Comparison of sodium dithionite and glucose as a reducing agent for natural indigo dyeing on cotton fabrics

Abstract The development of cellulose-based textiles that are functionalised with silver nanoparticles (AgNP), synthesised according to a green approach, and offer protection against ultraviolet (UV) radiation and pathogenic bacteria is very important today. In the present work we demonstrate the environmentally friendly approach to obtain such textile material by AgNP synthesis directly (in-situ) on cotton fabrics, using water extracts of plant food waste (green tea leaves, avocado seed and pomegranate peel) and alien invasive plants (Japanese knotweed rhizome, goldenrod flowers and staghorn sumac fruit) as reducing agents. The extracts were analysed for their total content of phenols and flavonoids and their antioxidant activity. The synthesised AgNP on cotton were round, of different size and amount depending on the reducing agent used. The highest amount of AgNP was found for samples where Japanese knotweed rhizome extract was used as reducing agent and the lowest where extracts of goldenrod flowers and green tea leaves were used. Regardless of the reducing agent used to form AgNP, all cotton samples showed excellent protection against E. coli and S. aureus bacteria and against UV radiation with UV protection factor values above 50. The best results for UV protection even after the twelve repetitive washing cycles were found for the sample functionalized with AgNP synthesised with an extract of the Japanese knotweed rhizome. Due to the presence of AgNP on cotton, the air permeability and thermal conductivity decreased. AgNP had no effect on the change in breaking strength or elongation of fabrics. Graphic abstract

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Antibacterial cotton fabrics with in situ generated silver and copper bimetallic nanoparticles using red sanders powder extract as reducing agent

International Journal of Polymer Analysis and Characterization ◽

10.1080/1023666x.2019.1598631 ◽

2019 ◽

Vol 24 (4) ◽

pp. 346-354 ◽

Cited By ~ 4

Author(s):

Amara Venkateswara Rao ◽

Basa Ashok ◽

Mallavarapu Uma Mahesh ◽

Gopireddy Venkata Subbareddy ◽

Vatti Chandra Sekhar ◽

...

Keyword(s):

Bimetallic Nanoparticles ◽

Cotton Fabrics ◽

Reducing Agent ◽

Red Sanders ◽

Powder Extract

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Dyeing Behavior of Indigo Reduced by Indirect Electrolysis

Textile Research Journal ◽

10.1177/004051759706700902 ◽

1997 ◽

Vol 67 (9) ◽

pp. 635-642 ◽

Cited By ~ 18

Author(s):

T. Bechtold ◽

E. Burtscher ◽

A. Turcanu ◽

O. Bobleter

Keyword(s):

Complex System ◽

Sodium Dithionite ◽

Reducing Agent ◽

Cathodic Reduction ◽

Laboratory Scale ◽

Indirect Electrolysis ◽

Conventional Process ◽

Color Depth

Dispersed indigo dyestuff can be reduced by indirect electrolysis using an iron (II)-triethanolamine complex. The iron (III) form of the complex can be transformed to the iron (II) form by cathodic reduction, thus leading to a regenerable reducing agent. Electrochemically reduced indigo is tested in laboratory scale dyeing experiments, and the results of different reduction conditions in the dyebath are discussed. The influence of the concentration of the complex-system on the build-up of color depth and shade with increasing number of dips is discussed and compared with samples of the standard dyeing procedure using sodium dithionite as reducing agent. The results of the latter conventional process show that the dyestuff in the dyebath behaves in a manner similar to that when a regenerable Fe(II)-complex is used as the reducing agent.

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INVESTIGATION OF INDIGO DYEING USING SODIUM BOROHYDRIDE AS REDUCING AGENT

CBU International Conference Proceedings ◽

10.12955/cbup.v5.1071 ◽

2017 ◽

Vol 5 ◽

pp. 1061-1063

Author(s):

Banu YeĹźim Buyukakinci ◽

Nihal Sokmen

Keyword(s):

Cotton Fabric ◽

Sodium Borohydride ◽

Reducing Agent ◽

Fastness Properties ◽

Sodium Hydrosulfite ◽

Color Yield ◽

The World ◽

Indigo Dyeing ◽

Blue Jeans ◽

Textile Sector

Indigo, one of the oldest dyes, has a very important role for the textile sector. It is primarily used to dye cotton clothes, and blue jeans and over one billion pairs of jeans around the world are dyed blue with indigo. Although Sodium Hydrosulfite (Na2S2O4) is used as a reducing agent in most indigo dyeing processes, it is environmentally unfavorable because of the resultant contaminated toxic wastewater. In addition, the color fastnesses of dyed samples using Na2S2O4 as reducing agent are not good enough.In the present paper sodium borohydride (NaBH4) were used as ecologically safe reduction systems for the indigo dyeing of cotton fabric. After dyeing processes, the color yield and fastnesses according to washing and rubbing were measured, and results were compared.It was found when NaBH4 was used as reducing agent instead of Na2S2O4, the color yield and the fastness properties of the dyed samples improved.

