Template‐assisted hydrophobic porous silica membrane: A purifier sieve for organic solvents

Abstract

Self‐supporting, interconnected, porous inorganic (silicon/carbon) membranes were obtained by the calcination of composite membranes at 900 °C with a porous polymer template obtained by binary‐phase solid‐state photopolymerization at −60 °C with acrylate monomers followed by chemical vapor deposition. The physicochemical properties of all of the membranes were characterized by scanning electron microscopy, energy‐dispersive spectroscopy (EDS), Fourier transform infrared (FTIR) spectroscopy, X‐ray powder diffraction (XRD), thermogravimetric analysis (TGA), and the measurement of water contact angles, water uptake, and percentage of porosity. The membranes showed contact angles ranging from 127 to 130 ± 0.5°, which were close to those of superhydrophobicity. The EDS, FTIR spectroscopy, XRD, and TGA results confirmed the formation of the Si–C composite structure after calcination and an increase in the thermal stability. The polymer and composite membranes were found to be hydrophilic, whereas Si–C was hydrophobic. The poly(ethylene glycol) diacrylate derived Si–C membrane showed a good absorption efficiency for tinted toluene from water compared to the others. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45822.

Additive manufacturing of LiNi1/3Mn1/3Co1/3O2 battery electrode material via vat photopolymerization precursor approach

“…The presence of NMC precursors made a significant change in the thermal decomposition of this printed piece, as previously reported in thermal studies of composite PEGDA resins 29 , 31 . Figure 2 b shows that the primary thermal decomposition occurred between 40 and 400 °C, leaving only 15.3% of residues, in good agreement with what was expected from the synthesis reaction of NMC 111 according to the following stoichiometric Eq.…”

Binary phase solid‐state photopolymerization behavior of acrylate cryogels under different light sources

“…The maximum absorbance of water was recorded in L‐1 and a lower one in M‐2. The higher water absorption properties in L‐1 are due to the higher miscibility of HEA than HEMA monomer with solvent, which resulted in excellent crosslinking ability, a higher percentage of porosity, and larger pore size, results that are consistent with the SEM images (Figure ).…”

Carbon Dioxide Captured on a Wet Si−C Composite Material with a Surfactant‐derived Carbon Film

“…The hydroxyl groups on the surface of the SBA‐15 are covered by carbon molecules and reduce the binding effect on water molecules, greatly increasing the contact area between water molecules and CO 2 molecules, which is more conducive to the formation of CO 2 hydrates. Essentially, the realization of the surface hydrophobicity of the Si−C composite material greatly enhances the CO 2 capture capacity [18] . However, due to the decrease in pore size, the capillary force is increased, the activity of water is reduced, and the gas diffusion is affected so that the generated pressure of CO 2 hydrate formation is also slightly increased.…”

“…Essentially, the realization of the surface hydrophobicity of the SiÀ C composite material greatly enhances the CO 2 capture capacity. [18] However, due to the decrease in pore size, the capillary force is increased, the activity of water is reduced, and the gas diffusion is affected so that the generated pressure of CO 2 hydrate formation is also slightly increased. The ChemistrySelect pore structure parameters and the CO 2 capture capacity of different wet porous materials in kinds of literature are shown in Table 1.…”