{"id":1274,"date":"2021-12-09T11:22:40","date_gmt":"2021-12-09T10:22:40","guid":{"rendered":"https:\/\/iop.fnwi.uva.nl\/scm\/wordpress_test\/?p=1274"},"modified":"2026-10-19T21:40:36","modified_gmt":"2026-10-19T20:40:36","slug":"emulsion-stability-and-rheology","status":"publish","type":"post","link":"https:\/\/iop.fnwi.uva.nl\/scm\/index.php\/2021\/12\/09\/emulsion-stability-and-rheology\/","title":{"rendered":"Emulsion stability and rheology"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"1274\" class=\"elementor elementor-1274\" data-elementor-settings=\"[]\">\n\t\t\t\t\t\t\t<div class=\"elementor-section-wrap\">\n\t\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-522426ec elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"522426ec\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-7cfeef8b\" data-id=\"7cfeef8b\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-99c854b elementor-widget elementor-widget-text-editor\" data-id=\"99c854b\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.5.5 - 03-02-2022 *\/\n.elementor-widget-text-editor.elementor-drop-cap-view-stacked .elementor-drop-cap{background-color:#818a91;color:#fff}.elementor-widget-text-editor.elementor-drop-cap-view-framed .elementor-drop-cap{color:#818a91;border:3px solid;background-color:transparent}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap{margin-top:8px}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap-letter{width:1em;height:1em}.elementor-widget-text-editor .elementor-drop-cap{float:left;text-align:center;line-height:1;font-size:50px}.elementor-widget-text-editor .elementor-drop-cap-letter{display:inline-block}<\/style>\t\t\t\t\n<div style=\"font-family:inherit; color:#43545A; line-height:1.7;\">\n\n  <!-- INTRODUCTION -->\n  <p style=\"font-size:19px; line-height:1.7; margin:0 0 18px 0;\">\n    <strong style=\"color:#344A52; font-weight:600;\">\n      What makes mayonnaise thick, cosmetics stable, or paint flow smoothly? The answer often lies in emulsions: tiny droplets of one liquid suspended in another, whose interactions can transform the way a material behaves.\n    <\/strong>\n  <\/p>\n\n  <p style=\"font-size:19px; line-height:1.7; margin:0 0 26px 0;\">\n    In the Soft Matter group, we investigate what keeps emulsions stable, what causes them to separate, and how their microscopic structure controls their flow. From droplet interactions to the transition between solid-like and liquid-like behaviour, our research connects fundamental physics to the design of everyday materials.\n  <\/p>\n\n  <!-- RESEARCH IMAGE -->\n  <div style=\"margin:28px 0 32px 0;\">\n    <img\n      src=\"https:\/\/iop.fnwi.uva.nl\/scm\/images\/research\/Riande_emulsions.png\"\n      alt=\"Research illustration of emulsion stability and rheology\"\n      style=\"display:block; width:100%; max-width:760px; height:auto; border-radius:12px; margin:0 auto;\"\n    \/>\n    <p style=\"font-size:13px; color:#829196; text-align:center; margin:10px 0 0 0;\">\n      Exploring the microscopic structure and mechanical behaviour of emulsions.\n    <\/p>\n  <\/div>\n\n  <!-- TWO RESEARCH DIRECTIONS -->\n  <div style=\"margin:30px 0 34px 0;\">\n\n    <div style=\"border-left:3px solid #10708A; padding:3px 0 5px 20px; margin-bottom:24px;\">\n      <div style=\"font-size:12px; letter-spacing:1.2px; text-transform:uppercase; font-weight:700; color:#10708A; margin-bottom:7px;\">\n        Stability &amp; Destabilisation\n      <\/div>\n      <p style=\"font-size:17px; line-height:1.65; margin:0;\">\n        Emulsions naturally tend to separate, yet surfactants and particles can keep them stable for long periods. We study how these stabilising mechanisms work and use controlled compression to reveal how droplets deform, interact, and eventually merge.