项目名称: 新型核-壳介孔微球的结构调控及惰性气体选择性富集机理
项目编号: No.21271031
项目类型: 面上项目
立项/批准年度: 2013
项目学科: 数理科学和化学
项目作者: 崔秀国
作者单位: 北京石油化工学院
项目金额: 84万元
中文摘要: 惰性气体及其放射性同位素的净化及快速监测要求材料具有高的比表面积及对惰性气体的选择性富集能力。本项目以聚碳酸酯溶液的乳液为模板,通过无机前驱体的溶胶-凝胶过程及在模板表面的自组装,制备以介孔二氧化硅为外壳,聚碳酸酯为内核的复合微球。大比表面积的外壳介孔材料对气体具有高的吸附速率,而对惰性气体具有超强吸附能力的聚碳酸酯则通过不断打破外壳气体的吸附-脱附平衡,导致惰性气体从外壳向内核材料进行单方向的传质过程,使微球材料对惰性气体的吸附具有高的选择性和吸附速率。
中文关键词: 核壳结构;吸附;聚碳酸酯;惰性气体;介孔微球
英文摘要: High special surface area and selection enrichment ability of materials have been demanded in the field of purification and rapid monitoring for noble gases. In this project, polycarbonate core-mesoporous silica shell composite microspheres will be prepared in the presence of the emulsion of polycarbonate solution by simultaneously proceeding of sol-gel process of inorganic precursor and their self-assembly on the surface of template. Goal materials represent high selection and adsorption rate for noble gases, which can be attributed to two reason: firstly, mesoporous shell with large special surface area provide high adsorption rate, and second, polycarbonate with remarkable adsorption ability for gases prompt noble gases a permeating along one direction from shell to core by breaking an equilibrium of adsorption and desorption.
英文关键词: core-shell structure;adsorption;polycarbonate;noble gas;mesoporous microsphere