Composite Gel Systems: Materials, Formation Behaviors and Functional Food Packaging Applications

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

Deadline for manuscript submissions: 30 June 2026 | Viewed by 1299

Special Issue Editors


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Guest Editor
Shenzhen Key Laboratory of Food Nutrition and Health, College of Chemistry and Environmental Engineering and Institute for Innovative Development of Food Industry, Shenzhen University, Shenzhen 518060, China
Interests: gels; structure-function-application of polysaccharides; macromolecular interaction; oil droplets and extraction; food digestion and absorption

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Guest Editor
Tianjin Key Laboratory of Food Quality and Health, State Key Laboratory of Food Nutrition and Safety, Tianjin University of Science & Technology, Tianjin 300457, China
Interests: gel; delivery systems; functional films; food preservation

Special Issue Information

Dear Colleagues,

Gels derived from green, edible biopolymers, such as polysaccharides and proteins, have gained increasing attention due to their biodegradability, safety, and tunable physicochemical properties. Composite gel-based functional materials for sustainable and functional food packaging applications are becoming a hotspot in research. Recent studies on composite functional films have focused on integrating multiple functionalities—including antimicrobial, antioxidant, barrier, and intelligent sensing mechanisms—into single edible or biodegradable gel matrices. Researchers are actively exploring interpenetrating polymer networks and multi-component delivery systems to improve the mechanical performance, environmental stability, and bioactivity of composite functional films in food preservation. However, some challenges remain, such as insufficient mechanical properties of functional membranes, the poor long-term stability of active ingredients, unstable release kinetics, and incomplete understanding of the gel formation mechanism and structure–function relationship in multiphase composite systems.

This Special Issue welcomes research exploring the formation mechanisms of composite gels, structure–function relationships, and the encapsulation and controlled release of active ingredients. Studies addressing multi-layer film architectures, stimulus-responsive behavior, and novel processing strategies (e.g., electrospinning, layer-by-layer assembly, 3D printing) are highly encouraged.

Dr. Juncai Tu
Dr. Jun Guo
Guest Editors

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Keywords

  • green edible biopolymers
  • composite film structure and function
  • gel formation mechanism
  • structure–activity relationship
  • active ingredient delivery systems

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Published Papers (1 paper)

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Review

28 pages, 4178 KB  
Review
Natural pH-Sensitive Intelligent Edible Gel-Based Packaging: From Structural Design to Fruit Freshness Monitoring
by Tong Zhao, Lulu Wang, Xinyue Wang, Meng Zhang, Xin Zhang, Chen Li, Qian Zhang, Yan Zhao and Lixia Wang
Gels 2026, 12(2), 169; https://doi.org/10.3390/gels12020169 - 14 Feb 2026
Viewed by 1038
Abstract
The escalating demand for global fruit logistics underscores the urgency of packaging innovations to reconcile preservation efficiency with environmental sustainability, particularly addressing microplastic pollution from conventional plastics and safety hazards posed by synthetic pH-sensitive pigments. Natural pH-sensitive intelligent edible gel-based packaging, which integrates [...] Read more.
The escalating demand for global fruit logistics underscores the urgency of packaging innovations to reconcile preservation efficiency with environmental sustainability, particularly addressing microplastic pollution from conventional plastics and safety hazards posed by synthetic pH-sensitive pigments. Natural pH-sensitive intelligent edible gel-based packaging, which integrates non-toxic indicators into biopolymer gel matrices, offers a viable solution by visually tracking freshness through colorimetric responses to pH fluctuations during storage and transportation. This review systematically synthesizes recent progress in material design, including the development of edible films and coatings, and evaluates the functional mechanisms of natural pH indicators within these systems. Applications across diverse fruit categories demonstrate their efficacy in delaying ripening, inhibiting microbial growth, and signaling quality degradation via dynamic color shifts. Despite enabling real-time, visual freshness monitoring, challenges in mechanical robustness, water resistance, and scalable manufacturing remain. Future advancements should prioritize the integration of multifunctional systems, such as gas conditioning technologies and bioactive components, to enhance practical performance and align with sustainable food preservation objectives, ultimately reducing food waste and elevating consumer safety standards. Full article
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