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Acta Chimica Sinica ›› 2002, Vol. 60 ›› Issue (4): 749-752. Previous Articles     Next Articles

Original Articles

剪切速率对Fe-Al-Mg-MMH/钠质蒙脱土悬浮体触变性的影响

李淑萍;侯万国;戴肖南;胡季帆   

  1. 山东大学,济南(250100);德州学院化学系,德州(253023);山东大学物理系, 济南(250100)
  • 发布日期:2002-04-15

The Influence of Shear Rate on the Thixotropy of Ferric Aluminum Magnesium Hydroxide/Na-Montmorillonite Suspension

Li Shuping;Hou Wanguo;Dai Xiaonan;Hu Jifan$DLi Dongqing   

  1. Key Laboratory for Colloid and Interface Chemistry of Education Ministry, Shandong University,Jinan(250100);Chemistry Department, Dezhou University,Dezhou(253023);Physical Department, Shandong University,Jinan(250100)$DDepartment of Mechanical and Industrial Engineer, University of Toronto.Canada,Toronto Ontario
  • Published:2002-04-15

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In this paper, the influence of measuring conditions, the shear rate (D_L) used to measure the viscosity of the suspension, on the thixotropy of Fe-Al-Mg-mixed metal hydroxide (MMH)/Na-montmorillonite (MT) system and the pure MT suspensions was studied. It was found that the pure MT suspension and the Fe-Al-Mg-MMH/MT suspensions with MMH/MT mass ratio (R) = 0.013 displayed positive thixotropy in the studied range of D_L (10, 170, 511 and 1 022 s~(-1)), i.e. the shear rate did not influence their thixotropic type. The Fe-Al-Mg-MMH/MT suspension with R = 0.051 displayed complex thixotropy at lower D_L (10 and 170 s~(-1)) and positive thixotropy at higher D_L (511 and 1 022 s~(-1)), respectively. The Fe-Al-Mg-MMH/MT suspension with R = 0.091 displayed negative thixotropy at lower D_L (10 and 170 s~(-1)), and complex thixotropy at higher D_L (511 and 1 022 s~(-1)), respectively. The viscosity of the suspensions studied decreased gradually with the increase of D_L. Furthermore, the mechanism by which D_L influences the thixotropy of the suspension is discussed.

Key words: HYDROXIDE, MONTMORILLONITE, THIXOTROPY, SHEAR RATE, VISCOSITY

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