BPCPPDYSOE21 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 1: Wetting - organized by Stefan Karpitschka (Max Planck Institute for Dynamics and Self-Organization, Göttingen) (joint session CPP/DY)

DY 1.13: Vortrag

Montag, 22. März 2021, 15:20–15:40, CPPb

Imbibition-Induced Deformation Dynamics in Nanoporous Media — •Juan Sanchz¹, Zhuoqing Li², Michael Froeba³, and Patrick Huber⁴ — ¹Institute of Materials Physics, Hamburg University of Technology — ²Institute of Materials Physics, Hamburg University of Technology — ³Institute of Anorganic and Applied Chemistry, Hamburg University — ⁴Institute of Materials Physics, Hamburg University of Technology

We present time-dependent macroscopic dilatometry experiments on the deformation of nanoporous monoliths (carbon and silica) upon spontaneous, capillarity-driven invasion of water. We find two distinct dynamical regimes. One of them can be quantitatively traced to deformations originating in changes in the surface stress at the inner pore walls (dynamic Bangham's regime) upon water invasion, whereas the second one results from Laplace pressure effects. Our study demonstrates that it is possible to dynamically monitor imbibition dynamics by simple dilatometry measurements.