The porous media's effect on the permeation of elastic (soft) particles

Benet, Eduard; Badran, Aly; Pellegrino, John; Vernerey, Franck J.

doi:10.1016/j.memsci.2017.04.014

Cited by 23 publications

(16 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We further expect the systems behavior to deviate from our predictions when the droplet concentration increases above the dilute regime. In this situation, the presence of multiple droplets will tend to drastically change the pressure distribution on the network and probably lower the critical pressure for permeation as predicted in a previous study [43]. Further research effort will, therefore, be necessary to fundamentally understand the motion of soft particles or macromolecules in porous media under the action of driving pressure, self-propulsion [64] and more.…”

Section: Discussionmentioning

confidence: 79%

“…We particularly focus on situations where the particles are larger than the average pore opening. In this case, particle deformability becomes an essential component of their transport by allowing them to squeeze through pore constrictions under sufficient pressure forces [15,43]. This mechanism has been used, for instance, for the construction of bubble-based logical circuits [44].…”

Section: Introductionmentioning

confidence: 99%

“…(1) at a = 1.068 (solid line). The inset shows an example of a signature curve for a non-adhesive particle with radius R * = 1.5 using a 3d approximation (solid line) [29], and a 2d one (dashed line) [43]. In it, the normalized equilibrium pressure drop (∆P ) is plotted against the position of the center of mass of the vesicle inside the pore (zc.m.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Mechanical instability and percolation of deformable particles through porous networks

et al. 2018

Self Cite

View full text Add to dashboard Cite

The transport of micron-sized particles such as bacteria, cells, or synthetic lipid vesicles through porous spaces is a process relevant to drug delivery, separation systems, or sensors, to cite a few examples. Often, the motion of these particles depends on their ability to squeeze through small constrictions, making their capacity to deform an important factor for their permeation. However, it is still unclear how the mechanical behavior of these particles affects collective transport through porous networks. To address this issue, we present a method to reconcile the pore-scale mechanics of the particles with the Darcy scale to understand the motion of a deformable particle through a porous network. We first show that particle transport is governed by a mechanical instability occurring at the pore scale, which leads to a binary permeation response on each pore. Then, using the principles of directed bond percolation, we are able to link this microscopic behavior to the probability of permeating through a random porous network. We show that this instability, together with network uniformity, are key to understanding the nonlinear permeation of particles at a given pressure gradient. The results are then summarized by a phase diagram that predicts three distinct permeation regimes based on particle properties and the randomness of the pore network.

show abstract

Section: Discussionmentioning

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Mechanical instability and percolation of deformable particles through porous networks

et al. 2018

Self Cite

View full text Add to dashboard Cite

show abstract

“…However, further increasing of the driving pressure resulted in a decrease in the permeation flux and a higher TOC content in the filtrates, i.e., lower separation efficiencies. This phenomenon was ascribed to the fact that a few tiny droplets were forced to penetrate into the membranes and blocked the channels inside the membrane under excessive driving pressures . The digital photographs and optical microscopic images of the petroleum ether based SFE and SSE before and after separation are shown in Figure c.…”

Section: Resultsmentioning

confidence: 99%

Biomimetic and Superwettable Nanofibrous Skins for Highly Efficient Separation of Oil‐in‐Water Emulsions

Zong

Jin

et al. 2018

Adv Funct Materials

587

263

View full text Add to dashboard Cite

Developing a feasible and efficient separation membrane for the purification of highly emulsified oily wastewater is of significance but challenging due to the critical limitations of low flux and serious membrane fouling. Herein, a biomimetic and superwettable nanofibrous skin on an electrospun fibrous membrane via a facile strategy of synchronous electrospraying and electrospinning is created. The obtained nanofibrous skin possesses a lotus‐leaf‐like micro/nanostructured surface with intriguing superhydrophilicity and underwater superoleophobicity, which are due to the synergistic effect of the hierarchical roughness and hydrophilic polymeric matrix. The ultrathin, high porosity, sub‐micrometer porous skin layer results in the composite nanofibrous membranes exhibiting superior performances for separating both highly emulsified surfactant‐free and surfactant‐stabilized oil‐in‐water emulsions. An ultrahigh permeation flux of up to 5152 L m−2 h−1 with a separation efficiency of >99.93% is obtained solely under the driving of gravity (≈1 kPa), which was one order of magnitude higher than that of conventional filtration membranes with similar separation properties, showing significant applicability for energy‐saving filtration. Moreover, with the advantage of an excellent antioil fouling property, the membrane exhibits robust reusability for long‐term separation, which is promising for large‐scale oily wastewater remediation.

show abstract

“…Soft particles deform when they assume a different shape to adjust to the surrounding environment. Deformation can also be observed in emulsion droplets 2,12 , however, unlike emulsion droplets, soft particles such as microgels are also able to accommodate some of the external pressure by deswelling. Deswelling happens when particles expel solvent, therewith effectively decreasing their volume.…”

Section: Introductionmentioning

confidence: 99%

Conformational changes influence clogging behavior of micrometer-sized microgels in idealized multiple constrictions

Meireles

Bouchoux

Schroën

2019

Sci Rep

View full text Add to dashboard Cite

Clogging of porous media by soft particles has become a subject of extensive research in the last years and the understanding of the clogging mechanisms is of great importance for process optimization. The rise in the utilization of microfluidic devices brought the possibility to simulate membrane filtration and perform in situ observations of the pore clogging mechanisms with the aid of high speed cameras. In this work, we use microfluidic devices composed by an array of parallel channels to observe the clogging behavior of micrometer sized microgels. It is important to note that the microgels are larger than the pores/constrictions. We quantify the clog propensity in relation to the clogging position and particle size and find that the majority of the microgels clog at the first constriction independently of particle size and constriction entrance angle. We also quantify the variations in shape and volume (2D projection) of the microgels in relation to particle size and constriction entrance angle. We find that the degree of deformation increases with particle size and is dependent of constriction entrance angle, whereas, changes in volume do not depend on entrance angle.

show abstract

The porous media's effect on the permeation of elastic (soft) particles

Cited by 23 publications

References 55 publications

Mechanical instability and percolation of deformable particles through porous networks

Mechanical instability and percolation of deformable particles through porous networks

Biomimetic and Superwettable Nanofibrous Skins for Highly Efficient Separation of Oil‐in‐Water Emulsions

Conformational changes influence clogging behavior of micrometer-sized microgels in idealized multiple constrictions

Contact Info

Product

Resources

About