scholarly journals Synthesis of cross-linked comb-type polysiloxane for polymer electrolyte membranes

e-Polymers ◽  
2012 ◽  
Vol 12 (1) ◽  
Author(s):  
Omar Mukbaniani ◽  
Jimsher Aneli ◽  
Tamara Tatrishvili ◽  
Eliza Markarashvili ◽  
Maia Chigvinadze ◽  
...  
Keyword(s):  
Polymer Electrolyte ◽  
Sol Gel ◽  
Gel Permeation Chromatography ◽  
Catalytic Amount ◽  
Polymer Electrolyte Membranes ◽  
Solid Polymer ◽  
Side Chain ◽  
Differential Scanning Calorimetric ◽  
Anion Receptors ◽  
Electrolyte Membranes

Abstract Hydrosilylation reaction of 2.4.6.8-tetrahydro-2.4.6.8-tetramethylcyclotetrasiloxane with allyl acetoacetate and vinyltriethoxysilane at 1:3:1 ratio of initial compounds in the presence of Karstedt’s catalyst (Pt2[(VinSiMe2)2O]3), platinum hydrochloric acid (0.1 M solution in THF) and platinum on the carbon have been studied and D4R,R’ type methylorganocyclotetrasiloxane has been obtained. Ring-opening co-polymerization reactions of methylorganocyclotetrasiloxane and hexamethyldisiloxane, in the presence of catalytic amount of powder-like potassium hydroxide, have been carried out and linear methylsiloxane oligomer with regular arrangement of propyl acetoacetate and triethoxysilane groups in the side chain has been obtained. The synthesized methylorganocyclotetrasiloxane and oligomers were studied by FTIR, 1H, 13C, 29Si NMR spectroscopy. Comb-type oligomers were characterized by gel-permeation chromatography, wide- angle X-ray and differential scanning calorimetric methods. Via sol-gel processes of doped with lithium trifluoromethylsulfonate (triflate) or lithium bis- (trifluoromethylsulfonyl)imide oligomer systems solid polymer electrolyte membranes have been obtained. The dependence of ionic conductivity as a function of temperature and salt concentration has been studied. The electrical conductivity of these materials at room temperature belongs to the range of 7x10-8 to 4x10-6 S cm-1 and depends on the structures of grafted anion receptors and the polymer backbones.

scholarly journals Synthesis and ionic conductivity of siloxane based polymer electrolytes with pendant propyl acetoacetate groups

2018 ◽  
Vol 90 (6) ◽  
pp. 989-999 ◽  
Author(s):  
Omari Mukbaniani ◽  
Witold Brostow ◽  
Jimsher Aneli ◽  
Tamara Tatrishvili ◽  
Eliza Markarashvili ◽  
...  
Keyword(s):  
Specific Conductivity ◽  
Sol Gel ◽  
Gel Permeation Chromatography ◽  
Polymerization Reaction ◽  
Side Chain ◽  
Anion Receptors ◽  
Scanning Calorimetry ◽  
Molar Ratios ◽  
Wide Range ◽  
Electrolyte Membranes

Abstract Hydrosilylation reaction of 2.4.6.8-tetrahydro-2.4.6.8-tetramethylcyclotetrasiloxane (D4H) with allyl acetoacetate at 1:4.1 molar ratios of initial compounds in the presence of platinum hydrochloric acid (0.1 M solution in THF), Karstedt’s catalyst (Pt2[(VinSiMe2)2O]3) and platinum on the carbon have been carried out and D4R type compounds obtained. Reaction order, rate constants and activation energies for hydrosilylation reactions in the presence of Karstedt’s catalyst have been determined. Ring-opening polymerization reaction of D4R in the presence of catalytic amounts of powder-like potassium hydroxide has been carried out. A linear methylsiloxane oligomer with regular arrangement of propyl acetoacetate groups in the side chain has been obtained. The synthesized methylorganocyclotetrasiloxane and oligomers were studied by FTIR, 1H, 13C and 29Si NMR spectroscopy. Comb-type oligomers were characterized by gel-permeation chromatography, wide-angle X-ray diffractometry and differential scanning calorimetry. Solid oligomer electrolyte membranes have been obtained via sol–gel processes involving lithium trifluoromethylsulfonate (triflate) or lithium bis(trifluoromethylsulfonyl)imide. The specific volumetric electrical conductivity of the membranes at room temperature covers a wide range, from 10−10 to 10−4 S · cm−1, and depends on the structures of grafted anion receptors and the polymer backbones. Higher values of the specific conductivity are seen for the membranes containing triflate.

scholarly journals Solid Polymer Electrolyte Membranes on the Basis of Fluorosiloxane Matrix

2021 ◽  
Vol 15 (2) ◽  
pp. 198-204
Author(s):  
Omari Mukbaniani ◽  
◽  
Jimsher Aneli ◽  
Tamara Tatrishvili ◽  
Eliza Markarashvili ◽  
...  
Keyword(s):  
Polymer Electrolyte ◽  
Ring Opening ◽  
Solid Polymer Electrolyte ◽  
Sol Gel ◽  
Polymer Electrolyte Membranes ◽  
Solid Polymer ◽  
29Si Nmr ◽  
Temperature Changes ◽  
Electrolyte Membranes ◽  
29Si Nmr Spectroscopy

Hydrosilylation reactions of 2,4,6,8-tetrahydro-2,4,6,8-tetramethylcyclotetrasiloxane (D4H) with 2,2,3,3,4,4,5,5-octafluoropentyl acrylate at 1:4.2 ratio of initial compounds catalysed by platinum catalysts have been studied and corresponding adduct D4R' has been obtained. Ring opening polymerization of D4R in the presence of dry potassium hydroxide has been carried out and comb-type polymers with 2,2,3,3,4,4,5,5-octafluoropentyl propionate side groups have been obtained. The synthesized product D4R and polymers were analyzed by FTIR, 1H, 13C, and 29Si NMR spectroscopy. The solid polymer electrolyte membranes have been obtained via sol-gel reactions of polymers with tetraethoxysilane doped with lithium trifluoromethylsulfonate (triflat) and lithium bis(trifluorosulfonyl)imide. It has been found that the electric conductivity of the polymer electrolyte membranes at room temperature changes in the range of (1.9•10-6) – (5.9•10-10) S•cm-1.

scholarly journals Strong and Flexible Composite Solid Polymer Electrolyte Membranes for Li-Ion Batteries

ACS Omega ◽  
2019 ◽  
Vol 4 (19) ◽  
pp. 18203-18209 ◽  
Author(s):  
Prasad Raut ◽  
Si Li ◽  
Yu-Ming Chen ◽  
Yu Zhu ◽  
Sadhan C. Jana
Keyword(s):  
Polymer Electrolyte ◽  
Solid Polymer Electrolyte ◽  
Polymer Electrolyte Membranes ◽  
Solid Polymer ◽  
Li Ion Batteries ◽  
Electrolyte Membranes ◽  
Li Ion ◽  
Composite Solid

Highly conductive solid polymer electrolyte membranes based on polyethylene glycol-bis-carbamate dimethacrylate networks

2017 ◽  
Vol 359 ◽  
pp. 441-449 ◽  
Author(s):  
Guopeng Fu ◽  
Janel Dempsey ◽  
Kosuke Izaki ◽  
Kaoru Adachi ◽  
Yasuhisa Tsukahara ◽  
...  
Keyword(s):  
Polyethylene Glycol ◽  
Polymer Electrolyte ◽  
Solid Polymer Electrolyte ◽  
Polymer Electrolyte Membranes ◽  
Solid Polymer ◽  
Electrolyte Membranes
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