1. JCCT
  2. Ch&ChT Vol. 20, No. 1, 2026
  3. Conductive Membranes Obtained From Comb-Type Fluoroorganosiloxanes and Fluoroorganic Salts

Conductive Membranes Obtained From Comb-Type Fluoroorganosiloxanes and Fluoroorganic Salts

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Tamara Tatrishvili1,2, Tinatini Bukia2,3, Nikolozi Kvinikadze1,2, Nana Pirtskheliani2,4, Tamar Makharadze2,3
Affiliation: 
1 Ivane Javakhishvili' Tbilisi State University, Department of Macromolecular Chemistry. 1 I. Chavchavadze Ave., Tbilisi 0179, Georgia 2 Institute of Macromolecular Chemistry and Polymeric Materials, Ivane Javakhishvili Tbilisi State University, 13 I. Chavchavadze Ave, Tbilisi 0179, Georgia 3 Vladimir Chavchanidze Institute of Cybernetics of the Georgian Technical University, 5 Z. Andjzaparidze St., Tbilisi 0186, Georgia 4 Sokhumi State University, Faculty of Natural Sciences, Mathematics, Technologies and Pharmacy, 61 Politkovskaya St., Tbilisi 0186, Georgia tamar.tatrishvili@tsu.ge
DOI: 
https://doi.org/10.23939/chcht20.01.081
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PDF icon full_text.pdf1.54 MB
Keywords: 
hydrosilylation
sol-gel reactions
spectroscopy
polymer electrolyte membranes
ionic conductivity
Abstract: 
In this study, the hydrosilylation reaction of tetrahydrotetramethylcyclotetrasiloxane with allyl trifluoroacetate proceeded in the presence of catalysts (platinum, hydrochloric acid, Karstedt's catalysts, and Pt/C (10%) at 323K was investigated. The expected D4R adduct was obtained. The D4R sample was analyzed by FTIR, 1H, 13C, and 29Si NMR spectroscopy. A polymerization reaction of D4R-type fluoroorganocyclotetrasiloxane was carried out in the presence of a tetramethylammonium fluoride catalyst. The resultant reaction produced comb-type fluoro-organosiloxanes. Sol-gel reactions of fluoro organosiloxanes doped with lithium trifluoromethylsulfonate (triflate) or lithium bis(trifluoromethanesulfonyl)imide and tetraethoxysilane have been the subject of study, and solid polymer electrolyte membranes have been obtained. The ionic conductivities of these membranes have been determined using the technique of electrical impedance spectroscopy. It has been found that the electric conductivity of the polymer electrolyte membranes at room temperature changes in the range from 7.8x10-7 to 3.2x10-6 S/cm. This compound is an interesting product because, in addition to ester groups, it also contains fluorine host donor groups and, via sol-gel reactions, directly gives us thin films.
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