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Multifunctional advanced coatings based on ZnO/M obtained by nanocasting method

F. VAJA (DUMITRU)1,2,* , D. FICAI1, A. FICAI1, O. OPREA1, C. GURAN1

Affiliation

  1. "Politehnica" University of Bucharest, Faculty of Applied Chemistry and Material Science, Bucharest, Romania
  2. Research Institute for Advanced Coatings-ICAA,Bucharest

Abstract

Nanocoating has attracted a lot of attention as a simple and cost-effective method of enhancing coating properties by the addition of a small amount of properly designed and dispersed nanometer fillers. In this research, we applied a nanocasting route for synthesis of ZnO nanoparticles on the mesoporous silicate supports. In the first step, mesoporous silica (SBA-15 structure) was prepared using a soft template and in the second step, this material was used for impregnation of ZnO nanoparticles. The obtained nanocomposites were morphologically and structurally characterized by XRD diffraction, SEM, IR and AFM investigations. The new obtained material was investigated as an additive in two coating systems: acrylic and polyurethane. With the goal to see how the new material improves the film characteristics of the coatings, different amounts of ZnO/M composite were introduced by ultrasound shaking for 2 hours in the acrylic and polyurethane coating system. SEM and AFM were used to investigate dispersion of ZnO/M nanocomposite and the changes in the surface behavior of the modified coatings. The results showed an improvement of the optical and mechanical properties, UV resistance of the new coatings at lower concentration (0.1% by wt), indicating the positive effect of addition of ZnO/M nanocomposite in the coatings. These composites will be investigated as an additive for improve weathering resistance of the coatings..

Keywords

Nanopowders, ZnO, Nanocasting, Advanced coatings, self-cleaning, wet scrub.

Submitted at: Feb. 7, 2013
Accepted at: Feb. 20, 2013

Citation

F. VAJA (DUMITRU), D. FICAI, A. FICAI, O. OPREA, C. GURAN, Multifunctional advanced coatings based on ZnO/M obtained by nanocasting method, Journal of Optoelectronics and Advanced Materials Vol. 15, Iss. 1-2, pp. 107-113 (2013)