Researchers from Concordia University, Montreal, are exploring the 3D printing of graphene oxide liquid crystals to enable materials with previously-unseen levels of strength. Having made headlines for over a decade, graphene is one of those wonder materials that promised to solve a number of our engineering challenges. The sheet-form carbon allotrope comprises a single layer of atoms arranged in a 2D nanostructure resembling a honeycomb lattice. The material is known for its high strength-to-weight ratio, excellent thermal and electrical conductivity, corrosion resistance, and scratch-resistant qualities. Unfortunately, we haven’t yet been able to translate graphene’s strength from the microscale to real-world applications in the macroscale. The Concordia team is now using photocuring, the technology behind stereolithography 3D printing, to produce self-assembled graphene oxide structures that are both larger and more complex than today’s possibilities. A large graphene oxide sheet produced via photocuring, the process behind resin 3D printing. Photo via Concordia… read more
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California and Arizona based battery company Ampcera Inc. has been awarded funds to develop 3D printed lithium-ion batteries. Ampcrea, along with partners at Lawrence Livermore National Laboratory (LLNL) have received $1.5 million USD in funding from the Department of Energy to develop a safer lithium battery with higher power and energy densities using a low-cost dry additive manufacturing process. Ampcera deals with the development and commercialization of high-performance solid-state electrolyte materials for next-generation lithium batteries. It is hoped that the partnership with the national laboratory will develop innovative manufacturing processes for lithium-ion batteries and reduce time-to-market. In addition, the process is apparently “environmentally benign” , which is why it is one of six Energy Systems projects selected for an award from DOE’s Advanced Manufacturing Office to reduce industrial emissions and manufacture clean energy technologies. The proposed dry additive manufacturing technology is highly energy-efficient with more than 10 times the throughput… read more
Scientists at the University of Houston have developed a novel method of 3D printing bio-sensors that could one day be implanted into human hosts. Using multiphoton lithography (MPL), the team’s approach involves polymerizing a resin loaded with an organic semiconductor material layer-by-layer, to form tiny, biocompatible circuit boards. Thus far, the researchers have utilized their process to create highly-accurate glucose sensors, but with further R&D, they believe it could pave the way for the production of a new generation of bio-electronic devices. “Here, a homogenous and transparent photosensitive resin doped with an organic semiconductor (OS) material is introduced to fabricate a variety of 3D OS composite microstructures (OSCM),” say the team in their paper. “[Our] results demonstrate the great potential of these devices for a wide range of applications from flexible bioelectronics, to nanoelectronics and organ-on-a-chip devices.” The researchers’ initial 3D printed microstructures. Image via the University of Houston. Bringing… read more
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