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He Z, Mu L, Wang N, Su J, Wang Z, Luo M, Zhang C, Li G, Lan X. Design, fabrication, and applications of bioinspired slippery surfaces. Adv Colloid Interface Sci 2023; 318:102948. [PMID: 37331090 DOI: 10.1016/j.cis.2023.102948] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2023] [Revised: 05/30/2023] [Accepted: 06/10/2023] [Indexed: 06/20/2023]
Abstract
Bioinspired slippery surfaces (BSSs) have attracted considerable attention owing to their antifouling, drag reduction, and self-cleaning properties. Accordingly, various technical terms have been proposed for describing BSSs based on specific surface characteristics. However, the terminology can often be confusing, with similar-sounding terms having different meanings. Additionally, some terms fail to fully or accurately describe BSS characteristics, such as the surface wettability of lubricants (hydrophilic or hydrophobic), surface wettability anisotropy (anisotropic or isotropic), and substrate morphology (porous or smooth). Therefore, a timely and thorough review is required to clarify and distinguish the various terms used in BSS literature. This review initially categorizes BSSs into four types: slippery solid surfaces (SSSs), slippery liquid-infused surfaces (SLISs), slippery liquid-like surfaces (SLLSs), and slippery liquid-solid surfaces (SLSSs). Because SLISs have been the primary research focus in this field, we thoroughly review their design and fabrication principles, which can also be applied to the other three types of BSS. Furthermore, we discuss the existing BSS fabrication methods, smart BSS systems, antifouling applications, limitations of BSS, and future research directions. By providing comprehensive and accurate definitions of various BSS types, this review aims to assist researchers in conveying their results more clearly and gaining a better understanding of the literature.
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Affiliation(s)
- Zhoukun He
- Institute for Advanced Study, Research Center of Composites & Surface and Interface Engineering, Chengdu University, Chengdu 610106, China
| | - Linpeng Mu
- Institute for Advanced Study, Research Center of Composites & Surface and Interface Engineering, Chengdu University, Chengdu 610106, China; School of Mechanical Engineering, Chengdu University, Chengdu 610106, China
| | - Na Wang
- Institute for Advanced Study, Research Center of Composites & Surface and Interface Engineering, Chengdu University, Chengdu 610106, China; School of Mechanical Engineering, Chengdu University, Chengdu 610106, China
| | - Jie Su
- Institute for Advanced Study, Research Center of Composites & Surface and Interface Engineering, Chengdu University, Chengdu 610106, China; School of Mechanical Engineering, Chengdu University, Chengdu 610106, China
| | - Zhuo Wang
- Institute for Advanced Study, Research Center of Composites & Surface and Interface Engineering, Chengdu University, Chengdu 610106, China; School of Mechanical Engineering, Chengdu University, Chengdu 610106, China
| | - Mingdong Luo
- Luzhou Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, The Affiliated Stomatological Hospital of Southwest Medical University, Luzhou 646000, China; Institute of Stomatology, Southwest Medical University, Luzhou 646000, China
| | - Chunle Zhang
- Kidney Research Institute, Division of Nephrology, West China Hospital of Sichuan University, Chengdu 610041, China.
| | - Guangwen Li
- Luzhou Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, The Affiliated Stomatological Hospital of Southwest Medical University, Luzhou 646000, China; Institute of Stomatology, Southwest Medical University, Luzhou 646000, China.
| | - Xiaorong Lan
- Luzhou Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, The Affiliated Stomatological Hospital of Southwest Medical University, Luzhou 646000, China; Institute of Stomatology, Southwest Medical University, Luzhou 646000, China.
