...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Langmuir: The ACS Journal of Surfaces and Colloids >Influence of chain lengths and loading levels on interlayer configurations of intercalated alkylammonium and their transitions in rectorite
【24h】

Influence of chain lengths and loading levels on interlayer configurations of intercalated alkylammonium and their transitions in rectorite

机译：链长和负载量对插层烷基铵层间构型及其在累托石中过渡的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

There have been extensive studies on intercalation of alkylammonium into swelling clay minerals for the purpose of surface charge determination of the clay minerals, as well as their interlayer configurations in the clay minerals. The most accepted findings are that the intercalated alkylammonium molecules adopted horizontal monolayer, bilayer, pseudotrilayer, and vertical paraffin-like configurations in the interlayer space of the swelling clay minerals depending on the chain length and loading level of the alkylammonium used. This study examined the interlayer configurations of intercalated alkyltrimethylammonium and their transition structure as a function of alkylammonium inputs and chain lengths. As the amount of alkylammonium intercalation increased, the bilayer configuration of the intercalated alkylammonium was absent during a transition from a horizontal monolayer to a pseudotrilayer intercalation. Instead, the transition structure involved a mixed layer made of rectorite intercalated with one layer and rectorite intercalated with pseudotrilayer of alkylammonium molecules. When intercalated in horizontal monolayer, the alkylammonium molecules took a random, more gauche-like arrangement. On the other hand, as alkylammonium molecules adopted a pseudotrilayer, particularly the vertical paraffin-like arrangement, a more ordered all-trans configuration was achieved. As layer charge is one of the most important properties of swelling clay minerals, commonly determined by intercalation of n-alkylammonium ions, the identification of mixed-layer transition structure in this study may suggest a need for further investigations on principles of layer charge determination of swelling clays by the alkylammonium method.
机译：为了确定粘土矿物的表面电荷及其在粘土矿物中的层间构型，已经对将烷基铵嵌入溶胀的粘土矿物中进行了广泛的研究。最普遍接受的发现是，根据所用烷基铵的链长和负载量，在溶胀粘土矿物的层间空间中，插入的烷基铵分子采用水平单层，双层，假三层和垂直石蜡样构型。这项研究检查了插入的烷基三甲基铵的层间构型及其过渡结构与烷基铵输入量和链长的关系。随着烷基铵插层量的增加，在从水平单层到拟三层插层的过渡过程中，不存在插层的烷基铵的双层构型。取而代之的是，该过渡结构涉及由累托石和一层累托石组成的混合层，累托石与一层插入，累托石与烷基铵分子的假三层插入。当插入水平单层时，烷基铵分子呈无规，更像纱状的排列。另一方面，由于烷基铵分子采用伪三层，特别是垂直的石蜡样排列，因此获得了更有序的全反式构型。由于层电荷是膨胀黏土矿物的最重要特性之一，通常是通过插入正烷基铵离子来确定的，因此本研究中对混合层过渡结构的鉴定可能意味着需要进一步研究确定层电荷的原理。通过烷基铵法使粘土膨胀。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号