Rheological properties of Carbopol containing nanoparticles

Gookhyun Baek, Chongyoup Kim

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

In this study we explored the rheological characteristics of Carbopol C934 gel (polyacrylic acid) containing SUS304 spherical nanoparticles of 100 nm as a simulant of gel propellants containing metal fuels. In comparison with the pure Carbopol gel, the SUS nanoparticle filled Carbopol gel exhibited stronger shear thinning and higher yield stress. As the concentration of nanoparticles increased yield stress increased, but viscosity and storage modulus increased first and then decreased abruptly beyond the critical limit. Also as the concentration of nanoparticles increased there was a transition in material characteristics from the ductile type to the brittle type, which means that highly filled Carbopol gels lost the structure almost instantaneously as the imposed stress was larger than the yield stress, while Carbopol gels of low particle loading sustained the structure even after the imposed stress was larger than the yield stress. The cryogenic scanning electron microscopy analysis revealed that the network structure changed abruptly when the rheological properties changed abruptly. The change in gel structure is attributed to the nanoparticles that compete with Carbopol chains in forming networks. The abrupt change in gel structure with the addition of particles beyond the critical limit should be an exclusive phenomenon of nanoparticles.

Original languageEnglish
Pages (from-to)313-330
Number of pages18
JournalJournal of Rheology
Volume55
Issue number2
DOIs
Publication statusPublished - 2011 Mar 1
Externally publishedYes

Fingerprint

Gels
gels
Nanoparticles
nanoparticles
Yield stress
carbopol 940
Particles (particulate matter)
metal fuels
Metal fuels
shear thinning
Shear thinning
carboxypolymethylene
propellants
Propellants
Cryogenics
cryogenics
Elastic moduli
Viscosity
viscosity
Scanning electron microscopy

Keywords

  • Cryo-FESEM
  • Network structure
  • Propellant
  • SUS nanoparticle

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Materials Science(all)

Cite this

Rheological properties of Carbopol containing nanoparticles. / Baek, Gookhyun; Kim, Chongyoup.

In: Journal of Rheology, Vol. 55, No. 2, 01.03.2011, p. 313-330.

Research output: Contribution to journalArticle

@article{4640844b38a9485b934b27eb12ca92b9,
title = "Rheological properties of Carbopol containing nanoparticles",
abstract = "In this study we explored the rheological characteristics of Carbopol C934 gel (polyacrylic acid) containing SUS304 spherical nanoparticles of 100 nm as a simulant of gel propellants containing metal fuels. In comparison with the pure Carbopol gel, the SUS nanoparticle filled Carbopol gel exhibited stronger shear thinning and higher yield stress. As the concentration of nanoparticles increased yield stress increased, but viscosity and storage modulus increased first and then decreased abruptly beyond the critical limit. Also as the concentration of nanoparticles increased there was a transition in material characteristics from the ductile type to the brittle type, which means that highly filled Carbopol gels lost the structure almost instantaneously as the imposed stress was larger than the yield stress, while Carbopol gels of low particle loading sustained the structure even after the imposed stress was larger than the yield stress. The cryogenic scanning electron microscopy analysis revealed that the network structure changed abruptly when the rheological properties changed abruptly. The change in gel structure is attributed to the nanoparticles that compete with Carbopol chains in forming networks. The abrupt change in gel structure with the addition of particles beyond the critical limit should be an exclusive phenomenon of nanoparticles.",
keywords = "Cryo-FESEM, Network structure, Propellant, SUS nanoparticle",
author = "Gookhyun Baek and Chongyoup Kim",
year = "2011",
month = "3",
day = "1",
doi = "10.1122/1.3538092",
language = "English",
volume = "55",
pages = "313--330",
journal = "Journal of Rheology",
issn = "0148-6055",
publisher = "Society of Rheology",
number = "2",

}

TY - JOUR

T1 - Rheological properties of Carbopol containing nanoparticles

AU - Baek, Gookhyun

AU - Kim, Chongyoup

PY - 2011/3/1

Y1 - 2011/3/1

N2 - In this study we explored the rheological characteristics of Carbopol C934 gel (polyacrylic acid) containing SUS304 spherical nanoparticles of 100 nm as a simulant of gel propellants containing metal fuels. In comparison with the pure Carbopol gel, the SUS nanoparticle filled Carbopol gel exhibited stronger shear thinning and higher yield stress. As the concentration of nanoparticles increased yield stress increased, but viscosity and storage modulus increased first and then decreased abruptly beyond the critical limit. Also as the concentration of nanoparticles increased there was a transition in material characteristics from the ductile type to the brittle type, which means that highly filled Carbopol gels lost the structure almost instantaneously as the imposed stress was larger than the yield stress, while Carbopol gels of low particle loading sustained the structure even after the imposed stress was larger than the yield stress. The cryogenic scanning electron microscopy analysis revealed that the network structure changed abruptly when the rheological properties changed abruptly. The change in gel structure is attributed to the nanoparticles that compete with Carbopol chains in forming networks. The abrupt change in gel structure with the addition of particles beyond the critical limit should be an exclusive phenomenon of nanoparticles.

AB - In this study we explored the rheological characteristics of Carbopol C934 gel (polyacrylic acid) containing SUS304 spherical nanoparticles of 100 nm as a simulant of gel propellants containing metal fuels. In comparison with the pure Carbopol gel, the SUS nanoparticle filled Carbopol gel exhibited stronger shear thinning and higher yield stress. As the concentration of nanoparticles increased yield stress increased, but viscosity and storage modulus increased first and then decreased abruptly beyond the critical limit. Also as the concentration of nanoparticles increased there was a transition in material characteristics from the ductile type to the brittle type, which means that highly filled Carbopol gels lost the structure almost instantaneously as the imposed stress was larger than the yield stress, while Carbopol gels of low particle loading sustained the structure even after the imposed stress was larger than the yield stress. The cryogenic scanning electron microscopy analysis revealed that the network structure changed abruptly when the rheological properties changed abruptly. The change in gel structure is attributed to the nanoparticles that compete with Carbopol chains in forming networks. The abrupt change in gel structure with the addition of particles beyond the critical limit should be an exclusive phenomenon of nanoparticles.

KW - Cryo-FESEM

KW - Network structure

KW - Propellant

KW - SUS nanoparticle

UR - http://www.scopus.com/inward/record.url?scp=80053236634&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=80053236634&partnerID=8YFLogxK

U2 - 10.1122/1.3538092

DO - 10.1122/1.3538092

M3 - Article

VL - 55

SP - 313

EP - 330

JO - Journal of Rheology

JF - Journal of Rheology

SN - 0148-6055

IS - 2

ER -