Everyone has become quite adept at collaborating, and this project has entered the optimization phase, making it easier to understand.
Simply put, Liu Hao and the team chose to use poly(N-isopropylacrylamide) as the temperature-responsive polymer, modifying polyethylene glycol to achieve temperature sensitivity.
Then, using molecular monomers containing Diels-Alder reactions, dynamic covalent bond monomers are formed to realize memory functions.
The synthesis method involves mixing responsive monomers with a cross-linking agent to form a gel through free radical polymerization.
The cross-linking reaction is carried out in solution, forming a uniform gel network. Finally, the gel's network structure is achieved through hydrogen bonds and π-π stacking.
Currently, the best result in the laboratory is achieving more than 70% fracture strength recovery, with self-healing efficiency reaching over 75%.
