Park, HC Moon, YS Rhee, HW Won, J Kang, YS Kim, UY 2024-01-21T16:10:40Z 2024-01-21T16:10:40Z 2022-01-10 1999-01 0097-6156 https://pubs.kist.re.kr/handle/201004/142591 The effect of solvent exchange and the subsequent drying process on membrane morphology was investigated for microporous and integrally-skinned asymmetric membranes by using scanning electron microscopy (SEM) and atomic force microscopy (AFM). For the microporous membranes, significant changes in morphology and transport properties were observed due to the collapse of micropores in the top skin layer. In the case of integrally-skinned asymmetric membranes, only negligible differences in membrane structure were observed upon solvent exchange. The effects of solvent exchange depend strongly on the capillary forces imposed on the membrane matrix by a liquid present in the membrane pores. A membrane dried using supercritical CO2 experienced no capillary forces upon drying, and, hence, the membrane morphology observed by SEM showed the nascent, original membrane structure formed by the phase inversion process. English AMER CHEMICAL SOC ATOMIC-FORCE MICROSCOPY ULTRAFILTRATION MEMBRANES PHASE INVERSION SKIN Effect of solvent exchange on the morphology of asymmetric membranes Article 1 MEMBRANE FORMATION AND MODIFICATION, v.744, pp.110 - 124 MEMBRANE FORMATION AND MODIFICATION 744 110 124 scie scopus 000086074800008 2-s2.0-0041852873 Chemistry, Multidisciplinary Materials Science, Multidisciplinary Chemistry Materials Science Article; Proceedings Paper ATOMIC-FORCE MICROSCOPY ULTRAFILTRATION MEMBRANES PHASE INVERSION SKIN