METHODS FOR PRODUCING GRAPHENE WITH TUNABLE PROPERTIES BY A MULTI-STEP THERMAL REDUCTION PROCESS

• Main Authors: GARCIA SAN LUIS JESUS, MENENDEZ LOPEZ ROSA MARIA, CALLE GOMEZ FERNANDO, FERNANDEZ LAURA, ALVAREZ RODRIGUEZ PATRICIA, BLANCO PATRICIA, GRANDA MARCOS, SANTAMARIA RAMIREZ RICARDO, PAEZ DUENAS ANTONIO, BLANCO RODRIGUEZ CLARA
• Format: Patent
• Language: English; Korean
• Published: 31.05.2017
• Subjects: CHEMISTRY; COMPOUNDS THEREOF; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; INORGANIC CHEMISTRY; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; METALLURGY; NANOTECHNOLOGY; NON-METALLIC ELEMENTS; PERFORMING OPERATIONS; SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS; TRANSPORTING

본 발명은 a) 박리를 일으키기 충분한 700℃ 이하의 온도 및 불활성 분위기 하에서 그래파이트 옥사이드를 플래시 열 처리; b) 90℃ 아래에서 이전 단계에서 얻어진 물질을 냉각; 및 c) 단계 a)에서의 온도보다 높은 온도 및 불활성 분위기 하에서 이전 단계로부터 결과된 물질을 가열하는 단계를 포함하고, 상기 가열 속도는 1 내지 15℃/분인 그래핀 제조 공정에 관한 것이다. 본 발명은 또한, 우수한 물리-화학적 특성을 나타내는, 그렇게 얻어진 그래핀에 관한 것이다. A process for the preparation of graphene includes the steps of a) providing flash thermal treatment of a graphite oxide at a temperature up to 700° C. sufficient to produce exfoliation and under inert atmosphere and b) cooling the material obtained in the previous step below 90° C. The method further includes the step of c) heating the material resulting from the previous step under inert atmosphere at a temperature which is higher than the temperature of step a), wherein the heating rate is between 1 and 15° C./min. The graphenes obtained from the process exhibit excellent physico-chemical properties.