Treatment On Silk Fabric With Dioscorea Cirhosa Extract And Tannin

The dioscorea cirhosa extract was obtained with 80% ethanol as solvent in the ratio of solvent and solute 20:1 at 60℃for 120 min. The stability of the dioscorea cirhosa extract and tannin were studied under different temperature, pH value, respectively.The optimum craft technology of dioscorea cirhosa extract weighting silk in water bath were obtained by discussing the impact factors one by one, which was as follows: solid content 3.14%, liquor ratio 1:60, time 120 min, temperature 80℃and pH=3.3, the highest weighting was about 14% under the condition. The results demonstrated that about 26% of weighting with dioscorea cirrhosa extract by steaming could be obtained under following condition: the steaming temperature was 110℃, humidity was 85%, cycles were 8, the time was 4 min, the mangle expression was 180% and solid content 6.28%. Comparing with dioscorea cirrhosa extract, the best weighting process with tannin by steaming was obtained according to the concentration of tannin 150% (owf.), temperature 110℃, the mangle expression 120%, time 4min, liquor ratio 1:50 and 6 of cycles, where the highest weighting was 10%.Two metal ions were applied to the post treatment together based on the treatment of the variety of single metal ions, in order to obtain the brilliant black color of traditional Xiangyunsha. The results showed that the post treatment diversified color, fastness and ultraviolet-shielding ability. Complex metal ions have big influence on silk fabric. Moreover, the fabric treated with the dioscorea cirhosa extract was affected more seriously than that treated with tannin. The analysis of FT-IR and X-ray diffraction indicated that the treatments scarcely influenced the inner structure of silk.