Nanostructured poly(benzimidazole) membranes by N-alkylation

Dominguez, Pablo Haro; Grygiel, Konrad; Weber, Jens

doi:10.3144/expresspolymlett.2014.4

Cited by 15 publications

(5 citation statements)

References 26 publications

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“…This is generally associated with a crystallization of the polymer backbone (intercrystalline domains). − At high q values of 0.25 Å –1 , a characteristic peak appears when adding the PIL to the host polymer. This is attributed to side-chain aggregation (cluster domain) and corresponds to the size of the hydrophilic channels. ,,, The ionomer peak shifts from 0.258 to 0.206 Å –1 when increasing the PIL content (from 54 to 74 mol %) and the characteristic size of the cluster domain changes from 2.434 to 3.048 nm as expected; see Table . The peak becomes less recognizable for the samples, 70 mol %–1:1 and 74 mol %–1:1.…”

Section: Resultssupporting

confidence: 64%

Tuning Polybenzimidazole Membrane by Immobilizing a Novel Ionic Liquid with Superior Oxygen Reduction Reaction Kinetics

et al. 2022

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Protic ionic liquid (PIL) is a promising nonaqueous electrolyte alternative to replacing phosphoric acid for fuel cells operating at temperatures above 100 °C. In this study, the physical and electrochemical properties of stoichiometric and nonstoichiometric PILs are investigated focusing on their acid/base ratio. The study involves a series of PILs, generically indicated as N,N-diethyl-3-sulfopropane-1-ammonium trifluoromethanesulfonate ([DESPA + ][TfO − ]), varying from an excess of the proton acceptor (N,N-diethyl-3-aminopropane-1-sulfonic acid) to an excess of the proton donor (trifluoromethanesulfonic acid, TfOH). Compared to a state-of-the-art electrolyte, i.e., concentrated phosphoric acid, the nonstoichiometric [DESPA + ][TfO − ] shows superior oxygen reduction reaction kinetics on the investigated Pt catalysts and oxygen permeation abilitywith a base-to-acid molar ratio of 1:2 achieves a current density ∼10 times larger than that of concentrated phosphoric acid at 110 °C and 0.8 V. Membranes including polybenzimidazole as a host polymer and stoichiometric and nonstoichiometric [DESPA + ][TfO − ] as the conductive electrolyte exhibit promising properties in terms of thermal stability and conductivity. At 120 °C and 40% relative humidity, conductivities of 2 and 16 mS cm −1 are achieved by the membranes employing stoichiometric and excess acid [DESPA + ][TfO − ], respectively.

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Section: Resultssupporting

confidence: 64%

Tuning Polybenzimidazole Membrane by Immobilizing a Novel Ionic Liquid with Superior Oxygen Reduction Reaction Kinetics

et al. 2022

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“…14−17 Recently, this polymer has been modified to bear adenine motifs in appending chains and has been assessed for the removal of several families of DNA alkylating GTI agents in dichloromethane (DCM) solutions with good results. 18,19 In such previous reports, PBI was dissolved in dimethyl sulfoxide (DMSO) at high temperatures (>160 °C), ensuring its complete dissolution or/and mixing of reagents, 18,20 which led us to question if such heating step could have an effect on GTI adsorption, through induction of some structural or configurational features on PBI. Also, considering the chemical structure of unmodified PBI (Scheme 1), we decided to investigate in this work whether PBI adsorbers for GTIs could be developed using adequate thermal and/or pH conditioning.…”

Section: Introductionmentioning

confidence: 99%

Polybenzimidazole for Active Pharmaceutical Ingredient Purification: The Mometasone Furoate Case Study

Ferreira

Esteves

Carrasco

et al. 2019

Ind. Eng. Chem. Res.

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Active pharmaceutical ingredient (API) purity is of major concern for pharmaceutical companies and the medical community. Reaching ultralow limits of genotoxic impurities (GTIs), imposed by strict legislation, is often time consuming and economically challenging. Therefore, there is a call for efficient unit operations able to remove GTI with minimal API losses from the organic solvent postreactional streams. This study reports for the first time a new approach to improve the performance of polybenzimidazole (PBI), a solvent-stable polymer, to efficient GTI removal. Two families of GTIs are considered, and the discovery that the use of specific thermal and pH conditioning of PBI adsorbers improves GTI removal efficiency is reported. Electrospun fibers are explored, aiming at process versatility. Similar removals of GTI, more than 97%, are achieved with virtually no API loss.

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“…Elektrodiyaliz, yakıt hücreleri, ozmoz teknikleri, ultra nano filtrasyon ya da gaz ayrıştırmalarında genellikle yarı geçirgen olan PBI içi boş liflerinden elde edilen zar yapılar (membranlar) kullanılmaktadır [102,[121][122][123][124][125][126][127][128][129][130][131]. Genellikle asit yüklemesi yapılarak geçirgenliği arttırılan PBI liflerinin mekanik özelliklerinin korunması amacıyla, iyonik çapraz bağlı, kovalent çapraz bağlı ya da kompozit membran gibi çeşitli yöntemler geliştirilmiştir [52,[54][55].…”

Section: Pbi Membranlarunclassified

Polibenzimidazol (PBI) Lifleri

Kalayci¹,

Avinç²,

Yavaş³

2014

J Text Eng

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ÖZET: Polibenzimidazol (PBI) lifleri, yüksek termal ve kimyasal dayanıma sahip uzun zincirli aromatik bir polimer olan PBI polimerinden üretilmektedir. PBI lifleri; yüksek nem geri kazanımı, iyi tuşe ve dökümlülük gibi istenilen özelliklere sahiptir. İlk olarak koruyucu teknik tekstillerde kullanılan bu lifler, günümüzde tekstil ürünlerinin yanı sıra filtrasyon, yakıt hücresi ya da karbon yakalama sistemleri gibi tekstil alanı dışındaki çevre dostu uygulamalarda da sıkça kullanılmaktadır. Bu çalışmada, polibenzimidazol liflerinin üretimine, özellikle-rine ve kullanım alanlarına yer verilmiştir. POLYBENZIMIDAZOLE (PBI) FIBERSABSTRACT: Polybenzimidazole (PBI) fibers are produced from polybenzimidazole polymer which has a high thermal and chemical strength with a long chain aromatic structure. These fibers are first used in protective technical textile products due to their good moisture regain and textile performance properties like good hand and drape. Today, in addition to protective textile market, they are also used in environmental friendly applications such as filtration, fuel cell and carbon capture systems. In this review, production, properties and application areas of polybenzimidazole (PBI) fibers are discussed.

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Nanostructured poly(benzimidazole) membranes by N-alkylation

Cited by 15 publications

References 26 publications

Tuning Polybenzimidazole Membrane by Immobilizing a Novel Ionic Liquid with Superior Oxygen Reduction Reaction Kinetics

Tuning Polybenzimidazole Membrane by Immobilizing a Novel Ionic Liquid with Superior Oxygen Reduction Reaction Kinetics

Polybenzimidazole for Active Pharmaceutical Ingredient Purification: The Mometasone Furoate Case Study

Polibenzimidazol (PBI) Lifleri

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