Superspreading of aqueous films containing trisiloxane surfactant on mineral oil

T. Stoebe, Zuxuan Lin, Randal M. Hill, Michael Ward, H. Ted Davis

Research output: Contribution to journalArticle

Abstract

The spreading of water droplets, containing various surfactants, on liquid mineral oil surfaces has been investigated. Only "superspreading" trisiloxane surfactants were observed to promote rapid spreading on mineral oil, and the spreading characteristics of these systems differ substantially from those observed on solid substrates of comparable hydrophobicity. These differences include significantly faster spreading rates and monotonically increasing spreading rates with increasing surfactant concentration. Superspreading is attributed to Marangoni flow along the mineral oil-water interface. The extremely fast spreading on the mineral oil surface, as compared to hydrophobic solid surfaces, is attributed to the absence of the no-slip condition at the mineral oil-water interface. Real-time videomicroscopy of the spreading of aqueous droplets containing the trisiloxane surfactant M(D'E4OH)M revealed stepwise motion of the leading edges of the aqeuous drop driven by disintegration of large surfactant aggregates at the mineral oil-water interface. This observation suggests that disintegrating aggregates instantaneously deliver large amounts of surfactant to the mineral oil-water interface, creating large surface tension gradients that are required for Marangoni flow. These results imply an important role of aggregate disintegration during the spreading of surfactant dispersions on hydrophobic solid substrates.

Original languageEnglish (US)
Pages (from-to)7282-7286
Number of pages5
JournalLangmuir
Volume13
Issue number26
StatePublished - Dec 24 1997

Fingerprint

mineral oils
Mineral Oil
Mineral oils
Surface-Active Agents
Surface active agents
surfactants
Water
Disintegration
water
disintegration
Substrates
Hydrophobicity
Dispersions
hydrophobicity
leading edges
Surface tension
solid surfaces
interfacial tension
slip
gradients

ASJC Scopus subject areas

  • Colloid and Surface Chemistry
  • Physical and Theoretical Chemistry

Cite this

Stoebe, T., Lin, Z., Hill, R. M., Ward, M., & Davis, H. T. (1997). Superspreading of aqueous films containing trisiloxane surfactant on mineral oil. Langmuir, 13(26), 7282-7286.

Superspreading of aqueous films containing trisiloxane surfactant on mineral oil. / Stoebe, T.; Lin, Zuxuan; Hill, Randal M.; Ward, Michael; Davis, H. Ted.

In: Langmuir, Vol. 13, No. 26, 24.12.1997, p. 7282-7286.

Research output: Contribution to journalArticle

Stoebe, T, Lin, Z, Hill, RM, Ward, M & Davis, HT 1997, 'Superspreading of aqueous films containing trisiloxane surfactant on mineral oil', Langmuir, vol. 13, no. 26, pp. 7282-7286.
Stoebe T, Lin Z, Hill RM, Ward M, Davis HT. Superspreading of aqueous films containing trisiloxane surfactant on mineral oil. Langmuir. 1997 Dec 24;13(26):7282-7286.
Stoebe, T. ; Lin, Zuxuan ; Hill, Randal M. ; Ward, Michael ; Davis, H. Ted. / Superspreading of aqueous films containing trisiloxane surfactant on mineral oil. In: Langmuir. 1997 ; Vol. 13, No. 26. pp. 7282-7286.
@article{91444cbe2ba74c68ad7b4cab868e9364,
title = "Superspreading of aqueous films containing trisiloxane surfactant on mineral oil",
abstract = "The spreading of water droplets, containing various surfactants, on liquid mineral oil surfaces has been investigated. Only {"}superspreading{"} trisiloxane surfactants were observed to promote rapid spreading on mineral oil, and the spreading characteristics of these systems differ substantially from those observed on solid substrates of comparable hydrophobicity. These differences include significantly faster spreading rates and monotonically increasing spreading rates with increasing surfactant concentration. Superspreading is attributed to Marangoni flow along the mineral oil-water interface. The extremely fast spreading on the mineral oil surface, as compared to hydrophobic solid surfaces, is attributed to the absence of the no-slip condition at the mineral oil-water interface. Real-time videomicroscopy of the spreading of aqueous droplets containing the trisiloxane surfactant M(D'E4OH)M revealed stepwise motion of the leading edges of the aqeuous drop driven by disintegration of large surfactant aggregates at the mineral oil-water interface. This observation suggests that disintegrating aggregates instantaneously deliver large amounts of surfactant to the mineral oil-water interface, creating large surface tension gradients that are required for Marangoni flow. These results imply an important role of aggregate disintegration during the spreading of surfactant dispersions on hydrophobic solid substrates.",
author = "T. Stoebe and Zuxuan Lin and Hill, {Randal M.} and Michael Ward and Davis, {H. Ted}",
year = "1997",
month = "12",
day = "24",
language = "English (US)",
volume = "13",
pages = "7282--7286",
journal = "Langmuir",
issn = "0743-7463",
publisher = "American Chemical Society",
number = "26",

