Crosslinking polyimides for membrane applications: A review

Vanherck, Katrien; Koeckelberghs, Guy; Vankelecom, Ivo F.J.

doi:10.1016/j.progpolymsci.2012.11.001

Cited by 496 publications

(320 citation statements)

References 115 publications

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“…229 Especially polyimides and polyamideimides turned out to be promising pervaporation membrane materials because of high separation performance, low swelling and excellent thermal, chemical and mechanical stability. [230][231][232] A pioneering role in the development of zeolite Na-LTA zeolite membranes for the dehydration of bio-ethanol was played by Bussan Nanotech Research Institute Inc. (BNRI), Japan, a Member of the Mitsui Holding, which developed a process for the production of fuel-grade ethanol by a hybrid distillation/vapor permeation process. 233,234 240,241 came into the focus.…”

Section: Progress In Industrial Application Of Zeolite Membranesmentioning

confidence: 99%

Zeolite membranes – a review and comparison with MOFs

et al. 2015

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aThe latest developments in zeolite membranes are reviewed, with an emphasis on the synthesis techniques, including seed assembly and secondary growth methods. This review also discusses the current industrial applications of zeolite membranes, the feasibility of their use in membrane reactors and their hydrothermal stability. Finally, zeolite membranes are compared with metal-organic framework (MOF) membranes and the latest advancements in MOF and mixed matrix membranes are highlighted.

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Section: Progress In Industrial Application Of Zeolite Membranesmentioning

confidence: 99%

Zeolite membranes – a review and comparison with MOFs

et al. 2015

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“…Besides, the method is useful to improve the membrane stability and to reduce undesirable phenomena, such as physical aging 17 and plasticization 18 , which have a crucial impact on membrane durability. 11,19,20 This work examines the effect of UV irradiation on the gas transport properties of two glassy amorphous poly(ether ether ketone)s (PEEKs) lms based on diuorobenzophenone (DFB) and 3,3 0 ,5,5 0 -tetramethyl-4,4 0 -dihydroxybiphenyl (TMBP) or 2,2 0 ,3,3 0 ,5,5 0 -hexamethyl-4,4 0 -dihydroxybiphenyl (HMBP). The monomers derived from bisphenol were chosen because the methyl groups reduce the efficiency of polymer chain packing, thereby increasing gas permeability and, moreover, they provide an abundant source of benzylic methyl groups for crosslinking reactions.…”

Section: -7mentioning

confidence: 99%

Aromatic poly(ether ether ketone)s capable of crosslinking via UV irradiation to improve gas separation performance

et al. 2017

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The effect of UV-crosslinking on the gas transport properties of two poly(ether ether ketone)s derived from difluorobenzophenone and two bisphenol derivatives, with four (TMBP-DFB) or six (HMBP-DFB) methyl groups, has been studied. The crosslinking reaction was conducted on dense membranes, using polychromatic light, with wavelengths higher than 350 nm, at room temperature and in presence of air.Both polymers were able to produce crosslinked membranes, with gel fractions close to 75%, but a shorter irradiation time was required for HMBP-DFB. A DFT quantum mechanical study has stated that HMBP-DFB radical formation is much easier than for TMBP-DFB, which would support the fastest kinetics of the crosslinking process for HMBP-DFB. The crosslinked membranes have shown greatly improved gas transport properties, especially for the O 2 /N 2 gas pair, where the Robeson upper bound line of 1991 was clearly surpassed. The improvement in selectivity has been ascribed to the better molecular-sieving characteristics of crosslinked membranes.

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“…Polyimides (PIs) have extraordinary characteristics such as excellent mechanical and chemical properties, and outstanding thermal stability, so that they are being widely applied as matrix materials for the advanced applications [9][10][11]. However, pure PIs only have a low dielectric constant which could limit their applications in electronics [12,13].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Pure Organic Dielectric Composites for Capacitors

Mao

Zhang

et al. 2018

MATEC Web Conf.

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Abstract. This work reports the excellent dielectric composites were prepared from polyimide (PI) and poly(vinylidene fluoride) (PVDF) via solution blending and thermal imidization or chemical imidization. The dielectric and thermal properties of the composites were studied. Results indicated that the dielectric properties of the composites synthesized by these two methods were enhanced through the introduction of PVDF, and the composites exhibited excellent thermal stability. Compared to the thermal imidization, the composites prepared by chemical imidization exhibited superior dielectric properties. This study demonstrated that the PI/PVDF composites were potential dielectric materials in the field of electronics.

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Crosslinking polyimides for membrane applications: A review

Cited by 496 publications

References 115 publications

Zeolite membranes – a review and comparison with MOFs

Zeolite membranes – a review and comparison with MOFs

Aromatic poly(ether ether ketone)s capable of crosslinking via UV irradiation to improve gas separation performance

Preparation and Characterization of Pure Organic Dielectric Composites for Capacitors

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