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移动纤维的动态接触角度通过X射线全息测量

Louisa E Kraft^1,2, Jens Lucht³, Fiona Berner^1,2

¹Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany.

Langmuir : the ACS journal of surfaces and colloids

|March 5, 2026

概括

研究人员使用X射线相位对比成像来测量微小玻璃纤维上的动态接触角度. 这种新的方法提供了高分辨率,用于研究涂层等过程中的液体-固体相互作用.

科学领域:

物理物理学物理
材料科学材料科学材料科学
流体动力学流体动力学

背景情况:

潮湿现象,包括动态接触角度,对于印刷和涂料等工业应用至关重要.
目前的光学方法缺乏精确测量所需的空间分辨率,特别是水溶液.
了解微尺度上的动态接触角对于过程优化至关重要.

研究的目的:

开发和演示一种新的X射线成像技术,用于高分辨率测量动态退缩接触角度.
在微观尺度上研究接触线速度与动态退缩接触角之间的关系.
克服现有的光学方法在研究动态湿现象的局限性.

主要方法:

利用X射线相位对比成像 (XPCI) 来实现亚微观分辨率.
在17微米直径的移动玻璃纤维上测量了甘油-Milli-Q水混合物的动态退缩接触角度.
实现了50nm/像素的全息分辨率,空间误差为450nm.

主要成果:

观察到,随着接触线速度在所有测试的液体混合物中增加,动态退缩接触角度下降.
演示了X射线全息图的能力,以解决湿过程的细节.
用前所未有的空间分辨率量化了动态退缩的接触角度.

结论:

X射线全息是一种可行且强大的方法,用于微观地研究动态接触角度现象.
该研究为在动态湿研究中实现更高的空间和时间分辨率开辟了新的途径.
这些发现有助于更好地了解工业相关场景中的湿化动态.

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