Fabrication of a Strong Artificial Nacre Based on Tannic Acid-Functionalized Graphene Oxide and Poly(vinyl alcohol) Through Their Multidentate Hydrogen Bonding

Yoo Bin Kwon, Sang Ryong Lee, Tae Hoon Seo, Young Kwan Kim

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

A strong graphene oxide (GO)-based artificial nacre is developed by using a simple and efficient interfacial chemistry. GO is simultaneously reduced and functionalized with tannic acid (TA) and the resulting TA-reduced GO (TA-RGO) exhibits a high aqueous dispersibility owing to abundant phenol groups. TA-RGO sheets are incorporated with poly(vinyl alcohol) (PVA) and then assembled into an artificial nacre-like structure by vacuum-assisted filtration to induce the formation of multidentate interfacial hydrogen bonding between TA-RGO and PVA. Based on the multidentate hydrogen bonding, the resulting TA-RGO/PVA (1 wt%) composite film presented an overall and efficient reinforcement of tensile strength (186.1 ± 12.8 MPa), modulus (15.2 ± 1.2 GPa) and toughness (1546 ± 248 kJ/m3) compared to those of GO (83.3 ± 5.4 MPa, 8.9 ± 0.4 GPa and 1434 ± 152 kJ/m3) and TA-RGO (87.6 ± 10.6 MPa, 13.8 ± 1.4 GPa and 306 ± 51 kJ/m3), respectively. The present study demonstrates the rational design of interfacial interaction can greatly improve the performance of a structural composite material.[Figure not available: see fulltext.].

Original languageEnglish
Pages (from-to)279-284
Number of pages6
JournalMacromolecular Research
Volume30
Issue number4
DOIs
StatePublished - Apr 2022

Keywords

  • artificial nacre
  • graphene oxide
  • hydrogen boding
  • poly(vinyl alcohol)
  • tannic acid

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