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Issue 17, 2018, Issue in Progress
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Ice-regenerated flame retardant and robust film of Bombyx mori silk fibroin and POSS nano-cages

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Abstract

In this study, we present a simple method to prepare and control the structure of regenerated hybrid silkworm silk films through icing. A regenerated hybrid silk (RHS) film consisting of a micro-fibrillar structure was obtained by partially dissolving amino-functionalized polyhedral oligomeric silsesquioxanes (POSS) and silk fibers in a CaCl2–formic acid solution. After immersion in water and icing, the obtained films of RHS showed polymorphic and strain-stiffening behaviors with mechanical properties that were better than those observed in dry or wet-regenerated silk. It was also found that POSS endowed the burning regenerated silk film with anti-dripping properties. The higher β-sheet content observed in the ice-regenerated hybrid micro-fibrils indicates a useful route to fabricate regenerated silk with physical and functional properties, i.e. strain-stiffening, similar to those observed to date in natural spider silk counterpart and synthetic rubbers, and anti-dripping of the flaming melt. Related carbon nanotube composites are considered for comparison.

Graphical abstract: Ice-regenerated flame retardant and robust film of Bombyx mori silk fibroin and POSS nano-cages

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Publication details

The article was received on 28 Dec 2017, accepted on 13 Feb 2018 and first published on 28 Feb 2018


Article type: Paper
DOI: 10.1039/C7RA13708G
Citation: RSC Adv., 2018,8, 9063-9069
  • Open access: Creative Commons BY license
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    Ice-regenerated flame retardant and robust film of Bombyx mori silk fibroin and POSS nano-cages

    L. Valentini, S. Bittolo Bon and N. M. Pugno, RSC Adv., 2018, 8, 9063
    DOI: 10.1039/C7RA13708G

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