Recently, Hefei University of Technology successfully designed and developed a high-performance biomimetic intelligent nanocomposite hydrogel that can be quickly and efficiently self-healing. Related results were published in the journal Chemistry.
As a soft and highly water-containing material, hydrogels are widely used in sensing and detection, drug release, actuator and tissue engineering. The College of Chemistry and Chemical Engineering of Hefei University of Technology, in collaboration with the research group of the Institute of Colloid and Interface of the Max Planck Institute of the Chinese University of Science and Technology and the Max Planck Institute of Germany, proposed a combination of nano-composite hydrogels and coordination bonds to construct high-performance materials. New strategy. Researchers use monodisperse gold nanoparticles as cross-linkers for the three-dimensional network structure of hydrogels. The gold-sulfur coordination bonds connect the polymer chains to the gold nanoparticles, using the excellent photothermal properties and coordination of the gold nanoparticles. The dynamic instability of the bond at high temperatures has successfully achieved a significant improvement in the self-healing properties of the nanocomposite hydrogel. In addition, a large number of cross-linking sites provided by a large amount of unsaturated gold atoms on the surface of the gold nanoparticles in the material greatly increase the degree of branching of the gel network, making the material have excellent mechanical properties.
The experimental results show that the novel material can achieve 96% self-repair in 1 minute under the induction of near-infrared light with a wavelength of 808 nm. At the same time, the team's biosafety evaluation of the gel showed that the material has good injectability and biocompatibility, and can be used as a drug carrier-loaded anticancer drug for controlled release under near-infrared light.
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