CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.
Nanoscale. 2017 Oct 26;9(41):15796-15803. doi: 10.1039/c7nr03829a.
Porous oil/water separation materials show excellent prospects in the remediation of oil spill accidents. However, several drawbacks such as low flux, limited absorption and storage capacity restrict their practical applications. Hence, a novel Janus oil barrel (superhydrophobic outside wall and superhydrophilic inside wall) constituted by tapered microhole arrayed aluminium foil is designed, which is demonstrated to be a promising device for the remediation of oil spill accidents. Furthermore, the investigation shows that the tapered microholes (taper angle 25-30°) can significantly enhance oil/water intrusion pressures (1-3 times higher than cylindrical holes) and unidirectional transferability which can eliminate the secondary leakage when salvaging full oil barrels without an additional procedure. It is indicated that the Janus oil barrel can spontaneously absorb spilled oil with a high flux (45 000 Lm h), and synchronously store the absorbed oil. In addition, the barrel can absorb oil from surfactant-free oil-in-water emulsions appearing in oil spills and industrial processes. The distinct design combining excellent controllability, high precision and flexibility of the femtosecond laser micro/nanofabrication technology provides a general strategy in oil spill remediation.
多孔油水分离材料在溢油事故的修复中具有广阔的应用前景。然而，通量低、吸收和储存能力有限等缺点限制了其实际应用。因此，设计了一种新型的 Janus 油桶（超疏水外壁和超亲水内壁），由锥形微阵列铝箔组成，被证明是一种有前途的溢油事故修复装置。此外，研究表明，锥形微孔（锥角 25-30°）可以显著提高油水侵彻压力（比圆柱形孔高 1-3 倍）和单向传递性，在没有额外程序的情况下，当打捞满桶油时，可以消除二次泄漏。结果表明，Janus 油桶可以自发地以高流量（45000 Lm h）吸收溢油，并同时储存吸收的油。此外，该桶还可以吸收出现在溢油和工业过程中的无表面活性剂的水包油乳液中的油。飞秒激光微纳制造技术的卓越可控性、高精度和灵活性的独特设计为溢油修复提供了一种通用策略。
