Effect of coagulation bath and bore liquid composition on structure and permeation performance of polyacrylonitrile hollow fibre membranes

Polyacrylonitrile (PAN) hollow fiber membranes which were at the same time polymeric and asymmetric were manufactured through the dry-jet wet spinning process. Water with different amount of glycerin was used as the bore liquid and coagulation bath. The effects of the glycerin concentration on the hollow fiber permeation performance were investigated. We then utilized a field emission scanning electron microscopy (FESEM) to analyze the cross-section we finally gained through the offer mention process. Direct dye was used to measure the retention. The results proved that permeation is increased by adding glycerin to external and internal coagulation bath. In addition, hollow fibers spun in lower glycerin value would indicate lower hydraulic permeability and higher retention

Keywords:

glycerin in coagulation bath composition , Polyacrylonitrile , Hollow fibre membrane , Permeability , Retention