Effect of Low Temperature Plasma Treatment on Color of Wool and Nylon 6 Fabrics Dyed with Natural Dyes

Abstract

In a previous article, we reported that oxygen low temperature plasma treatment of wool fibers increases both the dyeing rate and saturation dye exhaustion of acid dyes, despite increased electronegativity of the fiber surface with the treatment. In this article, wool and nylon 6 fabrics treated with oxygen, carbon tetrafluoride, and ammonia low temperature plasmas are dyed with several natural dyes, such as cochineal, Chinese cork tree, madder, and gromwell. The dyeing rate of the plasma-treated wool increases con siderably with cochineal, Chinese cork tree, and madder, but not with gromwell. How ever, the dyeing rate of nylon 6 with cochineal and Chinese cork tree is not changed by the plasma pretreatment. Furthermore, plasma-treated wool fabrics dyed with cochineal and Chinese cork tree have increased brightness compared with untreated wool.

Influence of Corona Plasma Treatment on Polypropylene and Polyamide 6.6 on the Release of a Model Drug

“…Low-temperature plasma treatment is an effective technique for modifying polymer surfaces [1][2][3][4][5][6][7][8][9]. Plasma techniques are attractive for several reasons: they allow modification of the surface layers up to a depth of several nanometers of the substrate while maintaining its bulk properties.…”

“…Until today, plasma technology has been studied in the textile field for relatively conventional applications; in particular to increase wettability of wool fabrics [12][13][14][15], and to improve their shrink resistance [16,17], to produce water repellent fabrics by means of CF 4 plasma [18], or to improve adhesive properties of both natural and synthetic fabrics; [19,20] in dyeing processes to increase the color intensity of the fibres [21] or the dyeing kinetics [2,[22][23][24].…”

Improving Functional Characteristics of Wool and Some Synthetic Fibres

“…However, Plasma technologies still find difficulties in being widely accepted by the textile industry [56]. Plasma grafting is grafting of molecules on the material surface after Plasma activation [57].…”

Studies Regarding the Increase in Hydrophilicity of Some Textile Fabrics through Treatment by Cold Plasma and Grafting with Vinyl Monomers

“…Besides oxygen, the variety of gases used as a plasma medium and as sources of active species is wide, including: air, nitrogen, hydrogen and inert gases [7][8][9].…”