Researchers from the Khalifa University of Science and Technology in Abu Dhabi are investigating the 3D printing of multifunctional optical fibers. Using polymer-based stereolithography (SLA) technology, the team 3D printed a set of optical fiber designs and integrated thermochromic micro-powder pigments, making them responsive to changes in temperature. At the same time, owing to the optical properties of the fibers, the researchers also managed to endow their designs with strain sensing capabilities. By exhibiting sensitivity to two stimuli simultaneously, the 2-in-1 optical fibers show great promise in biomedical and healthcare applications for remote temperature and strain sensing devices. The research paper writes, “This work may pave the way towards developing tunable thermochromic sensors that are cost-effective, reusable, and flexible.” The Khalifa University campus. Photo via Khalifa University of Science and Technology. Additive manufacturing for sensing applications The list of temperature sensor use cases is a long one, including medical diagnostic… read more
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Hemp has historically been used for a wide range of applications spanning from rope production and textile manufacture, through to more modern day applications such as its usage in hemp-based plastics. Hemp fibers are very strong, you see, and they are also very cheap. It has also been used as a construction material named Hempcrete for quite some time (thousands of years in fact), and now Hempcrete is getting the AM treatment thanks to a team of researchers at Texas A&M University. “No officer, those are my building materials.” (Image credit: Texas A&M University) The researchers, funded by a $3.74 million grant from the Department of Energy, are now planning to 3d print buildings with millenia-old building material. Hempcrete consists of hemp particulate, lime and sand. The project is funded under the HESTIA program which aims to increase the total amount of carbon stored in buildings to create carbon sinks,… read more
Biomaterials developer Jellatech has announced a new milestone in the development of its 3D printable cell-based collagen bioink. After two years of development, the company has successfully engineered a full-length, triple-helical and functional collagen made from its own proprietary cell lines. “This is a major milestone for us and I am beyond proud and excited that we are already here,” said Stephanie Michelsen, CEO of Jellatech. “Being able to see our clean cell-based collagen with the naked eye – it brings happy tears.” Jellatech’s pure, white collagen in powder form. Photo via Jellatech. 3D printing with collagen Collagen is one of the most unique and abundant proteins in mammals found in connective tissue, skin, tendon, bone, and cartilage. It provides structural support to tissues and plays an important role in cellular processes like tissue repair, immune response, and cell migration. Collagen’s properties have led to it being widely used across… read more
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Space architecture firm AI SpaceFactory has unveiled their plan for a lunar habitat, which has been designed for additive manufacturing on the Moon’s surface. The lunar structure concept, named “LINA” has been designed with inputs from engineers at NASA’s Kennedy Space Center, and marks the first time that the agency has collaborated with a private partner in lunar habitat design. Regolith all over it (Image credit: AI SpaceFactory) LINA’s will be 3D printed with a lunar regolith polymer composite made with materials found or manufactured on the Moon, and the structures will feature an ultra-thin shell with 3d printed load-bearing arches. The thin structure will be buried under a 2.7-meter thick, protective regolith overburden. The result is a lightweight, mass optimized structure that functions as defense against radiation and the extreme lunar environment. LINA is proposed to be situated at Shackleton Crater, on the Moon’s south pole, which contains water… read more
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