Journal
JOURNAL OF PHYSICAL CHEMISTRY B
Volume 112, Issue 46, Pages 14359-14363Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp801492n
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Funding
- Air Force Office of Scientific Research [FA9550-05-1-043]
- U.S. Office of Naval Research [N00014-06-1-0473]
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The preparation of a high-strength and highly transparent nacre-like nanocomposite via layer-by-layer assembly technique from poly(vinyl alcohol) (PVA) and Na+-montmorillonite clay nanosheets is reported in this article. We show that a high density of weak bonding interactions between the polymer and the clay particles: hydrogen, dipole-induced dipole, and van der Waals undergoing break-reform deformations, can lead to high strength nanocomposites: sigma(UTS) similar to 150 MPa and E' similar to 13 GPa. Further introduction of ionic bonds into the polymeric matrix creates a double network of sacrificial bonds which dramatically increases the mechanical properties: sigma(UTS) similar to 320 MPa and E' similar to 60 GPa.
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