Fifteen Years of Innovation in Food Biopolymers and Sustainable Packaging: A Personal Perspective and Retrospective

Over the past 15 years, food packaging science has undergone a transformative paradigm shift, transitioning from bio-inert plastic barriers to dynamic, functional bio-based packaging networks. This perspective provides an integrative synthesis of fifteen years of dedicated research into biopolymer chemistry, physical modification, and nanoscale engineering. Key scientific contributions reviewed include: (1) chemical and physical modification of tropical and native starches (sago, cassava, potato, tapioca) for thermoplastic bioplastics; (2) extraction and functionalization of non-mammalian protein matrices, particularly Pekin duck feet gelatin and cold-water fish gelatin, as sustainable alternatives to mammalian gelatin; (3) active bionanocomposites engineered with metal oxide nanoparticles (ZnO, TiO2, SiO2, nanoclays) and bioactive phytochemicals (essential oils, phenolic extracts) for potent antimicrobial and antioxidant protection; (4) smart colorimetric packaging systems incorporating natural anthocyanins for real-time freshness monitoring; and (5) micro/nano-encapsulation techniques utilizing native hydrocolloids (Persian gum, Zedo gum, cress seed gum) for bioactive protection. This paper critically addresses historical bottlenecks (including moisture sensitivity, mechanical fragility, scale-up dynamics, and nanomaterial safety) and outlines strategic pathways for integrating biopolymers into a circular economy.