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首页> 外文期刊>Journal of Hazardous Materials >Enabling phase transition of infused lubricant in porous structure for exceptional oil/water separation
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Enabling phase transition of infused lubricant in porous structure for exceptional oil/water separation

机译：使注入的润滑剂在多孔结构中发生相变，从而实现出色的油/水分离

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摘要

The fundamental mechanism behind oil/water separation materials is their surface wettability that allows either oil or water to pass through. The conventional materials for oil/water separation generally have extreme wettability, namely superhydrophilic for water separation and superhydrophobic for oil separation. Using easily accessible materials that are medium hydrophobic or even relatively hydrophilic for preparing highly efficient oil/water separators have rarely been reported. In this work, a new strategy by triggering phase transition of infused lubricant from liquid to solid state in porous structure is realized in fabricating slippery lubricant infused porous structure for oil/water separations. By infusing polyester fabric with coconut oil, after phase transition, excellent water repellency and oil permeability by an absorbing-permeating mechanism are achieved, despite the low water contact angle on the new material. Although the new phase transformable slippery lubricant infused porous structure, features much milder hydrophobicity than conventional oil/water separators, it can remove diverse types of oil from water with high efficiencies. The phase transformable slippery lubricant infused porous structure is able to maintain their water repellency after immersing in high concentration salt (10 wt% NaCl), acid (25 % HCl), alkaline (25 % NH3 center dot H2O) solutions for 120 h, showing remarkably functional durability in harsh environment. The lubricant phase transition mechanism proposed in this study is universally applicable to porous substrates with various chemical compositions and pore structures, such as porous sponges or even daily life breads, for creating efficient oil/water separators, which can serve as a novel accessible design principle of phase transformable slippery lubricant infused porous structure for eco-friendly oil/water separators.
机译：油/水分离材料背后的基本机理是其表面润湿性，使油或水都能通过。用于油/水分离的常规材料通常具有极高的润湿性，即用于水分离的超亲水性和用于油分离的超疏水性。很少有报道使用中等疏水性或什至相对亲水性的易于获得的材料来制备高效的油/水分离器。在这项工作中，在制造用于油/水分离的光滑的润滑剂注入的多孔结构中，实现了一种通过触发注入的润滑剂从多孔结构中的液相到固态的相变的新策略。尽管在新材料上的水接触角很小，但通过向聚酯纤维布中注入椰子油，在相变后，仍可通过吸收-渗透机制获得出色的拒水性和透油性。尽管新型相变可滑润滑剂注入了多孔结构，比常规油/水分离器具有疏水性要弱得多的特点，但它可以高效地从水中去除各种类型的油。将可相变的光滑润滑剂注入的多孔结构在高浓度盐（10 wt％NaCl），酸（25％HCl），碱性（25％NH3中心点H2O）溶液中浸泡120小时后能够保持其拒水性，显示在恶劣环境下具有出色的功能耐久性。这项研究中提出的润滑剂相变机理普遍适用于具有各种化学组成和孔结构的多孔基材，例如多孔海绵，甚至是日常生活用面包，以创建有效的油/水分离器，可以作为一种新颖的易用设计原理用于生态友好型油/水分离器的相变可滑润滑剂注入的多孔结构。

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  • 来源
    《Journal of Hazardous Materials》 |2020年第may15期|122176.1-122176.9|共9页
  • 作者

  • 作者单位

    Norwegian Univ Sci & Technol NTNU Dept Struct Engn NTNU Nanomech Lab N-7491 Trondheim Norway;

    Norwegian Univ Sci & Technol NTNU Dept Chem N-7491 Trondheim Norway;

    Norwegian Univ Sci & Technol NTNU Dept Energy & Proc Engn N-7491 Trondheim Norway;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Oil/water separation; PTSLIPS; Phase transition; Absorbing-permeating; Eco-friendly;

    机译：油/水分离;PTSLIPS;相变;吸收渗透环保的;

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