Stability of DMDHEU and Alkylated Crosslinking Finishes Towards Acidic and Alkaline Hydrolysis

Abhyankar, Prashant N.; Beck, Keith R.; Ladisch, Christine M.; Bertoniere, Noelie R.

doi:10.1177/004051758705700704

Cited by 10 publications

(12 citation statements)

References 18 publications

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“…Indeed, the inability of the NaOH solutions to remove all the bound nitrogen and hence produce incomplete dissolution of the alkali-treated fabrics in CED solution has been previously reported (Abhyankar et al 1985(Abhyankar et al , 1986a(Abhyankar et al , 1987. The inability to remove all of the nitrogen assigned to DMDHEU is due to the nature of the interaction between the easy-care finish and the cotton cellulose.…”

Section: Resultsmentioning

confidence: 98%

“…Both control and easy-care finished cottons were stripped in sodium hydroxide solution following the methods described in the literature (Abhyankar et al 1985(Abhyankar et al , 1986a(Abhyankar et al , 1987 with minor modifications. A solution of 23 % w/w sodium hydroxide was cooled to 23 ºC and then divided into two portions each in a 250-ml beaker.…”

Section: Alkali and Acid Treatments Of Cotton Fabricsmentioning

confidence: 99%

“…Several investigations have previously been undertaken to determine the stability of the easy-care finishes and identify methods of removal from the fabrics (Abhyankar et al 1985(Abhyankar et al , 1986a(Abhyankar et al , 1987. Abhyankar et al (1985) reported the immersion of DMDHEU-treated cotton fabric in a solution of 23 % NaOH at the boil for 10 min and found that although the crease recovery angle (CRA) performance of the stripped fabric was reduced to that of the untreated fabric, there were still some traces of nitrogen assigned to DMDHEU remaining in the fabric.…”

Section: Introductionmentioning

confidence: 99%

“…The advantage of urea phosphoric acid hydrolysis is that it is applied at relatively lower temperatures than alkaline hydrolysis. However, the stripping of easy-care finishes using urea phosphoric acid followed by alkali treatment left residual nitrogen in the cotton and an associated insolubility of the ethyl acetate solution even though the CRA performance of the cotton substrate was reduced to that of the untreated fabric (Abhyankar et al 1987).…”

Section: Introductionmentioning

confidence: 99%

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Investigation into the removal of an easy-care crosslinking agent from cotton and the subsequent regeneration of lyocell-type fibres

2014

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Dimethylol dihydroxyethylene urea (DMDHEU)-treated cotton fabrics were treated with alkali or alternatively acid followed by alkali for increasing time periods, and their effectiveness in removing the crosslinking agent was investigated by surface (X-ray photoelectron spectroscopy) analysis, bulk analysis, crease recovery angle performance and solubility in specific solvents. The cellulose yield after the chemical stripping processes was established and the effect of the acid and alkali treatments on the degree of polymerisation of the resultant cellulose determined. Surface and bulk analyses and solubility tests suggested that alkali alone could not remove the DMDHEU from the crease-resist-treated cotton fabric. However, a sequential acid/alkali treatment effectively removed the easy-care finish from the cotton fabric and produced a commercially viable yield of cellulose.

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Section: Resultsmentioning

confidence: 98%

Section: Alkali and Acid Treatments Of Cotton Fabricsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Investigation into the removal of an easy-care crosslinking agent from cotton and the subsequent regeneration of lyocell-type fibres

2014

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“…Both control and easy care finished cotton were 'stripped' in sodium hydroxide solution based on the following methods described in the literature (Abhyankar, Beck, Ladisch, & Bertoniere, 1987;Abhyankar, Beck, Ladisch, & Frick, 1986;Abhyankar, Beck, Ladisch, & Rowland, 1985) with some minor modifications (Haule et al, 2014). A solution of 23% w/w sodium hydroxide was prepared, cooled to 23 °C modifications (Haule et al, 2014).…”

Section: Alkali Treatment Of Cross-linked Fabricsmentioning

confidence: 99%

Investigation into the removal of a formaldehyde-free easy care cross-linking agent from cotton and the potential for subsequent regeneration of lyocell-type fibres

Haule

Carr

Rigout

2015

The Journal of The Textile Institute

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1,2,3,4-Butane tetracarboxylic acid (BTCA)-treated cotton fabrics were immersed in alkali for increasing time periods and the effectiveness of alkali in removing the cross-linking agent was investigated by surface (X-ray photoelectron spectroscopy, XPS) analysis, attenuated total reflectance Fourier transform infrared spectroscopy and solubility in specific solvents. The cellulose yield after the chemical 'stripping' processes was established and the effect of the alkali treatments on the degree of polymerization of the resultant cellulose determined. Surface analyses and solubility tests suggested that the alkali alone could successfully remove the BTCA from the crease resist-treated cotton fabric and produced a commercially viable yield of cellulose.

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Textiles, Finishing

Calamari

Harper

2000

Kirk-Othmer Encyclopedia of Chemical Technology

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Textile finishing includes various efforts to improve the properties of textile fabrics, whether for apparel, home, or other end uses. In particular, these processes are directed toward modifying either the fiber characteristics themselves or the gross textile end properties. Such modifications may be chemical or mechanical in nature. One modification that is not covered in this article relates to the dyeing of textiles and the dyestuffs employed for fibers; however, areas that involve chemical finishing designed to modify the normal dye receptivity and the growing use of enzyme treatments are included.Fibers have been used by humans for thousands of years, but only in the twentieth century has there been such an explosion in fiber types available to the textile manufacturer. The advent of synthetic fibers possessing improved resiliency and dimensional stability has placed natural fibers, particularly cotton (qv), at an ostensible disadvantage. Before synthetics, various means to control the shrinkage, dimensional stability, and smooth-dry performance of cotton had been investigated, but the appearance of synthetics such as polyester has placed a greater sense of urgency on cotton interests to focus on the perceived deficiencies of natural fibers.Textile finishing encompasses a broad range of approaches and may be directed toward needed properties such as shrinkage control or smooth-dry performance or toward developing properties for specific end uses such as flame retardance, soil release, smolder resistance, weather resistance, or control of static charges.From a historical point of view, mechanical finishing processes have been directed toward improving shrink resistance via compressive shrinkage (Sanforized process) or calender finishing to give surface effects, which include shreinering, chintz finishing, and embossing. These latter effects are semidurable, and can be made more permanent by cross-linking with resins. However, such cross-linked fabrics seem to suffer greater loss in tearing strength when cross-linked in the calendered state. The need for calendered fabrics has decreased with the advent of cross-linked cotton, but compressive shrinkage to control garment shrinkage remains a significant component in textile mill practice, particularly for products that receive little or no resin treatments.For fabrics of thermoplastic fibers, permanent effects are obtainable if heat and pressure are applied to soften the material. Processes dealing with carpets, nonwovens, and chemical modifications or additions that occur before the fiber is formed are not discussed herein (see Nonwoven fabrics).

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Stability of DMDHEU and Alkylated Crosslinking Finishes Towards Acidic and Alkaline Hydrolysis

Cited by 10 publications

References 18 publications

Investigation into the removal of an easy-care crosslinking agent from cotton and the subsequent regeneration of lyocell-type fibres

Investigation into the removal of an easy-care crosslinking agent from cotton and the subsequent regeneration of lyocell-type fibres

Investigation into the removal of a formaldehyde-free easy care cross-linking agent from cotton and the potential for subsequent regeneration of lyocell-type fibres

Textiles, Finishing

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