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Preparation of Covalent-Ionically Cross-Linked UiO-66-NH2/Sulfonated Aromatic Composite Proton Exchange Membranes With Excellent Performance.
Zheng, Penglun; Liu, Quanyi; Wang, Donghui; Li, Zekun; Meng, Yawei; Zheng, Yun.
Afiliación
  • Zheng P; College of Civil Aviation Safety Engineering, Civil Aviation Flight University of China, Guanghan, China.
  • Liu Q; College of Civil Aviation Safety Engineering, Civil Aviation Flight University of China, Guanghan, China.
  • Wang D; College of Civil Aviation Safety Engineering, Civil Aviation Flight University of China, Guanghan, China.
  • Li Z; College of Civil Aviation Safety Engineering, Civil Aviation Flight University of China, Guanghan, China.
  • Meng Y; College of Civil Aviation Safety Engineering, Civil Aviation Flight University of China, Guanghan, China.
  • Zheng Y; Key Laboratory of Optoelectronic Chemical Materials and Devices, Ministry of Education, Jianghan University, Wuhan, China.
Front Chem ; 8: 56, 2020.
Article en En | MEDLINE | ID: mdl-32133339
Metal-organic frameworks (MOFs), as newly emerging filler materials for polyelectrolytes, show many compelling intrinsic features, such as variable structural designability and modifiability of proton conductivity. In this manuscript, UiO-66-NH2, a stable MOF with -NH2 functional groups in its ligands, was selected to achieve a high-performance sulfonated poly(arylene ether nitrile)s (SPENs)/UiO-66-NH2-x covalent-ionically cross-linked composite membrane. Simultaneously, the obtained composite membranes displayed excellent thermal stability and dimensional stability. The as-prepared SPEN/UiO-66-NH2-x cross-linked membranes exhibited higher proton conductivity than recast SPENs, which can be attributed to the construction of ionic clusters and well-connected ionic nanochannels along the interface between UiO-66-NH2-x and SPEN matrix via molecular interactions. Meanwhile, the methanol permeability of the SPEN/UiO-66-NH2-x composite membrane had been effectively reduced due to the barrier effect of cross-linking and the addition of UiO-66-NH2-x. The SPEN/UiO-66-NH2-5 composite membrane had the highest selectivity of 6.42 × 105 S·s·cm-3: 14.3-times higher than that of Nafion 117. The preparation of cross-linked UiO-66-NH2/SPEN composite was facile, which provides a new strategy for preparing high performance proton exchange membrane.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Front Chem Año: 2020 Tipo del documento: Article País de afiliación: China Pais de publicación: Suiza
Texto completo
Añadir a Mi BVS
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Front Chem Año: 2020 Tipo del documento: Article País de afiliación: China Pais de publicación: Suiza