Where Ws corresponds to the weight of the hydrogel after swelling for 24h and Wd corresponds to the weight of the dry, hydrogel. Reported values of swelling ratios for each dif-ferent composition were replicated three times. The xerogel discs were placed. In, distilled water and allowed to swell to equilibrium for a, minimum of 24h, Before weighting.The hydrogel samples were gently blotted with soft paper to remove excess water from the surface. Translation.
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