Proton exchange membranes based on sulfonated crosslinked polystyrene micro particles dispersed in poly(dimethyl siloxane)

Brijmohan, Smita B.; Shaw, Montgomery T.

doi:10.1016/j.polymer.2006.02.024

Cited by 17 publications

(14 citation statements)

References 23 publications

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“…In blends where the dispersed phase is conductive, such a structure can have much higher conductivity than the isotropic counterpart, which would be highly desirable in the design of a PEM. Oren et al [9] and later Brijmohan et al [10] demonstrated this effect for mixtures of sulfonated cross-linked PS particles (SXLPS) dispersed in a poly(dimethylsiloxane) (PDMS) matrix. Similarly, SXLPS has been dispersed and aligned in a thermoplastic SPEKK matrix to achieve very high proton conductivities [11].…”

Section: Introductionmentioning

confidence: 98%

Structured polymer electrolyte blends based on sulfonated polyetherketoneketone (SPEKK) and a poly(ether imide) (PEI)

Gasa

Weiß

Shaw

2008

Journal of Membrane Science

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Section: Introductionmentioning

confidence: 98%

Structured polymer electrolyte blends based on sulfonated polyetherketoneketone (SPEKK) and a poly(ether imide) (PEI)

Gasa

Weiß

Shaw

2008

Journal of Membrane Science

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“…Changing the electric properties of polymeric particles can also be useful for other purposes, such as reducing the accumulation of static electricity by increasing charge transport through materials [ 30 , 31 ] or enhancing the electrorheological response [ 32 ]. Tailoring the electric properties also make the particles good candidates for material to be used, for example, in conductive particle inks [ 33 ], proton exchange membranes [ 34 ], or anisotropic conducting adhesives [ 35 ].…”

Section: Introductionmentioning

confidence: 99%

Assembly of 1D Granular Structures from Sulfonated Polystyrene Microparticles

et al. 2017

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Being able to systematically modify the electric properties of nano- and microparticles opens up new possibilities for the bottom-up fabrication of advanced materials such as the fabrication of one-dimensional (1D) colloidal and granular materials. Fabricating 1D structures from individual particles offers plenty of applications ranging from electronic sensors and photovoltaics to artificial flagella for hydrodynamic propulsion. In this work, we demonstrate the assembly of 1D structures composed of individual microparticles with modified electric properties, pulled out of a liquid environment into air. Polystyrene particles were modified by sulfonation for different reaction times and characterized by dielectric spectroscopy and dipolar force measurements. We found that by increasing the sulfonation time, the values of both electrical conductivity and dielectric constant of the particles increase, and that the relaxation frequency of particle electric polarization changes, causing the measured dielectric loss of the particles to shift towards higher frequencies. We attributed these results to water adsorbed at the surface of the particles. With sulfonated polystyrene particles exhibiting a range of electric properties, we showed how the electric properties of individual particles influence the formation of 1D structures. By tuning applied voltage and frequency, we were able to control the formation and dynamics of 1D structures, including chain bending and oscillation.

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“…As a result, during the past decade there has been a renewed effort to develop composite materials that allow one to manage the transport and mechanical properties independently. Some of the approaches that have been explored are block copolymers, , nanofiber-based networks, particle-filled systems wherein the particles have very high ion-exchange capacities (IEC) , and blends. , …”

Section: Introductionmentioning

confidence: 99%

“…In the past, cross-linked sulfonated polystyrene particles have been dispersed in polymer matrixes such as PDMS and lightly sulfonated PEKK to fabricate composite membranes. , If dispersed randomly, the concentration of the particles in the polymer matrix should be higher than the percolation threshold to achieve high conductivity. To achieve percolation at lower concentrations, the particles can be aligned in the polymer matrix using external electric or magnetic fields .…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Characterization of Conductive Nanofiber-Based Composite Membranes

Subramanian

Weiß

Shaw

2013

Ind. Eng. Chem. Res.

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Cross-linked electrospun fiber mats of highly sulfonated polystyrene were combined with a polymer matrix to fabricate nanofiber-based composite membranes and characterized. In-plane conductivity of the membrane was controlled by varying the concentration of fiber mats in polymer matrix. Unlike dispersing acidic particles in polymer matrix, the electrospun fiber mats are always percolated; hence, this morphology helps achieve high conductivities across the membrane, and the variation in conductivity with respect to fiber loading is practically linear. The cross-linked fiber mats were subjected to sonication to chop the fiber mat to short fibers that can conceivably be dispersed and aligned in a polymer matrix to achieve bulk conductivity through the membranes.

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Proton exchange membranes based on sulfonated crosslinked polystyrene micro particles dispersed in poly(dimethyl siloxane)

Cited by 17 publications

References 23 publications

Structured polymer electrolyte blends based on sulfonated polyetherketoneketone (SPEKK) and a poly(ether imide) (PEI)

Structured polymer electrolyte blends based on sulfonated polyetherketoneketone (SPEKK) and a poly(ether imide) (PEI)

Assembly of 1D Granular Structures from Sulfonated Polystyrene Microparticles

Fabrication and Characterization of Conductive Nanofiber-Based Composite Membranes

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