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Discontinuous Growth of Onion Structure under Shear

  • Shuji FujiiEmail author
Part of the Progress in Colloid and Polymer Science book series (PROGCOLLOID, volume 136)

Abstract

Discontinuous growth process of the Multilamellar vesicle (so called Onion) driven by shear quench was investigated by viscometry and microscopy in detail. Discontinuous Onion growth was observed when the final shear rate corresponded to the intermediate shear rate domain where the shear-thickening and shear-thinning viscosity appeared. In this process, large Onion transformed back into the lamellae and then formed large Onion. Small Onion to lamellae degradation process might be achieved by two modes, first the disruption of the configurational order of densely packed Onions followed by the rupture of Onion as second process. The second process would be characterized by the shear-banding flow pattern composed of the Onion-Lα coexisting state. We suggest that the appearance of the shear-band structure and the Onion reformation developed from the shear-band might be scaled by considering the mechanical energy balance with the bending elastic energy of bilayers.

Keywords

Surfactant Lamellar Phase Onion Phase Growth Mechanism Vesicle 

Notes

Acknowledgement

This research was supported by the Ministry of Education, Science, Sports and Culture, Grant-in-Aid for Young Scientists (B) No.19740258 and Scientific Research on Priority Area “Soft Matter Physics” No.19031008. S.F. thanks to Prof. T. Takahashi at Nagaoka University of Technology, Japan, for use the rheometer ARES-LS and the Linkam shear cell CSS450.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2009

Authors and Affiliations

  1. 1.Nagaoka University of TechnologyNagaokaJapan

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