What is it about?
In this paper, we report that a polyurethane made from non-edible biomass shows better water- and oil-repellent performance than conventional materials, such as polytetrafluoroethylene (PTFE). We also discuss the reasons behind this performance based on the analysis of the coating surface.
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Why is it important?
Liquid-repellent materials that resist water and oil are essential in our daily lives. Most of these materials are fluorinated plastics. However, there is growing concern that harmful substances known as PFAS can be released during the manufacture and use of these plastics, which has become a major social issue. Nevertheless, few alternative materials have been developed.
Perspectives
Our newly developed technology achieves excellent liquid repellency using a completely different approach that does not rely on specific elements like fluorine or silicon, which are commonly used in conventional methods. Specifically, we controlled the structure of the polymer on the surface of the coating to lower its density. This weakens the attraction between the solid surface and liquids, making it easier for water and oil to be repelled.
Ph.D. Yoshihiko Shiraki
Tosoh Corporation
Read the Original
This page is a summary of: Enhancement of the hydrophobicity and oleophobicity of a polyurethane coating using a fluorine‐free polyfarnesene‐based polyol, Journal of Applied Polymer Science, December 2023, Wiley,
DOI: 10.1002/app.55010.
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