1
|
Wang G, Ma F, Zhu L, Zhu P, Tang L, Hu H, Liu L, Li S, Zeng Z, Wang L, Xue Q. Bioinspired Slippery Surfaces for Liquid Manipulation from Tiny Droplet to Bulk Fluid. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024:e2311489. [PMID: 38696759 DOI: 10.1002/adma.202311489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 04/04/2024] [Indexed: 05/04/2024]
Abstract
Slippery surfaces, which originate in nature with special wettability, have attracted considerable attention in both fundamental research and practical applications in a variety of fields due to their unique characteristics of superlow liquid friction and adhesion. Although research on bioinspired slippery surfaces is still in its infancy, it is a rapidly growing and enormously promising field. Herein, a systematic review of recent progress in bioinspired slippery surfaces, beginning with a brief introduction of several typical creatures with slippery property in nature, is presented. Subsequently,this review gives a detailed discussion on the basic concepts of the wetting, friction, and drag from micro- and macro-aspects and focuses on the underlying slippery mechanism. Next, the state-of-the-art developments in three categories of slippery surfaces of air-trapped, liquid-infused, and liquid-like slippery surfaces, including materials, design principles, and preparation methods, are summarized and the emerging applications are highlighted. Finally, the current challenges and future prospects of various slippery surfaces are addressed.
Collapse
Affiliation(s)
- Gang Wang
- Key Laboratory of Advanced Marine Materials, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, P. R. China
| | - Fuliang Ma
- Key Laboratory of Advanced Marine Materials, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, P. R. China
| | - Lijing Zhu
- Key Laboratory of Advanced Marine Materials, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, P. R. China
| | - Ping Zhu
- Key Laboratory of Advanced Marine Materials, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, P. R. China
| | - Lei Tang
- Key Laboratory of Advanced Marine Materials, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, P. R. China
| | - Hongyi Hu
- Key Laboratory of Advanced Marine Materials, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, P. R. China
| | - Luqi Liu
- Key Laboratory of Advanced Marine Materials, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, P. R. China
| | - Shuangyang Li
- Key Laboratory of Advanced Marine Materials, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, P. R. China
| | - Zhixiang Zeng
- Key Laboratory of Advanced Marine Materials, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, P. R. China
| | - Liping Wang
- Key Laboratory of Advanced Marine Materials, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, P. R. China
| | - Qunji Xue
- Key Laboratory of Advanced Marine Materials, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, P. R. China
| |
Collapse
|
2
|
Vishnu J, Kesavan P, Shankar B, Dembińska K, Swiontek Brzezinska M, Kaczmarek-Szczepańska B. Engineering Antioxidant Surfaces for Titanium-Based Metallic Biomaterials. J Funct Biomater 2023; 14:344. [PMID: 37504839 PMCID: PMC10381466 DOI: 10.3390/jfb14070344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 06/21/2023] [Accepted: 06/27/2023] [Indexed: 07/29/2023] Open
Abstract
Prolonged inflammation induced by orthopedic metallic implants can critically affect the success rates, which can even lead to aseptic loosening and consequent implant failure. In the case of adverse clinical conditions involving osteoporosis, orthopedic trauma and implant corrosion-wear in peri-implant region, the reactive oxygen species (ROS) activity is enhanced which leads to increased oxidative stress. Metallic implant materials (such as titanium and its alloys) can induce increased amount of ROS, thereby critically influencing the healing process. This will consequently affect the bone remodeling process and increase healing time. The current review explores the ROS generation aspects associated with Ti-based metallic biomaterials and the various surface modification strategies developed specifically to improve antioxidant aspects of Ti surfaces. The initial part of this review explores the ROS generation associated with Ti implant materials and the associated ROS metabolism resulting in the formation of superoxide anion, hydroxyl radical and hydrogen peroxide radicals. This is followed by a comprehensive overview of various organic and inorganic coatings/materials for effective antioxidant surfaces and outlook in this research direction. Overall, this review highlights the critical need to consider the aspects of ROS generation as well as oxidative stress while designing an implant material and its effective surface engineering.
