Enhancement of fracture toughness in organic/inorganic hybrid nanolaminates with ultrathin adhesive layers
- Authors
- Yeom, Bongjun; Jeong, Ahreum; Lee, Jubong; Char, Kookheon
- Issue Date
- May-2016
- Publisher
- ELSEVIER SCI LTD
- Keywords
- Nacre; Organic/inorganic hybrid nanolaminates; Layer-by-layer assembly; Fracture toughness; Interfacial adhesion
- Citation
- POLYMER, v.91, pp.187 - 193
- Indexed
- SCIE
SCOPUS
- Journal Title
- POLYMER
- Volume
- 91
- Start Page
- 187
- End Page
- 193
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/23060
- DOI
- 10.1016/j.polymer.2016.03.078
- ISSN
- 0032-3861
- Abstract
- Nacre is composed of highly ordered organic/inorganic hybrid nanolaminated structures showing exceptional toughness. However, artificial fabrication of such nanoscale layered structures still remains a challenge in the area of nanocomposite films. In this study, we fabricated organic/inorganic hybrid nanolaminated films by using the layer-by-layer (LbL) deposition method, and obtained high fracture toughness by adjusting the interfacial interactions. Artificial composites with an inorganic content of 89.2 vol%-99.1 vol%, comparable to that of nacre, were fabricated via a bottom-up process with assist of the LbL method. In addition, the interfaces between organic/inorganic layers were discretely defined with the interfacial roughness of only 1.9 +/- 1.2 nm, as determined by high-resolution X-ray reflectivity (HR-XRR). More importantly, the insertion of adhesive layers that were only 8 angstrom-thick resulted in a significant increase (291-fold) in the fracture toughness at organic contents of 8-10 vol%. Therefore, tuning of the interfacial interaction has a significant effect on the release of fracture energy in hybrid laminated films.
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