| abstract |
PROBLEM TO BE SOLVED: To provide a fibroin sponge body having a uniform structure excellent in performance of quickly absorbing liquid such as water dripped or adhered to the surface. A fibroin sponge comprising a surface layer made of a fibroin sponge and a sponge portion in contact with the back surface of the surface layer, wherein the sponge portion is made of a fibroin sponge having a coarser porous structure than the surface layer. It is a sponge body, obtained by drying a hydrogel body obtained by storing a fibroin solution containing fibroin, a water-soluble organic solvent and water in a container, and freezing and thawing to a temperature of less than −5 ° C., A method for producing a fibroin sponge body, wherein the container has an inner wall made of a metal material having a thermal diffusion coefficient smaller than 1.0 × 10 −6, and a porous surface layer is formed on the surface of the inner wall. is there. [Selection] Figure 1 |