METHOD FOR MANUFACTURING OF NON-OXIDIZED GRAPHENE DISPERSION USING GRAPHENE OXIDE AS DISPERSION STABILIZER AND MANUFACTURED NON-OXIDIZED GRAPHENE DISPERSION THEROF

• Main Authors: CHOI SULHWA, GYOYEON BYUN, CHOI EUNJUNG, YU CHANGSU
• Format: Patent
• Language: English; Korean
• Published: 22.08.2023
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; COMPOUNDS THEREOF; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

The present invention relates to a method for manufacturing a non-oxidized graphene dispersion using graphene oxide as a dispersion stabilizer, and to a non-oxidized graphene dispersion manufactured therefrom. The method for manufacturing a non-oxidized graphene dispersion using graphene oxide as a dispersion stabilizer according to the present invention comprises the steps of: producing an aqueous solution of graphene oxide by ultrasonic dispersion of graphene oxide; producing a mixed graphene aqueous solution by mixing powder-state non-oxidized graphene into the aqueous solution of graphene oxide; producing a non-oxidized graphene dispersion through dispersion by applying a physical force to the produced mixed graphene aqueous solution. The non-oxidized graphene dispersion, which exhibits excellent electrical, thermal, and mechanical properties of non-oxidized graphene and also excellent dispersibility of graphene oxide, is provided by using graphene oxide as a dispersion stabilizer for the non-oxidized graphene, rather than a dispersion stabilizer such as a polymer, surfactant, or the like, for bonding by π-π interactions above and below pure graphene in the graphene oxide and non-oxidized graphene dispersion. 본 발명은 산화 그래핀을 분산 안정제로 사용한 비산화 그래핀 분산액 제조방법 및 이로부터 제조된 비산화 그래핀 분산액에 관한 것이다. 본 발명에 따른 산화 그래핀을 분산 안정제로 사용한 비산화 그래핀 분산액 제조방법은, 산화그래핀을 초음파 분산하여 산화그래핀 수용액을 제조하는 단계, 상기 제조된 산화그래핀 수용액에 분말 상태의 비산화그래핀을 혼합하여 혼합 그래핀 수용액을 제조하는 단계, 상기 제조된 혼합 그래핀 수용액에 물리적 힘을 인가하여 분산을 통해 비산화그래핀 분산액을 제조하는 단계를 포함하며, 비산화그래핀에 고분자, 계면활성제 등의 분산 안정제가 아닌 산화그래핀을 분산 안정제로 사용하여, 산화그래핀과 비산화그래핀 분산액 내의 순수 그래핀의 상하에서 π-π 상호작용으로 결합하여, 비산화그래핀의 우수한 전기적, 열적, 기계적 물성을 구현함과 동시에, 산화그래핀의 우수한 분산성을 나타내는 비산화그래핀 분산액을 제공할 수 있다.