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Environmentally controlled emulsion electrospinning for the encapsulation of temperature-sensitive compounds

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Abstract

The introduction of highly volatile fragrances within polymeric nano-scaled fibers is a promising route for efficient and simple encapsulation of temperature-sensitive materials. This work describes the investigation of selected parameters influencing the electrospinning of emulsions of poly(vinyl alcohol) (PVA) and (R)-(+) limonene or hexadecane. Thereby the influence of environmental parameters such as temperature and relative humidity on the fiber structure and encapsulation efficiency (EE) of the fragrance is demonstrated. For that purpose, the electrospinning process was carried out in a climatic cabin in which temperature and relative humidity were controlled. Studied temperatures ranged from 8 to 24 °C and relative humidity varied between 55 and 85 %. The influence of temperature was dependent on the PVA concentration in the emulsion. The relative humidity influenced both the obtained fiber morphology and fragrance EE to a higher extent than the temperature due to the hydrophilic nature of the PVA. This study is of importance when considering the use of emulsion electrospinning for encapsulation purposes.

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Acknowledgements

The authors would like to thank Karl Kehl and Elisabeth Michel for their help during GC measurements and Dr Patrick Rupper for his advices concerning SEM analysis.

Conflict of interest

The authors declare no competing financial interest. This work was not financially supported.

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Authors and Affiliations

  1. Empa, Swiss Federal Laboratories for Materials Science and Technology, Lerchenfeldstrasse 5, 9014, St. Gallen, Switzerland

    Agathe Camerlo, Ana.-M. Bühlmann-Popa, René M. Rossi & Giuseppino Fortunato

  2. Department of Inorganic and Analytical Chemistry, University of Geneva – Science II, Quai Ernest Ansermet 30, 1211, Geneva 4, Switzerland

    Agathe Camerlo & Corinne Vebert-Nardin

Authors
  1. Agathe Camerlo
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  2. Ana.-M. Bühlmann-Popa
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  3. Corinne Vebert-Nardin
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  4. René M. Rossi
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  5. Giuseppino Fortunato
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Correspondence to Giuseppino Fortunato.

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Camerlo, A., Bühlmann-Popa, AM., Vebert-Nardin, C. et al. Environmentally controlled emulsion electrospinning for the encapsulation of temperature-sensitive compounds. J Mater Sci 49, 8154–8162 (2014). https://doi.org/10.1007/s10853-014-8524-5

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  • DOI: https://doi.org/10.1007/s10853-014-8524-5

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