Nanocomposite polymer electrolytes containing silica nanoparticles: Comparison between poly(ethylene glycol) and poly(ethylene oxide) dimethyl ether

Abstract

Nanocomposite polymer electrolytes consisting of low molecular weight poly(ethylene oxide) (PEO), iodine salt MI (M 5 K 1 , imidazolium 1 ), and fumed silica nanoparticles have been prepared and characterized. The effect of terminal group in PEO, i.e., hydroxyl (À ÀOH) and methyl (CH 3 ) using poly(ethylene glycol) (PEG) and PEO dimethyl ether (PEODME), respectively, was investigated on the interactions, structures, and ionic conductivities of polymer electrolytes. Wide angle X-ray scattering (WAXS), differential scanning calorimetry (DSC), and complex viscosity measurements clearly showed that the gelation of PEG electrolytes occurred more effectively than that of PEODME electrolytes. It was attributed to the fact that the hydroxyl groups of PEG participated in the hydrogenbonding interaction between silica nanoparticles, and consequently helped to accelerate the gelation reaction, as confirmed by FTIR spectroscopy. Because of its interaction, the ionic conductivities of PEG electrolytes (maximum value $ 6.9 3 10 24 S/cm) were lower than that of PEODME electrolytes (2.3 3 10 23 S/cm).

Surface-initiated atom transfer radical polymerization from TiO2 nanoparticles

“…These new broad absorption bands are attributed to the water molecules bound to hydrophilic polymeric chains. Different band position of -OH stretching vibrations are presumably due to the different interaction strength of water molecules with the two systems [24,25]. In the graft polymerization of POEM, two absorption bands at 1720 and 1110 cm À1 appeared, attributed to the stretching vibrations of carbonyl oxygen (C O) and ether oxygen (C-O-C), respectively [26].…”

Preparation, characterization, and electrical properties of ZSM-5/PEG composite particles

“…The obtained values were 11.389, 11.326, 11.201, and 11.086 Å for the composites having the ZSM‐5 ratios of 5, 10, 20, and 30%, respectively. In this context, Park et al have reported a Bragg d ‐spacing decreased with increasing concentration of fumed silica nanoparticles in their polymer electrolytes/silica nano‐composites. In agreement with that work, the observed d ‐spacing decrease could be attributed to the chain contraction and/or densiffcation in composite upon the addition of ZSM‐5 zeolite.…”

Structure Analysis of Fe3O4@SiO2 Core Shells Prepared from Amorphous and Crystalline SiO2 Particles

“…Typically, the SiO2 nanoparticle has an amorphous phase, and it can be commercially produced as silica gel, fume-silica, and so forth. Several applications of SiO2 nanoparticles for examples such as medical purposes [22][23][24], as additives for rubber and plastics [25][26][27], as fillers for composite construction concrete [28][29][30], as stabilizers and agents drug delivery and theranostics [23,31], and as a heavy metal absorbent material in a water filter [14], [22].…”