Mechanical characterization of spider silk inspired peptide-containing hybrids

Lin Gu, Yuanzhang Jiang, Larry M.C. Chow, Zhen Liu, Wei Gao, Yanting Han, Cong Wang, Jinlian Hu

Research output: Journal article publicationReview articleAcademic researchpeer-review

4 Citations (Scopus)

Abstract

Spiders can produce different types of silks with different functions by tuning the hierarchical structure of spidroin. Inspired by the secondary structure of spider silk, a series of peptide-polyurethane/urea (PUU) hybrids with various peptide contents were synthesized in this work. By effective control of polymerization degree, simultaneous presence of α-helixes and β-sheets in the polymer was realized. The modulus of films increased with peptide loading and reached more than 200 MPa at 71.1% peptide content. Notably, the PUU hybrid with 41.5% peptide content (P-41.5) showed the highest tensile strength (6.6 MPa) and strain (1238%). At the same time, this film (P-41.5) exhibited shape memory effect at 37 °C, as well as excellent shape recovery ratio during successive cycles at 100% strain. Furthermore, Ag nanowires/P-41.5 hybrid film exhibited superb electric resistance stability under bending and stretching conditions, making it a promising material for strain sensors.

Original languageEnglish
Article number110761
JournalMaterials and Design
Volume219
DOIs
Publication statusPublished - Jul 2022

Keywords

  • Electric resistance stability
  • Polyurethane/urea
  • Shape recovery
  • Spider silk inspired

ASJC Scopus subject areas

  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering

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