\n      <\/p>\n    <\/div>\n\n    <div style=\"border-left:3px solid #10708A; padding:3px 0 5px 20px;\">\n      <div style=\"font-size:12px; letter-spacing:1.2px; text-transform:uppercase; font-weight:700; color:#10708A; margin-bottom:7px;\">\n        Jamming &amp; Rheology\n      <\/div>\n      <p style=\"font-size:17px; line-height:1.65; margin:0;\">\n        When droplets become densely packed, emulsions can behave like soft solids. Only when a critical stress is exceeded do they begin to flow. We investigate this transition, known as yielding, and how droplet concentration and additives shape the material&#8217;s mechanical properties.\n      <\/p>\n    <\/div>\n\n  <\/div>\n\n  <!-- PUBLICATIONS -->\n  <div style=\"border-top:1px solid #DFE8EA; padding-top:26px; margin-top:30px;\">\n\n    <h3 style=\"font-size:23px; font-weight:650; color:#243E47; margin:0 0 7px 0;\">\n      Selected Research\n    <\/h3>\n\n    <p style=\"font-size:16px; color:#667A80; margin:0 0 22px 0;\">\n      Recent publications exploring the stability, structure, and flow of emulsions.\n    <\/p>\n\n    <!-- PUBLICATION 1 -->\n    <div style=\"padding:0 0 20px 0; margin-bottom:20px; border-bottom:1px solid #E5ECEE;\">\n      <div style=\"font-size:12px; color:#10708A; font-weight:700; letter-spacing:1px; margin-bottom:7px;\">\n        2023 &nbsp; \/ &nbsp; EMULSION STABILITY\n      <\/div>\n      <a href=\"https:\/\/doi.org\/10.1039\/D2SM01375D\" target=\"_blank\" rel=\"noopener noreferrer\" style=\"font-size:19px; font-weight:600; line-height:1.45; color:#10708A; text-decoration:none;\">\n        Is there a difference between surfactant-stabilised and Pickering emulsions? &nearr;\n      <\/a>\n      <p style=\"font-size:14px; color:#78888D; margin:6px 0 9px 0;\">\n        R. I. Dekker et al. &nbsp;\u00b7&nbsp; <em>Soft Matter<\/em>\n      <\/p>\n      <p style=\"font-size:16px; line-height:1.65; margin:0;\">\n        Comparing emulsions stabilised by surfactants and solid particles to uncover how their interfacial properties and resistance to coalescence differ.\n      <\/p>\n    <\/div>\n\n    <!-- PUBLICATION 2 -->\n    <div style=\"padding:0 0 20px 0; margin-bottom:20px; border-bottom:1px solid #E5ECEE;\">\n      <div style=\"font-size:12px; color:#10708A; font-weight:700; letter-spacing:1px; margin-bottom:7px;\">\n        2022 &nbsp; \/ &nbsp; EMULSION RHEOLOGY\n      <\/div>\n      <a href=\"https:\/\/doi.org\/10.1016\/j.jnnfm.2022.104938\" target=\"_blank\" rel=\"noopener noreferrer\" style=\"font-size:19px; font-weight:600; line-height:1.45; color:#10708A; text-decoration:none;\">\n        Rheology of emulsions with polymer solutions as the continuous phase &nearr;\n      <\/a>\n      <p style=\"font-size:14px; color:#78888D; margin:6px 0 9px 0;\">\n        R. I. Dekker, H. V. M. Kibbelaar, A. Deblais &amp; D. Bonn &nbsp;\u00b7&nbsp; <em>Journal of Non-Newtonian Fluid Mechanics<\/em>\n      <\/p>\n      <p style=\"font-size:16px; line-height:1.65; margin:0;\">\n        Investigating how flexible and rigid polymers influence the flow properties, shear-thinning behaviour, and yield stress of concentrated emulsions.