Adsorption properties of phenolic resin-based mesoporous carbons obtained by using mixed templates of Pluronic F127 and Brij 58 or Brij 78 polymers

Abstract

Phenolic resin-based mesoporous carbons were synthesized by using mixed templates of Pluronic F127 and Brij 58 or Brij 78. For the purpose of comparison three samples of nanoporous carbons were prepared by using single templates of Pluronic F127, Brij 58 and Brij 78 polymers, respectively. Adsorption properties of the aforementioned carbons were studied by nitrogen adsorption at −196°C. The resulting carbons featured high specific surface areas ranging from 641 m 2 /g for the sample obtained in the presence of Brij 58 polymer to 825 m 2 /g for the carbon prepared by using a mixed template containing 23% of Pluronic F127 and 77% of Brij 58 and from 588 m 2 /g for the sample obtained in the presence of Brij 78 polymer to 813 m 2 /g for the carbon prepared by using Pluronic F127 only. It was shown that the width of mesopores increases with increasing amount of Brij 58 or Brij 78 in the mixture of one of these polymers with Pluronic F127, suggesting that Brij polymers act also as micelle expanders.

Carbon Materials for Chemical Capacitive Energy Storage

“…By utilizing lab‐made diblock copolymer PEO 125 ‐ b ‐PMMA 144 and PEO 125 ‐ b ‐PS 230 , mesoporous carbons with pore sizes of 10.5 and 23.0 nm have been obtained 84g, 96. Large pore mesoporous carbons can also be obtained under acidic conditions by using resorcinol‐formaldehyde and blend templates of F127 and polyoxyethylene (20) cetyl ether (C 156 H 433 EO 20 , Brij 58), and polyoxyethylene (20) stearyl ether (C 18 H 37 EO 20 ‐OH, Brij 78) 97. By changing the ratios of Brij 58 and Brij 78 to F127, the mesopores could further be enlarged from 4 to 8 nm, as well as the average size and amounts of micropores 97…”

Nanostructured mesoporous carbons: Tuning texture and surface chemistry

“…Some advances have been achieved by using mixtures of Pluronics® [85,87,94,95] since the size of the micelles depends on the length of the PPO hydrophobic segment of the…”

Enlarged Pore Size in Mesoporous Silica Films Templated by Pluronic F127: Use of Poloxamer Mixtures and Increased Template/SiO2 Ratios in Materials Synthesized by Evaporation-Induced Self-Assembly

“…Seeing that Pluronic surfactants can form mixed micelles, 39-41 binary blends of Pluronic surfactants have been successfully used to vary pore size in a range between that obtained with pure mesophases of either surfactant (keeping the total mass of template constant), [42][43][44] and that the pore size of mesoporous carbon templated by F127 can be increased by the addition of Brij non-ionic surfactants, 45 we 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 7 hypothesized that large-pore mesoporous silica films could be synthesized using EISA with the template F127 and the addition of a chemically similar secondary Pluronic polymer that functions as a SA, without inducing phase separation. Our results confirm this hypothesis, with a ca.…”