Research On The Modification Upon Silk Fibers Treated By Calcium Salt And Plasma

With the development of science technology, the relation between subjects becomes tight. The modification upon silk fibers by new technology and to develop functional silk fiber is an important direction in the silk research fields. Chemical treatment in calcium nitrate solution and oxygen plasma treatment are used to modify mulberry silk in the thesis. The morphology, structure and mechanical properties of the silk fiber treated by the above two methods are studied.Test methods such as ATR(attenuated total reflectance), IR transmission method, Raman spectroscopy, DSC(Differential scanning calorimeter), X-ray diffraction are used to investigate the assemble structure of the modified silk materials. And its microstructure is observed by SEM(Scanning Electronic microscopy). Stannic acid is used to characterize the microvoids in the silk fibers and the mechanical properties of modified silk fibers are also tested in the paper. The microvoids in the silk fiber increases and the fibers swell and split so the fill ability of stannic acid increased. The breaking strength decreases with the time and temperature treated in the calcium solution. There appears concave upon the surface of the silk fiber treated by the oxygen plasma and the structure will revert if the treated silk sample placed in the air for a while.