阿维菌素脲醛树脂微胶囊的制备及其缓释性能_韩志任【荐】.pdf

　2007, 9 (4 ):4 05-410 ChineseJournalofPesticideScience ·研究论文· 韩志任, 　杜有辰, 　李　刚, 　慕　卫, 　刘　峰＊ ( , 27 1018) 　:以脲醛树脂为囊壁材料,采用原位聚合法制备了阿维菌素微胶囊。探讨了甲醛-尿素摩 比 (F/U)、溶剂、分散剂、消泡剂对微胶囊形态和粒径分布的影响, 测定了阿维菌素微胶囊的释放特 性。结果表明:当甲醛-尿素摩 比为 1 75, 甲苯 ∶氯苯=3 ∶4 为溶剂,分散剂亚甲基二萘磺酸钠质 量分数为 1 5%,有机硅消泡剂 X-10 C质量分数为 0 7%时,能够制备出形态良好、平均粒径 4 07 μm、 包封率 98 89%, 贮存稳定性良好的阿维菌素微胶囊;红外图谱分析表明, 阿维菌素被包封于脲醛 树脂囊壁内;释放规律符合一级动力学方程, 阿维菌素微胶囊的 t是阿维菌素原药的 3 4 倍,说明 50 阿维菌素微胶囊具有较好的缓释性能。 :脲醛树脂;阿维菌素;微胶囊;形态;粒径分布;缓释性能 :TQ4 50 62　　　　:A　　　　:100 8-7303 (2007 )04 -0405-06 PreparationandSustained-releaseBehaviorofAbamectin Urea-formaldehydeResinMicrocapsules ＊ HANZhi-ren, 　DUYou-chen, 　LIGang, 　MUWe,i　LIUFeng (CollegeofPlantProtection, ShandongAgriculturalUniversity, Tai′an27 10 18, China) Abstrac:tMicrocapsulescontainingabamectinweresynthesizedviathein-situpolymerizationmethod usingurea-formaldehyde(UF)asawallmaterialTheparticlessizerangeandthesurfacemorphology ofthemicrocapsulewereanalyzedwithvaryingformaldehyde/urea(F/U)moleratio, solventand dispersantThesustained-releasecharacteristicsofabamectinCSwasalsostudiedTheoptmial conditionswereasfollows:TheF/Umoleratiowas1 75, tolueneandchlorobenzeneatweightratioof 3 ∶4, thedosageofdispersantNNOwas1 5%, thedosageofsiliconedefoamerX-10 Cwas0 7% The microcapsulesshowedsatisfiedsurfacemorphologyandparticlesizedistribution, withthemeanparticle diameterof4 07 μmTheproductdisplayedgoodstabilityanditsencapsulationratioswere98 89% IRspectrashowedthatabamectinwascontainedinurea-formaldehydewallTheprofilecouldbe describedbythefirstorderkineticsequation, thereleasetofAVMCSwasabout3 4 tmiesasmuch