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Rapid deposition of superhydrophilic stalagmite-like protrusions for underwater selective superwettability

机译：用于水下选择性超薄的超硫酸盐状突起的快速沉积

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摘要

Selective superwettability has attracted much attention for various applications, especially for fabricating membranes for oil-water separation. However, most approaches were conducted using complicated chemical reactions or processes. In the present study, we developed a facile one-step method to coat hierarchically stalagmite-like protrusions on stainless steel mesh which was repellent to not only oil, but various organic solvents underwater. The modified stainless steel mesh, prepared using an atmospheric pressure plasma technique, showed superhydrophilicity without any further surface elaboration. Due to its strong affinity toward water molecules, it enables the stable entrapment of a water layer on the surfaces of mesh wires against oils. High underwater static contact angles and extremely low roll-off angles towards various oil were exhibited. Notably, the selective superwettability was well preserved even under harsh environments, such as saline water and strong acid solution. Satisfactory separation efficiency for oil-water mixtures was demonstrated in this study. Furthermore, the effect of surface roughness in terms of intrusion pressure was investigated. The effect of surface roughness on intrusion pressure presented here can be applied for various coating materials used in oil-water separation.
机译：选择性超薄可引起各种应用的关注，特别是对于制造用于油水分离的膜。然而，大多数方法是使用复杂的化学反应或过程进行的。在本研究中，我们开发了一种容易的一步法，用于在不锈钢网上涂层等级的石笋状突起，不仅是油的不仅拒绝油，而是水下各种有机溶剂。使用大气压等离子体技术制备的改进的不锈钢网，显示出超级水性而没有任何进一步的表面阐述。由于其对水分子的强烈亲和力，它使得能够稳定地抑制水层对油的滤网表面。展示了高水下静态接触角和朝各种油的极低卷起角度。值得注意的是，即使在恶劣的环境下，选择性超薄是良好的保存，例如盐水和强酸溶液。本研究证明了油水混合物的令人满意的分离效率。此外，研究了表面粗糙度在侵入压力方面的影响。这里呈现的表面粗糙度对侵入压力的影响可以应用于用于油水分离的各种涂料。

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  • 来源
    《RSC Advances》 |2016年第92期|共7页
  • 作者

    Yang Ching-Yu; Lo Yu-Hsiang; Liu Chang; Cheng Hsin-Ming; Duh Jenq-Gong; Chen Po-Yu;

  • 作者单位

    Natl Tsing Hua Univ Dept Mat Sci &

    Engn Hsinchu 101 Sec 2 Kuang Fu Rd Hsinchu 30013 Taiwan;

    Natl Tsing Hua Univ Dept Mat Sci &

    Engn Hsinchu 101 Sec 2 Kuang Fu Rd Hsinchu 30013 Taiwan;

    Natl Tsing Hua Univ Dept Mat Sci &

    Engn Hsinchu 101 Sec 2 Kuang Fu Rd Hsinchu 30013 Taiwan;

    Ind Technol Res Inst Mat &

    Chem Res Labs 195 Sec 4 Chung Hsing Rd Hsinchu 31040 Taiwan;

    Natl Tsing Hua Univ Dept Mat Sci &

    Engn Hsinchu 101 Sec 2 Kuang Fu Rd Hsinchu 30013 Taiwan;

    Natl Tsing Hua Univ Dept Mat Sci &

    Engn Hsinchu 101 Sec 2 Kuang Fu Rd Hsinchu 30013 Taiwan;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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