Structure–gas transport property relationships of hexafluoroisopropylidene based poly(imide-siloxane)s

Srividhya, M.; Reddy, B. S. R.

doi:10.1016/j.memsci.2007.03.016

Cited by 14 publications

(6 citation statements)

References 40 publications

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“…The greater phase separation in the morphology of PPG‐based PU, compared to the other PCL‐, PDMS‐ and APPDMS‐based MSPUIs, is observed in AFM analysis. Similar observations were reported by Srividhya and Reddy . This reveals that the highly hydrophobic nature and low surface energy of POSS molecules mainly contribute to the formation of POSS aggregates on the surface of the hybrid membranes.…”

Section: Resultssupporting

confidence: 90%

A facile synthesis of mixed soft-segmented poly(urethane-imide)-polyhedral oligomeric silsesquioxone hybrid nanocomposites and study of their structure-transport properties

Gnanasekaran

Reddy

2013

Polym. Int.

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The structure-transport properties of mixed soft-segmented poly(urethane-imide) (MSPUI) membranes and their microstructures were investigated. Polypropylene glycol, polycaprolactone diol and bis(3-aminopropyl)-terminated polydimethylsiloxane were used as the soft segments in the membrane synthesis via a three-step polymerization reaction. The chemical structures of the MSPUI membranes were characterized using attenuated total reflectance Fourier transform infrared spectroscopy. Morphology and surface properties of the membranes were studied using scanning electron and atomic force microscopy techniques. Surface energy measurements indicated the enrichment of the hydrophobic soft segment in the membranes. The amorphous nature of the polymers was analysed using wide-angle X-ray diffraction. The effect of morphology on the permeability and selectivity of the membranes is discussed. Finally, membrane structure-transport property relationships were correlated.

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Section: Resultssupporting

confidence: 90%

A facile synthesis of mixed soft-segmented poly(urethane-imide)-polyhedral oligomeric silsesquioxone hybrid nanocomposites and study of their structure-transport properties

Gnanasekaran

Reddy

2013

Polym. Int.

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“…[113]. Thus, by increasing the percentage of SIDA content, TCE permeated more efficiently into the membranes.…”

Section: Fluorosilicones In Pervaporation Applicationmentioning

confidence: 90%

“…[113]. They found that the diffusion coefficient followed a different trend from permeability, as D(O 2 ) > D(CO 2 ) > D(N 2 ).…”

Section: )mentioning

confidence: 98%

“…Reddy et al prepared 6FDA-based several poly(imide-siloxane) (PIS) membranes and studied their gas permeation behavior for three different gases (e.g., N 2 , O 2 , and CO 2 ) [113]. Variable rigidity of the PI backbone was tailored using three different diamines: flexible siloxane containing diamine, diaminodiphenyl ether, and diaminodiphenyl sulfone (Scheme 6.26).…”

Section: )mentioning

confidence: 99%

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Fluorosilicones and Other Fluoropolymers

Mistri

Ghosh

Banerjee

2015

Handbook of Specialty Fluorinated Polymers

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“…To improve oxygen/nitrogen separation factor of polymeric membranes with high oxygen permeability coefficient but low oxygen/nitrogen separation factor, some attempts to introduce fluorine‐containing groups have been reported . For example, when trifluoropropyl groups or heptadecafluorodecyl groups were introduced into the side chains of the block copolymer of poly(tetramethyl‐ p ‐silphenylenesiloxane) and PDMS, oxygen permeability coefficient and oxygen/nitrogen separation factor simultaneously increased .…”

Section: Introductionmentioning

confidence: 99%

Oxygen‐enriching properties of a new hybrid membrane cross‐linked from PDMS and fluorine‐containing silicone resin

Zhang

Huang

Lin

et al. 2013

Polymer Engineering & Sci

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A fluorine‐containing silicone resin substituent group,vinyl group, and inorganic framework (SR‐FVI) was synthesized through hydrolytic condensation by using vinyltriethoxysilane, 13‐fluorooctyltriethoxysilane, tetraethoxysilane, and tetramethyldivinyldisiloxane as monomers. A new cross‐linked hybrid membrane (CHM) was prepared with the hydrogen‐containing silicone oil (HSO) as a cross‐linking agent, polydimethylsiloxane containing vinyl group and the SR‐FVI as matrix materials to enhance its membrane‐forming ability and permselectivity. The membrane‐forming process and the cross‐linking reactions between the silicon–hydrogen bond and the vinyl group were carried out simultaneously at room temperature. The effects of the SR‐FVI content in the CHMs, pressure difference, and temperature on the oxygen‐enriching properties were evaluated and discussed. A good equilibrium between membrane‐forming ability and oxygen‐enriching properties was attained, for example, oxygen permeability coefficient and ideal separation factor of the CHM with the SR‐FVI content of 50 wt% at 20°C and 0.10 MPa were 594 Barrer and 3.50, respectively. Compared to cross‐linked PDMS membranes without the SR‐FVI, the CHMs show better gas selectivity and similar gas permeability. The oxygen‐enriching property is attributed to the fluorine‐containing component in the CHM due to its good oxygen solubility. POLYM. ENG. SCI., 53:2328–2335, 2013. © 2013 Society of Plastics Engineers

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Structure–gas transport property relationships of hexafluoroisopropylidene based poly(imide-siloxane)s

Cited by 14 publications

References 40 publications

A facile synthesis of mixed soft-segmented poly(urethane-imide)-polyhedral oligomeric silsesquioxone hybrid nanocomposites and study of their structure-transport properties

A facile synthesis of mixed soft-segmented poly(urethane-imide)-polyhedral oligomeric silsesquioxone hybrid nanocomposites and study of their structure-transport properties

Fluorosilicones and Other Fluoropolymers

Oxygen‐enriching properties of a new hybrid membrane cross‐linked from PDMS and fluorine‐containing silicone resin

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