415947 A Novel Mussel-Inspired Superhydrophobic Cloth Boat for Self-Driven Crude Oil Spill Cleanup

Sunday, November 8, 2015
Exhibit Hall 1 (Salt Palace Convention Center)
Zhenxing Wang, Harbin Institute of Technology, Harbin, China and Lu Shao Sr., Harbin Inst Technol, Harbin, China

Superhydrophobic fabric was simply prepared by a novel mussel-inspired strategy at a much lower concentration of dopamine with the aid of folic acid (FA), avoiding the use of any additional nanoparticles. Intriguingly, different from the additional nanoparticles, FA takes the role of structure directing agents for preparation rough polydopamine (pDA) coatings, and such hierarchical structures can be readily controlled by adjusting the FA concentrations or the coating duration. Higher FA concentration is adverse to formation of obvious hierarchical structure because of the inhibition effect of FA on the pDA formation, while appropriate duration of Stage I is indispensable for construction of rough pDA coatings. After octadecylamine (ODA) chemical manipulation, the as-prepared cloth boat with hierarchical structure exhibits excellent superhydrophobicity and the water contact angle and rolling off angle were about 162o and 7o, respectively. Importantly, the superhydrophobic fabric can withstand continuous and drastic 3.5 wt.% NaCl solution rinse and repeated tear with adhesive tape more than 30 times, exhibiting the excellent durability. Moreover, an energy-saving and highly efficient mini boat fabricated by our novel superhydrophobic fabric was innovatively utilized for self-driven oil spill cleanup, which can automatically recycle crude oil spill while float freely on water with the cleanup rate of crude oil spill up to 97.1%, demonstrating great potential in environmental remediation. The novel strategy designed in this study can inspire the fast development of mussel-inspired superhydrophobic materials for applications in various fascinating fields.

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