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Esmaeili AR, Mir N, Mohammadi R. A facile, fast, and low-cost method for fabrication of micro/nano-textured superhydrophobic surfaces. J Colloid Interface Sci 2020; 573:317-327. [PMID: 32289627 DOI: 10.1016/j.jcis.2020.04.027] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 04/05/2020] [Accepted: 04/06/2020] [Indexed: 01/19/2023]
Abstract
HYPOTHESIS Alkyl ketene dimer (AKD) is frequently used in paper industry as an inexpensive sizing agent. The formation of a porous structure after curing the solidified AKD for an extra-long time (4-6 days) results in superhydrophobicity. In this study, a facile and low-cost method was utilized to turn the surface of AKD superhydrophobic in a very short period of time. EXPERIMENTS We fabricated superhydrophobic coatings by dipping glass and paper substrates in molten AKD and then treating them with ethanol after solidification. The samples were characterized by X-ray diffraction, Scanning electron microscopy, Fourier transform-infrared spectroscopy, X-ray photoelectron spectroscopy, Confocal laser scanning microscopy, and dynamic contact angle goniometry. FINDINGS The results show that briefly treating the coatings, obtained from isothermally heated AKD melt at 40 °C for 3 min, with ethanol leads to superhydrophobicity with advancing and receding contact angles of 158.7 ± 1.4° and 156.8 ± 0.9°, respectively. By increasing the melt temperature to 70 °C and its heating time to 6 h followed by ethanol treatment, the advancing and receding contact angles increased to 163.7 ± 1.3° and 162.6 ± 1.2°, respectively. This enhancement in superhydrophobicity is due to the formation of porous, entangled irregular micro/nano textures that create air cushions on the surface resulting in droplet state transition from Wenzel to Cassie.
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Affiliation(s)
- Amir R Esmaeili
- Department of Mechanical and Nuclear Engineering, Virginia Commonwealth University, Richmond, VA 23284, USA
| | - Noshin Mir
- Department of Mechanical and Nuclear Engineering, Virginia Commonwealth University, Richmond, VA 23284, USA
| | - Reza Mohammadi
- Department of Mechanical and Nuclear Engineering, Virginia Commonwealth University, Richmond, VA 23284, USA.
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Mattiuzzi A, Troian-Gautier L, Mertens J, Reniers F, Bergamini JF, Lenne Q, Lagrost C, Jabin I. Robust hydrophobic gold, glass and polypropylene surfaces obtained through a nanometric covalently bound organic layer. RSC Adv 2020; 10:13553-13561. [PMID: 35492995 PMCID: PMC9051540 DOI: 10.1039/d0ra01011a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2020] [Accepted: 03/25/2020] [Indexed: 01/26/2023] Open
Abstract
The (electro)chemical grafting of a polyfluorinated calix[4]arene on gold, polypropylene and glass is reported. The modified surfaces were characterized by ellipsometry, atomic force microscopy (AFM), and by X-ray photoelectron spectroscopy (XPS). A nanometric, robust and uniform monolayer of covalently surface-bound calix[4]arenes was obtained on the three different materials. For all surfaces, contact angles higher than 110° were recorded, highlighting the hydrophobic character given by this ∼2 nm thin organic monolayer. Remarkably, the contact angle values remained unchanged after 18 months under a laboratory atmosphere. The results presented herein thus present an attractive and sustainable strategy for bringing hydrophobic properties to the interface of a wide range of materials. The grafting of a polyfluorinated calix[4]arene-tetradiazonium derivative on various surfaces led to the formation of very robust and stable hydrophobic monolayers.![]()
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Affiliation(s)
- Alice Mattiuzzi
- X4C 128 Rue du Chêne Bonnet 6110 Montigny-le-Tilleul Belgium
| | - Ludovic Troian-Gautier
- Laboratoire de Chimie Organique, Université libre de Bruxelles (ULB) CP 160/06, 50 Avenue F. D. Roosevelt 1050 Brussels Belgium
| | - Jérémy Mertens
- Chemistry of Surfaces, Interfaces and Nanomaterials - ChemSIN, Université libre de Bruxelles (ULB) CP 255, Campus de la Plaine, Boulevard du Triomphe 1050 Brussels Belgium
| | - François Reniers
- Chemistry of Surfaces, Interfaces and Nanomaterials - ChemSIN, Université libre de Bruxelles (ULB) CP 255, Campus de la Plaine, Boulevard du Triomphe 1050 Brussels Belgium
| | | | - Quentin Lenne
- Univ Rennes, CNRS, ISCR-UMR 6226 F-35000 Rennes France
| | | | - Ivan Jabin
- Laboratoire de Chimie Organique, Université libre de Bruxelles (ULB) CP 160/06, 50 Avenue F. D. Roosevelt 1050 Brussels Belgium
