Colloidal Dispersion of a Perfluorosulfonated Ionomer in Water–Methanol Mixtures
AbstractWe have investigated the dispersion state of a perfluorosulfonated ionomer (PFSI; Nafion®) in aqueous dispersion and the effect of methanol (MeOH) added to the aqueous dispersion by small-angle X-ray scattering (SAXS) as well as static and dynamic light scattering (SLS and DLS, respectively). Although both electrostatic and hydrophobic interactions of PFSI are expected to be strong in the dispersions, SAXS profiles obtained were satisfactorily fitted by the spherical particle model of a bimodal molar mass distribution. The rod-like aggregate model proposed in previous papers was denied at least for the present PFSI dispersion. Although the SAXS profiles exhibited a weak peak and the auto-correlation functions of DLS showed a log-time decay by the “repulsive cage effect” due to the long-ranged electrostatic interaction among PFSI particles, the concentration dependence of SLS results was probably normal because the cancellation of the electrostatic and hydrophobic interactions. The addition of MeOH into the aqueous dispersion of PFSI weakened both the hydrophobic and electcrostatic interactions of PFSI, and it is rather difficult to classify whether MeOH is a good or poor solvent (dispersant) for PFSI. View Full-Text
Scifeed alert for new publicationsNever miss any articles matching your research from any publisher
- Get alerts for new papers matching your research
- Find out the new papers from selected authors
- Updated daily for 49'000+ journals and 6000+ publishers
- Define your Scifeed now
Li, S.; Terao, K.; Sato, T. Colloidal Dispersion of a Perfluorosulfonated Ionomer in Water–Methanol Mixtures. Polymers 2018, 10, 72.
Li S, Terao K, Sato T. Colloidal Dispersion of a Perfluorosulfonated Ionomer in Water–Methanol Mixtures. Polymers. 2018; 10(1):72.Chicago/Turabian Style
Li, Sinan; Terao, Ken; Sato, Takahiro. 2018. "Colloidal Dispersion of a Perfluorosulfonated Ionomer in Water–Methanol Mixtures." Polymers 10, no. 1: 72.
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.