Quaternized poly(aromatic ether sulfone) with siloxane crosslinking networks as high temperature proton exchange membranes

Wang, Jin; Jiang, Haoxing; Xu, Yan; Yang, Jingshuai

doi:10.1016/j.apsusc.2018.05.063

Cited by 50 publications

(30 citation statements)

References 46 publications

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“…The imidazole groups react with benzyl bromide groups of BPPO through an S N 2 type nucleophilic reaction, providing functional sites for PA doping via the anion–cation interaction. Meanwhile, the hydrolysis of siloxane moieties of SiIm in acidic conditions generate the siloxane crosslinked structure to enhance the mechanical and dimensional stabilities . The chemical structures of PPO, BPPO, PPO‐100%MeIm and PPO‐100%SiIm‐Un were characterized using 1 H NMR as shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…The membranes were wiped with filter paper and then dried in a vacuum oven at 100 °C to remove water thoroughly and were weighed immediately to calculate the PA uptake. The PA doping ability was determined by both PA doping content and acid doping level (ADL) as previously reported . The corresponding equations are

acid doping content (%) = \frac{W - W_{0}}{W_{0}} \times 100

ADL = \frac{(W - W_{0}) \times M}{W_{0} \times 98}

where W and W 0 are the membrane mass (g) with and without acid doping, respectively, and M is the average molecular weight (g mol −1 ) of various PPO‐ x %SiIm‐ y %MeIm membranes.…”

Section: Methodsmentioning

confidence: 99%

“…Thus the development of alternative superior membrane electrolytes for HT‐PEMs is strongly desired. Several functionalized polymeric materials with excellent thermal stability and high PA doping capability have been proposed to fabricate HT‐PEMs, such as quaternary ammonium/imidazolium group side‐chain grafting of poly(aromatic ether)s and pyridine/pyrrolidone/acrylic acid group main‐chain containing polymers.…”

Section: Introductionmentioning

confidence: 99%

“…The redundant doped PA could increase the skeleton distance of the polymers, reduce intermolecular forces and thus decrease the mechanical strength and the lifetime of the fuel cell . This trade‐off between conductivity and mechanical strength can be expressed by chemical crosslinking, which has been regarded as an effective and widely used approach for the integration of superior properties of HT‐PEMs . For example, Na et al .…”

Section: Introductionmentioning

confidence: 99%

“…However, there are few reports on HT‐PEMs based on PPO derivatives . Inspired by previous work, we tried to design and prepare new HT‐PEMs based on imidazolium siloxane crosslinked PPO with excellent comprehensive performances. The imidazole groups in MeIm and SiIm reacted with the benzylbromide groups (–CH 2 Br) of BPPO in different mole ratios to obtain a series of imidazolium PPO membranes (PPO‐SiIm‐MeIm).…”

Section: Introductionmentioning

confidence: 99%

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Fabrication and investigation of phosphoric acid doped imidazolium siloxane crosslinked poly(2,6‐dimethyl‐1,4‐phenylene oxide) for high temperature polymer electrolyte membranes

Ren

Yang

et al. 2019

Polymer International

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A series of high temperature polymer electrolyte membranes were fabricated based on imidazolium poly(2,6-dimethyl-1, 4-phenylene oxide) (PPO) using methylimidazole (MeIm) and triethoxysilylpropyldihydroimidazole (SiIm) as quaternization reagents via the S N 2 nucleophilic substitution. Meanwhile SiIm was also employed as a crosslinking agent and the crosslinked Si-O-Si network was constructed through a hydrolysis procedure of SiIm in an acid medium. Compared with the PPO-100%MeIm membrane without the crosslinking structure, the imidazolium siloxane crosslinked PPO-x%SiIm-y%MeIm membranes exhibited increased acid doping contents, enhanced dimensional stabilities, improved mechanical properties and higher conductivities. The PPO-30%SiIm-70%MeIm/(198 wt% phosphoric acid) membrane displayed a conductivity of 0.08 S cm −1 at 180 ∘ C without humidifying and a tensile strength of 6.4 MPa at room temperature.

