Abstract: Provided are a low-viscosity graphene oxide slurry and a preparation method thereof, a graphene oxide film and a preparation method thereof, and a graphene heat-conducting film and a preparation method thereof. A main method used comprises ultramicro-refining graphene oxide under high-pressure shearing, high-speed impacting and a strong cavitation action to reduce a flake diameter of the graphene oxide, thereby reducing a viscosity of the graphene oxide slurry and increasing a solid content of the graphene oxide slurry, so that an efficiency of coating the graphene oxide slurry into the graphene oxide film is improved.
Type:
Grant
Filed:
August 17, 2020
Date of Patent:
June 13, 2023
Assignee:
CHANGZHOU FUXI TECHNOLOGY CO., LTD
Inventors:
Jing Lu, Bucun Zhou, Renjie Zhou, Feng Li
Abstract: Provided are a slurry of graphene oxides with different degrees of oxidation, a composite film of graphene oxides, and a graphene heat-conducting film. The slurry of the graphene oxides comprises the graphene oxides and a solvent, and the graphene oxides include a strong graphene oxide and a weak graphene oxide, wherein the slurry comprises two graphene oxides with different degrees of oxidation, which can increase a carbon content in the graphene oxide per unit mass, so that the finally obtained graphene heat-conducting film has more carbon.
Type:
Grant
Filed:
March 7, 2022
Date of Patent:
April 4, 2023
Assignee:
CHANGZHOU FUXI TECHNOLOGY CO., LTD
Inventors:
Bucun Zhou, Renjie Zhou, Jing Lu, Dong Su, Zhaocheng Wang, Feng Li
Abstract: A slurry of the graphene oxides comprises the graphene oxides and a solvent. The graphene oxides include a strong graphene oxide and a weak graphene oxide. The slurry can be used to make composite films of graphene oxides and graphene heat-conducting films. The slurry includes two graphene oxides with different degrees of oxidation, which can increase a carbon content in the graphene oxide per unit mass, so that the finally obtained graphene heat-conducting film has more carbon.
Type:
Grant
Filed:
August 26, 2020
Date of Patent:
December 6, 2022
Assignee:
CHANGZHOU FUXI TECHNOLOGY CO., LTD
Inventors:
Bucun Zhou, Renjie Zhou, Jing Lu, Dong Su, Zhaocheng Wang, Feng Li
Abstract: The present disclosure relates to graphene. In particular, the present disclosure relates to a method for continuously preparing thermally conductive graphene films. A graphite oxide containing 40-60 wt % of moisture is directly stripped at a high temperature; and then, procedures such as dispersion, defoaming, coating, stripping, trimming, and reduction are performed to prepare thermally conductive graphene films with high thermal conductivity coefficient and strong electromagnetic shielding effectiveness. In the method, because of directly stripping the graphite oxide containing 40-60 wt % of moisture at a high temperature, the procedure of drying the graphite oxide is omitted, achieving low energy consumption and low manufacturing costs. Compared with preparing slurry by directly dispersing the graphite oxide, the concentration of the slurry after high temperature stripping is higher, and can reach 3-20 wt %.
Type:
Grant
Filed:
September 28, 2018
Date of Patent:
March 30, 2021
Assignee:
Changzhou Fuxi Technology Co., LTD.
Inventors:
Bucun Zhou, Renjie Zhou, Feng Li, Jing Lu