The impact of degumming conditions on the properties of silk films for biomedical applications

Allardyce, Benjamin, Rajkhowa, Rangam, Dilley, Rodney J., Atlas, Marcus D., Kaur, Jasjeet and Wang, Xungai 2016, The impact of degumming conditions on the properties of silk films for biomedical applications, Textile research journal, vol. 86, no. 3, pp. 275-287, doi: 10.1177/0040517515586166.

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Title The impact of degumming conditions on the properties of silk films for biomedical applications
Author(s) Allardyce, BenjaminORCID iD for Allardyce, Benjamin
Rajkhowa, RangamORCID iD for Rajkhowa, Rangam
Dilley, Rodney J.
Atlas, Marcus D.
Kaur, Jasjeet
Wang, XungaiORCID iD for Wang, Xungai
Journal name Textile research journal
Volume number 86
Issue number 3
Start page 275
End page 287
Total pages 13
Publisher Sage Publications
Place of publication London, Eng.
Publication date 2016-02
ISSN 0040-5175
Keyword(s) materials
Summary The degumming process to remove sericin decreases silk fiber strength; however, the impact of degumming on the mechanical properties of regenerated silk biomaterials has not been established. This study investigated the effect of degumming temperature, time, alkaline component and alkaline concentration on the mechanical properties of silk fibroin films. Sericin removal was estimated using weight loss; 10 samples with 12.2–29.4% weight loss were then further characterized in terms of fiber mechanical properties, fiber surface morphology, molecular weight distribution and film tensile strength. A negative correlation was found between weight loss and fiber tensile strength. This loss of fiber strength under harsher degumming conditions had a direct impact on the tensile strength of regenerated films. Mild degumming conditions (weight loss of 12.2%) led to higher film strength (8.9 MPa), whereas aggressive degumming conditions (with 29.4% weight loss) resulted in significantly weaker films (4.3 MPa). The presence of some residual sericin, after mild degumming, is likely to affect the mechanical properties of the regenerated silk films. These results will assist in the development of materials with mechanical and biocompatibility properties tuned to specific biomedical applications.
Language eng
DOI 10.1177/0040517515586166
Field of Research 091012 Textile Technology
091205 Functional Materials
Socio Economic Objective 860403 Natural Fibres, Yarns and Fabrics
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2016, Tha Authors
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