Gas transport in metal organic framework–polyetherimide mixed matrix membranes: The role of the polyetherimide backbone structure

Hegde, Maruti; Shahid, Salman; Norder, Ben; Dingemans, TJ; Nijmeijer, DC Kitty

doi:10.1016/j.polymer.2015.11.002

Cited by 18 publications

(9 citation statements)

References 56 publications

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“…The expected increase in backbone flexibility of the 6FDA-D polymer may be compensated by the extra bulkiness of the CF 3 groups. A similar effect of dianhydride structure on the T g of nonbranched fully 20 and partially aromatic 28 polyimides was reported in the literature, with the exception of BPADA. A detailed DSC analysis ( Figure S3, Supporting Information ) shows the absence of melting or crystallization peaks thereby reflecting the amorphous nature of all of the polyimides in their state just after synthesis.…”

Section: Resultssupporting

confidence: 81%

“…That, in addition to very high transition temperatures, often higher than their decomposition temperatures, limits their usefulness for many applications . Flexible and bulky linkage groups are traditionally being introduced between aromatic rings in the dianhydride monomer , to enhance solubility, transparency, and processing. The goal of these modifications is to either disrupt their aromaticity (to prevent intramolecular conjugation) or to make the chains pack less efficiently (to prevent intermolecular CTC formation).…”

Section: Introductionmentioning

confidence: 99%

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Understanding the Effect of the Dianhydride Structure on the Properties of Semiaromatic Polyimides Containing a Biobased Fatty Diamine

Susa

Bijleveld

Santana

et al. 2017

ACS Sustainable Chem. Eng.

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In this work we report the effect of the hard block dianhydride structure on the overall properties of partially biobased semiaromatic polyimides. For the study, four polyimides were synthesized using aliphatic fatty dimer diamine (DD1) as the soft block and four different commercially available aromatic dianhydrides as the hard block: 4,4′-(4,4′-isopropylidenediphenoxy) bis(phthalic anhydride) (BPADA), 4,4′-oxidiphthalic anhydride (ODPA), 4,4′-(Hexafluoroisopropylidene) diphthalic anhydride (6FDA), and 3,3′,4,4′-biphenyltetracarboxylic dianhydride (BPDA). The polymers synthesized were fully organo-soluble thermoplastic branched polyimides with glass transition temperatures close to room temperature. The detailed analysis took into account several aspects of the dianhydrides structure (planarity, rigidity, bridging group between the phtalimides, and electronic properties) and related them to the results obtained by differential scanning calorimetry, rheology, fluorescence and broadband dielectric spectroscopy. Moreover, the effects of physical parameters (crystallization and electronic interactions) on the relaxation behavior are discussed. Despite the presence of the bulky branched soft block given by the dimer diamine, all polyimides showed intermolecular charge transfer complexes, whose extent depends on the electronic properties of the dianhydride hard block. Furthermore, the results showed that polyimides containing flexible and bulky hard blocks turned out fully amorphous while the more rigid dianhydride (BPDA) led to a nanophase separated morphology with low degree of crystallinity resulting in constrained segmental relaxation with high effect on its mechanical response with the annealing time. This work represents the first detailed report on the development and characterization of polyimides based on a biobased fatty dimer diamine. The results highlight the potential of polymer property design by controlled engineering of the aromatic dianhydride blocks.

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Section: Resultssupporting

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Understanding the Effect of the Dianhydride Structure on the Properties of Semiaromatic Polyimides Containing a Biobased Fatty Diamine

Susa

Bijleveld

Santana

et al. 2017

ACS Sustainable Chem. Eng.

