Dual stimuli-responsive fungicide carrier based on hollow mesoporous silica/hydroxypropyl cellulose hybrid nanoparticles

文献类型： 外文期刊

第一作者： Gao, Yunhao

作者： Gao, Yunhao;Liu, Yu;Qin, Xueyin;Li, Donglin;Wan, Hu;Zhu, Fuxing;Li, Jianhong;He, Shun;Gao, Yunhao;Guo, Ziping;Li, Chenggang;Zhang, Zhuo

作者机构：

关键词： Controlled release; Dual stimuli-responsive; Pyraclostrobin; Hollow mesoporous silica; Hydroxypropyl cellulose

期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：10.588； 五年影响因子：10.129 ）

ISSN： 0304-3894

年卷期： 2021 年 414 卷

页码：

收录情况： SCI

摘要： The controlled release of pesticides based on nanoparticle platforms has emerged as a new technology for increasing the efficiency of pesticides and for reducing environmental pollution because of their size-dependent and target-modifying properties. In the present study, pH/cellulase dual stimuli-responsive controlled-release formulations (PYR-HMS-HPC) were designed by grafting hydroxypropyl cellulose onto pyraclostrobin-loaded hollow mesoporous silica nanoparticles via an ester linkage. The PYR-HMS-HPC formulations were characterized by Fourier transform infrared spectroscopy, thermogravimetric analyzer, transmission electron microscope and scanning electron microscope. The results demonstrated that PYR-HMS-HPC with a loading capacity of 12.1 wt% showed excellent pyraclostrobin release behaviors in response to acidic environments and the introduction of cellulase, could effectively prevented pyraclostrobin from photolysis. Compared with commercial pyraclostrobin formulations, the PYR-HMS-HPC formulations showed much stronger and statistically significant fungicidal activity against Magnaporthe oryzae from 7 to 21 days. Furthermore, the Allium cepa chromosome aberration assay demonstrated that the PYR-HMS-HPC formulations reduced the genotoxicity of pyraclostrobin. These pH/ cellulase dual stimuli-responsive controlled-release formulations are of great interest for sustainable on-demand crop disease protection.

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