期刊论文

Release behavior and bioactivity evaluation of pyraclostrobin/silica microspheres

中文

农药学学报

1008-7303

2018

20

4

506-513

10.16801/j.issn.1008-7303.2018.0065

:化学肥料 2016YFD0201200:农药减施增效综合技术研发专项 15K064:湖南省高校重点实验室平台开放基金

本校为第一机构

为了对二氧化硅载药体系进行评价,以吡唑醚菌酯为模式农药,利用其与正硅酸乙酯在碱性条件下的水解缩合反应,以十六烷基三甲基溴化铵(CTAB)为模板剂,制备了吡唑醚菌酯/二氧化硅微球。通过扫描电子显微镜、Nicolet iS5傅里叶变换红外光谱及高效液相色谱等表征了微球的表面形态和化学结构,测定了其在水中的光解速率;并采用透析袋法探讨了该微球在不同pH值和不同温度下的缓释行为,通过菌丝生长速率法测定了该微球对稻瘟病菌的毒力,评价了其生物活性。结果表明:所制备的吡唑醚菌酯/二氧化硅微球外观形貌较为规整,粒径在0.998~1.428 μm之间,其最大载药量可达50.73%。该微球在碱性条件下的释药速率快于...

In order to evaluate the silica drug-loading system, the pyraclostrobin/silica microsphere was prepared by the hydrolysis and polycondensation of tetraethyl orthosilicate under alkaline conditions with pyraclostrobin as the pattern pesticide. The surface morphology and the chemical structure of the microsphere were characterized by scanning electron microscope (SEM), Nicolet iS5 Fourier transform infrared spectrometer (FTIR) and high performance liquid chromatography (HPLC). And its photodegradation rate in water was also determined.The release...