Polymeric membrane formation by wet-phase separation; turbidity and shrinkage phenomena as evidence for the elementary processes

Diffusion in Polymer Solids and Solutions

“…dd   ) , Stropnik, 2000: Region I, as demonstrated in Fig. 10, the total polymer concentration decreases along the route.…”

Effect of additives on release profile of leuprolide acetate in an in situ forming controlled‐release system: In vitro study

“…Faster coagulation causes a formation of an asymmetric structure with a dense and compact skin layer and cross sections containing channel-and finger-like structures instead of tearlike structures. 5,25 When ethyl heptanoate is added to polymer formulations both surface and cross section structures are changed as well. As it is shown in Figure 5(C), the membrane surface contains less and smaller pores than the control samples, though higher than glycerol system.…”

Enhanced gas separation performance of PSF membrane after modification to PSF/PDMS composite membrane in CO2/CH4 separation

“…To avoid the membrane shrinkage phenomena, evaporation time of 30 s was maintained before precipitation step. 23 Glass plate with casted membrane was immersed in deionized water for 24 h to complete the precipitation step. After complete precipitation, asymmetric PSF membrane was cured with a minor shrinkage in terms of membrane length.…”

“…Membrane shrinkage was very minor due to the proper evaporation time before immersion of glass plates in the nonsolvent bath. 23 Developed membrane was subjected to atmospheric drying for 12 h followed by vacuum drying at 80 8C overnight using the vacuum oven.…”