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2
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Hou S, Noh I, Shi X, Wang Y, Do Kim H, Ohkita H, Wang B. Facile fabrication of flexible superhydrophobic surfaces with high durability and good mechanical strength through embedding silica nanoparticle into polymer substrate by spraying method. Colloids Surf A Physicochem Eng Asp 2023. [DOI: 10.1016/j.colsurfa.2023.131181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
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3
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Chiera S, Koch VM, Bleyer G, Walter T, Bittner C, Bachmann J, Vogel N. From Sticky to Slippery: Self-Functionalizing Lubricants for In Situ Fabrication of Liquid-Infused Surfaces. ACS APPLIED MATERIALS & INTERFACES 2022; 14:16735-16745. [PMID: 35353481 DOI: 10.1021/acsami.2c02390] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Liquid-infused surfaces offer a versatile approach to create self-cleaning coatings. In such coatings, a thin film of a fluid lubricant homogeneously coats the substrate and thus prevents direct contact with a second, contaminating liquid. For stable repellency, the interfacial energies need to be controlled to ensure that the lubricant is not replaced by the contaminating liquid. Here, we introduce the concept of self-functionalizing lubricants. Functional molecular species that chemically match the lubricant but possess selective anchor groups are dissolved in the lubricant and self-adhere to the surface, forming the required surface chemistry in situ from within the applied lubricant layer. To add flexibility to the self-functionalizing concept, the substrate is first primed with a thin polydopamine base layer, which can be deposited to nearly any substrate material from aqueous solutions and retains reactivity toward electron-donating groups such as amines. The temporal progression of the in situ functionalization is investigated by ellipsometry and quartz crystal microbalance and correlated to macroscopic changes in contact angle and contact angle hysteresis. The flexibility of the approach is underlined by creating repellent coatings with various substrate/lubricant combinations. The prepared liquid-infused surfaces significantly reduce cement adhesion and provide easy-to-clean systems under real-world conditions on shoe soles.
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Affiliation(s)
- Salvatore Chiera
- Institute of Particle Technology (LFG), Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Cauerstraße 4, 91058 Erlangen, Germany
- Interdisciplinary Center for Functional Particle Systems, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen 91058, Germany
| | - Vanessa M Koch
- Chair 'Chemistry of Thin Film Materials' (CTFM), Friedrich-Alexander University Erlangen-Nürnberg (FAU), IZNF, Cauerstraße 3, 91058 Erlangen, Germany
| | - Gudrun Bleyer
- Institute of Particle Technology (LFG), Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Cauerstraße 4, 91058 Erlangen, Germany
- Interdisciplinary Center for Functional Particle Systems, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen 91058, Germany
| | - Teresa Walter
- Institute of Particle Technology (LFG), Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Cauerstraße 4, 91058 Erlangen, Germany
- Interdisciplinary Center for Functional Particle Systems, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen 91058, Germany
| | - Carina Bittner
- Institute of Particle Technology (LFG), Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Cauerstraße 4, 91058 Erlangen, Germany
- Interdisciplinary Center for Functional Particle Systems, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen 91058, Germany
| | - Julien Bachmann
- Chair 'Chemistry of Thin Film Materials' (CTFM), Friedrich-Alexander University Erlangen-Nürnberg (FAU), IZNF, Cauerstraße 3, 91058 Erlangen, Germany
| | - Nicolas Vogel
- Institute of Particle Technology (LFG), Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Cauerstraße 4, 91058 Erlangen, Germany
- Interdisciplinary Center for Functional Particle Systems, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen 91058, Germany
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Yu Y, Cui W, Song L, Liao Q, Ma K, Zhong S, Yue H, Liang B. Design of Organic-Free Superhydrophobic TiO 2 with Ultraviolet Stability or Ultraviolet-Induced Switchable Wettability. ACS APPLIED MATERIALS & INTERFACES 2022; 14:9864-9872. [PMID: 35138795 DOI: 10.1021/acsami.1c24083] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Superhydrophobic TiO2 with great application potential is mainly obtained by surface modification with low surface energy organics, which is easily degraded under sunlight irradiation, which results in the loss of superhydrophobic properties. Herein, we developed a room-temperature pulsed chemical vapor deposition (pulsed CVD) method to develop amorphous TiO2-deposited TiO2 nanoparticles. The ultraviolet stability/ultraviolet-induced reversible wettability switch had been simultaneously realized by different and controllable deposition cycles of amorphous TiO2. The superhydrophobic properties of the organic-free TiO2 were determined by the micrometer-nanometer-sub-nanometer multiscale structure, the multiscale pore structure, and the large Young's contact angle resulting from carboxylic acid adsorption. Also, we found that the adsorption rate and adsorption stability of oxygen and water at the surface oxygen vacancies were the key to facilitate the reversible switching between superhydrophilic and superhydrophobic states, which was well demonstrated by experimental characterization and theoretical simulation. In addition, we also found that the resistance of dense amorphous TiO2 films on the TiO2 surface to the migration of photogenerated electrons and holes was the key to maintain the stable superhydrophobic properties of superhydrophobic TiO2 under ultraviolet illumination. The powders were strongly ground and the coating surface was rubbed on the surface of the sandpaper, which still maintained superhydrophobic properties, providing favorable conditions for the application of superhydrophobic TiO2. This work modulates the ultraviolet stability and dark/ultraviolet-induced switchable superhydrophobicity/superhydrophilicity of coated TiO2 by simply adjusting the number of deposition times in a pulsed CVD process for the first time, thus contributing to the development of organic-free superhydrophobic TiO2.
