Clean fixation of dye on cotton in supercritical carbon dioxide with a heterogeneous and phase transfer catalytic reaction

Jia Jie Long, Chuang Long Cui, Yan Qin Zhang, Guo Hao Yuan

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

A clean fixation of disperse reactive dye on cotton was investigated by employing a heterogeneous and phase transfer catalytical reaction with a phase transfer agent in a liquid-supercritical-solid triphase system, as an environmentally friendly alternative to conventional and heavy pollutional wet-chemical process. The catalytic fixation reaction was characterized by color intensity, fixation efficiency and Fourier transform infrared spectrometry (FT-IR), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM). The results show that the dye fixation through a nucleophilic addition at a solid cellulosic polymer substrate phase could be effectively facilitated as the transportation of the anion of OH- or CO32- by the phase transfer catalyst of FC-134 from a liquid phase to supercritical phase and then onto the solid substrate in a self-built reactor. A heterogeneous and triphase transfer catalytic reaction mechanism was also supposed for the dye fixation at the solid substrate in supercritical carbon dioxide fluid with the presence of a base.

Original languageEnglish
Pages (from-to)88-95
Number of pages8
JournalDyes and Pigments
Volume115
DOIs
Publication statusPublished - 2015 Dec 24

Keywords

  • Catalytic reaction mechanism
  • Clean fixation
  • Cotton
  • Phase transfer catalysis
  • Reactive disperse dye
  • Supercritical carbon dioxide

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Process Chemistry and Technology

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