Method for producing high molecular weight silk fibroin aqueous solution and method for producing high molecular weight silk fibroin powder

摘要

To provide a method for producing a high molecular weight silk fibroin aqueous solution having excellent storage stability.SOLUTION: The neutral salt dissolving step of dissolving refined silk fibroin raw material in a neutral salt aqueous solution to obtain a silk fibroin / neutral salt aqueous solution, desalting said silk fibroin / neutral salt aqueous solution, adding an aqueous solution of silk fibroin A heating step of heating the silk fibroin aqueous solution at 65 to 110 C. for 30 to 60 minutes, a cooling step of rapidly cooling the silk fibroin aqueous solution heated in the heating step to 15 C. or less, And a microfiltration step of filtrating the silk fibroin aqueous solution cooled in the cooling step with a microfiltration membrane.BACKGROUND OF THE INVENTION