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Cited by 39 publications
(18 citation statements)
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“…Although the dense packing strengthens the polymer structure, it leads to low gas permeability, a disadvantage in gas separation applications . To improve permeability, many researchers have studied modification of the functional groups on the polymer backbone, branch to increase the free volume between polymer chains, surface modification, and polymer blends …”
Section: Introductionmentioning
confidence: 99%
“…11,[13][14][15] To improve permeability, many researchers have studied modification of the functional groups on the polymer backbone, branch to increase the free volume between polymer chains, surface modification, and polymer blends. 11,[14][15][16][17][18][19] The purpose of this study was to develop a new PBI separation membrane with improved gas permeability, specifically oxygen permeability, for application in OBIGGS. This was achieved using a monomer that could form a structure similar to that of polymers with intrinsic microporosity (PIMs), leading to large free volume.…”
Section: Introductionmentioning
confidence: 99%
“…Several approaches have been taken to enhance PBI membrane permeability including polymer blending, 24 structural modification, 25,26 chemical cross-linking, 27,28 thermal rearrangement 29 and incorporation of fillers. 2,30,31 Besides freestanding PBI membranes, asymmetric PBI membranes in the configuration of flat sheets and hollow fibers 8,25,30,32 have been unveiled, prepared by phase inversion. Despite great achievements made in the development of thin PBI membranes, coating of an additional layer of silicone rubber was always applied to heal the defects and compensate the low processability of PBI.…”
Section: Introductionmentioning
confidence: 99%
“…The higher physicochemical stability was attributed mainly to the entire covalent bonding nature of polymers as compared to MOFs (Dawson et al 2011) and therefore can be considered seriously for CO 2 adsorption at elevated pressures. PBI has been considered as one of the best HP polymers (Klaehn et al 2011) which has very high thermal stability, mechanically robust molecular nature and tunable mesoporous structure (Lobato et al 2010;Kumbharkar and Li 2012). Recent simulation study on pre-combustion CO 2 has suggested that PBI based membrane is more advantageous than commonly used Selexol TM CO 2 capture process due to the lower regeneration energy cost ).…”
Section: Introductionmentioning
confidence: 99%
“…5 Solvents including polyphosphoric acid (PPA), N,N-dimethylacetamide (DMAc), N-methylpyrrolidone (NMP), and N,N-dimethylformamide (DMF) are commonly used, PPA is used most often because it can absorb water, a by-product of the reaction; with other solvents, toluene must be used to achieve azeotropic dehydration. 6,7 PBI fibers have been produced by dry spinning, 8,9 wet spinning, 10 dry-wet spinning, 11 and electrospinning. 12,13 In dry spinning, the DMAc evaporates when the solution enters the heated, inert atmosphere after exiting the spinneret 8 and potentially could be a source of pollution.…”
Section: Introductionmentioning
confidence: 99%