Formation and thermal stability of BMI-based interpenetrating polymers for gas separation membranes

Kurdi, J.; Kumar, Ashwani

doi:10.1016/j.memsci.2006.01.024

Cited by 26 publications

(27 citation statements)

References 44 publications

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“…The DSC thermogram of the cross-linked PEGDA is given as an inset. The T g of the pure polymers was similar to the reported values [19,28]. As can be seen from the Fig.…”

Section: Thermal Properties Of the Ipnssupporting

confidence: 87%

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Polyethylene glycol diacrylate and thermoplastic polymers based semi-IPNs for asymmetric membranes

Sundar

Kumar

2008

Composite Interfaces

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Abstract-Commercially available thermoplastic polymers were modified by forming semi Interpenetrated Polymer Networks (semi-IPNs) with poly(ethylene glycol) diacrylate (PEGDA). These semi-IPNs were used to prepare asymmetric flat sheet membranes. The successful formation of the semi-IPNs was confirmed by Fourier Transform Infra Red (FT-IR) spectroscopy. The property enhancement of the semi-IPN asymmetric membranes compared to commercial polymer was evaluated by characterizing thermal, morphological and gaseous permeation properties. The semi-IPNs showed two-step degradation pattern indicating the incorporation of polyethylene glycol moieties into the thermoplastic polymers. The thermal stability of all the membranes was above 360 • C indicating their suitability for high temperature applications. The presence of asymmetric morphology was confirmed by the scanning electron microscopy. Enhancement in gas permeation properties, particularly for the carbon dioxide transport, was observed for the synthesized semi-IPNs, over the pristine polymers. The semi-IPNs showed increase in selectivity and increase in CO 2 permeation when compared to the unmodified polymers. Among the three different polymers, poly(amide-imide) exhibited higher selectivity whereas the polysulfone showed higher permeation.

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“…The DSC thermogram of the cross-linked PEGDA is given as an inset. The T g of the pure polymers was similar to the reported values [19,28]. As can be seen from the Fig.…”

Section: Thermal Properties Of the Ipnssupporting

confidence: 87%

“…This might be due to the plasticization effect of the PEG. This kind of plasticization effect of one of the constituents in the semi-IPN was observed earlier [19]. This also proves the formation of IPNs of the polyimide and PEGDA.…”

Section: Thermal Properties Of the Ipnssupporting

confidence: 82%

Polyethylene glycol diacrylate and thermoplastic polymers based semi-IPNs for asymmetric membranes

Sundar

Kumar

2008

Composite Interfaces

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“…It was observed that BMI could be polymerized slowly inside and through PEI/NMP solutions at ambient conditions in the presence of ethyl alcohol [11][12][13]. The progress of polymerization was followed by measuring the viscosity, color change and spectroscopic analysis as discussed in details in our earlier work [11].…”

Section: Resultsmentioning

confidence: 99%

“…The chemical structures of the semiinterpenetrating polymer network of BMI-PEI have been analyzed by ATR-FTIR and XPS spectroscopy including the description of possible reactions as reported in our earlier work [11]. The BMI-PEI semi-IPN was found to be suitable for gaseous separations [13]. However, these new membranes were not investigated for natural gas, landfill leachate gas, O 2 -enriched air and GHG separation applications.…”

Section: Introductionmentioning

confidence: 99%

Performance of PEI/BMI semi-IPN membranes for separations of various binary gaseous mixtures☆

Kurdi

Kumar

2007

Separation and Purification Technology

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Synthesis of polyetherimide-bismaleimide (PEI-BMI) semi-interpenetrating polymer networks (semi-IPNs) combined with solvent phase inversion was used to prepare asymmetric flat membranes, which were coated with silicon rubber. These membranes were evaluated for production of O 2 -enriched air and separation of CO 2 from its mixture with CH 4 as well as with N 2 . Using different preparation schemes membranes with varying skin and supported layer characteristics were prepared. These different morphologies of membranes were responsible for a trade-off performance between gas permeance and permselectivity. These new composite, PEI-BMI semi-IPN membranes showed suitable performance for production of O 2 -enriched air and separation of CO 2 from natural gas or flue gas relevant to greenhouse gas emission control. Membrane performance was explained in terms of the intrinsic gas transport properties of the coated silicon layer and membrane glassy material, which determine the limitations of permeance-permselectivity trade-off. It was also found that the permselectivity for CO 2 over CH 4 or N 2 increases with increasing CO 2 feed concentration. This might be exploited to arrange for more cost-efficient multistage gas separation systems. Crown

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“…Our lab reported semi-IPN membranes having 15 times higher permeance than the parent polymers without a significant decrease in gas selectivity [20][21][22][23]. Recently we have reported the pure gas permeation studies based on semi-IPN membranes of commercially important glassy polymers and poly (ethylene glycol) diacrylate (PEGDa) [24,25].…”

Section: Introductionmentioning

confidence: 99%

Separation performance of asymmetric membranes based on PEGDa/PEI semi-interpenetrating polymer network in pure and binary gas mixtures of CO2, N2 and CH4

Sundar¹,

Dal‐Cin²,

Kumar³

et al. 2010

Journal of Membrane Science

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Formation and thermal stability of BMI-based interpenetrating polymers for gas separation membranes

Cited by 26 publications

References 44 publications

Polyethylene glycol diacrylate and thermoplastic polymers based semi-IPNs for asymmetric membranes

Polyethylene glycol diacrylate and thermoplastic polymers based semi-IPNs for asymmetric membranes

Performance of PEI/BMI semi-IPN membranes for separations of various binary gaseous mixtures☆

Separation performance of asymmetric membranes based on PEGDa/PEI semi-interpenetrating polymer network in pure and binary gas mixtures of CO2, N2 and CH4

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