and domestic and foreign companies have increased

according to different sources, silk fibroin is divided into two categories: natural silk fibroin and regenerated silk fibroin. regenerated silk fibroin is mainly produced from silkworm cocoons through degumming, dissolution, dialysis, and modification operations. silk fibroin preparation methods include methanol recrystallization method, natural drying and hot pressing molding method, cisco improved methanol recrystallization method, etc.…