Cationization of cotton with ovalbumin to improve dyeing of modified cotton with cochineal natural dye

Abstract

Natural dyeing of cotton is commonly associated with the use of metallic mordants, which are related to harmful effects on the environment and human health. For this reason, more environmentally sustainable processes should be investigated. In this work, cotton was cationized with ovalbumin by cross-linking in order to improve its dyeing with natural cochineal dye. Different pretreatments with chitosan, synthetic cationizer, and metal mordants were also carried out at different dyeing pH values. The best dyeing results were obtained at pH 3 at 55℃ on fiber pretreated by padding with a liquor concentration of 150 g L−1 ovalbumin and 90 g L−1 cross-linker. This cationization of ovalbumin by cross-linking was confirmed by Fourier transform infrared spectroscopy, energy dispersive X-ray spectroscopy, changes in the isoelectric point of the fabrics, and scanning electron microscopy. The kinetic study showed that the pseudo second-order model best represented the experimental data, indicating that the dyeing can be controlled by the chemisorption process. The equilibrium data were easily adjusted by the Langmuir model, indicating the formation of a dye monolayer in the cationized cotton. The thermodynamic study indicated that dye adsorption was spontaneous and exothermic. The cationized fabric with ovalbumin presented low wash fastness, good light fastness, and increase in tensile strength and crease recovery, with a decrease of hydrophilicity when compared with other treatments. Thus, ovalbumin is a viable and eco-friendly alternative in the dyeing of cotton with cochineal.

Preparation of cationic cotton through reaction with different polyelectrolytes

“…Chitosan, a biopolymer derived from chitin, is an example of a possible natural substitute for cationization of cotton as it has been studied by many researchers (Chattopadhyay 2001 ; Ibrahim et al 2010 ; Oliveira et al 2017 ; Sadeghi-Kiakhani and Safapour 2018 ; Pan et al 2020 ). Other studies include keratin, betaine, and ovalbumin as natural cationic agents (Arivithamani et al 2014 ; Ma et al 2016 ; Giacomini et al 2020 ).…”

Surface functionalization of greige cotton knitted fabric through plasma and cationization for dyeing with reactive and acid dyes

“…The greige cotton knitted fabric (160 gsm) was purchased from Pemgir Malhas (Brazil). Cotton was used because it is the most common cellulosic ber in the world (Giacomini et al 2020 2) were supplied from Color Química (Brazil). Ecodyeing A 230, Ecodyeing IR 4, Stabplex EP 243 and RW 710 were respectively used as non-ionic detergent, leveling agent, peroxide stabilizer and anionic detergent and were also supplied from Werken Química.…”

“…To minimize occupational and environmental exposure, the cationization process must be designed so that all EPTAC is reacted with the cellulose or converted to its inactivated form of diol (Arivithamani and Giri Dev 2016). Therefore, many researchers focused on the application of novel and safer cationic agents (Arivithamani et al 2014;Sahito et al 2015;Giacomini et al 2020).…”

Rapid Adsorption of Acid Dyes Using Cu(II) Thiourea Modified Cellulose Complex

“…The high affinity of the modified cotton fiber is due to the presence of cationic copper ions in the cotton which improved the binding of the dyes to the fiber, increasing the wash fastness and this is consistent with recently published papers. [41,42] 1-The morphological appearance of the fibers was visualized by SEM and the effect of treatment was detected.…”

“…Thus, the removal of these contaminations from the ecosystem became an urgent need to maintain the limited freshwater sources for human consumptions. For these reasons, novel separation techniques such as membranes, solid-phase extraction, ion exchangers, and precipitation are continuously developed to be effectively utilized in the removal of different pollutants from the different aquatic effluent [7][8][9][10]. Solid-phase extraction using various adsorbent materials such as polymeric resins, polysaccharides, and active carbon is considered as one of the most efficient and economic techniques extensively utilized for the removal of different pollutants from aqueous media [11][12][13][14][15].…”