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Bioinspired Janus starch film with dual functionality via citral nanoemulsion-mediated interfacial self-assembly for fresh-cut fruits and vegetables preservation

文献类型： 外文期刊

作者： Xie, Ying 1 ; Sun, Yuying 3 ; Li, Yawen 3 ; Ding, Ke 1 ; Zhang, Shikai 1 ; Xu, Saiqing 1 ; Li, Huan 1 ; Lin, Shuhua 1 ; Shan, Yang 1 ; Wang, Rongrong 3 ; Ding, Shenghua 1 ;

作者机构： 1.Hunan Acad Agr Sci, Hunan Agr Prod Proc Inst, DongTing Lab, Hunan Prov Key Lab Fruits & Vegetables Storage Pro, Changsha 410125, Peoples R China

2.Hunan Univ, Coll Biol, Longping Branch, Changsha 410125, Peoples R China

3.Hunan Agr Univ, Coll Food Sci & Technol, Changsha 410128, Peoples R China

关键词： Starch film; Janus structure; Rapid self-assembly; Fresh-cut fruits and vegetables preservation

期刊名称：FOOD HYDROCOLLOIDS （ 影响因子：12.4； 五年影响因子：13.3 ）

ISSN： 0268-005X

年卷期： 2026 年 171 卷

页码：

收录情况： SCI

摘要： Starch-based films are promising biodegradable materials for food packaging but are limited by hydrophilicity and poor functional properties. Herein, this study proposed a citral nanoemulsion (NEs)-mediated interfacial engineering strategy to construct a self-assembled Janus starch film (NE-S/M) with dual hydrophobic-active functionality for fresh-cut fruits and vegetables preservation. Specifically, starch extracted from waste rice was composited with citral NEs to form bioactive films (NE-S), which were further rapidly self-assembled with myristic acid (MA) to create a Janus hydrophobic structure. Structural characterization and molecular dynamics simulation revealed that citral NEs acted as molecular bridges to enhance the MA adsorption energy barrier, enabling MA to self-assemble into a dense hydrophobic layer via free deposition. Especially, the 10 %NE-S/M Janus film exhibited exceptional hydrophobicity (water contact angle: 118.22 degrees), UV-blocking (0 % transmittance at 200-400 nm), mechanical robustness (tensile strength enhanced by 180.75 %), and barrier properties (water vapor permeability reduced by 62.39 %). Furthermore, the Janus film synergized the outstanding antioxidant and antimicrobial properties of citral. Compared to starch film, the 10 %NE-S/M Janus film exhibited a three-fold increase in free radical scavenging capacity and notable inhibition on Staphylococcus aureus, Escherichia coli, and Botrytis cinerea with relative inhibition rates of 98.63 %, 91.56 %, and 42.53 %, respectively. Preservation tests demonstrated that 10 %NE-S/M film significantly reduced weight loss, suppressed microbial proliferation, and delayed quality deterioration in fresh-cut kiwifruit and chili peppers throughout storage. Crucially, this rapid self-assembly strategy successfully achieved hydrophobicity and bioactive properties in starch-based film and offered a sustainable solution for active food packaging with multifunctional performance.

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