Dye uptake and partition ratio of disperse dyes between a PET yarn and supercritical carbon dioxide
Dye uptake and partition ratio of disperse dyes between a PET yarn and supercritical carbon dioxide
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DOI：
10.1016/j.supflu.2005.07.001
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发表时间：
2006-02-01
影响因子：
3.9
通讯作者：
Sicardi, S
中科院分区：
文献类型：
--
作者：
Ferri, A;Banchero, M;Sicardi, S
在超临界二氧化碳存在下，测定了三种分散偶氮染料在涤纶纱线上的平衡上染率。在测试的操作条件下，染料上染率对温度比对压力敏感得多。纤维和超临界流体之间的平衡分配系数是由先前测量的溶解度数据估算的[A.Ferri，M.Banchero，L.Manna，S.Sicardi，一种测量染料在超临界二氧化碳中的高溶解度的实验技术，J.Supercrit。流体30(2004)41；A.Ferri，M.Banchero，L.Manna，S.Sicardi，偶氮化合物和蒽醌衍生物在超临界二氧化碳中的溶解度的新关联，J.Supercrit。流体32(2004)27]。分配系数的高值表明染料在流体和聚合物之间的分配是评价超临界二氧化碳染色工艺可行性的重要参数。分配系数由Funazukuri等人提出的方程关联。具有四个拟合参数的[Ind.英语。化学。Res.41(2002)2812]；假设染料在山药中的朗缪尔型吸收，建立了具有五个拟合参数的半经验方程；以及从简单的实验数据观察得出具有三个拟合参数的经验方程。与第二个半经验方程的一致性最好。第三个经验公式也得到了较好的结果，与实验数据的一致性好于Funazukuri等人提出的公式。即使它使用的拟合参数少了一个。(C)2005 Elsevier B.V.保留所有权利。
The equilibrium uptake of three disperse azoic dyes in a commercial PET yarn in presence of supercritical carbon dioxide was measured. The dye uptake was found to be much more sensitive to temperature than to pressure in the tested operative conditions. The equilibrium partition coefficient between the fibre and the supercritical fluid was evaluated from previously measured solubility data [A. Ferri, M. Banchero, L. Manna, S. Sicardi, An experimental technique for measuring high solubilities of dyes in supercritical carbon dioxide, J. Supercrit. Fluids 30 (2004) 41; A. Ferri, M. Banchero, L. Manna, S. Sicardi, A new correlation of solubilities of azoic compounds and anthraquinone derivatives in supercritical carbon dioxide, J. Supercrit. Fluids 32 (2004) 27]. The high values of the partition coefficients demonstrated that the partition of the dye between the fluid and the polymer is an important parameter to evaluate the feasibility of the dyeing process in supercritical carbon dioxide.The partition coefficients were correlated with three equations: an equation proposed by Funazukuri et al. with four fitting parameters [Ind. Eng. Chem. Res. 41 (2002) 2812]; a semi-empirical equation, with five fitting parameters, that was developed assuming a Langmuir-type absorption of the dyes into the yam; and an empirical equation, with three fitting parameters, developed from simple experimental data observation. The best agreement was obtained with the second, semi-empirical equation. Good results were also obtained with the third, empirical equation and the agreement with experimental data was better than that obtained with the equation proposed by Funazukuri et al. even though it makes use of one fitting parameter less. (C) 2005 Elsevier B.V. All rights reserved.