Structure–gas transport property relationships of poly(dimethylsiloxane–urethane) nanocomposite membranes

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

“…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.…”

“…A similar trend has been observed by Madhavan and Reddy 49 Madhavan and Reddy. 16 In addition, the T g observed was single and suggesting that the polymers were not phase Consequently the diffusion of gas also decreased substantially after the incorporation of POSS into the polyamide. …”

“…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.…”

POSS/Polyurethane Hybrids and Nanocomposites: A Review on Preparation, Structure and Performance

“…Permeability measurements showed that the permeability of N 2 and O 2 gases decreased with the increase of pressure (Figures 17, 18). 78 Bliznyuk et al 79 synthesized POSS by the hydrolytic condensation of the product of the interaction of 3-aminopropyl triethoxysilane with a twofold molar excess of glycidol. Then the POSS was incorporated in polyurethane to get POSS/PU hybrids.…”

Synthesis, morphology and thermal properties of the POSS-containing polyurethane nanocomposites

“…Polyurethanes (PUs) are often used as polymer matrices for nanocomposites preparation due to their wide variety of physical and chemical properties [6][7][8][9]. The incorporation of polyhedral oligomeric silsesquioxane (POSS) macromer into the polyurethane matrix was found results in improving of the permeability of gas transport [10], increasing of the conduction and the permittivity [11]. The addition of POSS into the PU's polymers leads to enhancement of their thermal stability [12,13], also to improving of the mechanical properties [14,15] due to the reinforcement effect of the nanoparticles.…”