Quantifying the trade-off between stiffness and permeability in hydrogels

Gao, Yiwei; Cho, H. Jeremy

doi:10.1039/d2sm01215d

Cited by 7 publications

(11 citation statements)

References 70 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Previously, we investigated the changes in permeability and stiffness with crosslinking and found that any changes in permeability are nearly inverse with any changes in stiffness. 22 Thus, across different crossslinker ratios, the poroelastic diffusion coefficient remains relatively constant, as shown in Fig. S1 (ESI †).…”

Section: Introductionmentioning

confidence: 82%

The role of poroelastic diffusion in the transient wetting behavior of hydrogels

Kashani,

Cho

2024

Soft Matter

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 82%

The role of poroelastic diffusion in the transient wetting behavior of hydrogels

Kashani,

Cho

2024

Soft Matter

Self Cite

View full text Add to dashboard Cite

show abstract

“…2014; Rahbari et al. 2017; Gao & Cho 2022). We compare it with a simpler power-law formulation in Appendix A, showing that the two are qualitatively and quantitatively similar and are expected to produce similar behaviour.…”

Section: Theoretical Modelmentioning

confidence: 99%

“…2014; Rahbari et al. 2017; Gao & Cho 2022 and power law in Holmes & Mow 1990; Ehlers et al. 2009; Sengers et al.…”

Section: Figure 12mentioning

confidence: 99%

Flow and deformation due to periodic loading in a soft porous material

Fiori,

Pramanik,

MacMinn

2023

J. Fluid Mech.

View full text Add to dashboard Cite

Soft porous materials, such as biological tissues and soils, are exposed to periodic deformations in a variety of natural and industrial contexts. The detailed flow and mechanics of these deformations have not yet been systematically investigated. Here, we fill this gap by identifying and exploring the complete parameter space associated with periodic deformations in the context of a one-dimensional model problem. We use large-deformation poroelasticity to consider a wide range of loading periods and amplitudes. We identify two distinct mechanical regimes, distinguished by whether the loading period is slow or fast relative to the characteristic poroelastic timescale. We develop analytical solutions for slow loading at any amplitude and for infinitesimal amplitude at any period. We use these analytical solutions and a full numerical solution to explore the localisation of the deformation near the permeable boundary as the period decreases and the emergence of nonlinear effects as the amplitude increases. We show that large deformations lead to asymmetry between the loading and unloading phases of each cycle in terms of the distributions of porosity and fluid flux.

show abstract

“…It is evident that a trade-off relationship exists between some of the mechanical properties (such as compressive modulus) and transport properties for separation membranes, and the improvement of transport properties through increased porosity inevitably leads to a compromise in compressive modulus and vice versa . The same issue also limits the application of a broad range of functional materials involving macroporous polymers, such as biological scaffolds in tissue engineering, − hydrogels, − polymer foam armors, and heat-transfer porous materials . In all of these applications, it is crucial for the porous polymer to possess both mechanical robustness and sufficient porosity to facilitate fast transport or permeation, ,,− but this trade-off phenomenon has not been fully elucidated.…”

Section: Introductionmentioning

confidence: 99%

Thin-Film Composite Membrane Compaction: Exploring the Interplay among Support Compressive Modulus, Structural Characteristics, and Overall Transport Efficiency

Xu,

Wang,

et al. 2024

Environ. Sci. Technol.

View full text Add to dashboard Cite

Water scarcity has driven the demand for water production from unconventional sources and the reuse of industrial wastewater. Pressure-driven membranes, notably thinfilm composite (TFC) membranes, stand as energy-efficient alternatives to the water scarcity challenge and various wastewater treatments. While pressure drives solvent movement, it concurrently triggers membrane compaction and flux deterioration. This necessitates a profound comprehension of the intricate interplay among compressive modulus, structural properties, and transport efficacy amid the compaction process. In this study, we present an all-encompassing compaction model for TFC membranes, applying authentic structural and mechanical variables, achieved by coupling viscoelasticity with Monte Carlo flux calculations based on the resistance-in-series model. Through validation against experimental data for multiple commercial membranes, we evaluated the influence of diverse physical parameters. We find that support polymers with a higher compressive modulus (lower compliance), supports with higher densities of "fingerlike" pores, and "sponge-like" pores with optimum void fractions will be preferred to mitigate compaction. More importantly, we uncover a trade-off correlation between steady-state permeability and the modulus for identical support polymers displaying varying porosities. This model holds the potential as a valuable guide in shaping the design and optimization for further TFC applications and extending its utility to biological scaffolds and hydrogels with thin-film coatings in tissue engineering.

show abstract

Quantifying the trade-off between stiffness and permeability in hydrogels

Abstract: Hydrogels have a distinct combination of mechanical and water-transport behaviors. As hydrogels stiffen when they de-swell, they become less permeable. Here, we combine de Gennes' semi-dilute polymer theory with the...

Cited by 7 publications

References 70 publications

The role of poroelastic diffusion in the transient wetting behavior of hydrogels

The role of poroelastic diffusion in the transient wetting behavior of hydrogels

Flow and deformation due to periodic loading in a soft porous material

Thin-Film Composite Membrane Compaction: Exploring the Interplay among Support Compressive Modulus, Structural Characteristics, and Overall Transport Efficiency

Contact Info

Product

Resources

About