以甲基三甲氧基硅烷为偶联剂,用化学接枝法对MCM- 48分子筛进行改性,制备了甲基官能化的MCM- 48分子筛.利用FT- IR、XRD、低温N2吸附/脱附等手段对产物进行结构和性能分析.实验结果表明,硅甲基取代了MCM- 48分子筛表面和孔道内羟基,成功接枝到MCM- 48表面上,膜孔径、比表面积及孔体积均减小,但MCM- 48保留原有立方有序结构.MCM- 48分子筛甲基硅烷化改性后表面疏水性提高,水热稳定性提高.
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