非离子CE表面活性剂的表面状态方程
Shi-Yow Lin1, Ya-Chi Lee1, Ming-Wei Yang1
1Department of Chemical Engineering, National Taiwan University of Science and Technology, 43 Keelung Road, Sec. 4, Taipei, 106 Taiwan, and Department of Chemical Engineering, National Taiwan University, 1 Roosevelt Road, Sec. 4, Taipei, 106 Taiwan.
Langmuir : the ACS journal of surfaces and colloids
|October 26, 2023
概括
这项研究表明,表面张力与表面度 (γ(Γ)) 数据对分析表面活性剂吸附动力学来说比γ(Γ/Γref) 更有效. 这种方法改善了吸附异热的确定,并揭示了吸附表面活性剂分子之间的显著相互作用.
科学领域:
- 合体和表面科学科学
- 物理化学 物理化学
- 表面活性剂科学 表面活性剂科学
背景情况:
- 表面状态方程 (γ vs Γ/Γref) 已被用来研究非离子表面活性剂的吸附动力学,如C12E6和C14E8.
- 之前的研究应用了γ(Γ/Γref) 关系来确定吸附等热量及其参数.
研究的目的:
- 评估γ(Γ) 数据在研究非离子聚氧乙烯表面活性剂的吸附动力学和异温的作用.
- 为了比较γ(Γ) 与γ(Γ/Γref) 和γ(ln C) 的有效性,进行吸附分析.
- 为了确定吸附异温,模型参数,控制机制和表面活性剂的扩散性.
主要方法:
- 来自吊泡快速膨胀的实验数据.
- 使用平衡表面张力数据 (C) 和吉布斯吸附方程,对 Γref 的评价.
- 对六种非离子型聚氧乙烯表面活性剂和两种酒精的平衡gC) 和动态gT) 数据的分析.
主要成果:
- 对于吸附动力学来说, γ 与 Γ 的依赖性比 γ 更加敏感和具有信息性.
- γ(Γ) 数据显著有助于确定吸附同热量,模型参数,控制机制和表面活性剂扩散性.
- 将γ(Γ) 与γ(ln C) 数据结合起来,可以为吸附行为分析提供更好的结果.
结论:
- 兰木尔等热法对于描述研究的非离子表面活性剂的吸附是不够的.
- 吸附表面活性剂分子之间存在显著的相互作用.
- 该数据提供了一个更强大的方法来理解表面活性剂吸附现象.
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