Effect of evaporation temperature on the formation of particulate membranes from crystalline polymers by dry-cast process

Drying Induced Phase Separation

“…It is characterized by evaporation of nonsolvent and solvent from initially homogeneous single phase solution Young et al, 2002). Due to external effects homogenous polymer solution becomes thermodynamically unstable initially (Altinkaya and Ozbas, 2004) and two phase solution is formed due to evaporation.…”

“…This process avoids the complication associated with the use of coagulation baths as in wet cast process. Polymer concentration is increased to reduce the solvation character of polymer solvent as the solvent is evaporated from the solution (Young et al, 2002). Evaporation step significantly influences the final membrane morphology in dry and wet cast phase inversion process.…”

“…Phase inversion can be promoted by evaporating the casting solution by dry-casting process (Young et al, 2002). By controlling the drying conditions one can manipulate the membrane porosity, pore size, and permeability (Matsuyama et al, 2002).…”

“…We can also produce asymmetric and symmetric membranes by controlling the polymer solution phase separation (Matsuyama et al, 2000). Final structure of membrane is determined by the rate of solvent evaporation (Young et al, 2002). Membrane morphology is greatly affected by slight change in temperature.…”

Characterization of Polyamide 66 membranes prepared by phase inversion using formic acid and hydrochloric acid such as solvents

“…The choice of these conditions determines the formation of symmetric or asymmetric membranes with diverse pore structures and the characteristics of transport properties 8 . Young et al 9 , evaluated the effect of temperature on the membranes formation from polyamide 66 (PA 66) and found that slight alterations on solvent evaporation temperature also affected the morphology and crystalline structure of the membrane.…”