Repeat sequence proteins as matrices for nanocomposites

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• 作者：Lawrence F. Drummy ; Hilmar Koerner ; David M. Phillips ; Joseph C. McAuliffe ; Manoj Kumar ; B.L. Farmer ; Richard A. Vaia ; Rajesh R. Naik
• 关键词：Silk ; Elastin ; Clay ; Composites ; Biomaterials
• 刊名：Materials Science and Engineering: C
• 出版年：2009
• 出版时间：5 May 2009
• 年：2009
• 卷：29
• 期：4
• 页码：1266-1272
• 全文大小：743 K

文摘

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.