Freeze-dried crosslinked anionic hydrogels composed of poly(vinyl pyrrolidone) and poly(vinyl alcohol): synthesis, characterization and degradability performance.

Purpose: Poly(vinyl pyrrolidone) (PVP) and poly(vinyl alcohol) (PVA) has enticed significant research interest and are acknowledged among the principal volume of synthetic polymers that have been fabricated globally for nearly one century. This is as a result of their excellent attributes which dictated its wide-ranging usage in a range of applications, chiefly in medical field. The investigation is aimed at preparing PVP/PVA hydrogels using freeze drying technique for its characterization and accessing the biodegradability of the prepared hydrogel.