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Scanning electron micrographs of (a) 3D printed nylon-12 mesh showing the fractured macroporous structure and 3D printed nylon-12 framework treated with (b) a TiO2 sol, (c) titanium(IV) butoxide–TEOS mix, (d) titanium(IV) butoxide, (e) TEOS, and (f) (3-aminopropyl)triethoxysilane.
