Bleaching of Knitted Cotton Fabric Applying Ozone

Piccoli, Heiderose Herpich; Souza, Sabrina da Silva de

doi:10.1080/01919512.2014.939742

Cited by 23 publications

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“…Na literatura foi obtido um resultado de grau de branco médio de 54,88 WI CIE [28], um valor bem próximo aos obtidos neste trabalho, conforme mostra a Tabela 6. Assim conclui-se que os fatores que determinam o grau de branco dos tecidos são o tempo de exposição ao ozônio e a dosagem aplicada.…”

Section: Discussionunclassified

“…Após a aplicação do ozônio, foi necessário um banho de 5 min em 100 ml de água destilada a 60ºC para remover os resíduos de impurezas solúveis que não foram oxidadas. Nestas condições a faixa média do grau de branco obtida foi de 54,88 WI CIE e os desvios padrões foram baixos caracterizando uma boa qualidade de reprodução e homogeneidade de pré-alvejamento nas amostras [28].…”

Section: Introductionunclassified

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Pre-alvejamento de materiais têxteis com ozônio e avaliação de suas propriedades de superfície, físicas e tintoriais

2017

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A inovação dos processos de beneficiamento de materiais têxteis é cada vez mais importante para possibilitar a redução no consumo de água e nos tempos de processo na indústria têxtil. O consumo de fibras têxteis no Brasil em 2014 foi de 13,3 kg por habitante, e para beneficiar estes tecidos são utilizados em média 80 litros de água para cada quilograma de substrato tratado. Este estudo visou aprimorar o processo de pré-alvejamento para tecidos têxteis utilizando o ozônio com o objetivo de reduzir o consumo de água, de aditivos químicos, de tempo e bem como de energia. O potencial de redução do ozônio (2,07 V) é maior que o potencial de redução do peróxido de hidrogênio (1,77 V), o que faz com que o ozônio seja um excelente agente oxidante. A avaliação dos resultados de resistência física (estouro e tração), propriedades tintoriais (K/S, FC % e DE) e do grau de branco do tecido, indicam que o processo de pré-alvejamento com ozônio a frio é promissor na indústria têxtil, pois além de eliminar a utilização de peróxido de hidrogênio e hidróxido de sódio, reduz o tempo de processo em 60% e diminui o consumo de água em 50%.Palavras-chave: Materiais têxteis. Algodão. Poliéster. Pré-alvejamento. Ozônio. ABSTRACTThe innovation of the processes of the textile materials is becoming more and more important to reduce the amount of water and the use of machinery time in the textile industry. The consumption of textile fibers in Brazil in 2014 was 13,3 kilograms per capita and to produce these fabrics with 80 liters of water on average are used to each kilo of treated substract. This study aims to improve the pre-bleaching process for textile fabrics using the ozone with the objective to reduce the consumption of water, chemical products, time as well as energy. The potential for reducing ozone (2.07 V) is greater than the reduction potential of hydrogen peroxide (1.77 V), which makes the ozone is an excellent oxidising agent. The evaluation of results in resistance (strength and traction), dyeing properties (K/S, FC % and DE) and the whiteness degree of prebleached fabrics using cold ozone indicates that this is a promising process for the textile industry, since it not only eliminates the use of hydrogen peroxide and sodium hydroxide but also allows eliminating the process in at least 60% also reducing water consumption in 50%.

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Section: Discussionunclassified

Section: Introductionunclassified

Pre-alvejamento de materiais têxteis com ozônio e avaliação de suas propriedades de superfície, físicas e tintoriais

2017

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“…The ozone bleaching of cotton fabrics has been studied before, for example, Prabaharan and Rao (2001), Perincek et al (2007) and Piccoli et al (2015) reported the usability of ozone in the bleaching of cotton fabric. In our previous study, starch sized cotton fabric was firstly bleached with ozone gas and then washed via ultrasound and this application was repeated to obtain higher whiteness degrees (Benli and Bahtiyari 2015).…”

Section: Introductionmentioning

confidence: 99%

Ozone bleaching of cotton fabrics with the aid of ultrasonic humidifier

Bahtiyari

Benli

2016

Cellulose

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Cotton is an important industrial commodity for textile production. Its finishing is complicated and requires energy, chemicals and water. In this respect, for its sustainable production, some precautions should be taken. Today, due to consumer's awareness of environmental issues, studies on ecologic alternative finishing processes have attracted much attention. In this study cotton, which is a natural cellulosic fiber, was bleached via the use of ozone gas and ultrasonic humidifier. Then the coloration of the fabrics was conducted by using green walnut shells (husks). In this way, it was planned to introduce alternative sustainable methods for cotton fabric finishing. It was found that ozone can be used for bleaching of cotton fabrics and even when no mordanting was applied; good colors with sufficient fastnesses were obtained from the cotton fabrics dyed with green walnut shells (husks). Moreover a way to utilize green walnut shells (husks), which are in fact cellulosic waste, was also introduced.

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“…In addition, UV light is generated as a by-product during plasma treatment with oxygen. The UV light assists in the generation of hydroxyl (•OH) radicals which are responsible for colour fading in dyed fabric [15][16][17][18]. Since the effectiveness of the plasma-induced ozone colour-fading treatment can be controlled by process parameters [6,14], this study is aimed to study the effect of process parameters of plasma-induced ozone colour-fading treatment on the colour properties of a blue sulphur-dyed knitted cotton fabric.…”

Section: Introductionmentioning

confidence: 99%

“…In plasma treatment using oxygen, the oxygen can generate different active plasma species (O 3 and O•) [15,16]. The ozone (O 3 ) generated is a strong oxidising agent [17,18] which is readily dissolved in water to become an effective oxidant (•OH radical) for colour fading [15]. In addition, UV light is generated as a by-product during plasma treatment with oxygen.…”

Section: Introductionmentioning

confidence: 99%

A Parameter Study of the Effect of a Plasma-Induced Ozone Colour-Fading Process on Sulphur-Dyed Cotton Fabric

et al. 2018

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Abstract:A plasma-induced ozone colour-fading treatment was used for treating a blue sulphur-dyed knitted cotton fabric. Since the process parameters of plasma-induced ozone colour-fading treatment are inter-related with one other, the final colour-fading results are affected. An orthogonal array testing strategy (OATS) method was used for determining the optimum conditions of the plasmainduced ozone colour-fading treatment in this study. Three process parameters used in the plasmainduced ozone colour-fading treatment, i.e., oxygen gas concentration (%), water content in fabric (%), and treatment time (minutes), were used in the optimization process. Experimental results reveal the optimum conditions for fading the colour by plasma-induced ozone colour-fading treatment are: (1) oxygen gas concentration = 70%; (2) water content in fabric = 35%; and (3) treatment time = 30 min. The order of importance of these parameters is: oxygen gas concentration > water content in fabric > treatment time. In addition, the plasma-induced ozone colour-fading treatment can effectively remove the colour from the dyed fabric and the colour-fading effect is uniform and even.

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Bleaching of Knitted Cotton Fabric Applying Ozone

Cited by 23 publications

References 14 publications

Pre-alvejamento de materiais têxteis com ozônio e avaliação de suas propriedades de superfície, físicas e tintoriais

Pre-alvejamento de materiais têxteis com ozônio e avaliação de suas propriedades de superfície, físicas e tintoriais

Ozone bleaching of cotton fabrics with the aid of ultrasonic humidifier

A Parameter Study of the Effect of a Plasma-Induced Ozone Colour-Fading Process on Sulphur-Dyed Cotton Fabric

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