Effect of a cationising agent on the conventional reactive dyeing of cotton

Abstract

Cationisation of cotton is emerging as an effective tool that may help to solve the environmental problems associated with the dyeing of cotton with reactive dyes. The efficiency of the cationising agent CA200 has been investigated and was found to be more effective when compared with the usual method for reactive dyeing of cotton. Pretreatment of the cotton fabric with the cationising agent increases the rate of dyeing compared with the existing method of reactive dyeing. The colour yields, in terms of the Kubelka–Munk values as a function of the amount of dye fixed, showed that cationisation enhances the colour strength. It also improves the washing fastness, rubbing fastness and depth of shade. The positive environmental impact of this cationisation process is significant and the cationised cotton shows a similar fabric quality as with the normal dyeing process.

Preparation of the cellulose/silica hybrid containing cationic group by sol–gel crosslinking process and its dyeing properties

“…Several applications have been already developed for this kind of hybrid materials, especially in the field of surface modification of organic and inorganic substrates. The cellulose fiber is one of the excellent natural materials that have wide application in the different technical areas and biomedicine (Hou, Wang, & Wu, 2008;Kulpinski, 2005;Mughhal, Naeem, Aleem, Saeed, & Ahmed, 2008). Besides the traditional use, such as textile materials, cellulose has been explored as a substrate for composite materials because of the presence of several functional groups that may be employed in various activation processes (Fu et al, 2001;Thomas et al, 2008;Xie, Hou, & Sun, 2007.…”

Effect of Radiation on Textile Dyeing

“…reveal that colour strength values decrease with increase in absorbed doses. The more colour strength is because of photo modified surface of cellulose which may have more affinity for dye substrate (Mughal et al, 2007). The results show that the dyeing performed using 200Gy dose gives maximum colour strength with darker shades.…”

Decolorisation of Remazol vinyl sulphone reactive dyes by potassium permanganate

“…A TOC analyser (model TOC 5000A; Shimadzu, Japan) was used to measure the concentration of organic carbon in dye solutions. The COD concentration of the dye solution and the decolorised solutions were measured using the Dichromate titrimetric method as described in standard methods [32,33]. The pH value was measured using a Digital pH‐meter (Model pH S‐3B; Leichi, China).…”