Plasma activation and chitosan attachment on cotton and wool for improvement of dyeability and fastness properties

Abstract

Purpose The dyeing of cellulosic and proteinous fibers with natural and synthetic colorants usually needs large amounts of metal salts to promote the dyeing procedure. To get rid of the necessity to use metal salts, plasma treatment and subsequent attachment of chitosan biopolymer were considered as green processes for surface functionalization of wool and cotton. The purpose of this paper is to investigate the effect of oxygen plasma treatment and attachment of chitosan on the dyeability of wool and cotton fabrics using walnut and weld as model natural dyes, as well as C.I. reactive blue 50 and C.I. acid blue 92 as model synthetic dyes. Design/methodology/approach Wool and cotton fabrics were modified with oxygen plasma and coated with chitosan solution. The un-modified and modified samples were dyed with the above-mentioned dyes under constant conditions. The color strength, color coordinates and fastness properties of the dyed samples were determined and compared. Findings The results showed that oxygen plasma treatment could improve the dyeability and fastness properties of wool and cotton fibers when dyed with all of the above-mentioned dyes. Attachment of chitosan to the plasma-treated samples significantly improved the dyeability of wool and cotton fibers with walnut, acid and reactive dyes. The fastness properties of the dyed samples were enhanced by plasma treatment and chitosan coating. Originality/value This study uses plasma treatment as an environmentally friendly pre-treatment for attachment of chitosan on wool and cotton. This process improved the dyeing properties of both fibers. The use of metal salts in not needed for dyeing of wool and cotton according to the investigated process.

Natural Dyeing of Modified Cotton Fabric with Cochineal Dye

“…There are more recent papers concerning the improvement of cotton natural dyeing by plasma, ultrasound, gamma ray irradiation, chitosan, cationic agents, which can help to reduce the addition of mordant and/or electrolyte in the dyeing bath [ 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 ]. Haji et al studied plasma treatment and subsequent attachment of chitosan biopolymer for surface functionalization of wool and cotton [ 37 , 38 ], and Peran et al [ 36 ] on wool. Plasma treatment functionalized surface and cationic chitosan contributed to improved dyeability with natural dyes.…”

“…Plasma treatment functionalized surface and cationic chitosan contributed to improved dyeability with natural dyes. Application of cationic agents, including full cationization of cotton, leads to salt-free dyeing [ 36 , 37 , 38 ]. Haddar et al [ 33 , 34 ] used three commercial cationic agents, Croscolor DRT, Croscolor CF, and Stabifix NCC, for cationization as pretreatment to the dyeing process.…”

Chemical-Free Dyeing of Cotton With Functional Natural Dye: A Pollution-Free and Cleaner Production Approach

“…In another study, chitosan was used to enhance the dyeability of cotton fibers before the application of reactive dyes (Rehman et al, 2020). In a recent study, chitosan was used for surface functionalization of cotton and wool that improved fastness properties and dyeability for reactive, acid and walnut dyes (Haji, 2020). The cotton surface was functionalized with N + (CH 3 ) 3 groups using poly[styrene-butyl acrylate-(P-vinylbenzyl trimethyl ammonium chloride)] nanospheres for dyeing with reactive dyes.…”

Environmentally Benign Dyeing of Polyester Fabric with Madder: Modelling by Artificial Neural Network and Fuzzy Logic Optimized by Genetic Algorithm

“…Natural dyes are considered as safer and eco-friendlier substitutes to synthetic dyes and are usually applied on natural protein fibers such as wool and silk [1][2][3][4][5]. Different techniques such as metal-mordanting [6,7], bio-mordanting [8,9], enzyme treatment [10], plasma treatment [11][12][13], chitosan treatment [14,15], ultrasonic radiation [16,17], microwave heating [18,19] have been employed for the improvement of natural dyeing of wool fibers. Metal mordanting is the traditional method which is widely used for increasing the exhaustion and color strength of natural dyes on wool and silk.…”