Figure 1
From: Continuous Production of Macroporous Films: an Alternative to Breath Figure Assembly
Left part of the picture shows the dry-jet wet spinning method for hollow fiber production mentioning the chemical structures of the materials purged through the different orifices of the spinneret. Right part of the picture depicts the mass transfer phenomena in the hollow fiber; i Solvent and non-solvent exchange between bore fluid and the support layer solution, evaporation of the volatile solvent from the porous film forming layer and meanwhile glycerol diffusion in to the porous film forming layer. ii Solvent and non-solvent exchange between bore fluid and supporting layer solution continues, glycerol gets saturated in the solvent of the film forming solution and forms droplets which condense out afterwards. iii Porous film formed in hollow fiber geometry with support layer underneath. Since different polymers are used for preparing supporting layer solution and the porous film forming layer solution, these two layers typically delaminate from each other
