Effect of DP finishing methods on sorption of dyes by cellulose

Yiqi Yang, Tian Lan, Shiqi Li

Research output: Contribution to journalArticle

12 Scopus citations

Abstract

More than 70% of the dyeability of cotton is lost when treated with 1% DMDHEU, which is not proportional to the decrease in pore volume of the crosslinked fiber. Although cotton fabric is difficult to dye after being treated with 3% DMDHEU, a subsequent treatment with 6% additional DMDHEU and 6% triethanolamine (TEA) greatly increases the dye sorption. This secondary DMDHEU-TEA treatment cannot open the pores which were closed by the primary DMDHEU crosslinking reaction. Results show that the change of cellulose surface properties after DP finishing was more important than the change of pore volume to the observed decrease in dye sorption. The substantivity of dyes for cellulosics relies on the coplanarity between the dye and the fiber. Crosslinks on the dye-accessible surface destroyed such coplanarity, therefore the dye sorption was decreased.

Original languageEnglish (US)
Pages (from-to)29-33
Number of pages5
JournalTextile Chemist and Colorist
Volume27
Issue number2
StatePublished - Feb 1995

ASJC Scopus subject areas

  • Chemical Engineering(all)

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