Crosslinked norbornene copolymer anion exchange membrane for fuel cells

Wang, Chao; Mo, Biming; He, Zhenfeng; Shao, Qian; Pan, Duo; Wujick, Evan; Guo, Jiang; Xie, Xiaoguang; Xie, Xiang; Guo, Zhanhu

doi:10.1016/j.memsci.2018.03.080

Cited by 172 publications

(90 citation statements)

References 43 publications

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“…But too much PUB also brings harmful influence on mechanical properties due to the higher hydrophilic property of PUB and the decreased compatibility. The TS of the CS/PAADDA/PUB membrane is close to the pristine CS membrane (24.17 MPa), the CS/RCD membrane (27.63 MPa), the QA sIPN‐70/30 membrane (21.2 MPa), the QAPPO/xPEG‐PAGE (SIPN‐60‐1) membrane (30.8 MPa), the PVP‐based SIPNs‐60 membrane (28.1 MPa), the QPS/PPO sIPN‐75/20 membrane (24.6 MPa), the QPIENPC membrane (22.39 MPa), the QPVA/KOH2 membrane (24.4 MPa), and is higher than Semi‐IPN QCS/PS (38% PS; 17.5 MPa), the QBAPB/PVA membrane (18.3MPa), the PVA/PDDA membrane (15.3 MPa), the QHPEEK1.30 membrane (17.0 MPa), and the crosslinked polynorbornene membrane (15.18 MPa) . The results show the CS/PAADDA/PUB membrane has great prospects since the film could be well used in the process of actual application.…”

Section: Resultsmentioning

confidence: 85%

Application of a novel PUB enhanced semi‐interpenetrating chitosan‐based anion exchange membrane

2019

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Summary A novel OH− conducting membrane containing chitosan (CS), poly‐(acrylamide‐co‐diallyldimethylammonium chloride) (PAADDA) and linear structured poly‐bis (2‐chloroethyl) ether‐1,3‐bis [3‐(dimethylamino)propyl] urea copolymer (PUB) was synthesized via a solution‐casting method and subsequently modified by hot treatment and chemical cross‐linking. The structural characterizations of scanning electron microscope (SEM), atomic force microscope (AFM), Fourier transform infrared spectra (FT‐IR), and X‐ray photoelectron spectroscopy (XPS) were carried out, showing that CS, PAADDA, and PUB formed a compact interpenetrating polymer network structure without apparent phase separation phenomenon under the help of cross‐linking. By changing the content of PUB in the membrane, the application performance such as mechanical properties, thermal gravimetric (TG) analysis, water uptake (WU), OH− conductivity ( σOH−) and ion exchange capacity (IEC) were investigated to evaluate the feasibility for alkaline membrane fuel cells. The maximum OH− conductivity could be reached up to 3.12 × 10−2 S cm−1 at 80°C in a mass ratio of CS/PAADDA/PUB (1:0.5:0.5) while a good tensile strength of 22.73 MPa and an excellent elongation at break of 23.55% could be obtained in a mass ratio of CS/PAADDA/PUB (1:0.5:0.25). Furthermore, the membrane also exhibited relatively high oxidative stability as well as excellent alkaline resistance stability, when conditioned in 30% H2O2 solution at ambient temperature for 120 hours and 8 M KOH solution at 60°C for 320 hours, respectively. Membrane electrode assemblies (MEAs) achieved a peak power density of 38.1 mW cm−2 at the maximum current density of 73.2 mA cm−2 in a H2/O2 system at room temperature. PUB was successfully introduced into the CS‐based membrane to improve the conductivity. Maximum OH− conductivity reached 0.016 S cm−1 at room temperature. Tensile strength of the prepared membrane could reach up to 22.73 MPa. The prepared membrane exhibited an excellent elongation at break of 23.55%. The membrane showed good oxidative stability and excellent alkaline resistance stability.

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Section: Resultsmentioning

confidence: 85%

Application of a novel PUB enhanced semi‐interpenetrating chitosan‐based anion exchange membrane

2019

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“…In the upper‐layer coating, the cross‐linked underlayer is not affected by the solvent of the upper layer, and it makes the fabrication of multilayer OLEDs possible. The cross‐linkable groups chosen for previous studies include thermally and/or photochemically initiated moieties such as acrylates, benzocyclobutenes (BCBs), trifluorovinyl ethers, oxetanes, norborneol, or styrenes . The cross‐linking materials can be divided into two process types: photochemical and thermal.…”

Section: Figurementioning

confidence: 99%

Low‐Temperature Cross‐Linkable Small Molecules for Fully Solution‐Processed OLEDs

Lee

Seo

2018

Chemistry A European J

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Cross-linkable hole-transporting, host, and electron-transporting materials with a new cross-linking group, uracil, are designed and synthesized. These compounds exhibited good solubility in common organic solvents and excellent solvent resistance after cross-linking at a low temperature of 120 °C. The OLED was fabricated by all-solution processing using cross-linkable synthetic compounds, except for the electrodes. This device exhibited a current efficiency of 39.2 cd A and a power efficiency of 15.3 lm W .

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“…In this regards, wide ranges of properties such as enriched mechanical/thermal properties, conductivity and porosity can be achieved by the selection of proper materials. Nanofibers along with high surface to volume ratio and adjustable mechanical, porous topological features, low cost, tunable flexibility, and strength as an applicable technique have been utilized in various applications with on large scale such as removal, wearable strain sensors, high temperature detector, and fuel cells, exchange membrane moreover, nanofibers can provide a proper milieu for cellular activities…”

Section: Introductionmentioning

confidence: 99%

Electrospun electroactive nanofibers of gelatin‐oligoaniline/Poly (vinyl alcohol) templates for architecting of cardiac tissue with on‐demand drug release

Shojaie

Rostamian

Samadi

et al. 2019

Polymers for Advanced Techs

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In this study, grafted gelatin with oligoaniline (GelOA) was synthesized and then mixed with Poly (vinyl alcohol) (PVA). Several scaffolds with different ratio of PVA/GelOA were electrospun to fabricate electroactive scaffolds. GelOA was characterized using Fourier‐transform infrared spectroscopy (FTIR); moreover, nanofiber properties were evaluated by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and scanning electron microscope (SEM) analyses. Nanofibers diameter was decreased with aniline oligomer increment form 300 to 150 nm because of the hydrophobic nature of the aniline oligomer. Aniline oligomer electroactivity was studied using cyclic voltammetry, which exhibited two redox peaks at 0.4 and 0.6. Moreover, aniline oligomer enhancement resulted in melting point increasing from 220°C to 230°C because of the crystallinity increment. To assess the biocompatibility of nanofibers, cell viability and cell adhesion were tracked using mesenchymal stem cell (MSCs). It was revealed that the presence of aniline oligomer leads to enhancing the conductivity, thermal properties and lowering the degradation rate and drug release. Among of different scaffolds, sample with high content of GelOA shows better behavior in physical and biological properties. Accumulative drug releases under applied electrical field at 40 minutes showed that the drug release for stimulated condition is about 33% more than the unapplied electrical field one.

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Crosslinked norbornene copolymer anion exchange membrane for fuel cells

Cited by 172 publications

References 43 publications

Application of a novel PUB enhanced semi‐interpenetrating chitosan‐based anion exchange membrane

Application of a novel PUB enhanced semi‐interpenetrating chitosan‐based anion exchange membrane

Low‐Temperature Cross‐Linkable Small Molecules for Fully Solution‐Processed OLEDs

Electrospun electroactive nanofibers of gelatin‐oligoaniline/Poly (vinyl alcohol) templates for architecting of cardiac tissue with on‐demand drug release

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