NDLI: Influence of the concentration and molecular weight of polyethylene glycol on the structure and permeability of polysulfone hollow fiber membranes

Content Provider	Springer Nature Link
Author	Plisko, T. V. Bildyukevich, A. V. Usosky, V. V. Volkov, V. V.
Copyright Year	2016
Abstract	The influence of the concentration and molecular weight of polyethylene glycol (PEG, 400–40000 g mol$^{–1}$) on the phase state and viscosity of ternary polysulfone–polyethylene glycol–N,N-dimethylacetamide solutions has been studied. It was shown that an increase in PEG molecular weight (MW) results in a decrease in the region of existence of homogeneous solutions on the phase diagram due to polymer incompatibility, and in an increase in the viscosity of polymer solutions. At a constant PEG concentration (5%) the viscosity depends on PEG MW in a complicated way: in the range of PEG molecular weights 1000–6000 g mol$^{–1}$ the viscosity is nearly unchanged, but when the PEG MW exceeds 6000 g mol$^{–1}$ a sharp increase in the viscosity of the polymer solutions is observed. It was shown that changes in the membrane performance are determined by PEG concentration in the dope solution. At a PEG concentration of 5% an increase in PEG MW results in an increase in membrane performance and a decrease in the rejection capability; at an increase in PEG concentration in the dope solution up to 25% the maximum pure water flux was observed for PEG-400. The bubble point test showed that with an increase in PEG molecular weight a fraction of large pores, which can be considered as selective layer defects, increases.
Starting Page	321
Ending Page	329
Page Count	9
File Format	PDF
ISSN	09655441
Journal	Petroleum Chemistry
Volume Number	56
Issue Number	4
e-ISSN	15556239
Language	English
Publisher	Pleiades Publishing
Publisher Date	2016-06-28
Publisher Place	Moscow
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	polysulfone polyethylene glycol hollow fiber membrane permeability Industrial Chemistry/Chemical Engineering
Content Type	Text
Resource Type	Article
Subject	Chemistry Geochemistry and Petrology Fuel Technology Chemical Engineering Energy Engineering and Power Technology

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