Abstract
AbstractDevelopment of descriptive models for thermally-driven gelation process for methyl cellulose (MC) solutions is presented in this paper. The available heat absorption profiles obtained using a micro-differential scanning calorimeter (μDSC) during the gelation of MC (SM4000) aqueous solutions with various concentrations were examined. Different mathematical models were considered for fitting the experimental data. Necessary constants for the proposed mathematical formulations were obtained based on the DSC measurements to achieve the most promising fit. Further, analysis based on the mathematical models was performed to describe influence of various parameters for the gelation process, including the total heat, the degree, and the state of gelation. The effect of variations in MC concentrations on these parameters was investigated and the possible mechanisms were highlighted. Proposition was made towards the existence of a water entrapment point on the degree of gelation plots of MC hydrogels and its significance was discussed.
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