Colloidal Jamming Dynamics in Microchannel Bottlenecks

Langmuir : the ACS Journal of Surfaces and Colloids
Zenamarkos B Sendekie, P Bacchin

Abstract

The purpose of this work is to examine the interplay between hydrodynamic conditions and physicochemical interactions from filtration experiments of microparticles. Experiments are performed in microfluidic filters with real-time visualization at pore scale. Both flow rate and pressure are measured with time to analyze the dynamics of pore clogging and permeability. Flux stepping experiments are performed at different physicochemical conditions to determine the different clogging conditions. The results allow distinguishing different clogging behaviors according to filtration conditions which are discussed by considering particle-particle and particle-wall colloidal interactions whose main characteristics are an important repulsive barrier at 0.01 mM, a significant secondary minimum at 10 mM, and low repulsive barrier at 100 mM. Clogging delay at moderate ionic strength and deposit fragility and associated sweeping out of aggregates of particles at high ionic strength are discussed from the deposit structure, specific resistance, and deposit relaxation analyses. It has also been observed that an opening angle at microchannel entrance causes rapid clogging, this effect being more pronounced when the repulsion is partially screen...Continue Reading

References

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Citations

Aug 12, 2016·Scientific Reports·Zenamarkos Bantie SendekiePatrice Bacchin
Nov 2, 2016·Soft Matter·Emilie Dressaire, Alban Sauret
Jul 25, 2019·Scientific Reports·Nandini DebnathMohtada Sadrzadeh
Feb 17, 2018·Physical Review. E·R C HidalgoI Pagonabarraga
Sep 28, 2017·Physical Review. E·Jack D C JacobJacinta C Conrad
Aug 22, 2018·Scientific Reports·Olivier LiotPierre Joseph
Oct 8, 2020·Soft Matter·N DeloucheH Tabuteau
Nov 20, 2020·Scientific Reports·Arne LükenMatthias Wessling
Jun 3, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·P PrakashM Varma
Jun 20, 2021·Scientific Reports·Arne LükenMatthias Wessling

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