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Colloids and Interfaces
Special Issues
Rheology of Complex Fluids and Interfaces: 2nd Edition
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Rheology of Complex Fluids and Interfaces: 2nd Edition

A special issue of Colloids and Interfaces (ISSN 2504-5377).

Deadline for manuscript submissions: 15 October 2025 | Viewed by 302

Special Issue Editors

Dr. Cecile Lemaitre

E-Mail Website
Guest Editor
National School of Chemical Industries (ENSIC), Université de Lorraine, Nancy, France
Interests: rheology; fluid mechanics of complex fluids; CFD; suspension; emulsions
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Philippe Marchal

E-Mail Website
Guest Editor
Laboratoire Réactions et Génie des Procédés, Université de Lorraine, Nancy, France
Interests: polymeric materials; material characterization; glass transition; flow; powders; rheology
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Emulsions and foams, stabilized by particles, proteins, polymers, or surfactants, can be found in numerous industrial applications—particularly in the food, cosmetics and pharmaceutical industries. In these complex formulated products, the presence of fluid–fluid interfaces induces complex rheological behavior and hydrodynamics. In order to control the stability of these systems and to provide them with the desired end-use properties, it is fundamental to understand the relationship between their interfacial microstructure and their bulk rheological properties. This Special Issue, following the success of the first edition, aims at covering the recent advances in structural rheology, emphasizing the link between interfacial rheology, volumic rheology, and macroscopic end-use properties.

We welcome the submission of papers on topics including, but not limited to, the following:

  • Surfactant-, polymer-, protein-, particle-laden interfaces;
  • Interfacial rheometry and tensiometry;
  • Hydrodynamics and colloidal transport at interfaces;
  • Emulsification and foaming, emulsion and foam stability;
  • Structural modeling of interfacial vs. volumic rheology;
  • Dynamics and agglomeration under flow;
  • Multiphase evolving or reacting systems, especially at the interfaces;
  • Deformation of living cells.

Dr. Cecile Lemaitre
Prof. Dr. Philippe Marchal
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Colloids and Interfaces is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • emulsion
  • foam
  • interface
  • rheology
  • transport at interfaces

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Related Special Issue

Published Papers (1 paper)

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Research

17 pages, 2732 KiB  
Article
Influence of Cellulose Nanocrystals and Surfactants on Catastrophic Phase Inversion and Stability of Emulsions
by Daniel Kim and Rajinder Pal
Colloids Interfaces 2025, 9(4), 46; https://doi.org/10.3390/colloids9040046 - 11 Jul 2025
Viewed by 83
Abstract
This study presents the first quantitative comparison of catastrophic phase inversion behavior of water-in-oil emulsions stabilized by nanocrystalline cellulose (NCC) and molecular surfactants with different headgroup charge types: anionic (sodium dodecyl sulfate referred to as SDS), cationic (octadecyltrimethylammonium chloride referred to as OTAC), [...] Read more.
This study presents the first quantitative comparison of catastrophic phase inversion behavior of water-in-oil emulsions stabilized by nanocrystalline cellulose (NCC) and molecular surfactants with different headgroup charge types: anionic (sodium dodecyl sulfate referred to as SDS), cationic (octadecyltrimethylammonium chloride referred to as OTAC), nonionic (C12–14 alcohol ethoxylate referred to as Alfonic), and zwitterionic (cetyl betaine referred to as Amphosol). By using conductivity measurements under controlled mixing and pendant drop tensiometry, this study shows that NCC markedly delays catastrophic phase inversion through interfacial jamming, whereas surfactant-stabilized systems exhibit concentration-dependent inversion driven by interfacial saturation. Specifically, NCC-stabilized emulsions exhibited a nonlinear increase in the critical aqueous phase volume fraction required for inversion, ranging from 0.253 (0 wt% NCC) to 0.545 (1.5 wt% NCC), consistent with enhanced resistance to inversion typically associated with the formation of rigid interfacial layers in Pickering emulsions. In contrast, surfactant-stabilized systems exhibited a concentration-dependent inversion trend with opposing effects. At low concentrations, limited interfacial coverage delayed inversion, while at higher concentrations, increased surfactant availability and interfacial saturation promoted earlier inversion and favored the formation of oil-in-water structures. Pendant drop tensiometry confirmed negligible surface activity for NCC, while all surfactants significantly lowered interfacial tension. Despite its weak surface activity, NCC imparted strong coalescence resistance above 0.2 wt%, attributed to steric stabilization. These findings establish distinct mechanisms for governing phase inversion in particle- versus surfactant-stabilized systems. To our knowledge, this is the first study to quantitively characterize the catastrophic phase inversion behavior of water-in-oil emulsions using NCC. This work supports the use of NCC as an effective stabilizer for emulsions with high internal phase volume. Full article
(This article belongs to the Special Issue Rheology of Complex Fluids and Interfaces: 2nd Edition)
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