Simple Approach to Fabricate an Anisotropic Wetting Surface with High Adhesive Force toward Droplet Transfer,ACS Applied Polymer Materials

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Simple Approach to Fabricate an Anisotropic Wetting Surface with High Adhesive Force toward Droplet Transfer
ACS Applied Polymer Materials ( IF 4.4 ) Pub Date : 2021-08-06 , DOI: 10.1021/acsapm.1c00479
Honghui Shi ₁ , Zhongzhu Liu ₂ , Baobao Chang ₁ , Chaojun Gao ₁ , Liwei Mi ₂ , Guoqiang Zheng ₁ , Chuntai Liu ₁ , Changyu Shen ₁

Affiliation

An anisotropic wetting surface, a kind of functional surface with distinct direction-dependent wettability, shows significant applications in many aspects. In this work, an economical but facile method to fabricate a surface with anisotropic wettability and high adhesive force for droplet transfer is proposed, that is, thermoplastic high-density polyethylene (HDPE)/water-soluble polyethylene oxide (PEO) blend was first prepared via melt extrusion molding, resulting in a co-continuous but oriented HDPE microfibrillar network. Subsequently, a “slicing-leaching-freeze drying” method was employed to prepare the anisotropic wetting surface. The whole preparation process shows the merits of being low cost, highly efficient, and environmentally friendly. Furthermore, such an anisotropic wetting surface shows high adhesive force, which can be employed as a “mechanical arm” (i.e., a medium for microdroplet transportation) toward droplet transfer. Moreover, its potential applications in chemical microreactors and biological monitoring were further explored. This work will provide a facile but low-cost way to prepare an anisotropic wetting surface with high adhesive force.

中文翻译：

制造具有高粘附力的各向异性润湿表面以实现液滴转移的简单方法

各向异性润湿表面是一种具有明显的方向相关润湿性的功能表面，在许多方面显示出重要的应用。在这项工作中，提出了一种经济但简便的方法来制造具有各向异性润湿性和高粘附力的液滴转移表面，即首先制备热塑性高密度聚乙烯（HDPE）/水溶性聚环氧乙烷（PEO）共混物通过熔融挤出成型，形成共同连续但定向的 HDPE 微纤维网络。随后，采用“切片-浸出-冷冻干燥”方法制备各向异性润湿表面。整个制备过程具有低成本、高效、环保的优点。此外，这种各向异性润湿表面显示出高粘附力，它可以用作“机械臂”（即微滴传输的介质），用于液滴转移。此外，进一步探索了其在化学微反应器和生物监测中的潜在应用。这项工作将提供一种简便但低成本的方法来制备具有高粘附力的各向异性润湿表面。

更新日期：2021-09-10

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