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Toward longer-lasting fragrances

Date:
February 17, 2016
Source:
American Chemical Society
Summary:
Fragrances can be powerful. They can sooth or revitalize, evoke the forest or sea, and remind us of the past. To capture them, manufacturers infuse scents into products from toilet bowl cleaners to luxury perfumes. But once released from a bottle, fragrances evaporate quickly. Now researchers report a new way to encapsulate fragrance molecules to make a product's scent last.
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Fragrances can be powerful. They can sooth or revitalize, evoke the forest or sea, and remind us of the past. To capture them, manufacturers infuse scents into products from toilet bowl cleaners to luxury perfumes. But once released from a bottle, fragrances evaporate quickly. Now researchers report in the journal ACS Applied Materials & Interfaces a new way to encapsulate fragrance molecules to make a product's scent last.

The challenge with creating long-lasting fragrances is that aroma molecules tend to be small and volatile. That means they can sneak through barriers easily and disperse quickly. Some methods have been developed to prevent fragrance molecules from hastily escaping from a spritz of perfume or a dollop of lotion. For example, one process slows down the molecules by packaging them in microcapsules. But the technique is inefficient and doesn't control for shell size, thickness or structure, which makes it harder to work with. David A. Weitz and colleagues wanted to figure out a new strategy using microfluidic and bulk emulsification to encapsulate fragrances.

First, to get a homogeneous mixture of water and α-pinene molecules -- found in oils from pine trees and rosemary -- the researchers emulsified them (think blending together two ingredients like oil and vinegar that normally separate). Pumping the emulsion into tiny glass microfluidic tubes created uniform microcapsules. Testing showed that the capsules successfully slowed the release of α-pinene. In addition to its use in the fragrance industry, the researchers say the technique could have applications in drug delivery or other areas.


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Materials provided by American Chemical Society. Note: Content may be edited for style and length.


Journal Reference:

  1. Hyomin Lee, Chang-Hyung Choi, Alireza Abbaspourrad, Chris Wesner, Marco Caggioni, Taotao Zhu, David A. Weitz. Encapsulation and Enhanced Retention of Fragrance in Polymer Microcapsules. ACS Applied Materials & Interfaces, 2016; 8 (6): 4007 DOI: 10.1021/acsami.5b11351

Cite This Page:

American Chemical Society. "Toward longer-lasting fragrances." ScienceDaily. ScienceDaily, 17 February 2016. <www.sciencedaily.com/releases/2016/02/160217130705.htm>.
American Chemical Society. (2016, February 17). Toward longer-lasting fragrances. ScienceDaily. Retrieved May 23, 2017 from www.sciencedaily.com/releases/2016/02/160217130705.htm
American Chemical Society. "Toward longer-lasting fragrances." ScienceDaily. www.sciencedaily.com/releases/2016/02/160217130705.htm (accessed May 23, 2017).

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