\n      <\/p>\n    <\/div>\n\n    <!-- PUBLICATION 3 -->\n    <div style=\"padding:0 0 4px 0;\">\n      <div style=\"font-size:12px; color:#10708A; font-weight:700; letter-spacing:1px; margin-bottom:7px;\">\n        2022 &nbsp; \/ &nbsp; PICKERING EMULSIONS\n      <\/div>\n      <a href=\"https:\/\/doi.org\/10.1016\/j.colsurfa.2022.128512\" target=\"_blank\" rel=\"noopener noreferrer\" style=\"font-size:19px; font-weight:600; line-height:1.45; color:#10708A; text-decoration:none;\">\n        Ethyl cellulose nanoparticles as stabilizers for Pickering emulsions &nearr;\n      <\/a>\n      <p style=\"font-size:14px; color:#78888D; margin:6px 0 9px 0;\">\n        H. V. M. Kibbelaar, R. I. Dekker et al. &nbsp;\u00b7&nbsp; <em>Colloids and Surfaces A<\/em>\n      <\/p>\n      <p style=\"font-size:16px; line-height:1.65; margin:0;\">\n        Revealing how nanoparticles adsorb at droplet interfaces to stabilise emulsions, while also creating attractive interactions that influence their mechanical behaviour.\n      <\/p>\n    <\/div>\n\n  <\/div>\n\n  <!-- CONTACT -->\n  <div style=\"background:#F2F7F8; border-radius:10px; padding:17px 21px; margin-top:32px;\">\n    <div style=\"font-size:12px; font-weight:700; letter-spacing:1px; color:#10708A; text-transform:uppercase; margin-bottom:5px;\">\n      Research Contact\n    <\/div>\n    <p style=\"font-size:16px; color:#43545A; margin:0;\">\n      <strong style=\"color:#344A52;\">Riande Dekker<\/strong>\n      &nbsp;\u00b7&nbsp;\n      <a href=\"mailto:r.i.dekker@uva.nl\" style=\"color:#10708A; text-decoration:none;\">\n        r.i.dekker@uva.nl &nearr;\n      <\/a>\n    <\/p>\n  <\/div>\n\n<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>What makes mayonnaise thick, cosmetics stable, or paint flow smoothly? The answer often lies in emulsions: tiny droplets of one liquid suspended in another, whose interactions can transform the way a material behaves. In the Soft Matter group, we investigate what keeps emulsions stable, what causes them to separate, and how their microscopic structure controls [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":1275,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[15],"tags":[],"_links":{"self":[{"href":"https:\/\/iop.fnwi.uva.nl\/scm\/index.php\/wp-json\/wp\/v2\/posts\/1274"}],"collection":[{"href":"https:\/\/iop.fnwi.uva.nl\/scm\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/iop.fnwi.uva.nl\/scm\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/iop.fnwi.uva.nl\/scm\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/iop.fnwi.uva.nl\/scm\/index.php\/wp-json\/wp\/v2\/comments?post=1274"}],"version-history":[{"count":6,"href":"https:\/\/iop.fnwi.uva.nl\/scm\/index.php\/wp-json\/wp\/v2\/posts\/1274\/revisions"}],"predecessor-version":[{"id":5033,"href":"https:\/\/iop.fnwi.uva.nl\/scm\/index.php\/wp-json\/wp\/v2\/posts\/1274\/revisions\/5033"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/iop.fnwi.uva.nl\/scm\/index.php\/wp-json\/wp\/v2\/media\/1275"}],"wp:attachment":[{"href":"https:\/\/iop.fnwi.uva.nl\/scm\/index.php\/wp-json\/wp\/v2\/media?parent=1274"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/iop.fnwi.uva.nl\/scm\/index.php\/wp-json\/wp\/v2\/categories?post=1274"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/iop.fnwi.uva.nl\/scm\/index.php\/wp-json\/wp\/v2\/tags?post=1274"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}