硒化银-聚丙烯酰胺复合微球的制备  

Synthesis of Ag_2Se-polyacrylamide composite microspheres

作　　者：梁红莲[1] 张颖[1] 吴华涛[1] 刘晓云[1] 房喻[1] 

机构地区：[1]应用表面与胶体化学教育部重点实验室；陕西师范大学化学与材料科学学院,陕西西安710062

出　　处：《陕西师范大学学报（自然科学版）》2008年第4期56-60,共5页Journal of Shaanxi Normal University：Natural Science Edition

基　　金：国家自然科学基金资助项目(2037303920543002);教育部博士点基金资助重点项目(200407188001);陕西省自然科学基金资助项目(2007E106)

摘　　要：采用反相悬浮聚合法合成了聚丙烯酰胺(PAM)高分子微凝胶,以其为模板,在室温条件下,以硝酸银(AgNO3)作为银源,硒代硫酸钠(Na2SeSO3)作为硒源,通过反胶束法制备得到了具有表面图案化结构的Ag2Se-PAM无机-有机复合微球材料,利用扫描电子显微镜(SEM)、热重分析(TGA)和X射线衍射(XRD)等手段对复合微球的形貌、无机物硒化银的含量和晶形结构等进行了表征.实验结果表明,复合微球的表面结构与硝酸银的初始浓度和表面活性剂的用量有关,随着硝酸银初始浓度的增加,复合微球表面由简单的硒化银颗粒堆积到出现图案化结构;随着表面活性剂用量的增加,复合微球表面形貌趋于粗糙.Acrylamide （AM） polymer microgels were prepared by an inverse suspension polymerization method. At room temperature, PAM microgel acting as template, Ag2Sepolyacrylamide（Ag2Se-PAM） composite microspheres with patterned surface structures were prepared by combination of a polymer microgel template method and a reverse micelle technique in presence of AgNO3 and Na2SeSO3. Scanning electron microscope （SEM）, thermogravimetric analysis （TGA） techniques and X-ray powder diffraction （XRD） were used to characterize the morphology of composite microspheres, the content, and the lattice of inorganic Ag2Se. It was demonstrated that the surface morphology of the prepared composite microspheres was influenced by the initial concentration of AgNO3 and the dosage of the used surfactant. The patterned surface structure of composite microspheres were formed with the increasing the initial concentration of AgNO3 ; It was also demonstrated that the surface structure of the composite microspheres tended to coarseness with the increasing the dosage of the used surfactant.

关 键 词：复合微球 微凝胶 反相胶束 模板法 硒化银 

分 类 号：O648.1[理学—物理化学]