Page 284 - IJB-9-3

International Journal of Bioprinting 3D-printed thermosensitive hydrogel based microrobots

Figure 3. (a) 3D printing window of PNAGA-100 under different parameters. (b) Optical image of PNAGA-100 responding to the printing parameters in
panel (a). (c) The three states of PNAGA-100 with different printing conditions.

Figure 4. The FTIR spectra of PNAGA-100 synthesized by two-photon polymerization.

-NH- and the asymmetric stretching vibrations of -NH . manifests vibrations peaks at 1068 cm . There was an
−1
2
The peak at 2847 cm is assigned to vibrations of the unobvious –OH vibration band at 3361 cm rising from
−1
−1
-CH-. In addition, the strong peaks at about 1652 cm the terminal hydroxyl of PEGDA. It is hard to find the peak
−1
and 1632 cm are the vibrations of C=O and the bending of C=C, proving the completion of the polymerization
−1
vibration of -NH-, respectively. The C-O unit of PEGDA process.
Volume 9 Issue 3 (2023) 276 https://doi.org/10.18063/ijb.709