Three-level hierarchical superhydrophobic Cu–Zn coating on a steel substrate without chemical modification for self-cleaning property

2017 ◽  
Vol 41 (13) ◽  
pp. 5436-5444 ◽  
Author(s):  
Hao Li ◽  
Sirong Yu
Keyword(s):  
Surface Energy ◽  
Chemical Modification ◽  
Steel Surface ◽  
Steel Substrate ◽  
Chemically Modified ◽  
Low Surface Energy ◽  
Energy Material ◽  
One Step ◽  
Self Cleaning

A superhydrophobic Cu–Zn coating was fabricated on a steel surface by facile one-step electrodeposition, without being chemically modified by a low surface energy material.

scholarly journals A Review of Fabrication Methods, Properties and Applications of Superhydrophobic Metals

Processes ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 666
Author(s):  
Kosmas Ellinas ◽  
Panagiotis Dimitrakellis ◽  
Panagiotis Sarkiris ◽  
Evangelos Gogolides
Keyword(s):  
Surface Energy ◽  
Real Life ◽  
Nanometer Scale ◽  
Metallic Surfaces ◽  
Wetting Properties ◽  
Low Surface Energy ◽  
Sacred Lotus ◽  
Energy Material ◽  
Surface Topographies ◽  
Self Cleaning

Hydrophobicity and superhydrophobicity with self-cleaning properties are well-known characteristics of several natural surfaces, such as the leaves of the sacred lotus plant (Nelumbo nucifera). To achieve a superhydrophobic state, micro- and nanometer scale topography should be realized on a low surface energy material, or a low surface energy coating should be deposited on top of the micro-nano topography if the material is inherently hydrophilic. Tailoring the surface chemistry and topography to control the wetting properties between extreme wetting states enables a palette of functionalities, such as self-cleaning, antifogging, anti-biofouling etc. A variety of surface topographies have been realized in polymers, ceramics, and metals. Metallic surfaces are particularly important in several engineering applications (e.g., naval, aircrafts, buildings, automobile) and their transformation to superhydrophobic can provide additional functionalities, such as corrosion protection, drag reduction, and anti-icing properties. This review paper focuses on the recent advances on superhydrophobic metals and alloys which can be applicable in real life applications and aims to provide an overview of the most promising methods to achieve sustainable superhydrophobicity.

Facile preparation of multi-scale nanoarchitectures on cotton fabric with low surface energy for high performance self-cleaning

2020 ◽  
Vol 111 (11) ◽  
pp. 1603-1613
Author(s):  
Shengnan Tian ◽  
Jian Zhao ◽  
Jiahuan He ◽  
Haiting Shi ◽  
Bingqi Jin ◽  
...  
Keyword(s):  
Surface Energy ◽  
Cotton Fabric ◽  
High Performance ◽  
Multi Scale ◽  
Low Surface Energy ◽  
Facile Preparation ◽  
Self Cleaning

scholarly journals One-step fabrication of recyclable and robust fluorine/polymer-free superhydrophobic fabrics

RSC Advances ◽  
2017 ◽  
Vol 7 (39) ◽  
pp. 24374-24381 ◽  
Author(s):  
Sheng Wang ◽  
Sanding Wu ◽  
Jiazhang Zhang ◽  
Tao Wang
Keyword(s):  
Surface Energy ◽  
Heating Process ◽  
Pet Fabric ◽  
Low Surface Energy ◽  
Alkyl Groups ◽  
One Step ◽  
Vacuum Heating

Without using any low-surface-energy fluoro-containing groups or long alkyl groups, via a simple vacuum heating process, we prepared a robust superhydrophobic TiO2/PET fabric.

scholarly journals Towards a Long-Chain Perfluoroalkyl Replacement: Water and Oil Repellent Perfluoropolyether-Based Polyurethane Oligomers

Polymers ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1128
Author(s):  
Liying Wei ◽  
Tugba D. Caliskan ◽  
Philip J. Brown ◽  
Igor Luzinov
Keyword(s):  
Surface Energy ◽  
Film Surface ◽  
Energy Materials ◽  
Low Surface Energy ◽  
One Step ◽  
Pet Film ◽  
Oil Repellent ◽  
Macromolecular Architecture ◽  
End Group ◽  
Long Chain

Original perfluoropolyether (PFPE)-based oligomeric polyurethanes (FOPUs) with different macromolecular architecture were synthesized (in one step) as low-surface-energy materials. It is demonstrated that the oligomers, especially the ones terminated with CF3 moieties, can be employed as safer replacements to long-chain perfluoroalkyl substances/additives. The FOPU macromolecules, when added to an engineering thermoplastic (polyethylene terephthalate, PET) film, readily migrate to the film surface and bring significant water and oil repellency to the thermoplastic boundary. The best performing FOPU/PET films have reached the level of oil wettability and surface energy significantly lower than that of polytetrafluoroethylene, a fully perfluorinated polymer. Specifically, the highest level of the repellency is observed with an oligomeric additive, which was made using aromatic diisocyanate as a comonomer and has CF3 end-group. This semicrystalline oligomer has a glass transition temperature (Tg) well above room temperature, and we associate the superiority of the material in achieving low water and oil wettability with its ability to effectively retain CF3 and CF2 moieties in contact with the test wetting liquids.

