Journal article

Emulsifying properties of ruptured microalgae cells: Barriers to lipid extraction or promising biosurfactants?

Sam QK Law, Srinivas Mettu, Muthupandian Ashokkumar, Peter J Scales, Gregory JO Martin

COLLOIDS AND SURFACES B-BIOINTERFACES | ELSEVIER SCIENCE BV | Published : 2018

Abstract

A systematic investigation of the emulsifying properties of ruptured algae cells was performed for the first time. The slurry of ruptured algae cells was separated into different biomass fractions, namely the cell debris, the delipidated debris, the serum, and the lipid. The interfacial interactions of these biomass fractions with a nonpolar solvent (e.g. hexane or hexadecane) were characterized using pendant drop tensiometry and interfacial shear rheology. The stability of the different emulsions (formed by the different biomass fractions) was tested using analytical centrifugation. The extracted lipid was an excellent surfactant that reduced the interfacial tension, however, it was not eff..

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Grants

Awarded by Australian Research Council


Funding Acknowledgements

The authors would like to thank Dr. David R. A. Hill for his contribution in culturing and harvesting the microalgae. The authors would also like to specially thank Lukas Boni from the Food Process Engineering Group at ETH Zurich, Switzerland; Professor Ray Dagastine and Matthew Dominic Biviano from the University of Melbourne for their support and helpful discussions. Funding was provided by Australian Research Council through Discovery Project (DP170103791).