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Light fading, rub and wash fastness of sulphur-dyed cotton fabrics aftertreated with cation–tannin protective system

Pigment & Resin Technology ◽

10.1108/prt-11-2019-0104 ◽

2020 ◽

Vol 49 (6) ◽

pp. 431-439

Author(s):

Quratulain Mohtashim ◽

Muriel Rigout ◽

Sheraz Hussain Siddique

Keyword(s):

Public Awareness ◽

Cotton Fabrics ◽

Reducing Agent ◽

Fastness Properties ◽

Sodium Sulphide ◽

Content Type ◽

Wash Fastness ◽

Goods And Services ◽

Protective System ◽

The Impact

Purpose Sulphur dyes are the most highly consumed colourants for cellulosic substrates owing to their reasonable cost and acceptable fastness. However, the use of noxious conventional reducing agent, sodium sulphide and impaired wash fastness against oxidative bleaching is gradually decreasing the market of these dyes. As the need for “Green” goods and services is raising public awareness, this paper aims to use a glucose-based biodegradable reducing agent in place of sodium sulphide to dye cotton fabrics with a range of commercial sulphur dyes. The study also proposes an aftertreatment method to improve the fastness properties of the dyeing. Design/methodology/approach The paper investigated the impact of a newly developed aftertreatment method on the fastness properties of dyeing. This involved the sequential application of a cationic fixing agent (Tinofix ECO) and tannin (Bayprotect CL) on the coloured fabrics and subsequent evaluation of colour strength, washing, light and rubbing fastness. Findings The effect of aftertreating the dyed cotton was found to significantly improve the light and wet rub fastness. The surface morphology of the dyeing remained unaffected as depicted by the absence of any finish residues. Research limitations/implications The protective effect of the cation–tannin aftertreatments was examined with a view to providing the necessary commercial performance; however, it was established that the dry rub fastness was either reduced or remained unaffected and the wash fastness to International Organization for Standardization 105 C09 was also marginal. Originality/value This finishing technique is novel and can be found useful for manufacturing sulphur-dyed products with the improved light and wet rub fastness.

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The synergetic effect of α-hydroxycarbonyls mixtures used as green reducing agent on the indigo dyeing process

Chemical Industry and Chemical Engineering Quarterly ◽

10.2298/ciceq130507028b ◽

2014 ◽

Vol 20 (4) ◽

pp. 463-470 ◽

Cited By ~ 4

Author(s):

Ticha Ben ◽

Nizar Meksi ◽

Neila Drira ◽

Moez Kechida ◽

Mohammed Mhenni

Keyword(s):

Synergetic Effect ◽

Reduction Process ◽

Sodium Dithionite ◽

Optimum Conditions ◽

Design Expert ◽

Dyeing Process ◽

Contour Plots ◽

Indigo Dyeing ◽

Indigo Reduction ◽

Quadratic Models

Textile Industries use different chemicals in dyeing processes, consuming large quantities of water and producing large volumes of wastewater. For the particular case of indigo dyeing processes, its reduction is performed chemically by the addition of sodium dithionite. However, this is considered environmentally unfavorable because of the resulting contaminated wastewaters. Therefore, it is important to replace sodium dithionite with other alternatives in order to achieve cleaner processes. ?-hydroxycarbonyls have been suggested as possible environmentally friendly alternatives to reduce indigo. However, each one applied alone is enable to attain the dyeing performances offered by the conventional reductant. Thus , the study of the synergy of some selected ?-hydroxycarbonyls was proposed. In this paper, a mixture design of experimental (DOE) methods was used to determine the optimum combination of ?-hydrxycarbonyls to be applied in the indigo reduction process. Based on the design expert software, quadratic models were established as functions of ?-hydroxycarbonyls proportions. The diagnostics of models were investigated by using mixture contour plots. Finally, a model was proposed to predict the optimum conditions leading to dyeing performances exceeding those obtained from the reduction of indigo by the conventional sodium dithionite.

