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Effect of Mordanting on the Adsorption Thermodynamics and Kinetics of Cochineal For Wool
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2018-03-15 00:00:00 , DOI: 10.1021/acs.iecr.7b04915 Aleeza Ajmal , Polly R. Piergiovanni 1
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2018-03-15 00:00:00 , DOI: 10.1021/acs.iecr.7b04915 Aleeza Ajmal , Polly R. Piergiovanni 1
Affiliation
In this study, wool fabric was mordanted with alum, copper, or tin, and then dyed with cochineal. Adsorption equilibrium and kinetic studies were conducted at several temperatures to determine mordant effects. The Freundlich isotherm modeled the process, with the mordant affecting both Freundlich constants. The value of the adsorption intensity constant indicated a favorable dyeing process for all mordants. The thermodynamic parameters showed that for all mordants, adsorption is spontaneous and thermodynamically favorable. In addition, the dyeing process is most likely a physisorption process. Finally, the kinetics for mordanted wool are best modeled by a pseudo-first-order equation. The presence of a mordant has a statistically significant effect on the rate constant.
中文翻译:
Mordanting对羊毛对胭脂红的吸附热力学和动力学的影响
在这项研究中,用明矾,铜或锡对羊毛织物进行染色,然后用胭脂红染色。在几个温度下进行吸附平衡和动力学研究,以确定媒染剂作用。Freundlich等温线对过程进行了建模,媒染剂影响了两个Freundlich常数。吸附强度常数的值表明所有媒染剂均具有良好的染色过程。热力学参数表明,对于所有媒染剂,吸附都是自发的,并且在热力学上是有利的。另外,染色过程很可能是物理吸附过程。最后,用伪一阶方程最好地模拟了棉纱的动力学。媒染剂的存在对速率常数具有统计学上的显着影响。
更新日期:2018-03-16
中文翻译:
Mordanting对羊毛对胭脂红的吸附热力学和动力学的影响
在这项研究中,用明矾,铜或锡对羊毛织物进行染色,然后用胭脂红染色。在几个温度下进行吸附平衡和动力学研究,以确定媒染剂作用。Freundlich等温线对过程进行了建模,媒染剂影响了两个Freundlich常数。吸附强度常数的值表明所有媒染剂均具有良好的染色过程。热力学参数表明,对于所有媒染剂,吸附都是自发的,并且在热力学上是有利的。另外,染色过程很可能是物理吸附过程。最后,用伪一阶方程最好地模拟了棉纱的动力学。媒染剂的存在对速率常数具有统计学上的显着影响。