Figure 1: Thermal processing and filamentous extrusion of native SRT proteins.
From: Multi-scale thermal stability of a hard thermoplastic protein-based material
(a) Native SRT were ground with a mortar and pestle into a powder, mixed with plasticizing agents (50% SRT, 25% water and 25% glycerol by weight) and heated to 150 °C. The resulting molten STR mixture was then vacuum formed into a 1.5-mm diameter feed filament (b), and thermally extruded though a fused filament fabrication (FFF) print head attached to a robotically controlled arm to create a 300-μm diameter filament (c,d).
