Freezing and melting behavior of an octyl β-D-glucoside–water binary system – inhibitory effect of octyl β-D-glucoside on ice crystal formation

Shigesaburo Ogawa; Kouichi Asakura; Shuichi Osanai

doi:10.1039/C2CP41439B

Freezing and melting behavior of an octyl β-d-glucoside–water binary system – inhibitory effect of octyl β-d-glucoside on ice crystal formation

Shigesaburo Ogawa,*^a Kouichi Asakura^b and Shuichi Osanai^b

* Corresponding authors

^a Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka, Japan
E-mail: s-ogawa@mail.cstm.kyushu-u.ac.jp
Fax: +81-92-802-2838
Tel: +81-92-802-2832

^b Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Japan
E-mail: asakura@applc.keio.ac.jp
Fax: +81-45-566-1560
Tel: +81-45-566-1553

Abstract

Phase transition behavior of lyotropic liquid crystals of an octyl β-D-glucoside (OG)–water binary system during ice freezing and melting was studied by differential scanning calorimetry (DSC) and polarizing optical microscopy (POM). Not the thermotropic, but the lyotropic phase transition due to the change of OG concentration during ice freezing and melting was observed. The concentration–temperature phase diagram of the binary system was constructed. Melting temperature of ice, T_m, lyotropic phase transition temperature, T_tr, and glass transition temperatures of unfrozen phases in the absence and presence of ice, T_g and Image ID:c2cp41439b-t1.gif , were shown in the phase diagram. The phase diagram indicated that the OG aqueous system was concentrated to ca. 90–92 wt% by ice freezing and exhibited glass transition at Image ID:c2cp41439b-t2.gif . An observation of the concentration-gradient specimen by the cryo-POM showed the evidence of the inhibitory effects of OG on nucleation and growth of ice crystals in the extremely high OG concentration system in which the lamellar liquid crystalline phase was formed. This study provided the importance of the influence of concentration change by ice freezing on the behaviour of the sugar-based surfactant–water system under low temperature conditions.

Article information

https://doi.org/10.1039/C2CP41439B

Article type

Paper

Submitted

04 May 2012

Accepted

01 Oct 2012

First published

08 Oct 2012

Download Citation

Phys. Chem. Chem. Phys., 2012,14, 16312-16320

Permissions

Request permissions

Freezing and melting behavior of an octyl β-D-glucoside–water binary system – inhibitory effect of octyl β-D-glucoside on ice crystal formation

S. Ogawa, K. Asakura and S. Osanai, Phys. Chem. Chem. Phys., 2012, 14, 16312 DOI: 10.1039/C2CP41439B

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Physical Chemistry Chemical Physics

Freezing and melting behavior of an octyl β-d-glucoside–water binary system – inhibitory effect of octyl β-d-glucoside on ice crystal formation

Abstract

Article information

Download Citation

Permissions

Freezing and melting behavior of an octyl β-D-glucoside–water binary system – inhibitory effect of octyl β-D-glucoside on ice crystal formation

Social activity

Search articles by author

Spotlight

Advertisements