BECAS
CRESPI Ayelen Florencia
capítulos de libros
Título:
Hydrogels and metallo-hydrogels: characterization and applications
Autor/es:
VIVIANA CAMPO DALL´ORTO; YAMILA GARRO-LINCK; AYELEN FLORENCIA CRESPI; GUILLERMO COPELLO ; JUAN MANUEL LAZARO MARTINEZ
Libro:
Microgels: Synthesis, Properties and Applications
Editorial:
Nova Science Publishers, inc.
Referencias:
Lugar: Nueva York; Año: 2017; p. 193 - 228
Resumen:
The versatility of applications makes hydrogel materials very atractive as adsorbents that can be used for decontamination of pollutants and for drug delivery. Adsorption is an efficient option for decontamination of heavy metals ions due to its high loading capacity. Nowadays some of the obtained metallo-hydrogels (Cu(II)- and Co(II)-Hydrogels) have already been shown to display catalytic activity on free radicals production from O2 and H2O2. Hydrofilic hydrogels may also respond to physiological stimuli such as pH, ionic strength and temperature for delivery of the substance in the target site. For these reason, the synthesis of novel and smart hydrogels is required in order to satisfy the demand from the pharmaceutical and environmental sectors in the last decade. In addition, exhaustive chemical and structural characterization is required in order to get the connectivity between different atoms throughout the entire polymer network and their acid-base properties. In this sense we will summarize some of the most important methods used to characterize the different aspects of these non-soluble systems. Examples of these methods include solid-state nuclear magnetic resonance (ss-NMR), infrared (IR), and Raman spectroscopies, potentiometric tritations, dynamic light scattering (DLS), and small angle scattering (SAS). We will also discuss the applicationsof these materials for the removal of heavy metals ions and organic pollutants. In the last section of these chapters, the new insights on the pharmaceutical applications of hydrogels, particularly on drug delivery, contact lenses, biosensors and stimuli-responsive systems will be highlighted.