Effect of disperse dye structure on dye sorption onto PLA fiber

David Karst, Digvijay Nama, Yiqi Yang

Research output: Contribution to journalArticlepeer-review

48 Scopus citations


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 {single bond}N(C2H4OCOCH3)2, {single bond}(CO)2NC3H6OCH3, {single bond}SO2NHC6H5, {single bond}NO2, {single bond}CN(NH)C6H4, and {single bond}CH(CO)2C6H4, and the groups that form the weakest interactions with PLA are {single bond}Br and {single bond}Cl.

Original languageEnglish (US)
Pages (from-to)106-111
Number of pages6
JournalJournal of Colloid and Interface Science
Issue number1
StatePublished - Jun 1 2007


  • Adsorption
  • Disperse dyes
  • Functional groups
  • Intermolecular interactions
  • Molecular modeling
  • PLA
  • Poly(lactic acid)
  • Polylactide

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry


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