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2.4.4. Swelling Studies

MB Moises Bustamante-Torres
VP Victor H. Pino-Ramos
DR David Romero-Fierro
SH Sandra P. Hidalgo-Bonilla
HM Héctor Magaña
EB Emilio Bucio
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Hydrogel circles of 1 cm in diameter, previously dried, were studied to determine their water adsorption capacity. The study was performed by immersing the samples in distilled water at room temperature. The mass gain was measured gravimetrically by intervals of time from 15 min until 48 h of immersion; in each measurement, the sample was taken out from the distilled water and weighed after removing excess water with an absorbent paper. The following equation was used to calculate the swelling percentage:

where XH is the weight of the hydrogel swelled, while XI is the weight of the dry hydrogel. When the weight of the hydrogel remains constant, the maximum swelling is determined.

Copyright and License information:  ©2021 by the authors.
Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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