Scientists at the University of Texas have developed a technology that allows for the integration of soft and hard materials. This method is inspired by human body engineering and aims to replicate the same principle as, for example, a bone joining cartilage. The potential of the technology is immense. It could completely change the design and manufacturing of prosthetics, wearable medical devices, and robotic technologies.
According to research published in the journal Nature Materials, by using a specially designed printing material and a dual-light system, the technology makes it possible to join soft and hard materials into a single object.
Objects created with this method possess distinct properties. Most importantly, the so-called interface defects, which long limited the creation of functional designs with different materials, no longer appear. An interface defect means weak points and uneven adhesion at the junction of materials. The new 3D printing technique solves this problem because the soft and hard parts are printed simultaneously and seamlessly without any defects.
The study’s authors stated that their goal was to mimic nature’s engineering, to artificially replicate how nature combines materials of different stiffnesses. To achieve this, the scientists used 3D printing technology, and they were successful.
To fully demonstrate the potential of this new technology, the research team created several demonstrative samples, including:
- A miniature knee joint consisting of elastic ligaments and hard bones that moved harmoniously.
- A flexible electronic device, where one part bent, while the other, with an embedded sensitive circuit, remained undamaged despite the movement of the first part.
These examples clearly show how effectively the new technology can integrate materials with different properties (for example, flexible and rigid parts) into a single object.
The technology works quickly and provides better resolution compared to existing methods. This means it can quality-print finer details and precise shapes, which is especially important for creating complex structures.
It is worth noting that this 3D printer is simple to build and its cost is relatively low compared to other similar technologies. For this reason, the technology can be widely distributed because it is simple and economical to use. This, in turn, will allow scientists to actively engage in its development, leading to new achievements in the medical field.
