title: Optically active poly(amide-imide)/TiO2 nanocomposites containing amino acid moieties: synthesis and properties.
abstract: The novel optically active poly(amide-imide) (PAI)/TiO2 nanocomposites containing fluorene moieties have been successfully synthesized through ultrasonic irradiation. The surface of nanoparticles was chemically modified with γ-aminopropyltriethoxyl silane to enhance the compatibility with polymeric matrix and to avoid the aggregation of nanoparticles. The dispersion of surface-modified TiO2 in PAI film was confirmed by the transmission electron microscope (TEM) analysis showing the well-dispersed nanosized TiO2 nanoparticles. The thermal stabilities and optical properties of PAI/surface-modified TiO2 nanocomposite films were also investigated. The thermogravimetric analysis data showed an improvement of thermal stability of novel nanocomposite films as compared to the pure polymer.
authors.affiliation: Department of Chemistry, Yasouj University, 75914-74831, Yasouj, Islamic Republic of Iran. zahrarafiee2004@yahoo.com.
authors.forename: Zahra
authors.initials: Z
authors.lastname: Rafiee
authors.affiliation: Department of Chemistry, Yasouj University, 75914-74831, Yasouj, Islamic Republic of Iran.
authors.forename: Elham
authors.initials: E
authors.lastname: Zare
mesh_terms: D000596:Amino Acids / Q000737:chemistry*; D053761:Nanocomposites / Q000737:chemistry* / Q000648:ultrastructure; D009757:Nylons / Q000737:chemistry*; D010316:Particle Size; D014025:Titanium / Q000737:chemistry*
chemical_list: D000596:Amino Acids; D009757:Nylons; C009495:titanium dioxide; D014025:Titanium
keywords: Amine-functionalized TiO2; Nanocomposite; Poly(amide–imide); TiO2