Poly(arylene ether ketone) carrying hyperquaternized pendants: Preparation, stability and conductivity

Configuring Anion‐Exchange Membranes for High Conductivity and Alkaline Stability by Using Cationic Polymers with Tailored Side Chains

“…Shen et al have followed a macromolecular design where four QA‐functional phenyl rings were attached to a polyketone backbone via a single flexible alkoxy spacer chain . The four pendant phenyl rings were selectively chloromethylated and then quaternized using trimethylamine.…”

“…This result probably arose from the large size of the ionic moiety and the flexible spacer, allowing the phase separation to occur. The AEMs retained between 75% and 92% of their initial conductivity after being immersed in 4 m NaOH during 720 h at room temperature …”

Anion exchange membranes based on tetra-quaternized poly(arylene ether ketone)

“…According to the literature [36], the oxidative stability was studied via comparing the changes in weight of the membranes after being treated with Fenton's reagent (3 wt% H 2 O 2 + 2 ppm FeSO 4 ). The membranes were soaked in Fenton's reagent in an Erlenmeyer flask at 80 ˚C for 10 h, and then the membranes were dried with filter paper to remove the surface liquid; afterwards, the weights of the membranes were recorded.…”

Dual-cation comb-shaped anion exchange membranes: Structure, morphology and properties

“…Over the last decade, numerous strategies [6][7][8][9][10][11] have been developed aiming to achieve good nano-phase separation and well-connected ion conducting channels. For example, Jannasch and co-workers [9] found that by densely grafting the quaternary ammonium groups (QA groups) onto one particular segment of polymer backbones, the nano-phase separation ability and the hydroxide conductivity could be enhanced because of the increased hydrophilic-hydrophobic discrimination [9,[12][13][14][15][16]. Bai and Contents lists available at ScienceDirect journal homepage: www.elsevier.com/locate/memsci co-workers also reported one highly conductive AEM with three QA groups locating on one pendent phenyl ring [17].…”