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<p>The conformation of polypeptides is an important factor determining their properties including solubility. In this study, an infrared study has been carried out to explore the effects of primary amine-initiated <i>N</i>-carboxyanhydride polymerization conditions on the secondary structure of a synthetic hairy-rod copolypeptide. The helix/β-sheet content ratio could by manipulated significantly by monitoring these synthesis factors to satisfy a proper balance between the solubility of formed oligomers and the polymerization rate. Blends between the copolypeptide with 93% of helix content with a polyurethane (PU) matrix were fabricated and their ability to self-repair scratches were evaluated. Attributed to the combined effects of shape-recovery, interdiffusion and complementary hydrogen bonding, full scratch healing was obtained at 90&#xa0;°C after 24&#xa0;h for the 15 wt% copolypeptide/PU blend.</p>

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Regulating secondary structure of hairy-rod copolypeptide toward self-repairing material application

  • 期刊论文

  • 发表日期：

    2025年5月29日

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  • Thuy Thu Truong,
  • Ha Tran Nguyen,
  • Le-Thu Thi Nguyen

摘要

The conformation of polypeptides is an important factor determining their properties including solubility. In this study, an infrared study has been carried out to explore the effects of primary amine-initiated N-carboxyanhydride polymerization conditions on the secondary structure of a synthetic hairy-rod copolypeptide. The helix/β-sheet content ratio could by manipulated significantly by monitoring these synthesis factors to satisfy a proper balance between the solubility of formed oligomers and the polymerization rate. Blends between the copolypeptide with 93% of helix content with a polyurethane (PU) matrix were fabricated and their ability to self-repair scratches were evaluated. Attributed to the combined effects of shape-recovery, interdiffusion and complementary hydrogen bonding, full scratch healing was obtained at 90 °C after 24 h for the 15 wt% copolypeptide/PU blend.