Abstract:

The effect of high temperature and pressure supercritical state on mechanical properties of wool fiber was detected in the engineering dyeing processing using supercritical carbon dioxide. In the paper, wool fibers were dyed in supercritical carbon dioxide with Reactive Disperse Red G. Effects of different dyeing temperature, pressure, as well as time on the evolution behavior of mechanical properties were studied. The results showed that the K/S values and the short fiber content of wool were increased with the incerase of dyeing temperature and time while the breaking strength and the elongation at break were decreased with the increasing of dyeing temperature, pressure, as well as time. Moreover, the color fastness to rubbing and soaping reached 4 grade or more after dyeing, and the surface morphology of the wool fibers before and after dyeing were also measured as well.

Key words: wool, dyeing, supercritical carbon dioxide, engineering production, mechanical property