Abstract
The accelerated artificial aging with ultraviolet radiation, viscosity, density, no-pick-up time, flexibility, and abrasion resistance of lignin-modified road marking paint were evaluated. The addition of lignin did not cause significant changes in the physical chemistry, flexibility and no-pick-time test compared to the precursor paint. The addition of 1.00 wt. % of lignin increased the abrasion resistance by 36%. The Fourier Transform Infrared technique performed before and after exposure to Weather-o-meter aging chamber has shown the cleavage of ester groups that are present in acrylic-based resin. The incorporation of 0.10 wt.%, 0.25 wt.%, and 1.00 wt.% increased the photodegradation resistance of the road marking paint inhibiting the ester group and side-chain scissions, since the C-O and C=O band intensity increased after irradiation. The introduction of lignin delayed the yellowing of the aged samples and improved mechanical and photophysical properties besides being a good strategy for the biomass waste utilization of the paper industry.
Highlights
As reported by the National Transportation Confederation (CNT) Yearbook of 2018 (CNT, 2020), the federal paved road network in 2017 in Brazil was 213,452.81 km
Pandey (2005) showed the infrared spectra of Klason lignin isolated from softwood (Pinus roxburghii), and the reported spectrum agrees with that obtained in this study
Adding 0.10 wt.%, 0.25 wt.% and 1.00 wt.% of lignin in paint, the intensity of C-O band increased, indicating a beneficial effect of lignin in the photodegradation resistance of paint, since the results suggest that a scission of ester group did not occur
Summary
As reported by the National Transportation Confederation (CNT) Yearbook of 2018 (CNT, 2020), the federal paved road network in 2017 in Brazil was 213,452.81 km. The CNT report indicates that horizontal and vertical signage was the most deteriorating aspect among paved federal and state highways, with 59.2% of the over 105,000 km evaluated showing problems with lane paintings, lateral and central (CNT, 2020). The road marking paint was nonexistent in 21.4% of the sections that were evaluated (CNT, 2020). The water-based road marking paints have a higher resistance against fire risk, a well dust protection, and a better hygienic conditions during production and application (Fatemi et al, 2006). The acrylic emulsion resins are the basic components of water-based paints
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