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The authors studied the effect of capacitively coupled radio-frequency (RF) discharge at low pressure on cotton fiber. It is shown that non-cellulose impurities of cotton fiber are removed during processing: the content of extracted substances is reduced by 22-70% depending on the type of solvent when using air, by 5-6% – when using argon. The surface of the fibers becomes hydrophilic, additional submicroscopic pores appear, the roughness increases 1.6 times, water absorption increases 1,5-1,8 times. Discontinuous knitted fabric dyeing was carried out varying the concentration of the active dyes (remasol) in the dye-bath. It was found that the sorption capacity of cotton fibers in relation to the dye increases on average 1.1-1.25 times. To achieve the required color intensity of plasma pre-treated samples dye concentration on average 10-30% less than in the controlled dyeing is needed. The concentrations of dyes that allow obtaining the same intensity of color for the knitted fabric prepared in different ways are selected.

The influence of the capacitive coupled radio-frequency discharge on cotton fiber and technological effects of its application