Can nature's design be improved upon? High strength, transparent nacre-like nanocomposites with double network of sacrificial cross links.
نویسندگان
چکیده
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: sigmaUTS approximately 150 MPa and E' approximately 13 GPa. Further introduction of ionic bonds into the polymeric matrix creates a double network of sacrificial bonds which dramatically increases the mechanical properties: sigmaUTS approximately 320 MPa and E' approximately 60 GPa.
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ورودعنوان ژورنال:
- The journal of physical chemistry. B
دوره 112 46 شماره
صفحات -
تاریخ انتشار 2008