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Assessing the influence of silkworm cocoon’s age on the physicochemical properties of silk fibroin-based materials

Published online by Cambridge University Press:  03 May 2019

Silvia Marisol Valles Ramirez
Affiliation:
School of Chemical Engineering, Department of Materials and Bioprocess Engineering, University of Campinas, Campinas, SP 13083-852, Brazil
Mariana Agostini de Moraes
Affiliation:
Environmental, Chemical and Pharmaceutical Sciences Institute, Department of Chemical Engineering, Universidade Federal de São Paulo, Diadema, SP 09913-030, Brazil
Marisa Masumi Beppu*
Affiliation:
School of Chemical Engineering, Department of Materials and Bioprocess Engineering, University of Campinas, Campinas, SP 13083-852, Brazil
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

The novelty of this study was to investigate for the first time in literature the influence of Bombyx mori silkworm cocoon’s age on the properties of silk fibroin-based materials, during all stages of cocoon processing to obtain the fibroin film. The study started with the premise that the cocoon age could cause modifications on fibroin properties during processing and, consequently, a possible interference on the characteristics of the final product. Characterizations were performed using batches of cocoons produced in different years, named C0 (fresh cocoons) and C6 (six-year-old cocoons). The influence of cocoon’s aging was observed on dialyzed dispersion regarding the molecular weight, particle size, and conformation. C6 films showed a more crystalline structure and higher thermal resistance than C0 films. The findings reported in this work are relevant for the reproducibility of fibroin-based materials, and the cocoon age is a key factor that should be considered in the preparation of fibroin-based materials.

Type
Article
Copyright
Copyright © Materials Research Society 2019 

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