化和化表面活性剂的混合
Lars Nordstierna1, István Furó, Peter Stilbs
1Division of Physical Chemistry and Industrial NMR Center, Department of Chemistry, Royal Institute of Technology, SE-10044 Stockholm, Sweden.
Journal of the American Chemical Society
|May 18, 2006
概括
这项研究表明,混合表面活性剂系统表现出偏好的相互作用,而不是完全混合或脱混合. 化和化表面活性剂形成不同的,但同时存在的状结构.
科学领域:
- 物理化学 物理化学
- 体科学 体科学 体科学
- 材料科学 材料科学 材料科学
背景情况:
- 混合表面活性剂系统在各种应用中至关重要.
- 了解混合微粒中的分子相互作用是控制它们属性的关键.
- 之前对 perfluorooctanoate和二硫酸盐混合物的研究表明,关于混合行为的结果是相互矛盾的.
研究的目的:
- 重新检查 perfluorooctanoate 和二硫酸盐混合表面活性剂系统的混合行为.
- 为了确定分子和菌根混合或脱混合的程度.
- 量化表面活性剂类型之间的相互作用能量.
主要方法:
- 核磁共振 (NMR) 光谱学,特别是 (19) F 和 (1) H 化学转移分析.
- 测量两个表面活性剂离子的自我扩散系数.
- 使用框架提取单体度和细胞化学转移的分析.
- 应用正则解理论的第一个近似.
主要成果:
- 实验数据显示,既没有完全脱混合,也没有完全混合.
- 青一种单一的微粒类型,具有优先协调:化表面活性物与化表面活性物相结合,化表面活性物与化表面活性物相结合.
- 混合能量 (欧米茄) 确定为0.98,量化了表面活性剂类型之间的相互作用.
结论:
- 混合表面活性剂系统在单个类型中表现出部分脱.
- 偏好性相互作用决定了这些混合微粒的结构.
- 这项工作为这个和相关的表面活性剂混合物中有争议的混合行为提供了定量解释.
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