Resin-assisted Fixation of a Reactive Dye onto Cotton Fabric and its Effect on Fabric Properties

Nkeonye, P. O.; Ogbose, Louis

doi:10.1080/00405009108659214

Cited by 3 publications

(1 citation statement)

References 5 publications

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“…However, confusion still remains as to its reactivity, and the mechanism of its dehydrating effect with carboxylic acid to form anhydrides has not been fully established. 34 Cyanamide is known to exist, as illustrated in Fig. 6, in equilibrium with its carbodiimide tautomer.…”

Section: Resultsmentioning

confidence: 99%

Use of Fourier Transform Infrared Spectroscopy to Follow the Heterocumulene Aided Thermal Dehydration of Phthalic and Naphthalic Acids

Rigout

Lewis

2006

Appl Spectrosc

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Fourier transform infrared (FT-IR) spectroscopy has been successfully employed to follow the formation of phthalic anhydride and 1,8-naphthalic anhydride on heating their corresponding acids. The effects of three heterocumulenes, cyanamide, dicyandiamide, and sodium cyanate, on the temperature of formation of the anhydrides were also investigated using this method. It was found that the carbodiimides cyanamide and dicyandiamide dramatically lowered the temperature at which thermal dehydration of the acid led to anhydride formation. It was noted that cyanamide had a stronger catalytic effect than dicyandiamide, presumably due to the electron-withdrawing effect of the amidine group. Sodium cyanate was also found to promote the thermal dehydration of the acids to form the corresponding anhydrides. Under more severe conditions, phthalic acid anhydride formed is seen to react further, leading to the formation of phthalimide. The discrepancy between the products obtained with cyanamide and sodium cyanate leads to the conclusion that, unlike earlier claims, imide formation is not due to the reaction of the anhydride with the urea formed but with sodium cyanate itself. However, only the phthalic anhydride five-membered ring system is sufficiently reactive towards the CNO- nucleophile to form the imide; the six-membered 1,8-naphthalic anhydride system does not react in this way.

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Section: Resultsmentioning

confidence: 99%

Use of Fourier Transform Infrared Spectroscopy to Follow the Heterocumulene Aided Thermal Dehydration of Phthalic and Naphthalic Acids

Rigout

Lewis

2006

Appl Spectrosc

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Single‐step dyeing and finishing treatment of cotton with 1,2,3,4‐butanetetracarboxylic acid

Choi

Srinivasan

Morris

1994

J of Applied Polymer Sci

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SYNOPSISA single-step dyeing and finishing (SDF) process was developed to eliminate dyeing problems associated with cotton crosslinked by polycarboxylic acid such as 1,2,3,4-butanetetracarboxylic acid (BTCA). This process consisted of several steps: (a) impregnation of the fabric by the bath containing BTCA, dye, and catalyst; (b) drying; and (c) curing at high temperature. Color strength (K/S) and dye fixation of cotton treated by the SDF process were excellent, especially with reactive dyes containing mono-or dichlorotriazinyl compounds and, in some cases, were higher than those of the sample dyed by a conventional batch process without finishing treatment. The presence of dye in the SDF process did not interfere with crosslinking of cotton. We believed that the reaction occurred between carboxyl groups of BTCA and s-triazinyl groups in reactive dyes in the presence of imidazole and other catalyst. FTIR, Raman, and X-ray fluorescence spectroscopies were used to confirm the mechanism of dye fixation. Elemental analysis also supported this mechanism. The SDF process can be an excellent way to dye fabric that also requires crosslinking treatment for smooth drying appearance.

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Optimization of the pre-application process of a reactive resin before direct dyeing for imparting reserve effects on Elastane/cotton pant garments

Cheriaa¹,

Jaouachi²,

Imed³

2022

Alexandria Engineering Journal

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Resin-assisted Fixation of a Reactive Dye onto Cotton Fabric and its Effect on Fabric Properties

Cited by 3 publications

References 5 publications

Use of Fourier Transform Infrared Spectroscopy to Follow the Heterocumulene Aided Thermal Dehydration of Phthalic and Naphthalic Acids

Use of Fourier Transform Infrared Spectroscopy to Follow the Heterocumulene Aided Thermal Dehydration of Phthalic and Naphthalic Acids

Single‐step dyeing and finishing treatment of cotton with 1,2,3,4‐butanetetracarboxylic acid

Optimization of the pre-application process of a reactive resin before direct dyeing for imparting reserve effects on Elastane/cotton pant garments

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