Collapse
Affiliation(s)
- Jithin Vishnu
- Department of Mechanical Engineering, Amrita Vishwa Vidyapeetham, Amritapuri Campus, Clappana 690525, India
| | - Praveenkumar Kesavan
- Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India
| | - Balakrishnan Shankar
- Department of Mechanical Engineering, Amrita Vishwa Vidyapeetham, Amritapuri Campus, Clappana 690525, India
| | - Katarzyna Dembińska
- Department of Environmental Microbiology and Biotechnology, Faculty of Biological and Veterinary Sciences, Nicolaus Copernicus University in Toruń, 87-100 Toruń, Poland
| | - Maria Swiontek Brzezinska
- Department of Environmental Microbiology and Biotechnology, Faculty of Biological and Veterinary Sciences, Nicolaus Copernicus University in Toruń, 87-100 Toruń, Poland
| | - Beata Kaczmarek-Szczepańska
- Department of Biomaterials and Cosmetic Chemistry, Faculty of Chemistry, Nicolaus Copernicus University in Toruń, 87-100 Toruń, Poland
| |
Collapse
|
3
|
Park CB, Kim SH, Lee K, Lee JH. Controlling Superhydrophobicity and Oleophobicity of Polydimethylsiloxane-Coated Silica Hybrid Particles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:4829-4837. [PMID: 36947726 DOI: 10.1021/acs.langmuir.3c00272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Hierarchical functional organic-inorganic hybrid particles for versatile control of surface wettability have attracted much attention in a wide range of applications from makeup cosmetics to anti-smudging optoelectronic devices. In this study, superhydrophobic and oleophobic organic-inorganic hybrid particles were prepared by a simple and systematic fabrication strategy using the synergistic combination of commonly available silica particles and polydimethylsiloxanes (PDMSs) with hydrophobic chain ends. Various types of PDMSs with different chain lengths and chemical structures were surface-grafted to silica microparticles through facile physical dispersion and subsequent thermal treatment to form hydrogen bonds or covalent bonds between the inorganic silica and organic PDMS polymers and thus induce a core-shell structure for the hybrid particles, which imparts superhydrophobicity and oleophobicity to the surface of silica particles. The prepared PDMS-coated silica hybrid particles with long PDMS chains exhibited a water contact angle of 151.2° and an oil contact angle of 15.2° due to the rough surface morphology and hydrophobic long-chain effects. Furthermore, the resulting organic-inorganic hybrid particles were thermally stable up to 420 °C. This controlled approach endowed the organic-inorganic hybrid particles with both superhydrophobic and oleophobic surfaces and, therefore, these particles were proven to be suitable for waterproof applications.
Collapse
Affiliation(s)
- Chan Beom Park
- Department of Chemical Engineering, Soongsil University, Seoul 06978, Republic of Korea
| | - Sang Hee Kim
- Department of Chemical Engineering, Soongsil University, Seoul 06978, Republic of Korea
| | - Keumjung Lee
- Department of Chemical Engineering, Soongsil University, Seoul 06978, Republic of Korea
| | - Jun Hyup Lee
- Department of Chemical Engineering, Soongsil University, Seoul 06978, Republic of Korea
| |
Collapse
|
4
|
Yang L, Chen Y, Zhang T, Fu H. Superior anti‐smudge and flame retardancy of polydimethylsiloxane composite coating with phosphorus modified CO
0.5
Ni
0.5
Fe
2
O
4. J Appl Polym Sci 2023. [DOI: 10.1002/app.53832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2023]
Affiliation(s)
- Lei Yang
- School of Chemistry and Civil Engineering Shaoguan University Shaoguan China
| | - Yuese Chen
- School of Chemistry and Civil Engineering Shaoguan University Shaoguan China
| | - Ting Zhang
- School of Chemistry and Civil Engineering Shaoguan University Shaoguan China
| | - Heqing Fu
- School of Chemistry and Chemical Engineering, Guangdong Provincial Key Lab of Green Chemical Product Technology South China University of Technology Guangzhou China
| |
Collapse
|
5
|
Gao P, Wang Y, Wang J, Wang F, Ma W, Zhang Z, Men X, Lu Y. Rational Design of Durable Anti-fouling Coatings with High Transparency, Hardness, and Flexibility. ACS APPLIED MATERIALS & INTERFACES 2022; 14:29156-29166. [PMID: 35715000 DOI: 10.1021/acsami.2c04279] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Highly transparent, durable, flexible and smooth coatings with excellent anti-fouling properties have broad applications on cars, windows, and touch screens. However, the coexistence of these multi-functions is difficult to achieve in a single coating material. Here, a coating is developed with excellent performance of high transparency (98.8%), anti-fouling, high hardness (8H), and flexibility simultaneously (TAHF coating). In the material design, methyl etherified melamine formaldehyde resin, hexamethylene diisocyanate trimer, and mono-aminopropyl terminated polydimethylsiloxane (NH2-PDMS) were used as a polymer matrix to provide surface hardness, a cross-linker was used to provide toughness, and omniphobic groups from NH2-PDMS were used to provide anti-fouling performance. The TAHF coating has excellent liquid repellence even after six months of outdoor exposure, 260 h of UV light exposure, and 1500 wear and 2000 bending cycles, and its chemical shielding performance is superior to that of a commercial anti-corrosive coating. This strategy would provide a new route for the design of multifunctional anti-fouling coatings for practical applications.
