Počet záznamů: 1  

Epoxy-silica nanocomposite interphase control using task-specific ionic liquids via hydrolytic and non-hydrolytic sol-gel processes

  1. 1.
    0450069 - UMCH-V 2016 RIV GB eng J - Článek v odborném periodiku
    Donato, Ricardo Keitel - Perchacz, Magdalena - Ponyrko, Sergii - Donato, Katarzyna Zawada - Schrekker, H. S. - Beneš, Hynek - Matějka, Libor
    Epoxy-silica nanocomposite interphase control using task-specific ionic liquids via hydrolytic and non-hydrolytic sol-gel processes.
    RSC Advances. Roč. 5, č. 111 (2015), s. 91330-91339. ISSN 2046-2069
    Grant CEP: GA ČR(CZ) GA14-05146S; GA ČR GAP108/12/1459
    Institucionální podpora: RVO:61389013
    Klíčová slova: epoxy-silica nanocomposite * sol-gel processes * ionic liquids
    Kód oboru RIV: CD - Makromolekulární chemie
    Impakt faktor: 3.289, rok: 2015

    Carboxylic-functionalized task-specific imidazolium ionic liquids (carboxylic-ILs) presented selective high reactivities with epoxy-functionalized compounds, even in highly complex epoxy–silica nanocomposite systems. The carboxylic-ILs induced the in situ covalent bonding with epoxy based materials and tuning of the nanocomposites’ filler–matrix interphase when applied either via hydrolytic or non-hydrolytic sol–gel processes. Structural modifications in the carboxylic-ILs allowed fine morphology control and promoted the formation of well dispersed silica nanodomains. This approach resulted in nanocomposites with improved mechanical properties, without a negative effect on the glass transition temperature, for both rubbery and glassy epoxy–silica nanocomposite systems with a very small IL content (similar to 0.2 wt%). The best properties were achieved with the application of IL 1-carboxypropyl-3-methylimidazolium chloride, which produced a toughness increase of more than 7 times for the rubbery and almost twice for the glassy epoxy systems, when compared to their IL-free equivalents. These easy and quick procedures to produce imidazolium functionalized materials have the potential to open up a broad range of new conductive, responsive, smart and tunable reinforced materials.
    Trvalý link: http://hdl.handle.net/11104/0253132