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Evaluation of exfoliation degree of montmorillonite in aqueous dispersions through turbidity measurement

机译：通过浊度测量评价蒙脱石在水分散体中的剥落度

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摘要

In this work, the exfoliation of montmorillonite (MMT) in aqueous suspensions was investigated through the measurement of turbidity. The experimental results have shown that the turbidity is closely correlated to the exfoliation degree of MMT in aqueous suspensions. Below the solid concentration of 2% w/v and in the range of pH 4-10, the turbidity of aqueous dispersions of MMT without exfoliation appeared constant, while it decreased on increasing the exfoliation degree of MMT. The ratio of the turbidities before and after the exfoliation ((0)/) was directly proportional to the number of fresh MMT flakes formed from the exfoliation. (0)/ was termed the exfoliation degree E. The larger the value of E, the more MMT flakes formed. It has been found that the exfoliation of MMT in aqueous dispersions was depressed due to the presence of electrolytic ions. This depression increased with the increase of ion concentration and valence.
机译：在这项工作中，通过测量浊度研究了蒙脱石（MMT）在水性悬浮液中的剥离。 实验结果表明，浊度与含水悬浮液中MMT的剥离程度密切相关。 低于2％w / v的固体浓度和pH 4-10的范围，MMT水分散体的浊度似乎恒定，同时降低了增加MMT的剥落度。 去角质（（0）/）之前和之后的浊度与由剥离形成的新鲜MMT薄片的数量成比例。 （0）/被称为剥离程度E. e的值越大，形成的MMT薄片。 已经发现由于电解离子存在，抑制了MMT在水分散体中的剥离。 这种抑郁随着离子浓度和价值的增加而增加。

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  • 来源
    《RSC Advances》 |2018年第71期|共6页
  • 作者

    Chen Tianxing; Yang Yiming; Zhao Yunliang; Rao Feng; Song Shaoxian;

  • 作者单位

    Wuhan Univ Technol Hubei Key Lab Mineral Resources Proc &

    Environm Luoshi Rd 122 Wuhan 430070 Hubei Peoples R China;

    Wuhan Univ Technol Hubei Key Lab Mineral Resources Proc &

    Environm Luoshi Rd 122 Wuhan 430070 Hubei Peoples R China;

    Wuhan Univ Technol Hubei Key Lab Mineral Resources Proc &

    Environm Luoshi Rd 122 Wuhan 430070 Hubei Peoples R China;

    Univ Michoacana Inst Invest Met &

    Mat Ciudad Univ Morelia 58030 Michoacan Mexico;

    Wuhan Univ Technol Hubei Key Lab Mineral Resources Proc &

    Environm Luoshi Rd 122 Wuhan 430070 Hubei Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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