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Synthesis of well-defined functionalized poly(2-(diisopropylamino)ethyl methacrylate) using ATRP with sodium dithionite as a SARA agent

Polymer Chemistry ◽

10.1039/c4py00042k ◽

2014 ◽

Vol 5 (12) ◽

pp. 3919-3928 ◽

Cited By ~ 29

Author(s):

Joana R. Góis ◽

Nuno Rocha ◽

Anatoliy V. Popov ◽

Tamaz Guliashvili ◽

Krzysztof Matyjaszewski ◽

...

Keyword(s):

Atom Transfer Radical Polymerization ◽

Radical Polymerization ◽

Catalytic System ◽

Sodium Dithionite ◽

Reducing Agent ◽

Atom Transfer ◽

Ethyl Methacrylate ◽

System P

2-(Diisopropylamino)ethyl methacrylate was polymerized by Atom Transfer Radical Polymerization using sodium dithionite as a reducing agent and supplemental activator with a Cu(ii)Br2/Me6TREN catalytic system.

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The Comparison between a Natural Reducing Agent and Sodium Dithionite in Vat, Indigo and Sulphur Dyeing on Cotton Fabric

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.441.207 ◽

2012 ◽

Vol 441 ◽

pp. 207-211 ◽

Cited By ~ 1

Author(s):

Zahra Motaghi

Keyword(s):

Textile Industry ◽

Waste Water Treatment ◽

Sodium Dithionite ◽

Reducing Agent ◽

Point Of View ◽

Color Strength ◽

Dyeing Process ◽

Pollution Problem ◽

Textile Dyeing ◽

Substance Consumption

In recent years, the use of low-environmental impact biotechnology giving rises to new types of treatment in the textile industry. From the environmental point of view, particularly the textile dyeing process constitutes a major pollution problem due to the variety and complexity of chemicals employed. In most industrial vat and indigo, sulphur dyeing processes, all of them are reduced mainly using sodium dithionite. This process produces large amounts of hazardous by-products which increase the costs for waste water treatment. Hence, many attempts are being made to replace the environmentally unfavorable sodium dithionite by ecologically more attractive alternatives, such as organic reducing agents or catalytic hydrogenation and natural reducing agent. In this paper ,a natural reducing agent is introduced that comes from a plant and have been studied on the substance for comparison it with sodium dithionite on vat, indigo and sulphur dyeing on cotton fabrics. The color strength of the samples was analyzed by Reflective Spectrophotometer and the color fastness of them was investigated. The results show that, the use of natural reducing agent in natural indigo dye and sulphur dye is better and for the rest of them has almost good advantage, but it cannot reduce synthetic indigo as well as sodium dithionite. Therefore, with introducing the substance, consumption of chemicals is minimized and vat, indigo and sulphur dyeing should be environmental.

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Eco-Friendly Vat Dyeing of Cotton Using Alkaline Iron (II) Salt as Reducing Agent

Tekstilec ◽

10.14502/tekstilec2020.64.305-320 ◽

2020 ◽

Vol 63 (4) ◽

pp. 305-320

Author(s):

Omender Kr ◽

◽

J. N. Chakraborty ◽

Keyword(s):

Reduction Potential ◽

Potential Surface ◽

Cotton Fabrics ◽

Sodium Sulphate ◽

Reducing Agent ◽

Vat Dyes ◽

Box Behnken Design ◽

Optimum Parameters ◽

Colour Strength ◽

Sulphate Sulphur

Sodium hydrosulphite is used commercially as the reducing agent for vat dyes in the dyeing of cotton. Large amounts of sodium sulphate, sulphur oxyanion and toxic sulphite are produced during the dyeing due to the dissociation of sodium hydrosulphite leading to severe air and water pollution. This research focuses on the use of alkaline iron (II) salt as the reducing agent for vat dyeing on cotton fabrics through a complete replace¬ment of hydrosulphite. The 34 Box-Behnken design was used to achieve optimum parameters and statistically analyse the performance of the new reducing system. The results showed that the alkaline iron (II) salt system was relatively effective in developing a comparable dyebath reduction potential, surface colour strength of cotton and colourfastness, if compared to the hydrosulphite-based reducing system. The dyebath stability in the presence and absence of the dye also showed superior results compared to that of the hydrosulphite system. Hence, it can be said that a complete substitution of sodium hydrosulphite with alkaline iron (II) salt is possible.

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