Collapse
Affiliation(s)
- Peng Gao
- School of Materials and Energy, Lanzhou University, Lanzhou 730000, P. R. China
| | - Yanling Wang
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, P. R. China
| | - Jing Wang
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, P. R. China
| | - Fushan Wang
- School of Materials and Energy, Lanzhou University, Lanzhou 730000, P. R. China
| | - Wen Ma
- School of Materials and Energy, Lanzhou University, Lanzhou 730000, P. R. China
| | - Zhaozhu Zhang
- State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, P. R. China
| | - Xuehu Men
- School of Materials and Energy, Lanzhou University, Lanzhou 730000, P. R. China
| | - Yao Lu
- Department of Chemistry, Queen Mary University of London, London E1 4NS, U. K
| |
Collapse
|
6
|
Shrestha B, Ezazi M, Kwon G. Engineered Nanoparticles with Decoupled Photocatalysis and Wettability for Membrane-Based Desalination and Separation of Oil-Saline Water Mixtures. NANOMATERIALS 2021; 11:nano11061397. [PMID: 34070494 PMCID: PMC8227411 DOI: 10.3390/nano11061397] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/08/2021] [Revised: 05/21/2021] [Accepted: 05/22/2021] [Indexed: 12/14/2022]
Abstract
Membrane-based separation technologies are the cornerstone of remediating unconventional water sources, including brackish and industrial or municipal wastewater, as they are relatively energy-efficient and versatile. However, membrane fouling by dissolved and suspended substances in the feed stream remains a primary challenge that currently prevents these membranes from being used in real practices. Thus, we directly address this challenge by applying a superhydrophilic and oleophobic coating to a commercial membrane surface which can be utilized to separate and desalinate an oil and saline water mixture, in addition to photocatalytically degrading the organic substances. We fabricated the photocatalytic membrane by coating a commercial membrane with an ultraviolet (UV) light-curable adhesive. Then, we sprayed it with a mixture of photocatalytic nitrogen-doped titania (N-TiO2) and perfluoro silane-grafted silica (F-SiO2) nanoparticles. The membrane was placed under a UV light, which resulted in a chemically heterogeneous surface with intercalating high and low surface energy regions (i.e., N-TiO2 and F-SiO2, respectively) that were securely bound to the commercial membrane surface. We demonstrated that the coated membrane could be utilized for continuous separation and desalination of an oil–saline water mixture and for simultaneous photocatalytic degradation of the organic substances adsorbed on the membrane surface upon visible light irradiation.
Collapse
|
7
|
Surface morphologies and wetting properties of layer-by-layer assembled films of polyelectrolytes with bimodal molecular weight distribution. KOREAN J CHEM ENG 2020. [DOI: 10.1007/s11814-020-0545-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
8
|
Cai R, De Smet D, Vanneste M, Nysten B, Glinel K, Jonas AM. One-Step Aqueous Spraying Process for the Fabrication of Omniphobic Fabrics Free of Long Perfluoroalkyl Chains. ACS OMEGA 2019; 4:16660-16666. [PMID: 31616848 PMCID: PMC6788208 DOI: 10.1021/acsomega.9b02583] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Accepted: 09/17/2019] [Indexed: 06/10/2023]
Abstract
We report on a simple and versatile method for the preparation in one-step of omniphobic textiles, using only aqueous suspensions of silica particles and polyurethane devoid of long perfluoroalkyl chains (C8) that are now legally-banned because of severe environmental concerns. The omniphobic coatings can be applied on different substrates including fabrics, can resist acidic and basic conditions and a moderate number of washing cycles, and repel liquids such as n-octane, dodecane, hexadecane, ethylene glycol, glycerol, olive oil, and water. Analysis of the wetting properties of coated fabrics indicates that the liquid repellence results from the trapping of air in the re-entrant roughness created by aggregates of silica particles, together with the low surface tension of the polyurethane which bears legally accepted short perfluoroalkyl chains (C4). Our study is a significant step forward toward achieving more environmentally-friendly and robust omniphobic textiles.
Collapse
Affiliation(s)
- Ronggang Cai
- Bio
& Soft Matter, Institute of Condensed Matter and Nanosciences, Université catholique de Louvain, Croix du Sud 1/box L7.04.02, 1348 Louvain-la-Neuve, Belgium
| | - David De Smet
- Centexbel, Technologiepark 70, 9052 Zwijnaarde, Belgium
| | | | - Bernard Nysten
- Bio
& Soft Matter, Institute of Condensed Matter and Nanosciences, Université catholique de Louvain, Croix du Sud 1/box L7.04.02, 1348 Louvain-la-Neuve, Belgium
| | - Karine Glinel
- Bio
& Soft Matter, Institute of Condensed Matter and Nanosciences, Université catholique de Louvain, Croix du Sud 1/box L7.04.02, 1348 Louvain-la-Neuve, Belgium
| | - Alain M. Jonas
- Bio
& Soft Matter, Institute of Condensed Matter and Nanosciences, Université catholique de Louvain, Croix du Sud 1/box L7.04.02, 1348 Louvain-la-Neuve, Belgium
| |
Collapse
|
9
|
Design of robust superhydrophobic coatings using a novel fluorinated polysiloxane with UV/moisture dual cure system. REACT FUNCT POLYM 2019. [DOI: 10.1016/j.reactfunctpolym.2019.104329] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
10
|
Wang LS, Gopalakrishnan S, Rotello VM. Tailored Functional Surfaces Using Nanoparticle and Protein "Nanobrick" Coatings. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:10993-11006. [PMID: 30543751 DOI: 10.1021/acs.langmuir.8b03235] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Surface properties are an essential feature in a wide range of functional materials. In this article, we summarize strategies developed in our group that employ nanoparticles and proteins as nanobricks to create thin-film coatings on surfaces. These coatings contain tailorable surface functionality based on the properties of the predesigned nanobricks, parlaying both the chemical and structural features of the precursor particles and proteins. This strategy is versatile, providing the rapid generation of both uniform and patterned coatings that provide "plug-and-play" customizable surfaces for materials and biomedical applications.
