RT Journal Article
T1 Design of aerogels, cryogels and xerogels of Alginate: effect of molecular weight, gelation conditions and drying method on particles’ micromeritics
A1 Rodríguez Dorado, Rosalía
A1 López Iglesias, Clara
A1 García González, Carlos A.
A1 Auriemma, Giulia
A1 Aquino, Rita P.
A1 Gaudio, Pasquale del
K1 Aerogel
K1 Alginate
K1 Prilling
K1 Supercritical-CO2
K1 Cryogel
AB Processing and shaping of dried gels are of interest in several fields like alginate aerogel beads used as highly porous and nanostructured particles in biomedical applications. The physicochemical properties of the alginate source, the solvent used in the gelation solution and the gel drying method are key parameters influencing the characteristics of the resulting dried gels. In this work, dried gel beads in the form of xerogels, cryogels or aerogels were prepared from alginates of different molecular weights (120 and 180 kDa) and concentrations (1.25, 1.50, 2.0 and 2.25% (w/v)) using different gelation conditions (aqueous and ethanolic CaCl2 solutions) and drying methods (supercritical drying, freeze-drying and oven drying) to obtain particles with a broad range of physicochemical and textural properties. The stability of physicochemical properties of alginate aerogels under storage conditions of 25 °C and 65% relative humidity (ICH-climatic zone II) during 1 and 3 months was studied. Results showed significant effects of the studied processing parameters on the resulting alginate dried gel properties. Stability studies showed small variations in aerogels weight and specific surface area after 3 months of storage, especially, in the case of aerogels produced with medium molecular weight alginate
PB MDPI
YR 2019
FD 2019
LK http://hdl.handle.net/10347/21219
UL http://hdl.handle.net/10347/21219
LA eng
NO Rodríguez-Dorado, R.; López-Iglesias, C.; García-González, C.A.; Auriemma, G.; Aquino, R.P.; Del Gaudio, P. Design of Aerogels, Cryogels and Xerogels of Alginate: Effect of Molecular Weight, Gelation Conditions and Drying Method on Particles’ Micromeritics. Molecules 2019, 24, 1049
NO This work was supported by Xunta de Galicia [ED431F 2016/010] & [ED431C 2016/008]; and FEDER.C.A. García-González acknowledges MINECO for a Ramón y Cajal Fellowship [RYC-2014-15239]. This work hasbeen realized in the frame of AERoGELS COST Action CA18125–Advanced Engineering and Research of aeroGelsfor Environment and Life Sciences
DS Minerva
RD 30 abr 2026