Phase behavior of mesoporous nanostructures templated by amphiphilic crystalline–crystalline diblock copolymers of poly(ethylene oxide-b-ε-caprolactone)

Fabrication and Characterization of Inorganic Silver and Palladium Nanostructures within Hexagonal Cylindrical Channels of Mesoporous Carbon

“…To prepare the mesoporous carbon, we first used a simple ring-opening polymerization (ROP) to synthesize an amphiphilic diblock copolymer PEO-PCL, with a specific weight ratio of each segment (EO 114 CL 84 ; NMR M n = 14,600; PDI = 1.31) [5,6]. Next, we combined the EO 114 CL 84 , phenolic resin, and PEO-POSS at a unique weight ratio (EO 114 CL 84 :phenolic resin:PEO-POSS = 50:50:22) and subjected the mixture to EISA and calcination steps to fabricate an hexagonal cylindrical mesoporous phenolic resin [9].…”

“…Evaporation-induced self-assembly (EISA) has been developed aggressively as a strategy for the fabrication of mesoporous nanostructures because of its broad applicability to soft templating using various block copolymer templates [1][2][3][4][5][6][7][8][9][10][11][12]. Prior to its development, the pore sizes of mesoporous carbons were limited to approximately 5-10 nm as a result of the need for copolymer templates of low molecular weight [13,14].…”

Phase behavior of mesoporous silicas templated by the amphiphilic diblock copolymer poly(ethylene-b-ethylene oxide)

“…De-ionized water was used in all experiments. [39,42] Mesoporous silica was prepared through an EISA strategy in THF, using the copolymer PE-b-PEO as a template and TEOS as the silica precursor (Scheme 1). In a typical synthesis, a TEOS-to-PE-b-PEO ratio of 3.4, 5.6, 10, or 11 was used at a constant HCl concentration (0.012 g of 0.1 M HCl/PE-b-PEO) or a HCl (0.1 M)-to-PE-b-PEO ratio of 0.06, 0.12, 0.16, or 0.8 was used at constant TEOS amount of 1.0 g, the TEOS and HCl with specific composition was added into a 5 g of THF solution of PE-b-PEO (2.0 wt.%, containing 0.10 g of copolymer), with stirring, which was continued for 30 min to form a homogeneous solution.…”

“…Great advances in recent years [33][34][35][36][37][38][39][40][41][42] have made it possible to obtain highly controlled large-pore and highly stable mesostructured and mesoporous materials (silica, non-silica oxides, carbons), shaped as powders, films, monoliths, or aerosols. The hydrophilic-to-hydrophobic volume ratio is especially important when using nonionic surfactant templating systems to form a particular mesophase [43,44].…”

In Situ Monitoring of the Reaction‐Induced Self‐Assembly of Phenolic Resin Templated by Diblock Copolymers

“…In previous studies, we used evaporation‐induced self‐assembly (EISA), with double‐crystalline poly(ethylene oxide‐ block ‐ε‐caprolactone) (PEO‐ b ‐PCL) diblock copolymers as templates and HMTA as the crosslinking agent, to prepare a series of mesoporous phenolic resins . In these phenolic resin/PEO‐ b ‐PCL systems, we observed, using small‐angle X‐ray scattering (SAXS), transmission electron microscopy (TEM), differential scanning calorimetry (DSC), and Fourier transform infrared (FTIR) spectroscopy, an interesting relationship between the transformation of the mesophase and the degree of competitive hydrogen bonding.…”