| 氟乐灵微囊的制备、表征及其光稳定性研究 |
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| 引用本文： | 刘亚静,曹立冬,张嘉坤,张靖,赵鹏,李凤敏,黄啟良.氟乐灵微囊的制备、表征及其光稳定性研究[J].农药学学报,2015,17(3):341-347. |
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| 作者姓名： | 刘亚静 曹立冬 张嘉坤 张靖 赵鹏 李凤敏 黄啟良 |
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| 作者单位： | 1.农业部作物有害生物综合治理重点实验室, 中国农业科学院 植物保护研究所, 北京 100193 |
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| 基金项目： | 国家自然科学基金资助项目(31471805;31301701). |
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| 摘 要： | 为增强氟乐灵的光稳定性,提高其有效利用率,以壳聚糖(CS)和甲基丙烯酸甲酯(MMA)为壁材,采用原位聚合法制备了氟乐灵微囊,并测定了其外观形态、粒径及其分布、包封率和载药量,同时研究了其释放特性及其在土壤和水中的光稳定性。结果表明:所制备的氟乐灵微囊呈规则球形;粒径在3~10μm之间,平均粒径为6.5μm;包封率和载药量分别为79%和45%;该微囊具有良好的缓释性能,释放以Fick扩散为主;与氟乐灵乳油相比,氟乐灵微囊的光稳定性显著增强,在试验条件下,其在土壤表面和水中的光解半衰期分别为22 d和173 min。
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| 关 键 词： | 氟乐灵 微囊 原位聚合法 缓释 光稳定性 |
| 收稿时间： | 2/9/2015 12:00:00 AM |
| 修稿时间： | 2015/4/19 0:00:00 |
Preparation and characterization of trifluralin microcapsules and their photo-stability |
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| Liu Yajing,Cao Lidong,Zhang Jiakun,Zhang Jing,Zhao Peng,Li Fengmin and Huang Qiliang.Preparation and characterization of trifluralin microcapsules and their photo-stability[J].Chinese Journal of Pesticide Science,2015,17(3):341-347. |
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| Authors: | Liu Yajing Cao Lidong Zhang Jiakun Zhang Jing Zhao Peng Li Fengmin and Huang Qiliang |
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| Institution: | 1.Key Laboratory of Integrated Pest Management in Crops, Ministry of Agriculture, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China2.Pratacultural College, Gansu Agricultural University, Lanzhou 730070, China |
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| Abstract: | Trifluralin-loaded microcapsules were prepared by in situ polymerization using chitosan and methyl methacrylate as carrier materials in order to enhance its photo-stability and effective utilization. The surface morphology, size and size distribution, encapsulation efficiency and loading content of the resulting microcapsules were determined. The release characteristics and the photo-stability in soil and water of the microcapsules were studied. The trifluralin-loaded microcapsules dispersed as individual particles with a well-defined spherical shape with average size 6.5 μm. Most of the microcapsules were between 3 and 10 μm. The encapsulation efficiency and loading content of the microcapsules were 79% and 45%, respectively. The trifluralin-loaded microcapsules had a good sustained release performance and the release was controlled mainly by Fick diffusion. Compared with trifluralin emulsifiable concentrate, photo-stability of the microcapsules was enhanced with the half-lives 22 d in soil and 173 min in water under the experimental conditions. |
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| Keywords: | trifluralin microcapsule in situ polymerization sustained release photo-stability |
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