Pentablock copolymer morphology dependent transport and its impact upon film swelling, proton conductivity, hydrogen fuel cell operation, vanadium flow battery function, and electroactive actuator performance

Huang, Fei; Largier, Timothy; Zheng, Wenzhong; Cornelius, Chris J.

doi:10.1016/j.memsci.2017.09.051

Cited by 28 publications

(11 citation statements)

References 35 publications

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“…[30] Due to the sulfonated blocks of NexarÔ, it has been considered for proton transport, required for a fuel cell, vanadium flow battery or ionomer actuators. [31] As for water transport, the morphology is very important for the proton transport. Although this can be controlled, the stability under oxidative conditions is also mandatory for fuel cell applications.…”

Section: Self-assembly Of Block Copolymers In Solutionmentioning

confidence: 99%

Block Copolymer Membranes

Nunes

2020

Sustainable Nanoscale Engineering

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Section: Self-assembly Of Block Copolymers In Solutionmentioning

confidence: 99%

Block Copolymer Membranes

Nunes

2020

Sustainable Nanoscale Engineering

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“…Various studies have explored solvent-templating approaches to tune the morphology of the sulfonated block copolymer [33,[47][48][49]. A particular spatial distribution of ions can be achieved by varying morphology and periodicity of the block copolymers [41,[49][50][51]. Despite the good performance of Nexar™ in various fields, questions concerning the correlation of performance with the nanostructure of the film and transport kinetics remain unanswered.…”

Section: Introductionmentioning

confidence: 99%

Highways for water molecules: Interplay between nanostructure and water vapor transport in block copolymer membranes

Akhtar

Vovushua

Villalobos

et al. 2019

Journal of Membrane Science

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Water vapor removal is a crucial process for several industries (e.g., air conditioning systems, flue gas dehydration, compressed air drying etc.). An effective dehumidification has the potential to drastically reduce the energy consumption and the overall cost of a process stream.Membranes with high water permeance and selectivity are promising candidates to achieve an energy-efficient water removal. We propose self-assembled membranes with interconnected and ordered hydrophilic domains that act as extremely fast water transport highways (water channels). We used a commercial amphiphilic pentablock copolymer (Nexar™), which has the ability to form long-range, self-ordering nanoscale morphologies with rigid end-blocks and a 2 flexible molecular network where polar and non-polar solvents regulated the final morphologies of the membranes are systematically investigated. Our results demonstrate how well-defined periodic morphology allow for molecular level control in effective removal of water vapor. The membranes with ordered hydrophilic nanochannels present a 6-fold improvement in water vapor permeability and a 14-fold increase in water vapor/N 2 selectivity compared to Nexar™ membranes with disordered domains.Molecular dynamics stimulations are carried out on the self-assembly behavior of block copolymer solution in different solvents. In addition, sorption and desorption kinetics studies for Nexar™ films were correlated to the different morphologies imaged by transmission electron, atomic force and environmental scanning electron microscopy.

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“…While there are not many commercial hydrocarbon ionomers available on the market (only NEXAR™ is known in literature 47,48 and Pemion™ was introduced in this work), a plenty of studies on hydrocarbon ionomers can be found in Fig. 3 Peak power densities of fully hydrocarbon MEAs over the last decades under the same conditions: 80 C, H 2 /O 2 , high humidity (>75% RH) and ambient pressure.…”

Section: I-v Performancementioning

confidence: 99%

“…3 Peak power densities of fully hydrocarbon MEAs over the last decades under the same conditions: 80 C, H 2 /O 2 , high humidity (>75% RH) and ambient pressure. [33][34][35][36]47 This journal is © The Royal Society of Chemistry 2021…”

Section: I-v Performancementioning

confidence: 99%