Issue 35, 2020
From the journal:

Soft Matter

Poroelasticity of highly confined hydrogel films measured with a surface forces apparatus†

George D. Degen, ORCID logo *a   Yen-Tsung Chen, ORCID logo a   Allison L. Chau, ORCID logo b   Lisa K. Månsson ORCID logo c  and  Angela A. Pitenis ORCID logo b  

* Corresponding authors

a Department of Chemical Engineering, University of California, Santa Barbara, Santa Barbara, CA 93106, USA
E-mail: gdegen@ucsb.edu

b Materials Department, University of California, Santa Barbara, Santa Barbara, CA 93106, USA

c Department of Physics, Chalmers University of Technology, SE-412 96 Gothenburg, Sweden

Abstract

The influence of poroelasticity on the contact mechanics of thin polyacrylamide films was investigated with a surface forces apparatus (SFA). A model based on a thin film approximation described compression forces for hydrated gels; polymer scaling theory explained the effects of gel dehydration. The results demonstrate that fluid flow dictates the apparent stiffness of highly confined poroelastic films.

Graphical abstract: Poroelasticity of highly confined hydrogel films measured with a surface forces apparatus

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Article information

DOI
https://doi.org/10.1039/D0SM01312A
Article type
Communication
Submitted
18 Jul 2020
Accepted
26 Aug 2020
First published
27 Aug 2020

Soft Matter, 2020,16, 8096-8100

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Poroelasticity of highly confined hydrogel films measured with a surface forces apparatus

G. D. Degen, Y. Chen, A. L. Chau, L. K. Månsson and A. A. Pitenis, Soft Matter, 2020, 16, 8096 DOI: 10.1039/D0SM01312A

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