Journal of South China University of Technology (Natural Science Edition) ›› 2006, Vol. 34 ›› Issue (5): 15-19,37.

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Analysis of Interlamellar Structure of Xinjiang Vermiculite Modified by Pillared Quaternary Ammonium with Diferent Chain Length

Wu PING-xiao  Li Rong  Dang Zhi   

  1. College of Environmental Science and Engineering,South China Univ.of Tech.,Guangzhou 510640,Guangdong,China
  • Received:2005-03-02 Online:2006-05-25 Published:2006-05-25
  • Contact: 吴平霄(1968-)，男，副教授，主要从事环境矿物学研究 E-mail:pppxwu@scut.edu.cn
  • About author:吴平霄(1968-)，男，副教授，主要从事环境矿物学研究
  • Supported by:

    国家自然科学基金资助项目(40573064，40202007)；广东省自然科学基金资助项目(020938，04020017)

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Abstract:

In order to investigate the reaction mechanism of organic pillared hydrobiotite,a hydrobiotite from Weili.Xinjiang,that is,a vermiculite-phlogopite interstratified mineral.was modified by cationic surfactants of quaternary ammonium with different alkyl chain length.The complexes were then tested by X-ray diffraction and infrared spec-trum.The effects of the crystallization degree,the uniformity of charge distribution.the surrounding hydration cat-ion and the pillaring mode of organic molecule on the interlamellar space of hydrobiotite were finallv discussed.The results show that the quaternary ammonium cations(C12TA+ ,C14TA+)with short alkyl chain only react with the hydration cation in the interlamerllar space of hydrobiotite,while those with long chain(C16TA+ ,C18 TA+ )first react with the hydration cation,then with the kalium cation in phlogopite interlayer.

Key words: Xinjiang vermiculite, hydrobiotite, quaternary ammonium, organic modification, interlamellar structure