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Wide-temperature antifouling characteristic of a double re-entrant pillar array surface

机译:双重进入柱阵列表面的宽温度防污特性

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摘要

Fouling causes numerous adverse effects on various types of systems. In addition, clean fouling on a solid surface is cost-intensive and time-consuming. Superhydrophobic (SHB) surfaces with a water-repellent property can potentially be used for antifouling. However, SHB surfaces lose their antifouling property at high temperatures because of the failure of the hydrophobic coating on them. Nevertheless, there are numerous applications being operated at high temperatures. Thus, a surface exhibiting antifouling characteristic over a wide temperature range is required. In this study, we demonstrate that a double re-entrant pillar (DRP) array surface possesses a wide-temperature antifouling characteristic. Although the silicon dioxide top surface of the pillar is hydrophilic, the upward surface tension force from the DRPs prevents the impacting droplets from penetrating the pillar array. Thus, the impacting droplets bounce back from the surface without leaving residues on it at temperatures from 25 to 560°C. By contrast, the impurities of the impacting droplets are retained on an SHB surface composed of a silicon nanowire array at various temperatures. The wide-temperature antifouling property of the DRP surface can be used for preventing fouling in many industrial systems.
机译:污染导致对各种类型的系统产生众多不利影响。此外,固体表面上的清洁污垢是成本密集和耗时的。具有防水性的超疏水(SHB)表面可能用于防污。然而,由于疏水涂层对它们的失效,SHB表面在高温下失去了防污性。尽管如此,在高温下运行了许多应用。因此,需要在宽温度范围内表现出防污特性的表面。在这项研究中,我们证明双重再参赛柱(DRP)阵列表面具有宽温度的防污特性。尽管支柱的二氧化硅顶表面是亲水的,但是来自DRP的向上表面张力防止撞击液滴穿透柱阵列。因此,撞击液滴从表面反射,而不在25至560℃的温度下将残留物留在其上。相反,撞击液滴的杂质保留在各种温度下由硅纳米线阵列组成的SHB表面上。 DRP表面的宽温度防污性能可用于防止许多工业系统中的污垢。

著录项

  • 来源
    《International Journal of Heat and Mass Transfer》 |2021年第8期|121178.1-121178.14|共14页
  • 作者单位

    Dept. of Mechanical Engineering National Taiwan University Taipei 10617 Taiwan;

    Institute of Pharmacology National Yang-Ming University Taipei 11221 Taiwan Institute of Pharmacology National Yang Ming Chiao Tung University Hsinchu 30010 Taiwan;

    Dept. of Mechanical Engineering National Chiao Tung University Hsinchu 30010 Taiwan Dept. of Mechanical Engineering National Yang Ming Chiao Tung University Hsinchu 30010 Taiwan;

    Dept. of Mechanical Engineering National Chiao Tung University Hsinchu 30010 Taiwan Dept. of Mechanical Engineering National Yang Ming Chiao Tung University Hsinchu 30010 Taiwan;

    Dept. of Mechanical Engineering National Taiwan University Taipei 10617 Taiwan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Antifouling; High temperature; Droplet; Double re-entrant pillar array; Superhydrophobic; Silicon nanowire array;

    机译:防污;高温;水滴;双重重新参加柱阵列;超富氢化;硅纳米线阵列;

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