Study on the Inclusion Interactions of β-Cyclodextrin with Oleic Acid by Competitive Inclusion Method

Abstract:

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The grinding wheel will have a property of self-lubricating when the inclusion complexes of β-cyclodextrin (β-CD) and oleic acid are used as filler. The association constants and thermodynamic parameters of inclusion complex of β-CD and oleic acid were determined by competitive inclusion method in aqueous buffer solution (pH = 10.50, c = 0.025 mol/L) at different temperatures using phenolphthalein (PP) as a probe. Furthermore, the stoichiometric ratio of the complex was derived by equimolar series method. The results showed that the stoichiometric ratio of the complex was about 1:1 and the thermodynamic parameters of ΔG, ΔH and ΔS were all negative, which indicated that the formation of the inclusion complex was spontaneous, exothermic and enthalpy-driven. Thermogravimetric analysis revealed that the complex began to have a weight loss at 300°C and could withstand the hardening temperature of resin bond grinding wheel.

Info:

Periodical:

Edited by:

Han Zhao

Pages:

847-851

DOI:

10.4028/www.scientific.net/AMM.130-134.847

Citation:

X. F. Xu et al., "Study on the Inclusion Interactions of β-Cyclodextrin with Oleic Acid by Competitive Inclusion Method", Applied Mechanics and Materials, Vols. 130-134, pp. 847-851, 2012

Online since:

October 2011

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$35.00

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