Fig. 3. The FT-IR spectra of the lyophilized samples of the T-G hydrogel (a, b, c, and d corresponding to ethanol/water ratios of 1 : 1, 1 : 2, 1 : 3, and 1 : 4) (a), X-ray diffraction patterns of the lyophilized samples of the T-G hydrogel (a, b, c, and d corresponding to ethanol/water ratios of 1 : 1, 1 : 2, 1 : 3, and 1 : 4) (b), nitrogen adsorption–desorption isotherms of Gel-12 (c), and pore size distributions of Gel-12 (d).
