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Wax based emulsions for use in lipstick application

Beri, Akash (2015)
Eng.D. thesis, University of Birmingham.

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Water-in-oil emulsions have the potential to eradicate drying of the lips caused by constant lipstick application by improving moisturising properties and delivering hydrophilic molecules to the lips.

To conduct this research, a food microstructure approach was utilised developing emulsion structures’ using either a batch or continuous process and monitoring the affect these structures had on physical and material properties. The lubricating properties of emulsions structures were then compared to a trained sensory panel. Finally the release behaviour of a moisturising agent was investigated.

It was shown that the ingredients used to produce the microstructure are pivotal in indicating the melting profile, droplet size and material properties of the final structure. Specifically, when an aqueous phase is incorporated within a hard shell the elastic modulus increases as the aqueous phase become part of the wax network. The effect of lubrication showed that friction coefficient of a solid emulsion could be related to how smooth a lipstick would be perceived based on the Kokani Model. Finally, it was shown that the release of a moisturising agent is governed by the droplet size and the amount of destruction caused to the wax network.

Type of Work:Eng.D. thesis.
Supervisor(s):Norton, Ian and Cox, Philip William
School/Faculty:Colleges (2008 onwards) > College of Engineering & Physical Sciences
Department:School of Chemical Engineering
Subjects:TP Chemical technology
Institution:University of Birmingham
ID Code:5673
This unpublished thesis/dissertation is copyright of the author and/or third parties. The intellectual property rights of the author or third parties in respect of this work are as defined by The Copyright Designs and Patents Act 1988 or as modified by any successor legislation. Any use made of information contained in this thesis/dissertation must be in accordance with that legislation and must be properly acknowledged. Further distribution or reproduction in any format is prohibited without the permission of the copyright holder.
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