期刊
CHEMICAL ENGINEERING JOURNAL
卷 396, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2020.125233
关键词
Boron nitride nanoplatelets; Hybrid nanocomposites; Nanoconfinement effect; Nano-carrier-facilitated properties; Controlled delivery for pesticides
资金
- National Natural Science Foundation of China [21576303]
- Natural Science Foundation of Guangdong Province [2017A030311003]
- Science Technology Program of Guangzhou, China [201903010011]
- Innovation Team of Modern Agricultural Industry Technology System of Guangdong Province [2019KJ140]
- Innovation Team Project by the Department of Education of Guangdong Province [2018KCXTD015]
With increasing global food demand, the production and protection of agricultural crops in safe and secure fashion has become a critical issue. Herein, we report a novel type of nanopesticide based on avermectin (AVM) and composite nanocarriers made from the functionalization boron nitride nanoplatelets (BNNP) with 3-mercaptopropyl trimethoxysilane (MPTMS) and poly(ethylene glycol) diacrylate (PEG). Such nanocarriers exhibit a high pesticide loading capacity (181.9 +/- 5.2 mg/g) due to their layered nanostructure and their favorable interactions with AVM molecules achieved through hydrophobic effect, p-p stacking, and electrostatic interactions. By changing pH from 7 to 11, the release kinetics could be transformed to a zero-order process from a first-order process, with about a two-to-three-fold increase in the release rate. The pH-responsive behavior was ascribed to hydrolysis of ester groups of PEG under alkaline conditions. These pesticide nanocarriers reduced the degradation rate of AVM against UV irradiation about 30%. In summary, novel nanopesticides based on BN composite nanocarriers opens new avenues for the delivery of hydrophobic pesticides in the field of agriculture and crop protection.
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