TY - JOUR
T1 - Surface Freezing of Cetyltrimethylammonium Chloride-Hexadecanol Mixed Adsorbed Film at Dodecane-Water Interface
AU - Sakamoto, Hiromu
AU - Masunaga, Akihiro
AU - Takiue, Takanori
AU - Tanida, Hajime
AU - Uruga, Tomoya
AU - Nitta, Kiyofumi
AU - Prause, Albert
AU - Gradzielski, Michael
AU - Matsubara, Hiroki
N1 - Publisher Copyright:
© 2020 American Chemical Society.
PY - 2020/12/8
Y1 - 2020/12/8
N2 - The surface freezing transition of a mixed adsorbed film containing cetyltrimethylammonium chloride (CTAC) and n-hexadecanol (C16OH) was utilized at the dodecane-water interface to control the stability of oil-in-water (O/W) emulsions. The corresponding surface frozen and surface liquid mixed adsorbed films were characterized using interfacial tensiometry and X-ray reflectometry. The emulsion samples prepared in the temperature range of the surface frozen and surface liquid phases showed a clear difference in their stability: the emulsion volume decreased continuously right after the emulsification in the surface liquid region, while it remained constant or decreased at a much slower rate in the surface frozen region. Compared to the previously examined CTAC-tetradecane mixed adsorbed film, the surface freezing temperature increased from 9.5 to 25.0 °C due to the better chain matching between CTAC and C16OH and higher surface activity of C16OH. This then renders such systems much more attractive for practical applications.
AB - The surface freezing transition of a mixed adsorbed film containing cetyltrimethylammonium chloride (CTAC) and n-hexadecanol (C16OH) was utilized at the dodecane-water interface to control the stability of oil-in-water (O/W) emulsions. The corresponding surface frozen and surface liquid mixed adsorbed films were characterized using interfacial tensiometry and X-ray reflectometry. The emulsion samples prepared in the temperature range of the surface frozen and surface liquid phases showed a clear difference in their stability: the emulsion volume decreased continuously right after the emulsification in the surface liquid region, while it remained constant or decreased at a much slower rate in the surface frozen region. Compared to the previously examined CTAC-tetradecane mixed adsorbed film, the surface freezing temperature increased from 9.5 to 25.0 °C due to the better chain matching between CTAC and C16OH and higher surface activity of C16OH. This then renders such systems much more attractive for practical applications.
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U2 - 10.1021/acs.langmuir.0c02807
DO - 10.1021/acs.langmuir.0c02807
M3 - Article
C2 - 33222439
AN - SCOPUS:85097581704
SN - 0743-7463
VL - 36
SP - 14811
EP - 14818
JO - Langmuir
JF - Langmuir
IS - 48
ER -