Macroporous foam of reduced graphene oxides prepared by lyophilization

Macroporous foam of reduced graphene oxides prepared by lyophilization

In this study, we demonstrate that water-soluble grafted polymer polyfluorene-grafted-poly(sulfobetainemetahcrylate) (PF-g-PSBMA) allows chemically reduced GO sheets dispersed in aqueous solution due to its ability to stably disperse hydrophobic rGO sheets. Based on the stable rGO/PF-g-PSBMA dispers...

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Bibliographic Details
Main Authors: Lu, Xiaomei, Wei, Ang, Fan, Qu-Li, Wang, Lianhui, Chen, Peng, Dong, Xiaochen, Huang, Wei
Other Authors: School of Chemical and Biomedical Engineering
Format: Article
Language:English
Published: 2013
Subjects:
DRNTU::Science::Medicine::Biomedical engineering
Online Access:https://hdl.handle.net/10356/96051
http://hdl.handle.net/10220/11163
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Institution: Nanyang Technological University
Language: English
Description
Summary:In this study, we demonstrate that water-soluble grafted polymer polyfluorene-grafted-poly(sulfobetainemetahcrylate) (PF-g-PSBMA) allows chemically reduced GO sheets dispersed in aqueous solution due to its ability to stably disperse hydrophobic rGO sheets. Based on the stable rGO/PF-g-PSBMA dispersion, macroporous graphene foam can be simply obtained by lyophilization process (freeze-drying). The resulting composite foam exhibits three-dimensional macroporous structure with high specific surface area and can easily re-dissolve into water. Also, the stable rGO/PF-g-PSBMA dispersion allows solution-based fabrication of thin-film graphene devices. Moreover, PF-g-PSBMA can be removed from rGO foam or film by thermal annealing, and the conductivity of rGO film can be greatly enhanced likely due to its annealing ability.

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