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Amphiphilicity-Driven Small Alcohols Regulate the Flexibility of Pesticide-Loaded Microcapsules for Better Foliar Adhesion and Utilization
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2023-04-19 , DOI: 10.1021/acsami.3c01221 Haichao Cao 1 , Yue Chen 1 , Zhigang Qian 2 , Tingjie Huang 3 , Nan Zou 1 , Daxia Zhang 1 , Wei Mu 1, 4 , Beixing Li 1 , Feng Liu 1
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2023-04-19 , DOI: 10.1021/acsami.3c01221 Haichao Cao 1 , Yue Chen 1 , Zhigang Qian 2 , Tingjie Huang 3 , Nan Zou 1 , Daxia Zhang 1 , Wei Mu 1, 4 , Beixing Li 1 , Feng Liu 1
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The foliar loss of pesticides causes serious utilization decline and environmental risk. On the basis of biomimetics, pesticide-loaded microcapsules (MCs) with spontaneous deformation on foliar micro/nanostructures, like the snail suction cup, are prepared by interfacial polymerization. By controlling the usage or types of small alcohols in the MC preparation system, the flexibility of MCs is tunable. Through the investigation of emulsions and MC structures, we discover that the migration and distribution of small alcohols driven by amphiphilicity affect the process of interfacial polymerization between polyethylene glycol and 4,4-methylenediphenyl diisocyanate. By hydrophobic modification of the polymer and competition for oil monomers of small alcohols, the thickness and compactness of shells are reduced, whereas the density of the core is increased. As a result of the regulation in structures, the flexibility of MCs is improved significantly. In particularly, the MCs-N-pentanol (0.1 mol kg–1) with the best flexibility show strong scouring resistance on varied foliar structures, sustained release property on the air/solid interface, and persistent control effect against foliar diseases. The pesticide-loaded soft MCs provide an effective way to improve pesticide foliar utilization.
中文翻译：
两亲性驱动的小分子醇调节载有农药的微胶囊的柔韧性，以获得更好的叶面粘附和利用
农药的叶面损失导致严重的利用率下降和环境风险。在仿生学的基础上，通过界面聚合制备了在叶面微/纳米结构上具有自发变形的农药负载微胶囊（MCs），如蜗牛吸盘。通过控制 MC 制备系统中小分子醇的用量或类型，可以调节 MC 的灵活性。通过对乳液和MC结构的研究，我们发现两亲性驱动的小分子醇的迁移和分布影响聚乙二醇与4,4-亚甲基二苯基二异氰酸酯之间的界面聚合过程。通过聚合物的疏水改性和小分子醇对油单体的竞争，降低了壳的厚度和致密性，而核心的密度增加了。由于结构上的调节，MC的灵活性显着提高。特别是，MCs-N-戊醇（0.1 mol kg–1 ) 具有最好的柔韧性，对不同的叶面结构表现出很强的耐冲刷性，在空气/固体界面上的缓释性能，以及对叶面病害的持久控制效果。载有农药的软 MC 提供了提高农药叶面利用率的有效途径。
更新日期：2023-04-19
中文翻译：
两亲性驱动的小分子醇调节载有农药的微胶囊的柔韧性，以获得更好的叶面粘附和利用
农药的叶面损失导致严重的利用率下降和环境风险。在仿生学的基础上，通过界面聚合制备了在叶面微/纳米结构上具有自发变形的农药负载微胶囊（MCs），如蜗牛吸盘。通过控制 MC 制备系统中小分子醇的用量或类型，可以调节 MC 的灵活性。通过对乳液和MC结构的研究，我们发现两亲性驱动的小分子醇的迁移和分布影响聚乙二醇与4,4-亚甲基二苯基二异氰酸酯之间的界面聚合过程。通过聚合物的疏水改性和小分子醇对油单体的竞争，降低了壳的厚度和致密性，而核心的密度增加了。由于结构上的调节，MC的灵活性显着提高。特别是，MCs-N-戊醇（0.1 mol kg–1 ) 具有最好的柔韧性，对不同的叶面结构表现出很强的耐冲刷性，在空气/固体界面上的缓释性能，以及对叶面病害的持久控制效果。载有农药的软 MC 提供了提高农药叶面利用率的有效途径。
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