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Preparation of High-Flux Ultrafiltration Polyphenylsulfone Membranes

Authors
  • Bildyukevich, A. V.1
  • Plisko, T. V.1
  • Isaichykova, Y. A.1
  • Ovcharova, A. A.2
  • 1 Institute of Physical Organic Chemistry, National Academy of Sciences of Belarus, Minsk, 220072, Belarus , Minsk (Belarus)
  • 2 Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, Moscow, 119991, Russia , Moscow (Russia)
Type
Published Article
Journal
Petroleum Chemistry
Publisher
Pleiades Publishing
Publication Date
Aug 15, 2018
Volume
58
Issue
9
Pages
747–759
Identifiers
DOI: 10.1134/S0965544118090050
Source
Springer Nature
Keywords
License
Yellow

Abstract

AbstractPhase diagrams of the polyphenylsulfone (PPSU)–polyethylene glycol (PEG)–N-methyl-2-pyrrolidone (NMP) system have been plotted as a function of PEG molecular weight. For 15 wt % PPSU solutions containing 15 wt % of PEG with molecular weight of 6000–40 000 g mol–1, the occurrence of an upper critical solution temperature (UCST, solution–gel transfer (gel point)) and a lower critical solution temperature (LCST) was found. According to the phase diagrams analysis, a method for the preparation of high flux PPSU membranes using the systems with UCST and LCST in an experimentally attainable temperature range has been proposed. The method involves casting solution processing at a temperature of the existence of a one-phase homogeneous solution (UCST < T < LCST), and the use of a coagulation bath at a temperature between UCST (gel point) and LCST. Membranes prepared from 15 wt % PPSU solutions with the addition of PEG-20000 were found to have the highest pure water flux (500–1000 L m–2 h–1 at 0.1 MPa), and a human serum albumin rejection of ca. 90%.

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