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不同有机离子表面活性剂改性蒙脱土结构与性能比较

赵彦钊1*,张亚莉1,王兰2   

  1. (陕西科技大学1.材料科学与工程学院;2.生命科学与工程学院 西安 710021)
  • 收稿日期:2013-01-21 修回日期:2013-04-04 出版日期:2013-12-10 发布日期:2013-12-10
  • 通讯作者: 赵彦钊,教授; Tel:029-86168688; E-mail:zhaoy@sust.edu.cn; 研究方向:新材料的研究
  • 作者简介:赵彦钊(1964-),男,河南灵宝人,硕士,教授,主要从事新材料的研究。Email:zhaoy@sust.edu.cn

Structure and Property Comparison of Montmorillonites Modified with Organo-ionic Surfactants

ZHAO Yanzhao1*, ZHANG Yali1, WANG Lan2   

  1. (1.School of Materials Science & Engineering,Shaanxi University of Science & Technology,Xi′an 710021,China;
    2.College of Life Science & Engineering,Shaanxi University of Science & Technology,Xi′an 710021,China)
  • Received:2013-01-21 Revised:2013-04-04 Published:2013-12-10 Online:2013-12-10

摘要: 分别用阳离子表面活性剂十六烷基三甲基溴化铵(CTAB)、阴离子表面活性剂十二烷基磺酸钠(SDS)以及二者混合物(CTAB-SDS)的水溶液处理天然蒙脱土。 用红外光谱和X射线衍射比较了它们对蒙脱土结构的影响。 证明CTAB及CTAB-SDS处理蒙脱土的层间距分别由1.5420 nm增大至2.1946和1.8935 nm。 表明CTAB插入蒙脱土层间,且CTAB及CTAB-SDS处理蒙脱土在苯乙烯中分散性能明显提高,对有机物表现出良好的吸附性;而阴离子表面活性剂未进入蒙脱土层间,蒙脱土的结构和性能几乎未变。

关键词: 蒙脱土, 有机改性, 表面活性剂

Abstract: Organic montmorillonites(OMMT) were prepared through ion exchange method using cationic surfactant cetyl trimethyl ammonium bromide(CTAB), anionic surfactant sodium dodecyl sulfate(SDS) and their mixture(CTAB-SDS). The structures of OMMT were characterized by FT-IR and XRD. The results show that CTAB and CTAB-SDS are intercalated into the layers of montmorillonite while SDS is not. The distances between the montmorillonite layers are increased from 1.5601 nm to 2.1946 nm and 1.8935 nm when CTAB and CTAB-SDS are used respectively. The resulted OMMTs with increased layer distances have a good dispersibility in styrene and show improved adsorption toward phenol.

Key words: montmorillonite, organic modification, surfactant

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