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7933176 
Journal Article 
Bio-based omniphobic polyurethane coating providing anti-smudge and anti-corrosion protection 
Liang, Y; Zhang, D; Zhou, M; Xia, Y; Chen, X; Oliver, S; Shi, S; Lei, Lei 
2020 
1 
Progress in Organic Coatings
ISSN: 0300-9440 
148 
English 
WOS:000573041700009 
Herein, a novel omniphobic polyurethane (PU) coating has been prepared from bio-based acetylated starch (ac-Starch) as the polyol and hexamethylene diisocyanate trimer (HDIT) as the cross-linking agent. A small amount of monocarbinol terminated polydimethylsiloxane (PDMS−OH), as a lubricating ingredient, is introduced into the coating through covalent attachment with excess HDIT to prevent large scale phase separation with other coating components. By adjusting PDMS content (0.5–3.0 wt.%), ac-Starch based PU coatings with high transparency (>97 %) and excellent anti-smudge properties are obtained. Specifically, various liquid contaminants such as inks, water- and oil-based substances are easily removed from the coating surface, either through “sliding-off” or “beading” and “wiping-off” without any traces left behind. In addition, these coatings could provide anti-corrosion properties for metal surfaces. Thus, such bio-based “green” coatings with omniphobic properties are promising for protecting surfaces from contamination and corrosion, which is critical for the sustainable development of functional coating materials. 2020 Elsevier B.V. 
Acetylated-Starch; PDMS; Polyurethane coating; Anti-Smudge; Anti-Corrosion