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Affiliation(s)
- Yangyang Yu
- Low-Carbon Technology and Chemical Reaction Engineering Laboratory, School of Chemical Engineering, Sichuan University, Chengdu 610065, China
- Yangtze Delta Region Institute (Huzhou) & Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Huzhou 313001, China
| | - Wen Cui
- College of Resources and Environmental Engineering, Guizhou University, Guiyang, Guizhou 550025, China
| | - Lei Song
- Low-Carbon Technology and Chemical Reaction Engineering Laboratory, School of Chemical Engineering, Sichuan University, Chengdu 610065, China
| | - Qingdian Liao
- Low-Carbon Technology and Chemical Reaction Engineering Laboratory, School of Chemical Engineering, Sichuan University, Chengdu 610065, China
| | - Kui Ma
- Low-Carbon Technology and Chemical Reaction Engineering Laboratory, School of Chemical Engineering, Sichuan University, Chengdu 610065, China
| | - Shan Zhong
- Low-Carbon Technology and Chemical Reaction Engineering Laboratory, School of Chemical Engineering, Sichuan University, Chengdu 610065, China
| | - Hairong Yue
- Low-Carbon Technology and Chemical Reaction Engineering Laboratory, School of Chemical Engineering, Sichuan University, Chengdu 610065, China
| | - Bin Liang
- Low-Carbon Technology and Chemical Reaction Engineering Laboratory, School of Chemical Engineering, Sichuan University, Chengdu 610065, China
- Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610207, China
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Rius-Ayra O, Bouhnouf-Riahi O, LLorca-Isern N. Superhydrophobic and Sustainable Nanostructured Powdered Iron for the Efficient Separation of Oil-in-Water Emulsions and the Capture of Microplastics. ACS APPLIED MATERIALS & INTERFACES 2020; 12:45629-45640. [PMID: 32926613 DOI: 10.1021/acsami.0c13876] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The pollution of oceans and seas by oils and microplastics is a significant global issue affecting the economy and environment. Therefore, it is necessary to search for different technologies that can remove these pollutants in a sustainable way. Herein, superhydrophobic powdered iron was used to efficiently separate stabilized oil-in-water emulsions and, remarkably, capture microplastic fibers. High-energy ball milling of iron particles was applied to decrease particle size, increase the specific surface area, and produce a nanostructured material. This was combined with the liquid phase deposition of lauric acid to modify the surface free energy. The nanostructured powder showed superhydrophobicity (WCA = 154°) and superoleophilicity (OCA = 0°), which were fundamental in separating stabilized oil-in-water emulsions of hexane with an efficiency close to 100%. Because of the superhydrophobic/superoleophilic properties of the powdered iron and its intrinsic properties of being able to freely move and adapt to the different morphologies of microplastics under continuous stirring, this material can capture microplastic fibers. Thus, we present a novel dual application of a superhydrophobic material, which includes the capture of microplastics. This has not been reported previously and provides a new scope for future environmental sustainability.
