Effect of Surface Freezing on Stability of Oil-in-Water Emulsions

Yuhei Tokiwa, Hiromu Sakamoto, Takanori Takiue, Makoto Aratono, Hiroki Matsubara, Colin D. Bain

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Penetration of alkane molecules into the adsorbed film of a cationic surfactant gives rise to a surface freezing transition at the alkane-water interface upon cooling. In this paper, we show that surface freezing of hexadecyltrimethylammonium chloride (CTAC) at the tetradecane-water interface stabilizes oil-in-water (OW) emulsions. For concentrations of CTAC near the critical micelle concentration, an OW emulsion coalesced readily above the surface freezing transition whereas the OW emulsion was stable in the surface frozen state. There was a discontinuous change in the stability of the OW emulsion at a temperature very close to the surface phase transition temperature as determined by interfacial tensiometry and ellipsometry on a planar oil-water interface. The mechanical elasticity of the surface frozen layer opposes film drainage and density fluctuations that could lead to rupture and is the most likely cause of the enhanced emulsion stability.

Original languageEnglish
Pages (from-to)6205-6209
Number of pages5
JournalLangmuir
Volume34
Issue number21
DOIs
Publication statusPublished - May 29 2018

Fingerprint

Emulsions
Freezing
freezing
emulsions
Oils
oils
Water
water
Alkanes
Paraffins
alkanes
Critical micelle concentration
Cationic surfactants
Ellipsometry
drainage
Superconducting transition temperature
Drainage
ellipsometry
Chlorides
Elasticity

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

Cite this

Effect of Surface Freezing on Stability of Oil-in-Water Emulsions. / Tokiwa, Yuhei; Sakamoto, Hiromu; Takiue, Takanori; Aratono, Makoto; Matsubara, Hiroki; Bain, Colin D.

In: Langmuir, Vol. 34, No. 21, 29.05.2018, p. 6205-6209.

Research output: Contribution to journalArticle

Tokiwa, Yuhei ; Sakamoto, Hiromu ; Takiue, Takanori ; Aratono, Makoto ; Matsubara, Hiroki ; Bain, Colin D. / Effect of Surface Freezing on Stability of Oil-in-Water Emulsions. In: Langmuir. 2018 ; Vol. 34, No. 21. pp. 6205-6209.
@article{5f9dc78337bd46b2bdd3eb26188c05a6,
title = "Effect of Surface Freezing on Stability of Oil-in-Water Emulsions",
abstract = "Penetration of alkane molecules into the adsorbed film of a cationic surfactant gives rise to a surface freezing transition at the alkane-water interface upon cooling. In this paper, we show that surface freezing of hexadecyltrimethylammonium chloride (CTAC) at the tetradecane-water interface stabilizes oil-in-water (OW) emulsions. For concentrations of CTAC near the critical micelle concentration, an OW emulsion coalesced readily above the surface freezing transition whereas the OW emulsion was stable in the surface frozen state. There was a discontinuous change in the stability of the OW emulsion at a temperature very close to the surface phase transition temperature as determined by interfacial tensiometry and ellipsometry on a planar oil-water interface. The mechanical elasticity of the surface frozen layer opposes film drainage and density fluctuations that could lead to rupture and is the most likely cause of the enhanced emulsion stability.",
author = "Yuhei Tokiwa and Hiromu Sakamoto and Takanori Takiue and Makoto Aratono and Hiroki Matsubara and Bain, {Colin D.}",
year = "2018",
month = "5",
day = "29",
doi = "10.1021/acs.langmuir.8b01088",
language = "English",
volume = "34",
pages = "6205--6209",
journal = "Langmuir",
issn = "0743-7463",
publisher = "American Chemical Society",
number = "21",

}

TY - JOUR

T1 - Effect of Surface Freezing on Stability of Oil-in-Water Emulsions

AU - Tokiwa, Yuhei

AU - Sakamoto, Hiromu

AU - Takiue, Takanori

AU - Aratono, Makoto

AU - Matsubara, Hiroki

AU - Bain, Colin D.

PY - 2018/5/29

Y1 - 2018/5/29

N2 - Penetration of alkane molecules into the adsorbed film of a cationic surfactant gives rise to a surface freezing transition at the alkane-water interface upon cooling. In this paper, we show that surface freezing of hexadecyltrimethylammonium chloride (CTAC) at the tetradecane-water interface stabilizes oil-in-water (OW) emulsions. For concentrations of CTAC near the critical micelle concentration, an OW emulsion coalesced readily above the surface freezing transition whereas the OW emulsion was stable in the surface frozen state. There was a discontinuous change in the stability of the OW emulsion at a temperature very close to the surface phase transition temperature as determined by interfacial tensiometry and ellipsometry on a planar oil-water interface. The mechanical elasticity of the surface frozen layer opposes film drainage and density fluctuations that could lead to rupture and is the most likely cause of the enhanced emulsion stability.

AB - Penetration of alkane molecules into the adsorbed film of a cationic surfactant gives rise to a surface freezing transition at the alkane-water interface upon cooling. In this paper, we show that surface freezing of hexadecyltrimethylammonium chloride (CTAC) at the tetradecane-water interface stabilizes oil-in-water (OW) emulsions. For concentrations of CTAC near the critical micelle concentration, an OW emulsion coalesced readily above the surface freezing transition whereas the OW emulsion was stable in the surface frozen state. There was a discontinuous change in the stability of the OW emulsion at a temperature very close to the surface phase transition temperature as determined by interfacial tensiometry and ellipsometry on a planar oil-water interface. The mechanical elasticity of the surface frozen layer opposes film drainage and density fluctuations that could lead to rupture and is the most likely cause of the enhanced emulsion stability.

UR - http://www.scopus.com/inward/record.url?scp=85046949507&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85046949507&partnerID=8YFLogxK

U2 - 10.1021/acs.langmuir.8b01088

DO - 10.1021/acs.langmuir.8b01088

M3 - Article

AN - SCOPUS:85046949507

VL - 34

SP - 6205

EP - 6209

JO - Langmuir

JF - Langmuir

SN - 0743-7463

IS - 21

ER -