Collapse
Affiliation(s)
- Li-Sheng Wang
- Department of Chemistry , University of Massachusetts , Amherst , Massachusetts 01003 , United States
| | - Sanjana Gopalakrishnan
- Department of Chemistry , University of Massachusetts , Amherst , Massachusetts 01003 , United States
| | - Vincent M Rotello
- Department of Chemistry , University of Massachusetts , Amherst , Massachusetts 01003 , United States
| |
Collapse
|
11
|
Ezazi M, Shrestha B, Klein N, Lee DH, Seo S, Kwon G. Self-Healable Superomniphobic Surfaces for Corrosion Protection. ACS APPLIED MATERIALS & INTERFACES 2019; 11:30240-30246. [PMID: 31339304 DOI: 10.1021/acsami.9b08855] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Corrosion-protective surfaces are of the utmost relevance to ensure long-term stability and reliability of metals and alloys by limiting their interactions with corrosive species, such as water and ions. However, their practical applications are often limited either by the inability to repel low surface tension liquids such as oils and alcohols or by poor mechanical durability. Here, a superomniphobic surface is reported that can display very high contact angles for both high and low surface tension liquids as well as for concentrated acids and bases. Such extreme repellency allowed for approximately 20% of the corrosion rate compared to the conventional superhydrophobic corrosion protective coatings. Furthermore, the superomniphobic surface can autonomously repair mechanical damage at an elevated temperature (60 °C) within a short period of time (60 s), and the surface can restore its intrinsic corrosion protection performance. Such superomniphobic surfaces thus offer a wide range of potential applications, including pipelines, with sustainable corrosion protection and rust inhibitors for steel in reinforced concrete.
Collapse
Affiliation(s)
- Mohammadamin Ezazi
- Department of Mechanical Engineering , University of Kansas , Lawrence , Kansas 66045 , United States
| | - Bishwash Shrestha
- Department of Mechanical Engineering , University of Kansas , Lawrence , Kansas 66045 , United States
| | - Nathan Klein
- Department of Mechanical Engineering , University of Kansas , Lawrence , Kansas 66045 , United States
| | - Duck Hyun Lee
- Green Materials and Processes Group , Korea Institute of Industrial Technology , Ulsan 44413 , Republic of Korea
| | - Sungbaek Seo
- Department of Biomaterials Science , Pusan National University , Miryang 50463 , Republic of Korea
| | - Gibum Kwon
- Department of Mechanical Engineering , University of Kansas , Lawrence , Kansas 66045 , United States
| |
Collapse
|
12
|
Bhushan B. Lessons from nature for green science and technology: an overview and bioinspired superliquiphobic/philic surfaces. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2019; 377:20180274. [PMID: 30967074 DOI: 10.1098/rsta.2018.0274] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 10/30/2018] [Indexed: 06/09/2023]
Abstract
Nature has developed materials, objects and processes that function from the macroscale to the nanoscale. The emerging field of biomimetics allows one to mimic biology or nature to develop nanomaterials, nanodevices and processes which provide desirable properties. The biologically inspired materials and structured surfaces are being explored for various commercial applications. These should have minimum human impact on the environment, leading to eco-friendly or green science and technology. There are a large number of flora and fauna including bacteria, plants, land and aquatic animals, and seashells with properties of commercial interest. The paper presents an overview of the general field of biomimetics followed by a detailed overview of mechanisms, fabrication techniques and characterization of superliquiphobic/philic surfaces and their applications. This article is part of the theme issue 'Bioinspired materials and surfaces for green science and technology'.
Collapse
Affiliation(s)
- Bharat Bhushan
- Nanoprobe Laboratory for Bio- and Nanotechnology and Biomimetics, The Ohio State University , Columbus, OH 43210-1142 , USA
| |
Collapse
|
13
|
Water drop-surface interactions as the basis for the design of anti-fogging surfaces: Theory, practice, and applications trends. Adv Colloid Interface Sci 2019; 263:68-94. [PMID: 30521982 DOI: 10.1016/j.cis.2018.11.005] [Citation(s) in RCA: 63] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Revised: 10/23/2018] [Accepted: 11/20/2018] [Indexed: 11/22/2022]
Abstract
Glass- and polymer-based materials have become essential in the fabrication of a multitude of elements, including eyeglasses, automobile windshields, bathroom mirrors, greenhouses, and food packages, which unfortunately mist up under typical operating conditions. Far from being an innocuous phenomenon, the formation of minute water drops on the surface is detrimental to their optical properties (e.g., light-transmitting capability) and, in many cases, results in esthetical, hygienic, and safety concerns. In this context, it is therefore not surprising that research in the field of fog-resistant surfaces is gaining in popularity, particularly in recent years, in view of the growing number of studies focusing on this topic. This review addresses the most relevant advances released thus far on anti-fogging surfaces, with a particular focus on coating deposition, surface micro/nanostructuring, and surface functionalization. A brief explanation of how surfaces fog up and the main issues of interest linked to fogging phenomenon, including common problems, anti-fogging strategies, and wetting states are first presented. Anti-fogging mechanisms are then discussed in terms of the morphology of water drops, continuing with a description of the main fabrication techniques toward anti-fogging property. This review concludes with the current and the future perspectives on the utility of anti-fogging surfaces for several applications and some remaining challenges in this field.
