Kwon, Yoo-Bin Go, Su-Hyeon Choi, Changsoon Seo, Tae Hoon Yang, Beomjoo Lee, Min Wook Kim, Young-Kwan 2024-01-19T13:32:03Z 2024-01-19T13:32:03Z 2022-01-10 2021-11 0925-9635 https://pubs.kist.re.kr/handle/201004/116215 A multi-modally interactive interface is investigated to develop a strong structural material based on hybridi-zation 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 pi-pi 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/m(3) to 167.7 +/- 15.4 MPa, 17.6 +/- 0.4 GPa, and 1484 +/- 192 kJ/m(3), 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. English ELSEVIER SCIENCE SA Simultaneous reduction and functionalization of graphene oxide sheets with tannic acid for a strong composite material with multi-modally interactive interfaces Article 10.1016/j.diamond.2021.108565 1 DIAMOND AND RELATED MATERIALS, v.119 DIAMOND AND RELATED MATERIALS 119 N scie scopus 000704340000003 2-s2.0-85113389693 Materials Science, Multidisciplinary Materials Science, Coatings & Films Physics, Applied Physics, Condensed Matter Materials Science Physics Article SURFACE FUNCTIONALIZATION FACILE SYNTHESIS MEMBRANE CARBON PAPER NANOCOMPOSITES NANOPARTICLES FILMS Graphene oxide Reduction Eco-friendly Surface modification Artificial nacre