Proton-exchange membranes composed of slightly sulfonated poly(ether ketone ketone) and highly sulfonated crosslinked polystyrene particles

Content Provider	Semantic Scholar
Author	Gasa, Jeffrey V. Boob, Stefan Weiss, Robin A. Shaw, Montgomery T.
Copyright Year	2006
Abstract	Abstract Proton-exchange membranes composed of sulfonated poly(ether ketone ketone) (SPEKK) and sulfonated crosslinked polystyrene (SXLPS) particles were made by solution casting using N -methyl pyrrolidone (NMP). The proton conductivity of SPEKK membranes with relatively low ion-exchange capacity (IEC = 0.8–1.3 meq/g) was greatly enhanced by the addition of the SXLPS particles (IEC = 5.2 meq/g). The proton conductivity exhibited a sigmoidal dependence on the SXLPS particle concentration, and values of 0.04–0.07 S/cm were achieved for SXLPS weight fractions >0.4. The equilibrium water sorptions of the composite membranes increased proportionately with increasing SXLPS concentration. However, for a comparable membrane IEC, the composite membranes absorbed considerably less water than pure SPEKK when the overall IEC exceeded 1.5 meq/g. For particle weight fractions >0.2, the dispersion of the particles was fairly uniform, but for lower concentrations, the particles settled and were concentrated on just one side of the solution-cast membrane. This asymmetric structure could have merit for some applications, and its properties are under investigation.
Starting Page	177
Ending Page	186
Page Count	10
File Format	PDF HTM / HTML
DOI	10.1016/j.memsci.2005.06.033
Alternate Webpage(s)	https://www.uakron.edu/cpspe/documents/weisspublications/gasaxlspsjmembsci2006.pdf
Alternate Webpage(s)	https://doi.org/10.1016/j.memsci.2005.06.033
Volume Number	269
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article