CAJ | 학술논문

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。
위증강불악령적광은정성，제고기유효이용솔，이각취당（ CS）화갑기병희산갑지（ MMA）위벽재，채용원위취합법제비료불악령미낭，병측정료기외관형태、립경급기분포、포봉솔화재약량，동시연구료기석방특성급기재토양화수중적광은정성。결과표명：소제비적불악령미낭정규칙구형；립경재3～10μm지간，평균립경위6.5μm；포봉솔화재약량분별위79％화45％；해미낭구유량호적완석성능，석방이Fick확산위주；여불악령유유상비，불악령미낭적광은정성현저증강，재시험조건하，기재토양표면화수중적광해반쇠기분별위22 d화173 min。
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. 5μm. 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.