Structure And Properties Of Silk Fibers Modified By Collagen Protein

The morphology, aggregation structure and mechanical properties of different kinds of silk (ordinary mulberry silk, slightly dissolved silk and calcium nitrate treated silk) modified by collagen protein solution are studied in this thesis.First, effects induced by treatment temperature, time and concentration of collagen protein solution are studied separately. The optical treatment process technics of silks fibers treated with collagen protein solution is also studied.On the basis of the explored experiments, different concentration solution of collagen protein is used to treat ordinary mulberry silk, slightly dissolved silk and calcium nitrate treated silk separately and the rules are investigated, through the analysis of the morphology, aggregation structure and properties of treated silk fibers.The results show that certain erosion and denudation by collagen protein happened upon the surface of the treated silk fibers. The silk fibers treated by collagen protein have many changes. The inner structure of silk fibers is changed to more compact, and some mechanical properties are improved. At the same time,the conformation has the trend transiting from random coil toβsheet conformation, and thermo-stability of treated silk fibers is also improved.