Preparation method and application method of graphene oxide/carbon nanotube asymmetric separation membrane
A technology of carbon nanotubes and application methods, which is applied in the field of membrane separation water treatment, can solve the problems of membrane water permeability limitation, reduction of graphene oxide oxygen-containing functional groups, reduction of interception performance, etc., to achieve enhanced ion interception performance and enhanced ion partitioning effect , The effect of ion retention improvement
Active Publication Date: 2021-03-16
DALIAN UNIV OF TECH
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Abstract
The invention belongs to the technical field of membrane separation water treatment, and provides a preparation method and an application method of a graphene oxide/carbon nanotube asymmetric separation membrane. The preparation method comprises the following steps: subjecting acidified carbon nanotubes to vacuum filtration onto a support membrane substrate to form a carbon nanotube layer of the separation membrane; and then preparing a mixed solution of graphene oxide, diamine and polyelectrolyte, and subjecting the mixed solution to vacuum filtration on to the carbon nanotube layer so as toform the graphene oxide/carbon nanotube asymmetric separation membrane. The application method comprises the following steps: taking the carbon nanotube layer of the graphene oxide/carbon nanotube asymmetric separation membrane as a working electrode, applying a voltage, enabling a graphene oxide layer to be positioned between the working electrode and a counter electrode, and performing electricfield assisted membrane filtration by adopting a cross-flow filtration mode. The preparation method provided by the invention is simple and easy to operate, and expensive raw materials and equipment are not needed; and water flux and ion interception performance can be improved at the same time under the auxiliary effect of an electric field.
Application Domain
Semi-permeable membranes
Technology Topic
DiamineChemistry +7
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PUM
Property | Measurement | Unit |
Thickness | 0.1 ~ 1.0 | µm |
Thickness | 0.5 ~ 5.0 | µm |
Thickness | 0.4 | µm |
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