Poly(dimethylsiloxane-urethane) membranes: effect of linear siloxane chain and caged silsesquioxane on gas transport properties

Madhavan, KT; Gnanasekaran, Dhorali; Reddy, Boreddy S. R.

doi:10.1007/s10965-011-9592-8

Cited by 21 publications

(10 citation statements)

References 30 publications

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“…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.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2015

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Abstract:A series of bio-nanocomposite membranes based on different loadings of polyhedral oligomeric silsesquioxane (POSS) and dimer fatty acid polyamide was prepared by facile solution casting method and their gas-transport properties were evaluated using oxygen, Considerable influence of POSS on the glass transition temperature of the bio-nanocomposite membranes was observed. Increasing the POSS content decreased the free volume and increased the density of the membranes. These properties can be used to determine the permeability and selectivity of the membranes prepared.

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Section: Introductionmentioning

confidence: 99%

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

et al. 2015

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“…2. The composites show a broad peak at about 2θ = 20°, which is the diffraction peak due to PU amorphous phase [35,36]. According to Waddon and Coughlin's results, POSS can be considered as spheres packing hexagonally.…”

Section: Crystal Structuresmentioning

confidence: 97%

Polyurethane/polyhedral oligomeric silsesquioxane shape memory nanocomposites with low trigger temperature and quick response

Jin

Liu

2015

J Polym Res

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Ester-based polyurethane (PU) was found to have excellent shape memory properties with low trigger temperature. Polyhedral oligomeric silsesquioxanes (POSS) have drawn considerable interest due to their hybrid organic-inorganic structures consisting of a silica cage surrounded by eight organic groups. Incorporation of functional POSS in polymers normally improves the mechanical properties of polymer matrix. For the purpose of obtaining shape memory materials with low trigger temperature and quick response, octa(3-hydroxypropyl) polyhedral oligomeric silsesquioxane (POSS-(OH) 8 ) was incorporated into polyurethane by solution casting. The chemical structures and microstructures were characterized by Fourier transform infrared spectroscopy (FTIR), wide-angle X-ray diffraction (WAXD) and field emission scanning electron microscope (FESEM). The thermal properties and dynamic mechanical properties were investigated by differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA). The mechanical properties were also evaluated. Shape memory properties were characterized by cyclic thermal mechanical tests and physical shape recovery tests. The results show that the nanocomposites with low POSS-(OH) 8 loading content (1 and 3 wt.%) possess higher breaking strength and elastic modulus, resulting in higher shape fixity, recovery ratios and faster recovery. The nanocomposites might have potential applications for controlling tags or proof marks in the area of low temperature storage.

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“…The second part of porosity could be attributed to the nanoporosity of the POSS core had a diameter of 0.54 nm in a POSS cage. Madhavan et al 70 studied the surface effect of poly (dimethylsiloxane) (PDMS) or polypropylene glycol (PPG) linear chain and polyoctahedral oligosilsesquioxanes (POSS) cubic nanoparticles and the gas transport properties of PDMS-PU or PPG-PU hybrid membranes. The gas permeability of amino-POSS incorporated hybrid membranes was in the order of CO 2 > O 2 > N 2 .…”

Section: Amino-possmentioning

confidence: 99%

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

Diao¹,

Mao²,

Zhang³

et al. 2015

Elastomers and Composites

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Polyhedral oligomeric silsesquioxane (POSS) is an important inorganic-organic hybrid material with a threedimensional structure. Polyurethane (PU) is a widely applied polymer that has versatile properties with the change of two phase structure. When POSS is incorporated into PU by physical or chemical methods, many properties can be greatly improved, such as mechanical properties, thermal stability, biodegradation resistance, and water resistance. This paper reviews the recent progress in preparation, structure, and performance of POSS-modified polyurethane from the viewpoint of physical blending and chemical modification.

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Poly(dimethylsiloxane-urethane) membranes: effect of linear siloxane chain and caged silsesquioxane on gas transport properties

Cited by 21 publications

References 30 publications

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

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

Polyurethane/polyhedral oligomeric silsesquioxane shape memory nanocomposites with low trigger temperature and quick response

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

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