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Jamming of cellulose ether solutions in porous medium
Author(s) -
Marlière Claire,
Faure Paméla,
Coussot Philippe,
Vlassopoulos Dimitris,
Larsen Antje,
Loppinet Benoit
Publication year - 2015
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.14920
Subject(s) - rheometry , filtration (mathematics) , materials science , cellulose , dynamic light scattering , jamming , chemical engineering , aqueous solution , light scattering , porosity , porous medium , polymer , composite material , scattering , nanotechnology , chemistry , optics , organic chemistry , nanoparticle , thermodynamics , statistics , physics , mathematics , engineering
The flow of aqueous cellulose ether solutions through a bead packing is investigated using magnetic resonance imaging and filtration measurements. A rather complex behavior dominated by jamming (clogging) and unjamming phenomena in time is observed. With the help of several characterization techniques (laser grain sizing, dynamic light scattering, optical microscopy, and rheometry), we find that the particular methyl(hydroxyethyl) cellulose prepared with a specific protocol, tends to form aggregates in water, even at the lowest achievable concentration. These aggregates are highly polydisperse, ranging from 100 nm to 100 μm in size, and are deformable. Their origin appears to be the hydrophobic links among molecules and the related local crystallization. It is suggested that these features play a key role in the observed jamming/unjamming during filtration tests. © 2015 American Institute of Chemical Engineers AIChE J , 61: 3923–3935, 2015