Ion exchange membranes based on silica and sulfonated copolymers of styrene with allyl glycidyl ether


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Abstract

Proton-conducting membranes have been obtained by sol–gel synthesis involving tetraethyl orthosilicate and sulfonated suspension copolymers of styrene with allyl glycidyl ether. The membranes are gels consisting of a polymer matrix, in which silica particles are uniformly distributed. The synthesized membranes are characterized by the proton conductivity of up to 4.21 × 10–2 S/cm at 343 K and 75% humidity, an ion exchange capacity of 3.5 meq/g, a proton-transfer activation energy of 25.2 ± 2.6 kJ/mol, thermal stability of up to 130°C, and mechanical strength (tensile modulus of elasticity, 322 MPa).

About the authors

O. V. Lebedeva

Irkutsk National Research Technical University

Author for correspondence.
Email: lebedeva@istu.edu
Russian Federation, Irkutsk, 664074

E. A. Malahova

Angarsk State Technical University

Email: lebedeva@istu.edu
Russian Federation, Angarsk, 665835

E. I. Sipkina

Irkutsk National Research Technical University

Email: lebedeva@istu.edu
Russian Federation, Irkutsk, 664074

A. N. Chesnokova

Irkutsk National Research Technical University

Email: lebedeva@istu.edu
Russian Federation, Irkutsk, 664074

A. V. Kuzmin

Limnological Institute, Siberian Branch; Favorsky Institute of Chemistry of Irkutsk, Siberian Branch

Email: lebedeva@istu.edu
Russian Federation, Irkutsk, 664033; Irkutsk, 664033

S. D. Maksimenko

Irkutsk National Research Technical University

Email: lebedeva@istu.edu
Russian Federation, Irkutsk, 664074

Yu. N. Pozhidaev

Irkutsk National Research Technical University

Email: lebedeva@istu.edu
Russian Federation, Irkutsk, 664074

A. E. Rzhechitskiy

Irkutsk National Research Technical University

Email: lebedeva@istu.edu
Russian Federation, Irkutsk, 664074

T. V. Raskulova

Angarsk State Technical University

Email: lebedeva@istu.edu
Russian Federation, Angarsk, 665835

N. A. Ivanov

Irkutsk National Research Technical University

Email: lebedeva@istu.edu
Russian Federation, Irkutsk, 664074

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