Bending elasticity of adsorbed oil-water interfaces: direct measurement and relevance to oil sands engineering

吸附油水界面的弯曲弹性：直接测量及其与油砂工程的相关性

• 批准号: 238219-2008
• 负责人: Yeung, Anthony
• 金额: $ 1.68万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2012
• 资助国家: 加拿大
• 起止时间: 2012-01-01 至 2013-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=496748
• 关键词: Bending; elasticity; adsorbed; oil; water

It is well known that oil and water do not mix. However, if an appropriate concoction of surfactants (similar to soap molecules) were added to the system, it is possible for the immiscible liquids to blend on the nanometre scale, effectively forming a homogeneous solution. This blending of oil and water can find important applications in such diverse areas as oil sands engineering, food science, and drug delivery. The physical property which controls the nano-scale blending of oil and water is the bending stiffness of the interface (i.e. the dividing surface between oil and water). In this project, novel micromechanical techniques will be developed to quantify the bending stiffness of the liquid interface. The experiments will be conducted on the micrometre length scale (about one tenth the thickness of a human hair), and the procedure will involve analysing the random fluctuations of a very flexible interfacial surface. By balancing the randomizing effect (temperature) with the restoring force (bending resistance of the interface), it is possible to calculate the bending stiffness of the liquid interface.

众所周知，油和水不能混合。 然而，如果将适当的表面活性剂混合物（类似于肥皂分子）添加到系统中，则不混溶的液体可以在纳米尺度上混合，有效地形成均匀的溶液。 这种油和水的混合可以在油砂工程、食品科学和药物输送等不同领域找到重要的应用。 控制油和水的纳米级混合的物理性质是界面（即油和水之间的分界面）的弯曲刚度。 在这个项目中，将开发新的微机械技术来量化液体界面的弯曲刚度。 实验将在微米长度尺度上进行（约为人类头发厚度的十分之一），程序将涉及分析非常灵活的界面表面的随机波动。 通过平衡随机化效应（温度）与恢复力（界面的抗弯曲性），可以计算液体界面的弯曲刚度。