Article
Chemistry, Multidisciplinary
Matti J. Hokkanen, Matilda Backholm, Maja Vuckovac, Quan Zhou, Robin H. A. Ras
Summary: Superhydrophobic coatings with unique properties such as self-cleaning and staying dry have recently emerged in industrial and consumer markets. The stochastic nature of coating components can affect the uniformity of water repellency, and traditional contact angle goniometry may not provide accurate quantification of wetting properties. The study demonstrates that highly sensitive force-based methods can offer advantages in quantifying microscale heterogeneity in superhydrophobic coatings.
ADVANCED MATERIALS
(2021)
Article
Biochemistry & Molecular Biology
Yitong Ma, Pei Tian, Malayphone Bounmyxay, Yiwen Zeng, Nong Wang
Summary: This paper prepared spherical calcium carbonate particles and deposited nanoscale spherical silica on their surface to form a composite material with a micro-nano complex structure and hydrophobicity. The modified CaCO3@SiO2 composite showed good superhydrophobicity with high contact angle. The influence of material roughness on its hydrophobicity was studied using the Cassie model theory.
Article
Chemistry, Physical
Ryan Stoddard, Karthik Nithyanandam, Ranga Pitchumani
Summary: This study systematically investigated the durability of non-wetting surfaces, identifying functionalizing agents and lubricants that showed high durability under different conditions. The results also revealed a close correlation between lubricant viscosity and durability in hydrodynamic conditions.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Daniel J. Braconnier, Terence Davidovits, Randall M. Erb
Summary: Superhydrophobic coatings are often fragile and easily lose their properties when subjected to droplet impact. This paper systematically studies ten different self-similar superhydrophobic coating approaches to understand why some coatings are more robust against hydrodynamic wear. The study finds that coatings with robust apolar chemistry, hierarchal topography, and slow loss of sacrificial material are more resilient against rapid droplet impacts. A quantitative approach to hydrodynamic wear of self-similar superhydrophobic coatings is proposed.
Article
Materials Science, Coatings & Films
Shafarina Azlinda Ahmad Kamal, Richard Ritikos, Saadah Abdul Rahman
Summary: The study found that increasing the annealing temperature can enhance the water repellence of carbon nitride nanostructures, significantly increasing the contact angle from 102.8° to 158.1° and greatly reducing the contact angle hysteresis. The film annealed at 700°C showed excellent durability performance, maintaining its super-hydrophobic behavior even after being subjected to more than 10 water droplets.
SURFACE & COATINGS TECHNOLOGY
(2021)
Review
Engineering, Multidisciplinary
Jihui Zhao, Xuan Gao, Siying Chen, Houquan Lin, Zhihao Li, Xiaojie Lin
Summary: This paper reviews the progress and applications of hydrophobic or superhydrophobic modification of cement-based materials, analyzes the mechanisms of hydrophobic modification, and discusses the methods and issues in the current research.
COMPOSITES PART B-ENGINEERING
(2022)
Review
Chemistry, Multidisciplinary
Youhua Jiang, Chang-Hwan Choi
Summary: This article critically reviews the fundamentals of superhydrophobic surfaces, focusing on the clarification of contact angles, the quantification of droplet retention force, and the role of contact line. It discusses how surface features affect droplet retention, introduces advanced analytical models for predicting contact angles and retentive forces, and further explores the importance of droplet retention in various applications.
ADVANCED MATERIALS INTERFACES
(2021)
Article
Chemistry, Physical
Bao Liu, Jiaxin Tang, Juan Li, Yanguang Shan, Youhua Jiang
Summary: The study examines how the flexibility of surface structures affects the equilibrium contact angle of water droplets. The results show a significant deviation between the measured contact angles and the predictions by the classic Cassie-Baxter equation, especially for softer pillars. By incorporating the elastic energy of the deflected pillars, a modified Cassie-Baxter equation is proposed for droplets on soft pillar arrays.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Polymer Science
Zhiqian Wang, Sumona Paul, Louis H. Stein, Arash Salemi, Somenath Mitra
Summary: Superhydrophobic surfaces have promising applications in the medical field, especially in blood-contacting devices. These surfaces can control cell-surface interactions, facilitate blood or plasma flow, and resist biofouling. Researchers have developed methods to fabricate blood-compatible or biocompatible superhydrophobic surfaces using different materials, making them ideal for clinical applications.
