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Benzylated modification and dyeing of ramie fiber in supercritical carbon dioxide
Author(s) -
Liu ZhaoTie,
Sun Zhifeng,
Liu ZhongWen,
Lu Jian,
Xiong Heping
Publication year - 2007
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.27220
Subject(s) - ramie , dyeing , thermogravimetric analysis , supercritical carbon dioxide , materials science , fiber , differential scanning calorimetry , scanning electron microscope , supercritical fluid , fourier transform infrared spectroscopy , composite material , chemical engineering , organic chemistry , chemistry , physics , thermodynamics , engineering
The effects of pretreatment conditions, including the addition of a phase‐transfer catalyst, on the benzylation of ramie fiber were investigated in this study. Raw and benzylated ramie fibers were dyed in supercritical carbon dioxide, and the color strength ( K / S ) of the ramie fiber was measured by ultraviolet–visible spectroscopy. An obviously improved dyeing capability of the benzylated ramie fiber, that is, a better level‐dyeing property and a higher K / S , was achieved. Moreover, the color strength of the ramie fiber, indexed as the value of K / S, increased significantly with the degree of substitution of the benzylated ramie fiber. The raw and modified ramie fibers were characterized with Fourier transform infrared spectroscopy, X‐ray diffraction, scanning electron microscopy, thermogravimetric analysis, and differential scanning calorimetry. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2008