The Properties of Nano TiO2-Geopolymer Composite as a Material for Functional Surface Application

The aim of this study is to examine the properties of Nano TiO2-geopolymer as a material for functional surface applications such as walls, floors, bench top, arts and decoration materials. Class-C fly ash and metakaolin were used as raw materials to produce geopolymers pastes (binder). Geopolymers were synthesized through alkali activation method cured at 50°C for 2 hours using molar oxide ratios of SiO2/Al2O3 = 3.0, Na2O/SiO2 = 0.2, and H2O/Na2O = 10. Nano TiO2 was added into geopolymers paste at different concentration namely 0 wt%, 5wt%, 10wt% and 15wt % relative the weight of fly ash or metakaolin). The measurements were commenced after the samples aged 7 days. The samples made from fly ash were immersed in 1 M H2SO4 solution for 3 days for acid resistance examination. The self-cleaning properties of the composites were observed by immersing the sample into red clays solution. The X-Ray Diffraction (XRD) was performed to examine the structure and phase of the samples before and after acid resistance measurement. Scanning Electron Microscopy (SEM) was performed to examine the surface morphology of the resulting composites. The measurements results showed that Nano TiO2–geopolymers composite can be applied as functionally surface materials.

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