Branched Polymer Materials as Proton Exchange Membranes for Fuel Cell Applications

Neelakandan, Sivasubramaniyan; Wang, Li; Zhang, Bo‐Ping; Ni, Jiangpeng; Hu, Meishao; Gao, Chunmei; Wong, Wai Yeung; Wang, Lei

doi:10.1080/15583724.2021.1964524

Cited by 42 publications

(28 citation statements)

References 110 publications

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“…[10][11][12][13] To date, the high-performance polymer polybenzimidazole (PBI), with excellent mechanical properties, and chemical and thermal stability, which can endure high temperature and strongly acidic conditions, has stood out among candidate PEM materials. 7,10,[14][15][16] PBI shows excellent performance as a HT-PEM aer being doped with phosphoric acid (PA), toward high proton conductivity of PA, with a tight interaction between the alkaline main chain of PBI and PA. To date, the proton conduction mechanism of PA-PBI has been shown to be heavily dependent on proton transfer between phosphate molecules. [17][18][19] Hence, fuel cell performance can be effectively improved by adjusting the PA uptake in the HT-PEM.…”

Section: Introductionmentioning

confidence: 99%

Constructing unique carboxylated proton transport channels via the phosphoric acid etching of a metal–organic framework in a crosslinked branched polybenzimidazole

Wang

et al. 2022

J. Mater. Chem. A

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Section: Introductionmentioning

confidence: 99%

Constructing unique carboxylated proton transport channels via the phosphoric acid etching of a metal–organic framework in a crosslinked branched polybenzimidazole

Wang

et al. 2022

J. Mater. Chem. A

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“…Construction of a continuous proton-transfer channel is considered as an effective strategy to improve the proton conductivity of HTPEMs. − The majority of studies have reported the construction of proton-transfer channels by molecular design and doping of microporous materials. , Wang , et al employed microphase separation to construct a proton-transfer channel. A variety of membranes were successfully fabricated with branch block structures PBI and achieved good proton conductivity.…”

Section: Introductionmentioning

confidence: 99%

“…16−23 The majority of studies have reported the construction of proton-transfer channels by molecular design and doping of microporous materials. 24,25 Wang 26,27 proton-transfer channel. A variety of membranes were successfully fabricated with branch block structures PBI and achieved good proton conductivity.…”

Section: Introductionmentioning

confidence: 99%

Constructing Proton Transfer Channels Using CuO Nanowires and Nanoparticles as Porogens in High-Temperature Proton Exchange Membranes

Wei

Liang

Wang

et al. 2022

ACS Appl. Energy Mater.

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Constructing proton-transfer channels is considered as an efficient method to improve the performance of cross-linked phosphoric acid (PA)-doped polybenzimidazoles’ membranes. In this study, copper(II) oxide nanowires and nanoparticles are used for the first time as porogens to construct different proton-transfer channels in a high-temperature membrane. Membranes with different porous structures are successfully prepared. The results indicate that the successful construction of continuous porous proton-transfer channel makes positive contributions to improve the performances of a membrane fuel cell. Among them, a continuous proton-transfer channel (continuous pore structure) can be constructed at a lower porogen content using nanowires (which is indicated in the change of conductivity at the ratio of 3:10). Using nanowires also can enable constructing a more effective proton-transfer channel at the same porogen content (at the ratio of 5:10) than using nanoparticles. However, the increase of porogen content is not conducive to the stability of PA retention. The KH560 cross-linked membrane (3:10W-0.01KH560) achieves excellent comprehensive performances. The results indicate that the membranes prepared using nanowires are promising for actual use in high-temperature proton exchange membrane fuel cells.

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“…In recent years, dendritic polymers with stable unimolecular architectures and a large number of peripheral end groups have been widely used. − Dendritic polymers with positively charged functional groups generally enable stronger affinity and penetration to the bacterial membrane. − As a subclass of dendritic polymers, hyperbranched polymers with monodisperse and highly branched structures generally showed a low-cost and effective synthesis process, which attracted considerable attention from researchers. ,− In this study, based on hyperbranched poly(amidoamine), a series of secondary ammonium-based hyperbranched poly(amidoamine) (SAHBP) with different long alkyl tails have been constructed. To evaluate the antimicrobial activities of SAHBPs, Escherichia coli, Staphylococcus aureus, and multidrug-resistant bacteria, Pseudomonas aeruginosa (PAO1), and methicillin-resistant S.…”

Section: Introductionmentioning

confidence: 99%

Secondary Ammonium-Based Hyperbranched Poly(amidoamine) with Excellent Membrane-Active Property for Multidrug-Resistant Bacterial Infection

Xue

Qiu

Zhao

et al. 2022

ACS Appl. Bio Mater.

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With the rapid emergence of microbial infections induced by "superbugs", public health and the global economy are threatened by the lack of effective and biocompatible antibacterial agents. Herein, we systematically design a series of secondary ammonium-based hyperbranched poly(amidoamine) (SAHBP) with different alkyl chain lengths for probing high-efficacy antibacterial agents. SAHBP modified with alkyl tails at the hyperbranched core could efficiently kill Escherichia coli and Staphylococcus aureus, two types of clinically important bacteria worldwide. The best SAHBP with 12-carbon-long alkyl tails (SAHBP-12) also showed high activity against problematic multidrug-resistant bacteria, including Pseudomonas aeruginosa and methicillin-resistant S. aureus (MRSA). Based on ζ potential, isothermal titration microcalorimetry (ITC), and membrane integrity assays, it is found that SAHBP-12 could attach to the cell membrane via electrostatic adsorption and hydrophobic interactions, following which the integrity of the bacterial cell wall and the cell membrane is disrupted, resulting in severe cell membrane damage and the leakage of cytoplasmic contents, finally causing bacterial cell death. Impressively, benefiting from excellent membrane-active property, SAHBP-12 exhibited robust therapeutic efficacy in MRSA-infected mice wounds. Moreover, SAHBP-12 also showed excellent biosafety in vitro and in vivo, which undoubtedly distinguished it as a potent weapon in combating the growing threat of problematic multidrug-resistant bacterial infections.

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Branched Polymer Materials as Proton Exchange Membranes for Fuel Cell Applications

Cited by 42 publications

References 110 publications

Constructing unique carboxylated proton transport channels via the phosphoric acid etching of a metal–organic framework in a crosslinked branched polybenzimidazole

Constructing unique carboxylated proton transport channels via the phosphoric acid etching of a metal–organic framework in a crosslinked branched polybenzimidazole

Constructing Proton Transfer Channels Using CuO Nanowires and Nanoparticles as Porogens in High-Temperature Proton Exchange Membranes

Secondary Ammonium-Based Hyperbranched Poly(amidoamine) with Excellent Membrane-Active Property for Multidrug-Resistant Bacterial Infection

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