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Micellization, Solubilization, and Microemulsions Volume 2 Micellization, Solubilization, and Microemulsions Volume 2 Edited by K.L. Mittal IBM Corporation East Fishkill Facility Hopewell Junction, New York Plenum Press· New York and London Library of Congress Cataloging in Publication Data Symposium on Micellization, Solubilization, and Microemulsions, Albany, 1976. Micellization, solubilization, and microemulsions. Symposium held at the Seventh Northeast regional meeting of the American Chemical Society. Includes indexes. 1. Micelles-Congresses. 2. Solubilization-Congresses. 3. Emulsions-Congresses. I. Mittal, K. L., 1945- II. Title. III. Title: Microemulsions. 00549.8976 1976 541'.3451 77-1126 ISBN-13: 978-1-4613-4159-8 e-ISBN-13: 978-1-4613-4157-4 001: 10.1007/978-1-4613-4157-4 Proceedings of the second half of the International Symposium on Micellization, Solubilization, and Microemulsions held at the Seventh Northeast Regional Meeting of the American Chemical Society in Albany, New York, August 8-11, 1976 © 1977 Plenum Press, New York Softcover reprint of the hardcover 15t edition 1977 A Division of Plenum Publishing Corporation 227 West 17th Street, New York, N.Y. 10011 All rights reserved No part of this book may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, electronic, mechanical, photocopying, microfilming, recording, or otherwise, without written permission from the Publisher PREFACE This volume and its companion Volume 1 chronicle the proceed- ings of the International Symposium on Micellization, Solubiliza- tion, and tficroemulsions held under the auspices of the Northeast Regional Meeting of the American Chemical Society in Albany, New York, August 8-11, 1976. The technical program consisted of 48 papers by 91 authors from twelve countries. The program was divided into six sessions, and Dr. Hartley delivered the Concluding Remarks. Subsequently, six more papers were contributed for the proceedings volumes with the result that these volumes contain Sl papers (three papers are not included for certain reasons) and are divided into seven parts. The first three parts are embodied in Volume I and the remaining four parts constitute Volume 2; each part is followed by a Discussion Section. Dr. Hartley's Concluding Remarks are in- cluded in both volumes. When the idea of arranging a symposium on micelles was broached to me, I accepted it without an iota of hesitation. I had two op- tions: either to make it a one- or two-sessions symposium, or bring together the global community actively carrying out research in this area. I opted for the latter as the subject was very timely and I knew that it would elicit very enthusiastic response. In order to broaden the scope of the symposium, I suggested that the theme of the symposium should be Micellizationy Solubilization and Microemulsions. Two salient features of this symposium should be mentioned: (i) a truly international symposium of this magnitude rarely occurs at a Regional Meeting, and (ii) I do not know whether there was ever a symposium of this quality, magnitude, and breadth of coverage on this topic. Micelles are colloidal species in solution that are produced by aggregation of a relatively large number (from 20 up to thousands) of small amphiphilic molecules or ions. Micellar systems are v PREFACE usually described as association colloids. The fundamental char- acteristics of micelle-forming monomers is their amphiphilicity - the presence of both polar and nonpolar portions in the same molecule. The great variety of possible monomers produces micelles of widely differing surface composition and interior. The applica- tions of amphiphilic substances ranges from A to Z (anesthesiology to zoology) and their micelle formation has important ramifications. Micelle formation occurs by cooperative association of monomers over a narrow concentration range known as the critical micelliza- tion concentration (c.m.c.). Their special structural characteristics and their ability to solubilize otherwise insoluble substances render micelles both important and useful. Among other things, micelles act as good model systems and are excellent catalysts for a host of reactions. The many and varied applications of micelles and microemulsions are summarized in the opening chapter of these proceedings volumes. The earlier research activity in the area of micelles was primarily carried out by colloid chemists but a glance at the literature on this topic attests that presently researchers from many disciplines are actively pursuing research in this area. The energy crisis has given an impetus for increased work on applica- tion of microemulsions and micellar solutions for tertiary oil recovery. Also, permanent storage of energy through light-driven redox reactions is shown to be feasible using micellar surfactant systems. It should be added that the availability of sophisticated instrumentation has been a boon in micellar research. These proceedings volumes contain a comprehensive coverage of both theoretical and practical aspects of micellization, solubiliza- tion, and microemulsions. These volumes bring together the latest theoretical and experimental research activities being carried out by scientists from various disciplines, bring out clearly the inter- disciplinary and multidisciplinary aspects and importance of the subject symposium. The topics covered include: history, applica- tions, and prospects of micelles; thermodynamics and kinetics of micellization, application of fast reaction kinetics; theo- retical developments in understanding monomer-micelle equilibria and stepwise aggregation; stepwise aggregation and the concept of c.m.c.; micelles of ionic and nonionic surfactants in aqueous and nonaqueous media; micelles as model systems; micelles and oil recovery; mixed micelles; application of spectroscopic techniques to understand mechanisms of reactions and interactions in micellar media; micellar catalysis of a variety of reactions; solubiliza- tion of polar and nonpolar substances; formation and structure of microemulsions and reactions in microemulsion media. PREFACE vii These volumes - a product of the efforts of more than one hundred scientists representing many countries - attest to the brisk research activity taking place in the realm of micelles and micro- emulsions, and all signals indicate that this tempo will be con- tinued. As we probe more into this fascinating area of micelles and microemu1sions, more new vistas will emerge. Acknowledgments. First of all I am thankful to Dr. G. S. Hartley for his presence at the Symposium. His presentation, "Micelles: Retrospect and Prospect" was the highlight of the pro- gram. Thanks are due to the officials of the Northeast Regional Meeting for sponsoring the event, to IBM Corporation for permitting me to organize the symposium and to edit these volumes. Thanks are due to our secretary, Us. Julie Hrib, for helping with the correspon- dence typing. I am thankful to my wife, Usha, for sacrificing many hours which rightfully belonged to her, and to my daughter, Anita, and son, Rajesh, for being very nice kids and letting their Daddy work at home. The reviewers should be thanked for their many valu- able comments on the manuscripts. The enthusiasm and cooperation of the contributors, particularly those from overseas, is sincerely acknowledged. The Petroleum Research Fund of the American Chemical Society should be thanked for partial travel assistance to three speakers. K. 1. Mitta1 IBM Corporation East Fishkill Facility Hopewell Junction, New York 12533 CONTENTS OF VOLUME 2 PART IV: REACTIONS IN HICELLES AND HI CELLAR CATALYSIS IN AQUEOUS HEDIA The Kinetic Theory and the Hechanisms of Micellar Effects on Chemical Reactions K. Hartinek, A. K. Yatsimirski, A. V. Levashov and I. V. Berezin . . . . . . ... 489 A General Kinetic Theory of Rate Enhancements for Reactions between Organic Substrates and Hydro- philic Ions in Micellar Systems L. S. Romsted ........ . 509 Laser Photolysis Studies of Photo Redox Processes in Micellar Solutions H. Gratzel. . . . . . . . . . . . . . . . . . . 531 Radiation-Induced Redox Reactions in Hicellar Solutions A.J. Frank. . . . . . . . . ..•...... 549 Radiation-Induced Processes in Nonionic Hicelles K. Kalyanasundaram and J. K. Thomas .. 569 Radiation-Induced Peroxidation in Fatty Acid Soap Micelles L. K. Patterson and J. L. Redpath . . . . . . . 589 Bifunctional Hicellar Catalysis R. A. Hoss, R. C. Nahas, and S. Ramaswami .... 603 The Use of Phase Trallsfer Catalysts with Emulsion and Hicelle Systems in Electro-Organic Synthesis T. C. Franklin and T. Honda ......... . 617 The Catalytic Role of llicelle-Bisulfite Complexation in Vinyl Polymerization O.-K. Kim 627 Discussion 645 ix x CONTENTS OF VOLUME 2 PART V: REACTIONS IN MICELLES AND MICELLAR CATALYSIS IN NONAQUEOUS MEDIA Some Kinetic Studies in the Reversed ~1icellar System- Aerosol OT (Diisooctyl Sulfosuccinate)/H20/ Heptane Solution M. Wong and J. K. Thomas ............ . 647 Catalysis by Cations in Cores of Non-Aqueous Micelles F. M. Fowkes, D. Z. Becher, M. ~rmo, C. Silebi and C. C. Chao. . . .. ....... . 665 Solubilization and Catalysis of Polar Substances in Nonaqueous Surfactant Solutions A. Kitahara and K. Kon-no . . 675 Ligand Exchange Reactions of Hemin and Vitamin B12a in the Presence of Surfactants in Water and in Nonpolar Solvents J. H. Fendler 695 Discussion 711 PART VI: MICROE~LSIONS Theory for the Phase Behavior of Microemulsions M. L. Robbins . . . .. ..... . 713 Stability, Phase Equilibria, and Interfacial Free Energy in Microemulsions E. Ruckenstein. . . . . 755 Light Scattering of a Concentrated W/O Hicro Emulsion; Application of Hodern Fluid Theories A. J. Calj~, W. G. M. Agterof and A. Vrij .... 779 Hicroemulsions Containing Ionic Surfactants S. Friberg and I. Buraczewska ..... 791 Interactions and Reactions in Hicroemulsions R. A. Hackay, K. Letts, and C. Jones. 807 Discussion 817 CONTENTS OF VOLUME 2 PART VII. GENERAL PAPERS Mixed Micelles of Methyl Orange Dye and Cationic Surfactants R. L. Reeves and S. A. Harkaway. . . ...• 819 Anionic Surfactant Complexes with Charged and Uncharged Cellulose Ethers E. D. Goddard and R. B. Hannan ... 835 Proposal for a New Theory of Molecular Transport across Membranes: Implications for Lung Gas Transference B. Ecanow, B. H. Gold, R. Balagot, and R. S. Levinson. 847 Interfacial Tension Minima in Two-Phase liicellar Systems E. Franses, M. S. Bidner and L. E. Scriven .••.. 855 Equilibrium Bicontinuous Structures L. E. Scriven. . . • . . 877 Intramacromolecular Micelles U. P. Strauss .....• 895 Solubilization by Nonionic Surfactants in the HLB- Temperature Range S. Friberg, I. Buraczewska, and J. C. Ravey. . 901 The Effect of Lysoplasmalogen on Some Physical Properties of Dipalmitoyllecithin Bilayers: A Fluorescent Probe Study D. A. N. Morris and J. K. Thomas 913 Concluding Remarks. . • 927 About the Contributors. 931 Subject Index . . . . . 939 CONTENTS OF VOLUME 1 PART I: GENERAL PAPERS The Wide World of Micelles K. L. Mittal and P. Mukerjee. 1 Micelles - Retrospect and Prospect G. S. Hartley ..... . 23 ~1icellization, Solubilization, and Microemulsions L. H. Prince. . . . . . . . . . 45 Biological Implications of Micelle Formation A. T. Florence.. .... 55 Fluorescent Probes for Micellar Systems N. J. Turro, M. W. Geiger, R. R. Hautala and N. E. Schore. .....• • . . . . 75 Micellar Solutions for Improved Oil Recovery V. K. Bansal and D. o. Shah 87 Discussion .. .. ' 115 PART II. THERHODYNMlICS AND KINETICS OF MICELLIZATION IN AQUEOUS MEDIA Thermodynamics of ~licellization of Simple Amphiphiles in Aqueous Media C. Tanford •....•............. 119 Thermodynamics of Amphiphilar Aggregation into ~licelles and Vesicles E. Ruckenstein and R. Nagarajan 133 Thermodynamics of Hice11e Formation K. S. Birdi ....•...•. 151 xiii

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