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Sulfonated fluoroblock copolymer membranes for direct methanol fuel cell applications
(2014)
This investigation studied the transport properties of several fluorinated sulfonated membranes for direct methanol fuel cell applications. First, Nafion® membranes were processed with supercritical fluid (SCF) CO2 and ...
Synthesis and characterization of Sulfonated Poly(Styrene-Isoprene-Styrene): Effects of linear vs branched morphology and counter-ion substitution
(2009)
This investigation studied the resulting nanostructure of ionic membranes composed of sulfonated copolymers with thermoplastic and elastomeric blocks. Linear poly(styrene-isoprenestyrene) (L-SIS) and branched poly(styren ...
Reverse micelles in supercritical carbon dioxide for pharmacological applications: a spectroscopic characterization
(2004)
The aim of this research is to characterize microemulsions in supercritical (sc) CO2 using two spectroscopic techniques (UV-Vis and FT-IR) and apply the microemulsion approach to extract impurities from a pharmacological ...
Transport properties of proton-exchange membranes: effect of supercritical-fluid processing and chemical functionality
(2010)
Nafion® membranes commonly used in direct methanol fuel cells (DMFC), are tipically limited by high methanol permeability (also known as the cross-over limitation). These membranes have phase segregated sulfonated ionic ...
Novel sulfonated ether based block copolymer ionomers as proton exchange membranes for fuel cells applications
(2017)
This investigation studied the morphology, hydration, and transport properties of different membranes for direct methanol fuel cell (DMFC) applications. First, sulfonated poly(ether ether ketone) (SPEEK) membranes were ...
Functionalization and characterization of Sulfonated Poly (Styrene-Isobutylene-Styrene) membranes for fuel cells and specialty separation applications
(2014)
In this study, the transport properties of poly(styrene-isobutylene-styrene) (SIBS) block copolymer were determined as a function of sulfonation level (0-94.9 %), counter ion substitution (Ba+2, Ca+2, Mg+2, Mn+2, Cu+2, ...
Thermogravimetric characterization of polystyrene-based, triblock copolymers: effects of sulfonation, counter-ion substitution, number average molecular weight, and polystyrene weight fraction
(2010)
In this study, poly (styrene-isobutylene-styrene) (SIBS) was characterized using thermogravimetric analysis. The thermal behavior of three types of SIBS, with different average number molecular weight, Mn , and polystyrene ...
Perfluorinated and sulfonated proton exchange membranes: Effect of supercritical fluid processing on ion exchange capacity and proton conductivity
(2007)
The present work has processed Nafion® and sulfonated polystyrene-isobutylenestyrene
(SIBS) with supercritical fluid (SCF) carbon dioxide at a 40°C and 200 bar with
the aid of ten co-solvents of different size and polarity. ...
Poly(styrene-isobutylene-styrene) nanocomposite membranes for fuel cell devices and specialty separation applications
(2018-05)
Ionic domains were incorporate into sulfonated poly(styrene–isobutylene–styrene)
(SO3H SIBS) in an effort to improve the transport properties of the functionalized
aromatic block copolymer. The resulting polymer nanocomposite ...
Sulfonated polymer metal nanocomposite membranes with bacterial disinfection activity in water
(2018-05)
This study describes the synthesis and characterization of sulfonated poly(styreneisobutylene-
styrene) (SIBS) polymer nanocomposite membranes, which show antibacterial
properties useful for the inactivation of Enterococci ...