阿维菌素
杀虫剂
化学
智能聚合物
聚合
纳米囊
聚氨酯
核化学
聚合物
材料科学
纳米技术
有机化学
医学
生物
解剖
纳米颗粒
农学
作者
Ming Zhao,Zhenhai Chen,Hao Li,Huayao Chen,Xinhua Zhou,Hongjun Zhou
标识
DOI:10.1016/j.carbpol.2022.120260
摘要
Inefficient use of traditional pesticides causes serious environmental pollution. Stimuli-responsive pesticide formulations improve the utilization efficiency of target pests and reduce harm to non-target organisms and the environment. Herein, multi-stimuli-responsive avermectin (AVM) polyurea microcapsules (AVM@CM-SS-PU) are prepared by interfacial polymerization with modified carboxymethyl cellulose CMC-SS-NH2 as the wall material and hexadecane as the temperature-responsive core. The microcapsules are 3.90 μm in size and the encapsulation efficiency of AVM is 88.23 %. The photostability of AVM@CM-SS-PU is 5-times that of AVM solution. The insecticidal effect of AVM solution and AVM emulsifiable concentrate (EC) decreases to 13.3 % and 16.6 %, respectively, after UV irradiation for 180 min, whereas that of AVM@CM-SS-PU still remains at 50.0 %. AVM@CM-SS-PU has better foliar affinity and releases under the stimuli of temperature, glutathione, pH, cellulase, and urease. Hence, it has high insecticidal activity and biosafety. This smart controlled-release pesticide formulation provides a promising solution for green agriculture.
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