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Affiliation(s)
- O Rius-Ayra
- CPCM Departament de Ciència dels Materials i Química Física, Facultat de Química, Universitat de Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain
| | - O Bouhnouf-Riahi
- CPCM Departament de Ciència dels Materials i Química Física, Facultat de Química, Universitat de Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain
| | - N LLorca-Isern
- CPCM Departament de Ciència dels Materials i Química Física, Facultat de Química, Universitat de Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain
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6
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Non-Fluorinated, Sustainable, and Durable Superhydrophobic Microarrayed Surface for Water-Harvesting. COATINGS 2020. [DOI: 10.3390/coatings10040314] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Water scarcity is a worldwide issue that significantly affects the environment, population, and economy of the arid zones. In this study, we report a straightforward method for water-harvesting based on modifications of the surface wettability. Using magnesium chloride, lauric acid, and electrodeposition process, a superhydrophobic surface (155°) is obtained. Morphological characterization techniques allow determination of the characteristic flower-like microstructures combined with close packed nanoarrays that lead to the hierarchical structure. Furthermore, the coating presents vertically aligned microarrays in a non-linear cone morphology formed by dynamic templating of hydrogen bubbles. From a chemical point of view, magnesium laurate is responsible for the surface tension decrease. To determine the durability of the obtained surface ultra-violet (UV) light test and abrasive paper test, tests are carried out revealing high durability against these severe conditions. The water-harvesting ability of the superhydrophobic surface is studied at 45° and 90° tilted samples. The capacity of the water to be harvested efficiently is found to be at 90° tilt under fog conditions. The use of green reactants associated with this hierarchical structure broadens a new scope for sustainable freshwater collection and it becomes an excellent example of a green solution.
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Cai Y, Zhao Q, Quan X, Feng W, Wang Q. Fluorine-free and hydrophobic hexadecyltrimethoxysilane-TiO2 coated mesh for gravity-driven oil/water separation. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2019.124189] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Liu M, Luo Y, Jia D. Polydimethylsiloxane-based superhydrophobic membranes: fabrication, durability, repairability, and applications. Polym Chem 2020. [DOI: 10.1039/c9py01861a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A polydimethylsiloxane-based superhydrophobic membrane with durability and repairability characteristics has been fabricated.
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Affiliation(s)
- Maolin Liu
- School of Materials Science and Engineering
- South China University of Technology
- Guangzhou 510640
- People's Republic of China
| | - Yuanfang Luo
- School of Materials Science and Engineering
- South China University of Technology
- Guangzhou 510640
- People's Republic of China
| | - Demin Jia
- School of Materials Science and Engineering
- South China University of Technology
- Guangzhou 510640
- People's Republic of China
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9
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Kulka MW, Donskyi IS, Wurzler N, Salz D, Özcan Ö, Unger WES, Haag R. Mussel-Inspired Multivalent Linear Polyglycerol Coatings Outperform Monovalent Polyethylene Glycol Coatings in Antifouling Surface Properties. ACS APPLIED BIO MATERIALS 2019; 2:5749-5759. [DOI: 10.1021/acsabm.9b00786] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Michaël W. Kulka
- Institute for Chemistry and Biochemistry, Freie Universität Berlin, Takustraße 3, 14195 Berlin, Germany
| | - Ievgen S. Donskyi
- Institute for Chemistry and Biochemistry, Freie Universität Berlin, Takustraße 3, 14195 Berlin, Germany
- BAM − Federal Institute for Material Research and Testing, Division of Surface Analysis and Interfacial Chemistry, Unter den Eichen 44-46, 12205 Berlin, Germany
| | - Nina Wurzler
- BAM − Federal Institute for Material Research and Testing, Division of Surface Analysis and Interfacial Chemistry, Unter den Eichen 44-46, 12205 Berlin, Germany
| | - Dirk Salz
- Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM, Wiener Straße12, 28359 Bremen, Germany
| | - Özlem Özcan
- BAM − Federal Institute for Material Research and Testing, Division of Surface Analysis and Interfacial Chemistry, Unter den Eichen 44-46, 12205 Berlin, Germany
| | - Wolfgang E. S. Unger
- BAM − Federal Institute for Material Research and Testing, Division of Surface Analysis and Interfacial Chemistry, Unter den Eichen 44-46, 12205 Berlin, Germany
| | - Rainer Haag
- Institute for Chemistry and Biochemistry, Freie Universität Berlin, Takustraße 3, 14195 Berlin, Germany
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10
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Han K, Heng L, Zhang Y, Liu Y, Jiang L. Slippery Surface Based on Photoelectric Responsive Nanoporous Composites with Optimal Wettability Region for Droplets' Multifunctional Manipulation. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2019; 6:1801231. [PMID: 30643721 PMCID: PMC6325596 DOI: 10.1002/advs.201801231] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2018] [Revised: 09/27/2018] [Indexed: 05/18/2023]
Abstract
The development of responsive slippery surfaces is important because of the high demand for such materials in the fields of liquid manipulation on biochips, microfluidics, microreactions, and liquid-harvesting devices. Although great progress has been achieved, the effect of substrate wettability on slippery surfaces stability is overlooked by scientists. In addition, current responsive slippery surfaces generally function utilizing single external stimuli just for imprecisely controlling liquid motion, while advanced intelligences are always expected to be integrated into one smart interface material for widespread multifunctional applications. Therefore, designing slippery surfaces that collaboratively respond to complex external stimuli and possess sophisticated composite function for expanding applications from controlling droplets motion to patterned writing is urgently needed but remains a challenge. Here, a photoelectric cooperative-responsive slippery surface based on ZnO nanoporous composites is demonstrated. First, the effect of composite surface wettability on slippery surface stability is systematically researched and the optimum wettability region for fabricating stable slippery surfaces is determined. Furthermore, controllable droplet motion and patterned writing are realized on the same slippery surfaces under photoelectric cooperative stimuli, and the related response mechanism is also deeply studied. This kind of material has potential applications in biochips, microfluidics, in situ patterning, and water-harvesting systems.
