Modeling the Mechanism of Coagulum Formation in Dispersions

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F14%3A43897973" target="_blank" >RIV/60461373:22340/14:43897973 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1021/la500101x" target="_blank" >http://dx.doi.org/10.1021/la500101x</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/la500101x" target="_blank" >10.1021/la500101x</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Modeling the Mechanism of Coagulum Formation in Dispersions

Popis výsledku v původním jazyce

The stability of colloidal dispersions is of crucial importance because the properties of dispersions are strongly affected by the degree of coagulation. Whereas the coagulation kinetics for quiescent (i.e., nonstirred) and diluted systems is well-established, the behavior of concentrated dispersions subjected to shear is still not fully understood. We employ the discrete element method (DEM) for the simulation of coagulation of concentrated colloidal dispersions. Normal forces between interacting particles are described by a combination of the Derjaguin, Landau, Verwey, and Overbeek (DLVO) and Johnson, Kendall, and Roberts (JKR) theories. We show that, in accordance with the expectations, the coagulation behavior depends strongly on the particle volume fraction, the surface potential, and the shear rate. Moreover, we demonstrate that the doublet formation rate is insufficient for the description of the coagulation kinetics and that the detailed DEM model is able to explain the autocat

Název v anglickém jazyce

Modeling the Mechanism of Coagulum Formation in Dispersions

Popis výsledku anglicky

The stability of colloidal dispersions is of crucial importance because the properties of dispersions are strongly affected by the degree of coagulation. Whereas the coagulation kinetics for quiescent (i.e., nonstirred) and diluted systems is well-established, the behavior of concentrated dispersions subjected to shear is still not fully understood. We employ the discrete element method (DEM) for the simulation of coagulation of concentrated colloidal dispersions. Normal forces between interacting particles are described by a combination of the Derjaguin, Landau, Verwey, and Overbeek (DLVO) and Johnson, Kendall, and Roberts (JKR) theories. We show that, in accordance with the expectations, the coagulation behavior depends strongly on the particle volume fraction, the surface potential, and the shear rate. Moreover, we demonstrate that the doublet formation rate is insufficient for the description of the coagulation kinetics and that the detailed DEM model is able to explain the autocat

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CI - Průmyslová chemie a chemické inženýrství

OECD FORD obor

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Projekt

<a href="/cs/project/GAP106%2F11%2F1069" target="_blank" >GAP106/11/1069: Rozpad a koalescence kapek v tekoucích směsích nemísitelných polymerů</a><br>

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2014

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Langmuir

ISSN

0743-7463

e-ISSN

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Svazek periodika

30

Číslo periodika v rámci svazku

NEUVEDEN

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

2693-2702

Kód UT WoS článku

000333235500013

EID výsledku v databázi Scopus

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