Properties and Structure of Plant-Based Emulsion Gels

A special issue of Gels (ISSN 2310-2861). This special issue belongs to the section "Gel Analysis and Characterization".

Deadline for manuscript submissions: 30 June 2025 | Viewed by 2783

Special Issue Editors


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Guest Editor
Food Chemistry & Technology Department, Teagasc Food Research Centre, Fermoy, P61 C996 Cork, Ireland
Interests: emulsion gels; valorisation; alternative proteins; biomass

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Guest Editor
Institute of Animal Science and Technology, Universitat Politècnica de València, 46022 Valencia, Spain
Interests: biopolymers; plant waste valorisation; characterization; modelling; artificial intelligence

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Guest Editor
Forschungszentrum Jülich (FZJ), Jülich, Germany
Interests: neutron scattering; soft matter; fuel cells; microemulsions; microgels; neutron scattering instrumentation

Special Issue Information

Dear Colleagues,

Emulsion gels are semi-solid or solid materials characterized by a three-dimensional network structure produced from an emulsion. Also known as an emulgel or gelled emulsion, they have gained significant interest in diverse applications, especially in the food, pharmaceutical and cosmetic industries. Emulsion gels are commonly used as carriers of bioactive substances and fat substitutes due to their unique properties, such as stability and tunable morphology and microstructure. These qualities contribute to the development of materials with specific mechanical and functional properties.

The composition of emulsion gels involves a polymeric network formed by a gelling agent with oil droplets encapsulated, or with oil droplets either encapsulated within the network or aggregated alongside solid particles irreversibly adsorbed at the oil–water interface. Currently, different researchers consider that the structural and the mechanical properties of the emulsion gels are influenced by different factor, including the processing methods, the gelling matrix, the presence of emulsifying agents and the interaction between components. However, novel plant-based materials are gaining attention, and the gelling interactions for emulsion gels elaboration are still unexplored.

Considering the differentiated characteristics for emulsion gel elaboration, this Special section will focus on elucidating the complexities of the properties and structural interactions in the study of plant-based emulsion gels. A variety of characterization techniques, from microscopic to macroscopic, together with modelling techniques will help to broaden our view of these systems. The overarching goal is to incite research endeavors for novel discoveries within the realm of emulsion gel networks and structures.

Dr. Cynthia Fontes-Candia
Dr. Daniel Alexander Méndez Reyes
Dr. Olaf Holderer
Guest Editors

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Keywords

  • emulsion gels
  • food application
  • fat replacers
  • lipid carriers
  • bioactive carriers
  • biopolymers
  • encapsulation
  • novel characterization methods
  • molecular modelling
  • multi-scale characterization

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Published Papers (1 paper)

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Research

18 pages, 2769 KiB  
Article
Development and Characterization of Hybrid Meat Analogs from Whey Protein-Mushroom Composite Hydrogels
by Ramdattu Santhapur, Disha Jayakumar and David Julian McClements
Gels 2024, 10(7), 446; https://doi.org/10.3390/gels10070446 - 5 Jul 2024
Cited by 2 | Viewed by 2417
Abstract
There is a need to reduce the proportion of animal-derived food products in the human diet for sustainability and environmental reasons. However, it is also important that a transition away from animal-derived foods does not lead to any adverse nutritional effects. In this [...] Read more.
There is a need to reduce the proportion of animal-derived food products in the human diet for sustainability and environmental reasons. However, it is also important that a transition away from animal-derived foods does not lead to any adverse nutritional effects. In this study, the potential of blending whey protein isolate (WPI) with either shiitake mushroom (SM) or oyster mushroom (OM) to create hybrid foods with enhanced nutritional and physicochemical properties was investigated. The impact of OM or SM addition on the formation, microstructure, and physicochemical attributes of heat-set whey protein gels was therefore examined. The mushroom powders were used because they have relatively high levels of vitamins, minerals, phytochemicals, and dietary fibers, which may provide nutritional benefits, whereas the WPI was used to provide protein and good thermal gelation properties. A variety of analytical methods were used to characterize the structural and physicochemical properties of the WPI-mushroom hybrids, including confocal microscopy, particle electrophoresis, light scattering, proximate analysis, differential scanning calorimetry, thermogravimetric analysis, dynamic shear rheology, textural profile analysis, and colorimetry. The charge on whey proteins and mushroom particles went from positive to negative when the pH was raised from 3 to 9, but whey protein had a higher isoelectric point and charge magnitude. OM slightly increased the thermal stability of WPI, but SM had little effect. Both mushroom types decreased the lightness and increased the brownness of the whey protein gels. The addition of the mushroom powders also decreased the hardness and Young’s modulus of the whey protein gels, which may be because the mushroom particles acted as soft fillers. This study provides valuable insights into the formation of hybrid whey protein-mushroom products that have desirable physiochemical and nutritional attributes. Full article
(This article belongs to the Special Issue Properties and Structure of Plant-Based Emulsion Gels)
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