文献类型：期刊文献

英文题名：Tannic Acid–Iron Nano–Microcapsule with Dense Interfacial Adsorption for Improved Pesticide Retention on Hydrophobic Leaves

作者：Han, Xu[1,2] Qiao, Yuqing[2] Wang, Qifan[2] Zhang, Yi[2] Liu, He[3] Shang, Shibin[3] Song, Zhanqian[3] Li, Jian[2]

第一作者：Han, Xu

机构：[1] College of Chemical and Materials Engineering, Zhejiang Agriculture and Forestry University, Zhejiang, Lin’an, 311300, China; [2] Jiangsu Province Key Laboratory of Biomass Energy and Materials, College of Forestry, Northwest Agriculture and Forestry University, Shaanxi, Yangling, 712100, China; [3] Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Jiangsu, Nanjing, 210042, China

年份：2025

外文期刊名：SSRN

收录：EI(收录号：20250348064)

语种：英文

外文关键词：Adhesion - Biochemistry - Drop formation - Insecticides - Pesticide effects - Safety testing - Self assembly - Surface chemistry - System stability

摘要：Pesticide runoff poses a serious environmental threat owing to the weak adhesion of some pesticides to hydrophobic leaf surfaces. Inspired by the strong binding affinity of polyphenol structures, we designed a nano–microcapsule pesticide delivery system based on tannic acid (TA), which is rich in phenolic hydroxyl groups. The interfacial self-assembly of TA with the nonionic surfactant polysorbate 80 (T80) considerably enhances pesticide adhesion, while the incorporation of ferric ions (Fe3+) further improves system stability. Experimental results demonstrate that this system effectively reduces the splashing and bouncing of pesticide droplets on hydrophobic leaf surfaces during application. Upon contact with the leaf, the droplets rapidly anchor and adsorb onto the hydrophobic waxy surface, lowering surface tension and promoting droplet deposition. This ensures strong adhesion and high stickiness, even under rainy conditions. Interfacial behavior analysis and molecular dynamics simulations reveal that the system forms a dense adsorption layer on the hydrophobic wax surface, resulting in strong interfacial interactions. Consequently, the enhanced pesticide retention on the leaf surface improves its protective and curative effects. Furthermore, safety evaluation tests indicate that the nano–microcapsule system exhibits low toxicity to nontarget organisms. This study provides a solution for efficient and environmentally friendly application of pesticides. ? 2025, The Authors. All rights reserved.