Research On Extracting From The Dioscorea Cirrhosa And The Application In The Dyeing On Silk And Cotton Fabric

Extracting pigment from Diosorea Cirrhosa had been studied in the thesis,the best conditions of extracting were as follows: using 70%CH3COCH3, the ratio of solvent and solute 1:5,temperature 60℃and lasting for 3 hours. And the stability of pigment extracted from Diosorea Cirrhosa had also been researched including photostability, thermostability, pH, the existence of a variety of metal ion, the results show that: the pigment must be preserved without lights as the matter of poor photostability, it is stable under the condition of 70℃and neutral, it can maintain stability with the existence of Fe2+ and Zn2+, but it is impacted greatly with Ti4+.The pigment which was extracted from Diosorea Cirrhosa was used to dye silk and cotton fabric, the best dyeing process was obtained according to K/S, L*,a*,b*,and the dyeing fastness was tested. The better dyeing performance was obtained with pad dyeing, using Fe2+ as the mordant, but it was not with Al3+.The washing and rubbing fastness of dyed fabrics meet the basic requirement. The treatment brought varying degrees of impact to the uv-resistant, comfort and physical properties of the fabric, the dyed fabrics were tested by scanning electron microscope and energy spectrum x-diffraction, it was found that the dyeing processing scarcely influenced the inner structure of silk and cotton.