一个动态的 calo-porosimeter 标志着湿和干燥过程在冷的纳米孔
Loïc Michel1, Jérôme Giraud1, William Chèvremont1
1Univ. Grenoble Alpes, CNRS, LIPhy, f-38000 Grenoble, France.
The Review of scientific instruments
|October 29, 2024
概括
一个新的动态卡洛-孔径计使孔隙填充和排空的同时机械和热量测量特征. 该仪器提供了对各种时间和温度的湿和干动态的见解.
科学领域:
- 纳米流体和多孔媒体科学
- 物理化学和热力学.
- 材料科学与工程 材料科学与工程
背景情况:
- 在非湿液体中含有纳米孔状颗粒的淋性异质系统对于研究湿,干燥和纳米封闭中的运输至关重要.
- 现有的高压 (几十MPa) 孔隙填充/排空的准静态研究限制了对动态现象的理解.
- 动态测量对于充分阐明控制这些纳米封闭过程的复杂物理是必不可少的.
研究的目的:
- 引入一种新型的动态热孔测量仪,用于同时机械和热量测量对空性多孔系统的表征.
- 为了能够研究填充和排空周期在广泛的时间尺度 (毫秒到秒) 和温度 (-5到70°C) 上.
- 为了促进湿化动态的调查,溶液度效应,和热性质,如湿化的热量.
主要方法:
- 开发和实施一个热调节的动态热孔测量仪.
- 在填充和排空周期期间同时进行机械和热量计测量.
- 在四个十年的时间尺度 (毫秒到10秒) 和可变温度控制中运行.
主要成果:
- 该装置成功地表征了冷多孔系统中填充和空化的动态.
- 它允许研究受溶液度影响的湿化动力学和缓慢动力学.
- 证明了热性质的快速测量,例如湿的热量.
结论:
- 动态卡洛-孔径计为研究纳米封闭液体中复杂现象提供了强大的工具.
- 它弥合了准静态和动态研究之间的差距,为湿和干燥过程提供了新的见解.
- 该仪器的多功能性允许对不同液体进行连续研究,从而扩大了其适用性.
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