Functional Applications of Silica in Biodegradable Packaging Materials

BAO Yan; DONG Wenli; GUO Ruyue; YU Sike; CHEN Lihua

doi:10.19554/j.cnki.1001-3563.2025.23.012

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Packaging Engineering ›› 2025, Vol. 46 ›› Issue (23) : 113-128. DOI: 10.19554/j.cnki.1001-3563.2025.23.012

Advanced Materials

Functional Applications of Silica in Biodegradable Packaging Materials

BAO Yan^1,*, DONG Wenli¹, GUO Ruyue¹, YU Sike¹, CHEN Lihua²

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Abstract

To address the bottlenecks of insufficient mechanical and barrier properties, as well as limited functionality, in biodegradable packaging materials, the work aims to systematically summarize recent research progress on the functional modification of these materials through the incorporation of abundant, low-toxicity, and structurally tunable silica (SiO₂) microspheres, with the goal of enhancing their performance and broadening their applications. Firstly, the structural characteristics and common preparation methods of solid SiO₂ microspheres, mesoporous SiO₂ nanoparticles, and hollow mesoporous SiO₂ nanoparticles were summarized. Secondly, the regulatory mechanisms of SiO₂ on the mechanical strength, barrier properties, thermal stability, optical performance, and biodegradability of degradable packaging materials were elaborated. Furthermore, the loading and controlled release of SiO₂ on active substances were analyzed. To sum up, the preparation methods for SiO₂ microspheres have become increasingly well-established. As a functional filler, SiO₂ can address the needs of biodegradable packaging materials in terms of mechanical strength enhancement, barrier property improvement, and thermal stability enhancement by tailoring its structure and properties. The ability of SiO₂ microspheres to load and controllably release active substances endows them with significant application potential in active packaging, intelligent indicator packaging, anti-counterfeiting packaging, and thermal insulation protective packaging. Future research should focus on four key aspects, including the long-term safety of SiO₂ microspheres, green preparation processes, multifunctional synergy, and the use of machine learning to optimize material composition and structural design.

Key words

SiO₂ / degradable packaging / nanocomposites / controlled release / active packaging

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BAO Yan, DONG Wenli, GUO Ruyue, YU Sike, CHEN Lihua. Functional Applications of Silica in Biodegradable Packaging Materials[J]. Packaging Engineering. 2025, 46(23): 113-128 https://doi.org/10.19554/j.cnki.1001-3563.2025.23.012

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