Sorption of Fluorinated Azo Dyes Containing Two Sulfonate Groups by a Nylon 6 Film
Sorption of Fluorinated Azo Dyes Containing Two Sulfonate Groups by a Nylon 6 Film
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尼龙 6 薄膜对含有两个磺酸盐基团的氟化偶氮染料的吸附
DOI：
10.2115/fiber.55.12_584
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
H. Shirai
中科院分区：
文献类型：
--
作者：
K. Hamada;Ken;H. Shirai
制备了1-苯基偶氮-2-羟基- 3,6 -萘二磺酸二钠衍生物，其中一些衍生物含有三氟甲基或甲基，并研究了它们在pH3下被尼龙6薄膜吸附的行为。尼龙6膜对染料的吸收率随吸附时间的增加呈线性增加。线性图的斜率随染料结构的不同而变化：染料中取代基的种类和数量影响斜率。基于配分吸附和Langmuir吸附双吸附机理的吸附等温线分析，给出了Langmuir吸附的配分系数（KP）、结合位点数(n)和本征结合常数（KL）。在染料分子中引入三氟甲基或甲基对KP和n的影响不大，但对KL值的影响较大。取代基的替换对Langmuir型吸附的热力学参数焓变和熵变有较大影响，表明疏水相互作用与Langmuir型吸附有关。
Derivatives of disodium 1-phenylazo-2-hydroxy-3, 6-naphthalenedisulfonate, some of which contain a trifluoromethyl or methyl group, were prepared and their sorption behavior by a nylon 6 film at pH3 was investigated. The dye uptake by the nylon 6 film increased linearly with sorption time. The slopes of the linear plots varied depending on the dye structure: the kind and number of the substituents in the dyes affected the slopes. The analysis of the sorption isotherms based on a dual sorption mechanism, which consists of partition and Langmuir type sorption, gave the partition coefficients (KP) and the number of binding sites (n) and intrinsic binding constants (KL) for the Langmuir type sorption. The introduction of the trifluoromethyl or methyl group into the dye molecules hardly influenced KP and n, while it changed the KL values significantly. Furthermore, thermodynamic parameters, enthalpy change and entropy change, for the Langmuir type sorption were greatly affected by the replacement of the substituents, suggesting that the hydrophobic interaction should be concerned with the Langmuir type sorption.