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Polymers 2018, 10(6), 637; https://doi.org/10.3390/polym10060637

Facile Preparation of Highly Stretchable and Recovery Peptide-Polyurethane/Ureas

1,2,†
,
2,†
and
2,*
1
Key Laboratory of Marine Materials and Related Technologies, Key Laboratory of Marine Materials and Protective Technologies of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
2
Institute of Textiles & Clothing, The Hong Kong Polytechnic University, Hong Kong 999077, China
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Received: 7 May 2018 / Revised: 4 June 2018 / Accepted: 5 June 2018 / Published: 8 June 2018
(This article belongs to the Special Issue Protein Biopolymer)
View Full-Text   |   Download PDF [4082 KB, uploaded 8 June 2018]   |  

Abstract

In this work, a new class of highly stretchable peptide-polyurethane/ureas (PUUs) were synthesized containing short β-sheet forming peptide blocks of poly(γ-benzyl-l-glutamate)-b-poly(propylene glycol)-b-poly(γ-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 γ-benzyl-l-glutamate-N-carboxyanhydrides (BLG-NCA), which shows mixed α-helix and β-sheet conformation, where the percent of β-sheet structure was above 48%. Morphological studies indicate that the obtained PUUs show β-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. View Full-Text
Keywords: polyurethane/urea; poly(γ-benzyl-l-glutamate); β-sheet conformation; shape recovery polyurethane/urea; poly(γ-benzyl-l-glutamate); β-sheet conformation; shape recovery
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Gu, L.; Jiang, Y.; Hu, J. Facile Preparation of Highly Stretchable and Recovery Peptide-Polyurethane/Ureas. Polymers 2018, 10, 637.

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