【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.更多还原

【Abstract】 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.更多还原