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The solvency of 1,8-Cineole

Knight, Allan Ray (1997) The solvency of 1,8-Cineole. Masters by Research thesis, Murdoch University.

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Abstract

Methods of estimation of the cohesion parameters for terpenoids, particularly 1,8-cineole from eucalyptus oil, have been reviewed. Both semi-empirical and group contribution methods have been examined. The calculated values have been compared with each other and with values determined from experimental measurements, in order to assess the relative reliability of estimation methods. The information is required for formulation of natural solvent blends to replace traditional hydrocarbon and chlorinated hydrocarbon solvents. A cohesion parameter of 16.2 MPa12 is the preferred value for 1,8-cineole.

Work has been carried out to assess the degreasing ability of natural solvents, in particular 1,8-cineole and blends of this compound. This has lead to the development of a new technique for measuring solvent degreasing ability. The method, which is based on the rotating disc electrode, involves the use of an inverted “cup” filled with grease. immersed in the solvent and rotated around a vertical axis under conditions that result in approximately laminar flow of the solvent over the grease surface. The method provides a quantitative measure of degreasing ability of a solvent and also enables the degreasing endurance of a solvent to be determined. Trials indicate the method gives reliable and reproducible results.

The bioactivity of 1,8-cineole has been reviewed and the potential for 1,8-cineole to act as a solvent for pesticides was investigated. Results showed that cineole is a good solvent for the pesticides used in this investigation. The stability of oil-in-water emulsions of cineole-pesticide solutions was also studied with results indicating that with the use of suitable surfactants these emulsions have sufficient stability for agricultural purposes.

Item Type: Thesis (Masters by Research)
Murdoch Affiliation: Division of Science
Notes: Note to the author: If you would like to make your thesis openly available on Murdoch University Library's Research Repository, please contact: repository@murdoch.edu.au. Thank you.
Supervisor(s): Barton, Allan
URI: http://researchrepository.murdoch.edu.au/id/eprint/51657
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