使用商业微尺度热泳仪器的溶液组成依赖索雷特系数
Praneetha Pulyala1, Meng Jing2, Wei Gao2
1Department of Bioengineering, Lehigh University Bethlehem PA 18015 USA xuc207@lehigh.edu.
RSC advances
|June 1, 2023
概括
液体中的粒子迁移 (热泳) 取决于液体的特性. 这项研究量化了合体中的热泳,揭示了其对介质组成,pH值和盐度的敏感性,为复杂系统中的粒子行为提供了新的见解.
科学领域:
- 体和接口科学科学
- 物理化学 物理化学
- 材料科学是一种材料科学.
背景情况:
- 在温度梯度 (热泳) 中的粒子迁移对于理解体行为至关重要.
- 分散介质的特性显著影响热扩散.
- 对于复杂的系统,现有的量化热泳的方法需要进一步精细化.
研究的目的:
- 开发一种方法来量化使用微尺度热泳 (MST) 的温度梯度中的粒子迁移.
- 为了研究分散介质组成,pH值,阳离子表面活性剂和盐度对热泳性行为的影响.
- 开发一种用于提取索雷特系数 (ST) 的数学模型,并了解复杂系统中的热泳行为.
主要方法:
- 使用商业仪器来诱导和测量热泳.
- 采用微尺度热泳法 (MST) 来量化碳酸盐修饰聚乙烯颗粒在水性悬浮中的热泳迁移.
- 开发了一个数学模型,从MST数据中提取索雷特系数 (ST).
主要成果:
- 量化了合体的热泳迁移及其对介质组成,pH值和盐度的依赖.
- 索雷特系数 (ST) 测量与德拜长度和表面电荷密度相关,受介质组成的影响.
- 观察到热恐惧/热爱行为受到缓冲离子的热电效应的影响.
结论:
- 开发的方法准确量化了热泳,并提供了与理论一致的索雷特系数 (ST) 值.
- 粒子热泳对溶剂性质非常敏感,包括离子强度和组成.
- 引入了一种适用于复杂系统的新分析模型,以理解热泳作为溶剂性质的函数.
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