数字农科院2.0

Surface Polyphenol Coordination Drives Efficient Foliar Depo-sition of Pesticide Nanocarriers

文献类型： 外文期刊

作者： Manli Yu; Bo Cui; Lidong Cao; Qiliang Huang; Junwei Yao; Zhanghua Zeng

关键词： foliar affinity; tannic acid; polylactic acid; interfacial modification; abamectin-loaded nanocapsules

期刊名称： Nanomaterials

ISSN：

年卷期： 2025 年

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收录情况： SCIE（2025版）

摘要： Pesticides play the key roles in modern agricultural activities. Effective deposition of pes-ticides is highly desirable for improving utilization and reducing side effects. Electrostatic attraction, hydrogen and covalent bonds have been widely investigated to regulate the fo-liar affinity of pesticides. However, metal coordination bonding is yet to be fully explored for foliar deposition of pesticides. In ours work, tannic acid (TA) decorated abamectin-loaded PLA nanospheres (Abam@PLA) via the metal chelating ability of poly-phenols (Abam@PLA-TA) for improving the abamectin (Abam) retention on the surfaces of leaves have been developed. The chemical properties and morphological features of Abam@PLA-TA were characterized by SEM, TEM, FT-IR and fluorescent imaging. The fo-liar retention of Abam@PLA-TA demonstrated that the tannic acid coating could signifi-cantly improve the adhesion ability and deposition efficiency of pesticides toward crop leaves, which were mainly resulted from the hydrogen bonds between polyphenols of TA and the polar groups of wax layer. Moreover, Abam@PLA-TA exhibited excellent photo-stability capacity than that of abamectin technical concentrate, which helps to protect the light-sensitive pesticides from UV decomposition. This strategy opens up a facile but powerful avenue for the design of foliage adhesive systems and a new opportunity for pesticides in efficient utilization.

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