Salt-acid system has been proved to be of high efficiency for silk fibroin
dissolution. Using salt-acid system to dissolve silk, native silk fibrils can
be preserved in the regenerated solution. Increasing experiments indicate
that acquirement of silk fibrils in solution is strongly associated with the
degumming process. In this study, the effect of sodium carbonate degumming
concentration on solution properties based on lithium bromide-formic acid
dissolution system was systematically investigated. Results showed that the
morphology transformation of silk fibroin in solution from nanospheres to
nanofibrils is determined by sodium carbonate concentration during the
degumming process. Solutions containing different silk fibroin structure
exhibited different rheological behaviors and different electrospinnability,
leading to different electrospun nanofibre properties. The results have
guiding significance for preparation and application of silk fibroin
solutions.
Microwave-assisted Depolymerization of Lignin with Metal Chloride in a Hydrochloric Acid and Formic Acid System