Effect of calcium chloride weight percentage on the development of iota-carrageenan based hydrogel
Abstract
Hydrogels are three-dimensional networks of hydrophilic polymers that absorb water but are not soluble in it. In this work, calcium chloride (CaCl2) was used as a crosslinking agent to enhance the mechanical and swelling characteristics of iota-carrageenan (i-carrageenan) based hydrogels. The influence of CaCl2 weight percentage, the effect of pH, and time were all used to determine the swelling effectiveness of the hydrogel film. It was found that the hydrogel film with 9 wt.% of CaCl2 (ICC9) had the highest swelling degree with 127.89 g/g. In comparison to other hydrogel films, ICC9 was highly stable in deionized (DI) water for the longest duration (27 hours) before completely being dissolved. After all, the highest degree of swelling for all the samples occurs at pH 6.01. This showed that the presence of CaCl2 in the i-carrageenan hydrogel film enhanced stability in water.
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