Cost effective poly(urethane-imide)-POSS membranes for environmental and energy-related processes

Gnanasekaran, Dhorali; Reddy, B. S. R.

doi:10.1007/s10098-012-0500-7

Cited by 15 publications

(16 citation statements)

References 20 publications

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“…Due to these unique characteristics, several attempts have demonstrated that embedding POSS in polymer matrices resulted in improved gas separation performance. Among these studies, only few studies employed POSS as filler for CO 2 separation, as summarized in Table 1 [32, [35][36][37][38][39]. Since the incorporation of POSS may increase the fractional free volume and/or interactions between POSS and CO 2 , permeability increases due to the enhanced free volume and/or solubility.…”

Section: A C C E P T E D Introductionmentioning

confidence: 99%

Suppression of aging and plasticization in highly permeable polymers

Yong

Kwek

Liao

et al. 2015

Polymer

124

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Section: A C C E P T E D Introductionmentioning

confidence: 99%

Suppression of aging and plasticization in highly permeable polymers

Yong

Kwek

Liao

et al. 2015

Polymer

124

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“…It was however, observed that at high POSS content, the increasing order of CO 2 permeability was slightly reduced with pressure, due to the restriction of interaction in the CO 2 with membrane matrix, caused by the presence of POSS aggregates. 23 Table 4 shows the results of permselectivity studies of bio-nanocomposite membranes with different loadings of POSS and penetrant"s pressure. For example, for neat polyamide membrane, the selectivity obtained at 1 bar was 2.03 for P(O 2 )/P(N 2 ) and 10.37for 26 P(O 2 )/P(N 2 ),and at 4 bar was 2.14 for P(O 2 )/P(N 2 ) and 11.20 for P(CO 2 )/P(N 2 ).…”

Section: 8pressure Dependency Of Permeability Of Bio-nanocompositementioning

confidence: 99%

“…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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“…The ability to selectively remove one component in a mixture while rejecting others describes the perfect separation device [ 7 ]. Various materials and methods are being developed for capture and storage, and in some cases, conversion, to mitigate the effect of global warming.…”

Section: Introductionmentioning

confidence: 99%

CO2 Separation in Nanocomposite Membranes by the Addition of Amidine and Lactamide Functionalized POSS® Nanoparticles into a PVA Layer

et al. 2018

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In this article, we studied two different types of polyhedral oligomeric silsesquioxanes (POSS®) functionalized nanoparticles as additives for nanocomposite membranes for CO2 separation. One with amidine functionalization (Amidino POSS®) and the second with amine and lactamide groups functionalization (Lactamide POSS®). Composite membranes were produced by casting a polyvinyl alcohol (PVA) layer, containing either amidine or lactamide functionalized POSS® nanoparticles, on a polysulfone (PSf) porous support. FTIR characterization shows a good compatibility between the nanoparticles and the polymer. Differential scanning calorimetry (DSC) and the dynamic mechanical analysis (DMA) show an increment of the crystalline regions. Both the degree of crystallinity (Xc) and the alpha star transition, associated with the slippage between crystallites, increase with the content of nanoparticles in the PVA selective layer. These crystalline regions were affected by the conformation of the polymer chains, decreasing the gas separation performance. Moreover, lactamide POSS® shows a higher interaction with PVA, inducing lower values in the CO2 flux. We have concluded that the interaction of the POSS® nanoparticles increased the crystallinity of the composite membranes, thereby playing an important role in the gas separation performance. Moreover, these nanocomposite membranes did not show separation according to a facilitated transport mechanism as expected, based on their functionalized amino-groups, thus, solution-diffusion was the main mechanism responsible for the transport phenomena.

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Cost effective poly(urethane-imide)-POSS membranes for environmental and energy-related processes

Cited by 15 publications

References 20 publications

Suppression of aging and plasticization in highly permeable polymers

Suppression of aging and plasticization in highly permeable polymers

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

CO2 Separation in Nanocomposite Membranes by the Addition of Amidine and Lactamide Functionalized POSS® Nanoparticles into a PVA Layer

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