Facile synthesis and the properties of novel cardo poly(arylene ether sulfone)s with pendent cycloaminium side chains as anion exchange membranes

2017 ◽  
Vol 8 (29) ◽  
pp. 4207-4219 ◽  
Author(s):  
Feixiang Gong ◽  
Ruiqiang Wang ◽  
Xinbing Chen ◽  
Pei Chen ◽  
Zhongwei An ◽  
...  
Keyword(s):  
Phase Separation ◽  
Anion Exchange ◽  
Side Chains ◽  
Anion Exchange Membranes ◽  
Facile Synthesis ◽  
Arylene Ether

The structure of pendent cycloaminium side chains containing higher alkalinity of conductive groups was effective for improving the micro-phase separation of AEMs.

Block poly(arylene ether sulfone) copolymers tethering aromatic side-chain quaternary ammonium as anion exchange membranes

2018 ◽  
Vol 9 (6) ◽  
pp. 699-711 ◽  
Author(s):  
Xueliang Zhang ◽  
Qian Shi ◽  
Pei Chen ◽  
Jinfang Zhou ◽  
Songsong Li ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Anion Exchange ◽  
Quaternary Ammonium ◽  
Side Chain ◽  
Side Chains ◽  
Anion Exchange Membranes ◽  
Aromatic Side Chain ◽  
Arylene Ether

A series of poly(arylene ether sulfone) block copolymer ionomers have been synthesized with different hydrophobic and hydrophilic segments, where benzyl-quaternary ammonium groups are tethered to the side chains of hydrophilic blocks.

scholarly journals Anion Exchange Membranes Obtained from Poly(arylene ether sulfone) Block Copolymers Comprising Hydrophilic and Hydrophobic Segments

Polymers ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 325 ◽  
Author(s):  
Jun Ha Kim ◽  
Mohanraj Vinothkannan ◽  
Ae Rhan Kim ◽  
Dong Jin Yoo
Keyword(s):  
Phase Separation ◽  
Anion Exchange ◽  
Functional Groups ◽  
Mechanical Stability ◽  
Chemical Properties ◽  
Exchange Capacity ◽  
Degree Of Substitution ◽  
Anion Exchange Membranes ◽  
Arylene Ether ◽  
Physical And Chemical

The anion exchange membrane may have different physical and chemical properties, electrochemical performance and mechanical stability depending upon the monomer structure, hydrophilicity and hydrophobic repeating unit, surface form and degree of substitution of functional groups. In current work, poly(arylene ether sulfone) (PAES) block copolymer was created and used as the main chain. After controlling the amount of NBS, the degree of bromination (DB) was changed in Br-PAES. Following that, quaternized PAES (Q-PAES) was synthesized through quaternization. Q-PAES showed a tendency of enhancing water content, expansion rate, ion exchange capacity (IEC) as the degree of substitution of functional groups increased. However, it was confirmed that tensile strength and dimensional properties of membrane reduced while swelling degree was increased. In addition, phase separation of membrane was identified by atomic force microscope (AFM) image, while ionic conductivity is greatly affected by phase separation. The Q-PAES membrane demonstrated a reasonable power output of around 64 mW/cm2 while employed as electrolyte in fuel cell operation.

scholarly journals Imidazolium-Functionalized Poly(arylene ether sulfone) Anion-Exchange Membranes Densely Grafted with Flexible Side Chains for Fuel Cells

2016 ◽  
Vol 8 (38) ◽  
pp. 25279-25288 ◽  
Author(s):  
Dong Guo ◽  
Ao Nan Lai ◽  
Chen Xiao Lin ◽  
Qiu Gen Zhang ◽  
Ai Mei Zhu ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Anion Exchange ◽  
Side Chains ◽  
Anion Exchange Membranes ◽  
Arylene Ether

scholarly journals Improved Physicochemical Stability and High Ion Transportation of Poly(Arylene Ether Sulfone) Blocks Containing a Fluorinated Hydrophobic Part for Anion Exchange Membrane Applications

Polymers ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 1400 ◽  
Author(s):  
Ji Chu ◽  
Kyu Lee ◽  
Ae Kim ◽  
Dong Yoo
Keyword(s):  
Phase Separation ◽  
Anion Exchange ◽  
Physical Stability ◽  
Exchange Capacity ◽  
Open Circuit ◽  
Anion Exchange Membranes ◽  
Arylene Ether ◽  
Atomic Force ◽  
Physicochemical Stability ◽  
Exchange Membrane

A series of anion exchange membranes composed of partially fluorinated poly(arylene ether sulfone)s (PAESs) multiblock copolymers bearing quaternary ammonium groups were synthesized with controlled lengths of the hydrophilic precursor and hydrophobic oligomer via direct polycondensation. The chloromethylation and quaternization proceeded well by optimizing the reaction conditions to improve hydroxide conductivity and physical stability, and the fabricated membranes were very flexible and transparent. Atomic force microscope images of quaternized PAES (QN-PAES) membranes showed excellent hydrophilic/hydrophobic phase separation and distinct ion transition channels. An extended architecture of phase separation was observed by increasing the hydrophilic oligomer length, which resulted in significant improvements in the water uptake, ion exchange capacity, and hydroxide conductivity. Furthermore, the open circuit voltage (OCV) of QN-PAES X10Y23 and X10Y13 was found to be above 0.9 V, and the maximum power density of QN-PAES X10Y13 was 131.7 mW cm−2 at 60 °C under 100% RH.

Branched comb-shaped poly(arylene ether sulfone)s containing flexible alkyl imidazolium side chains as anion exchange membranes

2018 ◽  
Vol 6 (23) ◽  
pp. 10879-10890 ◽  
Author(s):  
Dong Liu ◽  
Muzi Xu ◽  
Mingliang Fang ◽  
Jiale Chen ◽  
Lei Wang
Keyword(s):  
Anion Exchange ◽  
Side Chains ◽  
Anion Exchange Membranes ◽  
Arylene Ether ◽  
Novel Strategy ◽  
Branched Structure

A novel strategy can enhance conductivity and stability of AEMs via the introduction of a branched structure in polymers.

Anion-exchange Membranes Containing Fluorinated Poly(arylene ether)s: Properties and Application in Pt-free Hydrazine Fuel Cell

2016 ◽  
Vol 45 (6) ◽  
pp. 664-666 ◽  
Author(s):  
Eriko Nishino ◽  
Junko Yamada ◽  
Koichiro Asazawa ◽  
Susumu Yamaguchi ◽  
Manai Shimada ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Anion Exchange ◽  
Anion Exchange Membranes ◽  
Arylene Ether
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