Hyperbranched polyester and its sodium titanate nanocomposites as proton exchange membranes for fuel cells

Ghanem, Ahmed; El–Gendi, Ayman; Rehim, Mona H. Abdel; El–Khatib, K.M.

doi:10.1039/c5ra27971b

Cited by 14 publications

(8 citation statements)

References 39 publications

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“…The assembly of the bulky hyperbranched structure and the linear structure protects the backbone and quaternary ammonium groups from the OH − attack through the steric hindrance effect. The result showed that chemically stable Q-PAES/PPO-XY blended membranes were obtained [ 31 , 33 , 55 ].…”

Section: Discussionmentioning

confidence: 99%

“…Novel hyperbranched anion exchange membranes (HBAEMs) are promising backbone structures for AEMs that have been reported to possess improved dimensional stability, alkaline stability, and clear micro-phase separation of hydrophilic/hydrophobic domains, which result in excellent ionic conductivity and high solubility enabling facile membrane fabrication and reprocessing compared to other polymers [ 29 , 30 , 31 , 32 ]. Ge et al [ 33 ] reported hyperbranched poly-4-(chloromethyl) styrene (HB-PVBC) AEMs with superior dimensional stability and an ionic conductivity of 123.01 mS cm −1 at 80 °C, which results from the well-separated hydrophilic/hydrophobic microphases and the low swelling ratio of HB-PVBC due to its hyperbranched structure.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced Hydroxide Conductivity and Dimensional Stability with Blended Membranes Containing Hyperbranched PAES/Linear PPO as Anion Exchange Membranes

et al. 2020

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A series of novel blended anion exchange membranes (AEMs) were prepared with hyperbranched brominated poly(arylene ether sulfone) (Br-HB-PAES) and linear chloromethylated poly(phenylene oxide) (CM-PPO). The as-prepared blended membranes were fabricated with different weight ratios of Br-HB-PAES to CM-PPO, and the quaternization reaction for introducing the ionic functional group was performed by triethylamine. The Q-PAES/PPO-XY (quaternized-PAES/PPO-XY) blended membranes promoted the ion channel formation as the strong hydrogen bonds interconnecting the two polymers were maintained, and showed an improved hydroxide conductivity with excellent thermal behavior. In particular, the Q-PAES/PPO-55 membrane showed a very high hydroxide ion conductivity (90.9 mS cm−1) compared to the pristine Q-HB-PAES membrane (32.8 mS cm−1), a result supported by the morphology of the membrane as determined by the AFM analysis. In addition, the rigid hyperbranched structure showed a suppressed swelling ratio of 17.9–24.9% despite an excessive water uptake of 33.2–50.3% at 90 °C, and demonstrated a remarkable alkaline stability under 2.0 M KOH conditions over 1000 h.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Enhanced Hydroxide Conductivity and Dimensional Stability with Blended Membranes Containing Hyperbranched PAES/Linear PPO as Anion Exchange Membranes

et al. 2020

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“…PES/PESAM lm was prepared by phase inversion method. 24 Particularly, equal weight ratio of the synthesized PESAM and PES were dissolved in NMP as a solvent. The polymer: solvent ratio was 20 : 80 and the polymers solution was le for 24 h under vigorous stirring.…”

Section: Preparation Of Polyethersulfone/hyperbranched Polyester Amidmentioning

confidence: 99%

Antifouling and antimicrobial polyethersulfone/hyperbranched polyester-amide/Ag composite

et al. 2020

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“…Membrane preparation with high selectivity and high permeability are necessary in the most applications especially in water desalination [1][2][3][4]. on by Generally, in membrane technology, the membrane performance (selectivity and permeability) depends on the membrane structure and membrane material [5][6][7][8]. Wet phase inversion process is a significant method for membrane preparation.…”

Section: Introductionmentioning

confidence: 99%

Hydrophilic Coating Layer by Layer on Polyethersulfone Membranes for Desalination

El–Gendi

Mohamed

Shalaby³

2020

Egypt. J. Chem.

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Water Desalination is becoming an issue for saving the required potable and drinking water due to shrinkage of pure water. Thus, this work deals with antifouling membrane preparation using polymeric compounds of Polyethersulfone/ Polyvinylalcohol (PES/PVA) with nanomaterials to produce antifouling membrane for water desalination. The PES membrane has prepared by phase inversion process followed by different coating ways. The coating with PVA provided the highest hydrophilic surface. The characterization of prepared membranes was carried out using various analysis methods such as scanning electron microscopy (SEM), mechanical properties, porosity and contact angle. The pore size distribution of prepared membranes was determined using the Brunauer-Emmett-Teller (BET) method. The result showed that the best membrane performance has a coating with PVA layer, where rejection reached to 99 %, 95% and 88% as a function of concentration 500, 1500, and 3000 ppm respectively, while the permeate flux reached to 48.4 L/m2.h, 32.3 L/m2.h and 21.5 L/m2.h respectively.

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Hyperbranched polyester and its sodium titanate nanocomposites as proton exchange membranes for fuel cells

Abstract: Sulfonated hyperbranched polyesters and their hybrids with sodium titanate nanowire were used to prepare novel proton exchange membranes for fuel cells.

Cited by 14 publications

References 39 publications

Enhanced Hydroxide Conductivity and Dimensional Stability with Blended Membranes Containing Hyperbranched PAES/Linear PPO as Anion Exchange Membranes

Enhanced Hydroxide Conductivity and Dimensional Stability with Blended Membranes Containing Hyperbranched PAES/Linear PPO as Anion Exchange Membranes

Antifouling and antimicrobial polyethersulfone/hyperbranched polyester-amide/Ag composite

Hydrophilic Coating Layer by Layer on Polyethersulfone Membranes for Desalination

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