热力学解释了溶液组成如何影响随机冰核的动力学
Leif-Thore Deck1, Lisanne Wittenberg1, Marco Mazzotti1
1Institute of Energy and Process Engineering, ETH Zurich, 8092 Zurich, Switzerland.
The journal of physical chemistry letters
|June 22, 2023
概括
水溶液中的冰核化动力学独立于溶液类型和度. 这一发现适用于毫升尺度的体积,对于生物制药冷过程至关重要.
科学领域:
- 物理化学 物理化学
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 冰核化在冷过程中至关重要,特别是在生物制药方面.
- 目前的理解往往依赖于微滴研究,限制了对较大体积的适用性.
研究的目的:
- 在毫升尺度水溶液中研究冰核化动力学.
- 为了确定溶解物类型和度是否影响核化动力学.
- 为了验证生物制药制造的发现.
主要方法:
- 在10个水溶液中以毫升尺度研究冰核形成.
- 收集了大约6000个核形成事件的数据.
- 统计分析了核化动力学和估计的动力学参数.
主要成果:
- 冰核化动力学证明独立于溶液的性质和度.
- 一组单一的动力参数在所有测试的溶液中定量描述了核化行为.
- 这种独立性不论所使用的热力学驱动力 (化学潜力,水活动或超冷却) 是真的.
结论:
- 在毫升尺度上,溶解物对冰核化动力学的影响是可以忽略不计的.
- 这些发现支持将微滴核化数据推广到更大的体积.
- 核化速率的简化表达式可以用于制药冷模型.
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