Self-assembly of fluorous amphiphilic copolymers with ionogels and surface switchable wettability. Issue 17 (5th April 2018)

• Record Type: Journal Article
• Authors: Chavan, Santosh N.; Padhan, Anil K.; Mandal, Debaprasad
• Is Part Of: Polymer chemistry. Volume 9:Issue 17(2018)
• Page Start: 2258
• Page End: 2270
• Publication Date: 2018-04-05
• Subjects: Polymers -- Periodicals; Macromolecules -- Periodicals; Polymerization -- Periodicals; 547.705
• DOI: 10.1039/c8py00273h
• Languages: English
• ISSNs: 1759-9954

Abstract

Abstract : Fluorous amphiphilic ionic copolymers of 1 H, 1 H, 2 H -Perfluoro-1-octene and vinyl imidazole self-assembled in different solvents to form ionogels and exhibits tunable substrate switching wettability. Abstract : Fluorous amphiphilic copolymers were synthesised by the microwave assisted copolymerization of 1 H, 1 H, 2 H -perfluoro-1-octene and vinyl imidazole and characterized using size exclusion chromatography, FT-IR and 1 H, 13 C, 19 F, 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.