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In-situ acidification of electrosterically dispersed alumina suspensions: effect of coagulant structure
journal contribution
posted on 2007-01-22, 12:02 authored by J.G.P. Binner, A.M. McDermottThe effect of the acidification arising from the hydrolysis of a range of carboxylic acid derivative compounds on the behaviour of electrosterically dispersed alumina slurries has been studied and it has been demonstrated that they can be successfully coagulated in a time-dependent manner. The inherent coagulation rate is determined by a number of factors, including the precise molecular composition and conformation of the coagulant, as well as its concentration and the suspension temperature. For the cyclic compounds, the size of the ring exhibits a significant influence on the coagulation rate with factors that affect the ground and transition state energies responsible for the observed trends. The nature of the atom bonded to the carbonyl carbon also influences the coagulation rate, with substituent hydroxyl groups accelerating the process. These side group entities can adopt a range of spatial arrangements, however certain conformations result in the formation of hydrogen bonds with the attacking water nucleophile. These favourable interactions stabilise the transition state and hence reduce the activation energy.
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Materials
Pages
396369 bytesCitation
BINNER and McDERMOTT, 2006. In-situ acidification of electrosterically dispersed alumina suspensions: effect of coagulant structure. Journal of Materials Science, 41, pp 1893-1903.Publisher
© SpringerPublication date
2006Notes
This is Restricted Access. This article was published in the journal, Journal of Materials Science [© Springer] and is available at: www.springerlink.com.ISSN
0022-2461Language
- en