3D-Printed Soft Mesh Robots Created
Researchers at North Carolina State University have created 3D-printed flexible mesh structures that can be controlled with applied magnetic fields while floating on water. The structures can grab small objects and carry water droplets, giving them the potential to be useful as soft robots that mimic creatures living on water surfaces or that can serve as tissue scaffolds for cell cultures.
“This research shows capabilities in the emerging field of combining 3D printing and soft robotics,” said Orlin Velev, S. Frank and Doris Culberson Distinguished Professor of Chemical and Biomolecular Engineering at NC State and corresponding author of a paper describing the research.
The video shows a 3D printed water dispenser floating on water surface. The water dispenser is actuated by an external magnetic field.
“This self-reinforced paste allows us to create structures that are ultra-soft and flexible,” said Sangchul Roh, an NC State Ph.D. student in Velev’s lab and first author of the paper.
“Embedding of iron carbonyl particles, which are widely available and have a high magnetization, allows us to impart a strong response to magnetic field gradients,” added Joseph Tracy, professor of materials science and engineering and a senior co-investigator on the project.
“The structures are also auxetic, which means that they can expand and contract in all directions,” Velev said. “With 3D printing, we can control the shape before and after the application of the magnetic field.”
The structures’ properties also allow them to be used while floating on water, similar to water striders, or insects that skim or hop across water surfaces.
“Mimicking live tissues in the body is another possible application for these structures,” Roh said.
In the paper, published in a special issue of Advanced Materials Technologies, the researchers showed how they were able to design reconfigurable meshes, a structure that could “grab” a tiny ball of aluminum foil and a structure that can “carry” a single water droplet and then release it on demand through the mesh.
“For now, this is an early stage proof-of-concept for a soft robotic actuator,” Velev said.
The paper is co-authored by NC State graduate students Lilian B. Okello, Jameson P. Hankwitz and Jessica A.-C. Liu, and undergraduate student Nuran Golbasi.
The research is funded by the National Science Foundation under grants CBET-1604116 and CMMI-1663416.
Contacts and sources:
Mick Kulikowski
Citation: 3D-Printed Silicone Soft Architectures with Programmed Magneto-Capillary Reconfiguration.
Sangchul Roh, Lilian B. Okello, Nuran Golbasi, Jameson P. Hankwitz, Jessica A.-C. Liu, Joseph B. Tracy, Orlin D. Velev. Advanced Materials Technologies, 2019; 1800528 DOI: 10.1002/admt.201800528
Source: http://www.ineffableisland.com/2019/01/3d-printed-soft-mesh-robots-created.html
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