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

Pezhman Mohammadi*, A. Sesilja Aranko, Christopher P. Landowski, Olli Ikkala, Kristaps Jaudzems, Wolfgang Wagermaier, Markus B. Linder

*Tämän työn vastaava kirjoittaja

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

16 Sitaatiot (Scopus)
169 Lataukset (Pure)

Abstrakti

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 b 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.

AlkuperäiskieliEnglanti
Artikkelieaaw2541
JulkaisuScience Advances
Vuosikerta5
Numero9
DOI - pysyväislinkit
TilaJulkaistu - 13 syyskuuta 2019
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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