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. 2020 Nov 29;12(12):2858. doi: 10.3390/polym12122858

Figure 28.

Figure 28

Schematic illustration showing micropores formation on the filaments of FFF-printed PEEK lattice scaffolds. (a) FFF printing, (b) heat treatment, and (c) sulfonation of PEEK scaffolds. Reproduced from [216] with permission of Elsevier under a Creative Commons license.