Abstract
Intrinsic superhydrophobic materials exhibit anti-wetting and abrasion-resistant capabilities simultaneously. However, the existing methods are highly restricted to specific synthetic material species. Here, we report a universal method for diverse polymeric materials to one-step prepare intrinsic superhydrophobic objects via a selective laser sintering (SLS) 3D printing technology. Through layer-by-layer sintering accumulation of polymeric powders and polytetrafluoroethylene (PTFE) grains, the intrinsic superhydrophobic 3D objects can be fabricated according to the programmed digital models. The as-printed samples remained anti-wetting capability even after 600 m sandpaper abrasion under 12.5 kPa, illustrating a record-breaking wear-resistant ability. Furthermore, we printed a chemical reaction platform and an underwater wear-resistant water-air transmedia vehicle, indicating the practical applications in harsh environments. Finally, we demonstrate the universality of this method for other eight kinds of polymers-PTFE composite systems. This work will greatly improve the practical application of superhydrophobic materials and promote the development of 3D printing functional materials.
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