Journal
FRONTIERS IN MATERIALS
Volume 7, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fmats.2020.00138
Keywords
spider silk; piriform silk; attachment disc; mechanical properties; nanoindentation
Categories
Funding
- Australian Research Council [DE190101338]
- European Commission [732344, 863179]
- Italian Ministry of Education, University and Research (MIUR) under the Departments of Excellence [L. 232/2016]
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Spiders are able to produce different types of silk with different mechanical and biological properties. Piriform silk is produced to secure spiders and their webs to surfaces by using a nano-fibril network embedded in a cement-like matrix. Despite their fundamental role, the mechanical properties and function of these anchorages are still poorly understood due to the practical difficulties in nano-fibril sample preparation, the complexity of the system, and the high variation of attachment disc structures. Here we estimated the mechanical properties of this nano-fibril silk and those of the whole silk membrane in the large wandering spiderCupiennius saleithrough a combination of nanoindentation and nanotensile techniques and with the support of a simple analytical model. The results highlight the mechanical properties of the piriform silk, facilitating the modeling of silk composite mechanics. This could inspire the design of more efficient bio-inspired adhesives and fabrics.
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