甲基官能化MCM-48分子筛的制备与表征  

Synthesis and characterization of methyl-functionalized MCM-48 molecular sieve

作　　者：廖年礁[1] 范益群[1] 

机构地区：[1]南京工业大学化学化工学院,材料化学工程国家重点实验室,南京210009

出　　处：《膜科学与技术》2012年第3期17-21,共5页Membrane Science and Technology

基　　金：国家自然科学基金资助项目(20776067)

摘　　要：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.Methyl-functionalized MCM-48 molecular sieve was prepared by grafting method using methyltrimethoxysilane as coupling agent. The prepared product was characterized by Fourier transform infrared （FT-IR）, X-ray diffraction （XRD） and nitrogen adsorption-desorption. The experiment results indicated that the silyl group was substituted for the Si--OH group on the pore surface of MCM-48, and then the modified MCM-48 molecular sieve with reduced pore diameter, surface area and pore volume was successfully acquired by silylation. However, the modified MCM-48 remained the cubic ordered mesoporous structure. The hydrothermal stability and hydrophobicity of MCM-48 molecular sieve were improved by the silylation.

关 键 词：MCM-48分子筛 甲基三甲氧基硅烷 甲基官能化 水热稳定性 

分 类 号：TQ424.25[化学工程]