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  Biomimetic composites with enhanced toughening using silk-inspired triblock proteins and aligned nanocellulose reinforcements

Mohammadi, P., Aranko, A. S., Landowski, C. P., Ikkala, O., Jaudzems, K., Wagermaier, W., et al. (2019). Biomimetic composites with enhanced toughening using silk-inspired triblock proteins and aligned nanocellulose reinforcements. Science Advances, 5(9): eaaw2541. doi:10.1126/sciadv.aaw2541.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0005-0E45-F Version Permalink: http://hdl.handle.net/21.11116/0000-0005-5F82-E
Genre: Journal Article

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 Creators:
Mohammadi, Pezhman, Author
Aranko, A. Sesilja, Author
Landowski, Christopher P., Author
Ikkala, Olli, Author
Jaudzems, Kristaps, Author
Wagermaier, Wolfgang1, Author              
Linder, Markus B., Author
Affiliations:
1Wolfgang Wagermaier, Biomaterialien, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863296              

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 Abstract: Silk and cellulose are biopolymers that show strong potential as future sustainable materials. They also have complementary properties, suitable for combination in composite materials where cellulose would form the reinforcing component and silk the tough matrix. A major challenge concerns balancing structure and functional properties in the assembly process. We used recombinant proteins with triblock architecture, combining structurally modified spider silk with terminal cellulose affinity modules. Flow alignment of cellulose nanofibrils and triblock protein allowed continuous fiber production. Protein assembly involved phase separation into concentrated coacervates, with subsequent conformational switching from disordered structures into β sheets. This process gave the matrix a tough adhesiveness, forming a new composite material with high strength and stiffness combined with increased toughness. We show that versatile design possibilities in protein engineering enable new fully biological materials and emphasize the key role of controlled assembly at multiple length scales for realization.

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Language(s): eng - English
 Dates: 2019-09-132019
 Publication Status: Published in print
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 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1126/sciadv.aaw2541
BibTex Citekey: Mohammadieaaw2541
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Title: Science Advances
  Other : Sci. Adv.
Source Genre: Journal
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Publ. Info: Washington : AAAS
Pages: - Volume / Issue: 5 (9) Sequence Number: eaaw2541 Start / End Page: - Identifier: ISSN: 2375-2548