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Affiliation(s)
- Keyu Han
- Key Laboratory of Bio‐Inspired Smart Interfacial Science and Technology of Ministry of EducationBeijing Key Laboratory of Bio‐inspired Energy Materials and DevicesSchool of ChemistryBeihang UniversityBeijing100191China
| | - Liping Heng
- Key Laboratory of Bio‐Inspired Smart Interfacial Science and Technology of Ministry of EducationBeijing Key Laboratory of Bio‐inspired Energy Materials and DevicesSchool of ChemistryBeihang UniversityBeijing100191China
| | - Yuqi Zhang
- College of Chemistry and Chemical EngineeringYan'an UniversityYan'anShaanxi716000P. R. China
| | - Yao Liu
- College of Chemistry and Chemical EngineeringYan'an UniversityYan'anShaanxi716000P. R. China
| | - Lei Jiang
- Key Laboratory of Bio‐Inspired Smart Interfacial Science and Technology of Ministry of EducationBeijing Key Laboratory of Bio‐inspired Energy Materials and DevicesSchool of ChemistryBeihang UniversityBeijing100191China
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Sun Y, Huang J, Zhao S, Guo Z. Fabrication of durable self-repairing superhydrophobic fabrics via a fluorinate-free waterborne biomimetic silicification strategy. NEW J CHEM 2019. [DOI: 10.1039/c9nj00019d] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
A water-based methodology integrating an in situ biomimetic silicification and fluorinate-free modification strategy for preparing self-repairing superhydrophobic fabrics is presented.
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Affiliation(s)
- Yihan Sun
- State Key Laboratory of Solid Lubrication
- Lanzhou Institute of Chemical Physics
- Chinese Academy of Sciences
- Lanzhou 730000
- China
| | - Jinxia Huang
- State Key Laboratory of Solid Lubrication
- Lanzhou Institute of Chemical Physics
- Chinese Academy of Sciences
- Lanzhou 730000
- China
| | - Siyang Zhao
- State Key Laboratory of Solid Lubrication
- Lanzhou Institute of Chemical Physics
- Chinese Academy of Sciences
- Lanzhou 730000
- China
| | - Zhiguang Guo
- State Key Laboratory of Solid Lubrication
- Lanzhou Institute of Chemical Physics
- Chinese Academy of Sciences
- Lanzhou 730000
- China
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Li M, Schlaich C, Willem Kulka M, Donskyi IS, Schwerdtle T, Unger WES, Haag R. Mussel-inspired coatings with tunable wettability, for enhanced antibacterial efficiency and reduced bacterial adhesion. J Mater Chem B 2019. [DOI: 10.1039/c9tb00534j] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The mussel-inspired coatings with tunable wettability were designed, showing enhanced antibacterial efficiency and reduced bacterial adhesion.
