Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 310, Issue 1, Pages 106-111Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2007.01.037
Keywords
adsorption; disperse dyes; functional groups; intermolecular interactions; molecular modeling; poly(lactic acid); polylactide; PLA
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The effect of the structure of various disperse dyes on their percentage sorption onto polylactide (PLA) is explained using molecular modeling. The interaction energies between the dyes and PLA have been calculated, and a linear equation has been developed to predict the percentage sorption on PLA based on the dye-PLA interaction energy. The predicted percentage sorption for a dye is shown to agree with its experimentally obtained percentage sorption on commercial PLA fabric and on PLA fiber extruded in our laboratory. Within the dyes, the functional groups that form the strongest interactions with PLA are -N(C2H4OCOCH3)(2), -(CO)(2)NC3H6OCH3, -SO2NHC6H5, -NO2, -CN(NH)C6H4, and -CH(CO)(2)C6H4, and the groups that form the weakest interactions with PLA are -Br and -Cl. (c) 2007 Elsevier Inc. All rights reserved.
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