Effect of d-isomer concentration on the coloration properties of poly(lactic acid)

Blackburn, Richard S.; Xin, Zhao; Farrington, David; Johnson, Les

doi:10.1016/j.dyepig.2005.05.011

Cited by 30 publications

(21 citation statements)

References 11 publications

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“…PLA filaments with higher melting points have yielded greater dye sorption in the cross section of the filaments than have PLA filaments with lower melting points [8]. PLA fibers containing greater amounts of D-lactide units have shown higher dye sorption than fibers with smaller amounts of D-lactide, but the higher sorption was due to those fibers being more amorphous [9]. High percentage dye sorption is important because it decreases the dye consumption required to obtain a given shade, especially a dark shade, and the lower dye consumption results in less pollution and a lower cost of dyeing.…”

Section: Introductionmentioning

confidence: 96%

“…One major concern with PLA is that only a limited number of disperse dyes have been found to have good sorption on PLA at the appropriate dyeing temperature [1][2][3][4][5][6][7]. PLA filaments with higher melting points have yielded greater dye sorption in the cross section of the filaments than have PLA filaments with lower melting points [8]. PLA fibers containing greater amounts of D-lactide units have shown higher dye sorption than fibers with smaller amounts of D-lactide, but the higher sorption was due to those fibers being more amorphous [9].…”

Section: Introductionmentioning

confidence: 99%

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Effect of disperse dye structure on dye sorption onto PLA fiber

Karst

Nama

Yang

2007

Journal of Colloid and Interface Science

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Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Effect of disperse dye structure on dye sorption onto PLA fiber

Karst

Nama

Yang

2007

Journal of Colloid and Interface Science

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“…Studies on the formation, structure, properties, degradation, and applications of PLA have been reviewed [4]. A few studies on the coloration of the PLA fibers, however, were reported including effect of D-isomer concentration in PLA on disperse dyeing [5], dyeing with vat dyes [6], and clearing of the PLA fibers dyed with disperse dyes using ultrasound [7][8][9].…”

Section: Introductionmentioning

confidence: 98%

Surface modification of poly(lactic acid) by UV/Ozone irradiation

Koo

Jang

2008

Fibers Polym

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Hydrophobic poly(lactic acid), PLA, was modified to give hydrophilicity and dyeability to cationic dyes via UV/ O 3 irradiation. The UV irradiation treatment caused ester linkage of PLA surface to break down resulting in reduced molecular weight and generation of new photooxidized products as indicated in subtracted ATR spectra and ESCA analysis. It was found that water contact angle decreased from 61 o to 39 o and surface energy slightly increased with increasing UV energy, which was attributed to significant contribution of polar component rather than nonpolar component resulting from the surface photooxidation of PLA. Also the surface treatment increased dyeability of PLA to C.I. Basic Blue 41 in terms of both K/ S and %E. The increased dyeability may be due to photochemically introduced anionic and dipolar dyeing sites which electrostatically interact with the cationic dye as ascertained by the decreased zeta potential and its pH dependence of the modified PLA.

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“…A study on the dyeability of PLA fabrics with various proportions of the D-and L-isomers concluded that high D-fibers exhibit greater dye exhaustion and color strength due to more amorphous and less crystalline regions in the polymer. However, in terms of washing fastness, very little difference was found between the low D-fibers and high D-fibers (Blackburn et al, 2006). (Dugan, 2001) …”

Section: Chemical Structure Of Pla Fibersmentioning

confidence: 92%