Artigo
TiO2/PDMS nanocomposites for use on self-cleaning surfaces
Registro en:
Surface & Coatings Technology. Lausanne: Elsevier Science Sa, v. 239, p. 16-19, 2014.
0257-8972
10.1016/j.surfcoat.2013.11.009
WOS:000331495100003
Autor
Tavares, M. T. S.
Santos, A. S. F.
Santos, I. M. G.
Silva, M. R. S.
Bomio, M. R. D.
Longo, E. [UNESP]
Paskocimas, C. A.
Motta, F. V.
Resumen
In this study, polydimethylsiloxane (PDMS)/TiO2 nanocomposite was processed by the spray method. TiO2 nanoparticles were synthesized by microwave-assisted hydrothermal method. Varying the proportion of nanoparticles in 0%, 0.5% and 1% by weight, commercial TiO2 (P25) was used for comparison purposes. The photocatalytic activity of nanocomposites impregnated with methylene blue was assessed by means of UV-visible spectroscopy. Changes in contact angle were analyzed before and after UV degradation tests. The effect of ultraviolet radiation on the chemical structure of the PDMS matrix was evaluated by Fourier transform infrared spectroscopy (FTIR). The results indicated that the addition of TiO2 nanoparticles in PDMS provides good photocatalytic properties in the decomposition of methylene blue, which is an important characteristic for the development of coatings for self-cleaning. For comparison purposes, commercial P25 was also used to investigate the photocatalytic activity. (C) 2013 Elsevier B.V. All rights reserved. RECAM (Rede de Catalisadores Ambientais) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Univ Fed Rio Grande do Norte, Dept Mat Engn, BR-59078900 Natal, RN, Brazil Univ Fed Paraiba, Dept Mat Engn, BR-58051900 Joao Pessoa, Paraiba, Brazil Univ Fed Paraiba, Dept Chem, BR-58051900 Joao Pessoa, Paraiba, Brazil Sao Paulo State Univ, Interdisciplinary Lab Electrochem & Ceram, BR-14801907 Araraquara, SP, Brazil Sao Paulo State Univ, Interdisciplinary Lab Electrochem & Ceram, BR-14801907 Araraquara, SP, Brazil CNPq: 564913/2010-3