Intercalation of both CTMAB and Al13 into montmorillonite.
Intercalation of both CTMAB and Al13 into montmorillonite.
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DOI：
10.1016/j.jcis.2009.03.033
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发表时间：
2009-07
影响因子：
9.9
通讯作者：
Runliang Zhu;Tong Wang;Fei Ge;Wangxiang Chen;Zhimin You
中科院分区：
文献类型：
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作者：
Runliang Zhu;Tong Wang;Fei Ge;Wangxiang Chen;Zhimin You
无机-有机粘土（Inorganic-Organic Clays，IOCs）兼具有机粘土和层柱粘土（Pillared Layered Clays，PILC）的性质，近年来引起了人们极大的兴趣。以十六烷基三甲基溴化铵（CTMAB）和羟基铝（[Al_（13）O_4（OH）_（24）（H_2O）_（12）]~（7+）或Al_（13））为有机阳离子和羟基金属阳离子的代表，采用三种不同的插层方法，以不同的CTMAB/Al_（13）比例插层蒙脱土。本工作旨在为阐明IOCs的结构特征提供一些新的信息。实验结果表明，插层方法和CTMAB/Al 13的配比对插层复合物的结构有很大的影响。两种插层剂同时插层或先插层Al 13后插层均能插层到蒙脱土中，且插层材料具有大的层间距和小的比表面积。当Al 13用量较大（> 4 mmol Al/g蒙脱土）时，先插层Al 13，CTMAB的负载量会显著降低。这可能是由于预插层Al 13对蒙脱石层间的“锁定”效应，且所得IOCs的层间距值与PILC的层间距值相等。
Clays intercalated with both organic cations and hydroxy-metal cations, also known as inorganic–organic clays (IOCs), have drawn great interests in the recent years because they possess the properties of both organoclays and pillared layered clays (PILCs). In this work, cetyltrimethyl ammonium bromide (CTMAB) and hydroxy-aluminum ([Al13O4(OH)24(H2O)12]7+or Al13) were selected as the representatives of organic cations and hydroxy-metal cations, and three different methods were employed for the intercalation of montmorillonite at various CTMAB/Al13ratios. This work aims to provide some novel information for clarifying the structural characteristics of IOCs. The experimental results showed that the structures of the resulting IOCs strongly depended on the intercalation methods and CTMAB/Al13ratio. Both the intercalation agents could be intercalated into montmorillonite if they were used simultaneously for the intercalation, or if Al13was intercalated after CTMAB, and the resulting IOCs were shown to have large basal spacing and small surface areas. However, if Al13was intercalated first, the loading amounts of CTMAB would decrease significantly when the used Al13amounts were relatively large (⩾4mmol Al/g montmorillonite). This could be attributed to the “lock” effect of montmorillonite’s layers by the pre-intercalated Al13, and the basal spacing values of the resulting IOCs were shown to be equal to those of the PILCs.