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. Author manuscript; available in PMC: 2019 May 10.
Published in final edited form as: Polym Int. 2017 May 26;66(12):1787–1799. doi: 10.1002/pi.5407

Figure 7.

Figure 7.

(A) Instantaneous cross-linking via tetrazine-TCO ligation. (B) HA-PEG Gel interface forms when a droplet of HA-Tz contacts the solution of bis-TCO. Cross-linking occurred at the gel/liquid interface is faster than the rate of diffusion through the gel interface. Reprinted with permission from Zhang et al. 2014. 197