Abstract
This research aims to develop asphalt mixtures with new capabilities, namely photocatalytic, superhydrophobic, and self-cleaning capabilities. Different solutions were prepared combining nano-TiO2 and micro-PTFE on water, ethyl alcohol, and dimethyl ketone with different concentrations. The solutions were sprayed over the asphalt mixtures, and the photocatalytic and superhydrophobic capabilities were evaluated via decolourization of Rhodamine B dye aqueous solution under simulated solar irradiation and Water Contact Angle (WCA) measurements, respectively. Among the combinations analysed, the best solution was TiO2-PTFE with ethyl alcohol (8 g/L), which provided a decolourization of about 60% after having spent 8 h in light exposure conditions and a superhydrophobic surface with WCA equal to 153º. Thus, this research work aims to contribute to advances in the field of clean technologies, assisting in the transition to the “Green Recovery”, which is environmentally friendly, inclusive, and sustainable.
Highlights
Several research works have contributed to advances in clean technologies, assisting in the transition to an innovative socio-economic model identified as “Green Recovery”, which is environmentally friendly, inclusive, and sustainable
The coatings composed of nano/microparticles applied over asphalt mixtures have been provided new capabilities, such as: photocatalytic, to photodegrade pollutants for air cleaning; superhydrophobic, to improve road safety; and self-cleaning, to avoid slipping problems [1,2]
A global examination of these results reveals that the samples only with PTFE (AC 10 PTFE-ETH and AC 10 PTFE-CET) presented a photocatalytic efficiency 21% higher than AC 10
Summary
Several research works have contributed to advances in clean technologies, assisting in the transition to an innovative socio-economic model identified as “Green Recovery”, which is environmentally friendly, inclusive, and sustainable. In this sense, the coatings composed of nano/microparticles applied over asphalt mixtures have been provided new capabilities, such as: photocatalytic, to photodegrade pollutants for air cleaning; superhydrophobic, to improve road safety; and self-cleaning, to avoid slipping problems [1,2]. Charge carriers are formed (electrons e- and holes h+) They can react with oxygen and humidity, generating free radicals which can degrade, for example, NOx and SOx
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