Article
Engineering, Chemical
Qingjun Du, Peng Zhou, Yuping Pan, Xiao Qu, Lu Liu, Hui Yu, Jian Hou
Summary: Hydrophobicity and roughness of solid surfaces play crucial roles in determining wetting and flow behavior. Increasing roughness can enhance apparent hydrophilicity in some cases, while it may improve apparent hydrophobicity in others. Beyond the superhydrophobic boundary, the effect of roughness on apparent hydrophobicity weakens or disappears.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Polymer Science
Xun Hui Wu, Yoon Yee Then
Summary: This study presents a facile and cost-effective method for fabricating superhydrophobic surfaces using graphene and titanium dioxide nanoparticles. The graphene/TiO2-coated surfaces on a biodegradable thermoplastic poly(lactic acid) substrate achieved excellent water-repellent properties, making them suitable for reducing hazardous complications in medical devices. The durability and effectiveness of the superhydrophobic coating further suggest its potential in biomaterial manufacturing.
Article
Chemistry, Physical
Kaijian Huang, Ruiyu Sun, Jiaqing Wang, Xijun Shi, Hechang Lei
Summary: Superhydrophobic coating ice suppression technology has great potential for application on pavements. This study investigated a novel superhydrophobic coating specifically designed for pavement surfaces to address questions about its active anti-icing capabilities in a condensing environment. The findings showed that the proposed coating effectively prevents condensate droplets from infiltrating the surface structure, delaying surface icing and reducing ice attachment strength.
Article
Chemistry, Applied
K. Indira, M. Ezhil Vizhi, Brindhadevi Kathirvel, Arivalagan Pugazhendhi
Summary: The study found that the superhydrophobic coating on the 304L stainless steel substrate exhibited higher stability compared to the modified 9Cr-1Mo steel substrate, possibly due to the significant amounts of highly resistant Cr and Ni in 304LSS and the presence of silanized silica nanoparticles in the coating. The water contact angle values were similar between the two substrates, indicating similar superhydrophobic behavior of the samples.
PROGRESS IN ORGANIC COATINGS
(2021)
Article
Materials Science, Multidisciplinary
Nehar Ullah, Mahnoor Zafar, Hizbullah Malik, Kamran Zaman, Muhammad Raheej, Irshad Ali, Muhammad Younas, Mohammad Jafar Molaei, Mashallah Rezakazemi
Summary: The current study focuses on fabricating and characterizing super-hydrophobic thin-film coatings using synthetized and functionalized Si-NPs, with PVA-associated coatings showing the best results in terms of superhydrophobicity and durability. Characterization techniques such as SEM, AFM, and XRD were utilized to analyze the topographical and morphological characteristics of the coatings, demonstrating the homogeneous application of Si-NPs thin films.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Construction & Building Technology
Yipu Guo, Wengui Li, Wenkui Dong, Kejin Wang, Xuzhen He, Kirk Vessalas, Daichao Sheng
Summary: In this paper, a novel cement-based sensor with integrated self-sensing superhydrophobicity and self-cleaning functions was developed. The silane-treated cement-based sensor showed satisfactory stress/strain sensing performance and excellent hydrophobic behavior. The sensor also exhibited good self-cleaning performance, effectively removing stains.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Editorial Material
Chemistry, Physical
Jaroslaw Drelich, Ludmila Boinovich, Ziqi Sun
SURFACE INNOVATIONS
(2022)
Article
Chemistry, Physical
O. A. Serenko, I. B. Meshkov, E. S. Afanas'ev, E. A. Kuzina, A. M. Emelyanenko, L. B. Boinovich, A. M. Muzafarov
Summary: This study focuses on studying the properties of polydimethylsiloxane rubber crosslinked with MQ copolymer and modified with organosilicon compounds of different architectures. The results show that the modified coatings exhibit hydrophobic and anti-icing properties, with water droplets on the surfaces able to remain in a metastable supercooled state for a longer time at low temperatures. The addition of modifiers decreases the rate of droplet crystallization on the coatings.
Article
Chemistry, Physical
E. A. Kuzina, K. A. Emelyanenko, A. G. Domantovskii, A. M. Emelyanenko, L. B. Boinovich
Summary: Several superhydrophobic coatings have been developed using laser treatment and chemical adsorption, with different surface morphologies achieved through varying laser treatment regimes. The chemical and mechanical stability of these coatings have been examined, and a method has been proposed to enhance their superhydrophobic properties and improve material stability.
