氟乐灵微球的制备及其控释效果研究

钱坤; 彭鑫亚; 薛霏; 谷安宇; 李小林; 徐雨然; 胡月; 蓝月; 赵恒科; 何林

doi:10.16801/j.issn.1008-7303.2017.0104

氟乐灵微球的制备及其控释效果研究

doi: 10.16801/j.issn.1008-7303.2017.0104

1.
西南大学植物保护学院, 重庆 400715
2.
云南省农业科学院粮食作物研究所, 昆明 650205
3.
浙江省化工研究院有限公司国家南方农药创新中心浙江基地, 杭州 310023

基金项目:

云南省科技计划项目（2015BB009）;重庆博士后科学特别基金会资助项目（XM2012003）

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出版历程
- 收稿日期: 2017-04-26
- 刊出日期: 2017-12-14

Preparation of trifluralin microspheres and its controlled release performance

1.
College of Plant Protection, Southwest University, Chongqing 400715, China
2.
Grain Crops Research Institute, Yunnan Academy of Agricultural Sciences, Kunming 650205, China
3.
Zhejiang Research Institute of Chemical Industry Ltd., National South Agrochemical Creation Center's Zhejiang Base, Hangzhou 310023, China

摘要

摘要: 为了延缓氟乐灵降解速率，延长其持效期，以正硅酸乙酯（TEOS）为二氧化硅源，以吐温-60为表面活性剂，采用乳液法将氟乐灵包裹在二氧化硅中，制备了氟乐灵微球，同时考察正硅酸乙酯与氟乐灵间的质量比及吐温-60质量分数对包封率及其缓释性能的影响，同时建立了温度和pH值对控释性能影响的多级释放模型。结果表明：形成的二氧化硅微球为1 μm左右的规则球形，粒径分布较窄，负载率可达50%。氟乐灵微球有效降低了氟乐灵原药的降解速率，且随着温度及pH值的升高，氟乐灵的释放速率加快。该研究不仅提高了农药稳定性，延长了其持效期，对其他农药微球的制备也有一定的借鉴作用。
- 氟乐灵 /
- 二氧化硅 /
- 微球 /
- 控释效果 /
- 释放动力学
Abstract: In order to delay the degradation and increase the pesticides lasting validity period, silica-coated trifluralin microspheres was prepared by the emulsion method. In the preparation procedure of silica microspheres, tetraethyl orthosilicate (TEOS) was employed as the silica source and tween-60 was used as the surfactant. The factors related to the loading efficiency and controlled release behavior of free silica-coated trifluralin microspheres were investigated. Multi-level release models of temperature and pH value on the controlled-release performance were established. Silica-coated trifluralin microspheres shows regular spherical, low particle size and high loading efficiecy (50%). The stability of trifluralin increased when coated in microspheres, and release rate of trifluralin increased with the increase of pH and temperature. The trifluralin microspheres has improve the stability of trifluralin in the environment and extended its efficacy period. This study can also be used as a reference for the preparation of other pesticide microspheres.
- trifluralin /
- silica /
- microspheres /
- control efficacy /
- release kinetics

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参考文献(17)

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