Self-Healing Plastic Repairs Itself When Exposed To Light @PSFK
A new plastic that bleeds and heals like human skin was demonstrated to the American Chemical Society this week. The plastic turns red when it becomes damaged, then repairs itself if exposed to light or temperature changes, with the color fading away as it heals itself.
Bruisable gadgets heal themselves in the sun - tech - 05 April 2012 - New Scientist
Marek Urban and colleagues at the University of Southern Mississippi in Hattiesburg were inspired to create their self-healing plastic by signs of healing in nature such as newly formed tree bark.Earlier self-healing materialsdo not change colour and require focused laser light for repairs. This new material turns red when damaged and repairs itself when exposed to visible light or changes in temperature or pH. It can also fix itself multiple times, unlike previous materials.
New plastics 'bleed' when cut or scratched - and then heal like human skin
New plastics turn red when damaged, then healCredit: Prof. Marek W. Urban, Ph.D.
themselves when exposed to light.
“Mother Nature has endowed all kinds of biological systems with the ability to repair themselves,” explained Professor Marek W. Urban, Ph.D., who reported on the research. “Some we can see, like the skin healing and new bark forming in cuts on a tree trunk. Some are invisible, but help keep us alive and healthy, like the self-repair system that DNA uses to fix genetic damage to genes. Our new plastic tries to mimic nature, issuing a red signal when damaged and then renewing itself when exposed to visible light, temperature or pH changes.”
Urban, who is with the University of Southern Mississippi in Hattiesburg foresees a wide range of potential applications for plastic with warn-and-self-repair capabilities. Scratches in automobile fenders, for instance, might be repaired by simply exposing the fender to intense light. Critical structural parts in aircraft might warn of damage by turning red along cracks so that engineers could decide whether to shine the light and heal the damage or undertake a complete replacement of the component. And there could be a range of applications in battlefield weapons systems.
New Plastic Bleeds Red When Scratched, Then Heals Itself Like Skin | Popular Science
Unlike other self-healing materials, this plastic’s healing process can work over and over, he added. It could serve a variety of purposes, from things like nail polish to self-healing car fenders to airplanes. It would improve safety by drawing attention to a structural defect, and it could repair minor defects in the presence of intense light.
“Where degradation occurs or [there is] mechanical damage, the color would start to change,” Urban said.
The Defense Department funded part of his work.
Related
- Self-healing material - Wikipedia, the free encyclopedia
- Self-healing plastic mimics skin - Health News - Health & Families - The Independent
- Plastic, Heal Thyself: Scientists Invent Smart Polymers : Discovery News
- New bleeding, healing plastic will be used on airplanes, not androids
- Self-healing plastic fixed with a laser's light touch - tech - 20 April 2011 - New Scientist
- New Plastic Mimics Skin's Ability to Bleed, Heal | PCWorld
