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<p>Traditional coating materials have limitations in barrier properties and biocompatibility. This study extracted chitosan from the pupal shells of black soldier fly (BSF) using enzymatic deproteinization and prepared a CMCS/CMC/Gly composite film. The film, composed of carboxymethyl chitosan (CMCS), carboxymethyl cellulose (CMC), and glycerol (Gly), aims to extend grape freshness. The experimental results showed that the CMCS/CMC/Gly composite film had good light transmittance (93.83%), dense film structure, and could effectively reduce water vapor transmission rate (4.05 ± 0.03&#xa0;g&#xa0;m (m<sup>2</sup> s Pa)<sup>−1</sup>) and water solubility (6.73 ± 0.21 × 10<sup>−5</sup>&#xa0;g&#xa0;s<sup>−1</sup>). After immersing the grapes in the coating solution, the decay rate of grapes was significantly reduced after 14&#xa0;days of storage, while maintaining the hardness (1.89 ± 0.02 N), vitamin C content (5.28 ± 0.03&#xa0;mg/100&#xa0;g) and total soluble solids content (15.13 ± 0.50%) of the grapes, which had a good preservation effect. In summary, the BSF-derived carboxymethyl chitosan composite film provides a green and efficient solution for the preservation of grapes, which has important application potential and research value.</p>

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Preparation of black soldier fly-derived carboxymethyl chitosan composite film and its application in grape preservation

  • 期刊论文

  • 发表日期：

    2026年3月16日

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  • Yirong Tao,
  • Qiang Xiong,
  • Zeyi Zhang,
  • Zhengjie Liu,
  • Xinfu Li

摘要

Traditional coating materials have limitations in barrier properties and biocompatibility. This study extracted chitosan from the pupal shells of black soldier fly (BSF) using enzymatic deproteinization and prepared a CMCS/CMC/Gly composite film. The film, composed of carboxymethyl chitosan (CMCS), carboxymethyl cellulose (CMC), and glycerol (Gly), aims to extend grape freshness. The experimental results showed that the CMCS/CMC/Gly composite film had good light transmittance (93.83%), dense film structure, and could effectively reduce water vapor transmission rate (4.05 ± 0.03 g m (m2 s Pa)−1) and water solubility (6.73 ± 0.21 × 10−5 g s−1). After immersing the grapes in the coating solution, the decay rate of grapes was significantly reduced after 14 days of storage, while maintaining the hardness (1.89 ± 0.02 N), vitamin C content (5.28 ± 0.03 mg/100 g) and total soluble solids content (15.13 ± 0.50%) of the grapes, which had a good preservation effect. In summary, the BSF-derived carboxymethyl chitosan composite film provides a green and efficient solution for the preservation of grapes, which has important application potential and research value.