在液体/液体纳米乳液软接口的分子吸附和物理化学性质:电荷和水性效应的影响
Rubyat J Sara1, Derek Coers1, Charles Behrman1
1Department of Chemistry, Ball State University, Muncie, Indiana 47306, United States.
The journal of physical chemistry. B
|March 18, 2024
概括
有机化合物可以吸附到油在水中的纳米乳液 (NE),由静电和pi相互作用驱动,而不是疏水性. 了解这些吸附行为是NE稳定性和应用的关键.
科学领域:
- 合体和表面化学
- 物理化学 物理化学
- 材料科学 材料科学 材料科学
背景情况:
- 乳液是油和水等不混合液体的混合物,在食品,医药和工业中至关重要.
- 关于油/水界面上的分子相互作用的基本问题仍然存在.
- 了解油在水纳米乳液 (O/W NE) 接口的吸附对于它们的应用和稳定性至关重要.
研究的目的:
- 为了研究在O/W NE接口上的芳香有机化合物的分子吸附.
- 为了确定表面表面活性剂电荷对有机化合物吸附的影响.
- 阐明在O/W NE接口上的分子相互作用背后的驱动力.
主要方法:
- 利用第二波生成 (SHG),一种非线性光散射技术.
- 研究了带电和中性有机染料的吸附平衡.
- 多种表面活性剂的功能组,以改变界面电荷特性.
主要成果:
- 在一些O/W NE接口上观察到分子吸附,即使带有稀疏充电的表面活性剂.
- 静电库伦相互作用在吸附中起着重要的作用.
- 疏水性相互作用不是研究染料的主要驱动因素;pi相互作用可能解释中性芳香化合物积累.
结论:
- 在O/W NE接口的分子吸附受到静电和潜在pi相互作用的组合的影响.
- 带电接口的存在并不能保证分子吸附.
- 吸附行为与NE界面电荷特性密切相关,并影响NE的整体稳定性.
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