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Download StatisticsBenetti Terra Cardoso, Mariana (2020). Innovations in fragrance encapsulation using silica based Pickering emulsions. University of Birmingham. Ph.D.
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Abstract
Perfume microcapsules are essential components of laundry formulations to ensure perfume compatibility and provide a durable fragrant benefit, giving a sense of freshness to the consumer. In this context, the demand for sustainable perfume encapsulation techniques has been experiencing rapid growth as the industry investigates eco-friendly shell materials such as inorganic matrixes and biodegradable polymers as alternatives to conventional organic polymers. However, marrying the ecological demands with the technical challenges of having capsules that can retain and deliver the active ingredient in a complex formulated product is not straightforward. In this work, a novel sustainable encapsulation method based on nanoparticle-stabilized emulsions, so-called Pickering emulsions, combined with silica-based sol-gel chemistry was developed and characterized using a perfume model (hexyl salicylate). The new technology was then tested for the encapsulation of a real-world perfume oil composition used in laundry applications. The obtained fully-inorganic silica capsules demonstrated outstanding mechanical stability, good resistance against perfume leakage and promising freshness performance in a complex liquid detergent formulation. By tuning the nanoparticles surface, it was also possible to successfully encapsulate other hydrophobic and hydrophilic actives, showing that the technology is flexible and has potential as an alternative to commercial organic polymer microcapsules for several industrial applications.
| Type of Work: | Thesis (Doctorates > Ph.D.) | |||||||||
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| Award Type: | Doctorates > Ph.D. | |||||||||
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| Licence: | All rights reserved | |||||||||
| College/Faculty: | Colleges > College of Engineering & Physical Sciences | |||||||||
| School or Department: | School of Chemistry | |||||||||
| Funders: | Other | |||||||||
| Other Funders: | CNPq | |||||||||
| Subjects: | Q Science > QD Chemistry | |||||||||
| URI: | http://etheses.bham.ac.uk/id/eprint/10021 |
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- Innovations in fragrance encapsulation using silica based Pickering emulsions. (deposited 24 Jun 2025 10:38) [Currently Displayed]
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