Construction of mechanically robust and fire safe thermoplastic polyurethane-based nanocomposites for electromagnetic interference shielding

•High-performance multifunctional hierarchical TPU-based nanosystem are prepared.•Nanocomposites has high fire safety, mechanical robustness and EMI shielding.•Properties of hierarchical nanocomposite are superior to those previously reported.•Hydrogen bond, charring and continuous network lead to properties improvement.