scholarly journals Influence of Hydrophobic Coating on Freeze-Thaw Cycle Resistance of Cement Mortar

2019 ◽  
Vol 2019 ◽  
pp. 1-12
Author(s):  
Zijian Song ◽  
Zhongyuan Lu ◽  
Zhenyu Lai
Keyword(s):  
Surface Energy ◽  
Chemical Modification ◽  
Cement Mortar ◽  
Mass Loss Rate ◽  
Water Contact ◽  
Freeze Thaw ◽  
Hydrophobic Coating ◽  
Low Surface Energy ◽  
Thaw Cycle ◽  
Cement Based Materials

Due to the porous characteristics of cement-based materials, they are often corroded by salt solutions, which results in decreased durability, especially against damage under freeze-thaw cycles (FTCs). Improving surface properties is an effective way to improve the durability of these materials. In this study, a hydrophobic coating was applied to the surface of cement mortar by chemical modification of low surface energy materials. Fourier transform infrared spectroscopy (FT-IR) showed that low surface energy substances are linked to hydration products through chemical bonds. A water contact angle test indicates that the surface of cement mortar changed from hydrophilic (θ = 14°) to hydrophobic (θ = 140°) after chemical modification. The cumulative water uptake of hydrophobic samples decreased by 90%. Meanwhile, the wear resistance of the hydrophobic coatings was excellent. Compared with the baseline sample, mass loss rate, flexural strength, and compressive strength of hydrophobic coating samples increased several-fold in the FTC test. Microstructural changes of the mortar were characterized by scanning electron microscopy. The results show that a hydrophobic coating can significantly improve the freeze-thaw resistance of cement-based materials. The formation of a hydrophobic layer on the surface of cement-based materials can improve their durability. The research results not only have applications in civil engineering but will also have great impact in the restoration of historic structures.

Molding processed multi-layered and multi-functional nanocomposites with high structural ability, electrical conductivity and durable superhydrophobicity

Nanoscale ◽  
2018 ◽  
Vol 10 (42) ◽  
pp. 19916-19926 ◽  
Author(s):  
Binrui Wu ◽  
Chaoyi Peng ◽  
Ying Hu ◽  
Suli Xing ◽  
Dazhi Jiang ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Surface Energy ◽  
Superhydrophobic Surfaces ◽  
Energy Materials ◽  
Low Surface Energy ◽  
Exciting Potential ◽  
Self Cleaning ◽  
Water Proofing

Bioinspired superhydrophobic surfaces mainly attributed to the nano/micro textures and low surface energy materials, have exciting potential usage in fields such as self-cleaning, water-proofing and so forth.

scholarly journals Effect of Intermolecular Hydrogen Bonding on Low-Surface-Energy Material of Poly(vinylphenol)

2007 ◽  
Vol 111 (13) ◽  
pp. 3404-3410 ◽  
Author(s):  
Han-Ching Lin ◽  
Chih-Feng Wang ◽  
Shiao-Wei Kuo ◽  
Pao-Hsiang Tung ◽  
Chih-Feng Huang ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Surface Energy ◽  
Intermolecular Hydrogen Bonding ◽  
Low Surface Energy ◽  
Energy Material

A facile two-step approach to prepare superhydrophobic surfaces on copper substrates

2014 ◽  
Vol 2 (14) ◽  
pp. 5010-5017 ◽  
Author(s):  
Huijie Wang ◽  
Jing Yu ◽  
Yizhi Wu ◽  
Weijia Shao ◽  
Xiaoliang Xu
Keyword(s):  
Surface Energy ◽  
Chemical Modification ◽  
Surface Oxidation ◽  
Superhydrophobic Surfaces ◽  
Energy Materials ◽  
Low Surface Energy ◽  
Cu Substrates ◽  
Subsequent Chemical

Superhydrophobic surfaces were prepared on Cu substrates via a facile surface oxidation approach and subsequent chemical modification with low surface energy materials.

The Preparation and the Research on Self-Cleaning Coating

2012 ◽  
Vol 472-475 ◽  
pp. 2686-2690
Author(s):  
Ying Ma ◽  
Feng Jun Lang ◽  
Xian Qiu Huang ◽  
Jian Rong Liu ◽  
Jing Wen Peng
Keyword(s):  
Surface Energy ◽  
Chemical Bond ◽  
Glass Surface ◽  
Graft Copolymerization ◽  
Oil Droplets ◽  
Coating Surface ◽  
Low Surface Energy ◽  
Self Cleaning ◽  
Nanoscale Roughness

Use the method of graft copolymerization to prepare a perfluorinated coating with low surface energy. It is combined with glass surface by chemical bond. The coating surface has the Nanoscale roughness of hydrophilic and oleophobic characteristics. Oil droplets are placed on the perfluorinated coating surface followed by water, and removed from the surface with water. So, the perfluorinated coating surface has the properties of self-cleaning

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