Abstract
We theoretically investigate the coexistences of lamellar phases both in binary and in ternary surfactant solutions. The previous free energy of a lamellar stack is extended to take into account the translational entropy of membrane segments. The obtained phase diagram for binary surfactant solutions (surfactant/water mixtures) shows a phase separation between two lamellar phases and also exhibits a critical point. For lamellar phases in ternary surfactant solutions (surfactant/surfactant/water mixtures), we explore the possible phase behaviors and show that the phase diagrams exhibit various three-phase regions as well as two-phase regions in which different lamellar phases coexist. We also find that finite surface tension suppresses the undulation fluctuations of membranes and leads to a wider three-phase and two-phase coexistence regions.
| Original language | English |
|---|---|
| Pages (from-to) | 272-281 |
| Number of pages | 10 |
| Journal | Soft Materials |
| Volume | 15 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - Oct 2 2017 |
| Externally published | Yes |
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Keywords
- Helfrich interaction
- Lamellar phase
- phase behaviors
- surfactant solutions
ASJC Scopus subject areas
- Chemistry(all)
- Materials Science(all)
- Condensed Matter Physics
Cite this
Coexistences of lamellar phases in ternary surfactant solutions. / Sou, Isamu; Okamoto, Ryuichi; Komura, Shigeyuki; Wolff, Jean.
In: Soft Materials, Vol. 15, No. 4, 02.10.2017, p. 272-281.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Coexistences of lamellar phases in ternary surfactant solutions
AU - Sou, Isamu
AU - Okamoto, Ryuichi
AU - Komura, Shigeyuki
AU - Wolff, Jean
PY - 2017/10/2
Y1 - 2017/10/2
N2 - We theoretically investigate the coexistences of lamellar phases both in binary and in ternary surfactant solutions. The previous free energy of a lamellar stack is extended to take into account the translational entropy of membrane segments. The obtained phase diagram for binary surfactant solutions (surfactant/water mixtures) shows a phase separation between two lamellar phases and also exhibits a critical point. For lamellar phases in ternary surfactant solutions (surfactant/surfactant/water mixtures), we explore the possible phase behaviors and show that the phase diagrams exhibit various three-phase regions as well as two-phase regions in which different lamellar phases coexist. We also find that finite surface tension suppresses the undulation fluctuations of membranes and leads to a wider three-phase and two-phase coexistence regions.
AB - We theoretically investigate the coexistences of lamellar phases both in binary and in ternary surfactant solutions. The previous free energy of a lamellar stack is extended to take into account the translational entropy of membrane segments. The obtained phase diagram for binary surfactant solutions (surfactant/water mixtures) shows a phase separation between two lamellar phases and also exhibits a critical point. For lamellar phases in ternary surfactant solutions (surfactant/surfactant/water mixtures), we explore the possible phase behaviors and show that the phase diagrams exhibit various three-phase regions as well as two-phase regions in which different lamellar phases coexist. We also find that finite surface tension suppresses the undulation fluctuations of membranes and leads to a wider three-phase and two-phase coexistence regions.
KW - Helfrich interaction
KW - Lamellar phase
KW - phase behaviors
KW - surfactant solutions
UR - http://www.scopus.com/inward/record.url?scp=85028837741&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85028837741&partnerID=8YFLogxK
U2 - 10.1080/1539445X.2017.1354024
DO - 10.1080/1539445X.2017.1354024
M3 - Article
VL - 15
SP - 272
EP - 281
JO - Soft Materials
JF - Soft Materials
SN - 1539-445X
IS - 4
ER -