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首页> 外文期刊>Journal of Applied Polymer Science >Biodegradable microspheres of poly(3-hydroxybutyrate)/poly(ε- caprolactone) loaded with malathion pesticide: Preparation, characterization, and in vitro controlled release testing
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Biodegradable microspheres of poly(3-hydroxybutyrate)/poly(ε- caprolactone) loaded with malathion pesticide: Preparation, characterization, and in vitro controlled release testing

机译：马拉硫磷农药负载的聚（3-羟基丁酸酯）/聚（ε-己内酯）的可生物降解微球：制备，表征和体外控释试验

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In this investigation, our aim was to evaluate the performance of a controlled release of malathion pesticide loaded in microspheres of pure polymers of poly(3-hydroxybutyrate) and poly(ε-caprolactone) (PCL) and of blends of these polymers with compositions of 70/30, 80/20, 90/10, 95/5, and 97/3 w/w. Microspheres were obtained by an emulsion-evaporation method to load a model pesticide. Scanning electron microscopy and differential scanning calorimetry were used to characterize the effect of the pesticide on the morphology and particles size of the biodegradable microspheres. The interaction between the matrix and pesticide was determined by Fourier transform infrared spectroscopy. The test for controlled release was performed in an aqueous medium, and malathion was quantified by ultraviolet spectroscopy. The results show that the release of malathion was improved with the PCL content in the blends; this indicated the possibility of modulating the release of the pesticide in these biodegradable blends.
机译：在这项研究中，我们的目的是评估聚（3-羟基丁酸酯）和聚（ε-己内酯）（PCL）的纯聚合物以及这些聚合物与下列成分的共混物在微球中负载的马拉硫磷农药的控释性能。 70 / 30、80 / 20、90 / 10、95 / 5和97/3 w / w。通过乳液蒸发法获得微球以加载模型农药。扫描电子显微镜和差示扫描量热法用于表征农药对可生物降解微球的形态和粒径的影响。基质与农药之间的相互作用通过傅里叶变换红外光谱法确定。在水性介质中进行控释试验，并通过紫外光谱法定量马拉硫磷。结果表明，共混物中PCL的含量可改善马拉硫磷的释放。这表明有可能调节这些可生物降解混合物中农药的释放。

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