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Molecules 2018, 23(5), 1121;

On-Demand Microwave-Assisted Fabrication of Gelatin Foams

Materials Science and Engineering Program, University of Colorado Boulder, Boulder, CO 80309, USA
Department of Civil, Environmental, and Architectural Engineering, University of Colorado Boulder, Boulder, CO 80309, USA
Author to whom correspondence should be addressed.
Academic Editor: Silvia Panzavolta
Received: 5 April 2018 / Revised: 1 May 2018 / Accepted: 2 May 2018 / Published: 9 May 2018
(This article belongs to the Special Issue Gelatin: Chemistry, Characterization, Application)
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Ultraporous gelatin foams (porosity >94%, ρ ≈ 0.039–0.056 g/cm3) have been fabricated via microwave radiation. The resulting foam structures are unique with regard to pore morphology (i.e., closed-cell) and exhibit 100% macroporosity (pore size 332 to 1700 μm), presence of an external skin, and densities similar to aerogels. Results indicate that the primary foaming mechanism is governed by the vaporization of water that is tightly bound in secondary structures (i.e., helices, β-turns, β-sheets) that are present in dehydrated gelatin films but not present in the foams after microwave radiation (700 Watts). View Full-Text
Keywords: gelatin; foam; microwave processing gelatin; foam; microwave processing

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Frazier, S.D.; Aday, A.N.; Srubar, W.V., III. On-Demand Microwave-Assisted Fabrication of Gelatin Foams. Molecules 2018, 23, 1121.

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