硅酸钠与有机硅氧烷前驱体自组装杂化硅基中孔材料  

Organic-Inorganic Hybrid Mesoporous Materials Assembled from Sodium Silicate and Organotrialkoxysilane

作　　者：喻宁亚[1] 巩雁军[1] 吴东[1] 孙予罕[1] 罗晴[2] 刘午阳[2] 邓风[2] 

机构地区：[1]中国科学院山西煤炭化学研究所煤转化国家重点实验室,太原030001 [2]中国科学院武汉物理与数学研究所波谱与原子分子物理国家重点实验室,武汉430071

出　　处：《物理化学学报》2004年第1期81-84,共4页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金(29973057);国家重点基础研究专项基金(2000048001);山西省青年基金(20031023)资助项目~~

摘　　要：采用有机硅氧烷(RTES)与硅酸钠(Na2SiO3)共水解缩聚合成有机官能化的MSU型硅基中孔材料.考察了合成体系pH值对材料织构性能的影响以及不同有机硅氧烷与硅酸钠在中性条件下的自组装行为.发现在中性条件下,加入NaF可以有效避免带有较小有机基团的有机硅氧烷进入材料孔壁的可能性,而且合成体系的pH值对材料的孔径有一定的调控作用.The MSU typed mesoporous organosilica with organic methyl, vinyl, and phenyl functionals were prepared by using inexpensive sodium silicate and organotrialkoxysilane as the silica precursor and nonionic polyethyleneoxide AEO9[C11 15H23 31(CH2CH2O)9H] as the structure directing agent. The resultant materials were characterized by powder X ray diffraction(XRD), N2 sorptometry, high resolution transmission electron microscopy(HRTEM) and 29Si CP MAS NMR. The results indicated that addition of sodium fluorite reduced the possibility of organotrialkoxysilane with small organic group entering the framework walls of the mesostructures at neutral condition. Moreover, pore diameter of material increased upon the increase of pH value.

关 键 词：硅酸钠 有机硅氧烷 自组装 有机-无机杂化硅基中孔材料 有机官能化 MSU型中孔分布筛 

分 类 号：TB34[一般工业技术—材料科学与工程]