Journal
CARBOHYDRATE POLYMERS
Volume 74, Issue 2, Pages 250-256Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2008.02.006
Keywords
amino-terminated hyperbranched polymer; salt-free dyeing; oxidized cotton fiber; graft
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Funding
- Institutions of Higher Education of China [20060285004]
- Jiangsu Province China [CX07B_151z]
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In order to achieve salt-free dyeing on cotton fiber with reactive dyes, an amino-terminated hyperbranched polymer (HBP-NH2) grafted cotton fiber (HGCF) was prepared by the oxidation of cotton fiber with sodium periodate in water and subsequent grafted with an aqueous solution of HBP-NH2. Fourier transform infrared spectrophotometry (FTIR) of the HGCF indicated that all aldehyde groups of the oxidized cotton fiber have reacted with amino groups of the HBP-NH2. As a result, the HGCF fabrics prepared under the optimum conditions displayed markedly enhanced colour strength when dyed with reactive dyes using salt-free dyeing. The washing fastness, rubbing fastness and levelling properties of the dyed HGCF fabrics were also good compared with those obtained by conventional dyeing. The zeta-potential of the HGCF in liquid phase was tested and found to be positive at pHs lower than 6.5. The dyeing behaviour of Reactive Brilliant Yellow A-4GLN on the HGCF was found to follow a Langmuir-type adsorption curve. (C) 2008 Elsevier Ltd. All rights reserved.
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