Journal article
A hybrid yellow nanopigment as an environmentally sound alternative to lead chromate pigment for pavement markings
Journal of cleaner production, Vol.319
10/15/2021
Handle:
https://hdl.handle.net/2376/123609
Abstract
This study entails the synthesis of a series of yellow hybrid dye-clay nanopigments (DCNPs) using different yellow cationic dyes, natural, and organomodified montmorillonite. The cationic exchange reaction served as a facile, one-pot, and low-temperature transformation strategy. DCNPs are explored as a type of lead-free eco-friendly pigment to substitute for conventional lead chromate pigment (PbCrO4) for pavement markings. The plate-like DCNP stacks with an approximate hydrodynamic diameter of 2.1 μm were well-dispersed in paint film, forming partially intercalated/exfoliated structure. DCNPs exhibited higher thermal stability, weathering stability, and chemical stability than PbCrO4. DCNPs featured the brilliant yellow shade in pavement marking paint, with the blue-yellow component value (b*) up to 69.9 units. The American pavement marking reference colors can be achieved with a considerably smaller amount of colorant when using DCNP, owing to its exceptional color strength. The cytotoxicity analysis revealed 91%, 66%, and 2% viability of fibroblast cells after a 48h treatment with 0.25 mg/ml natural DCNP, organoclay-based DCNP, and PbCrO4, respectively. In conclusion, the remarkable functional properties and low acute toxicity of the resulting nanopigments suggested the potential application of DCNP as a promising alternative to lead-based pigments in pavement markings.
•A series of hybrid yellow nanopigments (DCNPs) were synthesized.•The preparation process was simple, low-temperature, and environmentally friendly.•DCNPs showed excellent thermal, chemical, and weathering stability.•DCNPs showed a low acute cytotoxicity effect on fibroblast human cells.
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Details
- Title
- A hybrid yellow nanopigment as an environmentally sound alternative to lead chromate pigment for pavement markings
- Creators
- Ali Mahmoodi - Department of Polymer Engineering and Color Technology, Amirkabir University of Technology, P.O. Box 15875-4413, 1591634311, Tehran, IranZahra Jiryaei - Department of Polymer Engineering and Color Technology, Amirkabir University of Technology, P.O. Box 15875-4413, 1591634311, Tehran, IranAyda Dadras - Department of Polymer Engineering and Color Technology, Amirkabir University of Technology, P.O. Box 15875-4413, 1591634311, Tehran, IranManouchehr Khorasani - Department of Polymer Engineering and Color Technology, Amirkabir University of Technology, P.O. Box 15875-4413, 1591634311, Tehran, IranXianming Shi - Laboratory of Corrosion Science & Electrochemical Engineering, Department of Civil & Environmental Engineering, P. O. Box 642910, Washington State University, Pullman, WA, 99164-2910, USA
- Publication Details
- Journal of cleaner production, Vol.319
- Academic Unit
- Civil and Environmental Engineering, Department of
- Publisher
- Elsevier Ltd
- Identifiers
- 99900612058701842
- Language
- English
- Resource Type
- Journal article