Collapse
|
14
|
Castaneda-Montes I, Ritchie A, Badyal J. Atomised spray plasma deposition of hierarchical superhydrophobic nanocomposite surfaces. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.08.054] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
15
|
Boban M, Golovin K, Tobelmann B, Gupte O, Mabry JM, Tuteja A. Smooth, All-Solid, Low-Hysteresis, Omniphobic Surfaces with Enhanced Mechanical Durability. ACS APPLIED MATERIALS & INTERFACES 2018; 10:11406-11413. [PMID: 29554432 DOI: 10.1021/acsami.8b00521] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The utility of omniphobic surfaces stems from their ability to repel a multitude of liquids, possessing a broad range of surface tensions and polarities, by causing them to bead up and either roll or slide off. These surfaces may be self-cleaning, corrosion-resistant, heat-transfer enhancing, stain-resistant or resistant to mineral- or biofouling. The majority of reported omniphobic surfaces use texture, lubricants, and/or grafted monolayers to engender these repellent properties. Unfortunately, these approaches often produce surfaces with deficiencies in long-term stability, durability, scalability, or applicability to a wide range of substrates. To overcome these limitations, we have fabricated an all-solid, substrate-independent, smooth, omniphobic coating composed of a fluorinated polyurethane and fluorodecyl polyhedral oligomeric silsesquioxane. Liquids of varying surface tension, including water, hexadecane, ethanol, and silicone oil, exhibit low-contact-angle hysteresis (<15°) on these surfaces, allowing liquid droplets to slide off, leaving no residue. Moreover, we demonstrate that these robust surfaces retained their repellent properties more effectively than textured or lubricated omniphobic surfaces after being subjected to mechanical abrasion.
Collapse
Affiliation(s)
| | | | | | | | - Joseph M Mabry
- Rocket Propulsion Division , Air Force Research Laboratory , Edwards Air Force Base , California 93524 , United States
| | | |
Collapse
|
16
|
Woo YC, Kim Y, Yao M, Tijing LD, Choi JS, Lee S, Kim SH, Shon HK. Hierarchical Composite Membranes with Robust Omniphobic Surface Using Layer-By-Layer Assembly Technique. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:2186-2196. [PMID: 29338208 DOI: 10.1021/acs.est.7b05450] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In this study, composite membranes were fabricated via layer-by-layer (LBL) assembly of negatively charged silica aerogel (SiA) and 1H,1H,2H,2H-perfluorodecyltriethoxysilane (FTCS) on a polyvinylidene fluoride phase inversion membrane and interconnecting them with positively charged poly(diallyldimethylammonium chloride) (PDDA) via electrostatic interaction. The results showed that the PDDA-SiA-FTCS coated membrane had significantly enhanced the membrane structure and properties. New trifluoromethyl and tetrafluoroethylene bonds appeared at the surface of the coated membrane, which led to lower surface free energy of the composite membrane. Additionally, the LBL membrane showed increased surface roughness. The improved structure and property gave the LBL membrane an omniphobic property, as indicated by its good wetting resistance. The membrane performed a stable air gap membrane distillation (AGMD) flux of 11.22 L/m2 h with very high salt rejection using reverse osmosis brine from coal seam gas produced water as feed with the addition of up to 0.5 mM SDS solution. This performance was much better compared to those of the neat membrane. The present study suggests that the enhanced membrane properties with good omniphobicity via LBL assembly make the porous membranes suitable for long-term AGMD operation with stable permeation flux when treating challenging saline wastewater containing low surface tension organic contaminants.
Collapse
Affiliation(s)
- Yun Chul Woo
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney (UTS) , P.O. Box 123, 15 Broadway, New South Wales 2007, Australia
- Environment and Plant Research Institute, Korea Institute of Civil Engineering and Building Technology (KICT) , 283, Goyangdae-Ro, Ilsanseo-Gu, Goyang-Si, Gyeonggi-Do 411-712, Republic of Korea
| | - Youngjin Kim
- King Abdullah University of Science and Technology (KAUST) , Water Desalination and Reuse Center (WDRC), Division of Biological & Environmental Science & Engineering (BESE), Thuwal 23955-6900, Saudi Arabia
| | - Minwei Yao
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney (UTS) , P.O. Box 123, 15 Broadway, New South Wales 2007, Australia
| | - Leonard D Tijing
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney (UTS) , P.O. Box 123, 15 Broadway, New South Wales 2007, Australia
| | - June-Seok Choi
- Environment and Plant Research Institute, Korea Institute of Civil Engineering and Building Technology (KICT) , 283, Goyangdae-Ro, Ilsanseo-Gu, Goyang-Si, Gyeonggi-Do 411-712, Republic of Korea
| | - Sangho Lee
- School of Civil and Environmental Engineering, Kookmin University , 77 Jeongneung-ro, Jung-gu, Seoul, 136-702, Republic of Korea
| | - Seung-Hyun Kim
- Department of Civil Engineering, Kyungnam University , Wolyoung-dong, Changwon 631-701, Republic of Korea
| | - Ho Kyong Shon
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney (UTS) , P.O. Box 123, 15 Broadway, New South Wales 2007, Australia
| |
Collapse
|
17
|
Adaptable Fabrication Techniques for Mechanically Durable Superliquiphobic/philic Surfaces. Biomimetics (Basel) 2018. [DOI: 10.1007/978-3-319-71676-3_11] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
|
18
|
Bhushan B. Strategies for Superliquiphobic/Philic Surfaces. Biomimetics (Basel) 2018. [DOI: 10.1007/978-3-319-71676-3_10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
|
19
|
Fenero M, Palenzuela J, Azpitarte I, Knez M, Rodríguez J, Tena-Zaera R. Laponite-Based Surfaces with Holistic Self-Cleaning Functionality by Combining Antistatics and Omniphobicity. ACS APPLIED MATERIALS & INTERFACES 2017; 9:39078-39085. [PMID: 29039644 DOI: 10.1021/acsami.7b13535] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In the present work, perfluoroalkylated laponite nanoparticles with a high degree of functionalization (60 wt %) have been prepared and a methodology to prepare transparent, antistatic, and omniphobic laponite-based films with holistic self-cleaning properties against liquids, solids and liquid-solid mixtures has been developed. The intrinsic electrical and ionic conductivities observed in unmodified laponite coatings are combined with perfluoroalkyl-modified laponite clays. As a result, films with improved self-cleaning functionality based on dust-repellency and omniphobic liquid-repellence (sheet resistance in the range of 107 Ω/□ and contact angles of 106° (H2O) and 93° (oil)) were obtained. These unique films, being capable to repel dust and liquids, were applied to a variety of substrates (i.e., glass and plastics) and tested against solids and liquids of different nature with excellent performance. Bending tests of these holistic self-cleaning films deposited over flexible substrates showed better mechanical performance than unmodified laponite films.
