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Functional and Switchable Amphiphilic PMMA Surface Prepared by 3D Selective Modification
Author(s) -
Guselnikova Olga,
Postnikov Pavel,
Sajdl Petr,
Elashnikov Roman,
Švorčík Vaclav,
Lyutakov Oleksiy
Publication year - 2018
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.201701182
Subject(s) - materials science , wetting , fourier transform infrared spectroscopy , contact angle , x ray photoelectron spectroscopy , surface modification , amphiphile , chemical engineering , grafting , scanning electron microscope , surface energy , hexadecane , polymer chemistry , nanotechnology , copolymer , organic chemistry , polymer , composite material , chemistry , engineering
The design and creation of switchable amphiphilicity on the surface of thin poly(methylmethacrylate) (PMMA) films are described. Amphiphilic properties are achieved through the 3D surface spatially selective modification using the membrane‐assisted diazonium approach. Proposed technique allows simple grafting with the hydrophilic and hydrophobic compounds in the surface valleys or tops, depending on the order of modification steps. Thermally controllable hydro‐ and oleophilicity are achieved by the in‐plane and height distinguished grafting of PMMA films with bis(trifluoromethyl)phenyl and poly( N ‐isopropylacrylamide) chains. Sample surface at different stages of the modification is characterized by the X‐ray photoelectron spectroscopy (XPS), Fourier‐transform infrared spectroscopy (FTIR), confocal microscopy, scanning electron microscopy–energy dispersive spectroscopy, and atomic force microscopy (AFM). Also the range of temperature‐dependent wettability tests (with water, hexadecane, and ethyleneglycol) is performed. The temperature controlled amphiphilicity switching is proved to be fully reversible and proceeding in seconds.