In this study, we present a simple method to prepare and control the structure of regenerated hybrid silkworm silk fi lms through icing. A regenerated hybrid silk (RHS) fi lm consisting of a micro- fi brillar structure was obtained by partially dissolving amino-functionalized polyhedral oligomeric silsesquioxanes (POSS) and silk fi bers in a CaCl 2 – formic acid solution. After immersion in water and icing, the obtained fi lms of RHS showed polymorphic and strain-sti ff ening 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 fi lm with anti-dripping properties. The higher b -sheet content observed in the ice-regenerated hybrid micro- fi brils indicates a useful route to fabricate regenerated silk with physical and functional properties, i.e. strain-sti ff ening, similar to those observed to date in natural spider silk counterpart and synthetic rubbers, and anti-dripping of the fl aming melt. Related carbon nanotube composites are considered for comparison
Ice-regenerated flame retardant and robust film of hybrid Bombyx mori silk fibroin and POSS nano-cages
L. Valentini
Writing – Original Draft Preparation
;S. Bittolo BonMembro del Collaboration Group
;
2018
Abstract
In this study, we present a simple method to prepare and control the structure of regenerated hybrid silkworm silk fi lms through icing. A regenerated hybrid silk (RHS) fi lm consisting of a micro- fi brillar structure was obtained by partially dissolving amino-functionalized polyhedral oligomeric silsesquioxanes (POSS) and silk fi bers in a CaCl 2 – formic acid solution. After immersion in water and icing, the obtained fi lms of RHS showed polymorphic and strain-sti ff ening 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 fi lm with anti-dripping properties. The higher b -sheet content observed in the ice-regenerated hybrid micro- fi brils indicates a useful route to fabricate regenerated silk with physical and functional properties, i.e. strain-sti ff ening, similar to those observed to date in natural spider silk counterpart and synthetic rubbers, and anti-dripping of the fl aming melt. Related carbon nanotube composites are considered for comparisonI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