Collapse
Affiliation(s)
- Marta Fenero
- IK4-CIDETEC , Parque Tecnológico de San Sebastián, Paseo Miramón, 196, 20014 Donostia - San Sebastián, Spain
| | - Jesús Palenzuela
- IK4-CIDETEC , Parque Tecnológico de San Sebastián, Paseo Miramón, 196, 20014 Donostia - San Sebastián, Spain
| | - Itxasne Azpitarte
- CIC nanoGUNE , Tolosa Hiribidea, 76, 20018 Donostia - San Sebastián, Spain
| | - Mato Knez
- CIC nanoGUNE , Tolosa Hiribidea, 76, 20018 Donostia - San Sebastián, Spain
- Ikerbasque, Basque Foundation for Science , Maria Díaz de Haro 3, 48013 Bilbao, Spain
| | - Javier Rodríguez
- IK4-CIDETEC , Parque Tecnológico de San Sebastián, Paseo Miramón, 196, 20014 Donostia - San Sebastián, Spain
| | - Ramón Tena-Zaera
- IK4-CIDETEC , Parque Tecnológico de San Sebastián, Paseo Miramón, 196, 20014 Donostia - San Sebastián, Spain
| |
Collapse
|
20
|
Zhi J, Zhang LZ. Durable superhydrophobic surfaces made by intensely connecting a bipolar top layer to the substrate with a middle connecting layer. Sci Rep 2017; 7:9946. [PMID: 28855559 PMCID: PMC5577250 DOI: 10.1038/s41598-017-10030-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Accepted: 08/02/2017] [Indexed: 11/16/2022] Open
Abstract
This study reported a simple fabrication method for a durable superhydrophobic surface. The superhydrophobic top layer of the durable superhydrophobic surface was connected intensely to the substrate through a middle connecting layer. Glycidoxypropyltrimethoxysilane (KH-560) after hydrolysis was used to obtain a hydrophilic middle connecting layer. It could be adhered to the hydrophilic substrate by covalent bonds. Ring-open reaction with octadecylamine let the KH-560 middle layer form a net-like structure. The net-like sturcture would then encompass and station the silica particles that were used to form the coarse micro structures, intensely to increase the durability. The top hydrophobic layer with nano-structures was formed on the KH-560 middle layer. It was obtained by a bipolar nano-silica solution modified by hexamethyldisilazane (HMDS). This layer was connected to the middle layer intensely by the polar Si hydroxy groups, while the non-polar methyl groups on the surface, accompanied by the micro and nano structures, made the surface rather hydrophobic. The covalently interfacial interactions between the substrate and the middle layer, and between the middle layer and the top layer, strengthened the durability of the superhydrophobic surface. The abrasion test results showed that the superhydrophobic surface could bear 180 abrasion cycles on 1200 CW sandpaper under 2 kPa applied pressure.
Collapse
Affiliation(s)
- Jinghui Zhi
- Key Laboratory of Enhanced Heat Transfer and Energy Conservation of Education Ministry, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, China
| | - Li-Zhi Zhang
- Key Laboratory of Enhanced Heat Transfer and Energy Conservation of Education Ministry, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, China. .,State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou, 510640, China.
| |
Collapse
|
21
|
Scarratt LR, Steiner U, Neto C. A review on the mechanical and thermodynamic robustness of superhydrophobic surfaces. Adv Colloid Interface Sci 2017; 246:133-152. [PMID: 28577754 DOI: 10.1016/j.cis.2017.05.018] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Revised: 05/15/2017] [Accepted: 05/29/2017] [Indexed: 12/15/2022]
Abstract
Advancements in the fabrication and study of superhydrophobic surfaces have been significant over the past 10years, and some 20years after the discovery of the lotus effect, the study of special wettability surfaces can be considered mainstream. While the fabrication of superhydrophobic surfaces is well advanced and the physical properties of superhydrophobic surfaces well-understood, the robustness of these surfaces, both in terms of mechanical and thermodynamic properties, are only recently getting attention in the literature. In this review we cover publications that appeared over the past ten years on the thermodynamic and mechanical robustness of superhydrophobic surfaces, by which we mean the long term stability under conditions of wear, shear and pressure. The review is divided into two parts, the first dedicated to thermodynamic robustness and the second dedicated to mechanical robustness of these complex surfaces. Our work is intended as an introductory review for researchers interested in addressing longevity and stability of superhydrophobic surfaces, and provides an outlook on outstanding aspects of investigation.
