When a pH-triggered nanopatterned shape transition drives the wettability of a hierarchically self-organized film: a bio-inspired effect of 'sea Anemone'
| Autor: | Pierre Marcasuzaa, Maud Save, Pierre Gerard, Laurent Billon |
|---|---|
| Přispěvatelé: | Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux (IPREM), Université de Pau et des Pays de l'Adour (UPPA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Arkema (Arkema), ARKEMA |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Honeycomb film 02 engineering and technology 010402 general chemistry 01 natural sciences pH sensitive surface Micro and nano structuration Biomaterials Colloid and Surface Chemistry Nano Copolymer Honeycomb Hierarchical structure chemistry.chemical_classification Polymer [CHIM.MATE]Chemical Sciences/Material chemistry 021001 nanoscience & nanotechnology Electrostatics Casting Surface energy 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials [CHIM.POLY]Chemical Sciences/Polymers chemistry Chemical engineering Wettability Wetting 0210 nano-technology |
| Zdroj: | Journal of Colloid and Interface Science Journal of Colloid and Interface Science, Elsevier, 2021, 581 (Part A), pp.96-101. ⟨10.1016/j.jcis.2020.07.130⟩ |
| ISSN: | 0021-9797 1095-7103 |
| DOI: | 10.1016/j.jcis.2020.07.130⟩ |
| Popis: | Hypothesis Hierarchically structured surfaces including sensitive materials presents the advantage to exalt wettability variation due to the combination of micro structure effect directed by Cassie Baxter and/or Wenzel behaviour which is tuned by the surface energy variation of sensitive polymer films. Experiments Herein is reported the synthesis and the hierarchical structuration of a pH sensitive diblock copolymer P(S-stat-MMA)-b-P4VP with a pH-sensitive Poly 4-vinylpyridine P4VP block. Applying the Breath Figure method casting (minute time scale process), this diblock copolymer allows to obtain a micro porous honeycomb film while a wall nano-structuration due to self-assembly of diblock copolymer is observed. Findings The pH-triggered wettability is studied and correlated with the morphology evolution of P4VP nano-domains investigated by AFM in a liquid cell. Indeed, a nano-dots to nano-rings/donuts transition is highlighted when decreasing the pH below the pKa of the P4VP. This nano “sea Anemone” shape transition induces the macroscopic changes of the wettability of a hierarchically self-organized honeycomb film, explained by the protonation of P4VP chains inducing electrostatic repulsion and then hydrophilic surface. |
| Databáze: | OpenAIRE |
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