使用电荷双分散性创建高产量的压力粒子载荷油/水接口
Arsalan Abutalebi1, Gordon F Christopher1
1Department of Mechanical Engineering, Whitacre College of Engineering, Texas Tech University, Lubbock, Texas 79409, United States.
Langmuir : the ACS journal of surfaces and colloids
|September 26, 2024
概括
双分散颗粒比单分散颗粒产生更强的皮克林乳液稳定性. 这种接口工程方法提高了粘性弹性和产量应力,可能减少商业和生物医学应用中的颗粒使用.
科学领域:
- 体和接口科学科学
- 材料科学 材料科学 材料科学
- 类风病学 类风病学 类风病学
背景情况:
- 皮克林乳液在油/水接口上的颗粒稳定.
- 目前的方法通常需要高颗粒度才能有效稳定.
- 界面粘弹性起到作用,但硬质障碍通常占主导地位.
研究的目的:
- 调查双分散 (两大小) 带电粒子是否可以在低度 (<50%) 中产生高界面粘弹性产应应力.
- 评估双分散颗粒系统在皮克林乳液稳定中的有效性.
- 为了比较双分散系统与单分散系统和理论模型的性能.
主要方法:
- 在油/水接口上进行了接口风湿学实验.
- 视觉化实验是使用带电乳球 (阿米丁,碳酸盐,硫酸盐涂层) 进行的.
- 一个基于粒子间力量的模型被开发出来,并与实验数据进行比较.
主要成果:
- 与单分散系统相比,双分散粒子系统形成了更多的网络接口结构.
- 在<50%的表面度下,双分散接口表现出比单分散接口大约一级高的粘弹性模块.
- 双分散接口显示可测量的产量应力 (∼10−4 Pa·m),而单分散系统则没有.
- 增强的粘弹性归因于增加的粒子间吸引力,而不是微观结构的变化.
结论:
- 双分散粒子系统可以产生显著的界面粘弹性模块,并在低颗粒表面度下产生应力.
- 这种方法为更高效的皮克林乳液稳定提供了潜在的策略.
- 这些发现表明,在未来的应用中可能需要更少的颗粒,从而降低成本和环境影响.
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