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“…Gel permeation chromatography (GPC) is a direct method to determine the molecular weight of PAA, while the intrinsic viscosity of polyamic acid is a simple and effective method to characterize the molecular weight indirectly. In this article, we choose intrinsic viscosity of polyamic acid to compare the molecular weight.…”

Section: Resultsmentioning

confidence: 99%

Effect of molecular rigidity and hydrogen bond interaction on mechanical properties of polyimide fibers

Yan

Luo

Huang

et al. 2016

J of Applied Polymer Sci

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Six kinds of polyimide (PI) fibers with different molecular rigidity and hydrogen bond interactions were designed and prepared in order to investigate the relationship between structure and mechanical properties. The rigidity, aggregation structure, fracture morphology, hydrogen bond, and charge transfer (CT) interactions were investigated in detail. Conformational rigidity of six PI fibers were simulated and measured by D-values of energy barrier and bottom in potential energy curves of PI units. Rigid rodlike PI macromolecules tend to pack in order and show better mechanical properties. However, with the increase of D-values, fracture mechanisms change from ductile fracture to brittle fracture. Brittle fracture resulting from high conformational rigidity is adverse to improvement of mechanical properties of PI fibers. Besides, strength of hydrogen bond and CT interactions are characterized by infrared spectroscopy and ultraviolet absorption spectra, respectively. The results indicate that higher interactions lead to higher tensile strength and initial modulus. Finally, PI fibers, which possess moderate conformational rigidity and strong hydrogen bond interactions, exhibit highest tensile strength (1.82 GPa) and initial modulus (85.7 GPa) in six kinds of PI fibers.

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“…Although various * Corresponding author. attempts have been devoted to improving the separation performance of promising polymer membranes [5,6], the implementation of polymeric membranes for large-scale industrial high-throughput gas separation processes, however, is still limited, as the majority of the developed polymer membranes have yet to meet the industrial performance stan dards due to insufficient durability and mechanical stability under actual gas separation conditions and the trade-off between permeability and selectivity [7,8]. For example, the major drawbacks of commercially available glassy polymer membranes (e.g.…”

Section: Introductionmentioning

confidence: 99%

Hierarchical ZIF-8 composite membranes: Enhancing gas separation performance by exploiting molecular dynamics in hierarchical hybrid materials

Shahid

Baron

Denayer

et al. 2021

Journal of Membrane Science

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Hierarchical ZIF-8 Mixed matrix membranes Gas separation PolyimideMixed matrix membranes (MMM) incorporating metal-organic framework (MOF) fillers have gained increasing attention in addressing environmental and sustainability challenges. Hierarchical materials combining pore sizes of different length scales are expected to facilitate molecular diffusion and mass transfer for the optimization of catalysis and separation processes. Herein, a novel preparation method for hierarchical ZIF-8 (H-ZIF-8) particles is presented for the synthesis of polyimide (PI)-based MMMs with good compatibility between filler and polymer. Gas permeability measurements of polyimide-Matrimid®/H-ZIF-8 MMMs showed 4-fold improvements in permeability of both CO 2 and CH4 coupled with a marked increase in selectivity and plasticization resistance for MMM with 30 wt% H-ZIF-8 loading. Gas nanspon analysis in these MMMs revealed that the enhanced gas separation performance of the MMMs can be related to the imidazolate modification of the PI structure and the hierarchical structure of H-ZIF-8, as confirmed by N 2 , Ar, mercury porosimeuy, SEM, TEM analysis. CO 2 permeability for all MMMs increases with increasing CO2 concentration and by decreasing temperarure. The proof of concept, as demonstrated in this study, could be extended for the preparation of other hierarchical ZIFs and related MMMs.

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Gas transport in metal organic framework–polyetherimide mixed matrix membranes: The role of the polyetherimide backbone structure

Cited by 18 publications

References 56 publications

Understanding the Effect of the Dianhydride Structure on the Properties of Semiaromatic Polyimides Containing a Biobased Fatty Diamine

Understanding the Effect of the Dianhydride Structure on the Properties of Semiaromatic Polyimides Containing a Biobased Fatty Diamine

Effect of molecular rigidity and hydrogen bond interaction on mechanical properties of polyimide fibers

Hierarchical ZIF-8 composite membranes: Enhancing gas separation performance by exploiting molecular dynamics in hierarchical hybrid materials

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