Counteranion-Specific Hydration States of Cationic Polyelectrolyte Brushes

Yuji Higaki, Yoshihiro Inutsuka, Hitomi Ono, Norifumi L. Yamada, Yuka Ikemoto, Atsushi Takahara

研究成果: ジャーナルへの寄稿記事

5 引用 (Scopus)

抄録

While polyelectrolyte brushes have received extensive attention due to their particular surface properties, the ion-specific hydration states remain largely unknown. Here, we report the counteranion-specific hydration states of cationic poly[2-(methacryloyloxy)ethyltrimethylammonium] (PMTA) brushes in salt-free water. The water droplet contact angle on the PMTA brushes depends on the counteranion species, and the order is consistent with the Hofmeister series. Weakly hydrated chaotropic counteranions are strongly bound to weakly hydrated quaternary ammonium (QA+) cations in the PMTA brush chains, which induces a reduction in the ζ-potential, dehydration, and collapse of the PMTA brushes. The PMTA brushes with strongly hydrated chloride counteranions produce a more diffuse tail and less swollen bound layer under salt-free deuterium oxide than brushes with weakly hydrated thiocyanate counteranions. Ion pairing disturbs the ordering of hydrated water in the PMTA brushes. Our work enhances the understanding of the ion specificity in the hydration states of polyelectrolyte brushes and encourages the rational design of charged polymer materials.

元の言語英語
ページ(範囲)5268-5275
ページ数8
ジャーナルIndustrial and Engineering Chemistry Research
57
発行部数15
DOI
出版物ステータス出版済み - 4 18 2018

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Brushes
Polyelectrolytes
Hydration
Ions
Water
Salts
Deuterium Oxide
polycations
Heavy water
Dehydration
Ammonium Compounds
Contact angle
Surface properties
Cations
Chlorides
Polymers
Positive ions

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

これを引用

Counteranion-Specific Hydration States of Cationic Polyelectrolyte Brushes. / Higaki, Yuji; Inutsuka, Yoshihiro; Ono, Hitomi; Yamada, Norifumi L.; Ikemoto, Yuka; Takahara, Atsushi.

:: Industrial and Engineering Chemistry Research, 巻 57, 番号 15, 18.04.2018, p. 5268-5275.

研究成果: ジャーナルへの寄稿記事

Higaki, Yuji ; Inutsuka, Yoshihiro ; Ono, Hitomi ; Yamada, Norifumi L. ; Ikemoto, Yuka ; Takahara, Atsushi. / Counteranion-Specific Hydration States of Cationic Polyelectrolyte Brushes. :: Industrial and Engineering Chemistry Research. 2018 ; 巻 57, 番号 15. pp. 5268-5275.
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