Polyhedral oligomeric silsesquioxane-based fluoroimide-containing poly(urethane-imide) hybrid membranes: Synthesis, characterization and gas-transport properties

Polyhedral oligomeric silsesquioxane/polyamide bio-nanocomposite membranes: structure-gas transport properties

“…Similar observation was reported by Gnanasekaran et al 15 Madhavan and Reddy. As was observed in the AFM images, the distributions of POSS in PA chain showed …”

“…Similar decrease in the permeability (with increase in POSS concentration) was observed in POSS incorporated nanocomposite membranes (Maxwell"s effect). 15,16 Therefore, the observed permeability coefficients satisfy the correlations of permeability with FFV and density. These observations follow a regular trend and highly consistent with the observations reported on similar type of membrane.…”

“…These parameters can change the chain mobility and chain packing of polymer chains and determine the formation (and size) of the free volume and the magnitude of the density of such membranes. 15 FFV and density are the important factors that are related, directly, to the permeability of the membranes. Permeability of the bio-nanocomposite membranes evaluated under different pressures (1-4 bar) at 30 ºC is listed in Table 3.…”

“…11,12 Therefore, polyhedral oligomeric silsesquioxane (POSS) is of particular interest, mainly, in the preparation of membranes for gas separation operations. 9,[13][14][15][16][17][18][19][20][21][22][23][24] Unlike the common nanoparticles, POSS is very small (1-3 nm) and the chemistry of POSS is quite flexible. 25 POSS molecules embody a truly hybrid inorganic core/organic shell architecture that are naturally compatible with organic hosts, such as renewable resources 26,27 and natural biomaterials.…”

Application of polyhedral oligomeric silsesquioxane to the stabilization and performance enhancement of poly(4‐methyl‐2‐pentyne) nanocomposite membranes for natural gas conditioning

“…Polyhedral oligomeric silsesquioxane (POSS) nanoparticles are a class of organic, cagelike structures with an external organic group possessing the formula of [RSiO 1.5 ] n , where R can be various types of organic groups. Various kinds of POSSs, which are commercially available because of the diversity of functional groups, have been manipulated in the fabrication of nanocomposite membranes recently, and their effects on the thermal stability, performance, and structure of these membranes have been reported in the literature . Reinerth et al .…”