| 硅甲基接枝改性MCM-48的结构特征及表面性质 |
| Structure and Surface Properties of Silylated MCM-48 |
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| 摘要: 本文利用三甲基氯硅烷与未焙烧MCM-48反应,实现对MCM-48的表面硅甲基接枝改性。结果表明:原未焙烧MCM-48孔道内的CTAB模板剂被脱除,三甲基氯硅烷与表面羟基反应,将硅甲基官能团接枝到MCM-48的内外表面。改性后MCM-48具有良好的长程有序结构,较窄的孔径分布,较大的孔体积和较高的比表面积,相对于未焙烧MCM-48,硅甲基接枝改性MCM-48的表面亲水性降低,亲油性得到提高。 |
| 关键词: MCM-48 表面硅甲基接枝改性 表面亲水/亲油性 |
| 基金项目: |
| Abstract: Trimethylsilyl grafted MCM-48 was prepared using TMCS (trimethylcholorosilane) and uncalcined MCM-48. The results suggest that CTAB (cetyl trimethyl ammonium bromide) can be extracted from the channels of MCM-48, and TMCS can react with hydroxyl groups on the surface of MCM-48, making the three dimensional mesopores of MCM-48 open and accessible to the polymer. Trimethylsilyl groups are anchored on the surface of MCM-48, and the resulted silylated MCM-48 material has long range ordered structure, narrow pore-size disrtribution, high surface area and large mesopore volume. Compared with calcined MCM-48, the organophilic property of silylated MCM-48 is enhanced, and its hydrophilic property is decreased. |
| Keywords: MCM-48 silylation surface organophilic/hydrophilic property |
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| 杨佳,何静,段雪,Evans D.G..硅甲基接枝改性MCM-48的结构特征及表面性质[J].无机化学学报,2002,18(9):879-886. |
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