A Universal Toughening and Energy-Dissipating Strategy for Impact-Resistant 3D-Printed Composites.

ABSTRACT: 3D-printed polymer-based composites are promising for various engineering applications due to high strength-to-weight ratios and design flexibility. However, conventional matrix materials, such as polylactic acid and epoxy resin, often exhibit brittleness and limited impact resistance (< 10 kJ m^{- 2}). Herein, a universal strategy is reported for enhancing the ductility and impact energy absorption of 3D-printed composites by leveraging the dynamic crosslinking of B─O dative bonds. To validate its effectiveness, a smart composite (PLA/SSG) comprising shear-stiffening gel fillers embedded in a polylactic acid matrix is designed and its rate-dependent mechanical adjustability along with 3D printability is evaluated. The resulting composite shows significant improvements i

SUBMITTER: Hong X 

PROVIDER: S-EPMC12224963 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature