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One-pot preparation of surface-functionalized barium titanate nanoparticles for high-K polystyrene composite films prepared via floating method
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SYSNO ASEP 0489883 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title One-pot preparation of surface-functionalized barium titanate nanoparticles for high-K polystyrene composite films prepared via floating method Author(s) Piana, Francesco (UMCH-V) RID, ORCID
Cacciotti, I. (IT)
Šlouf, Miroslav (UMCH-V) RID, ORCID
Nanni, F. (IT)
Pfleger, Jiří (UMCH-V) RIDSource Title Journal of Materials Science. - : Springer - ISSN 0022-2461
Roč. 53, č. 16 (2018), s. 11343-11354Number of pages 12 s. Language eng - English Country US - United States Keywords barium titanate ; polystyrene ; surface modification Subject RIV CD - Macromolecular Chemistry OECD category Polymer science R&D Projects GA17-03984S GA ČR - Czech Science Foundation (CSF) LO1507 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UMCH-V - RVO:61389013 UT WOS 000433486700016 EID SCOPUS 85047207966 DOI 10.1007/s10853-018-2457-3 Annotation An advanced and inexpensive one-pot method to prepare polystyrene (PS)–barium titanate (BT) films by solution mixing is reported. The process was developed to obtain free-standing films with an increased dielectric constant (ε′). Since PS is soluble in apolar solvents, BT nanoparticles (BT-NPs) were surface-modified with palmitic acid (PAc) and embedded within the polymer matrix without affecting homogeneity and smoothness of the composite. The films were prepared by floating method consisting in dropping BT-NPs dispersed in PS/toluene solution on the water surface. After the evaporation of toluene, smooth, free-standing and thermally stable films were obtained with a markedly higher ε′ compared to the neat PS. PAc modification improved the dispersion of BT-NPs in the apolar phase and prevented their diffusion into the aqueous phase during the toluene evaporation. The proposed film-forming technique makes it possible to modulate the thickness and shape of the films by selecting the quantity and concentration of the organic phase and using various templates, thus opening up a broad range of applications. Workplace Institute of Macromolecular Chemistry Contact Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Year of Publishing 2019
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