公开(公告)号：US11820053B2

公开(公告)日：2023-11-21

申请号：US16765861

申请日：2018-11-14

申请人： Institute of Metal Research Chinese Academy of Sciences

发明人： Wencai Ren ,  Jing Zhong ,  Huiming Cheng

IPC分类号： B29C41/04 ,  B29C41/42 ,  B29C41/46 ,  B29C41/00 ,  B29C69/00 ,  B29C41/22 ,  B29L7/00

CPC分类号： B29C41/042 ,  B29C41/003 ,  B29C41/22 ,  B29C41/42 ,  B29C41/46 ,  B29C69/001 ,  B29L2007/008

摘要： An efficient method for preparing a highly-directional highly-dense two-dimensional material film. The method comprises: using a circular tube with a smooth inner surface as a casting mold; and pouring a solution containing a two-dimensional material into the mold when the mold rotates at high speed in a circumferential direction, wherein the solution is uniformly coated on the inner surface of the mold by centrifugal force, the centrifugal rotation generating a shearing force that causes the two-dimensional material to be directionally and regularly arranged layer upon layer in a circumferential direction in the solution, and, the centrifugal force facilitates highly-dense accumulation of the two-dimensional material, thereby obtaining a highly-directional highly-dense two-dimensional material film. The method is applicable in the preparation of a variety of two-dimensional materials such as graphene, a composite material film thereof, and a laminated heterostructure film, and greatly improves electrical, thermal, and mechanical properties of a film.

公开(公告)号：US10508037B2

公开(公告)日：2019-12-17

申请号：US16087922

申请日：2017-03-22

申请人： Institute of Metal Research Chinese Academy of Sciences

发明人： Songfeng Pei ,  Wencai Ren ,  Huiming Cheng

IPC分类号： C01B32/192 ,  C01B32/205 ,  C01B32/23 ,  C01B32/198 ,  C01B32/225 ,  B82Y30/00 ,  B82Y40/00

摘要： Provided is a method for continuously preparing graphene oxide nanoplatelets by electrochemical treatment, comprising using a continuous graphite product, successively processing two step treatments, i.e. an electrochemical intercalation and an electrolytic oxidation stripping. The electrochemical intercalation is carried out in a concentrated acid, using a graphite material as an anode and energizing under a soaking condition such that acid radical ions enter into graphite interlamination under the drive of an electric field, to form an intercalated graphite continuous material with first-order or low-order intercalation. The electrolytic stripping is using the intercalated continuous graphite material as an anode, energizing in an aqueous electrolyte solution, and performing oxidation stripping. The method has the following advantages: a product does not contain a metal impurity, the oxidation degree of graphene is controllable, the process is continuable and automatable, and the method is safe and has low emissions, etc.