Liquid-liquid phase separation during polysulfone membrane preparation

Autor:	Je Young Kim, Hwan Kwang Lee, Sung Chul Kim
Rok vydání:	2000
Předmět:	chemistry.chemical_classification Materials science Ternary numeral system Scanning electron microscope General Chemical Engineering Analytical chemistry General Chemistry Polymer Membrane chemistry Coagulation (water treatment) Vitrification Titration Phase diagram
Zdroj:	Korean Journal of Chemical Engineering. 17:564-569
ISSN:	1975-7220 0256-1115
DOI:	10.1007/bf02707167
Popis:	The cloud point curves for a ternary system of PSf/NMP/water were determined by a titration method at 15 ‡C, 30 ‡C, 45 ‡C and 60 ‡C. A small amount of water (3–10 wt% water) was needed to achieve liquid-liquid phase separation and the temperature effect was not significant. The vitrification composition for the ternary system of PSf/NMP/water was determined by DSC measurements for various compositions. Cross-sectional membrane morphologies were examined by SEM (Scanning Electron Microscope) and surface morphologies by AFM (Atomic Force Microscope) varying the parameters including polymer concentration and bath compositions. It was observed that there were two different modes of phase separation during the formation of polysulfone membrane when the coagulation conditions were varied.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::4462c5ca7a6d96bf2879b4dce7b740cb https://doi.org/10.1007/bf02707167 Zobrazit plný text záznamu Full text from SpringerLink