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Some mechanistic insights into the gelation of regenerated silk fibroin sol / Shailesh Nagarkar in Industrial & engineering chemistry research, Vol. 48 N° 17 (Septembre 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 17 (Septembre 2009) . - pp. 8014–8023 Titre : Some mechanistic insights into the gelation of regenerated silk fibroin sol Type de document : texte imprimé Auteurs : Shailesh Nagarkar, Auteur ; Avinash Patil, Auteur ; Ashish Lele, Auteur Année de publication : 2009 Article en page(s) : pp. 8014–8023 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Sol−gel  transition  Regenerated  silk  fibroin Résumé : We provide some new insights into the kinetics and mechanism of sol−gel transition as it pertains to regenerated silk fibroin, which is the principle structural protein of silkworm silk fiber. Silk fibroin was dissolved in lithium bromide and dialyzed against deionized water to prepare a regenerated fibroin solution. This solution was found to be unstable at lower pH and transformed into a colloidal gel. The kinetics and mechanism of the sol−gel transition were investigated using rheology and light scattering. We show that gelation proceeds in two steps. In the first step, a weak gel is formed almost immediately upon lowering the pH, while in the second step further gelation proceeds rapidly after a long induction time to form a self-similar structure. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801723f [article] Some mechanistic insights into the gelation of regenerated silk fibroin sol [texte imprimé] / Shailesh Nagarkar, Auteur ; Avinash Patil, Auteur ; Ashish Lele, Auteur . - 2009 . - pp. 8014–8023. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 17 (Septembre 2009) . - pp. 8014–8023 Mots-clés : Sol−gel  transition  Regenerated  silk  fibroin Résumé : We provide some new insights into the kinetics and mechanism of sol−gel transition as it pertains to regenerated silk fibroin, which is the principle structural protein of silkworm silk fiber. Silk fibroin was dissolved in lithium bromide and dialyzed against deionized water to prepare a regenerated fibroin solution. This solution was found to be unstable at lower pH and transformed into a colloidal gel. The kinetics and mechanism of the sol−gel transition were investigated using rheology and light scattering. We show that gelation proceeds in two steps. In the first step, a weak gel is formed almost immediately upon lowering the pH, while in the second step further gelation proceeds rapidly after a long induction time to form a self-similar structure. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801723f