Fig. 4

A Rheological analysis of the MPLE gels. B Optical images of the 3D printed MPLE gel in the lattice infill structures with 2(a), 4(b) and 6(c) layers, respectively; and their strut and pore diameter of the fabricated MPLE (1:0.3) gel scaffolds (d); strut expansion rate comparing design and printed struts (e). C the 3D printed MPLE (1:0.3) gel scaffolds in lattice (a-c), rhombus (d-f) and honeycomb (g-i); and the dimensions of initial 3D model designs (a, d & g) and their optical (b, e & h) and SEM images (c, f & i). Histogram graphs comparing the thickness values of the printed struts with the initial designed values (shaded boxes) such as (D) lattice, (D) rhombus and (E) honeycomb infill structures, where inside small images were obtained by SEM