A new type of plastic that mimics human skin changes color first to show damage from cuts and scratches, then heals itself when exposed to light or changes in temperature or pH.
(Source: Professor Marek W. Urban, University of Mississippi)
William, thanks for your comment. I agree with you about this not being likely for consumer-grade use. We addressed this issue earlier in the thread: since this is not close to commercial development yet, price and cost differentials are unknown. But self-healing plastics like this one--which unusually can self-heal multiple times--multiply the life of the object several times. Less plastic gets used during that time, so the COO to manufacturers would be lower than buying it once. It's not aimed at high-volume, low-cost throwaway applications, but ones where continued use of a high-value product is important, such as military or medical products.
It would be quite useful to know some of the more common materials propertiies of this self healing material, such as strength, stiffness, and temperature ratings, and that all important property, PRICE. My guess is that it would never be found in consumer goods evenif the cost were half that of styrene regrind. It appears that many consumer goods have avery intentional low quality level, so that they would be replaced every few months.
ChasChas, thanks for that comment. I agree with you. I've reported on several other experimental materials that seem to be moving toward intelligence, some of them via nanotechnology, and many of them based on shifts in electrical charge.
Nadine, thanks for the clarification. Since this material is aimed at self-repairing surface damage, I don't think it's designed for implants. But that's an interesting idea. There are many biocompatible plastics made for that application, and designing one of those to be self-healing would be a good PhD project.
Ann: I'm thinkiing specifically about joint replacement. I had the honor to attend an orthopaedic surgeons conference a few months ago. The technology is very interesting and has been making slow advances, especially in hip replacements. Even temperature and PH changes would be problematic for spine, knee and hip replacements.
But, it may cause less trauma than entirely replacing the unit.
Meanwhile, these new plastics are only a drop in the huge bucket of the amount of plastics we consume. So extending the life of non-recyclable, non-compostable plastics by reusing them helps keep them out of the landfill.
Nadine, intense light is one possible exposure mechanism--the article also mentions changes in temperature or pH. I'm not sure why strong light would be a problem for an implant, since an implant is usually kept away from light. Can you tell us more about what you mean?
A new service lets engineers and orthopedic surgeons design and 3D print highly accurate, patient-specific, orthopedic medical implants made of metal -- without owning a 3D printer. Using free, downloadable software, users can import ASCII and binary .STL files, design the implant, and send an encrypted design file to a third-party manufacturer.
A recent report sponsored by the American Chemistry Council (ACC) focuses on emerging gasification technologies for converting waste into energy and fuel on a large scale and saving it from the landfill. Some of that waste includes non-recycled plastic.
Capping a 30-year quest, GE Aviation has broken ground on the first high-volume factory for producing commercial jet engine components from ceramic matrix composites. The plant will produce high-pressure turbine shrouds for the LEAP Turbofan engine.
Seismic shifts in 3D printing materials include an optimization method that reduces the material needed to print an object by 85 percent, research designed to create new, stronger materials, and a new ASTM standard for their mechanical properties.
A recent study finds that 3D printing is both cheaper and greener than traditional factory-based mass manufacturing and distribution. At least, it's true for making consumer plastic products on open-source, low-cost RepRap printers.
For industrial control applications, or even a simple assembly line, that machine can go almost 24/7 without a break. But what happens when the task is a little more complex? That’s where the “smart” machine would come in. The smart machine is one that has some simple (or complex in some cases) processing capability to be able to adapt to changing conditions. Such machines are suited for a host of applications, including automotive, aerospace, defense, medical, computers and electronics, telecommunications, consumer goods, and so on. This discussion will examine what’s possible with smart machines, and what tradeoffs need to be made to implement such a solution.