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Repeat sequence proteins as matrices for nanocomposites

✍ Scribed by Lawrence F. Drummy; Hilmar Koerner; David M. Phillips; Joseph C. McAuliffe; Manoj Kumar; B.L. Farmer; Richard A. Vaia; Rajesh R. Naik

Publisher
Elsevier Science
Year
2009
Tongue
English
Weight
744 KB
Volume
29
Category
Article
ISSN
0928-4931

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✦ Synopsis

Recombinant protein-inorganic nanocomposites comprised of exfoliated Na + montmorillonite (MMT) in a recombinant protein matrix based on silk-like and elastin-like amino acid motifs (silk elastin-like protein (SELP)) were formed via a solution blending process. Charged residues along the protein backbone are shown to dominate long-range interactions, whereas the SELP repeat sequence leads to local protein/MMT compatibility. Up to a 50% increase in room temperature modulus and a comparable decrease in high temperature coefficient of thermal expansion occur for cast films containing 2-10 wt.% MMT.

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