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本文制备了一种SBA-16介孔材料,通过分别与辛基三甲氧基硅烷(C11H26O3Si)和十八烷基三甲氧基硅烷(C21H46O3Si)产生烷基化反应进行表面改性。SBA-16及其改性材料由氮气在77K时的吸附脱附曲线、小角度X射线散射(SAXS)、红外光谱(FT-IR)、热重分析(TGA)以及材料对气态甲苯、庚烷和水的等温吸附平衡结果进行表征。SBA-16表面烷基化改性后,虽然材料的比表面积、孔容、以及对气态甲苯、庚烷和水的吸附量都变小,但是材料更疏水、更亲和于非极性的物质。
In this paper, a SBA-16 mesoporous material was prepared, which was surface modified by alkylation with octyltrimethoxysilane (C11H26O3Si) and octadecyltrimethoxysilane (C21H46O3Si) respectively. SBA-16 and its modified materials were characterized by adsorption and desorption curves of nitrogen at 77K, SAXS, FT-IR, TGA, And water adsorption isotherm equilibrium results were characterized. SBA-16 surface alkylation modified, although the material’s specific surface area, pore volume, and the adsorption of gaseous toluene, heptane and water are smaller, but the material is more hydrophobic, more affinity for non-polar substances .