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<p>Developing innovative, sustainable, and cost-effective packaging materials is crucial for addressing the challenge of food preservation and extended shelf life. This study explored the innovative development of an absorbent bioactive aerogel starch incorporated with purple sweet potato peel (PSPp) extract for application in food packaging. Subcritical water (105–150&#xa0;°C) was used to modify the amylose content of starch molecules and reduce the molecular weight of starch polymers. Subsequently, a supercritical CO<sub>2</sub> drying process was employed for the fabrication of the starch aerogel. The resulting aerogels exhibited low density (&lt; 0.2&#xa0;g/cm<sup>3</sup>), high porosity (&gt; 84%), and exceptional water absorption capacity (892–1735%), which make them ideal for moisture regulation in food packaging. Incorporating PSPp extract, which is rich in phenolic compounds, further enhanced the aerogels’ antioxidant activity, with DPPH and ABTS<sup>+</sup> radical scavenging capacities reaching 26.77% and 40.96%, respectively. Furthermore, in vitro release studies demonstrated the controlled release of bioactive compounds, with the optimal release observed in the aerogels treated at 120&#xa0;°C. Application tests on fresh chicken breast revealed the aerogels’ efficiency in absorbing exudates, substantially reducing liquid accumulation and extending shelf life. This study highlights the potential of starch-based bioactive aerogels as sustainable, functional materials for active food packaging.</p>

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Bioactive Absorbent Aerogels from Subcritical Water-Induced High Amylose Content Starch and Antioxidant-Rich Purple Sweet Potato Peel Extracts for Food Preservation

  • 期刊论文

  • 发表日期：

    2025年12月20日

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  • Meseret Araya Tadele,
  • Truc Cong Ho,
  • Jin-Seok Park,
  • Byung-Soo Chun

摘要

Developing innovative, sustainable, and cost-effective packaging materials is crucial for addressing the challenge of food preservation and extended shelf life. This study explored the innovative development of an absorbent bioactive aerogel starch incorporated with purple sweet potato peel (PSPp) extract for application in food packaging. Subcritical water (105–150 °C) was used to modify the amylose content of starch molecules and reduce the molecular weight of starch polymers. Subsequently, a supercritical CO2 drying process was employed for the fabrication of the starch aerogel. The resulting aerogels exhibited low density (< 0.2 g/cm3), high porosity (> 84%), and exceptional water absorption capacity (892–1735%), which make them ideal for moisture regulation in food packaging. Incorporating PSPp extract, which is rich in phenolic compounds, further enhanced the aerogels’ antioxidant activity, with DPPH and ABTS+ radical scavenging capacities reaching 26.77% and 40.96%, respectively. Furthermore, in vitro release studies demonstrated the controlled release of bioactive compounds, with the optimal release observed in the aerogels treated at 120 °C. Application tests on fresh chicken breast revealed the aerogels’ efficiency in absorbing exudates, substantially reducing liquid accumulation and extending shelf life. This study highlights the potential of starch-based bioactive aerogels as sustainable, functional materials for active food packaging.