Abstract
Gelatin film formation was investigated in situ during evaporation of the solvent. Gelatin was dissolved in deuterium oxide (D 2O) at 50 °C followed by casting. The drying process of the gelatin–D 2O solution system was observed using a single-sided NMR scanner by application of the Carr–Purcell–Meiboom–Gill (CPMG) pulse sequence at different layer positions. The echo decays were analysed and spin–spin relaxation times ( T 2) were obtained for each layer. It was found that the drying process for the film formation occurs in a stratified fashion.
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