Article
Energy & Fuels
Evgeny A. Chinnov, Sergey Ya Khmel, Victor Yu Vladimirov, Aleksey Safonov, Vitaliy V. Semionov, Kirill A. Emelyanenko, Alexandre M. Emelyanenko, Ludmila B. Boinovich
Summary: Flat surfaces with different patterns of hydrophobic spots were used to study boiling heat transfer. The results showed that heat transfer on biphilic surfaces was significantly higher than on non-biphilic surfaces. Surface texture, shape of hydrophobic regions, and creation method did not have a significant effect on heat transfer. The heat transfer rate depended on the size, distance, and number of hydrophobic spots, with the surface having the largest number of spots showing the highest efficiency. Biphilic surfaces with laser-ablated cavities were the most stable during prolonged contact with boiling water.
Article
Chemistry, Physical
Alexander G. Domantovsky, Kirill A. Emelyanenko, Alexandre M. Emelyanenko, Ludmila B. Boinovich
Summary: This study investigates the degradation mechanisms of superhydrophobic coatings under high ozone concentrations and reveals that the degradation rate is higher under dynamic conditions compared to nearly static conditions. Factors such as degradation of the hydrophobic agent layer, mechanical deterioration of texture, ozone adsorption, and contact with water play a significant role in the behavior of superhydrophobic coatings.
Article
Energy & Fuels
Kirill A. Emelyanenko, Alexander G. Domantovsky, Pavel S. Platonov, Pavel S. Kochenkov, Alexandre M. Emelyanenko, Ludmila B. Boinovich
Summary: The application of polyfunctional water-repelling coatings for high voltage outdoor power lines has attracted significant interest due to their ability to enhance performance. However, the harsh conditions associated with high voltage pose challenges to the durability of these coatings.
Article
Chemistry, Physical
Alexandre M. Emelyanenko, Kirill A. Emelyanenko, Alexander Ya. Vul, Alexander V. Shvidchenko, Ludmila B. Boinovich
Summary: According to the classical nucleation theory, solid particles in a liquid promote heterogeneous nucleation under supercooling. This study analyzes the behavior of detonation diamond nanoparticles (DND) with different surface charges in supercooled conditions and frozen state. The experimental data and analysis demonstrate a significant increase in freezing delay times for positively charged nanoparticles and a sharp decrease for negatively charged ones compared to deionized water.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Ekaterina A. Kuzina, Kirill A. Emelyanenko, Maria A. Teplonogova, Alexandre M. Emelyanenko, Ludmila B. Boinovich
Summary: Tungsten is a material with high thermal conductivity, high melting point, high hardness, and high density, making it suitable for various applications. However, the formation of surface oxides on tungsten significantly reduces its mechanical properties and makes it prone to interaction with water. Researchers have developed a series of superhydrophobic coatings for tungsten surfaces using nanosecond laser treatment and chemical vapor deposition. The durability of the coatings depends on surface morphology and composition, which can be controlled by adjusting the parameters of the laser treatment. The optimized coating exhibited high superhydrophobic properties even after subjected to abrasion, contact with water droplets, and falling sand tests.
Review
Materials Science, Multidisciplinary
Kirill A. Emelyanenko, Alexandre M. Emelyanenko, Ludmila B. Boinovich
Summary: Stainless steel is a vital material in engineering and daily life due to its mechanical efficiency, strength, and resistance to oxidation and corrosion. However, it still faces certain types of corrosion. This paper introduces a new approach of using laser processing and a low surface energy substance to protect stainless steel from corrosion.
Article
Chemistry, Physical
E. A. Kuzina, F. Sh. Omran, A. M. Emelyanenko, L. B. Boinovich
Summary: A method of obtaining superhydrophobic coatings on tungsten and D16 aluminum alloy surfaces using nanosecond laser treatment and chemical deposition has been developed. The study showed that for chemically stable coatings, the hydrophobizer should be individually applied to each material with specific sample preparation conditions. By varying the surface pretreatment time with oxygen plasma, the density of surface adsorption sites can be controlled, thus controlling the chemical stability of the hydrophobizer layer and the overall coating. Superhydrophobic coatings with contact angles larger than 170 degrees were successfully obtained on the metals, and the contact angles remained preserved during long-term continuous contact with aqueous media.