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Section: Resultsmentioning

confidence: 99%

acid doping content (%) = \frac{W - W_{0}}{W_{0}} \times 100

ADL = \frac{(W - W_{0}) \times M}{W_{0} \times 98}

where W and W 0 are the membrane mass (g) with and without acid doping, respectively, and M is the average molecular weight (g mol −1 ) of various PPO‐ x %SiIm‐ y %MeIm membranes.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Fabrication and investigation of phosphoric acid doped imidazolium siloxane crosslinked poly(2,6‐dimethyl‐1,4‐phenylene oxide) for high temperature polymer electrolyte membranes

Ren

Yang

et al. 2019

Polymer International

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Synthesis and Properties of Polysilsesquioxane Functionalized Poly(p‐terphenyl‐co‐N‐methyl‐4‐piperidine) Membrane for High Temperature Proton Exchange Membrane Fuel Cells

Wang,

Wang

et al. 2024

Advanced Sustainable Systems

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The development of high‐performance, cost‐effective high temperature polymer electrolyte membranes (HT‐PEMs) is a great challenge for HT‐PEM fuel cells. In this study, a new HT‐PEM of polysilsesquioxane functionalized poly(p‐terphenyl‐co‐N‐methyl‐4‐piperidine) (PTP‐CPTMS) is reported. Owing to the incorporation of the polysilsesquioxane network, the PTP‐CPTMS membrane demonstrates an excellent phosphoric acid (PA) doping capacity and controlled swelling, compared to the benchmarks, that is, pristine PTP membrane and propyl group grafted PTP membrane (PTP‐C3). As a result, the PTP‐CPTMS/208%PA membrane exhibits a low volume swelling of 77%, a high conductivity of 0.070 S cm−1 at 180 °C and a satisfactory tensile strength of 4.9 MPa at room temperature. Based on the above membrane, the H2‐O2 single cell is assembled and displays a steadily increased peak power density up to 220 °C, which is 769 mW cm−2 without the need for external humidification or backpressure. This work provides a kind of polysilsesquioxane functionalized HT‐PEMs, which hold substantial potential for application in HT‐PEM fuel cells.

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Computer‐Aided Design of Crosslinked Polymer Membrane Using Machine Learning and Molecular Dynamics

Guo

Chai

Zhang

et al. 2022

Chemie Ingenieur Technik

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The formation of crosslinking network between polymer chains has significant influence on polymer properties. In particular, the crosslinked structure of ionic networks like proton exchange membrane affects the conductivity performance. To further develop in this area, a framework for polymer membrane design based on the developed quantitative prediction model of the properties of crosslinked polymer is proposed. First, polymers with different crosslinking degrees are constructed by a crosslinking algorithm. Next, molecular dynamics is used to calculate the properties of crosslinked polymers. Then, the quantitative relationship between crosslinked polymer structures and macroscopical properties is developed. Subsequently, computer-aided polymer design method is integrated with the developed quantitative predict model. The crosslinked polymer design problem is expressed as an optimization problem to obtain the optimal crosslinking degree. Bayesian optimization strategy is used to solve the established optimization model. Finally, two case studies of perfluoro sulfonic acid and perfluoro imide acid design are given to illustrate the application of the proposed polymer design framework.

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Quaternized poly(aromatic ether sulfone) with siloxane crosslinking networks as high temperature proton exchange membranes

Cited by 50 publications

References 46 publications

Fabrication and investigation of phosphoric acid doped imidazolium siloxane crosslinked poly(2,6‐dimethyl‐1,4‐phenylene oxide) for high temperature polymer electrolyte membranes

Fabrication and investigation of phosphoric acid doped imidazolium siloxane crosslinked poly(2,6‐dimethyl‐1,4‐phenylene oxide) for high temperature polymer electrolyte membranes

Synthesis and Properties of Polysilsesquioxane Functionalized Poly(p‐terphenyl‐co‐N‐methyl‐4‐piperidine) Membrane for High Temperature Proton Exchange Membrane Fuel Cells

Computer‐Aided Design of Crosslinked Polymer Membrane Using Machine Learning and Molecular Dynamics

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