Characterization on Surface of Mercerized and Enzymatic Scoured Cotton after Different Temperature of Drying

Abstract

Abstract:The influence of different temperature of drying after mercerizing on enzymatic scouring through changes in the surface properties and scouring efficiency were investigated. Mercerized cotton yarns dried at room temperature (20 o C) and 80 o C were scoured with alkaline and acid pectinases. Alkaline scouring was also done for comparing. Surface properties and scouring efficiency were followed through the CIE whiteness degree, CIELAB coordinates, X-ray photoelectron spectroscopy, staining the non-cellulosic components with appropriate dyes, wettability and surface fee energy. Mercerization changes the cotton surface, and removes part of the cuticle components. Drying at 80 o C melted down the residual waxes covering the surface of the fiber, enhancing the alkaline and alkaline pectinase scouring and enabling acid pectinase scouring. While way of scouring has significant influence on the most measured properties, temperature of drying has significant influence on CIE whiteness, CIELAB coordinates a*, b*, L* BB and on x-ray photoelectron spectroscopy value O/C.

The Influence of Non-selective Oxidation on Differently Pre-treated Cotton Yarns Properties

“…Pre-treatment processes of cotton are very important and may be crucial regarding its further oxidation. The results of analyzed surface residues through dyeing with different dyes published in our previous publications [12,13] are given in Table 2, and the quantity of aldehyde and carboxyl groups before oxidation, obtained by method used in this work, is given in Table 3. Cotton yarns were dyed with direct and reactive dyes for determination of cellulosic purity and oil red, methylene blue (basic dye) and bemacide blue (acid dye) for determination of waxes, pectin and proteins, respectively ( Table 2).…”

“…The altered cuticle allows its different behaviour during scouring resulting in higher quantity of residual carboxyl groups and different behaviour during oxidation. That is why differently scoured-mercerized yarns have lower amount of carboxyl groups than mercerized-differently scoured [12,13]. Carboxyl groups obtained by complexometric titration (EDTA) are increased in all cases after oxidation.…”

“…Our previous research works, were mainly focused on evaluating the changes on cotton surface and non-cellulosic components after different ,,green" pre-treatments [12,13]. Different pre-treatment conditions have strongly influenced the surface charge on cotton fiber, reduced the non-cellulosic components, but they were still detected at the fiber surface [12,13].…”

The Influence of the Wet Processing Stages on Yarn Processability

“…Mercerized yarns were bleached and dyed with reactive dye. Besides, the influence of different temperature of drying after mercerization and enzymatic scouring through changes in the surface properties and scouring efficiency were investigated [6]. The effect of chemical finishing treatments like scouring, bleaching, mercerization and dyeing on the properties of ring spun and compact yarns were investigated by Subramaniam [7].…”

Modification of cellulosic fibers by UV-irradiation. Part II: After treatments effects

“…The process also dissolves hemi-cellulose, solubilize proteins into sodium salts of different amino acids and change pectin into soluble sodium pectate [8]. Scoured cotton has almost completely removed cuticle and non-cellulosic components and enhanced wet-ability [9].…”