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Hybrid ion-exchange membranes based on heteroaromatic sulfonic acid derivatives
Abstract Membranes exhibiting proton conductivity have been prepared by sol-gel synthesis using tetraethoxysilane and heteroaromatic sulfonic acid derivatives (2-phenyl-5-benzimidazolesulfonic acid and 3-pyridinesulphonic acid) in the presence of phosphoric acid and polyvinyl butyral. The membranes are gels composed of a polyvinyl butyral polymer matrix with uniformly distributed particles of silica containing molecules of heteroaromatic sulfonic acid derivatives mechanically incorporated in its network structure. The membranes synthesized from 2-phenyl-5-benzimidazolesulfonic acid or 3-pyridinesulphonic acid exhibit a conductivity of 0.1 × 10−2 or 0.55 × 10−2 S/cm at 353 K, an ion-exchange capacity of 2.70 or 1.84 mequiv/g, and a proton-transfer activation energy of 24.93 or 21.73 kJ/mol, respectively; at a relative water content of 50%, the tensile strength is 4 or 6 MPa and the elastic modulus is 128 or 191 MPa, respectively.
Hybrid ion-exchange membranes based on heteroaromatic sulfonic acid derivatives
Abstract Membranes exhibiting proton conductivity have been prepared by sol-gel synthesis using tetraethoxysilane and heteroaromatic sulfonic acid derivatives (2-phenyl-5-benzimidazolesulfonic acid and 3-pyridinesulphonic acid) in the presence of phosphoric acid and polyvinyl butyral. The membranes are gels composed of a polyvinyl butyral polymer matrix with uniformly distributed particles of silica containing molecules of heteroaromatic sulfonic acid derivatives mechanically incorporated in its network structure. The membranes synthesized from 2-phenyl-5-benzimidazolesulfonic acid or 3-pyridinesulphonic acid exhibit a conductivity of 0.1 × 10−2 or 0.55 × 10−2 S/cm at 353 K, an ion-exchange capacity of 2.70 or 1.84 mequiv/g, and a proton-transfer activation energy of 24.93 or 21.73 kJ/mol, respectively; at a relative water content of 50%, the tensile strength is 4 or 6 MPa and the elastic modulus is 128 or 191 MPa, respectively.
Hybrid ion-exchange membranes based on heteroaromatic sulfonic acid derivatives
Lebedeva, O. V. (author) / Chesnokova, A. N. (author) / Badlueva, T. V. (author) / Sipkina, E. I. (author) / Rzhechitskii, A. E. (author) / Pozhidaev, Yu. N. (author)
Petroleum Chemistry ; 55 ; 333-338
2015-06-23
6 pages
Article (Journal)
Electronic Resource
English
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