3D Printed Functional and Biological Materials on Moving Freeform Surfaces

Area of Science:

• Robotics and Automation
• Materials Science and Engineering
• Biomedical Engineering

Background:

• Conventional 3D printing relies on static, open-loop systems requiring pre-calibration.
• Fabrication on dynamic or freeform surfaces presents significant challenges for traditional methods.
• Need for advanced manufacturing techniques capable of real-time adaptation.

Purpose of the Study:

• To introduce and demonstrate adaptive 3D printing as a closed-loop fabrication method.
• To enable the creation of functional devices on moving, freeform surfaces.
• To explore applications in wearable electronics and biomedical treatments.

Main Methods:

• Integration of a robotic system with computer vision for real-time workspace perception.
• Closed-loop control combining direct ink writing with feedback.
• Hybrid fabrication: 3D printing of electrical connections and automated component placement.
• Application of adaptive printing on free-moving human hands and live mice.

Main Results:

• Successful fabrication of functional electronic devices on a moving human hand.
• Demonstration of printing cell-laden hydrogels on live mice for wound healing models.
• Validation of adaptive 3D printing's capability to handle dynamic geometries and motions.

Conclusions:

• Adaptive 3D printing offers a novel approach for fabricating complex devices on unconventional surfaces.
• This technology has potential for on-body wearable electronics and advanced regenerative medicine.
• Opens new avenues for smart manufacturing and personalized medical interventions.