Surfactant-Water Systems with Small Layer Rigidity Phase Stability,Defects Models and Defects Mobility in Polyoxyethylene Surfactant with Water |
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| Authors: | Maurice Kleman |
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| Affiliation: | 1. Laboratoire de Physique des Solides (associé au CNRS), Université de Paris-Sud , B[acaron]timent 510, 91405, Orsay, France;2. Institut Curie, Section de Physique et Chimie , 11 Rue Pierre et Marie Curie 75005, Paris, France;3. Institute for Theoretical Physics, University of California , Santa Barbara, California, 93106, U.S.A. |
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| Abstract: | Abstract Starting from recent experiments in non-ionic surfactants, we discuss various topics characteristic of low rigidity K 1 materials. (1) The stability of the lamellar and cubic phases is studied in a simple model involving K 2 the saddle-splay constant K 2, and entropy terms due to the chains. We expect the lamellar phase to have a large range of existence, and the cubic phase to be of small extent. (2) We compare to cubic phases stability in large K 1 materials. We discuss the mobility of edge dislocations on the basis of a new model of the core which involves stretching of the core layers in one dimension, and easy nucleation of pores in this region. The core extension is a characteristic length of low K 1 materials which is much larger than de Gennes' length for microemulsions with a similar low K 1. |
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| Keywords: | 10.1080/0267829021000029453 |
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