Impact of hydrophobic pendant phenyl groups on transport and co-transport of methanol and acetate in PEGDA-SPMAK cation exchange membranes

Kim, Jung Min; Lin, Yi-hung; Aravindhan, Pravin Parasakthi; Beckingham, Bryan S.

doi:10.1016/j.cherd.2022.07.017

Cited by 4 publications

(3 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The ability to spray this solution in ambient humidity is ostensibly enabled by the hydrophobic nature of the phenyl and methyl functional groups of the PS and MEK, respectively. 50,51 The nozzle and extractor ring distances and voltages were 4 and 5 cm, and 6 and 4 kV, respectively.…”

Section: Methodsmentioning

confidence: 99%

Viscoelastic properties of electrospray-deposited polymer shells via quartz crystal microbalance with dissipation (QCM-D)

Green-Warren,

McAllister,

Pasupathy

et al. 2024

Preprint

View full text Add to dashboard Cite

Viscoelastic properties of polymer nanoshell coatings fabricated by electrospray deposition (ESD), on gold-coated quartz crystals and spin-coated polystyrene (PS) surfaces, were evaluated using Quartz Crystal Microbalance with Dissipation (QCM-D). For PS particles on gold, as ESD flow rate increases from 0.5 to 1.5 mL/h, film thickness increases from ~200 to 400 nm, while dissipation increases by an order of magnitude. This is attributed to larger particle sizes resulting from shorter droplet flight times during ESD. Absence of this effect on spin-coated PS films suggest complex interfacial interactions between ESD PS shells and spin-coated PS films. Shear moduli for ESD coatings on gold are found to be virtually independent of flowrate (i.e. particle size) and are consistent with literature on expanded polystyrene foams. While the QCM-D modulus of the spray coated film is only 0.08-0.20% of the bulk PS modulus, the stiffness ratio of spray coated PS to a single shell is 5.00 - 13.3 x 103 m-1, due the more rigid response arising from shell-shell and shell-substrate interactions. These results underscore QCM-D, with nanograms of material, has the potential to predict the mechanical properties of particulate viscoelastic films suitable for high surface area sensor applications such as size-selective membranes relevant to protein or electrolyte adsorption.

show abstract

Section: Methodsmentioning

confidence: 99%

Viscoelastic properties of electrospray-deposited polymer shells via quartz crystal microbalance with dissipation (QCM-D)

Green-Warren,

McAllister,

Pasupathy

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…While the general structure of Nafion ® is known, the complex morphology of the polymer makes it difficult to develop structure–property relationships, which are needed to guide the development of new membranes [ 22 , 23 ]. Previous work has demonstrated the use of readily tunable (meth)acrylate gels as a platform to understand structure–property relationships in ion exchange membranes [ 24 , 25 , 26 ], with some gels demonstrating improved performance compared to commercial membranes [ 27 ]. Based on these reports, we decided to adopt this tunable chemistry to study the impact of network structure on the transport of ammonium to guide the development of new membranes for NRR cells.…”

Section: Introductionmentioning

confidence: 99%

Development of Structure–Property Relationships for Ammonium Transport through Charged Organogels

Bachmann,

Hunter,

Beckingham

2024

Membranes

Self Cite

View full text Add to dashboard Cite

Ammonia is a promising carbon-free fuel, but current methods to produce ammonia are energy intensive. New methods are thereby needed, with one promising method being electrochemical nitrogen reduction cells. Efficient cell operation requires robust catalysts but also efficient membrane separators that permit the selective transport of ions while minimizing the transport of the products across the cell. Commercial membranes have an unknown morphology which makes designing improved cells challenging. To address this problem, we synthesized a series of membranes with controlled crosslinking density and chemical composition to understand their impact on ammonium transport. Higher crosslinking density led to lower ammonium permeability. At the highest crosslinking density, similar ammonium permeability was observed independent of the water volume fraction and hydrophobicity of the monomers. These results suggest new directions to develop membranes with reduced ammonium crossover to improve the efficiency of these electrochemical cells.

show abstract

“…Cross-linked polymer-based IEMs are one promising alternative to linear polymer-based IEMs (cross-linked sulfonated polysulfone), as cross-links within the polymer network support the structural stability of the films and limit their swelling. , However, several cross-linked films (e.g., cross-linked PEGDA-based IEMs ,− ) tend to have low toughness, which has limited their application. Recently, we developed a series of phenyl-based cross-linked IEMs by employing phenyl acrylate (PA) and phenyl methacrylate.…”

Section: Introductionmentioning

confidence: 99%

Improved Structural Stability of Charged Hydrogels under Organic CO₂ Reduction Products: Effect of Acrylate and Methacrylate Backbone Linkages

et al. 2023

Self Cite

View full text Add to dashboard Cite

Understanding the mixed solute transport behavior of CO 2 reduction products (methanol and formate) in ion exchange membranes (IEMs) is of interest for CO 2 reduction cells (CO 2 RCs). The role of an IEM in a typical CO 2 RC is to suppress the crossover of all CO 2 reduction products while allowing the transport of electrolytes. Tuning the polymer rigidity of the membrane is a key contributor to such highly controlled transport of organic solutes in a dense hydrated membrane. Here, we investigate the mixed solute transport behavior of methanol and formate in a series of tough phenyl acrylate-based cross-linked IEMs. We then investigate the effects of a structural modification on mixed solute transport behavior by introducing quaternary carbons within the membrane. We measured the relative permittivity properties of swollen films to determine if the water hydrogen bonding environment within the IEMs, which is related to maintaining selective ion transport within the membrane (electrolytes over CO 2 reduction products), was impacted by various organic solutes. We observed films with methacrylate backbone linkages have effectively constant relative permittivities when exposed to solutions containing methanol, formate, and a mix thereof. These findings may assist in designing membranes for applications, including CO 2 reduction cells and water−organic separation.

show abstract

Impact of hydrophobic pendant phenyl groups on transport and co-transport of methanol and acetate in PEGDA-SPMAK cation exchange membranes

Cited by 4 publications

References 51 publications

Viscoelastic properties of electrospray-deposited polymer shells via quartz crystal microbalance with dissipation (QCM-D)

Viscoelastic properties of electrospray-deposited polymer shells via quartz crystal microbalance with dissipation (QCM-D)

Development of Structure–Property Relationships for Ammonium Transport through Charged Organogels

Improved Structural Stability of Charged Hydrogels under Organic CO₂ Reduction Products: Effect of Acrylate and Methacrylate Backbone Linkages

Contact Info

Product

Resources

About

Impact of hydrophobic pendant phenyl groups on transport and co-transport of methanol and acetate in PEGDA-SPMAK cation exchange membranes

Cited by 4 publications

References 51 publications

Viscoelastic properties of electrospray-deposited polymer shells via quartz crystal microbalance with dissipation (QCM-D)

Viscoelastic properties of electrospray-deposited polymer shells via quartz crystal microbalance with dissipation (QCM-D)

Development of Structure–Property Relationships for Ammonium Transport through Charged Organogels

Improved Structural Stability of Charged Hydrogels under Organic CO2 Reduction Products: Effect of Acrylate and Methacrylate Backbone Linkages

Contact Info

Product

Resources

About

Improved Structural Stability of Charged Hydrogels under Organic CO₂ Reduction Products: Effect of Acrylate and Methacrylate Backbone Linkages