having been separated in the step (e). The method for removing heavy metal ions is capable of removing heavy metal ions by adsorbing the heavy metal ions into the CNTs of the core, with using the heavy metal remover of a core-shell structure.
摘要:
A graphene-iron oxide complex consists of graphene and needle-like iron oxide nanoparticles grown on a surface of the graphene, and a fabricating method thereof includes (A) preparing a reduced graphene dispersed solution, (B) mixing the dispersed solution with a solution containing iron oxide precursors to prepare a mixture, (C) stirring the mixture to prepare a graphene-iron oxide dispersed solution containing the graphene-iron oxide complex that needle-like iron oxide nanoparticles are grown on the surface of the graphene, and (D) separating the graphene-iron oxide complex from the graphene-iron oxide complex dispersed solution.