High Amorphous Vinyl Alcohol-Silica Bionanocomposites: Tuning Interface Interactions with Ionic Liquids
Tipo
Artigo
Data de publicação
2017
Periódico
ACS Sustainable Chemistry and Engineering
Citações (Scopus)
17
Autores
Donato K.Z.
Lavorgna M.
Donato R.K.
Raucci M.G.
Buonocore G.G.
Ambrosio L.
Schrekker H.S.
Mauler R.S.
Lavorgna M.
Donato R.K.
Raucci M.G.
Buonocore G.G.
Ambrosio L.
Schrekker H.S.
Mauler R.S.
Orientador
Título da Revista
ISSN da Revista
Título de Volume
Membros da banca
Programa
Resumo
© 2016 American Chemical Society.Herein, we demonstrate the effect of imidazolium ionic liquids (IL) applied as additives in the in situ formation of high amorphous vinyl alcohol (HAVOH)-silica bionanocomposites, using a simple sol-gel process approach. A complementary set of alkyl-, ether-, and carboxy-functionalized IL was used, allowing silica structure control and polymer-silica interphase tuning. Consequently, hybrids with diverse morphologies, as well as improved thermo-mechanical and barrier properties, were obtained. This diversity also highlighted the systems' dependency on the IL's molecular structure, where both the cation and anion influenced the hybrids' final properties. This could be evidenced as the polar group functionalized-IL (ether- and carboxy-functionalized IL) allowed the formation of multiple hydrogen bonds at the organic-inorganic interphase, inducing a fine hybrid morphology with well-dispersed silica nanodomains. This significantly increased the storage (∼50%) and tensile moduli (∼20%), extensibility (up to 300%), and glass transition temperature (>20 °C) and decreased the water vapor permeability (∼50%), which are desirable characteristics for potential food and medical packaging.
Descrição
Palavras-chave
Assuntos Scopus
Bio-nanocomposite , Imidazolium ionic liquids , Sol-gel silica , Vinylalcohol , Water vapor permeability