Pore Structure and Dyeability of Cotton Crosslinked with DMDHEU and with DHDMI

Bertoniere, Noelie R.; King, Walter D.

doi:10.1177/004051758905901009

Cited by 24 publications

(11 citation statements)

References 7 publications

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“…Whereas untreated cotton is readily dyeable with anionic dyes, in the presence of salt, dyeing crosslinked cotton to a comparable deep shade is not possible unless the cellulose structure has been correctly modified. The crosslinked fibre is restricted from swelling under aqueous conditions, thereby preventing diffusion of relatively large dye molecules into the crosslinked substrate [16]. Several studies have examined possible improvements to the dyeability of crosslinked cotton using cationic additives and/or crosslinkers [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the improved dyeability of cationised cotton via photografting with UV active cationic monomers

Jang

Carr³

2001

Coloration Technology

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In this study cotton fabric was photografted with cationic monomers using UV radiation. The dyeability of cationised cotton, in the absence of salt, with three classes of dye (direct, reactive and sulphur dyes) was significantly improved due to the increased ionic attraction between the dyes and the cationic cotton. The colour fastness of the cationised fabric was similar or better than that of the untreated fabric. In addition, when cationised, crosslinked crease‐resist cotton also showed improved dyeability, in the absence of salt, to direct dyes.

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Section: Introductionmentioning

confidence: 99%

Investigation of the improved dyeability of cationised cotton via photografting with UV active cationic monomers

Jang

Carr³

2001

Coloration Technology

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“…The results were interpreted in relation to the receptivity of these fabrics towards CI Direct Red 81. Although cross-linking reduced the accessible internal volume, samples reacted with DHDMI retained substantially more accessible internal volume across the entire range of pore sizes [218].…”

Section: Subsequent Dyeing Of Cross-linked Cottonmentioning

confidence: 94%

“…Factors influencing the dyeability of cross-linked cotton with direct dyes have been studied in more detail [217,218]. Cotton fabrics cross-linked with formaldehyde, dimethylolethyleneurea (DMEU) (42) and DMDHEU (43) were dyed with CI Direct Red 81 (12) and Blue 78 (21).…”

Section: Subsequent Dyeing Of Cross-linked Cottonmentioning

confidence: 99%

Developments in direct dyes for cellulosic materials

Shore

1991

Review of Progress in Coloration and Related Topics

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“…Those results strongly support the possibility that the crosslinking state and pore structure for DMDHEUaspartic acid might be different from that for DMDHEU. Many authors [4][5][6][7] have reported that the pore structures of the treated fabrics can be affected by varying the functional groups of crosslinking agents. However, detailed information about the pore structure for fabrics treated with DMDHEU-alpha-amino acids is lacking.…”

mentioning

confidence: 99%

Crosslinking of Cotton Cellulose in the Presence of Alpha-aminoacids Part III: Pore Structures

Wang

Chen

Yao

et al. 2006

Textile Research Journal

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The changes of the absorption bands of the infrared spectra for the cured dimethyloldihydroxyethyleneurea(DMDHEU)-aspartic acid in our previous study [1] revealed that the -OH group of DMDHEU could react with the amino and carboxylic acid groups of aspartic acid. In that study, we also found that the values of wet crease recovery angle (WCRA) and tensile strength retention (TSR) of the fabrics treated with DMDHEU-alpha-amino acids were higher, and dry recovery angles were lower than those expected from DMDHEU alone. The surface distribution of crosslinking agent on the fabrics treated with DMDHEU was similar to that with DMDHEU-alpha-amino acids. On the other hand, the rate constants for DMDHEU-alpha-amino acids were lower than those for DMDHEU alone, which was due to the significantly lower crosslinking reaction between alphaamino acids and cellulose than between DMDHEU and cellulose [2,3]. Those results strongly support the possibility that the crosslinking state and pore structure for DMDHEUaspartic acid might be different from that for DMDHEU. Many authors [4][5][6][7] have reported that the pore structures of the treated fabrics can be affected by varying the functional groups of crosslinking agents. However, detailed information about the pore structure for fabrics treated with DMDHEU-alpha-amino acids is lacking. 1 In the present study two direct dyes having molecular weight of 1356 and 767 g/mole, respectively, were used to study the pore structure of fabrics treated with DMDHEUAbstract Two kinds of alpha-amino acids were used to combine with dimethylol-dihydroxyethyleneurea (DMDHEU) as crosslinking agents. It was found that the values of equilibrium dye absorption, dyeing rate constant and the structural diffusion resistance constant for various combinations of crosslinking agents were in the rank of DMDHEU-glutamic acid > DMDHEU-aspartic acid > DMDHEU alone at the same dyeing temperature. The activation energies of dyeing for the three crosslinked fabrics were ranked as follows: DMDHEU > DMDHEU-aspartic acid > DMDHEU-glutamic acid. The patterns of fiber cross-section obtained by scanning electron microscopy showed that the degree of the swelling of the DMDHEU crosslinked fiber was somewhat lower than that of DMDHEU-alpha-amino acid crosslinked fibers. From this it was concluded that the fabrics crosslinked with the DMDHEUalpha-amino acid combinations had a larger pore structure.

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Pore Structure and Dyeability of Cotton Crosslinked with DMDHEU and with DHDMI

Cited by 24 publications

References 7 publications

Investigation of the improved dyeability of cationised cotton via photografting with UV active cationic monomers

Investigation of the improved dyeability of cationised cotton via photografting with UV active cationic monomers

Developments in direct dyes for cellulosic materials

Crosslinking of Cotton Cellulose in the Presence of Alpha-aminoacids Part III: Pore Structures

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