Constructing Flexible Proton Exchange Membranes Through Alternate Deposition of Kevlar Nanofibers and Polydopamine Coating Polystyrene-Block-Poly(ethylene-ran-butylene)-Block-Polystyrene 


Vol. 24,  No. 4, pp. 1183-1194, Apr.  2023
10.1007/s12221-023-00140-9


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  Abstract

The fl exible proton exchange membrane (PEM) was constructed through alternate deposition of Kevlar nanofi bers and polydopamine (PDA)-coating polystyrene-block-poly(ethylene-ran-butylene)-block-polystyrene (SEBS) with spin coating technology. In the prepared (Kevlar/PDA@SEBS) 5 membrane, the Kevlar nanofi bers could withstand the external mechanical force owing to the fi ber structure, while the fl exible PEM was folded or stretched. The adhesive PDA coating was formed with the self-polymerization of dopamine protected the molecular chains of SEBS and further supported the fl exible PEM. The structure of PDA coating SEBS could avoid the microstructure fracture of the fl exible PEM during the folding and stretching operations. Notably, the multilayered structure promoted the phosphoric acid (PA) molecules motion through reducing the ion conduction resistance. For instance, the pristine (Kevlar/PDA@SEBS) 5 /PA membrane exhibited the proton conductivity of 4.11 횞 10 2 S/cm at 160 째C, which was comparable to 4.13 횞 10 2 S/cm of the folded membrane and (4.074.78) 횞 10 2 S/ cm of the stretched membranes. The stable microstructure guaranteed the stiff ness, such as 4.15 MPa of the (Kevlar/PDA@ SEBS) 5 -fold/PA membrane and (3.506.34) MPa of (Kevlar/PDA@SEBS) 5 -stretched/PA membranes. Furthermore, the stretched membrane possessed the long-term proton conductivity stability, which was indicative of the microstructure and component stabilities.

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  Cite this article

[IEEE Style]

D. Song, K. Liu, T. Zuo, X. Wei, S. Hu, Q. Che, "Constructing Flexible Proton Exchange Membranes Through Alternate Deposition of Kevlar Nanofibers and Polydopamine Coating Polystyrene-Block-Poly(ethylene-ran-butylene)-Block-Polystyrene," Fibers and Polymers, vol. 24, no. 4, pp. 1183-1194, 2023. DOI: 10.1007/s12221-023-00140-9.

[ACM Style]

Di Song, Ke Liu, Tingting Zuo, Xiaoqing Wei, Shu Hu, and Quantong Che. 2023. Constructing Flexible Proton Exchange Membranes Through Alternate Deposition of Kevlar Nanofibers and Polydopamine Coating Polystyrene-Block-Poly(ethylene-ran-butylene)-Block-Polystyrene. Fibers and Polymers, 24, 4, (2023), 1183-1194. DOI: 10.1007/s12221-023-00140-9.

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pISSN : 1229 - 9197
eISSN : 1875 - 0052

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