Effect of surfactant excess in non-polar ferrofluids probed by small-angle neutron scattering

V. I. Petrenko, M. V. Avdeev, V. Aksenov, L. A. Bulavin, LRosta

Research output: Conference contribution

10 Citations (Scopus)

Abstract

The microstructure of ferrofluids (magnetite/oleic acid/benzene) with an excess of free oleic acid is investigated by small-angle neutron scattering (SANS). For such excess higher than 25 vol. % a sharp break in the stability of ferrofluids occurs followed by coagulation and precipitation. Below this value the influence of the surfactant excess on the stability of ferrofluids is insignificant; neither particle aggregation nor surfactant agglomeration is observed. The interaction of free acid molecules in the ferrofluids is compared with that in pure benzene solutions. A significant increase in the attraction is observed for acid molecules in the ferrofluids, which is related to the loss of magnetic fluids stability at high excess of acid.

Original languageEnglish
Title of host publicationSolid State Phenomena
PublisherTrans Tech Publications Ltd
Pages198-201
Number of pages4
Volume152-153
ISBN (Print)390845168X, 9783908451686
DOIs
Publication statusPublished - 2009
EventForth Moscow International Symposium on Magnetism MISM2008 - Moscow, Russian Federation
Duration: jún. 20 2008jún. 25 2008

Publication series

NameSolid State Phenomena
Volume152-153
ISSN (Print)10120394

Other

OtherForth Moscow International Symposium on Magnetism MISM2008
CountryRussian Federation
CityMoscow
Period6/20/086/25/08

Fingerprint

Magnetic fluids
ferrofluids
Neutron scattering
Surface-Active Agents
neutron scattering
Surface active agents
surfactants
oleic acid
Oleic acid
acids
Oleic Acid
Benzene
Acids
benzene
Agglomeration
Ferrosoferric Oxide
coagulation
agglomeration
Molecules
magnetite

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics

Cite this

Petrenko, V. I., Avdeev, M. V., Aksenov, V., Bulavin, L. A., & LRosta (2009). Effect of surfactant excess in non-polar ferrofluids probed by small-angle neutron scattering. In Solid State Phenomena (Vol. 152-153, pp. 198-201). (Solid State Phenomena; Vol. 152-153). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/SSP.152-153.198

Effect of surfactant excess in non-polar ferrofluids probed by small-angle neutron scattering. / Petrenko, V. I.; Avdeev, M. V.; Aksenov, V.; Bulavin, L. A.; LRosta.

Solid State Phenomena. Vol. 152-153 Trans Tech Publications Ltd, 2009. p. 198-201 (Solid State Phenomena; Vol. 152-153).

Research output: Conference contribution

Petrenko, VI, Avdeev, MV, Aksenov, V, Bulavin, LA & LRosta 2009, Effect of surfactant excess in non-polar ferrofluids probed by small-angle neutron scattering. in Solid State Phenomena. vol. 152-153, Solid State Phenomena, vol. 152-153, Trans Tech Publications Ltd, pp. 198-201, Forth Moscow International Symposium on Magnetism MISM2008, Moscow, Russian Federation, 6/20/08. https://doi.org/10.4028/www.scientific.net/SSP.152-153.198
Petrenko VI, Avdeev MV, Aksenov V, Bulavin LA, LRosta. Effect of surfactant excess in non-polar ferrofluids probed by small-angle neutron scattering. In Solid State Phenomena. Vol. 152-153. Trans Tech Publications Ltd. 2009. p. 198-201. (Solid State Phenomena). https://doi.org/10.4028/www.scientific.net/SSP.152-153.198
Petrenko, V. I. ; Avdeev, M. V. ; Aksenov, V. ; Bulavin, L. A. ; LRosta. / Effect of surfactant excess in non-polar ferrofluids probed by small-angle neutron scattering. Solid State Phenomena. Vol. 152-153 Trans Tech Publications Ltd, 2009. pp. 198-201 (Solid State Phenomena).
@inproceedings{4fd2c3a8a1ee438f99113e531620bd3c,
title = "Effect of surfactant excess in non-polar ferrofluids probed by small-angle neutron scattering",
abstract = "The microstructure of ferrofluids (magnetite/oleic acid/benzene) with an excess of free oleic acid is investigated by small-angle neutron scattering (SANS). For such excess higher than 25 vol. {\%} a sharp break in the stability of ferrofluids occurs followed by coagulation and precipitation. Below this value the influence of the surfactant excess on the stability of ferrofluids is insignificant; neither particle aggregation nor surfactant agglomeration is observed. The interaction of free acid molecules in the ferrofluids is compared with that in pure benzene solutions. A significant increase in the attraction is observed for acid molecules in the ferrofluids, which is related to the loss of magnetic fluids stability at high excess of acid.",
keywords = "Ferrofluids stability, Small-angle neutron scattering, Surfactant excess",
author = "Petrenko, {V. I.} and Avdeev, {M. V.} and V. Aksenov and Bulavin, {L. A.} and LRosta",
year = "2009",
doi = "10.4028/www.scientific.net/SSP.152-153.198",
language = "English",
isbn = "390845168X",
volume = "152-153",
series = "Solid State Phenomena",
publisher = "Trans Tech Publications Ltd",
pages = "198--201",
booktitle = "Solid State Phenomena",

}

TY - GEN

T1 - Effect of surfactant excess in non-polar ferrofluids probed by small-angle neutron scattering

AU - Petrenko, V. I.

AU - Avdeev, M. V.

AU - Aksenov, V.

AU - Bulavin, L. A.

AU - LRosta,

PY - 2009

Y1 - 2009

N2 - The microstructure of ferrofluids (magnetite/oleic acid/benzene) with an excess of free oleic acid is investigated by small-angle neutron scattering (SANS). For such excess higher than 25 vol. % a sharp break in the stability of ferrofluids occurs followed by coagulation and precipitation. Below this value the influence of the surfactant excess on the stability of ferrofluids is insignificant; neither particle aggregation nor surfactant agglomeration is observed. The interaction of free acid molecules in the ferrofluids is compared with that in pure benzene solutions. A significant increase in the attraction is observed for acid molecules in the ferrofluids, which is related to the loss of magnetic fluids stability at high excess of acid.

AB - The microstructure of ferrofluids (magnetite/oleic acid/benzene) with an excess of free oleic acid is investigated by small-angle neutron scattering (SANS). For such excess higher than 25 vol. % a sharp break in the stability of ferrofluids occurs followed by coagulation and precipitation. Below this value the influence of the surfactant excess on the stability of ferrofluids is insignificant; neither particle aggregation nor surfactant agglomeration is observed. The interaction of free acid molecules in the ferrofluids is compared with that in pure benzene solutions. A significant increase in the attraction is observed for acid molecules in the ferrofluids, which is related to the loss of magnetic fluids stability at high excess of acid.

KW - Ferrofluids stability

KW - Small-angle neutron scattering

KW - Surfactant excess

UR - http://www.scopus.com/inward/record.url?scp=76149096470&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=76149096470&partnerID=8YFLogxK

U2 - 10.4028/www.scientific.net/SSP.152-153.198

DO - 10.4028/www.scientific.net/SSP.152-153.198

M3 - Conference contribution

AN - SCOPUS:76149096470

SN - 390845168X

SN - 9783908451686

VL - 152-153

T3 - Solid State Phenomena

SP - 198

EP - 201

BT - Solid State Phenomena

PB - Trans Tech Publications Ltd

ER -