Wrinkle resistant finishing of silk by acetylating

This paper studied the wrinkle resistant finishing of silk by partial acetylation.The acetylated silk was characterized by infrared spectrum,X-ray diffraction and DSC.And the wearability was also measured.The results showed that the wrinkle elasticity of the acetylated silk was enhanced by a great margin,with slow and acute crease recovery angles improved from 218.5° to 270.5° and 168.5° to 210.5°,respectively.This suggested that the non-crosslinking finishing agent which only decreases the capacity to form hydrogen bonds can also increase the wrinkle elasticity of silk greatly.Infrared spectral analysis showed that the Beta-sheet structure of the acetylated silk increased and amino group partially acetylated.X-ray diffraction analysis showed that the degree of crystallization of the acetylated silk increased.DSC analysis showed that the acetylated silk′s decomposition temperature and thermal stability increased.At the same time,the moisture regain,whiteness and breaking strength of the acetylated silk exhibited little change,with flexural stiffness improved a little.