| Properties of Graphene Oxide/Polyimide Composite Film for Seawater Desalination |
| Received:May 16, 2019 Revised:May 16, 2019 |
| DOI：10.12136/j.issn.1000-890X.2020.03.0170 |
| Key Words: GO；PI；composite film；reverse osmosis film；seawater desalination；desiccation property |
| Author Name | Affiliation | E-mail | | SHAN Tikun | Qingdao University of Science and Technology | | | JIANG Rui | Qingdao University of Science and Technology | | | DU Pengpeng* | Qingdao University of Science and Technology | duweijielovesui@163.com |
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| Abstract: |
| The graphene oxide（GO） synthesized by the improved Hummer method was dispersed in the polyimide（PI） matrix，the GO/PI composite film for the seawater desalination was prepared by using a vacuum filtration device，and the properties of the composite film were studied.The results showed that， with the appropriate amount of GO（mass fraction was 0. 010），the surface morphology of the film was significantly improved，and the surface holes and cracks of the films were eliminated or reduced. Compared with PI film，the hydrophilic property and tensile property of GO/PI composite films were improved. After adding an appropriate amount of GO（mass fraction was 0.010），the composite film had better esalination
property，and as the temperature increasing，the desalination property was improved. When the temperature reached 75 ℃，the composite film had a large ion removal rate（99. 4%） and water permeability（36. 1 kg·m-2·h-1）. After several tests，the desalination property of the composite films could still be maintained at a high level，showing good stability. GO/PI composite film showed great potential to be used as the reverse osmosis film for the seawater desalination. |
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