Pre-cationization of cotton fabrics: An effective alternative tool for activation of hydrogen peroxide bleaching process

The bleaching process is one of the steps of cotton fabric manufacture. Traditionally, the most common bleaching procedure is based on the use of a hydrogen peroxide (H 2 O 2 ) solution in alkali pH associated with high temperature. In this study, we investigated the possibility of applying a photolysis technique, combining ultraviolet (UV) light and H 2 O 2 in acidic pH to promote raw cotton fabric bleaching, without adding heat and stabilizers to the process. A colorimetric analysis was performed to assess the bleaching procedure in the samples. The experiment consisted in moistening cotton fabric samples with H 2 O 2 and then illuminating them with UV light with different doses, ranging from 0.6 to 36 J cm -2. Our findings have shown that it is important to balance the hydrogen peroxide and the amount of delivered UV light to the cotton fabric in order to achieve a satisfactory whiteness without compromising the fabric mechanical properties.

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“…4,27 This is a preliminary result of the use of acidic hydrogen peroxide combined with UV light around 254 nm.…”

Section: Discussionmentioning

confidence: 99%

Colorimetric Analysis of Cotton Textile Bleaching through H2O2 Activated by UV Light

Oliveira¹,

Moriyama²,

Bagnato³

2017

J. Braz. Chem. Soc.

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“…fats, waxes, nitrogenous compounds, pectin, etc., as well as generation of hydrophilic groups, i.e. -COOH groups, due to oxidative treatment of jute along with removal and/or destruction of natural coloring matters according to the following equations (Hashem, El-Bisi, Sharaf, & Refai, 2010;Ibrahim et al, 2009;Salam, 2006;Shukla & Pai, 2005;Steinmiller & Cates, 1976):…”

Section: Crosslinking Agent Concentrationmentioning

confidence: 99%

Innovative multi-functional treatments of ligno-cellulosic jute fabric

Ibrahim¹,

Amr²,

Eid³

et al. 2010

Carbohydrate Polymers

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“…Normally, pH value is adjusted by the incorporation of an appropriate amount of NaOH (Hashem et al 2010). Therefore, a suitable ratio of NaOH to H2O2 (mass ratio) should be chosen during the bleaching process.…”

Section: Effect Of Two-step Chemical Treatment On Physical Propertiesmentioning

confidence: 99%

Effects of Supplementary Alkali after Alkaline Peroxide Treatment on the Properties of Bleached Kraft Pine Fluff Pulp

Xu¹,

Wang²,

Qian³

et al. 2015

BioResources

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Effects of dual-treatment on cellulose fiber quality, micro-structure appearance, crystalline structure, hydrogen bonds, and surface elements were analyzed using a fiber quality analyzer (FQA), scanning electron microscope (SEM), wide-angle X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and X-ray photoelectron spectroscopy (XPS), respectively. In comparison to the untreated pulp, the brightness of pulp increased by 51.71%, whereas the apparent density and burst strength index of the pulpboard decreased by 11.76% and 48.18%, respectively. The absorption time, absorbability, and bulk of the fiber obtained by defibering the pulpboard decreased by 47.40%, 8.33%, and 5.32%, respectively, when it had been subjected to supplementary alkali. With the analysis of FQA and SEM, fiber swelled and curled, its surface was relatively smooth, and filaments of its partial surface area were exposed as a result of the supplementary alkali. Additionally, XRD analysis, FT-IR analysis, and XPS scanning spectra all showed that the crystallinity degree of fiber decreased by 45.10%, indicating more crystal structures were converted into amorphous structures. The proportion of total intra-molecular hydrogen bond intensity to total hydrogen bonds increased. The -OH content on fiber surface only decreased by 4.15%, compared with those of the untreated pulp, when the fiber was subjected to the two-step chemical treatment.

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Pre-cationization of cotton fabrics: An effective alternative tool for activation of hydrogen peroxide bleaching process

Cited by 77 publications

References 10 publications

Colorimetric Analysis of Cotton Textile Bleaching through H2O2 Activated by UV Light

Colorimetric Analysis of Cotton Textile Bleaching through H2O2 Activated by UV Light

Innovative multi-functional treatments of ligno-cellulosic jute fabric

Effects of Supplementary Alkali after Alkaline Peroxide Treatment on the Properties of Bleached Kraft Pine Fluff Pulp

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