Servicios Personalizados
Revista
Articulo
Indicadores
- Citado por SciELO
- Accesos
Links relacionados
- Citado por Google
- Similares en SciELO
- Similares en Google
Compartir
Revista EIA
versión impresa ISSN 1794-1237versión On-line ISSN 2463-0950
Resumen
ECHEVERRI, Claudia Elena; VALLEJO, Catalina y LONDONO, Marta Elena. SYNTHESIS AND CHARACTERIZATION OF POLYVINYL ALCOHOL HYDROGELS BY FREEZING/THAWING TECHNIQUE FOR MEDICAL APPLICATIONS . Rev.EIA.Esc.Ing.Antioq [online]. 2009, n.12, pp.59-66. ISSN 1794-1237.
Using different cycles of freeze-thawing, semicrystalline polyvinyl alcohol hydrogels were synthesized in concentrations of 7.5 % and 12 %. The kinetic and grade of swelling, states of water and the tensile strength were calculated by gravimetry, by differential scanning calorimetry, DSC, and the tensile tests respectively. The results show that hydrogels with less concentration and cycles have better grade and kinetic of swelling, while the tensile strength is lower. The DSC results allow us to determine the free and freezable bound waters in our hydrogels. The characteristics obtained from these hydrogels lead their classification for different medical applications.
Palabras clave : polyvinyl alcohol; biomaterials; hydrogels; freezing/thawing.