Proton-conducting polymer membrane based on sulfonated polystyrene microspheres and an amphiphilic polymer blend

Hong, Liang; Chen, Ningping

doi:10.1002/(sici)1099-0488(20000601)38:11<1530::aid-polb130>3.0.co;2-x

Cited by 33 publications

(12 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Some of the approaches that have been investigated are block copolymers, 2 nanofiber-based networks 3 and filled systems using particles of high ion exchange capacity (IEC). 4 Sulfonated polystyrene (SPS), either as a pure polymer or in blends, has been explored for PEM fuel cells. One limitation with using sulfonated polymeric membranes is to strike a balance between proton conductivity and dimensional stability in water at high sulfonation levels.…”

Section: Introductionmentioning

confidence: 99%

“…Crosslinked polystyrenesulfonic acid (SXLPS) particles have been used to improve the compatibility of polystyrene and PEO. 4 According to Hong et al 4 in the SPS + PEO + PS system, SXLPS particles physically cross-link with PEO and the polystyrene chains entangle in this cross-linked network formed thus inhibiting the phase separation. Yamanis et al 12 reported that Amberlyst 15, a cation-exchange resin used as a catalyst for the reaction of ethylene oxide with ethanol, lost its catalytic activity in a short period.…”

Section: Introductionmentioning

confidence: 99%

“…Hence, there has been a renewed effort to develop new PEM materials, especially composite materials that allow separation of the transport and mechanical properties. Some of the approaches that have been investigated are block copolymers, nanofiber-based networks and filled systems using particles of high ion exchange capacity (IEC) …”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Chemical Cross-Linking of Highly Sulfonated Polystyrene Electrospun Fibers

et al. 2012

View full text Add to dashboard Cite

Electrospun nanofibers of highly sulfonated polystyrene (IEC ∼ 4.8 mequiv/g) might be good candidates for use in ion exchange applications because of their ability to form continuous, highly conducting pathways for cation transport. However, such fibers suffer in terms of dimensional stability due to high water uptake at elevated humidity. To improve the stability of the electrospun nanofiber mats in water, the polyelectrolyte was coelectrospun in the presence of a high molecular weight poly(ethylene oxide) (PEO). Addition of PEO to the spinning dope helped improve the spinnability of the polyelectrolyte and subsequent heat treatment improved the stability of the fiber mats in water. Increasing PEO concentration in the fiber mats reduced the solubility of the heat-treated fiber mats in water; suggesting that the fibers were cross-linked by or in the presence of the PEO. To understand the chemistry of this apparent cross-linking reaction, the electrospun fiber mats were heated in a solid state 1H NMR rotor and changes in the spectrum were monitored as the reaction progressed. The hypothesis is that at higher temperatures, the two polymers react with each other to form sulfonic acid esters that form water-resistant cross-links. An alternative hypothesis of a free-radical cross-linking reaction was not supported by the observations.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Chemical Cross-Linking of Highly Sulfonated Polystyrene Electrospun Fibers

et al. 2012

View full text Add to dashboard Cite

show abstract

“…1c). The SSA monomer was effectively introduced as a strong negatively charged ion (−SO − ) in the polymerization step, enhancing the proton conductivity from the sulfonic acid group involved in the SSA on the plastic antibody surface [32]. The simultaneous presence of two oppositely charged monomers in the pre-polymerization mixture resulted in imprinted with cavities that contain complementary and specific functional group orientation.…”

Section: Design Of the Biosensormentioning

confidence: 99%

Detection of cardiac biomarker proteins using a disposable based on a molecularly imprinted polymer grafted onto graphite

Moreira

Sharma

Dutra³

et al. 2014

Microchim Acta

View full text Add to dashboard Cite

A low-cost disposable was developed for rapid detection of the protein biomarker myoglobin (Myo) as a model analyte. A screen printed electrode was modified with a molecularly imprinted material grafted on a graphite support and incorporated in a matrix composed of poly(vinyl chloride) and the plasticizer o-nitrophenyloctyl ether. The proteinimprinted material (PIM) was produced by growing a reticulated polymer around a protein template. This is followed by radical polymerization of 4-styrenesulfonic acid, 2-aminoethyl methacrylate hydrochloride, and ethylene glycol dimethacrylate. The polymeric layer was then covalently bound to the graphitic support, and Myo was added during the imprinting stage to act as a template. Non-imprinted control materials (CM) were also prepared by omitting the Myo template. Morphological and structural analysis of PIM and CM by FTIR, Raman, and SEM/EDC microscopies confirmed the modification of the graphite support. The analytical performance of the SPE was assessed by square wave voltammetry. The average limit of detection is 0.79 μg of Myo per mL, and the slope is −0.193±0.006 μA per decade. The SPE-CM cannot detect such low levels of Myo but gives a linear response at above 7.2 μg·mL −1 , with a slope of −0.719± 0.02 μA per decade. Interference studies with hemoglobin, bovine serum albumin, creatinine, and sodium chloride demonstrated good selectivity for Myo. The method was successfully applied to the determination of Myo urine and is conceived to be a promising tool for screening Myo in point-ofcare patients with ischemia.

show abstract

“…Recently, the study of phase separation in polymer electrolyte membranes has been emphasized to form the ionic channels and to improve the proton conductivity. A polymer blend or block copolymer is one of the important materials used to achieve phase separation with the required properties 7–11…”

Section: Introductionmentioning

confidence: 99%

Proton‐conductive membranes based on blends of polyimides

Okazaki

Nagaoka

Kawakami

2007

J Polym Sci B Polym Phys

View full text Add to dashboard Cite

We prepared novel proton-conductivity membranes based on blends of sulfonated polyimides. The blend membranes were prepared from a sulfonated homopolyimide and a sulfonated copolyimide with a solvent-casting method. The proton conductivities of the blend membranes were measured as functions of the temperature with four-point-probe electrochemical impedance spectroscopy. The conductivity of the membranes strongly depended on the sulfonated homopolyimide content and increased with an increase in the content. The proton conductivity of all the blended membranes indicated a higher value than that determined in Nafion at 80 8C, and this may mean that the proton transfer in the blend membranes is responsible for the ionic channels induced by the hydrophobic and hydrophilic domains.

show abstract

Proton-conducting polymer membrane based on sulfonated polystyrene microspheres and an amphiphilic polymer blend

Cited by 33 publications

References 7 publications

Chemical Cross-Linking of Highly Sulfonated Polystyrene Electrospun Fibers

Chemical Cross-Linking of Highly Sulfonated Polystyrene Electrospun Fibers

Detection of cardiac biomarker proteins using a disposable based on a molecularly imprinted polymer grafted onto graphite

Proton‐conductive membranes based on blends of polyimides

Contact Info

Product

Resources

About