Tuneable Wetting of Fluorine‐Free Superhydrophobic Films via Titania Modification to Enhance Durability and Photocatalytic Activity

IF 4.3 3区材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Advanced Materials Interfaces Pub Date : 2024-08-13 DOI:10.1002/admi.202400519

Julie Jalila Kalmoni, Christopher S. Blackman, Claire J. Carmalt

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Abstract

Superhydrophobic photocatalytic self‐cleaning films are fabricated via aerosol‐assisted chemical vapor deposition (AACVD). First, superhydrophobic/SiO2 polymer films consisting of a combination of fatty acids, polydimethylsiloxane (PDMS) and SiO2 nanoparticles are deposited which displayed static water contact angles >160° and maintained superhydrophobicity after 300 tape peel cycles. The AACVD process is used to achieve a highly textured morphology required for superhydrophobicity. The surface properties are then modified by depositing a thin layer of TiO2 on the superhydrophobic coating via AACVD of titanium isopropoxide (TTIP). The deposited films are hydrophobic/superhydrophobic depending on the concentration of TTIP used in the deposition process. The resulting hybrid films exhibit enhanced photocatalytic activity relative to the uncoated superhydrophobic film, maintained hydrophobicity after exposure to toluene, and tolerated pencil hardness of up to “6H”. This multi‐layered approach allows to easily tune the wettability of the superhydrophobic film, which is challenging to do when the superhydrophobic and TiO2 precursor are deposited as a single one‐pot precursor.

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通过钛改性实现无氟超疏水薄膜的可调润湿性，从而提高耐久性和光催化活性

通过气溶胶辅助化学气相沉积（AACVD）制造出了超疏水光催化自清洁薄膜。首先，沉积出由脂肪酸、聚二甲基硅氧烷（PDMS）和二氧化硅纳米粒子组合而成的超疏水/二氧化硅聚合物薄膜，该薄膜显示出静态水接触角 160°，并在 300 次胶带剥离循环后保持超疏水特性。AACVD 工艺用于实现超疏水所需的高纹理形态。然后，通过异丙醇氧化钛 (TTIP) 的 AACVD 在超疏水涂层上沉积一薄层 TiO2，从而改变其表面特性。沉积薄膜的疏水性/超疏水性取决于沉积过程中使用的 TTIP 浓度。与未涂层的超疏水薄膜相比，混合薄膜具有更强的光催化活性，在接触甲苯后仍能保持疏水性，并能承受高达 "6H "的铅笔硬度。这种多层方法可以轻松调节超疏水薄膜的润湿性，而将超疏水和二氧化钛前驱体作为单一的单层前驱体沉积时，要做到这一点就很困难了。

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来源期刊

Advanced Materials Interfaces CHEMISTRY, MULTIDISCIPLINARY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

8.40

自引率

5.60%

发文量

1174

审稿时长

1.3 months

期刊介绍： Advanced Materials Interfaces publishes top-level research on interface technologies and effects. Considering any interface formed between solids, liquids, and gases, the journal ensures an interdisciplinary blend of physics, chemistry, materials science, and life sciences. Advanced Materials Interfaces was launched in 2014 and received an Impact Factor of 4.834 in 2018. The scope of Advanced Materials Interfaces is dedicated to interfaces and surfaces that play an essential role in virtually all materials and devices. Physics, chemistry, materials science and life sciences blend to encourage new, cross-pollinating ideas, which will drive forward our understanding of the processes at the interface. Advanced Materials Interfaces covers all topics in interface-related research: Oil / water separation, Applications of nanostructured materials, 2D materials and heterostructures, Surfaces and interfaces in organic electronic devices, Catalysis and membranes, Self-assembly and nanopatterned surfaces, Composite and coating materials, Biointerfaces for technical and medical applications. Advanced Materials Interfaces provides a forum for topics on surface and interface science with a wide choice of formats: Reviews, Full Papers, and Communications, as well as Progress Reports and Research News.