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Citation: LI Lei, SUN Peng, DUAN Xue. Stability and Rheological Property of Mg-Al-CO₃ Dispersions[J]. Chinese Journal of Applied Chemistry, ;2001, 18(6): 436-439. shu

Stability and Rheological Property of Mg-Al-CO₃ Dispersions

1.
Key Laboratory of Science and Technology of Controllable Chemical Reactions of Education Ministery, Beijing University of Chemical Engineering, Beijing 100029

Received Date: 12 September 2000
Available Online: 25 December 2000
Fund Project: 国家自然科学基金资助课题(20076003) (20076003)

The stability and rheological property of the aqueous nanosized Mg-Al-CO₃ LDH(n(Mg)/n(Al)=3) dispersions have been studied. It is found that the stability of the dispersions containing nano Mg-Al-CO₃ LDH depends on both the solid content and the structure of the LDH and the stable aqueous LDH dispersion can be obtained without use of any dispersants. The rheological property of the aqueous LDH is in close relation with the layered structrue of the LDH. The shear-thinning of aqueous LDH dispersions is reversible and depends on the shearing time. The XRD analysis and SEM, TEM observations showed the existence of rod-shaped aggregates in the stable aqueous LDH dispersions.
- Mg-Al-CO₃,
- hydrotalcite,
- aqueous dispersion,
- layered structure,
- rheological property,
- stability
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Stability and Rheological Property of Mg-Al-CO₃ Dispersions