Spectrophotometric study of the photo-degradation of disperse dyes on cellulose diacetate and polyamide films

The present study is carried out to optimize the dyeing conditions for silk fabrics using a new natural dye, Vervain barks at different pH values in the absence of mordants. Also, experiments are implemented to investigate the effects of processing conditions on color difference, color scale, color strength and light fastness characteristics. The changes in the morphology of the silk fabric surface after dyeing are studied using a scanning electron microscope. The pH in the acidic range 1-5 is optimum for dyeing, showing very good fastness properties for silk dyed fabrics.

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“…Dyeing of silk fabrics was carried out using a liquor ratio of 1:50 at 80°C for one hour (Tera, Micheal & Hebeish, 1987).…”

Section: Dyeing Methodsmentioning

confidence: 99%

Optimization of Dyeing Performance of an Eco Friendly Natural Dye “Vervain Barks” applied to Silk Fabrics at Different pH Values

Al-Amoudi

Osman

2009

Research Journal of Textile and Apparel

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“…Figure (4) shows the dye-ability expressed as (K/S) values for different treated fabrics dyed with Disperse Blue 73 .It is clear that for blank dyed fabrics, the (K/S) values follow the order: pure polyester > blend cotton /polyester (25/75%) > pure cotton . Blank polyester samples dyed with disperse dye class have the highest dye-ability because it is well known that they have a higher substantivity to disperse dyes owing to their chemical structure which contains a higher number of polar substituents (NH 2 ) amine (Tera et al, 1987). Thus, they have a higher substantivity for pretreated polyester fabrics.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

“…The enormous increase in dye-ability of all fabrics by exposure can be explained from the previously discussed FTIR analysis where the peak intensity values of the different functional groups characterize each of the examined fabrics (Tables 1-3), largely increasing by prolonging exposure. Thus the polarity of these treated fabrics increase to some extent which increases their availability for linkage with reactive species of disperse dye, and hence increasing dye up-take (Tera et al, 1987).…”

Section: Mechanical Propertiesmentioning

confidence: 99%

“…Blank polyester samples dyed with disperse dye class have the highest dye-ability because it is well known that they have a higher substantivity to disperse dyes owing to their chemical structure which contains a higher number of polar substituents (NH 2 ) amine(Tera et al, 1987). Thus, they have a higher substantivity for pretreated polyester fabrics.Foron Blue S-BGL,C.I.…”

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confidence: 99%

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Characterization and Evaluation of Physico-Chemical Properties of Polymeric Fabrics Treated with UV/Ozone

Ibrahim

El-Zaher

Micheal

2010

Research Journal of Textile and Apparel

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Recently, much attention has been focused on using physical treatments for improving functional properties of polymeric fabrics since they have several useful advantages, such as non toxicity, soil release, improving physical properties and chemical reactivity of fabrics, avoiding environmental pollution resulting from chemical modification, etc. Hence, this article discusses the feasiblity and characterization of using UV/ozone treatments as a source of surface modification on the surface and bulk characteristics of various polymeric fabrics. Thus, pure cotton, pure polyester, and blend (cotton/polyester) fabrics are treated with UV/ozone for different periods of time (1,3,5,10,15, 20 and 60 minutes). The treated samples are examined and evaluated through various measurements involving the Fourier transform infrared spectra (FTIR) that provides evidence for the changes in the peak intensity values of different functional groups characterizing each fabric ,whiteness and yellowness indices, tensile strength, percentage elongation, and Young's modulus values, which are inversely related to the elacticity of the fabric. Moreover, the efficiency of this treatment process is tested by evaluating the dyeing characteristics by using two different dye classes which involve measuring dye up-take (K/S) values and light fastness assessments.

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The Effect of a Hydrophobic Coating on the Photodegradation of Dyed Nylon 6 Yarns

Sedláček,

Roso,

Manian

2023

Fibers Polym

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Nylon 6 is one of the most widely used polymers in the world. For some nylon products, hydrophobic coatings are used for impregnation. However, it has been suggested in the literature that coating could accelerate aging. Therefore, in this paper, we focused on the degradation process of dyed nylon yarns with and without perfluorinated coating under accelerated weathering conditions. To monitor the degradation process, we used methods such as tensile test, molecular weight analysis, ultraviolet–visible spectroscopy, Fourier-transform infrared spectroscopy, differential scanning calorimetry, energy dispersive X-ray analysis, and scanning electron microscopy. We found that the hydrophobic coating is unlikely to have a negative effect on the degradation process. However, the coating decomposes during weathering, and its concentration on the fiber's surface decreases. The type of dye used was identified as the most significant factor influencing the degradation rate. This was explained by the screening effect of dyes in the UVA region of the light spectrum. Manufacturers of nylon products, which require a pleasant appearance and safety, should, therefore, consider a careful selection of dyes.

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Spectrophotometric study of the photo-degradation of disperse dyes on cellulose diacetate and polyamide films

Cited by 7 publications

References 10 publications

Optimization of Dyeing Performance of an Eco Friendly Natural Dye “Vervain Barks” applied to Silk Fabrics at Different pH Values

Optimization of Dyeing Performance of an Eco Friendly Natural Dye “Vervain Barks” applied to Silk Fabrics at Different pH Values

Characterization and Evaluation of Physico-Chemical Properties of Polymeric Fabrics Treated with UV/Ozone

The Effect of a Hydrophobic Coating on the Photodegradation of Dyed Nylon 6 Yarns

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