Poly (aryl ether ketone)/polymeric ionic liquid with anisotropic swelling behavior for anion exchange membranes

Boron nitride enhanced shape memory poly(aryl ether ketone) actuators with rapid self‐deformation and staged responsive behaviors

“…Shape memory PAEK was synthesized through a universal condensation polymerization method, [ 40 ] which might be usually employed for the synthesis of polymer using various of small molecule monomers, as depicted in Scheme 1. Certain amount (mole ratio of 1:1:2:2) of 4,4′‐(hexafluoroisopropylidene) diphenol, 2,2‐bis (3‐amino‐4‐hydroxyphenyl) hexafluoropropane, 4,4′‐difluorobenzophenone, and potassium carbonate (K 2 CO 3 ) were added into a three‐neck flask containing TMSF/toluene mixture.…”

Achieving High Conductivity at Low Ion Exchange Capacity for Anion Exchange Membranes with Electrospun Polyelectrolyte Nanofibers

“…As one of the most representative methods, microphase separation introduces a continuous phase which is functionalized with ion exchange groups, leading to high conductivity and good mechanical properties at low IEC. Block copolymerization − and side-chain grafting − have been reported to prepare microphase separation membranes. However, the synthesis of microphase separation membranes is usually difficult, and the phase size needs to be well adjusted to achieve optimal membrane properties.…”

Piperidinium-Functionalized Poly(Vinylbenzyl Chloride) Cross-linked by Polybenzimidazole as an Anion Exchange Membrane with a Continuous Ionic Transport Pathway

“…The construction of efficient ion transport channels in AEM by introducing hydrophilic/hydrophobic microphase separation is a promising solution to the above dilemma. − In the AEM with ion transport highway, the adsorbed water is mainly distributed in ionic channels, that is, the utilization of water is enhanced, and thus, a high conductivity can be achieved at relatively low IEC without over swelling. In addition, the construction of the membrane composed by two kinds of polymers, in which one polymer is responsible for ion transport while the other one for mechanical supporting, is also an effective strategy to obtain AEM with high performances. − In bicomponent AEMs, each polymer performs its own functions, and the properties of the ion conducting polymer can be optimized without the need to consider its mechanical performance. One key issue in the fabrication of bicomponent AEM is to avoid macroscopic phase separation of two polymers with distinct properties. , We have found that the cross-linking between two polymers is very important for their compatibility without macroscale phase separation. , On the other hand, the ion-conducting polymer is hydrophilic, while the supporting polymer is usually hydrophobic; thus, a hydrophilic/hydrophobic microphase separation structure can also be realized in bicomponent AEM, which may be beneficial to form efficient ion transport channels in AEM.…”

“…One key issue in the fabrication of bicomponent AEM is to avoid macroscopic phase separation of two polymers with distinct properties. , We have found that the cross-linking between two polymers is very important for their compatibility without macroscale phase separation. , On the other hand, the ion-conducting polymer is hydrophilic, while the supporting polymer is usually hydrophobic; thus, a hydrophilic/hydrophobic microphase separation structure can also be realized in bicomponent AEM, which may be beneficial to form efficient ion transport channels in AEM. However, such bicomponent AEM that is macroscopically uniform but phase-separated in the microscopic level is only seldom reported. ,− , …”