Multifunctional Cocoon Silk Prepared by Plasma Treatment

Cocoon silks are composed of two silk proteins: sericin and fibroin. Fibroin is a semi crystalline polymer of natural fibrous protein mainly consisting of highly β-sheet crystals and noncrystalline part (micro voids and amorphous structures). Sericin is amorphous acting as an adhesive binder to maintain the fine filaments of fibroin core and the overall structural integrity of cocoon [1]. Silk fibers are one of most important materials extensively used in textile industry. Due to different degumming process in silk processing from cocoons to the finished products, cocoon silks are divided into different types, such as fresh cocoon silk (FS) and dry cocoon silk (DS). Since degumming imposes a relative harsh environment on cocoon silk, the possibility of changes occurring in silk microstructure and mechanical properties etc. have been considered [2].