کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1489399 | 992306 | 2012 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Macroporous foam of reduced graphene oxides prepared by lyophilization Macroporous foam of reduced graphene oxides prepared by lyophilization](/preview/png/1489399.png)
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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► rGO aqueous dispersion obtained with the assistance of water-soluble polymer PF-g-PSBMA.
► rGO/PF-g-PSBMA foam can be simply obtained by lyophilization process.
► rGO/PF-g-PSBMA foam can re-dissolve into water to fabricate rGO thin-film devices.
Journal: Materials Research Bulletin - Volume 47, Issue 12, December 2012, Pages 4335–4339