Recently, a new type of anisotropic hydrogel driver with self-healing ability was successfully developed at Hefei University of Technology, which opened up a theoretical path for the preparation of new soft materials needed in the fields of artificial muscles and soft robots. Related results were published in "Nature-Newsletter".
Most tissues of organisms have anisotropic morphology and structure at all levels from molecular to macroscopic scale, so as to achieve behavior and function in specific directions. The research and development of soft materials with anisotropic network structure is the key and technical bottleneck of new flexible intelligent driving devices in the future.
Hefei University of Technology professor Huaiping Cong teamed up with Professor Yu Shuhong of the University of Science and Technology of China to use the controlled two-dimensional assembly structure of metal nanoparticles as a crosslinking agent in the process of polymer radical polymerization and induce polymer chain growth Design strategy, successfully developed a polymer / nanocomposite hydrogel with a highly ordered layered network structure. Using the shrinkage behavior of the polymer chain of the gel network in poor solvents, this new material can achieve shrinkage and tensile deformation in specific directions such as horizontal and vertical.
The team proposed a new type of repair-induced integrated device assembly method that achieves complex driving behaviors such as robotic arm lifting and robotic gripping. At the same time, the material has the ability to respond quickly and efficiently to repair. Under the stimulation of laser or acidic solution, the damaged part can quickly realize self-healing, which has the advantages of long service life and high safety. (Reporter Yang Baoguo Correspondent Zhou Hui)
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