Time-dependent viscous flow behavior of a hydrophobic fumed silica suspension

Jorge H. Sánchez; Francisco J. Rubio-Hernández; Nicolás M. Páez-Flor

doi:10.3390/pr9050807

Time-dependent viscous flow behavior of a hydrophobic fumed silica suspension

Jorge H. Sánchez
, Francisco J. Rubio-Hernández
, Nicolás M. Páez-Flor

Research output: Contribution to scientific journal › Article in an indexed scientific journal › peer-review

7 Scopus citations

Abstract

The viscous flow behavior of a 12.5 vol% hydrophobic fumed silica (Aerosil® R816) suspension in polypropylene glycol of low molecular weight (PPG400) was studied in a stress-controlled rheometer. The steady flow curve showed shear thickening between two shear thinning regions. Time-dependent viscosity response provoked by step changes in shear stresses corresponding to the shear-thickening region apparently agrees with thixotropic behavior just after the very initial stages are surpassed. Almost instantaneous jamming can justify misinterpretation of the results.

Original language	English
Article number	807
Journal	Processes
Volume	9
Issue number	5
DOIs	https://doi.org/10.3390/pr9050807
State	Published - May 2021

Bibliographical note

Publisher Copyright:
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Keywords

Hydrophobic fumed silica
Polypropylene glycol
Shear-thickening
Time-dependent shear viscosity

Types Minciencias

Artículos de investigación con calidad D

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10.3390/pr9050807

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title = "Time-dependent viscous flow behavior of a hydrophobic fumed silica suspension",

abstract = "The viscous flow behavior of a 12.5 vol\% hydrophobic fumed silica (Aerosil{\textregistered} R816) suspension in polypropylene glycol of low molecular weight (PPG400) was studied in a stress-controlled rheometer. The steady flow curve showed shear thickening between two shear thinning regions. Time-dependent viscosity response provoked by step changes in shear stresses corresponding to the shear-thickening region apparently agrees with thixotropic behavior just after the very initial stages are surpassed. Almost instantaneous jamming can justify misinterpretation of the results.",

keywords = "Hydrophobic fumed silica, Polypropylene glycol, Shear-thickening, Time-dependent shear viscosity",

author = "S{\'a}nchez, \{Jorge H.\} and Rubio-Hern{\'a}ndez, \{Francisco J.\} and P{\'a}ez-Flor, \{Nicol{\'a}s M.\}",

note = "Publisher Copyright: {\textcopyright} 2021 by the authors. Licensee MDPI, Basel, Switzerland.",

year = "2021",

month = may,

doi = "10.3390/pr9050807",

language = "Ingl{\'e}s",

volume = "9",

journal = "Processes",

issn = "2227-9717",

publisher = "Multidisciplinary Digital Publishing Institute (MDPI)",

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TY - JOUR

T1 - Time-dependent viscous flow behavior of a hydrophobic fumed silica suspension

AU - Sánchez, Jorge H.

AU - Rubio-Hernández, Francisco J.

AU - Páez-Flor, Nicolás M.

PY - 2021/5

Y1 - 2021/5

N2 - The viscous flow behavior of a 12.5 vol% hydrophobic fumed silica (Aerosil® R816) suspension in polypropylene glycol of low molecular weight (PPG400) was studied in a stress-controlled rheometer. The steady flow curve showed shear thickening between two shear thinning regions. Time-dependent viscosity response provoked by step changes in shear stresses corresponding to the shear-thickening region apparently agrees with thixotropic behavior just after the very initial stages are surpassed. Almost instantaneous jamming can justify misinterpretation of the results.

AB - The viscous flow behavior of a 12.5 vol% hydrophobic fumed silica (Aerosil® R816) suspension in polypropylene glycol of low molecular weight (PPG400) was studied in a stress-controlled rheometer. The steady flow curve showed shear thickening between two shear thinning regions. Time-dependent viscosity response provoked by step changes in shear stresses corresponding to the shear-thickening region apparently agrees with thixotropic behavior just after the very initial stages are surpassed. Almost instantaneous jamming can justify misinterpretation of the results.

KW - Hydrophobic fumed silica

KW - Polypropylene glycol

KW - Shear-thickening

KW - Time-dependent shear viscosity

UR - https://www.scopus.com/pages/publications/85106579450

U2 - 10.3390/pr9050807

DO - 10.3390/pr9050807

M3 - Artículo en revista científica indexada

AN - SCOPUS:85106579450

SN - 2227-9717

VL - 9

JO - Processes

JF - Processes

IS - 5

M1 - 807

ER -

Time-dependent viscous flow behavior of a hydrophobic fumed silica suspension

Abstract

Bibliographical note

Keywords

Types Minciencias

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