Studying On The Small Molecule Diffusion Into Hydrogels: A Fluorescence Study

In situ steady state fluorescence experiments (SSF) were reported during the diffusion of water molecules into PAAm gels at various temperatures. The fluorescence emission intensities, I_p increased continuously as water molecules diffused into gels. I_sc, scattered light intensities, from the gel was also monitored to detect the variation in the gel structure during diffusion process. Swelling and diffusion experiments were quantified by Li‐Tanaka and Fickian models.