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TitleDevelopment and characterization of hydrogels based on natural polysaccharides : policaju and chitosan
Author(s)Soares, Paulo A. G.
Bourbon, A. I.
Vicente, A. A.
Andrade, Cesar A. S.
Barros Junior, Wilson
Correia, Maria T. S.
Pessoa Júnior, Adalberto
Cunha, Maria G. Carneiro da
Hydrogel characterization
Issue date2014
PublisherElsevier B.V.
JournalMaterials Science and Engineering C
CitationSoares, Paulo A.G.; Bourbon, A.I.; Vicente, A.A.; Andrade, Cesar A.S.; Barros Jr., Wilson; Correia, Maria T.S.; Pessoa Jr., Adalberto; Carneiro-da-Cunha, Maria G. Development and characterization of hydrogels based on natural polysaccharides: Policaju and chitosan Materials Science and Engineering: C 42() 219-226, 2014.
Abstract(s)The development of hydrogels based on natural polysaccharides was investigated by preparing mixtures of policaju/chitosan at weight ratios of 1:4 and 2:3. Utilizing dynamic light scattering (DLS) techniques for these mixtures, an increase on the hydrodynamic particle radius was observed varying their pH from 3.0 to 12.0. Furthermore, a reduction of ζ-potential was also observed for the same pH interval. Following rounds of drying/hydration cycles at a specific pH value, hydrogel matrices were formed. The pore size distribution of these formed hydrogels was examined using scanning electron microscopy. Further FT-IR analyses confirmed a physical interaction between the polysaccharides policaju and chitosan. Swelling experiments revealed water uptake values, after 24h of immersion in water, close to 270% for 1:4, and 320% for 2:3 hydrogels. Finally, rheological measurements were then conducted in order to confirm hydrogel viscoelastic features. These results indicate a promising road to biomaterials fabrication and biomedical applications. Copyright © 2014 Elsevier B.V. All rights reserved.
AccessOpen access
Appears in Collections:CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series

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