Fig. 1: Chemical analysis.
From: Hybrid diacrylate resin-gelatin methacryloyl composite with bone-to-brain stiffness range
a Chemical composition of constitutive materials in resin/GelMA composite, b ATR-FTIR spectra of gelatin (Gel) before and after methacrylation (i.e., GelMA synthesis); c 1H-NMR spectra of Gel and GelMA confirm the substitution of primary amino groups by methacryloyl groups as peak signals at 5.281 and 5.518 ppm are assigned to methacrylate vinylic photons of methacrylic anhydride groups. d MALDI-TOF analysis of the liquid resin, where the inset shows zoomed view of the 2500–4000 M Z−1 band, e FTIR spectra of resin, GelMA, and resin/GelMA composites of different mixture ratios (MR), and f the trend observed between the transmission ratio and mixture ratio of the composite using C=C and C=O bands.
