论文部分内容阅读
以PBS/PLA共混物为复合载体,嘧菌酯和苯醚甲环唑为包埋有效成分,聚乙烯醇(PVA-1788)为分散剂,采用溶剂挥发法制备了嘧菌酯·苯醚甲环唑PBS/PLA微球。通过光学显微镜、扫描电子显微镜、Nicolet 6700型傅立叶变换红外光谱仪、高效液相色谱(HPLC)等表征复配农药微球的性质,采用透析袋法测定其缓释性能。结果表明,所得的嘧菌酯·苯醚甲环唑PBS/PLA微球中嘧菌酯的载药量和包埋率分别为14.30%、85.06%,苯醚甲环唑的载药量和包埋率为9.47%、90.18%,且微球球形规整,平均粒径为7.20μm。嘧菌酯·苯醚甲环唑PBS/PLA微球具有良好的缓释性能,并且2种活性成分的释放量之比与其最佳复配比接近,可以达到增效目的。
In this study, azoxystrobin and phenylephrine were prepared by the solvent evaporation method using the PBS / PLA blend as the composite carrier, azoxystrobin and difenoconazole as the active ingredient, and polyvinyl alcohol (PVA-1788) as the dispersant Methylciazole PBS / PLA microspheres. The properties of compound pesticide microspheres were characterized by optical microscope, scanning electron microscopy, Nicolet 6700 Fourier transform infrared spectroscopy and high performance liquid chromatography (HPLC). The dialysis bag method was used to determine the sustained release properties. The results showed that the azoxystrobin loading rate and embedding rate of azoxystrobin / difenoconazole PBS / PLA microspheres were 14.30% and 85.06%, respectively. Buried rate of 9.47%, 90.18%, and microspheres spherical shape, the average particle size of 7.20μm. Azoxystrobin and difenoconazole PBS / PLA microspheres with good sustained-release properties, and the ratio of the release of the two active ingredients with the best matching ratio close to achieve synergistic goals.