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http://hdl.handle.net/10397/79082
Title: | Facile preparation of highly stretchable and recovery peptide-polyurethane/Ureas | Authors: | Gu, L Jiang, YZ Hu, JL |
Issue Date: | 2018 | Source: | Polymers, June 2018, v. 10, no. 6, 637 | Abstract: | In this work, a new class of highly stretchable peptide-polyurethane/ureas (PUUs) were synthesized containing short -sheet forming peptide blocks of poly(-benzyl-l-glutamate)-b-poly(propylene glycol)-b-poly(-benzyl-l-glutamate) (PBLG-b-PPG-b-PBLG), isophorone diisocyanate as the hard segment, and polytetramethylene ether glycol as the soft phase. PBLG-b-PPG-b-PBLG with short peptide segment length (<10 residues) was synthesized by amine-initiated ring opening polymerization of -benzyl-l-glutamate-N-carboxyanhydrides (BLG-NCA), which shows mixed -helix and -sheet conformation, where the percent of -sheet structure was above 48%. Morphological studies indicate that the obtained PUUs show -sheet crystal and nanofibrous structure. Mechanical tests reveal the PUUs display medium tensile strength (0.25-4.6 MPa), high stretchability (>1600%), human-tissue-compatible Young's modulus (226-513 KPa). Furthermore, the shape recovery ratio could reach above 85% during successive cycles at high strain (500%). In this study, we report a facile synthetic method to obtain highly stretchable and recovery peptide-polyurethane/urea materials, which will have various potential applications such as wearable and implantable electronics, and biomedical devices. | Keywords: | Polyurethane Urea Poly(-benzyl-l-glutamate) -sheet conformation Shape recovery |
Publisher: | Molecular Diversity Preservation International (MDPI) | Journal: | Polymers | ISSN: | 2073-4360 | DOI: | 10.3390/polym10060637 | Rights: | © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). The following publication Gu, L., Jiang, Y., & Hu, J. (2018). Facile Preparation of Highly Stretchable and Recovery Peptide-Polyurethane/Ureas. Polymers, 10(6), 637 is available at https://doi.org/10.3390/polym10060637 |
Appears in Collections: | Journal/Magazine Article |
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