Surface modification of TiO2 nanoparticles with 1,3,5-triazine based silane coupling agent and its cumulative effect on the properties of polyurethane composite coating

Abstract

The present work focuses on the development of functional polyurethane hybrids through the incorporation of surface modified TiO 2 nanoparticles. For improving the nanoparticle dispersion and increasing possible interactions between nano-particles and polyurethane matrix, the surface of the nano-particles was modified with 1,3,5-triazine core silane coupling agent. The surface modification of nanoparticles was confirmed by FESEM, FT-IR and Raman spectroscopic techniques. The functionalized nanoparticles were then inscribed in 0, 1 and 2 weight percentages into polyurethane matrix. The as prepared composite coatings were investigated for various anti-microbial, thermo-mechanical and anticorrosive properties. The tensile strength of polyurethane was improved by 300 % upon addition of 2 wt% of modified TiO 2 nanoparticles as compared to neat polyurethane. Fog test and electrochemical polarization studies suggest that the corrosion resistance increases with increase of the modified TiO 2 content in the coating formulation. The composite coatings also have good resistance towards various bacterial and fungal stains as compared to the pure polyurethanes. The coatings substantially gain hydrophilic nature symbiotically with TiO 2 content suggesting its potential application as self-cleanable material.

Surface treatment of TiO2 nanoparticles via sol–gel method: Effect of silane type on hydrophobicity of the nanoparticles

“…Photoactivity of TiO 2 , according to its application, can be reduced or increased through coupling [4], dye sensitization [2,5], and surface modification [6][7][8][9][10][11][12] and also doping metals, nonmetals or ionic compounds into the crystal structure [13,14] of the TiO 2 . In coatings industry, improve the properties and/or develop functional coatings via incorporation the nanoparticles such as TiO 2 nanoparticles have received many attractions, both in industry and in academia.…”

Development of Multifunctional Film for Greenhouse Applications in Tropical Regions

“…e presence of those bands confirmed that the organosilane was covalently attached to the additive surface [25]. e new peak at 1216 cm −1 was assigned to Si-C stretching [26]. e chemical structure of the modified UV1 additive was confirmed by 13 C-NMR where the chemical shift at 16.4 ppm, associated with carbon atom that connected to silicon atom (-O-Si-C-) [26], was observed, as shown in Figure 2.…”

Polymeric nanobiocomposites for biomedical applications

“…For example, functionalization of metallic nanoparticles, such as titanium dioxide is normally accomplished by using saline coupling agents, (i.e., 1,3,5-triazine and 3-triethoxysilyl propyl isocyanate), which have proven records to increase dispersion of the nanoparticles and to improve the tensile strength 115,116 of the developed nanocomposites.…”