Tailoring block copolymer nanoporous thin films with acetic acid as a small guest molecule
| Autor: | José Ignacio Martín, Giuseppe Portale, Fernando Valdes‐Vango, Daniel Hermida-Merino, Francisco J. García Alonso, María Vélez, J. M. Alameda, Carlos Quirós, Alberto Alvarez-Fernandez |
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| Přispěvatelé: | Ministerio de Economía y Competitividad (España), European Commission, Álvarez-Fernández, Alberto, Vélez, María, Álvarez-Fernández, Alberto [0000-0002-2607-3035], Vélez, María [0000-0003-0311-7434], Macromolecular Chemistry & New Polymeric Materials |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Polymers and Plastics Carboxylic acid FABRICATION 02 engineering and technology mesoporous materials 010402 general chemistry 01 natural sciences Micelle Supramolecular assembly Materials Chemistry Copolymer Thin film supramolecular assembly TEMPERATURE chemistry.chemical_classification Nanoporous Organic Chemistry Polymer DIBLOCK COPOLYMER 021001 nanoscience & nanotechnology TOROIDAL MICELLES EVOLUTION 0104 chemical sciences ARRAYS block copolymers small molecules chemistry Chemical engineering MORPHOLOGY COMPLEXES POLYMERS CRYSTALLIZATION 0210 nano-technology Mesoporous material |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname Polymer International, 68(11), 1914-1920. Wiley |
| ISSN: | 0959-8103 |
| Popis: | Block copolymers offer the fabrication of mesoporous thin films with distinct nanoscale structural features. In this contribution, we present the use of acetic acid (CH3COOH) as a low‐molecular‐weight guest molecule to tune the supramolecular assembly of poly[styrene‐block‐(4‐vinylpyridine)] (PS‐b‐P4VP), offering a versatile and straightforward method to obtain tailored nanostructured films with controlled topography and pore size. Spin‐coating toluene solutions of PS‐b‐P4VP, with a variable amount of CH3COOH, leads to micellar thin films, where the micelles contain the carboxylic acid as a guest molecule. The size can be conveniently modified in these films (from 48 to 75 nm) by varying the amount of organic acid in the starting solutions. Subsequent surface reconstruction of micellar films using ethanol leads to ring‐shaped copolymer nanoporous films with modulated diameter. Controlling the micelle reconstruction process, cylindrical porous films are also obtained. Interestingly, changing the type of aliphatic carboxylic acid leads to a modification of the observed film morphology from micelles to out‐of‐plane P4VP cylinders (or lamellae) in a PS matrix. This work was supported by Spanish MINECO (grants FIS2013‐45469 and FIS2016‐76058 (AEI/FEDER, EU)). |
| Databáze: | OpenAIRE |
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