It’s amazing to consider the long-term potential of carbon nanotubes as a polymer reinforcement if major issues (cost and health concerns) can be overcome. Research reveals the possibility of cross-linking CNT molecules prior to incorporation in a polymer matrix to form a super composite with a tensile strength of 20 million psi. Single-walled nanotubes exhibit unique electric properties and may be used for miniaturizing electronics beyond the micro electromechanical scale. Big producers are placing major bets on the technology. In Japan, Showa Denko is building a 400 million metric tons per year production plant. In Germany, Bayer is building a 200 million metric tons per year plant. They’re betting they can dramatically reduce the cost of CNTs which had been in the stratosphere as a pilot scale product, say $40,000 per pound. Multiwall nanotubes are down to $50 to $70 per pound now. Prices will drop as new plants come on line. Health issues must also be addressed.
HP revealed more of its 3D printing plans in a recent webinar. Senior vice president of inkjet and graphics solution business Stephen Nigro spoke about how the technology works and expanded on HP's vision of open collaboration to commercialize its Multi Jet Fusion 3D printing technology for end-production, and open collaboration on new materials. He also said HP will create software to help users decide when to use Multi Jet Fusion versus conventional subtractive manufacturing.
A lightweight electric urban concept car designed by several European companies weighs only 992 lb without its battery. It would have weighed 26.7 lb more if its windows were made of glass instead of the specially coated LEXAN polycarbonate resin from SABIC Innovative Plastics.
Skylar Tibbits' team in MIT's Self-Assembly Lab is now 4D printing self-assembling shapes made of programmable carbon composites and custom wood grain. The composites are being used in a sport car airfoil, and the wood grain is beautiful.
The NanoSteel Company has produced high-hardness ferrous metal matrix composite (MMC) parts using a new nanosteel powder in a one-step 3D-printing process. Parts are 99.9% dense, crack-free, and with wear resistance comparable to M2 tool steels.
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