Anomalous change in lamellar spacing by shear flow in nonionic surfactant/water system

T. Kato, K. Minewaki, K. Miyazaki, Y. Kawabata, M. Imai

研究成果: Conference contribution

抄録

Small-angle neutron scattering (SANS) is measured on a lamellar phase in C16E7 (hepta(oxyethylene glycol)-n-hexadecylether) /water system (40 - 55 wt% of C16E7) at 70 °C under shear flow. As the shear rate increases from 0.3 to 1 s-1, the repeat distance (d) is reduced suddenly and discontinuously. With the further increase in the shear rate, d increases slightly after taking a minimum (d∗). These results are obtained for all the principal orientations of lamellae. While d at rest increases from 6.5 nm to 8.5 nm with decreasing concentration from 55 to 40 wt%, d∗ is almost independent of concentration and nearly equal to the thickness of bilayers (∼ 5 nm) obtained from the line shape analysis of small angle X-ray scattering at rest. These results suggest segregation into surfactant-rich and water-rich regions.

本文言語English
ホスト出版物のタイトルSlow Dynamics in Complex Systems
ホスト出版物のサブタイトル3rd International Symposium on Slow Dynamics in Complex Systems
編集者Michio Tokuyama, Irwin Oppenheim
出版社American Institute of Physics Inc.
ページ94-95
ページ数2
ISBN(電子版)0735401837
DOI
出版ステータスPublished - 2004 4 30
外部発表はい
イベント3rd International Symposium on Slow Dynamics in Complex Systems - Sendai, Japan
継続期間: 2003 11 32003 11 8

出版物シリーズ

名前AIP Conference Proceedings
708
ISSN(印刷版)0094-243X
ISSN(電子版)1551-7616

Other

Other3rd International Symposium on Slow Dynamics in Complex Systems
国/地域Japan
CitySendai
Period03/11/303/11/8

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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