Tag Archives: 3D printing

3D-Printed Mars Habitat Competition

The lander seals to the ground to provide a protected, pressurised environment for the structure to be printed. Once complete, the lander would lift its legs to reveal the structure and move on to the next location to build another, creating a small series of rooms.

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AI spacefactory came in second place, presenting an egg-shaped structure, designed with a double shell to combat the aggressive thermal effects of mars. Like the zopherus habitat, the team envisions the marsha design to use materials sourced from mars including basalt fibre, extracted from martian rock, and renewable bioplastic (polylactic acid) derived from plants that could be grown on the planet.

Source: https://www.designboom.com/

Colorful 3D Printing

People are exploring the use of 3D printing for wide-ranging applications, including manufacturing, medical devices, fashion and even food. But one of the most efficient forms of 3D printing suffers from a major drawback: It can only print objects that are gray or black in color. Now, researchers have tweaked the method so it can print in all of the colors of the rainbow.

THIS BRIGHTLY COLORED DRAGON WAS PRODUCED BY 3D PRINTING, USING GOLD NANORODS AS PHOTOSENSITIZERS.

Selective laser sintering (SLS) printers use a laser to heat specific regions of a powdered material, typically nylon or polyamide, so that the powder melts or sinters to form a solid mass. The printer adds then selectively sinters new powdered material layer by layer until the desired 3D structure is obtained. To reduce the energy requirements of the process, researchers have added compounds called photosensitizers to the polymer powders. These materials, such as carbon nanotubes, carbon black and graphene, absorb light much more strongly than the polymers and transfer heat to them, enabling the use of cheaper, lower-power lasers. However, the carbon-based photosensitizers can only produce printed objects that are gray or black. Gerasimos Konstantatos, Romain Quidant and their coworkers at The Institute of Photonic Sciences (IFCO) wanted to find a photosensitizer that would enable color printing by the SLS method.

The researchers designed gold nanorods to strongly absorb in the near-infrared region of the spectrum while being almost transparent to visible light. They coated them with silica and then mixed them with polyamide powders to print 3D objects. They found that the gold nanorods were much better at converting light from the laser to heat than carbon black, the industry standard. Also, the new photosensitizers could produce much whiter and — when mixed with dyes — brightly colored 3D objects. Importantly, the materials are cost-effective for large-scale production. The researchers have filed several patent applications related to the new technology.

The findings are reported in the ACS journal Nano Letters.

Source: https://www.acs.org/

3D Printed House Built In 24 Hours For $4000

US construction technologies firm Icon has demonstrated a method for 3D printing a single storey house in less than 24 hours.

The small company – which is hoping to pioneer the use of 3D printing for homebuilding – has unveiled a 650 square foot (61 m2)  home in Austin, Texas that was built using its Vulcan 3D printer, which builds structures by depositing layers of specially formulated cement.

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The firm claims that it can print an entire home for $10,000 but that costs could ultimately be brought as low $4000.

It has now joined forces with housing charity New Story to further develop the technology and use it to build affordable homes in parts of the developing world. The two companies reportedly plan to work together to build around 100 3D printed homes in El Salvador.

Source: https://www.iconbuild.com/
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https://www.theengineer.co.uk/