Development of a waterproofing system based on an acrylic resin and hydrophobic and photocatalytic nanoparticles

Belinda Murillo-Segovia, Ana Laura Martínez-Hernández, Waltter López-González, Claudia Rodríguez-González, Carlos Velasco-Santos

Instituto Tecnológico de Querétaro / Sika Mexicana S.A. de C. V /Universidad Autonoma de Ciudad Juárez

Polymer nanocomposites were generated using hydrophobic and photocatalytic nanoparticles of TiO2 in different concentrations (I, II, III, IV and V) to reinforced acrylic resins (A and B). These nanocomposites were evaluated according to Mexican standard NMX-C-450-ONNCCE-2010 which sets the values required to be considered an elastomeric waterproofing. Different test were applied to materials to demonstrate the performance of water absorption, tensile strength , elongation at break; contact angle, storage modulus and photocatalytic activity on the surface. It is intended that the obtained nanocomposites solve the problem of surface contamination with solid particles in the environment. This research has proved that the hydrophobic reinforcements reduce the water absorption of the base material. The reinforcements also improve hydrophobic photocatalytic behavior of matrices, shown by degradation of a colorant. Thus, polymer nanocomposites in this research improve notably the surface performance. However, it was observed that the photocatalytic reinforcements reduce the life cycle of the polymer matrices.

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