Love to see these efforts around creating renewable versions of proven materials and carrying over many of the same characteristics so they have high utility for materials engineers. Makes it very easy to go the sustainability route when the choices are just part of good, everyday design practices.
@Ann: Are you sure that the density is 1.45 g/cm³? This is equivalent to 90 pounds per cubic foot. At this density, the foam would sink in water. The density of a typical polyurethane sound-absorbing foam is around 2 pounds per cubic foot (about 0.03 g/cm³). Are you sure the density wasn't given in U.S. units, rather than metric units?
Generally, the sound absorption of foams depends on the frequency of the sound. Any indication of what frequency range this foam is best suited for?
Also, any word on whether Dow has any plans to market this material in sheet form? Or will it be sold only as an injectable cavity foam?
Finally, how does the cost of the soy-based polyurethane compare to petroleum-based polyurethanes? This will definitely be a big factor in its acceptance.
I also think it's cool that this cavity foam using a non-food renewable material that's a byproduct of food production. Many materials companies are getting on the bandwagon to ensure that their feedstocks are really green: both renewable and non-competitive with the human food supply.
@Ann: Calling soybean oil a "byproduct of food production" rather than a food product is a little disingenuous. Soybean oil is one of the most widely-consumed cooking oils.
It's true that the soy flakes, which remain after the oil is extracted, are used as animal feed (and for soy protein for human consumption). Using the oil as an industrial feedstock wouldn't affect this use.
Of course, soybean oil is already widely used in industry -- for instance, it's used to make ink -- and it seems unlikely that the (relatively) small amount of additional soybean oil which would be used to make these foams would have any impact on the price or supply of cooking oil.
Dave, the spec Dow provided was 1.45 gm/cc. Note that that's 25 percent less dense than the previous product at 2.0 gm/cc. James did not provide price details, or mention sheet forms of this product or any other future plans regarding it.
Dave, at least one of the specs were on their presentations and they were also given in the interview. I find it tough to believe that anyone at Dow would mistake units of measurement. I've sent an email asking them to verify the spec.
We've just heard back from Allan James, the person I interviewed at Dow. The spec he gave me was, in fact, wrong--thanks to Dave Palmer for pointing that out. James says the correct measurements are 1.45 pcf for BETAFOAM Renue and 2.0 pcf for the product being replaced.
A make-your-own Star Wars Sith Lightsaber hilt is heftier and better-looking than most others out there, according to its maker, Sean Charlesworth. You can 3D print it from free source files, and there's even a hardware kit available -- not free -- so you can build one just in time for Halloween.
Some next-generation bio-based materials are superior in performance to their petro-based counterparts, but also face some commercial challenges. This is especially true of certain biopolymers, adhesives, coatings, and advanced materials.
Cars and other vehicles, as well as electronics and medical devices, continue to lead the use cases for the new plastics products we've been seeing, as engineers design products for tougher environments.
LeMond Composites, founded by three-time Tour de France cycling champion Greg LeMond, is the first to license a new carbon fiber production method invented by Oak Ridge National Laboratory (ORNL) that's faster, cheaper, and greener.
This month will mark the launch of the SpeedFoiler, a super-fast, ultra-lightweight foiling catamaran that can fly short distances over water faster than other foiling designs, in part because of its carbon composite materials.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies.
You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived.
So if you can't attend live, attend at your convenience.