Abstract
Hybrid organic-inorganic membranes based on tetraethoxysilane and orthophosphoric acid-doped copolymers of 4-vinylpyridine (4-VP) and 2-hydroxyethyl methacrylate (HEMA) have been formed by the sol-gel synthesis method. The membranes are characterized by high values of exchange capacity and proton conductivity. An increase in the proton conductivity of hybrid organo-inorganic membranes compared to the initial copolymer can be associated with the generation of crystallization water during the formation of a silicon dioxide fragment, which follows from quantum-chemical modeling of the local structure of the membrane. The latter includes an organic part from the copolymerization product of 4-VP with HEMA (44 atoms) and an inorganic part of 27 atoms, repeating the structure of the silicon dioxide block.
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Lebedeva, O.V., Raskulova, T.V., Beznosyuk, S.A. et al. Structural Features of 4-VP-HEMA-SiO2 Hybrid Membranes and Their Proton Conductivity. Membr. Membr. Technol. 5, 92–97 (2023). https://doi.org/10.1134/S251775162302004X
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DOI: https://doi.org/10.1134/S251775162302004X