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<p>The sustained-release absorbent pad composed of the absorbent pad (AP) and the sustained-release film were prepared. Lemongrass essential oil and basil essential oil inclusion complexes of β-cyclodextrin (LEO-IC and BEO-IC) were loaded into chitosan/sodium alginate (CS/SA) films in various ratios (4:0, 3:1, 2:2, 1:3, and 0:4), denoted as CS/SA-1 to CS/SA-5, respectively. The incorporation of EO-ICs did not significantly affect the mechanical properties of the films. The CS/SA-2 film had the highest antibacterial effectiveness according to the in-vitro experiment, and the CS/SA-5 film demonstrated the highest sustained-release DPPH scavenging activity. Based on these results, CS/SA-1, CS/SA-2, and CS/SA-5 films were selected to be combined with AP, forming lemongrass composite film/AP (LC-F/AP), basil composite film/AP (BC-F/AP), and lemongrass-basil composite film/AP (LBC-F/AP), respectively. The preservation effects of these pads on large yellow croaker fillets stored at 4&#xa0;°C were evaluated. The total viable count (TVC) and total volatile basic nitrogen (TVB-N) experiments showed that the LC-F/AP, BC-F/AP, and LBC-F/AP group extended the shelf-life of the fillets to about day 8. The sustained-release pads also maintained the water holding capacity of the fillets.</p>

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Preparation of chitosan/sodium alginate films loaded with encapsulating essential oils and their modified sustained-release pads for large yellow croaker fillet (Larimichthys crocea) preservation

  • 期刊论文

  • 发表日期：

    2026年2月11日

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  • Yun-Fang Qian,
  • Cheng-Jian Shi,
  • Lu Sun,
  • Run-Jian Gao,
  • Sheng-Ping Yang

摘要

The sustained-release absorbent pad composed of the absorbent pad (AP) and the sustained-release film were prepared. Lemongrass essential oil and basil essential oil inclusion complexes of β-cyclodextrin (LEO-IC and BEO-IC) were loaded into chitosan/sodium alginate (CS/SA) films in various ratios (4:0, 3:1, 2:2, 1:3, and 0:4), denoted as CS/SA-1 to CS/SA-5, respectively. The incorporation of EO-ICs did not significantly affect the mechanical properties of the films. The CS/SA-2 film had the highest antibacterial effectiveness according to the in-vitro experiment, and the CS/SA-5 film demonstrated the highest sustained-release DPPH scavenging activity. Based on these results, CS/SA-1, CS/SA-2, and CS/SA-5 films were selected to be combined with AP, forming lemongrass composite film/AP (LC-F/AP), basil composite film/AP (BC-F/AP), and lemongrass-basil composite film/AP (LBC-F/AP), respectively. The preservation effects of these pads on large yellow croaker fillets stored at 4 °C were evaluated. The total viable count (TVC) and total volatile basic nitrogen (TVB-N) experiments showed that the LC-F/AP, BC-F/AP, and LBC-F/AP group extended the shelf-life of the fillets to about day 8. The sustained-release pads also maintained the water holding capacity of the fillets.