Nanopillar Templating Augments the Stiffness and Strength in Biopolymer Films

Autor:	Sara Heedy, Juviarelli J. Pineda, Vijaykumar S. Meli, Szu-Wen Wang, Albert F. Yee
Rok vydání:	2022
Předmět:	Chitosan Biopolymers Cartilage Nanofibers General Engineering Animals General Physics and Astronomy Hydrogels General Materials Science
Zdroj:	ACS Nano. 16:3311-3322
ISSN:	1936-086X 1936-0851
Popis:	Natural load-bearing mammalian tissues, such as cartilage and ligaments, contain ∼70% water yet can be mechanically stiff and strong due to the highly templated structures within. Here, we present a bioinspired approach to significantly stiffen and strengthen biopolymer hydrogels and films through the combination of nanoscale architecture and templated microstructure. Imprinted submicrometer pillar arrays absorb energy and deflect cracks. The produced chitosan hydrogels show nanofiber chains aligned by nanopillar topography, subsequently templating the microstructure throughout the film. These templated nanopillar chitosan hydrogels mechanically outperform unstructured flat hydrogels, with increases in the moduli of ∼160%, up to ∼20 MPa, and work at break of ∼450%, up to 8.5 MJ m
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e50ec68ff5c62c50a2cfc3de7d479075 https://doi.org/10.1021/acsnano.1c11378 Zobrazit plný text záznamu