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Related Experiment Video

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Layer Microdissection of Tricuspid Valve Leaflets for Biaxial Mechanical Characterization and Microstructural Quantification

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Published on: February 10, 2022

Imbibition on a porous layer: dynamical and mechanical characterization.

Marguerite Léang¹, Ludovic Pauchard, Lay-Theng Lee

¹Laboratoire F. A. S. T., Univ. Paris-Sud, CNRS, Université Paris-Saclay, F-91405, Orsay, France. fred@fast.u-psud.fr.

|February 16, 2019

Summary

Solvent penetration in porous materials was studied. The research revealed universal behaviors and a new viscous component, crucial for understanding material properties without damage.

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Area of Science:

Materials Science
Physics of Porous Media
Rheology

Background:

Understanding solvent penetration in porous materials is vital for applications like conservation and manufacturing.
Previous studies often lack detailed analysis of the dynamic and mechanical interplay during solvent imbibition.

Purpose of the Study:

To analyze solvent penetration dynamics and mechanical changes in porous layers.
To identify universal behaviors and characteristic times governing solvent imbibition.
To investigate the role of solvent penetration in altering material properties.

Main Methods:

Dynamic analysis of solvent drop spreading on porous substrates.
Mechanical characterization using indentation testing during imbibition.
Direct visualization of drop and wet zone evolution.

Main Results:

Identified three distinct regimes of solvent imbibition.
Demonstrated universal behavior across various porous systems and solvents.
Showed that solvent penetration introduces a viscous component, with a characteristic time dependent on solvent and substrate.
Observed recovery of initial mechanical properties without swelling or cracking.

Conclusions:

Solvent penetration significantly influences the mechanical properties of porous materials.
The absence of swelling or cracking suggests that visco-plastic properties are necessary for these phenomena.
The findings provide insights into material conservation and the design of porous systems.