Scalable and Versatile Graphene Functionalized with the Mannich Condensate
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- 作者：Ruijuan Liao ; Zhenghai Tang ; Tengfei Lin ; Baochun Guo
- 刊名：ACS Applied Materials & Interfaces
- 出版年：2013
- 出版时间：March 27, 2013
- 年：2013
- 卷：5
- 期：6
- 页码：2174-2181
- 全文大小：549K
- 年卷期：v.5,no.6(March 27, 2013)
- ISSN：1944-8252
文摘
The functionalized graphene (JTPG) is fabricated by chemical conversion of graphene oxide (GO), using tea polyphenols (TP) as the reducer and stabilizer, followed by further derivatization through the Mannich reaction between the pyrogallol groups on TP and Jeffamine M-2070. JTPG exhibits solubility in a broad spectrum of solvents, long-term stability and single-layered dispersion in water and organic solvents, which are substantiated by AFM, TEM, and XRD. The paper-like JTPG hybrids prepared by vacuum-assisted filtration exhibits an unusual combination of high toughness (tensile strength of 275 MPa and break strain of 8%) and high electrical conductivity (700 S/m). Still, JTPG is revealed to be very promising in the fabrication of polymer/graphene composites due to the excellent solubility in the solvent with low boiling point and low toxicity. Accordingly, as an example, nitrile rubber/JTPG composites are fabricated by the solution compounding in acetone. The resulted composite shows low threshold percolation at 0.23 vol.% of graphene. The versatilities both in dispersibility and performance, together with the scalable process of JTPG, enable a new way to scale up the fabrication of the graphene-based polymer composites or hybrids with high performance.