Emulsification of Partially Miscible Liquids Using Colloidal Particles: Nonspherical and Extended Domain Structures

@article{citeulike:2800338, abstract = {Abstract: We present microscopy studies of particle-stabilized emulsions with unconventional morphologies. The emulsions comprise pairs of partially miscible fluids and are stabilized by colloids. Alcohol-oil mixtures are employed; silica colloids are chemically modified so that they have partial wettability. We create our morphologies by two distinct routes: starting with a conventional colloid-stabilized emulsion or starting in the single-fluid phase with the colloids dispersed. In the first case temperature cycling leads to the creation of extended fluid domains built around some of the initial fluid droplets. In the second case quenching into the demixed region leads to the formation of domains which reflect the demixing kinetics. The structures are stable due to a jammed, semisolid, multilayer of colloids on the liquid-liquid interface. The differing morphologies reflect the roles in formation of the arrested state of heterogeneous and homogeneous nucleation and spinodal decomposition. The latter results in metastable, bicontinuous emulsions with frozen interfaces, at least for the thin-slab samples, investigated here.}, address = {SUPA, School of Physics, University of Edinburgh, Edinburgh, EH9 3JZ, United Kingdom, Collaborative Optical Spectroscopy, Micromanipulation and Imaging Centre (COSMIC), University of Edinburgh, Edinburgh, EH9 3JZ, United Kingdom, Institut f\"{u}r Physik der kondensierten Materie, Heinrich-Heine-Universit\"{a}t, Universit\"{a}tstrasse 1, D-40225 D\"{u}sseldorf, Germany, and Surfactant \& Colloid Group, Department of Chemistry, University of Hull, Hull, HU6 7RX, United Kingdom}, author = {Clegg, P. S. and Herzig, E. M. and Schofield, A. B. and Egelhaaf, S. U. and Horozov, T. S. and Binks, B. P. and Cates, M. E. and Poon, W. C. K. }, citeulike-article-id = {2800338}, doi = {10.1021/la063707t}, journal = {Langmuir}, keywords = {colloids, cool, emulsion, phase, poon, system}, month = {May}, number = {11}, pages = {5984--5994}, posted-at = {2008-05-15 01:23:24}, priority = {2}, title = {Emulsification of Partially Miscible Liquids Using Colloidal Particles: Nonspherical and Extended Domain Structures}, url = {http://dx.doi.org/10.1021/la063707t}, volume = {23}, year = {2007} }

TY - JOUR ID - citeulike:2800338 L3 - citeulike-article-id:2800338 TI - Emulsification of Partially Miscible Liquids Using Colloidal Particles: Nonspherical and Extended Domain Structures JF - Langmuir VL - 23 IS - 11 SP - 5984 EP - 5994 AD - SUPA, School of Physics, University of Edinburgh, Edinburgh, EH9 3JZ, United Kingdom, Collaborative Optical Spectroscopy, Micromanipulation and Imaging Centre (COSMIC), University of Edinburgh, Edinburgh, EH9 3JZ, United Kingdom, Institut für Physik der kondensierten Materie, Heinrich-Heine-Universität, Universitätstrasse 1, D-40225 Düsseldorf, Germany, and Surfactant & Colloid Group, Department of Chemistry, University of Hull, Hull, HU6 7RX, United Kingdom N2 - Abstract: We present microscopy studies of particle-stabilized emulsions with unconventional morphologies. The emulsions comprise pairs of partially miscible fluids and are stabilized by colloids. Alcohol-oil mixtures are employed; silica colloids are chemically modified so that they have partial wettability. We create our morphologies by two distinct routes: starting with a conventional colloid-stabilized emulsion or starting in the single-fluid phase with the colloids dispersed. In the first case temperature cycling leads to the creation of extended fluid domains built around some of the initial fluid droplets. In the second case quenching into the demixed region leads to the formation of domains which reflect the demixing kinetics. The structures are stable due to a jammed, semisolid, multilayer of colloids on the liquid-liquid interface. The differing morphologies reflect the roles in formation of the arrested state of heterogeneous and homogeneous nucleation and spinodal decomposition. The latter results in metastable, bicontinuous emulsions with frozen interfaces, at least for the thin-slab samples, investigated here. KW - colloids KW - cool KW - emulsion KW - phase KW - poon KW - system AU - Clegg, PS AU - Herzig, EM AU - Schofield, AB AU - Egelhaaf, SU AU - Horozov, TS AU - Binks, BP AU - Cates, ME AU - Poon, WCK PY - 2007/05/22/ UR - http://dx.doi.org/10.1021/la063707t ER -