Influence of Mg²⁺Contents on the Thixotropy of HTlc/MT Suspensions

Abstract

In this article, we found that the variation of Mg 2+ content in the Fe-Al-Mg hydrotalcite-like compounds (HTlc) and the change of R values (R defined = W HTlc /W MT ) will influence the thixotropic and viscoelastic properties of HTlc/sodium montmorillonite (MT) suspensions. With increasing the content of Mg 2+ in the HTlc samples, the storage modulus (G 0 ) and the loss modulus (G 00 ) of the HTlc/MT suspensions will increase gradually, which means the structure strength of the HTlc/MT suspension increases with increasing of Mg 2+ content in the HTlc samples. In addition, the structure strength of the suspensions will increase with increasing of R values. Special emphasis has been laid on the phenomenon of thixotropy. As the gradual increase of the structure strength in the HTlc/MT suspension, the thixotropic types will change accordingly. The mechanism has been discussed emphatically.