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

Toshikj, Emilija; Jordanov, Igor; Dimova, Vesna; Mangovska, Biljana

doi:10.5755/j01.ms.22.3.12110

Cited by 6 publications

(4 citation statements)

References 10 publications

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“…The pre-treatment process removed non-cellulose components from cotton yarns and influenced their surface functional group; therefore, it was proven that alkaline-scoured cotton yarns possess lower carboxyl and aldehyde group amounts than enzymatic-scoured cotton yarns [21,22]. Thus, to remove all non-cellulosic components from cotton yarns, rigorous alkaline scouring and bleaching processes were conducted, and the amount of carboxyl and aldehyde groups of these yarns determined with the calcium acetate method was 60 and 10 mmol/kg, respectively [19,20].…”

Section: Resultsmentioning

confidence: 99%

Antimicrobial Active Chitosan-Based Cotton Yarns: Effect of Chitosan Solution Concentration

Toshikj

Petrovski

Petrovska

et al. 2023

TEKS

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Using the exhaustion-pad-dry-rinse method, chitosan was applied to alkaline-scoured and bleached cotton yarns in a solution with concentrations ranging from 0.2–1% to achieve good antimicrobial activity against the bacteria Escherichia coli (Gram-negative) and Staphylococcus aureus (Gram-positive). Studied samples were also assessed by measuring the amount of introduced chitosan, amount of accessible amino groups, mechanical properties, whiteness index and the b* colour coordinate. Alkaline-scoured and bleached cotton yarns treated with all concentrations of the chitosan solution showed good antimicrobial activity against Escherichia coli and Staphylococcus aureus. Better antimicrobial activity was achieved against Escherichia coli. Increasing the concentration of chitosan solution deteriorated the mechanical properties of chitosan-treated cotton yarns. The optimal concentration of chitosan solution incorporated in the exhaustion phase to obtain chitosan-treated yarns with good antimicrobial activity and mechanical properties was 0.6%. The best antimicrobial treatment should minimise potential economic costs while providing functionality.

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Section: Resultsmentioning

confidence: 99%

Antimicrobial Active Chitosan-Based Cotton Yarns: Effect of Chitosan Solution Concentration

Toshikj

Petrovski

Petrovska

et al. 2023

TEKS

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“…The similar composition of the rice husk with natural cellulose fibers like cotton, linen, or flax fibers, suggests that alkaline scouring has a high chance of successful lignin removal (Ivanovska et al 2020;Lazic et al 2018;Tarbuk et al 2020;Toshikj et al 2016Toshikj et al , 2017. As mentioned before, the low cost of the adsorption and modification process is detrimental.…”

Section: Introductionmentioning

confidence: 89%

Adsorption of BEZAKTIV BLAU V3-R and BEZAKTIV BLAU S-2R reactive dyes onto rice husk modified by the circular economy concept

Mladenovic

Petkovska

Dimova

et al. 2022

Preprint

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Rice husk, modified with effluent from the alkaline scouring of cotton, employing an inexpensive treatment based on the circular economy concept, is used as a bio-sorbent to study the equilibrium and kinetic on cold brand BEZAKTIV BLAU V3-R (BBV3-R) and medium brand BEZAKTIV BLAU S-2R (BBS2-R) reactive dyes. 10, 20, and 40 g L-1 rice husk is used to follow adsorption of 0.1, 0.2, 0.3, 0.4, and 0.5 g L-1 BBV3-R and BBS2-R in a presence of 60 g L-1 NaCl at pH 10, at the temperature of 25oC and 40oC, respectively. Langmuir, Freundlich, and Dubinin-Radushkevic's adsorption models were employed, with the Freundlich model proving the best fit for our data. Activation energy calculated with the Dubinin-Radushkevic model (lower than 8 KJ mol-1) confirms the physical sorption of these reactive dyes onto the husk. The obtained maximum experimental absorption capacities of 122.2 mg g-1 for BBV3-R and 171.7 mg g-1 for BBS2-R using 10 g L-1 ERH are the best found in the literature. Pseudo-second-order model determines the adsorption kinetics, while the liquid film diffusion model is rate-determining. This paper demonstrates the applicability of the circular economy concept to obtain an efficient adsorbent for purifying colored effluent enriched with reactive dyes, which are one of the most challenging dyes in the textile industry from the aspect of their effluent purifying.

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“…Alkaline and acid pectinases were used for enzymatic scouring of raw cotton, alone, 6,[14][15][16] or in combination with selective 17 and non-selective oxidants. 18 Pectinases improved the hydrophilicity of cotton, while oxidation of enzymatically scoured cotton imparted aldehyde and carboxyl groups to the cotton without substantial degradation of cotton yarns, confirmed by only a 15% decrease in tensile strength and an 8% decrease in the degree of polymerization.…”

Section: Introductionmentioning

confidence: 95%

Influence of Pectinase Adsorption on Scouring Efficiency of Mercerized Cotton Yarns

Gorgieva,

Mladenovic,

Petkovska

et al. 2023

AATCC Journal of Research

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The low scouring efficiency of mercerized cotton yarns scoured with alkaline and acid pectinases, reported in previously published articles, raised the hypothesis of the lack of pectinase adsorption onto mercerized cotton. In an attempt to identify whether low pectinase adsorption occurs, the adsorption of alkaline and acid pectinases on raw and mercerized cotton yarns is measured using the Lowry protein assay, while laser-scanning confocal fluorescence microscopy is used to visually show the presence/absence of the enzymes on the surface of the cotton yarns. In addition, the surface zeta potential of the raw and mercerized cotton yarns is measured to identify the influence of the surface charge on the adsorption ability of the used enzymes. Data suggest that although used substrates have adsorbed more alkaline than acid pectinase, the adsorption of both enzymes is more intensive onto the mercerized cotton relative to raw cotton. The similar surface zeta potential of the raw and mercerized yarns indicates that higher enzyme adsorption on mercerized cotton is not influenced by the surface charge. Laser-scanning confocal fluorescence microscopy micrographs depict an evident increase of fluorescing signal with scouring time to raw and mercerized cotton yarn. The more intensive signals after 60 min of enzymatic scouring with both enzymes suggest enzyme presence on the yarn surface after a long treatment time. The obtained results confirm the enzyme retention on the yarn surface, thus excluding the hypothesis that the absence of enzyme adsorption is a factor for the low scouring efficiency of mercerized cotton yarns.

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

Cited by 6 publications

References 10 publications

Antimicrobial Active Chitosan-Based Cotton Yarns: Effect of Chitosan Solution Concentration

Antimicrobial Active Chitosan-Based Cotton Yarns: Effect of Chitosan Solution Concentration

Adsorption of BEZAKTIV BLAU V3-R and BEZAKTIV BLAU S-2R reactive dyes onto rice husk modified by the circular economy concept

Influence of Pectinase Adsorption on Scouring Efficiency of Mercerized Cotton Yarns

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