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Affiliation(s)
- Mingjun Li
- Institute of Chemistry and Biochemistry
- Freie Universität Berlin
- Berlin
- Germany
| | - Christoph Schlaich
- Institute of Chemistry and Biochemistry
- Freie Universität Berlin
- Berlin
- Germany
| | | | - Ievgen S. Donskyi
- Institute of Chemistry and Biochemistry
- Freie Universität Berlin
- Berlin
- Germany
- BAM – Federal Institute for Material Science and Testing
| | - Tanja Schwerdtle
- Institute of Nutritional Science
- Department of Food Chemistry
- University of Potsdam
- D-14558 Nuthetal
- Germany
| | - Wolfgang E. S. Unger
- BAM – Federal Institute for Material Science and Testing
- Division of Surface Analysis and Interfacial Chemistry
- 12205 Berlin
- Germany
| | - Rainer Haag
- Institute of Chemistry and Biochemistry
- Freie Universität Berlin
- Berlin
- Germany
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13
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Abstract
Bio-inspired fluorine-free and self-cleaning polymer coatings were developed using a combination of self-assembly and UV-printing processes. Nasturtium and lotus leaves were selected as natural template surfaces. A UV-curable acrylate oligomer and three acrylated siloxane comonomers with different molecular weights were used. The spontaneous migration of the comonomers towards the polymer–air interface was found to be faster for comonomers with higher molecular weight, and enabled to create hydrophobic surfaces with a water contact angle (WCA) of 105°. The replication fidelity was limited for the nasturtium surface, due to a lack of replication of the sub-micron features. It was accurate for the lotus leaf surface whose hierarchical texture, comprising micropapillae and sub-micron crystalloids, was well reproduced in the acrylate/comonomer material. The WCA of synthetic replica of lotus increased from 144° to 152° with increasing creep time under pressure to 5 min prior to polymerization. In spite of a water sliding angle above 10°, the synthetic lotus surface was self-cleaning with water droplets when contaminated with hydrophobic pepper particles, provided that the droplets had some kinetic energy.
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14
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Zhan S, Pan Y, Gao ZF, Lou X, Xia F. Biological and chemical sensing applications based on special wettable surfaces. Trends Analyt Chem 2018. [DOI: 10.1016/j.trac.2018.09.001] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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15
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Zhang Y, Yao D, Wang S, Xiao Z, Yu X. Large-scale fabrication of waterborne superamphiphobic coatings for flexible applications. RSC Adv 2018; 8:36375-36382. [PMID: 35558469 PMCID: PMC9088758 DOI: 10.1039/c8ra06942e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Accepted: 10/15/2018] [Indexed: 01/21/2023] Open
Abstract
In recent years, there have been great achievements in superhydrophobic coatings. However, there are still some barriers restricting superhydrophobic coatings in practical applications, such as widely used organic solvents and poor oleophobicity. In this study, we proposed a method for fabricating absolutely waterborne superamphiphobic coatings in two steps. Firstly, we synthesized the waterborne SiO2 sol using methyltriethoxysilane, and then the SiO2 sol was modified in an aqueous system with a fluorocarbon surfactant. The results showed that the coating had contact angles of 160°, 153° and 150° and sliding angles of 1°, 4.7° and 6.3° with respect to water, soybean oil and hexadecane. Moreover, the coating could withstand 300 °C heating and immersion in various corrosive solutions for several hours. Furthermore, it is worth mentioning that the waterborne coating showed excellent performances in antifouling, self-cleaning, and damp-proof fields.
