Polyelectrolyte composite membranes of polybenzimidazole and crosslinked polybenzimidazole-polybenzoxazine electrospun nanofibers for proton exchange membrane fuel cells

Li, Hsieh-Yu; Liu, Ying‐Ling

doi:10.1039/c2ta00270a

Cited by 99 publications

(59 citation statements)

References 54 publications

(8 reference statements)

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“…In this work we report the first attempt to employ polybenzoimidazole (PBI) membranes in dehydration pervaporation on THF aqueous solutions. As PBI absorbs about 15 wt% water at equilibrium and is a high performance polymer, PBI-based membranes have been applied for dehydration pervaporation separations [46][47][48] and surface hydrophilically-modified with poly(styrene sulfonic acid) (PSSA) chains. As the neat PBI membrane does not show satisfied separation performance for pervaporation dehydration on THF aqueous solutions, the crosslinked and surface-modified PBI membranes has shown attractive membrane stability, permeation fluxes, and separation performance in the pervaporation dehydration on THF aqueous solutions.…”

Section: Introductionmentioning

confidence: 99%

Hydrophilically surface-modified and crosslinked polybenzimidazole membranes for pervaporation dehydration on tetrahydrofuran aqueous solutions

Han

Lai³

et al. 2015

Journal of Membrane Science

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Section: Introductionmentioning

confidence: 99%

Hydrophilically surface-modified and crosslinked polybenzimidazole membranes for pervaporation dehydration on tetrahydrofuran aqueous solutions

Han

Lai³

et al. 2015

Journal of Membrane Science

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“…In the applications of NFCPEMs, nanofibers have been widely investigated as either mechanical or stability reinforcing component or proton conductor . The morphology of nanofibrous membranes had important effects on NFCPEMs performance.…”

Section: Introductionmentioning

confidence: 99%

Modeling and optimization of sulfonated poly (ether ether ketone) nanofibrous proton exchange membranes with response surface methodology

Sadrjahani

Gharehaghaji

Javanbakht

2017

Polymer Engineering & Sci

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The morphological control of proton conductive nanofibrous mat used in proton exchange membranes (PEMs) is a key issue to improve proton conductivity of PEMs. In this study, response surface methodology (RSM) was utilized to investigate the morphological characterizations of electrospun sulfonated poly(ether ether ketone) (SPEEK) nanofibrous membranes. The effects of electrospinning parameters namely solution concentration, applied voltage and tip to collector distance were studied on the average diameter, its standard deviation and the degree of alignment of SPEEK nanofibers. The adequacy of the response surface models was verified by the validation experiments. Optimized conditions were obtained to meet the desired status of collecting more uniform and finer nanofibers with improved alignment. After obtaining the significant factors and optimal test level, an additional optimization was conducted at different take-up speeds to fabricate high-grade aligned nanofibers. The resultant nanofibers had the diameter of 107 6 22 nm at the optimum point which was in good agreement with the predicted response values. The highest degree of alignment was yielded at the take-up speed of 8.8 m/s with the maximum second-order orientation parameter of 0.869. Electrochemical spectroscopy analysis showed that the aligning of proton conductive nanofibers improved inplane proton conductivity about 67%. POLYM. ENG. SCI., 58:619-631,

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“…Kao et al prepared a blend of the poly(3-phenyl-3,4-dihydro-2H-1,3-benzoxazine) and PAN to produce low-surface-free-energy fibers for biononfouling membrane without fluorine and silicon elements [33]. Li and Liu reported polyelectrolyte composite membranes of polybenzimidazole and cross-linked polybenzimidazole/polybenzoxazine electrospun nanofibers for proton exchange membrane fuel cells [34]. The aforementioned studies always used additional polymers as a carrier matrix or main polymeric matrix for the electrospinning of nanofibers incorporating polybenzoxazine.…”

Section: Introductionmentioning

confidence: 99%

Main-chain polybenzoxazine nanofibers via electrospinning

Ertaş¹,

Uyar²

2014

Polymer

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a b s t r a c tHere we report the successful production of nanofibers from main-chain polybenzoxazines (MCPBz) via electrospinning without using any other carrier polymer matrix. Two different types of MCPBz (PBA-ad6 and PBA-ad12) were synthesized by using two types of difunctional amine (1,6-diaminohexane and 1,12-diaminododecane), bisphenol-A, and paraformaldehyde as starting materials through a Mannich reaction.1 H NMR and FTIR spectroscopy studies have confirmed the chemical structures of the two MCPBz.We were able to obtain highly concentrated homogeneous solutions of the two MCPBz in chloroform/ N,N-dimethylformamide (DMF) (4:1, v/v) solvent system. The electrospinning conditions were optimized in order to produce bead-free, uniform and continuous nanofibers from these two MCPBz by varying the concentrations of PBA-ad6 (30e45%, w/v) and PBA-ad12 (15e20%, w/v) in chloroform/DMF (4:1, v/v). The bead-free fiber morphology was evidenced under SEM imaging when PBA-ad6 and PBAad12 were electrospun at solution concentration of 40% and 18% (w/v), respectively. The nanofibrous mats of MCPBz were obtained as free-standing material, yet, PBA-ad12 mat was more flexible than and PBA-ad6 mat. Furthermore, the curing studies of these MCPBz nanofibrous mats were performed to obtain cross-linked materials.

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Polyelectrolyte composite membranes of polybenzimidazole and crosslinked polybenzimidazole-polybenzoxazine electrospun nanofibers for proton exchange membrane fuel cells

Cited by 99 publications

References 54 publications

Hydrophilically surface-modified and crosslinked polybenzimidazole membranes for pervaporation dehydration on tetrahydrofuran aqueous solutions

Hydrophilically surface-modified and crosslinked polybenzimidazole membranes for pervaporation dehydration on tetrahydrofuran aqueous solutions

Modeling and optimization of sulfonated poly (ether ether ketone) nanofibrous proton exchange membranes with response surface methodology

Main-chain polybenzoxazine nanofibers via electrospinning

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