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Laser-structured Janus wire mesh for efficient oil–water separation
Nanoscale ( IF 5.8 ) Pub Date : 2017-10-19 00:00:00 , DOI: 10.1039/c7nr06110b Yu-Qing Liu 1, 2, 3, 4, 5 , Dong-Dong Han 1, 2, 3, 4, 5 , Zhi-Zhen Jiao 1, 2, 3, 4, 5 , Yan Liu 3, 5, 6, 7 , Hao-Bo Jiang 3, 5, 6, 7 , Xuan-Hang Wu 1, 2, 3, 4, 5 , Hong Ding 3, 5, 7, 8, 9 , Yong-Lai Zhang 1, 2, 3, 4, 5 , Hong-Bo Sun 1, 2, 3, 4, 5
Nanoscale ( IF 5.8 ) Pub Date : 2017-10-19 00:00:00 , DOI: 10.1039/c7nr06110b Yu-Qing Liu 1, 2, 3, 4, 5 , Dong-Dong Han 1, 2, 3, 4, 5 , Zhi-Zhen Jiao 1, 2, 3, 4, 5 , Yan Liu 3, 5, 6, 7 , Hao-Bo Jiang 3, 5, 6, 7 , Xuan-Hang Wu 1, 2, 3, 4, 5 , Hong Ding 3, 5, 7, 8, 9 , Yong-Lai Zhang 1, 2, 3, 4, 5 , Hong-Bo Sun 1, 2, 3, 4, 5
Affiliation
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We report here the fabrication of a Janus wire mesh by a combined process of laser structuring and fluorosilane/graphene oxide (GO) modification of the two sides of the mesh, respectively, toward its applications in efficient oil/water separation. Femtosecond laser processing has been employed to make different laser-induced periodic surface structures (LIPSS) on each side of the mesh. Surface modification with fluorosilane on one side and GO on the other side endows the two sides of the Janus mesh with distinct wettability. Thus, one side is superhydrophobic and superoleophilic in air, and the other side is superhydrophilic in air and superoleophobic under water. As a proof of concept, we demonstrated the separation of light/heavy oil and water mixtures using this Janus mesh. To realize an efficient separation, the intrusion pressure that is dominated by the wire mesh framework and the wettability should be taken into account. Our strategy may open up a new way to design and fabricate Janus structures with distinct wettability; and the resultant Janus mesh may find broad applications in the separation of oil contaminants from water.
中文翻译：
激光结构的Janus丝网可实现有效的油水分离
我们在此报告通过对网格的两侧进行激光结构化和氟硅烷/氧化石墨烯（GO）修饰的组合工艺来制造Janus丝网，以实现其在有效油/水分离中的应用。飞秒激光加工已被用来在网的每一侧制作不同的激光诱导的周期性表面结构（LIPSS）。一侧用氟硅烷进行表面改性，另一侧用GO进行表面改性，使Janus筛网的两侧具有明显的润湿性。因此，一侧在空气中是超疏水的和超亲油的，而另一侧在空气中是超亲水的和在水下是超疏油的。作为概念验证，我们演示了使用此Janus网格分离轻质/重质油和水混合物的方法。为了实现有效的分离，应考虑由丝网框架和润湿性决定的侵入压力。我们的策略可能会为设计和制造具有明显润湿性的Janus结构开辟一条新途径。最终的Janus筛网可能会在分离水中的油污中找到广泛的应用。
更新日期：2017-11-23
中文翻译：
激光结构的Janus丝网可实现有效的油水分离
我们在此报告通过对网格的两侧进行激光结构化和氟硅烷/氧化石墨烯（GO）修饰的组合工艺来制造Janus丝网，以实现其在有效油/水分离中的应用。飞秒激光加工已被用来在网的每一侧制作不同的激光诱导的周期性表面结构（LIPSS）。一侧用氟硅烷进行表面改性，另一侧用GO进行表面改性，使Janus筛网的两侧具有明显的润湿性。因此，一侧在空气中是超疏水的和超亲油的，而另一侧在空气中是超亲水的和在水下是超疏油的。作为概念验证，我们演示了使用此Janus网格分离轻质/重质油和水混合物的方法。为了实现有效的分离，应考虑由丝网框架和润湿性决定的侵入压力。我们的策略可能会为设计和制造具有明显润湿性的Janus结构开辟一条新途径。最终的Janus筛网可能会在分离水中的油污中找到广泛的应用。
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