Bio-polyurethane synthesised by renewable Jatropha oil

Researchers have presented a novel biomass polyurethane-based composite coating with superior radiative cooling, anti-corrosion and recyclability for surface protection.

A Jatropha plant.
During the study Image source: Akramarm - Pixabay (symbol image).

Towards the irreversible increase of energy demands, the development of non-fossil, bio-renewable, and sustainable resources has become a necessary and important strategy. Now, a biomass polyurethane (PU) prepolymer derived from Jatropha oil (JO) resource was successfully synthesised. To endow this bio-PU material with desired functionalities, the hybrid nanoparticles with different proportions of barium sulfate (BaSO4) and titanium dioxide (TiO2) were incorporated into PU matrix. After UV curing treatment, the resultant composite coatings possessed superior UV blocking and infrared radiative cooling properties.

Excellent anti-corrosion

Besides, the coatings exhibited excellent anti-corrosion even immersing in strong acid, alkali, and salt solutions for 30 days, and the recyclability and secondary use of this coating was synchronously confirmed through the repeated processing. Finally, the adhesion of these coatings on the surface protection of multiple materials was demonstrated, including metal, plastic, wood, and glass substrates.

The study has been published in Progress in Organic Coatings, Volume 174, January 2023.

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