Simultaneous reduction and functionalization of graphene oxide sheets with tannic acid for a strong composite material with multi-modally interactive interfaces
| Autor: | Beomjoo Yang, Su-Hyeon Go, Changsoon Choi, Yoo-Bin Kwon, Tae Hoon Seo, Young Kwan Kim, Min Wook Lee |
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| Rok vydání: | 2021 |
| Předmět: |
Toughness
Materials science Graphene Hydrogen bond Mechanical Engineering Oxide General Chemistry Electronic Optical and Magnetic Materials law.invention chemistry.chemical_compound chemistry Chemical engineering Covalent bond law Ultimate tensile strength Materials Chemistry Surface modification Lamellar structure Electrical and Electronic Engineering |
| Zdroj: | Diamond and Related Materials. 119:108565 |
| ISSN: | 0925-9635 |
| DOI: | 10.1016/j.diamond.2021.108565 |
| Popis: | A multi-modally interactive interface is investigated to develop a strong structural material based on hybridization of graphene oxide (GO) and tannic acid (TA) through cross-linking with coordination and covalent bonds. GO is reduced and functionalized with TA by a simple wet-chemical reaction. The resulting TA-reduced and functionalized GO (TA-RGO) sheets are macroscopically assembled into lamellar structured paper like artificial nacre by vacuum-assisted filtration. The assembled TA-RGO paper is sequentially cross-linked by Fe3+ ion and polyethyleneimine (PEI) to form a strong interface through multimodal interactions such as hydrogen bonding, covalent bonding, coordination and π-π interactions. The suspended, assembled and cross-linked TA-RGO sheets are systematically characterized by various analytical tools. By forming the multimodal interactions, the tensile strength, modulus and toughness of GO paper were enhanced from 59.5 ± 4.1 MPa, 7.8 ± 1.4 GPa, and 765 ± 112 kJ/m3 to 167.7 ± 15.4 MPa, 17.6 ± 0.4 GPa, and 1484 ± 192 kJ/m3, respectively. Based on the results, we clearly demonstrated TA can be harnessed as a multifunctional agent for reducing, functionalizing and cross-linking RGO sheets to construct a strong structural material by forming multi-modally interactive interfaces. |
| Databáze: | OpenAIRE |
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