Rheology and microstructural studies of regenerated silk fibroin solutions

作者:Nisal Anuya*; Kalelkar Chirag; Bellare Jayesh; Lele Ashish
来源:Rheologica Acta, 2013, 52(10-12): 833-840.
DOI:10.1007/s00397-013-0723-5

摘要

Regenerated silk fibroin solutions (RSF) are produced by dissolving degummed silk fibers in water. We have observed that RSF solutions at a concentration less than 15 % by weight exhibit an unusual gel-like response in conventional shear rheology measurements. At higher concentrations, the response is predominantly viscous (or liquid-like). We have probed this counterintuitive behavior of silk fibroin solutions by using microrheology, and interfacial rheometry. Scattering techniques were also used to understand the microstructure of RSF solutions as a function of the concentration. Our studies suggest that the gel-like response of the RSF solution may result from the formation of an interfacial film at the air-solution interface, which dominates the bulk rheological response.

  • 出版日期2013-11