估计固体离子表面活性剂的表面自由能量和可溶性参数
Feixue Gong1, Na Du1, Wanguo Hou2
1Key Laboratory for Colloid and Interface Chemistry (Ministry of Education), Shandong University, Jinan 250100, PR China.
Journal of colloid and interface science
|September 7, 2025
概括
在离子表面活性剂中,表面自由能量 (γ) 和可溶性 (δ) 参数随着更长的基链而下降. 总表面自由能量 (γt) 与临界微粒和和度的表面张力 (σ) 有正相关.
科学领域:
- 物理化学 物理化学
- 表面科学是一门学科.
- 体科学 体科学 体科学
背景情况:
- 表面自由能量 (γ) 和溶解度 (δ) 是重要的物理化学参数.
- 对于表面活性剂中这些参数的数据有限.
- 了解这些特性是表面活性剂应用的关键.
研究的目的:
- 确定离子表面活性剂的γ和δ参数.
- 调查头组类型和基链长度对这些参数的影响.
- 探索g,d和表面张力 (σ) 之间的相关性.
主要方法:
- 使用接触角 (θ) 和介电常数 (ε) 方法估计 γ 和 δ 参数.
- 对头组和链长度 (n) 的参数依赖性的分析.
- 与临界微粒度 (σcmc) 和和 (σsat) 的表面张力进行相关性分析.
主要成果:
- 对于24种离子表面活性剂,获得了γ和δ值.
- 所有γ和δ参数都随着基链长度 (n) 的增加而线性下降,而不论头部组.
- 总表面自由能量 (γt) 与σcmc和σsat呈现出正线性相关性.
结论:
- 在离子表面活性剂中,基链长度是 γ 和 δ 的主要决定因素.
- 表面自由能量与表面活性剂溶液的表面张力直接相关.
- 这项研究提高了对表面活性剂基本性质的理解.
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