Can Nature's Design be Improved Upon? High Strength, Transparent Nacre-Like Nanocomposites with Double Network of Sacrificial Cross Links. The journal of physical chemistry. B [J Phys Chem B] Journal article | | Title | Can Nature's Design be Improved Upon? High Strength, Transparent Nacre-Like Nanocomposites with Double Network of Sacrificial Cross Links. | | Author(s) | Podsiadlo P, Kaushik AK, Shim BS, Agarwal A, Tang Z, Waas AM, Arruda EM, Kotov NA | | Institution | Departments of Chemical Engineering, Mechanical Engineering, Aerospace Engineering, Biomedical Engineering, and Materials Science and Engineering, and Program in Macromolecular Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109, and National Center for Nanoscience and Technology, Beijing 100080, China kotov@umich.edu. | | Source | J Phys Chem B 2008 Jul 1. | | Abstract | 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 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: sigma UTS approximately 320 MPa and E' approximately 60 GPa. | | Language | ENG | | Pub Type(s) | JOURNAL ARTICLE
| | PubMed ID | 18590319 |
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