Benzylated modification and dyeing of ramie fiber in supercritical carbon dioxide |
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| Authors: | Zhao‐Tie Liu Zhifeng Sun Zhong‐Wen Liu Jian Lu Heping Xiong |
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| Affiliation: | 1. Key Laboratory of Applied Surface and Colloid Chemistry, Shaanxi Normal University, Ministry of Education, Xi'an 710062, People's Republic of China;2. School of Chemistry and Materials Science, Shaanxi Normal University, Xi'an 710062, People's Republic of China;3. Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, Changsha 410205, People's Republic of China |
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| Abstract: | 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 |
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| Keywords: | biofibers degree of polymerization (DP) dyes/pigments modification morphology |
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