Collapse
|
22
|
Martin S, Brown PS, Bhushan B. Fabrication techniques for bioinspired, mechanically-durable, superliquiphobic surfaces for water, oil, and surfactant repellency. Adv Colloid Interface Sci 2017; 241:1-23. [PMID: 28143675 DOI: 10.1016/j.cis.2017.01.004] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2016] [Revised: 12/07/2016] [Accepted: 01/18/2017] [Indexed: 11/16/2022]
Abstract
Nature provides inspiration for liquid-repellant and low-adhesive surfaces, such as the lotus leaf and pitcher plant. While water-repellency is frequently found in nature, oil-repellency and surfactant-repellency are uncommon to nonexistent. To obtain oil- and surfactant-repellency, hierarchical, re-entrant, bioinspired surface structures along with low surface energy materials are needed. This overview presents wetting literature, common liquids and their composition, and fabrication techniques for superliquiphobic surfaces with repellency toward water, oil, and surfactant-containing liquids. Four techniques for creating such surfaces are explained in detail: nanoparticle/binder, layer-by-layer, nanoparticle-encapsulation, and liquid-impregnation. Static contact and tilt angles with water and hexadecane liquids, morphology, wear, transparency, self-cleaning, anti-smudge, and oil-water separation data are examined to compare the techniques. Data for these techniques are presented showing evidence of re-entrant geometry and the ability for these surfaces to repel surfactant-containing liquids such as shampoo and laundry detergent. The data will provide guidance in implementing superliquiphobic surfaces for self-cleaning, anti-smudge, antifouling, and low-adhesion properties for various applications including plastic packaging and biomedical devices.
Collapse
Affiliation(s)
- Samuel Martin
- Nanoprobe Laboratory for Bio & Nanotechnology and Biomimetics (NLBB), The Ohio State University, 201 W. 19th Avenue, Columbus, OH 43210-1142, USA
| | - Philip S Brown
- Nanoprobe Laboratory for Bio & Nanotechnology and Biomimetics (NLBB), The Ohio State University, 201 W. 19th Avenue, Columbus, OH 43210-1142, USA
| | - Bharat Bhushan
- Nanoprobe Laboratory for Bio & Nanotechnology and Biomimetics (NLBB), The Ohio State University, 201 W. 19th Avenue, Columbus, OH 43210-1142, USA.
| |
Collapse
|
23
|
Tailoring surface charge and wetting property for robust oil-fouling mitigation in membrane distillation. J Memb Sci 2016. [DOI: 10.1016/j.memsci.2016.06.011] [Citation(s) in RCA: 98] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
|
24
|
Papadopoulos P, Vollmer D, Butt HJ. Long-Term Repellency of Liquids by Superoleophobic Surfaces. PHYSICAL REVIEW LETTERS 2016; 117:046102. [PMID: 27494484 DOI: 10.1103/physrevlett.117.046102] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Indexed: 05/15/2023]
Abstract
Applications of superoleophobic surfaces depend on the stability of the air cushion formed under liquid drops. To analyze the longevity of air cushions we used reflection-interference contrast microscopy (RICM) for drops on a porous fractal-like structure of sintered nanoparticles. RICM permits us to monitor the height of the air cushion with nanometer resolution. Whereas the air cushion under all investigated liquids was stable on a time scale of a few seconds to minutes and liquids rolled off, liquids with low surface tension penetrated the coating on the time scale of hours and longer. The penetration speed showed a power law dependence on time, dz/dt∼t^{p}, the exponent p varying from -0.5 to -1.2. Thus, penetration is qualitatively different from the Lucas-Washburn law that governs spontaneous capillary filling of porous structures.
Collapse
Affiliation(s)
| | - Doris Vollmer
- Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany
| | - Hans-Jürgen Butt
- Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany
| |
Collapse
|
25
|
Chen F, Liu J, Cui Y, Huang S, Song J, Sun J, Xu W, Liu X. Stability of plasma treated superhydrophobic surfaces under different ambient conditions. J Colloid Interface Sci 2016; 470:221-228. [PMID: 26945118 DOI: 10.1016/j.jcis.2016.02.058] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2015] [Revised: 02/26/2016] [Accepted: 02/27/2016] [Indexed: 10/22/2022]
Abstract
Plasma hydrophilizing of superhydrophobic substrates has become an important area of research, for example, superhydrophobic-(super)hydrophilic patterned surfaces have significant practical applications such as lab-on-chip systems, cell adhesion, and control of liquid transport. However, the stability of plasma-induced hydrophilicity is always considered as a key issue since the wettability tends to revert back to the untreated state (i.e. aging behavior). This paper focuses on the stability of plasma treated superhydrophobic surface under different ambient conditions (e.g. temperature and relative humidity). Water contact angle measurement and X-ray photoelectron spectroscopy are used to monitor the aging process. Results show that low temperature and low relative humidity are favorable to retard the aging process and that pre-storage at low temperature (-10°C) disables the treated surface to recover superhydrophobicity. When the aging is performed in water, a long-lasting hydropholicity is obtained. As the stability of plasma-induced hydrophilcity over a desired period of time is a very important issue, this work will contribute to the optimization of storage conditions of plasma treated superhydrophobic surfaces.
