Influence of various surface treated silica nanoparticles on the electrochemical properties of SiO2/polyurethane nanocoatings

“…It possesses high hardness (7 Mohs), low refractive index (1.46), and reasonable price among other nanoparticles that make it ideal to produce scratch-resistant, transparent and cost-effective coatings [19][20][21]. Furthermore, silica is an inorganic UV-absorber, exhibiting more stability than the usual organic UV-absorbers or light stabilizers.…”

Section: Introductionmentioning

confidence: 99%

The improvement of corrosion resistance of fluoropolymer coatings by SiO2/poly(styrene-co-butyl acrylate) nanocomposite particles

Chen

Song

et al. 2015

Applied Surface Science

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“…The sharp absorption bands at 1,011 and 520 cm −1 are assigned to the Si-O and Si-O-Si stretching vibrations, respectively [18,[49][50][51]. By observing the IR spec- [20,[49][50][51]. FTIR results suggest that CDI, AS and SiO 2 have successfully entered the SPES polymeric matrix.…”

Section: H Nmrmentioning

confidence: 98%

“…The strong stretching vibrations at 3,096-3,068 cm −1 correspond to the aromatic hydrogen (C-H) [48]. The sharp absorption bands at 1,011 and 520 cm −1 are assigned to the Si-O and Si-O-Si stretching vibrations, respectively [18,[49][50][51]. By observing the IR spec- [20,[49][50][51].…”

Section: H Nmrmentioning

confidence: 99%

Hybrid nanocomposite membranes of sulfonated poly(ethersulfone)/1,1-carbonyl diimidazole/1-(3-aminopropyl)-silane/silica for direct methanol fuel cells

Khosravi

Hassanajili

Moslemin

et al. 2016

Korean J. Chem. Eng.

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Composite membranes of sulfonated poly(ethersulfone)/1,1-carbonyl diimidazole/1-(3-aminopropyl)-silane/silica (SPES/CDI/AS/SiO 2 ) with silica of various contents (3, 5 and 8 wt%) were prepared as electrolytes for direct methanol fuel cells (DMFCs). Comparison was made with pure SPES and SPES/SiO 2 . The properties of the composite membranes were studied by FTIR, TGA, XRD, water and methanol uptake, proton conductivity. SPES/CDI/AS/SiO 2 membranes were also characterized by scanning electron microscopy (SEM), which showed good adhesion between the modified sulfonic acid (-SO 3 H) groups of SPES and silica because of cross-linking with covalent bond formation and reduced cavities in the composites. This effect played an important role in reducing water uptake, methanol uptake and methanol permeability of the SPES/CDI/AS/SiO 2 composites. The water and methanol uptake and also methanol permeability of the SPES/CDI/AS/SiO 2 composite membrane with 8% SiO 2 were found in the order 3.58%, 2.48% and 1.91×10 −7 (cm 2 s −1 ), lower than those of SPES and Nafion 117. In SPES membrane of 16.94% level of sulfonation, the proton conductivity was 0.0135 s/cm at 25 o C, which approached that of Nafion 117 under the same conditions. Also, the proton conductivity of the SPES/CDI/AS/SiO 2 8% membrane was 0.0186 s/cm, which was higher than that of SPES at room temperature. The preparation of SPES/SiO 2 composites in the presence of AS and CDI, led to 63%, 56% and 64% reduction of water uptake, methanol uptake and methanol permeability, respectively without a sharp drop in proton conductivity of the composite membranes which featured a good balance between high proton conductivity, water and methanol uptake of SPES/CDI/AS/SiO 2 membranes.

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Influence of various surface treated silica nanoparticles on the electrochemical properties of SiO2/polyurethane nanocoatings

Cited by 84 publications

References 40 publications

Influence of various types of silica nanoparticles on permeation properties of polyurethane/silica mixed matrix membranes

Influence of various types of silica nanoparticles on permeation properties of polyurethane/silica mixed matrix membranes

The improvement of corrosion resistance of fluoropolymer coatings by SiO2/poly(styrene-co-butyl acrylate) nanocomposite particles

Hybrid nanocomposite membranes of sulfonated poly(ethersulfone)/1,1-carbonyl diimidazole/1-(3-aminopropyl)-silane/silica for direct methanol fuel cells

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