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Description:

The side-chain fluorinated polymers bearing diethylene glycol monomethyl ether (EG2) and perfluorohexyl (C6F13) side groups was synthesized using glycidyl triazolyl polymers (GTPs). These GTPs were prepared via catalyst-free azide–alkyne cycloaddition between glycidyl azide polymers and electron-deficient alkyne derivatives. They form well-organized layered structures with thermal stability up to 240 °C, significantly surpassing that of fluoropolymers with longer fluorocarbon chains such as C8F17 and C10F21. This improved thermal stability is attributed not only to the high molecular weight but also to the longer and more flexible repeating units of the GTP backbone compared to vinyl-based polymers. The layered structures also serve as physical crosslinks, contributing to higher storage modulus. The surface properties of the fluorinated GTPs were evaluated by contact angle measurements. Among them, GTP‑EG2‑co‑C6F1325 exhibits particularly distinctive surface behavior. During the advancing contact angle measurement, the water droplet showed pronounced stick-and-slip motion, with a maximum contact angle exceeding the superhydrophobic threshold of 150°. In contrast, the receding contact angle was below 10°, satisfying the criterion for superhydrophilicity. Notably, this sticky hydrophobicity was achieved on the smooth surface (surface roughness < 1 nm), offering promising advantages for practical applications requiring precise droplet positioning and strong droplet adhesion.

Rights:

• Creative Commons BY Attribution 4.0 International
  

Keyword: Fluorinated polymers, Liquid-crystal polymers, Post-polymerization functionalization, Click chemistry, Contact angle hysteresis, Sticky hydrophobic surface

Date published: 2026-02-27

Publisher: American Chemical Society (ACS)

Journal:

• ACS Applied Polymer Materials (ISSN: 26376105) vol. 8 issue. 4 p. 3023-3032

Funding:

• Precursory Research for Embryonic Science and Technology JPMJPR23QB (液晶分子配列を生かした未来メカトロニクス材料の創出)
• Japan Society for the Promotion of Science 25K08756 (従来と異なる設計思想に基づくイオン伝導性高分子の開発とデバイス適用)

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.1021/acsapm.5c04519

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Updated at: 2026-03-13 08:30:08 +0900

Published on MDR: 2026-03-12 17:49:32 +0900