Collapse
Affiliation(s)
- Faze Chen
- Key Laboratory for Precision and Non-Traditional Machining Technology of Ministry of Education, School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Jiyu Liu
- Key Laboratory for Precision and Non-Traditional Machining Technology of Ministry of Education, School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Yao Cui
- Key Laboratory for Precision and Non-Traditional Machining Technology of Ministry of Education, School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Shuai Huang
- Key Laboratory for Precision and Non-Traditional Machining Technology of Ministry of Education, School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Jinlong Song
- Key Laboratory for Precision and Non-Traditional Machining Technology of Ministry of Education, School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Jing Sun
- Key Laboratory for Precision and Non-Traditional Machining Technology of Ministry of Education, School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Wenji Xu
- Key Laboratory for Precision and Non-Traditional Machining Technology of Ministry of Education, School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, China
| | - Xin Liu
- Key Laboratory for Precision and Non-Traditional Machining Technology of Ministry of Education, School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, China.
| |
Collapse
|
26
|
Tian H, Wang F, Ge S, Ou J, Li W, Yu S. A simple and effective way to fabricate mechanical robust superhydrophobic surfaces. RSC Adv 2016. [DOI: 10.1039/c6ra04364j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The SH surface is mechanical robust against abrading, finger touch, brushing and scratching, as well as high pressure water impacting.
Collapse
Affiliation(s)
- Hao Tian
- School of Materials Science and Engineering
- Nanchang Hangkong University
- Nanchang 330063
- P. R. China
| | - Fajun Wang
- School of Materials Science and Engineering
- Nanchang Hangkong University
- Nanchang 330063
- P. R. China
| | - Sijie Ge
- School of Materials Science and Engineering
- Nanchang Hangkong University
- Nanchang 330063
- P. R. China
| | - Junfei Ou
- School of Materials Science and Engineering
- Nanchang Hangkong University
- Nanchang 330063
- P. R. China
| | - Wen Li
- School of Materials Science and Engineering
- Nanchang Hangkong University
- Nanchang 330063
- P. R. China
| | - Shijin Yu
- School of Mechanical and Electronic Engineering
- Jingdezhen Ceramic Institute
- Jingdezhen 333403
- P. R. China
| |
Collapse
|
27
|
Modeling, Fabrication, and Characterization of Superoleophobic/Philic Surfaces. Biomimetics (Basel) 2016. [DOI: 10.1007/978-3-319-28284-8_9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
|
28
|
Brown PS, Bhushan B. Bioinspired, roughness-induced, water and oil super-philic and super-phobic coatings prepared by adaptable layer-by-layer technique. Sci Rep 2015; 5:14030. [PMID: 26353971 PMCID: PMC4564852 DOI: 10.1038/srep14030] [Citation(s) in RCA: 99] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2015] [Accepted: 08/13/2015] [Indexed: 11/12/2022] Open
Abstract
Coatings with specific surface wetting properties are of interest for anti-fouling, anti-fogging, anti-icing, self-cleaning, anti-smudge, and oil-water separation applications. Many previous bioinspired surfaces are of limited use due to a lack of mechanical durability. Here, a layer-by-layer technique is utilized to create coatings with four combinations of water and oil repellency and affinity. An adapted layer-by-layer approach is tailored to yield specific surface properties, resulting in a durable, functional coating. This technique provides necessary flexibility to improve substrate adhesion combined with desirable surface chemistry. Polyelectrolyte binder, SiO2 nanoparticles, and silane or fluorosurfactant layers are deposited, combining surface roughness and necessary chemistry to result in four different coatings: superhydrophilic/superoleophilic, superhydrophobic/superoleophilic, superhydrophobic/superoleophobic, and superhydrophilic/superoleophobic. The superoleophobic coatings display hexadecane contact angles >150° with tilt angles <5°, whilst the superhydrophobic coatings display water contact angles >160° with tilt angles <2°. One coating combines both oleophobic and hydrophobic properties, whilst others mix and match oil and water repellency and affinity. Coating durability was examined through the use of micro/macrowear experiments. These coatings display transparency acceptable for some applications. Fabrication via this novel combination of techniques results in durable, functional coatings displaying improved performance compared to existing work where either durability or functionality is compromised.
Collapse
Affiliation(s)
- Philip S Brown
- Nanoprobe Laboratory for Bio- &Nanotechnology and Biomimetics (NLBB), The Ohio State University, 201 W. 19th Avenue, Columbus, OH 43210-1142, USA
| | - Bharat Bhushan
- Nanoprobe Laboratory for Bio- &Nanotechnology and Biomimetics (NLBB), The Ohio State University, 201 W. 19th Avenue, Columbus, OH 43210-1142, USA
| |
Collapse
|