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Interlayer structure of organically modified montmorillonites: Effect of surfactant loading

机译:有机改性蒙脱土的层间结构:表面活性剂负载量的影响

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摘要

The surfactant cetyltrimethylammonium ion (CTA~+) was confined within the galleries of montmorillonite (MMT) to obtain a series of organo-montmorillonites (C16-MMTs) through an ion-exchange intercalation reaction. The C16-MMT formed a single precipitate layer when CTA~+ loading was 18.3 wt percent but stratified at high loadings. The conformational disorder increased with increasing CTA~+ loading. The upper precipitate was characterized by a larger gallery height and a higher surfactant loading in comparison with lower precipitate. The confined methylene chains adopted a lateral monolayer with a small percentage of conformation freedoms at CTA~+ loading of 18.3 wt percent. The intercalated methylene chains were arranged either in a lateral monolayer or in a tilted interdigitated bilayer at CTA~(4+) loading of 24.7 wt percent while in either a tilted interdigitated bilayer or a lateral bilayer at high CTA~+ loadings. The different arrangements of methylene chains intercalated in the MMT galleries are believed to be the reason for the stratification.
机译:将表面活性剂十六烷基三甲基铵离子(CTA〜+)限制在蒙脱石(MMT)的通道内,通过离子交换嵌入反应获得一系列有机蒙脱土(C16-MMTs)。当CTA〜+负载量为18.3 wt%,但在高负载量下分层时,C16-MMT形成单个沉淀层。构象障碍随着CTA〜+负荷的增加而增加。与较低的沉淀物相比,上部沉淀物的特征在于更大的通道高度和更高的表面活性剂负载。受限的亚甲基链采用侧向单层,其在18.3重量%的CTA +负载下构象自由度小。插入的亚甲基链以24.7 wt%的CTA〜(4+)负载布置在横向单层或倾斜的叉指双层中,而在高CTA〜+负载下布置在倾斜的叉指双层或侧面双层中。 MMT画廊中插入的亚甲基链的不同排列被认为是分层的原因。

著录项

  • 来源
    《Journal of Materials Research》 |2005年第2期|p.357-363|共7页
  • 作者

    Qiang Zheng; Bo Xu; Yihu Song;

  • 作者单位

    Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 工程材料学;
  • 关键词

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