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Preparation of thin films using freeze drier alumina

2009; Springer Science+Business Media; Volume: 39; Issue: 1a Linguagem: Inglês

10.1590/s0103-97332009000200019

1678-4448

Ronald A. Silva, Cristina F. Diniz, Marcelo Machado Viana, Suzeley L. Abreu, Taiane G.F. Souza, Nelcy Della Santina Mohallem, Tarik D. S. Mohallem,

Adsorption, diffusion, and thermodynamic properties of materials

Synthesis of polymorphous of nanoparticulate alumina has been the subject of many works. The stabilization of these nanoparticles in aqueous suspensions is necessary in many technologic application and industrial products. Recently, a number of routes have been developed using various dispersants to prepare these nanoparticles dispersed in aqueous solution. In this work, nanoparticulate alumina prepared by precipitation and freezing drying was investigated as potential material for aqueous dispersion. These nanoparticles were dispersed in methylethylglycol (MEG), polyvinylalcohol (PVA) and polymethacrylate (PMA). The alumina nanoparticles and the dispersions were characterized physical-chemically and tested in the preparation of thin films.