title: Effect of adsorbed/intercalated anionic dyes into the mechanical properties of PVA: layered zinc hydroxide nitrate nanocomposites.
abstract: Zinc hydroxide nitrate (ZHN) was adsorbed with anions of blue dyes (Chicago sky blue, CSB; Evans blue, EB; and Niagara blue, NB) and intercalated with anions of orange dyes (Orange G, OG; Orange II, OII; methyl orange, MO). Transparent, homogeneous and colored nanocomposite films were obtained by casting after dispersing the pigments (dye-intercalated/adsorbed into LHSs) into commercial poly(vinyl alcohol) (PVA). The films were characterized by XRD, UV-Vis spectroscopy, and mechanical testing. The mechanical properties of the PVA compounded with the dye-intercalated/adsorbed ZHN were evaluated, and reasonable increases in Young's modulus and ultimate tensile strength were observed, depending on the amount and choice of layered filler. These results demonstrate the possibility of using a new class of layered hydroxide salts intercalated and adsorbed with anionic dyes to prepare multifunctional polymer nanocomposite materials.
authors.affiliation: CEPESQ-Centro de Pesquisas em Química Aplicada, Departamento de Química, Universidade Federal do Paraná, UFPR, Caixa Postal 19081, 81531-980 Curitiba, Paraná, Brazil.
authors.forename: Rafael
authors.initials: R
authors.lastname: Marangoni
authors.forename: Alexandre
authors.initials: A
authors.lastname: Mikowski
authors.forename: Fernando
authors.initials: F
authors.lastname: Wypych
mesh_terms: D000327:Adsorption; D000838:Anions / Q000737:chemistry; D005456:Fluorescent Dyes / Q000737:chemistry*; D006878:Hydroxides / Q000737:chemistry*; D053761:Nanocomposites / Q000737:chemistry*; D009566:Nitrates / Q000737:chemistry*; D011142:Polyvinyl Alcohol / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D000838:Anions; D005456:Fluorescent Dyes; D006878:Hydroxides; D009566:Nitrates; C554830:zinc hydroxide nitrate; D011142:Polyvinyl Alcohol