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Self-assembly of fluorous amphiphilic copolymers with ionogels and surface switchable wettability

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Abstract

Fluorous amphiphilic copolymers were synthesised by the microwave assisted copolymerization of 1H,1H,2H-perfluoro-1-octene and vinyl imidazole and characterized using size exclusion chromatography, FT-IR and 1H, 13C, 19F, and DOSY NMR. The fluorous amphiphilic copolymer, when coated on a glass surface, exhibited a water contact angle (WCA) of 112°, compared to that of 67° obtained for ionic homopolymers (poly(vinylimidazolium bromide)). Switchable wettability was controlled by tuning both ionic groups and the hydrophobic fluorous segments in the amphiphilic copolymer. The fluorous ionic copolymer offered a variable WCA of 112°, 107° or 97° depending on the surface hydrophobicity of the substrate, such as glass, a compressed carbon sheet or a Teflon surface, respectively. These amphiphilic copolymers self-assembled in different solvents and swelled. The swelling was up to 966% in water and methanol and up to 2036% in DMF with fluorous anions. The micelles formed from the self-assembly of amphiphilic copolymers in different solvents were characterized by dynamic light scattering (DLS) and cryo-transmission electron microscopy (cryo-TEM). Furthermore, Ag nanoparticles were coated on the amphiphilic ionomer and characterized using scanning electron microscopy and atomic force and electrostatic force microscopy.

Graphical abstract: Self-assembly of fluorous amphiphilic copolymers with ionogels and surface switchable wettability

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Publication details

The article was received on 15 Feb 2018, accepted on 19 Mar 2018 and first published on 19 Mar 2018


Article type: Paper
DOI: 10.1039/C8PY00273H
Citation: Polym. Chem., 2018, Advance Article
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    Self-assembly of fluorous amphiphilic copolymers with ionogels and surface switchable wettability

    S. N. Chavan, A. K. Padhan and D. Mandal, Polym. Chem., 2018, Advance Article , DOI: 10.1039/C8PY00273H

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