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Affiliation(s)
- Youfa Zhang
- Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University Nanjing 211189 P. R. China
| | - Daozhou Yao
- Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University Nanjing 211189 P. R. China
| | - Shanlin Wang
- School of Material Science and Engineering, Southwest University of Science and Technology Mianyang 621010 PR China
| | - Zhen Xiao
- Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University Nanjing 211189 P. R. China
| | - Xinquan Yu
- Jiangsu Key Laboratory of Advanced Metallic Materials, School of Materials Science and Engineering, Southeast University Nanjing 211189 P. R. China
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16
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Yu M, Lin B, Chen S, Deng Q, Liu G, Wang Q. Biomimetic fabrication of superhydrophobic loofah sponge: robust for highly efficient oil-water separation in harsh environments. RSC Adv 2018; 8:24297-24304. [PMID: 35539192 PMCID: PMC9082177 DOI: 10.1039/c8ra04336a] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Accepted: 06/05/2018] [Indexed: 01/02/2023] Open
Abstract
Oil/water separation has become an increasingly important field due to frequent industrial oily wastewater emission and crude oil spill accidents. Herein, we fabricate a robust superhydrophobic loofah sponge via a versatile, environmentally friendly, and low-cost dip coating strategy, which involves the modification of commercial loofah sponge with waterborne polyurea and fused SiO2 nanoparticles without the modification of any toxic low-surface-energy compound. The as-prepared loofah sponge showed excellent superhydrophobic/superoleophilic properties and exhibited robustness for effective oil-water separation in extremely harsh environments (such as 1 M HCl, 1 M NaOH, saturated NaCl solution and hot water higher than 95 °C) due to the remarkably high chemical stability. In addition, the as-prepared loofah sponge was capable of excellent anti-fouling, has self-cleaning ability and could act as the absorber for effective separation of surfactant-free oil-in-water emulsions. More importantly, the as-prepared loofah sponge demonstrated remarkable robustness against strong sandpaper abrasion and finger wipes, while retaining its superhydrophobicity and efficient oil/water separation efficiency even after more than 50 abrasion cycles. This facile and green synthesis approach presented here has the advantage of large-scale fabrication of a multifunctional biomass-based adsorbent material as a promising candidate in anti-fouling, self-cleaning, and versatile water-oil separation.
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Affiliation(s)
- Mingguang Yu
- School of Materials Science and Energy Engineering, Foshan University Foshan 528000 China
| | - Binbin Lin
- School of Materials Science and Energy Engineering, Foshan University Foshan 528000 China
| | - Shangxian Chen
- School of Materials Science and Energy Engineering, Foshan University Foshan 528000 China
| | - Qianjun Deng
- School of Materials Science and Energy Engineering, Foshan University Foshan 528000 China
| | - Guang Liu
- Sericultural & Agri-Food Research Institute, Guangdong Academy of Agricultural Sciences, Key Laboratory of Functional Foods, Ministry of Agriculture, Guangdong Key Laboratory of Agricultural Products Processing Guangzhou 510610 China
| | - Qing Wang
- State Key Laboratory of Pulp & Paper Engineering, South China University of Technology Guangzhou 510640 China
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Schlaich C, Wei Q, Haag R. Mussel-Inspired Polyglycerol Coatings with Controlled Wettability: From Superhydrophilic to Superhydrophobic Surface Coatings. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:9508-9520. [PMID: 28605191 DOI: 10.1021/acs.langmuir.7b01291] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Facile approaches to substrate-independent surface coatings with special wettability properties, such as superhydrophobicity, superhydrophilicity, and superamphiphobicity, have been limited. To address this problem, we combined two separate biomimetic concepts of mussel-inspired adhesion and highly hierarchical lotuslike surface structures to develop a universal fabrication method for various superwetting systems on any kind of material. In this feature article, we summarize our work on mussel-inspired polyglycerol (MI-dPG) and its application in the area of superwetting interfacial materials. MI-dPG mimics not only the functional groups of mfp-5 but also their molecular weight and molecular structure, which results in strong and rapid adhesion to the substrate. Furthermore, the MI-dPG coating process provides precise roughness control. The construction of highly hierarchical and superhydrophilic structures was achieved either directly by pH-controlled aggregation or in combination with nanoparticles. Subsequent postmodification of these highly hierarchical structures with different fluorinated or nonfluorinated hydrophobic molecules yielded a surface with superhydrophobic and even superamphiphobic properties.
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Affiliation(s)
- Christoph Schlaich
- Institut für Chemie und Biochemie, Freie Universität Berlin , Takustrasse 3, 14195 Berlin, Germany
| | - Qiang Wei
- Institut für Chemie und Biochemie, Freie Universität Berlin , Takustrasse 3, 14195 Berlin, Germany
- Department of Cellular Biophysics, Max-Planck Institute for Medical Research , Heisenbergstr. 3, 70569 Stuttgart, Germany
- Helmholtz Virtual Institute, Multifunctional Biomaterials for Medicine , Kantstraße 55, 14513 Teltow-Seehof, Germany
| | - Rainer Haag
- Institut für Chemie und Biochemie, Freie Universität Berlin , Takustrasse 3, 14195 Berlin, Germany
- Helmholtz Virtual Institute, Multifunctional Biomaterials for Medicine , Kantstraße 55, 14513 Teltow-Seehof, Germany
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