Geometrically and Micromechanically Optimized Sprayable Short Fibers for Precision Pesticide Delivery

文献类型： 外文期刊

第一作者： Shangguan, Wenjie

作者： Shangguan, Wenjie;Song, Xinyu;Liu, Hongyi;Wang, Teng;Huang, Qiliang;Zhao, Pengyue;Cao, Chong;Yu, Manli;Cao, Lidong;Bian, Qiang;Song, Xinyu

作者机构：

关键词： biodegradable materials; electrospun short fibers; high aspect ratio; micromechanical response; pesticide delivery

期刊名称：SMALL （ 影响因子：12.1； 五年影响因子：12.5 ）

ISSN： 1613-6810

年卷期： 2025 年 21 卷 35 期

页码：

收录情况： SCI

摘要： Pesticides are crucial for global food security, but improving their efficient use to reduce environmental losses remains a key challenge for sustainable agriculture. One promising solution is enhancing pesticide adhesion to hydrophobic waxy leaf surface. Inspired by the dynamics of pinball machines, it is developed sprayable short-fiber carriers composed of biodegradable poly(3-hydroxybutyrate-4-hydroxybutyrate) using electrospinning technique and aminolysis. These suitable high-aspect-ratio fibers effectively anchored within gaps between rice leaf papillae, achieving 3.19-fold (Wilhelmy) and 1.47-fold (40 degrees-spray) higher retention than spherical particles, along with 2.59-fold (fluorescence) and 1.43-fold (pesticide) improvements in anti-runoff performance. Finite element analysis showed that the fiber carrier enhanced contact area and frequency with papillae and achieved uniform strain distribution. The sprayable short-fiber suspension exhibited good stability, controlled release, antifungal activity against Botrytis cinerea and Rhizoctonia solani, and biosafety for zebrafish. Especially under simulated rain conditions, the antifungal efficacy against R. solani was significantly higher than that of a commercial suspension. By integrating geometric and micromechanical advantages, this innovative carrier advances precision pesticide delivery, addressing adhesion inefficiencies while reducing environmental losses to support sustainable crop protection.

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