Acemannan Gels and Aerogels

Polymers

DanielAlonso Miramon-Ortíz¹  Waldo Argüelles-Monal¹  YolandaLeticia López-Franco¹  Jaime Lizardi-Mendoza¹  Elizabeth Carvajal-Millan¹  FranciscoM. Goycoolea² 

[1] Centro de Investigación en Alimentación y Desarrollo A.C., Biopolímeros-CTAOA, Hermosillo 83304, Mexico;School of Food Science and Nutrition, University of Leeds, Leeds LS2 9JT, UK;

关键词: acemannan;    gelation;    aerogel;    self-assembly;    biological materials;   

DOI  :  10.3390/polym11020330

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown