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以三嵌段共聚物F127(分子式为(EO)_(106)(PO)_(70)(EO)_(106))为模板剂,正硅酸乙酯为硅源,水热合成法制备介孔二氧化硅SBA-16,采用浸渍法将毒死蜱负载于SBA-16制得毒死蜱/SBA-16载药微球,通过FT-IR、XRD、氮气吸附-脱附、TG、DSC等手段对样品进行了表征,并探究了负载毒死蜱前后SBA-16的结构及其载药量。研究结果表明,毒死蜱以非结晶态均匀负载于SBA-16孔道中;SBA-16和毒死蜱/SBA-16载药微球的N2吸附-脱附等温线仍为H1型滞后环的Ⅵ型,且具有良好的有序介孔结构;该载药微球中负载毒死蜱的质量分数为7.6%。
The triblock copolymer F127 (molecular formula (EO) _ (106) (PO) _ (70) (EO) _ (106)) was used as a template and tetraethylorthosilicate The mesoporous silica SBA-16 was loaded on chlorpyrifos / SBA-16 microspheres by the impregnation method and the chlorpyrifos loaded on SBA-16 was characterized by FT-IR, XRD, N2 adsorption-desorption, TG and DSC The samples were characterized and the structure and drug loading of SBA-16 before and after loading chlorpyrifos were investigated. The results showed that the chlorpyrifos was evenly loaded in the SBA-16 channel in a non-crystalline state. The N2 adsorption-desorption isotherms of SBA-16 and chlorpyrifos / SBA-16 microspheres were still type Ⅵ of the H1 type hysteresis loops Has a good ordered mesoporous structure; the drug-loaded microspheres loaded with chlorpyrifos mass fraction of 7.6%.