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Acemannan Gels and Aerogels

1
Centro de Investigación en Alimentación y Desarrollo A.C., Biopolímeros-CTAOA, Hermosillo 83304, Mexico
2
School of Food Science and Nutrition, University of Leeds, Leeds LS2 9JT, UK
*
Author to whom correspondence should be addressed.
Polymers 2019, 11(2), 330; https://doi.org/10.3390/polym11020330
Received: 17 January 2019 / Revised: 7 February 2019 / Accepted: 12 February 2019 / Published: 14 February 2019
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Abstract

The procedures to obtain two types of acemannan (AC) physical gels and their respective aerogels are reported. The gelation was induced by the diffusion of an alkali or a non-solvent, then supercritical CO2 drying technology was used to remove the solvent out and generate the AC aerogels. Fourier-transform infrared spectroscopic analysis indicated that alkali diffusion produced extensive AC deacetylation. Conversely, the non-solvent treatment did not affect the chemical structure of AC. Both types of gels showed syneresis and the drying process induced further volume reduction. Both aerogels were mesoporous nanostructured materials with pore sizes up to 6.4 nm and specific surface areas over 370 m2/g. The AC physical gels and aerogels enable numerous possibilities of applications, joining the unique features of these materials with the functional and bioactive properties of the AC. View Full-Text
Keywords: acemannan; gelation; aerogel; self-assembly; biological materials acemannan; gelation; aerogel; self-assembly; biological materials
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Miramon-Ortíz, D.A.; Argüelles-Monal, W.; Carvajal-Millan, E.; López-Franco, Y.L.; Goycoolea, F.M.; Lizardi-Mendoza, J. Acemannan Gels and Aerogels. Polymers 2019, 11, 330.

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