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With the rapid development of science and technology, nations worldwide are striving to create more advanced humanoid robots, aiming to integrate them seamlessly into human society. Recently, Canadian scientists have made a breakthrough with a new type of fiber material that brings hope for robots to perform natural and fluid movements in the future.
According to *Applied Chemistry*, researchers from the University of Alberta have developed an innovative "artificial muscle" capable of performing "lifting exercises" in response to changes in air humidity. This remarkable material can lift several times its own weight effortlessly, showcasing great potential for robotic applications.
The artificial muscle is composed of a high-molecular polymeric material that reacts to chemical or physical stimuli. It has promising uses in controlling the movement of soft robots, which are designed to be flexible and gentle, allowing them to handle delicate objects without causing damage and navigate through tight spaces.
The team's "man-made arm" is a thin strip of plastic coated with layers of chromium, gold, and microgels. These microgels, made of cross-linked polymers, swell in solvents and form tiny colloidal particles. By using negatively charged poly-N-isopropylacrylamide microgels and acrylic acid, the researchers created a structure that responds to humidity changes.
When dried, the material contracts due to hydrophobic interactions, causing it to bend upward. As humidity increases, it expands back to its original shape. In experiments, the team tested the material by lifting small objects and found it could support up to 14 times its own weight.
Michael Supey from the University of Alberta explained that this artificial muscle could one day be used to build snake-like robots or develop human-like muscle tissues for humanoid machines. The potential applications are vast, offering a glimpse into a future where robots move more naturally and efficiently alongside humans.