High-adhesion antimicrobial composite coating incorporating quaternary chitosan and tea tree oil for enhanced preservation of fruits and vegetables

IF 5.4 2区医学 Q2 MATERIALS SCIENCE, BIOMATERIALS

ACS Biomaterials Science & Engineering Pub Date : 2024-11-12 DOI:10.1016/j.foodchem.2024.142007

Ying Liu, Yi Ding, Chao Wang, Jian Luo, Huanhuan Yao, Huili Zhang, Long Xu, Junfan Niu

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Abstract

This study developed high-adhesion quaternary chitosan coatings using amphiphilic HACC-oleic acid conjugates (HACC-OA) to enhance fruit and vegetable preservation. HACC-OA demonstrated improved viscosity and adhesion, providing a stable carrier for tea tree oil (TTO). The resulting TTO@HACC-OA coatings exhibited significantly reduced contact angle (43.7°) and increased retention amount on strawberry surfaces. Furthermore, TTO@HACC-OA demonstrated a lower volatilization rate of TTO (27.8 %) compared to pure TTO (49.5 %) and an enhanced synergistic antimicrobial activity (EC₅₀ = 1.51 mg/mL) against Botrytis cinerea Pers compared to HACC alone (EC₅₀ = 1.58 mg/mL). Preservation experiments revealed that TTO@HACC-OA effectively maintained color and firmness, reduced decay index and weight loss, delayed decline in vitamin C content of strawberries, postponed increase in total phenolic content, and mitigated malondialdehyde accumulation. Therefore, the prepared TTO@HACC-OA composite coating with excellent adhesion ability and preservation effect holds great potential for applications in fruit and vegetable preservation.

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含有季甲壳素和茶树油的高附着力抗菌复合涂层，可提高水果和蔬菜的保鲜效果

本研究利用两亲性 HACC-油酸共轭物（HACC-OA）开发了高粘附性季壳聚糖涂层，以提高水果和蔬菜的保鲜效果。HACC-OA 具有更高的粘度和附着力，为茶树油 (TTO) 提供了稳定的载体。由此产生的 TTO@HACC-OA 涂层显著降低了接触角（43.7°），并增加了在草莓表面的保留量。此外，与纯 TTO（49.5%）相比，TTO@HACC-OA 表现出更低的 TTO 挥发率（27.8%），与单独使用 HACC（EC50 = 1.58 mg/mL）相比，TTO@HACC-OA 增强了对莹莹葡萄孢菌的协同抗菌活性（EC50 = 1.51 mg/mL）。保鲜实验表明，TTO@HACC-OA 能有效保持草莓的色泽和硬度，降低腐烂指数和重量损失，延缓维生素 C 含量的下降，延缓总酚含量的增加，并减轻丙二醛的积累。因此，制备的 TTO@HACC-OA 复合涂层具有优异的附着能力和保鲜效果，在果蔬保鲜领域具有很大的应用潜力。

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来源期刊

ACS Biomaterials Science & Engineering Materials Science-Biomaterials

CiteScore

10.30

自引率

3.40%

发文量

413

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