Preparation of Colorful, Infrared-Reflective, and Superhydrophobic Polymer Films with Obvious Resistance to Dust Deposition,ACS Applied Materials & Interfaces

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Preparation of Colorful, Infrared-Reflective, and Superhydrophobic Polymer Films with Obvious Resistance to Dust Deposition
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2018-11-02 00:00:00 , DOI: 10.1021/acsami.8b12567
Jing Zhang ₁ , Chenxi Zhu ₁ , Jian Lv ₁ , Weicheng Zhang ₁ , Jie Feng ₁

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In recent years, polymer films containing deep color and near-infrared (NIR)-reflective pigments have received much attention for their potential applications in energy-saving fields. However, in practical environments, dust present in the air is easily adsorbed and adheres to the surface of these films, thus gradually reducing their NIR reflectance. In this work, black or deep-red infrared-reflective pigments were firstly mixed with melted low-density polyethylene (LDPE) and then the resulting composite was thermally pressed on to a metal template possessing micro- and nanostructure surface roughness. After being cooled to a suitable temperature, the LDPE composite film was peeled from the template. Ultraviolet–visible–near-infrared spectroscopy and an indoor infrared lamp irradiation test both confirmed that the prepared films exhibit high NIR reflectance and high heat reflectance. Moreover, due to the stretching-controlled micromolding process, the films all exhibited a superhydrophobic (SH) property. After incubation in outdoor conditions for 1 month, the NIR reflectance of the SH films remained almost consistent; however, the films that did not possess SH property showed a marked decrease in their ability to reflect NIR radiation. By a combination of scanning electron microscopy imaging, we conclude that our films are able to resist dust deposition and thus avoid deterioration of their infrared-reflective properties. We believe that these colorful, infrared-reflective, SH, and cost-effective films have potential application for reducing energy consumption where minimal solar irradiation is required.

中文翻译：

具有明显的抗粉尘沉积性能的彩色，红外反射和超疏水聚合物薄膜的制备

近年来，含有深色和近红外（NIR）反射颜料的聚合物薄膜因其在节能领域的潜在应用而备受关注。但是，在实际环境中，空气中存在的灰尘很容易吸附并粘附在这些薄膜的表面，从而逐渐降低其NIR反射率。在这项工作中，首先将黑色或深红色的红外反射颜料与熔融的低密度聚乙烯（LDPE）混合，然后将所得复合材料热压到具有微米和纳米结构表面粗糙度的金属模板上。冷却至合适的温度后，将LDPE复合膜从模板上剥离。紫外线-可见-近红外光谱和室内红外灯辐照测试均证实所制得的膜具有高NIR反射率和高热反射率。而且，由于拉伸控制的微成型工艺，所有膜均表现出超疏水性（SH）。在室外条件下孵育1个月后，SH膜的NIR反射率几乎保持一致；但是，不具有SH特性的薄膜反射NIR辐射的能力显着下降。通过结合扫描电子显微镜成像，我们得出结论，我们的膜能够抵抗灰尘沉积，从而避免了其红外反射性能的下降。我们相信这些彩色的，红外线反射的SH

更新日期：2018-11-02

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