Preparation of Chitosan-Chrysanthemum Essential Oil Composite Films Based on UHPM and Their Application in Fresh Dendrobium Preservation

WANG Cungang; LIU Lijuan; LIN Hai

doi:10.19554/j.cnki.1001-3563.2026.05.011

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Packaging Engineering ›› 2026, Vol. 47 ›› Issue (5) : 90-99. DOI: 10.19554/j.cnki.1001-3563.2026.05.011

Agro-products Preservation and Food Packaging

Preparation of Chitosan-Chrysanthemum Essential Oil Composite Films Based on UHPM and Their Application in Fresh Dendrobium Preservation

WANG Cungang, LIU Lijuan, LIN Hai^*

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Abstract

The work aims to optimize the technological conditions for preparing chitosan-chrysanthemum essential oil composite films by ultra-high pressure microjet (UHPM) technology and investigate the preservation effect of the composite films on fresh Dendrobium during micro-freezing storage. The key affecting factors for composite film preparation were screened by single-factor experiments, and the preparation process was optimized via response surface methodology with the weighted comprehensive index of tensile strength and elongation at break as the response value. Meanwhile, the effects of the composite films on the total number of colonies, weight loss rate, total soluble solids (TSS) content, peroxidase (POD) activity and sensory evaluation score of fresh Dendrobium stored under micro-freezing conditions were analyzed. The optimal preparation process parameters of the composite films were as follows: chitosan mass fraction 2%, chrysanthemum essential oil mass fraction 0.6%, and UHPM pressure 121 MPa, under which the comprehensive index reached 97.68. The composite films prepared by this process could effectively inhibit microbial growth of Dendrobium during micro-freezing storage, reduce the weight loss rate, alleviate the decrease in TSS content and POD activity, and maintain a high sensory evaluation score. Therefore, UHPM technology is suitable for the preparation of chitosan-chrysanthemum essential oil composite films, which can effectively delay the quality deterioration of fresh Dendrobium during micro-freezing storage with a remarkable preservation effect.

Key words

chitosan / Chrysanthemum essential oil / ultra high-pressure microjet / fresh Dendrobium

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WANG Cungang, LIU Lijuan, LIN Hai. Preparation of Chitosan-Chrysanthemum Essential Oil Composite Films Based on UHPM and Their Application in Fresh Dendrobium Preservation[J]. Packaging Engineering. 2026, 47(5): 90-99 https://doi.org/10.19554/j.cnki.1001-3563.2026.05.011

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