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US 12,539,497 B2Granted
Method for preparing tubular graphene composite membrane
AssigneeNanjing University of Technology
InventorsWanqin Jin, Kang Huang, Gongping Liu
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Abstract
A method for preparing a graphene composite membrane on the surface of a tubular support. In the method, a tubular ceramic membrane is used as the support, a layer of graphene material is uniformly prepared on the surface of the support by vacuum suction, and the defect-free tubular graphene composite membrane is obtained by the drying process.
Claims8
A method for preparing tubular graphene composite membrane through vacuum suction;
- the specific steps are as follows:
- (1) Preprocessing of a support:
- selecting a tubular ceramic membrane as a support;
- drying it after flushing with water;
- sealing one end of the support with a sealant and connecting the other end of the support to a vacuum pump with a pipeline through a surge flask and a pressure regulating valve;
- (2) Preparation of a membrane preparing solution:
- dissolving a graphene material into a solvent;
- obtaining a uniformly dispersed membrane preparing solution through ultrasonic processing;
- (3) Preparation of membrane:
- immersing the tubular support processed in Step (1) in the membrane preparing solution;
- starting the vacuum pump and holding for 1-12 hours after the pressure is stabilized;
- (4) Placing the prepared membrane in a vacuum drying oven and dry the membrane under 25° C.-50° C.
9 more elements
Dependencies are inferred from the claim text.