The use of new technologies in coloration of textile fibers

Ahmed, Nahed S E; El‐Shishtawy, Reda M.

doi:10.1007/s10853-009-4111-6

Cited by 125 publications

(65 citation statements)

References 57 publications

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“…From the analysis of results obtained with Table 4 it also can be seen that the wool fabric are subjected to the same conditions of pretreatment and dyeing, except pretreatment medium when using urea as a pretreatment media, the dye uptake is much higher than the corresponding ones with an aqueous pretreatment. Urea has a higher dipole moment than water; the increased concentration of urea in pretreatment caused more absorption of microwave radiation [9]. Thus, there appeared to be a correlation between the concentration of urea and the color depth of dyed wool fabric attained during microwave pretreatment.…”

Section: The Effects Of Microwave Pretreatmentmentioning

confidence: 97%

Untitled

2017

JTEFT

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An investigation was undertaken to study microwave pretreatment and dyeing process of wool fabric. Microwave pretreatment of wool fabric was carried out under variety of conditions in terms of the use of water, 50g/L urea, 100g/L urea in the treatment solution. The area shrinkage, surface morphology, crystallinity and dye ability of the pretreated wool fabric were measured. Effects of microwave fixation time and batching time before microwave fixation on K/S value were analyzed. Fixation, uniformity, color fastness, breaking strength and breaking extension of wool fabric were compared among cold batching fixation, microwave fixation and microwave fixation after pretreatment.

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Section: The Effects Of Microwave Pretreatmentmentioning

confidence: 97%

Untitled

2017

JTEFT

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“…Isso porque, entre outros aspectos, eles acarretam elevada durabilidade no que diz respeito às novas funções aplicadas aos têxteis, na medida em que as funções já existentes costumavam perder o efeito após algumas lavagens ou por causa do uso (AHMED, EL-SHISHTAWY, 2010).…”

Section: A Nanotecnologia Na Indústria Têxtil E De Confecção Do Vestuunclassified

A relação dos consumidores com as inovações têxteis conduzidas pela nanotecnologia

Queiroz¹,

Rocha²

2017

dObra[s]

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A nanotecnologia empregada nos tecidos e no vestuário vem permitindo o desenvolvimento e/ou a melhoria de novas propriedades têxteis, porém, a relação dos consumidores com essas novidades ainda precisa ser estudada. Sabe-se que tais aspectos estão associados à eficácia do produto, a fatores econômicos e a condições culturais, sociais e ambientais. Posto isso, o objetivo deste artigo foi investigar a opinião dos consumidores sobre o conteúdo nanotecnológico de tecidos e roupas com valor de moda. Para tanto, foi realizada uma pesquisa qualitativa que usou a técnica de focus group para coletar os dados. Assim, entre os resultados deste estudo, é possível observar o conceito de nanotecnologia percebido, os benefícios associados a ele e a relação entre riscos e benefícios para os consumidores.

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“…The same conditions of Fenton reaction as for aqueous solution of BDPT (75 mg FeSO 4 /dm 3 and reagent ratio FeSO 4 :H 2 O 2 1:10) have been used for decolorization of BDPT dyestuff solution containing 1, 5, 10, 20, 40 and 80 g NaCl/dm 3 . As it can be seen in Figure 4, only for 1 g NaCl/dm 3 no meaningful decrease of decolorization efficiency appeared compared with the tests without NaCl.…”

Section: Effect Of Nacl On Fenton Processmentioning

confidence: 99%

“…After increasing the FeSO 4 dose up to 200 mg/dm 3 and keeping the ratio FeSO 4 :H 2 O 2 = 1:10, the test has been repeated for samples of BDPT solution containing 0.5, 1.0 and 2.0 g/dm 3 of auxiliary agent -Perigen LDR. In the case of samples containing 0.5 and 1.0 g/dm 3 Perigen LDR the Fenton reaction enabled 99% color reduction, however for the samples containing 2.0 g/dm 3 LDR the degree of color reduction decreased to 75%…”

Section: Effect Of Perigen Ldr Addition On Fenton Processmentioning

confidence: 99%

“…Constapel et al [2] estimated the annual production of these types of dyestuff for over 140,000 Mg, while Ahmed and El-Shishtway [3] announce that 50% of all cellulose fibers is dyed with reactive dyes, and only 17% with vat dyes, 16% with direct dyes, 7% with sulfur dyes, also 7% with indigo dyes and 3% with glacial dyes. Reactive dyes are mostly used to dye cellulose fibers, however there are also groups of reactive dyes dedicated to wool and polyamide.…”

Section: Introductionmentioning

confidence: 99%

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Application of Fenton's Reagent in the Textile Wastewater Treatment Under Industrial Conditions

Ledakowicz¹,

Bilińska²,

Żyłła³

2012

Ecological Chemistry and Engineering S

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Application of reactive dyes is very popular in textile industry as these dyestuffs are characterized by good fastness properties. Constapel et al in 2009 estimated the production of this type of dyes for over 140,000 Mg/year. The reactive dyes are mostly (50%) employed for coloration of cellulosic fibers, however they can also be applied on wool and nylon. Unfortunately, they possess a low degree of fixation (50÷90%), since the functional groups also bond to water, creating hydrolysis and the excess of dyes applied cause a colored pollution of aqueous environment. Moreover, dyeing process requires the use of: electrolytes in the form of aqueous solutions of NaCl or Na2SO4 in the concentration up to 100 g/dm 3 , alkaline environment (pH > 10) and textile auxiliary agents (including detergents). Therefore, the wastewater generated during the reactive dyeing processes is characterized by high salinity, pH value and color, and due to low value of the BOD5/COD ratio are nonbiodegradable. The successful methods of textile wastewater treatment could be Advanced Oxidation Processes (AOPs), amongst which the Fenton reagent seems to be most promising as it is the cheapest and easy in use. Based on the newest literature survey it was found that many successful tests with Fenton reaction were performed mainly in decolorization. However, not enough attention was devoted to decolorization of real industrial wastewater containing dyes, detergents and salts NaCl, or Na2SO4. The experiments carried out in a laboratory scale were focused on the impact of NaCl and textile auxiliary agent (liquid dispersing and sequestering agent) on an inhibition of decolorization process by Fenton's reagent. The objects of the investigation were synthetic mixtures simulating the composition of real textile wastewater as well as the real industrial wastewater generated in the reactive dyeing. The inhibition of the Fenton decolorization in the presence of NaCl and liquid dispersing and sequestering agent was demonstrated. Additional experiments using pulse radiolysis were carried out in order to confirm the inhibition of chloride in the decolorization process.

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The use of new technologies in coloration of textile fibers

Cited by 125 publications

References 57 publications

Untitled

Untitled

A relação dos consumidores com as inovações têxteis conduzidas pela nanotecnologia

Application of Fenton's Reagent in the Textile Wastewater Treatment Under Industrial Conditions

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