Abstract:

Skin dander included in the cashmere seriously affected the quality of textiles. Pepsin method and restore method were used to extract collagen and keratin from cashmere skin dander, and its characterization was conducted. The results showed that cashmere skin dander is consisting 9.14% of moisture, 8.72% of fat,  11.36% of soluble solids, 60.13% of crude protein and 10.65% of ash, collagen and keratin protein accounts for 30.98% and 15.67% of the total protein, respectively, which are the major components of protein, the remaining proteins are needed further studied. Molecular weight of collagen from skin dander is concentrated at  49 ku, while the molecular weight of keratin distributes mainly in the rarea of 26 to 35 ku and 49 ku. The distributions of components among skin dander is different, fat and collagen distribute unevenly, while keratin shows a more uniform distribution, and water soluble solids play a major role on skin bonding between flaky skin danders. The findings provide a theoretical basis for addressing dark skin point among cashmere dyeing.

Key words: cashmere, skin dander, collagen, keratin