Performance enhancement of polybenzimidazole based high temperature proton exchange membranes with multifunctional crosslinker and highly sulfonated polyaniline

Sun, Peng; Liu, Guohong; Wang, Suwen; Yin, Xu-Cheng

doi:10.1016/j.memsci.2017.10.053

Cited by 94 publications

(68 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Agglomeration is observed for the composite membranes of SIBS 19 (low sulfonation level) and SIBS 61 with CNTs. This probably occurs due to interfacial segregation of the nanofillers and polymer matrix created by the degree of the interactions between the ionic domains of the composites (i.e., hydrogen bonding) …”

Section: Resultsmentioning

confidence: 99%

“…Crosslinking between the ionic groups of the nanofillers and the functionalized polymer could possibly explain the uniformity and good dispersion of the nanofillers in SIBS 90, which correspondingly leads to a good accession and rigorousness of membranes (Fig. ) . The carbon nanotubes should reduce the flexibility of the membranes via crosslinking but the rubbery content of SO 3 H SIBS appears to protect the crystalline domains created by the interconnections between the ionic moieties of SO 3 H SIBS.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Influence of carboxylated and phosphonated single‐walled carbon nanotubes on the transport properties of sulfonated poly(styrene‐isobutylene‐styrene) membranes

Ruiz-Colón

Pérez‐Pérez

Suleiman

2018

J. Polym. Sci. Part A: Polym. Chem.

View full text Add to dashboard Cite

This study discusses the effect of carboxylated (COOH) and phosphonated (PO3H2) single‐walled carbon nanotubes (SWCNTs) on the transport properties of sulfonated poly(styrene‐isobutylene‐styrene) (SO3H SIBS) as polymer nanocomposite membranes (PNMs) for direct methanol fuel cell (DMFC) and chemical and biological protective clothing (CBPC) applications. The properties were determined as a function of sulfonation level of SIBS, SWCNTs functionalization and loading. A comprehensive materials characterization study was performed to understand the interactions between the nanofillers and the functionalized polymer matrix, and to determine the effect of their incorporation on the resulting nanostructure of the PNMs. Results indicate that the sulfonation level is the variable that dictates nanofiller dispersion, mechanical properties, water absorption capabilities, morphology, and oxidative stability of SO3H SIBS. Meanwhile, the nanofiller loading and functionalization influenced the transport properties. The nanofillers reduced methanol permeation. PO3H2 SWCNTs increased the proton conductivity but at a high sulfonation level (i.e., 90 mol %), the ionic interconnectivity caused a more complex morphology decreasing the transport of protons. Optimal selectivity in transport properties were found with a sulfonation level of 61 mol % and a PO3H2 SWCNTs loading of 1.0 wt. % for DMFC and 0.5 wt. % for CBPC due to changes in morphology and the unique transport mechanism of permeants through the PNMs. © 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2018, 56, 2475–2495

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Influence of carboxylated and phosphonated single‐walled carbon nanotubes on the transport properties of sulfonated poly(styrene‐isobutylene‐styrene) membranes

Ruiz-Colón

Pérez‐Pérez

Suleiman

2018

J. Polym. Sci. Part A: Polym. Chem.

View full text Add to dashboard Cite

show abstract

“…Generally, high IEC is beneficial to achieving high conductivity while leads to undesired loss of dimensional stability. There are some strategies that restrict the swelling of membranes such as crosslinking [28,46,49,50] and introducing hydrophilic moieties [51,52]. Besides, the phase separated morphology could also restrict the excess absorption of water due to the well-connected hydrophobic network.…”

Section: Water Uptake and Swelling Ratiomentioning

confidence: 99%

Towards the gemini cation anion exchange membranes by nucleophilic substitution reaction

Zhang

Liang

et al. 2019

Sci. China Mater.

View full text Add to dashboard Cite

As a critical component of alkaline fuel cells, anion exchange membranes determine the energy efficiency, output power density and the long term stability. Recently, the anion exchange membranes with gemini-cation side chains exhibit superior ion conductivity due to their good nanophase separation. However, the costly and complicated synthesis limits their scaling up and commercialization. To address this problem, a convenient synthetic procedure under mild conditions is well developed. A tertiary amine precursor is introduced onto the polymer by the nucleophilic substitution reaction to avoid the conventional chloro/bromo-methylation. Followed by a simple Menshutkin reaction with 6bromo-N,N,N-trimethylhexan-1-aminium bromide, the polymer electrolytes are obtained in a high yield. The resulting anion exchange membranes with high conductivity, good fuel cell performance and restricted swelling suggest the potential for the application in fuel cell devices.

show abstract

Section: Introductionmentioning

confidence: 99%

“…Direct methanol fuel cell (DMFC) has attracted extensive attention as automotive and portable power sources because of the easily available fuel, high specific energy and low pollution level. [1][2][3][4][5] As one of the core components in DMFCs, proton exchange membrane (PEM) possesses the functions of inhibiting methanol crossover as well as providing pathways for proton transport from anode to cathode. [6][7][8][9] Nowadays, the standard perfluorosulfonic acid ionomers (such as Nafion) have been largely impeded by the serious methanol-permeability problem for application in DMFCs.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Diamine Cross‐Linker on Semi‐IPNs of BPPO/SPEEK Membranes for Direct Methanol Fuel Cell

et al. 2018

View full text Add to dashboard Cite

Low methanol permeability is one of the most critical factors for proton exchange membranes utilized in direct methanol fuel cells (DMFCs). Here, sulfonated poly(ether ether ketone) (SPEEK) polymer chains are interpenetrated into the semi‐interpenetrating polymer networks (semi‐IPNs) constructed by the alkylation reaction between bromobenzyl groups of bromomethylated poly(phenylene oxide) and amine groups of 2,2′‐(ethylenedioxy)bis(ethylamine) cross‐linker. The influences of crosslinking network contents on the key properties of SPEEK membranes are systematically investigated. Dimensional stability and methanol‐permeability resistance are enhanced as the increase of the crosslinking network contents. The relative selectivity is significantly improved due to the largely reduced methanol permeability. The DMFC assembled by the membrane with 20 wt.% crosslinking networks demonstrates four times higher power output than the Nafion 117 DMFC in 5 M methanol solution.

show abstract

Performance enhancement of polybenzimidazole based high temperature proton exchange membranes with multifunctional crosslinker and highly sulfonated polyaniline

Cited by 94 publications

References 50 publications

Influence of carboxylated and phosphonated single‐walled carbon nanotubes on the transport properties of sulfonated poly(styrene‐isobutylene‐styrene) membranes

Influence of carboxylated and phosphonated single‐walled carbon nanotubes on the transport properties of sulfonated poly(styrene‐isobutylene‐styrene) membranes

Towards the gemini cation anion exchange membranes by nucleophilic substitution reaction

Investigation of Diamine Cross‐Linker on Semi‐IPNs of BPPO/SPEEK Membranes for Direct Methanol Fuel Cell

Contact Info

Product

Resources

About