Abstract:

In order to invvestigate the influence of the concentrations of ferrous ions on bleaching of black yak fibers in the treatment process, the properties of fibers at different concentrations of ferrous ions were tested and compared, and in ouder to minimize fiber damage on the premise that the spinnability of black yak fibers were not influenced, the best ferrous ions comcentration had been obtained. The whiteness meter, strength tester, scanning electronic microscopy and other methods had been used to test the surface morphologies and properties of fibers. The result showed that when the concentration of ferrous ions was 12 g/L ,the best decolorization effect of black yak fibers can be got, and the spinnablity of yak fibers was not influenced seriously by the bleaching process.

Key words: yak wool, bleaching, ferrous ion, whiteness, fiber property