Nacre-Mimetic Graphene Oxide/Cross-Linking Agent Composite Films with Superior Mechanical Properties
- Authors
- Woo, Ju Yeon; Oh, Jun Ho; Jo, Sunghwan; Han, Chang-Soo
- Issue Date
- 4월-2019
- Publisher
- AMER CHEMICAL SOC
- Keywords
- nanomimetic; graphene oxide; cross-linking agent; composite; mechanical properties
- Citation
- ACS NANO, v.13, no.4, pp.4522 - 4529
- Indexed
- SCIE
SCOPUS
- Journal Title
- ACS NANO
- Volume
- 13
- Number
- 4
- Start Page
- 4522
- End Page
- 4529
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/66502
- DOI
- 10.1021/acsnano.9b00158
- ISSN
- 1936-0851
- Abstract
- We report a graphene oxide/cross-linking agent (GO/CA) composite inspired by the nacre structure. Based on the "brick-and-mortar" concept of nacre, graphene oxide and a cross-linking agent are covalently conjugated in the form of nacre. The mechanical characteristics of the nacre-mimetic GO/CA composite film can be controlled by adjusting the preparation method, degree of cross-linking, and cross-linking times. As a result, the cross linking strategy can drastically enhance the tensile strength [142.9 +/- 6.4 MPa (similar to 2.3-fold)], modulus [4.7 +/- 0.36 GPa (similar to 15.7-fold)], and hardness [917.4 +/- 85.7 MPa (similar to 9.0-fold)], which are superior to those of pristine materials. The cross-linking agent-based chemical bonding method for mechanically improved integration is mainly attributed to the formation of strong cross-linked networks between the GO-based 2D interfaces and CA. The facile fabrication process provides many opportunities to design advanced, robust, and integrated nacre-like GO/CA composites, which can be applied to future aerospace utilizations, electronic protectors, robotic elements, and permeable membranes.
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Collections - College of Engineering > Department of Mechanical Engineering > 1. Journal Articles
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