Food Packaging, Preservation and Processing
Summary
Modern food systems integrate packaging, preservation and processing to deliver safe, nutritious and appealing products. Packaging strategies—ranging from modified-atmosphere and vacuum systems to active and intelligent materials—protect against mechanical damage, moisture, oxygen and microbial contamination while enabling traceability and convenience. Preservation techniques include thermal treatments (pasteurisation, retorting, ultra-high-temperature), chemical methods (acidification, antioxidants, preservatives) and physical approaches (drying, freezing, high-pressure, pulsed electric fields, irradiation). Together these inhibit spoilage organisms and enzymes with minimal impact on nutritional and sensory qualities. Processing covers a spectrum of unit operations—heating, cooling, separation, emulsification and encapsulation—optimised for energy efficiency, product consistency and waste reduction. Emerging trends focus on bio-derived and biodegradable packaging, integrated barrier and bioactive functionalities, computational process design, and alignment with circular-economy principles to extend shelf life, reduce food loss and respond to consumer demand for minimally processed, sustainable foods.
Research from Nature Portfolio
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Research from all publishers
A mobile “FOX” processing unit combining a spiral filter and pulsed electric fields has been demonstrated for freshly pressed tomato juice. Life-cycle assessment showed a 15 % reduction in environmental impact compared with conventional thermal pasteurisation while achieving equivalent microbial safety, illustrating the promise of decentralised, low-temperature processing for short-chain food supply networks.
A recent review of non-thermal food technologies summarises advances in high-pressure processing, pulsed electric fields, pulsed light, cold plasma and ultrasound. These methods achieve effective microbial inactivation and enzyme control across juices, dairy, meats and produce, extending shelf life and preserving fresh-like sensory and nutritional quality to meet consumer demand for minimally processed products.
Jammed Pickering emulsion gels have been engineered using silica nanoparticles and amine-terminated polyethylene glycol. These shear-thinning, thermally stable gels exhibit controlled release of encapsulated agents under simulated gastrointestinal conditions and strong adhesion at wet interfaces, offering a versatile platform for active packaging to deliver antimicrobials, antioxidants or flavours.
Food Packaging, Preservation and Processing publication trend
The graph below shows the total number of articles in food packaging, preservation and processing across all publications each year (not limited to Nature Index journals).
Technical terms
Active packaging: Packaging systems that include functional agents—antimicrobials, antioxidants or gas scavengers—designed to interact with food and inhibit spoilage.
Intelligent packaging: Packaging that monitors and communicates product conditions (temperature, pH, freshness) via embedded sensors or indicators to ensure safety and quality.
Modified atmosphere packaging (MAP): Technique replacing the air inside a package with a specific gas mixture (N₂, CO₂, O₂) to slow microbial growth, oxidation and produce respiration.
High-pressure processing (HPP): Non-thermal preservation method subjecting packaged foods to pressures up to 600 MPa to inactivate pathogens and enzymes while retaining fresh sensory attributes.
Pulsed electric fields (PEF): Application of short, high-voltage pulses to foods in a conductive medium to permeabilise and inactivate microbial cells with minimal heating.
References
- Jammed Pickering Emulsion Gels. Advanced Science (2024).
- Non-thermal Technologies for Food Processing. Frontiers in Nutrition (2021).
- Sustainable food chains designed for optimised resource use: Optimising downscaled food chains for sustainable resource use: A comprehensive case study on tomato juice. Journal of Cleaner Production (2024).
- Packaging of Perishable Food Products.
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