Method for preparing tubular graphene composite membrane

Patent metadata

Field	Value
Publication number	US-12539497-B2
Application number	US-201415307000-A
Country	US
Kind code	B2
Filing date	Aug 27, 2014
Priority date	Mar 4, 2014
Publication date	Feb 3, 2026
Grant date	Feb 3, 2026

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.

First claim

What is claimed is:

1 . 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.

2 . The method according to claim 1 , wherein the tubular ceramic membrane support is a single tubular support, a multi-channel tubular support, a single tubular hollow fiber support, a multi-channel hollow fiber or a honeycomb ceramic support.

3 . The method according to claim 1 , wherein a material of the tubular ceramic membrane support is one or two of ZnO, Al 2 O 3 , TiO 2 or ZrO 2 .

4 . The method according to claim 1 , wherein, the sealant is one of polyurethane sealant, phenolic resin sealant, silicone sealant, vulcanized silicone sealant, epoxy resin sealant or polyacrylic resin sealant.

5 . The method according to claim 1 , wherein, the solvent is one of water, ethyl alcohol, DMF, methyl alcohol or DMSO.

6 . The method according to claim 1 , wherein, the graphene material is one of graphene, sulfhydrylated graphene, oxidized graphene, hydroxylated graphene, aminated graphene, or carboxylated graphene.

7 . The method according to claim 1 , wherein, the concentration of the membrane preparing solution is 0.001-1 mg/mL.

8 . The method according to claim 1 , wherein, the pressure of the vacuum pump is 100-2000 Pa.

Assignees

• Nanjing University Of Technology

Inventors

• Jin Wanqin
• Huang Kang
• Liu Gongping

Classifications

• B01D71/0211

  Graphene or derivates thereof · CPC title

• B01D69/108

  Inorganic support material · CPC title

• B01D69/08

  Hollow fibre membranes (manufacture of hollow fibres D01D5/24, D01F1/08) · CPC title

• B01D69/02

  characterised by their properties · CPC title

• B01D69/04 Primary

  Tubular membranes · CPC title