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Erschienen in: Journal of Sol-Gel Science and Technology 3/2019

11.12.2018 | Original Paper: Sol-gel and hybrid materials for optical, photonic and optoelectronic applications

Influence of silane coupling agent on the properties of UV curable SiO2-PMMA hybrid nanocomposite

verfasst von: Marion Provost, Katarzyna Raulin, Tony Maindron, Vincent Gaud

Erschienen in: Journal of Sol-Gel Science and Technology | Ausgabe 3/2019

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Abstract

This work reports the preparation of UV-curable organic–inorganic hybrid nanocomposites synthetized by sol–gel method with the aim of obtaining highly transparent anti-abrasive coatings with long-term storage and stability for the protection of organic light emitting diodes (OLEDs). The inorganic phase is composed of tetraethoxysilane (TEOS) condensed under acid catalysis and mixed with tetrafunctionnal acrylate monomer and oligomer. Vinyltriethoxysilane (VTES), 3-methacryloxypropyltrimethoxysilane (MEMO), and 3-mercaptopropyltriethoxysilane (MTMO) are used as silane coupling agent and hybrid network modifier. Among the various parameters influencing the structure and properties of the hybrid, this work focuses on the nature and amount of coupling agent and their influence in terms of transparency, mechanical properties, and stability of the formulation. An optimum can be found in the silica to coupling agent ratio. Low level of functionalization leads to hybrids displaying poor optical performances and stability due to the coalescence of silica domains. On the contrary, an excess of functionalization reduces the abrasion resistance and the silica network formation. Changing the organic pendant of coupling agents greatly influences the properties of the coating by promoting the organic–inorganic balance. Dense and flexible as well as mechanically resistant coatings can be obtained from similar formulation by simply tuning the nature of the coupling agent depending of the needs of the application.

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Literatur
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Zurück zum Zitat Levy D, Zayat M (2015) The sol–gel handbook: synthesis, characterization and applications. Wiley, Hoboken Levy D, Zayat M (2015) The sol–gel handbook: synthesis, characterization and applications. Wiley, Hoboken
Metadaten
Titel
Influence of silane coupling agent on the properties of UV curable SiO2-PMMA hybrid nanocomposite
verfasst von
Marion Provost
Katarzyna Raulin
Tony Maindron
Vincent Gaud
Publikationsdatum
11.12.2018
Verlag
Springer US
Erschienen in
Journal of Sol-Gel Science and Technology / Ausgabe 3/2019
Print ISSN: 0928-0707
Elektronische ISSN: 1573-4846
DOI
https://doi.org/10.1007/s10971-018-4861-1

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