Durable resin-based slippery coating with stable lubricating layer enabled by dual-bridging design

• A dual-bridging design is presented to prepare a durable slippery coating. • The coating shows a good slippery property after sequential wear and shear. • The coating exhibits a robust anti-bacterial adhesion. Slippery liquid-infused porous coating (SLIPC) has aroused considerable attention because of its broad potential applications, but it remains challenging to simultaneously achieve a stable lubricating layer and mechanical robustness in one coating. Herein, a dual-bridging design strategy is proposed to create a SLIPC, in which amino-terminated polydimethylsiloxane (NH 2 -PDMS) is grafted onto rod-like cellulose and then incorporated into epoxy resin. Owing to the ability of NH 2 -PDMS to participate in the crosslinking reaction of the epoxy resin, the cellulose exhibits a strong bonding strength with the resin, thereby enhancing the toughness of the coating to prevent cracking. Moreover, due to the strong van der Waals interactions between NH 2 -PDMS and lubricating silicone oil, a stable lubricating layer can form on the coating surface. Therefore, a high-performance SLIPC with a very low water sliding angle (WSA) of 0.7° is successfully prepared. The durability and robustness endow the coating with a low WSA of 2.3° even when subjected to sandpaper abrasion for 1000 cm and high-speed shear at 8000 r min −1 in sequence. The robust anti-bacterial adhesion property of the SLIPC is also demonstrated. We envision that the SLIPC will boost practical applications of slippery coatings in harsh environments.