National Repository of Grey Literature 8 records found  Search took 0.00 seconds. 
Vliv obsahu iontových kapalin na vlastnosti neporézních polymerních membrán
Kohoutová, Marie ; Sikora, Antonín ; Hovorka, Š. ; Randová, A. ; Schauer, Jan ; Izák, Pavel
The polydimethylsiloxane membranes containing 0, 10, 20 or 30 wt. % of ionic liquid (benzyl-3-butylimidazolium tetrafluoroborate) were used for separation of butan-1-ol from water. Pervaporation selectivity increased and the butan-1-ol flux through the membrane raised with the increased content of [BBIM][BF4] in the PDMS-[BBIM][BF4] membranes. The PDMS-[BBIM][BF4] membrane showed high stability as well as selectivity (the separation factor raised up to 37, if 30 weight % of ionic liquid was accommodated in PDMS) during all experiments.
Influence of the degree of sulfonation on transport properties of membranes based on poly(2,6-dimethyl-1,4-phenylene oxide)
Moravcová, S. ; Bímová, K. ; Bouzek, K. ; Schauer, Jan
Transport properties (protonic conductivity and ion exchange kinetics) of membranes based on sulfonated poly(2,6-dimethyl-1,4-phenylene oxide) were investigated. Diffusion coefficients for protons in the membranes sulfonated to various degrees were determined using the theory of absolute mobilities of ions.
Characterization of ionically active membranes
Kůdela, Vlastimil ; Richau, K. ; Schauer, Jan
It has been shown that liquid junction potentials (LJP) are the cause of a systematic error of hydroxonium ions (protons) static transport numbers in membranes made from sulfonated poly(phenylene oxide) if LJP are calculated from concentration potentials measured by means of KCl filled electrodes. The remedy has been found in the use of wire electrodes of second kind like Ag/AgCl. Theory and results.

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