Supramolecular Cyclodextrin Nanofibers for Active Food Preservation: Current Trends and Future Perspectives.

Cyclodextrin (CD)-based supramolecular nanofibers (NFs) have emerged as an advanced class of multifunctional materials for active food packaging by integrating host-guest supramolecular chemistry with electrospun nanofibrous architectures. The unique hydrophobic cavity and hydrophilic exterior of CDs enable the encapsulation of a wide range of bioactive compounds, including essential oils, natural antioxidants, antimicrobials, and volatile active agents, thereby enhancing their solubility, stability, controlled release, and preservation efficacy. This review comprehensively discusses the molecular structure and inclusion complexation mechanisms of CDs, recent advances in polymer-assisted and polymer-free electrospinning strategies, and the design of CD-based supramolecular nanofibers for food preservation. Particular emphasis is placed on the relationship between fiber morphology, supramolecular interactions, and controlled release behavior, which collectively govern antimicrobial, antioxidant, moisture management, and barrier properties. Recent developments involving biodegradable polymers, hybrid nanofibrous systems, and cyclodextrin-based metal-organic frameworks (CD-MOFs) are critically summarized, highlighting their roles in improving encapsulation efficiency, mechanical stability, and multifunctional performance. The review further compares CD-based nanofibers with other advanced encapsulation technologies, including liposomes, solid lipid nanoparticles, nanostructured lipid carriers, nanoemulsions, polymeric nanoparticles, microspheres, and conventional MOFs, providing a comprehensive evaluation of their loading capacity, release kinetics, scalability, cost, and regulatory suitability for food-contact applications. Representative applications in the preservation of fruits, vegetables, meat, seafood, dairy products, and bakery products demonstrate significant improvements in microbial inhibition, oxidation resistance, ethylene and volatile organic compound adsorption, and shelf-life extension through sustained delivery of natural preservatives. Ultimately, the current challenges, including large-scale manufacturing, long-term stability, regulatory approval, and commercialization, are discussed together with future directions, focusing on smart packaging, stimuli-responsive delivery systems, intelligent sensing, biodegradable multifunctional materials, and sustainable industrial implementation.