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|Título:||Development and characterization of hydrogels based on natural polysaccharides : policaju and chitosan|
|Autor(es):||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
|Revista:||Materials Science and Engineering C|
|Citação:||Soares, 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.|
|Resumo(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.|
|Aparece nas coleções:||CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series|
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