}

TY - JOUR

T1 - Superspreading of aqueous films containing trisiloxane surfactant on mineral oil

AU - Stoebe, T.

AU - Lin, Zuxuan

AU - Hill, Randal M.

AU - Ward, Michael

AU - Davis, H. Ted

PY - 1997/12/24

Y1 - 1997/12/24

N2 - The spreading of water droplets, containing various surfactants, on liquid mineral oil surfaces has been investigated. Only "superspreading" trisiloxane surfactants were observed to promote rapid spreading on mineral oil, and the spreading characteristics of these systems differ substantially from those observed on solid substrates of comparable hydrophobicity. These differences include significantly faster spreading rates and monotonically increasing spreading rates with increasing surfactant concentration. Superspreading is attributed to Marangoni flow along the mineral oil-water interface. The extremely fast spreading on the mineral oil surface, as compared to hydrophobic solid surfaces, is attributed to the absence of the no-slip condition at the mineral oil-water interface. Real-time videomicroscopy of the spreading of aqueous droplets containing the trisiloxane surfactant M(D'E4OH)M revealed stepwise motion of the leading edges of the aqeuous drop driven by disintegration of large surfactant aggregates at the mineral oil-water interface. This observation suggests that disintegrating aggregates instantaneously deliver large amounts of surfactant to the mineral oil-water interface, creating large surface tension gradients that are required for Marangoni flow. These results imply an important role of aggregate disintegration during the spreading of surfactant dispersions on hydrophobic solid substrates.

AB - The spreading of water droplets, containing various surfactants, on liquid mineral oil surfaces has been investigated. Only "superspreading" trisiloxane surfactants were observed to promote rapid spreading on mineral oil, and the spreading characteristics of these systems differ substantially from those observed on solid substrates of comparable hydrophobicity. These differences include significantly faster spreading rates and monotonically increasing spreading rates with increasing surfactant concentration. Superspreading is attributed to Marangoni flow along the mineral oil-water interface. The extremely fast spreading on the mineral oil surface, as compared to hydrophobic solid surfaces, is attributed to the absence of the no-slip condition at the mineral oil-water interface. Real-time videomicroscopy of the spreading of aqueous droplets containing the trisiloxane surfactant M(D'E4OH)M revealed stepwise motion of the leading edges of the aqeuous drop driven by disintegration of large surfactant aggregates at the mineral oil-water interface. This observation suggests that disintegrating aggregates instantaneously deliver large amounts of surfactant to the mineral oil-water interface, creating large surface tension gradients that are required for Marangoni flow. These results imply an important role of aggregate disintegration during the spreading of surfactant dispersions on hydrophobic solid substrates.

UR - http://www.scopus.com/inward/record.url?scp=0031380970&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0031380970&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0031380970

VL - 13

SP - 7282

EP - 7286

JO - Langmuir

JF - Langmuir

SN - 0743-7463

IS - 26

ER -