| 季铵盐改性蒙脱土的微观结构与表面分形特征 |
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| 引用本文： | 郑广,高芒来,罗忠新,李晓燕.季铵盐改性蒙脱土的微观结构与表面分形特征[J].石油化工高等学校学报,2011,24(1):6-11. |
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| 作者姓名： | 郑广 高芒来 罗忠新 李晓燕 |
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| 作者单位： | 中国石油大学(北京)理学院重质油国家重点实验室,北京,102249 |
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| 基金项目： | 北京市教委共建计划项目 |
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| 摘 要： | 以两种双子季铵盐（MD,DMB）和一种单季铵盐（HTMAB）为有机改性剂,通过阳离子交换法对Na蒙脱土改性,制得季铵盐有机改性蒙脱土。采用N2吸附法、X射线衍射（XRD）及红外光谱分析（FT-IR）研究了季铵盐有机改性蒙脱土的微观结构及表面特征。结果表明,经MD,DMB及HTMAB改性后,蒙脱土BET比表面积及层间距均有所减小,这与传统长链单季铵盐的改性效果不同;有机改性后,季铵盐阳离子成功吸附于蒙脱土的层间,蒙脱土的微观结构发生了改变,形成微孔和介孔同时存在的二维交错多孔结构,表面由亲水性转变为疏水性,且改性蒙脱土分形维数D较原土有所减小,表明改性土孔隙分布更加均匀。
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| 关 键 词： | 蒙脱土 季铵盐 有机改性 微观结构 表面分形特征 |
The Microstructure and Surface Fractal Characters of Montmorillonite Modified by Quaternary Ammonium Salts |
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| ZHENG Guang,GAO Mang-lai,LUO Zhong-xin,LI Xiao-yan.The Microstructure and Surface Fractal Characters of Montmorillonite Modified by Quaternary Ammonium Salts[J].Journal of Petrochemical Universities,2011,24(1):6-11. |
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| Authors: | ZHENG Guang GAO Mang-lai LUO Zhong-xin LI Xiao-yan |
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| Affiliation: | ZHENG Guang,GAO Mang-lai*,LUO Zhong-xin,LI Xiao-yan(State Key Laboratory of Heavy Oil Processing,College of Science,China University of Petroleum,Beijing 102249,P.R.China) |
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| Abstract: | Na-montmorillonite(Na-MMT) was modified by gemini quaternary ammonium salts(MD,DMB) and mono-quaternary ammonium salt(HTMAB) through the intercalation.Changes in the surfaces and microstructure were characterized using N2 adsorption isotherms,X-ray diffraction(XRD),and fourier transform infared spectrometer(FT-IR).The results show that the BET surface area and the basal spacings of MMT are reduced when modified by MD,DMB or HTMAB,which is contrast to the MMT when modified by the monovalent quaternary ammoni... |
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| Keywords: | Montmorillonite(MMT) Quaternary ammonium salts Organic modify Microstructure Surface fractal characters |
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