scholarly journals Synthesis of Porous Ni/SiC(O)‐Based Nanocomposites: Effect of Nickel Acetylacetonate and Poly(Ethylene Glycol) Methacrylate Modification on Specific Surface Area and Porosity

2019 ◽  
Vol 22 (4) ◽  
pp. 1901036
Author(s):  
Sarabjeet Kaur ◽  
Guilherme Mônego ◽  
Kurosch Rezwan ◽  
Michaela Wilhelm
Keyword(s):  
Ethylene Glycol ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Poly Ethylene Glycol ◽  
Nickel Acetylacetonate ◽  
Glycol Methacrylate ◽  
Poly Ethylene

High surface area SiC(O)‐based ceramic by pyrolysis of poly (ethylene glycol) methacrylate‐modified polycarbosilane

2019 ◽  
Vol 102 (12) ◽  
pp. 7187-7197 ◽  
Author(s):  
Sarabjeet Kaur ◽  
Simon Fischer ◽  
Jens Falta ◽  
Kurosch Rezwan ◽  
Michaela Wilhelm
Keyword(s):  
Ethylene Glycol ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Poly Ethylene Glycol ◽  
Glycol Methacrylate ◽  
Poly Ethylene

scholarly journals Influence of Structure-Directing Additives on the Properties of Poly(methylsilsesquioxane) Aerogel-Like Materials

Gels ◽  
2019 ◽  
Vol 5 (1) ◽  
pp. 6 ◽  
Author(s):  
Marta Ochoa ◽  
Alyne Lamy-Mendes ◽  
Ana Maia ◽  
António Portugal ◽  
Luísa Durães
Keyword(s):  
Specific Surface ◽  
Bulk Density ◽  
Surface Area ◽  
Specific Surface Area ◽  
High Porosity ◽  
Poly Ethylene Glycol ◽  
Optimum Amount ◽  
Molar Ratios ◽  
Fine Control ◽  
Poly Ethylene

The effect of glycerol (GLY) and poly(ethylene glycol) (PEG) additives on the properties of silica aerogel-like monoliths obtained from methyltrimethoxysilane (MTMS) precursor was assessed. The tested molar ratios of additive/precursor were from 0 to 0.1 and the lowest bulk densities were obtained with a ratio of 0.025. When a washing step was performed in the sample containing the optimum PEG ratio, the bulk density could be reduced even further. The analysis of the material’s microstructure allowed us to conclude that GLY, if added in an optimum amount, originates a narrower pore size distribution with a higher volume of mesopores and specific surface area. The PEG additive played a binder effect, leading to the filling of micropores and the appearance of large pores (macropores), which caused a reduction in the specific surface area. The reduction of the bulk density and the microstructural changes in the aerogels induced by adding a small amount of these additives confirm the possibility of fine control of properties of these lightweight materials. The achieved high porosity (97%) and low thermal conductivity (~35 mW·m−1·K−1) makes them suitable to be used as thermal insulators.

Nanocomposite polymer electrolytes based on poly(poly(ethylene glycol)methacrylate), MMT or ZSM-5 formulated with LiTFSI and PYR11TFSI for Li-ion batteries

RSC Advances ◽  
2016 ◽  
Vol 6 (9) ◽  
pp. 7249-7259 ◽  
Author(s):  
J. Cardoso ◽  
A. Mayrén ◽  
I. C. Romero-Ibarra ◽  
D. P. Nava ◽  
J. Vazquez-Arenas
Keyword(s):  
Ethylene Glycol ◽  
Polymer Electrolytes ◽  
Li Ion Batteries ◽  
Poly Ethylene Glycol ◽  
Glycol Methacrylate ◽  
Nanocomposite Polymer ◽  
Li Ion ◽  
Nanocomposite Electrolytes ◽  
Poly Ethylene ◽  
Nanocomposite Polymer Electrolytes

Novel poly(poly(ethylenglycol)methacrylate) nanocomposite electrolytes based on montmorillonite and zeolite; and functionalized with LiTFSI and PYR11TFSI are synthetized for Li-ion batteries.

scholarly journals Synthesis of Spherical Silica by Sol-Gel Method and Its Application as Catalyst Support

2011 ◽  
Vol 10 (2) ◽  
pp. 25
Author(s):  
Anirut Leksomboon ◽  
Bunjerd Jongsomjit
Keyword(s):  
Particle Size ◽  
Ethylene Glycol ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Sol Gel ◽  
Weight Ratio ◽  
Gel Method ◽  
Sol Gel Method ◽  
Spherical Silica

In this present study, the spherical silica support was synthesized from tetraethyloxysilane (TEOS), water, sodium hydroxide, ethylene glycol and n-dodecyltrimethyl ammonium bromide (C12TMABr). The particle size was controlled by variation of the ethylene glycol co-solvent weight ratio of a sol-gel method preparation in the range of 0.10 to 0.50. In addition, the particle size apparently increases with high weight ratio of co-solvent, but the particle size distribution was broader. The standard deviation of particle diameter is large when the co-solvent weight ratio is more than 0.35 and less than 0.15. However, the specific surface area was similar for all weight ratios ranging from 1000 to 1300 m2/g. The synthesized silica was spherical and has high specific surface area. The cobalt was impregnated onto the obtained silica to produce the cobalt catalyst used for CO2 hydrogenation.</

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