Polyvinyl alcohol/CuO nanocomposite hydrogels: facile synthesis and long-term stability

Filiz Boran, Çiğdem Karakaya

Öz


Within this study, Polyvinyl alcohol/CuO nanocomposite hydrogels were synthesized through dispersing CuO nanoparticles in a PVA solution, using the freeze-thawing procedure in order for physically crosslinking.  The average particle size of CuO nanoparticles which was added to the hydrogel was determined as 3.51 nm according to the XRD analysis after the ball milling process.  The presence of CuO nanoparticles in nanocomposite hydrogels was determined by UV-vis spectroscopy, FESEM, EDS, and FTIR analysis.  Also, the rheological properties of neat hydrogel and PVA/CuO nanocomposite hydrogels were examined.  The addition of CuO nanoparticles to the polymer structure develops rheological features of PVA hydrogels.  The Effect of CuO content of nanocomposite hydrogels on the swelling behavior and long term stability was investigated.  These nanocomposite hydrogels demonstrated unique properties for biomedical applications due to their high swellability at pH 2.1 as the pH values of the stomach and long term stability.  According to these results, the addition of CuO to the hydrogel structure improved the swelling characteristics of neat PVA hydrogel.


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