Effect of Ionic Strength on Swelling of Gelatin Hydrogels in Marginal Solvents
نویسندگان
چکیده
Swelling behavior of gelatin hydrogels prepared in different concentration of NaCl suspended in ethanol-water marginal solvent was studied at room temperature (20 0 C). The swelling ratio was measured by measuring the change in the mass of the gel to the original gel mass. It was found that the gel containing 0.01M NaCl shows more swelling than the normal gel without salt which infer that the salt concentration gives strength to the gels which swells more than normal gels. The laser light scattering technique was used to estimate the mesh size of swollen gel in marginal solvent and effect of ionic strengths were analyzed. It was also observed that electrostatic interaction helps in swelling (at low concentration of salt) as well as collapsing (at high concentration of salt) of gel network.
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