Journal
JOURNAL OF THE TEXTILE INSTITUTE
Volume 113, Issue 10, Pages 2080-2089Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/00405000.2021.1964766
Keywords
Sericin; silk; degumming; A; assamenis; P; ricini
Categories
Funding
- Australian Research Council
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This study extracted and characterized sericin from two non-mulberry silks using only water, comparing them with Bombyx mori silk. The research suggests that high temperature water-based processing can potentially be used for chemical-free degumming of silk fibers to obtain high molecular weight sericin for various biomaterial applications.
In this study we report the extraction and characterization of sericin using water alone, from two non-mulberry silks - Antheraea assamensis (A. assamensis) and Philosamia ricini (P. ricini) compared with Bombyx mori (B. mori) silk. Degumming at 130 degrees C offered the highest sericin removal for A. assamensis; P. ricini had the lowest sericin removal among the varieties, because of its lower overall sericin content. Along with sericin degumming, fiber tensile properties were also reported. Sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) of sericin revealed minimal sericin degradation even for degumming temperatures above 100 degrees C. The spectra from Fourier Transform Infrared Spectroscopy (FTIR) confirmed random coil motifs for B. mori sericin but a higher proportion of beta-sheets in A. assamensis and P. ricini sericin which is likely to contribute to their lower water solubility. Thus, high temperature, water-based processing can be a potential approach for chemical- free degumming of silk fibers and to obtain high molecular weight sericin for different biomaterial applications.
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