Recent achievements in the construction of surfaces with special wettabilities, such as superhydrophobicity, superhydrophilicity, superoleophobicity, superoleophilicity, superamphiphilicity, superamphiphobicity, superhydrophobicity/superoleophilicity, and reversible switching between superhydrophobicity and superhydrophilicity, are presented. Particular attention is paid to superhydrophobic surfaces created via various methods and surfaces with reversible superhydrophobicity and superhydrophilicity that are driven by various kinds of external stimuli. The control of the surface micro-/nanostructure and the chemical composition is critical for these special properties. These surfaces with controllable wettability are of great importance for both fundamental research and practical applications.

Design and Creation of Superwetting/Antiwetting Surfaces

Review of the proton exchange membranes for fuel cell applications

https://cyberleninka.org/article/n/768408.pdf

Mechanical properties of graphene and graphene-based nanocomposites

Color Control in π-Conjugated Organic Polymers for Use in Electrochromic Devices

Transparent conductors as solar energy materials: A panoramic review

Aromatic disulfide metathesis has been reported as one of the very few dynamic covalent chemistries undergone at room-temperature. Here, bis(4-aminophenyl) disulfide is effectively used as a dynamic crosslinker for the design of self-healing poly(urea–urethane) elastomers, which show quantitative healing efficiency at room-temperature, without the need for any catalyst or external intervention.

Catalyst-free room-temperature self-healing elastomers based on aromatic disulfide metathesis

Pyrrolidinium-based polymeric ionic liquids as mechanically and electrochemically stable polymer electrolytes

Recently we have shown the self-healing ability of a poly(urea-urethane) elastomer reversibly cured with aromatic disulfide bridges. Here we show that although being chemically crosslinked, such materials can be easily reprocessed by applying heat and pressure to obtain any desired form. This offers a unique paradigm towards thermoset processing and recycling, as well as for isocyanate-free manipulation of polyurethanes.

The processability of a poly(urea-urethane) elastomer reversibly crosslinked with aromatic disulfide bridges

New proton-conducting polymer electrolytes based on new porous films of polybenzimidazole doped with phosphoric acid have been obtained. The porous polybenzimidazole films were prepared by leaching out a low-molecular-weight compound using a selective solvent of the porogen from polymer/porogen mixtures. This method allows control over the porosity level up to porosities of 75%. The pore size and morphology strongly depend on the porogen/PBI ratio as observed by SEM. The pore size varies from dimethyl phthalate>diphenyl phthalate>triphenyl phosphate. The acid uptake of the membranes, and therefore the ionic conductivity of the films, increases with the porosity. Ionic conductivity as high as 5 × 10-2 S/cm and mechanically stable membranes are easily obtained by soaking the highly porous films...

Porous Polybenzimidazole Membranes Doped with Phosphoric Acid: Highly Proton-Conducting Solid Electrolytes

In this work, we report the synthesis of a great variety of polycations with varying counter-anions. These new polymers were obtained by a simple anion exchange reaction facilitated by the phase separation of the resulting products. This strategy has been successfully applied to three different polycations, poly(1-vinyl-3-ethylimidazolium bromide) poly(ViEtIm+Br-), poly(1-ethyl-4-vinylpyridinium bromide) poly(ViEtPy + Br - ), and poly(methacryloyloxyethyltrimethylammonium chloride) poly(EMTMA + Cl - ), with seven counter-anions such as PF - 6 , CF 3 SO - 3 , (CF 3 SO 2 ) 2 N - , (CF 3 CF 2 SO 2 ) 2 N - , dodecylbenzenesulfonate, toluene-4-sulfonate, and bis(2-ethylhexyl) hydrogen phosphate. The solubility range of the new polymeric ionic liquids becomes very broad, including apolar organic solvents and ionic liquids, depending on the nature of the counter-anion. Thermogravimmetric experiments showed that the thermalstability of the PILs also depends on the nature of the counter-anion improving in the order CF 3 SO - 3 > (CF 3 CF 2 SO 2 ) 2 N - > C 12 H 25 C 6 H 4 SO - 3 > PF - 6 > Br - > C 16 H 34 PO - 4 .

Hans J. Grande

Papers

Catalyst-free room-temperature self-healing elastomers based on aromatic disulfide metathesis

Pyrrolidinium-based polymeric ionic liquids as mechanically and electrochemically stable polymer electrolytes

The processability of a poly(urea-urethane) elastomer reversibly crosslinked with aromatic disulfide bridges

Porous Polybenzimidazole Membranes Doped with Phosphoric Acid: Highly Proton-Conducting Solid Electrolytes

Synthesis of Novel Polycations Using the Chemistry of Ionic Liquids