Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume 7, Issue 15, Pages 13148-13156Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.9b02319
Keywords
Janus carrier; Topology regulation; Retention; Plant leaf; Pesticide
Categories
Funding
- National Key R&D program of China [2017YFD0200302]
- NSFC [21802166, 21604085]
- Chinese Universities Scientific Fund [2019TC013, 2019TC109]
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Retention, a crucial process in pesticide application, is heavily affected by the extremely low surface energy and micro/nanostructure of plant leaves. The inadequate retention like bouncing, splashing, and drifting often give rise to severe soil and groundwater pollution. In this article, we present an unprecedented topology-regulation approach that significantly contributes to this issue. A series of pesticide-loaded hat-shaped Janus carriers (HJCs) are synthesized via emulsion interfacial polymerization and characterized by scanning electron microscope, thermogravimetric analyzer, energy-dispersive spectrometer, and Fourier transform infrared spectroscopy. Upon spraying on plant leaves, the pesticide-loaded HJCs can embed with the micropapillae and nanosplinters on leaves driven by the hanger-hat topology effect, consequently leading to the enhanced retention evaluated by the deposition and flush resistance experiments. Moreover, the release behavior of pesticide-loaded HJCs is found to match the Ritger-Peppas model and finally achieves sustained release. Additionally, the generality of the HJCs synthetic strategy is also studied and applicable to multiple pesticides. This study not only provides a new strategy for increasing pesticide retention on plant leaves but also opens a promising aspect for the applications of Janus carriers in agriculture.
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