An adsorption and thermodynamic study of lac dyeing on cotton pretreated with chitosan
An adsorption and thermodynamic study of lac dyeing on cotton pretreated with chitosan
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DOI：
10.1016/j.dyepig.2005.08.002
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发表时间：
2007
影响因子：
4.5
通讯作者：
S. Rattanaphani;M. Chairat;J. Bremner;V. Rattanaphani
中科院分区：
文献类型：
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作者：
S. Rattanaphani;M. Chairat;J. Bremner;V. Rattanaphani
在pH值为3.0，料液比为1：100，接触时间为3h的条件下，研究了壳聚糖预处理棉对紫胶染色的吸附和热力学。批平衡研究表明，经壳聚糖预处理的棉对紫胶染料的吸附符合Langmuir等温式，吸附焓变ΔHo为−17.43kJ。用壳聚糖预处理的棉花提供了显着增强的染料上染到棉花上，也减少了从棉花解吸的染料相比，在没有壳聚糖或紫胶染色在NaCl的存在下的结果。此外，氯化钠在pH 2.5、3.0和3.5时对紫胶染料在棉上的吸附没有影响。结果表明，在染色过程中，氢离子（H+）比钠离子（Na+）起着更重要的作用。
Adsorption and thermodynamic studies of lac dyeing on cotton pretreated with chitosan were investigated under dyeing conditions of pH 3.0, a material to liquor ratio (MLR) of 1:100 and a contact time of 3h. Batch equilibrium studies showed that the adsorption of lac dye on cotton pretreated with chitosan could be described by the Langmuir isotherm with an enthalpy change (ΔHo) of −17.43kJ. The pretreatment of cotton with chitosan provided a significant enhancement of dye uptake onto the cotton and also a decrease in the dye desorbed from the cotton compared with the results in the absence of chitosan or on lac dyeing in the presence of NaCl. In addition, sodium chloride had no effect on the adsorption of lac dye on cotton at pH 2.5, 3.0 and 3.5. It indicated that hydrogen ions (H+) play a more important role than sodium ions (Na+) in the dyeing process.