Efficiently texturing hierarchical superhydrophobic fluoride-free translucent films by AACVD with excellent durability and self-cleaning ability
Efficiently texturing hierarchical superhydrophobic fluoride-free translucent films by AACVD with excellent durability and self-cleaning ability
复制标题
通过AACVD高效织构分级超疏水无氟半透明薄膜，具有优异的耐用性和自清洁能力
DOI：
10.1039/c8ta05402a
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发表时间：
2018-09-28
影响因子：
11.9
通讯作者：
Parkin, Ivan P.
中科院分区：
文献类型：
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作者：
Li, Shuhui;Page, Kristopher;Parkin, Ivan P.
通过气溶胶辅助化学气相沉积，由前体聚二甲基硅氧烷（PDMS）和正硅酸乙酯（TEOS）的复合材料的一步沉积，制造透明和超疏水玻璃表面。由于TEOS前体分解纳米颗粒并沉积在PDMS前体水解形成的微米级颗粒周围，因此获得了树莓状的分级结构。采用优化的工艺条件（T：290-330 °C，沉积时间：15-30 min）制备了半透明超疏水薄膜，其水接触角>160°，滑动角<1°。发现当水滴滴落到这样的表面上时，存在9个弹跳周期。观察到对胶带剥离、暴露于UV光（365 nm，3.7 mW cm-2，72 h）和大pH范围（pH = 1-14，72 h）的上级稳健性。还检查了机械鲁棒性，结果表明，当用粗砂纸研磨5米时，膜失去其超疏水性。自清洁测试表明，超疏水表面可以去除各种污染物和水性染料，留下清晰的表面。这种新方法可以应用于各种基板，包括柔性（织物和铜网）和刚性材料（铜块）。这可以为生产具有多功能应用的大规模样品提供一种新的，快速和简便的途径。
Translucent and superhydrophobic glass surfaces were fabricated by one-step deposition of a composite from the precursors, polydimethylsiloxane (PDMS) and tetraethyl orthosilicate (TEOS), via aerosol-assisted chemical vapour deposition. A raspberry-like hierarchical structure was obtained due to the nanoparticles being decomposed by the TEOS precursor and deposited around the micro-scale particles formed by the hydrolysis of the PDMS precursor. In this work, a translucent and superhydrophobic film was prepared by using optimized parameters (T: 290–330 °C, deposition time: 15–30 min) and the resulting water contact angle and sliding angle were >160° and <1°, respectively. It was found that there were 9 bounce cycles when water droplets were dropped onto such surfaces. Superior robustness was observed against tape-peeling, and on exposure to UV light (365 nm, 3.7 mW cm−2, 72 h) and to a large pH range (pH = 1–14, 72 h). The mechanical robustness was also examined and the results demonstrated that the film loses its superhydrophobicity when abraded for 5 meters with coarse sandpaper. The self-cleaning test demonstrated that the superhydrophobic surface could shed various contaminants and aqueous dyes, leaving a clear surface behind. This novel method can be applied to various substrates, including flexible (fabric and copper mesh) and rigid materials (copper block). This can provide a new, rapid and facile route for producing large-scale samples with multifunctional applications.