Marangoni Rafael, Ramos Luiz Pereira, Wypych Fernando
Centro de Pesquisas em Química Aplicada, Departamento de Química, Universidade Federal do Paraná, P.O. Box 19081, Centro Politécnico, Jardim das Américas, 81531-980 Curitiba, PR, Brazil.
J Colloid Interface Sci. 2009 Feb 15;330(2):303-9. doi: 10.1016/j.jcis.2008.10.081. Epub 2008 Dec 9.
Different anionic blue and orange dyes have been immobilized on a zinc hydroxide nitrate (Zn(5)(OH)(8)(NO(3))(2)nH(2)O--Zn-OH-NO(3)) by anion exchange with interlayer and/or outer surface nitrate ions of the layered matrix. Orange G (OG) was totally intercalated, orange II (OII) was partially intercalated, while Niagara blue 3B (NB) and Evans blue (EV) were only adsorbed at the outer surface. Several composite films of poly(vinyl alcohol)--PVA were prepared by casting through the dispersion of the hybrid material (Zn-OH-OG) into a PVA aqueous solution and evaporation of water in a vacuum oven. The obtained composite films were transparent, colored, and capable of absorbing UV radiation. Improved mechanical properties were also obtained in relation to the nonfilled PVA films. These results demonstrate the onset of a new range of potential applications for layered hydroxide salts in the preparation of polymer composite multifunctional materials.
通过与层状基质的层间和/或外表面硝酸根离子进行阴离子交换，已将不同的阴离子蓝色和橙色染料固定在碱式硝酸锌（Zn(5)(OH)(8)(NO(3))(2)nH(2)O--Zn-OH-NO(3)）上。橙色G（OG）完全插层，橙色II（OII）部分插层，而尼亚加拉蓝3B（NB）和伊文思蓝（EV）仅吸附在外表面。通过将杂化材料（Zn-OH-OG）分散到聚乙烯醇（PVA）水溶液中并在真空烘箱中蒸发水分，制备了几种聚乙烯醇（PVA）复合膜。所得复合膜是透明的、有颜色的，并且能够吸收紫外线辐射。与未填充的PVA膜相比，其机械性能也得到了改善。这些结果表明层状氢氧化物盐在制备聚合物复合多功能材料方面开始有一系列新的潜在应用。
