Journal Article

PUBDB-2024-06320

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Deformation Dynamics of Nanopores upon Water Imbibition

Juan, S. ; Dammann, L.CFEL*Extern*DESY* ; Gallardo Dominguez, L.Extern* ; Li, Z.CFEL*DESY* ; Froeba, M.Extern* ; Meissner, R.Extern* ; Stone, H. ; Huber, P. (Corresponding author)Extern*DESY*

2024
National Acad. of Sciences Washington, DC

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Please use a persistent id in citations: doi:10.1073/pnas.2318386121  doi:10.3204/PUBDB-2024-06320

Report No.: arXiv:2311.13025

Abstract: Capillarity-driven transport in nanoporous solids is ubiquitous in nature and is of increasing importance for the functionality of modern liquid-infused engineering materials. During imbibition, highly curved menisci are driven by negative Laplace pressures of several hundred atmospheres, exerting an enormous contractile load on an increasing portion of the porous matrix. Due to the challenge of simultaneously monitoring imbibition and deformation with high spatial resolution, the resulting coupling of solid elasticity to liquid capillarity has remained largely unexplored. Here, we study water imbibition in mesoporous silica using optical imaging, gravimetry, and high-resolution dilatometry. In contrast to an expected Laplace pressure-induced contraction, we find a square-root-of-time expansion and an additional abrupt length increase when the menisci reach the top surface. The final expansion is absent when we stop the imbibition front inside the porous medium in a dynamic imbibition-evaporation equilibrium, as is typical for water transport and transpiration in plants. These peculiar deformation behaviors are validated by single-nanopore molecular dynamics simulations and described by a continuum model that highlights the importance of expansive surface stresses at the pore walls (Bangham effect) and the buildup or release of contractile Laplace pressures as nanoscale menisci collectively advance, arrest, or disappear. Our model predicts that these observations are valid not only for water imbibition in silica, but for any imbibition process in nanopores, regardless of the liquid/solid combination. This also suggests that simple deformation measurements can be used to quantify surface stresses and Laplace pressures or transport in a wide variety of natural and artificial porous media.

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Contributing Institute(s):

1. CIMMS-RA Center for integr. Multiscale M (CIMMS)

Research Program(s):

1. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)
2. SFB 986 B07 - Polymere in grenzflächenbestimmten Geometrien: Struktur, Dynamik und Funktion an planaren und in porösen Hybridsystemen (B07) (318019437) (318019437)
3. HIDSS-0002 - DASHH: Data Science in Hamburg - Helmholtz Graduate School for the Structure of Matter (2019_IVF-HIDSS-0002) (2019_IVF-HIDSS-0002)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2024

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Database coverage:
; ; ; BIOSIS Previews ; Biological Abstracts ; Clarivate Analytics Master Journal List ; Current Contents - Agriculture, Biology and Environmental Sciences ; Current Contents - Life Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 10 ; JCR ; National-Konsortium ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection ; Zoological Record

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Preprint Juan, S. ; Dammann, L.CFEL*Extern*DESY* ; Gallardo Dominguez, L.Extern* ; Li, Z.CFEL*DESY* ; Froeba, M.Extern* ; Meissner, R.Extern* ; Stone, H. ; Huber, P. (Corresponding author)Extern*DESY*
Deformation Dynamics of Nanopores upon Water Imbibition
[10.3204/PUBDB-2023-07691]     Files  Fulltext Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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