Cu thin films on wood surface for robust superhydrophobicity by magnetron sputtering treatment with perfluorocarboxylic acid
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Superhydrophobic wood was fabricated using a magnetron sputtering method, which can be applied to substrates with different shapes for its facile and controllable advantages. Copper was deposited on the cross-section surface of pristine wood followed by a treatment of perfluorocarboxylic acid. The results revealed that the deposition thickness played an important role in varying the surface morphology. In the optimized condition, water contract angle (CA) and sliding angle can reach 154° and 3.5°, respectively, when the deposition thickness was 50 nm. More importantly, the superhydrophobic surface can resist up to 100 times impingement of sand abrasion, and CA retained to be 151°. This method will have promising applications in wooden artifacts, such as clock frame, art, carvings and decorations.
This research was supported by the Fundamental Research Funds for the Central Universities (2572016AB64, 2572018BB05), National Natural Science Foundation of China (31470584 and 31400497), State Key Laboratory of Bio-Fibers and Eco-Textiles (2017kfkt06) and Overseas Expertise Introduction Project for Discipline Innovation, 111 Project (no. B08016).
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