应用基础与工程科学学报
應用基礎與工程科學學報
응용기출여공정과학학보
JOURNAL OF BASIC SCIENCE AND ENGINEERING
2010年
2期
236-244
,共9页
刘鹏飞%刘西莉%曹永松%黄啟良%李健强
劉鵬飛%劉西莉%曹永鬆%黃啟良%李健彊
류붕비%류서리%조영송%황계량%리건강
悬浮种衣剂%烷基酚聚氧乙烯醚%物理稳定性%液相色谱
懸浮種衣劑%烷基酚聚氧乙烯醚%物理穩定性%液相色譜
현부충의제%완기분취양을희미%물리은정성%액상색보
flowable concentrate for seed coating%nonylphenol ether%physical stability of storage%HPLC
采用高效液相色谱仪研究了水悬浮液中烷基酚聚氧乙烯醚(Witconol NP-100)在福美双和克百威两种农药颗粒表面的吸附性能,并探讨了表面活性剂在农药颗粒表面的吸附对悬浮种衣剂(FSC)的物理稳定性的影响.结果表明Witconol NP-100吸附等温线为Langmuir型.吸附受阴离子表面活性剂Witconol D-425影响,饱和吸附量在1-30g/l浓度范围内随其浓度增加而减小,并在20℃-54℃范围内随温度上升而增加.膨润土的引入增加了Witconol NP-100的吸附,并使其达饱和吸附需用量增加.54℃热贮稳定性试验表明,Witconol NP-100用量为10g/l,达到并接近饱和吸附值时,种衣剂产品分层率最小为5%.表明表面活性剂在农药颗粒表面形成完整的吸附层是悬浮种衣剂贮藏稳定的保证.
採用高效液相色譜儀研究瞭水懸浮液中烷基酚聚氧乙烯醚(Witconol NP-100)在福美雙和剋百威兩種農藥顆粒錶麵的吸附性能,併探討瞭錶麵活性劑在農藥顆粒錶麵的吸附對懸浮種衣劑(FSC)的物理穩定性的影響.結果錶明Witconol NP-100吸附等溫線為Langmuir型.吸附受陰離子錶麵活性劑Witconol D-425影響,飽和吸附量在1-30g/l濃度範圍內隨其濃度增加而減小,併在20℃-54℃範圍內隨溫度上升而增加.膨潤土的引入增加瞭Witconol NP-100的吸附,併使其達飽和吸附需用量增加.54℃熱貯穩定性試驗錶明,Witconol NP-100用量為10g/l,達到併接近飽和吸附值時,種衣劑產品分層率最小為5%.錶明錶麵活性劑在農藥顆粒錶麵形成完整的吸附層是懸浮種衣劑貯藏穩定的保證.
채용고효액상색보의연구료수현부액중완기분취양을희미(Witconol NP-100)재복미쌍화극백위량충농약과립표면적흡부성능,병탐토료표면활성제재농약과립표면적흡부대현부충의제(FSC)적물리은정성적영향.결과표명Witconol NP-100흡부등온선위Langmuir형.흡부수음리자표면활성제Witconol D-425영향,포화흡부량재1-30g/l농도범위내수기농도증가이감소,병재20℃-54℃범위내수온도상승이증가.팽윤토적인입증가료Witconol NP-100적흡부,병사기체포화흡부수용량증가.54℃열저은정성시험표명,Witconol NP-100용량위10g/l,체도병접근포화흡부치시,충의제산품분층솔최소위5%.표명표면활성제재농약과립표면형성완정적흡부층시현부충의제저장은정적보증.
To examine the effect of surfactant adsorption on physical stability of flowable concentrates used for coating seeds (FSC) with pesticides, high performance liquid chromatography (HPLC) was used to analyze the adsorption of a surfactant (the nonylphenol ether, Witconol NP-100) on thiram and carbofuran particles. The adsorption isotherm for Witconol NP-100 on thiram and carbofuran was of the Langmuir type. Adsorption of Witconol NP-100 on pesticide particles decreased with increasing concentrations of the anionic surfactant, Morwet D-425, and increased at higher temperatures. Addition of bentonite increased the total adsorption but also increased the quantity of surfactant required. A storage experiment at temperature of 54℃ indicated that addition of 10g/l nonionic surfactant so as to obtain saturation absorbance can significantly improved FSC stability. The delamination ratio was 5% only. We infer that a stabile FSC can be obtained only when the surfactant forms an intact layer on the pesticide particles.