Fig. 1
From: Thermally-drawn fibers with spatially-selective porous domains
Fiber fabrication method and cross-sections. (a) General illustration of thermal drawing process, with the associated temperature profile. The dashed line denotes the phase separation temperature for the polymer solution in the core. (b) Schematic phase diagram for a generic polymer solution. State 1 is the homogeneous state in the furnace and state 2 is the phase separated state at room temperature. (c) Illustration of a section of drawn fiber with the dense cladding surrounding the porous core. (d, e) Cross-sectional SEM images of porous fibers made of (d) polyvinylidene fluoride and (e) polycaprolactone (PCL) obtained after cladding dissolution
