School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea.
School of Mechanical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea; Department of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, PR China.
Water Res. 2018 Nov 15;145:640-649. doi: 10.1016/j.watres.2018.09.012. Epub 2018 Sep 5.
We demonstrate a hydrogel bowl capable of selectively and rapidly collecting spilled oil while floating on water. The bowl has macroscopic openings in its sidewall, and its surface is first coated with octadecyltrichlorosilane (OTS) and then with diffusion pump oil, which imparts exceptional hydrophobic, oleophilic, and high oil wettability properties. The use of a hydrogel makes it possible to obtain surface hydrophobicity and oleophilicity, while also being inexpensive, eco-friendly, and easy to fabricate. Using a prototype of the bowl and a small pump system, we demonstrate that oils with a broad range of viscosities (2.7-2000.0 cSt at 20-40 °C) are more rapidly and efficiently collected from the surface of both pure water and seawater than with any other reported technique. The hydrogel bowl can collect oil for more than one month without losing its efficiency and can be stored in oil for reuse. Therefore, such hydrogel bowls represent a new alternative to conventional oil spill remediation techniques.
我们展示了一种能够在水面上漂浮的水凝胶碗，它能够选择性地快速收集溢出的油。碗的侧壁有宏观开口，其表面首先涂有十八烷基三氯硅烷（OTS），然后涂有扩散泵油，这赋予了它非凡的疏油性、亲油性和高油润湿性。使用水凝胶可以获得表面疏油性和亲油性，同时还具有成本低、环保和易于制造的优点。我们使用碗的原型和一个小型泵送系统，证明了与任何其他报道的技术相比，该碗能够更快速、更有效地从纯水和海水面上收集各种粘度的油（2.7-2000.0 cSt，20-40°C）。这种水凝胶碗可以持续收集油一个多月而不会降低效率，并且可以储存在油中以备重复使用。因此，这种水凝胶碗为传统的溢油修复技术提供了一种新的替代方案。
