The Effects of Hydrogen Peroxide and Sodium Hypochlorite Oxidizing Treatments on the Color Properties of Naturally Colored Green Cotton

Year 2019, Volume: 3 Issue: 2, 1 - 10, 10.10.2019

Ali Serkan Soydan , Arzu Yavaş , Osman Ozan Avinç , Gizem Karakan Günaydın , M. Niyazi Kıvılcım Mehmet Demirtaş Sema Palamutcu

Abstract

Ali Serkan Soydan1, Arzu Yavaş1, Osman Ozan Avinç1, Gizem Karakan Günaydın2, M. Niyazi Kıvılcım3, Mehmet Demirtaş3, Sema Palamutcu*1
1 Pamukkale University, Textiles Engineering Department, Denizli, Turkey
2 Pamukkale University, Buldan Vocational School, Buldan, Denizli, Turkey
3 Cotton Research Institute, Nazilli, Aydın, Turkey
*Corresponding Author email: [e-mail]

The cultivation of naturally
colored cotton has captured the attention lately due to the increasing
environmental concerns and problems. The green color in cotton fibers is owing
to a lipid biopolymer (suberin) sandwiched between the lamellae of cellulose
microfibrils in the secondary wall. Naturally colored green cotton fiber does
not need dyeing or coloration process due to their inherent color characteristics
leading to more ecological and sustainable textile production. Naturally
colored cotton growers and producers have less requirement for the pesticides,
insecticides since these varieties have already insect and disease-resistant
qualities as well as they exhibit property for drought and salt tolerant
leading to more environmental friendly cotton fiber production. The
colorimetric (CIE L*, a*, b*, C*, h^o, K/S etc.) properties of
studied naturally green colored Turkish cotton fiber were explored before and
after scouring (with NaOH), and oxidizing processes with hydrogen peroxide and
sodium hypochlorite (with different sodium hypochlorite concentrations and
different oxidizing treatment periods and at different pH levels, with or
without scouring process as a precursor treatment etc.) in comparison with
their greige (un-treated) counterpart. The application of scouring process with
NaOH to naturally green colored cotton fiber increases the color yield levels
leading to darker appearance. Similarly, hydrogen peroxide and sodium
hypochlorite oxidizing processes resulted in an increase in the color yield
levels of naturally green colored cotton fibers leading to darker appearance.
Even at high sodium hypochlorite concentrations such as 200 ml/l at pH 12 and
room temperature for 48 hours, the naturally green colored cotton fibers
maintain their color.

Keywords

naturally colored cotton, oxidizing, sodium hypochlorite, hydrogen peroxide

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