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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Janke, Andreas
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Topics
Publications (10/10 displayed)
- 2022Influence of CNT Length on Dispersion, Localization, and Electrical Percolation in a Styrene-Butadiene-Based Star Block Copolymercitations
- 2020Enthalpy relaxation, crystal nucleation and crystal growth of biobased poly(butylene isophthalate)citations
- 2020Bio-inspired deposition of electrochemically exfoliated graphene layers for electrical resistance heating applicationscitations
- 2019Inductive heating using a high-magnetic-field pulse to initiate chemical reactions to generate composite materials
- 2017Effects of nanoparticles on phase morphology in thin films of phase-separated diblock copolymerscitations
- 2015Reversible thermosensitive biodegradable polymeric actuators based on confined crystallization
- 2009Temperature dependent physicochemical properties of poly(N- isopropylacrylamide-co-N-(1-phenylethyl) acrylamide) thin filmscitations
- 2005Composites of Polycarbonate with Multiwalled Carbon Nanotubes Produced by Melt Mixing
- 2005Properties of polypropylene clay nanocomposites modified with difunctional compoundscitations
- 2003Melt mixing of polycarbonate/multi-wall carbon nanotube compositescitations
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article
Temperature dependent physicochemical properties of poly(N- isopropylacrylamide-co-N-(1-phenylethyl) acrylamide) thin films
Abstract
<p>The physicochemical properties of thermo-responsive polymer films are dynamically altered upon changes in environmental conditions. We report on the design and detailed characterization of a novel thermo-responsive polymer film with a temperature transition tuned to fit applications related to the control of marine biofouling. A copolymer consisting of poly(N-isopropylacrylamide) (PNIPAAm) and N-(1-phenylethyl) acrylamide (PEAAm) was synthesized and immobilized as a thin film onto Teflon AF surfaces using a low pressure argon plasma treatment. The temperature dependent physicochemical properties of the thermo-responsive film were thoroughly characterized and the impact of sea water on the film properties was investigated. The immobilized thermo-responsive film exhibits a reversible swelling/deswelling with temperature. Atomic force microscopy showed no morphological changes with varying temperature. Streaming current measurements performed above and below the transition temperature of the thermo-responsive hydrogel indicated that the charging of the polymer/aqueous solution interface is mainly determined by the preferential water ion adsorption at the Teflon AF surface. Inverse contact angles measured using captive air bubbles and analysed by axisymmetric drop shape analysis (ADSA) supported the intrinsic properties of the thermo-responsive film, as surface hydrophilicity decreased with increasing temperature. The advancing water contact angle decreased with increasing temperature, which may be explained by the different molecular mobility at different temperatures, allowing or hampering the re-orientation of hydrophobic segments at the solid-liquid and solid-fluid interfaces. These new films will allow investigations on the interaction of microorganisms with environmentally sensitive surfaces.</p>