Resumo

LONDONO, MARTA ELENA  e  JARAMILLO, JUAN MANUEL. DIELECTRIC BEHAVIOR OF POLY(VINYL ALCOHOL) HYDROGELS PREPARING BY FREEZING/THAWING TECHNIQUE. Dyna rev.fac.nac.minas [online]. 2011, vol.78, n.165, pp.132-137. ISSN 0012-7353.

poly(vinyl alcohol) hydrogels have interesting properties to be used in electronic, microelectronic, optoelectronic industry and medicine. A studio of dielectric properties permit to know their behavior, specially, their capacity how electric insulator and in this way to define their applications in the areas aforementioned. This study, presents the dielectric behavior of poly(vinyl) alcohol hydrogels obtained by freezing/thawing technique chacterized by means dielectric relaxation spectroscopy, DRS. Due to presence of water inside the hydrogel, the results show the different phenomenon that this water can gives rise to them. The dielectrical properties of the PVA hydrogels are completely depend on the percentage of water trapped within their structure.

Palavras-chave : hydrogels; poly(vinyl alcohol); dielectric relxation spectroscopy; freezing/thawing.

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