Rendering viscose fabric dye-able with anionic dyes using plasma treatment technique and chitosan nanoparticles as an eco-friendly approach

Abstract

Purpose This paper aims at studying the oxygen plasma treatment and the previously prepared and fully characterized chitosan nanoparticles (CNPs) as a green and eco-friendly strategy for surface modification of viscose fabric. This was done to render viscose fabric dye able with two types of acid dyes that do not have direct affinity to fix on it via improving the fabric wettability. Design/methodology/approach To achieve the goal, viscose fabric was activated with oxygen plasma at optimum conditions and coated with different concentrations of CNPs solution via conventional pad dry cure technique. The untreated and plasma-treated fabrics with CNPs were dyed with two types of acid dyes, namely, Acid Orange 7 and Methyl Red under determined conditions. The color strength (K/S), fastness properties to light, rubbing and perspiration, add on %, tensile strength, wettability and durability of the dyed samples were determined and compared. Findings The results divulged that oxygen plasma-treated fabric with CNPs and the aforementioned dyes in question could improve the flowing properties in comparison with untreated fabric: (a) the fabric wettability expressed as wetting area mm2; (b) the dye ability and fastness properties of viscose fabrics expressed as K/S and fastness properties; and (c) the strength properties and add on % of the treated fabric. On the other hand, the durability of the plasma-treated fabric decreased with increasing washing cycles. Originality/value The novelty addressed here was using plasma treatment as an eco-friendly pre-treatment approach for attachment of CNPs as a multifunctional green bio-nano polymer onto viscose fabric, which improved the dyeing properties of the fabric with acid dyes that do not have direct affinity to fix onto it.

Harnessing of low-temperature nitrogen plasma technique as an eco-friendly approach for dye-ability of cotton fabric with acid dye

“…Due to ionic bombardment, the part with less bonding energy and atoms close to it was removed from the surface. Therefore, crackling and etching can reduce the weight and degree of whiteness of the sample (Mostafa, 2022b; Kan, 2014). This is in accordance with other studies that showed the nitrogen plasma treatments reduce the weight in cotton fibers between 1%–6% (Bhat et al , 2011; Bhat et al , 2011) and 0.5% (Nithya et al , 2011), while in case of gray cotton fabrics; the loss ranged between 1.5 and 4% (Wang et al , 2013).…”

“…This is because no hazardous chemicals or poisonous solvents are exploited in the treatment of cotton fabric using nitrogen gas plasma. In this study, and based on our laboratory trials with our colleagues in addition to our recent published works (Mostafa, 2022b), cotton fabrics are activated by the optimum plasma conditions used during the process: the discharged gas pressure, 200 m torr; discharge power, 30 W; and duration, 60 min. The resultant nitrogen plasma-treated fabrics are dyed with different concentration of Acid Blue 284 and the effects of each treatment on color strength (K/S), fastness properties to light, rubbing and perspiration and durability as well as tensile strength, elongation at break, wettability, zeta potential and degree of whiteness of the treated samples were determined and compared with untreated fabric.…”

“…Such activation alters the chemical activity and characteristics of the surface. Plasma treatment with oxygen gas created carbonyl and carboxylic groups and some cross-linking on textile surface (Aboltakhty et al , 2018; Dave et al , 2019; Jazbec et al , 2015; Mostafa, 2022b). Whereas that treated with nitrogen gas introduces N-containing groups on the material surface, including -NH 2 , -NH, =NH, -CONH 2 and -C = N groups (Aboltakhty et al , 2018; Hou and Kan, 2014; Hou et al , 2016).…”