Self-Healing Coating

clipped from www.mailonsunday.co.uk The scratch-proof car: Scientists create coating that repairs itself in the sun in 30 minutes Scientists claim to have invented a 'self-healing' coating that repairs scuffs or blemishes on paint when exposed to sunlight. clipped from blogs.discovermagazine.com Self-Healing Coating Could Make Scratch-Proof Cars clipped from www.fastcompany.com clipped from www.nytimes.com Polymer Coating Heals Itself Biswajit Ghosh and Marek W. Urban of the University of Southern Mississippi have come up with another approach, which they describe in a paper in Science. With their method, what breaks is not a sphere, but a ring-shaped chemical, oxetane, that is incorporated in the polyurethane polymer. Another compound in the polymer, chitosan, forms cross-links at the places where the oxetane breaks, healing the scratch. clipped from www.papamiket.com Papa Mike's Blog clipped from www.rsc.org The team demonstrated that a hairline crack - around 10 micrometres in thickness - could be completely knitted back together under bright UV light in around 30 minutes. However, they have not yet investigated more complex damage or deeper scratches.

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Dr. Marek W. Urban
Self-Repairing Oxetane-Substituted Chitosan Polyurethane Networks -- Ghosh and Urban 323 (5920): 1458 -- Science