Journal
DYES AND PIGMENTS
Volume 92, Issue 3, Pages 1025-1030Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2011.06.020
Keywords
Ultrasound; Disperse dyes; Poly(lactic acid); Dyeing; Colour strength; Dye dissagregation
Funding
- National Research Foundation of Korea [NRF-2010-359-D00032]
- Korean Government (Ministry of Education, Science and Technology)
- National Research Foundation of Korea [359-2010-1-D00032] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Six disperse dyes were applied at 0.5%,1% and 2% omf depths of shade to poly(lactic acid) fabric at 30-80 degrees C for 20, 50 and 90 min in both the presence and absence of ultrasound. Whilst ultrasound enhanced the colour strength obtained for three of the six disperse dyes used at temperatures upto 70 degrees C, ultrasound did not always result in enhanced colour strength being achieved in the case of the three other dyes. The observed intensification of colour strength was attributed to dye disaggregation. Dyeing at 80 degrees C in the presence of ultrasound resulted in pale, dull dyeings of reduced colour strength, which was attributed to breakdown of the dye dispersions at this particular temperature. (C) 2011 Elsevier Ltd. All rights reserved.
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