@article{bibcite_36740,
  author = {Piyachai Khomein and Tijs Lap and Gao Liu},
  title = {Synthesis of highly sulfonated 2,6-diphenyl-p-Phenylene oxide: A highly conductive membrane},
  abstract = {<p>Highly sulfonated aromatic polymers are desired for the possible highest performance of polymer electrolytes in fuel cells and electrolyzer applications. Here, we reported the method to prepare highly sulfonated 2,6-diphenyl-p-phenylene oxide (SP<sub>3</sub>O), a commercially available aromatic polymer, with the highest IEC of 4.42 meq/g. Three sulfonation reagents including chlorosulfonic acid (HSO<sub>3</sub>Cl), concentrated sulfuric acid (conc. H<sub>2</sub>SO<sub>4</sub>), and trimethylsilyl chlorosulfonate (TMSCS) were investigated for single and two-step sulfonation reactions. In addition, DMSO-assisted thermal crosslinking method was applied to prepare crosslinked SP<sub>3</sub>O membranes to improve their mechanical strength and film-forming ability. Proton exchange membrane from crosslinked SP<sub>3</sub>O displayed a proton conductivity as high as 250\&nbsp;mS/cm at 95\&nbsp;\% RH and 60{\textdegree} C.</p>},
  year = {2025},
  booktitle = {Polymer},
  journal = {Polymer},
  series = {Polymer},
  volume = {335},
  pages = {128806},
  month = {09/2025},
  institution = {Elsevier BV},
  publisher = {Elsevier BV},
  issn = {0032-3861},
  url = {https://doi.org/10.1016/j.polymer.2025.128806},
  doi = {10.1016/j.polymer.2025.128806},
}