State of the Art of Colloid and Interface Science in the Iberian Peninsula

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Guest Editor
Department of Physical Chemistry, Complutense University of Madrid, 28040 Madrid, Spain
Interests: polyelectrolyte; surfactants; interfaces; polymer; layer by layer; colloids; emulsions; interfacial rheology; biophysics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The Iberian Peninsula has a rich tradition of scientific contributions in this field, and this Special Issue will serve as a comprehensive overview of the latest developments and innovative research from this region.  This Special Issue will highlight the latest research and advances in the field of colloids and interfaces within the Iberian Peninsula, but contributions from researchers outside the Iberian Peninsula are also welcome. 

This Special Issue will cover a wide range of topics including, but not limited to, the synthesis and characterization of colloidal systems, novel applications of colloids in medicine, cosmetics and food science, interfacial phenomena, and advances in nanotechnology and materials science. Through original research articles, reviews and case studies, this Special Issue will provide valuable insights into the state-of-the-art methods and technologies being developed by Iberian researchers.

Contributions from leading academic institutions, research centers and industry experts will ensure a diverse and robust collection of articles. This Special Issue will foster collaboration, inspire future research, and increase the visibility of the Iberian scientific community in the global arena. It is a tribute to the ongoing efforts and achievements of researchers in Spain and Portugal, showcasing their significant role in advancing the field of colloids and interfaces.

Dr. Eduardo Guzmán
Guest Editor

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Keywords

  • colloids
  • interfaces
  • nanotechnology
  • synthesis and characterization
  • interfacial phenomena
  • material science
  • biomedical applications
  • industrial applications

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Published Papers (1 paper)

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Research

19 pages, 4221 KiB  
Article
Bio-Based Interpolyelectrolyte Complexes for the Stabilization of Pickering-like Emulsions
by Francisco Joel Guerrero-Vasquez, Francisco Ortega, Ramón G. Rubio and Eduardo Guzmán
Colloids Interfaces 2025, 9(1), 9; https://doi.org/10.3390/colloids9010009 - 22 Jan 2025
Viewed by 457
Abstract
This work studies the stabilization of Pickering-like emulsions using dispersions of interpolyelectrolyte complexes (IPECs) formed by chitosan (CS) and sodium alginate (ALG), two polymers from natural resources, as the aqueous phase and soybean oil as the oil phase. The ability of these bio-based [...] Read more.
This work studies the stabilization of Pickering-like emulsions using dispersions of interpolyelectrolyte complexes (IPECs) formed by chitosan (CS) and sodium alginate (ALG), two polymers from natural resources, as the aqueous phase and soybean oil as the oil phase. The ability of these bio-based IPECs to form stable emulsions was evaluated by varying the compositional ratio of CS to ALG (Z-ratio) and the oil volume fraction (ϕo). Turbidity, zeta potential, and dynamic light scattering measurements revealed the dependence of IPEC properties on the Z-ratio, with phase separation observed near stoichiometric ratios. Phase diagram analysis showed that stable oil-in-water (O/W) and water-in-oil (W/O) emulsions could be obtained under certain combinations of the Z-ratio and ϕo. Emulsion stability increased with higher Z-ratios due to increased interfacial activity of the complexes and reduced coalescence. Emulsions with high ϕo exhibited transitions from discrete droplets to bicontinuous interfacially jammed emulsion gels (bijels), suggesting tunable morphologies. These results highlight the potential of CHI-ALG IPECs as eco-friendly and efficient stabilizers of Pickering-like emulsions for applications in food, cosmetics and pharmaceuticals. Full article
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