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Zhao J, Fu Y, Lu S, Tao N, Yin Z, Shahid MU, Zhang H. Pyrolysis of a perfluoro copolymer and its contribution to hydrogen fluoride (HF). Polym Degrad Stab 2020. [DOI: 10.1016/j.polymdegradstab.2020.109083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Abolghasemibizaki M, Dilmaghani N, Mohammadi R, Castano CE. Viscous Droplet Impact on Nonwettable Textured Surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:10752-10761. [PMID: 31339727 DOI: 10.1021/acs.langmuir.9b01109] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Viscous droplet impact on nonwettable surfaces with complex geometry is of technological importance, but the fundamental understanding of the dynamics is not entirely understood yet. In this work, liquid drops with various viscosities and impact velocities were investigated, and their behavior was correlated with contact time upon impinging nonwettable flat and textured surfaces. It was shown that in the inertial-capillary regime, the contact time between the droplet and a flat surface is independent of impact velocity, whereas for the viscous-capillary regime, it increases with impact velocity. Drops impacting on nonwettable surfaces with single and multiple macroscopic ridges generally leave the surface at a reduced contact time, compared to flat surfaces. The incorporation of a single macrotexture results in a steplike reduction in the contact time because the impacting drop reaches the maximum spreading diameter, a condition that must happen when the capillary number is below unity.
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Affiliation(s)
- Mehran Abolghasemibizaki
- Department of Mechanical and Nuclear Engineering , Virginia Commonwealth University , Richmond , Virginia 23284 , United States
- Department of Mechanical Engineering , Johns Hopkins University , Baltimore , Maryland 21218 , United States
| | - Neda Dilmaghani
- Department of Mechanical and Nuclear Engineering , Virginia Commonwealth University , Richmond , Virginia 23284 , United States
| | - Reza Mohammadi
- Department of Mechanical and Nuclear Engineering , Virginia Commonwealth University , Richmond , Virginia 23284 , United States
| | - Carlos E Castano
- Department of Mechanical and Nuclear Engineering , Virginia Commonwealth University , Richmond , Virginia 23284 , United States
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Sustainable, Fluorine-Free, Low Cost and Easily Processable Materials for Hydrophobic Coatings on Flexible Plastic Substrates. MATERIALS 2019; 12:ma12142234. [PMID: 31373302 PMCID: PMC6678896 DOI: 10.3390/ma12142234] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Revised: 07/05/2019] [Accepted: 07/09/2019] [Indexed: 01/12/2023]
Abstract
Zinc oxide nanoparticles (ZnONPs) and stearic acid are herein used for the preparation of hydrophobic coatings with good moisture barrier property on flexible plastic substrates. Fast, high throughput, mild and easy-to-run processing techniques, like airbrushing and gravure printing, are applied for thin films deposition of these materials. The results of this study indicated that the best hydrophobic coating in terms of water contact angle (115°) is obtained through a two-steps printing deposition of a ZnONPs layer followed by a stearic acid layer. All the deposition procedures proved to be effective in terms of water vapor barrier properties, reaching values of 0.89 g/m2/day, with a 45% reduction with respect to the bare substrate. These preliminary data are very encouraging in the perspective of a low cost and green approach for the realization of functional coatings for packaging applications.
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Das S, Kumar S, Samal SK, Mohanty S, Nayak SK. A Review on Superhydrophobic Polymer Nanocoatings: Recent Development and Applications. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.7b04887] [Citation(s) in RCA: 186] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Sonalee Das
- Laboratory for Advanced Research in Polymeric Materials (LARPM), Central Institute of Plastics Engineering & Technology (CIPET), B/25, CNI Complex, Patia, Bhubaneswar 751024, Odisha, India
| | - Sudheer Kumar
- Laboratory for Advanced Research in Polymeric Materials (LARPM), Central Institute of Plastics Engineering & Technology (CIPET), B/25, CNI Complex, Patia, Bhubaneswar 751024, Odisha, India
| | - Sushanta K. Samal
- Laboratory for Advanced Research in Polymeric Materials (LARPM), Central Institute of Plastics Engineering & Technology (CIPET), B/25, CNI Complex, Patia, Bhubaneswar 751024, Odisha, India
| | - Smita Mohanty
- Laboratory for Advanced Research in Polymeric Materials (LARPM), Central Institute of Plastics Engineering & Technology (CIPET), B/25, CNI Complex, Patia, Bhubaneswar 751024, Odisha, India
| | - Sanjay K. Nayak
- Laboratory for Advanced Research in Polymeric Materials (LARPM), Central Institute of Plastics Engineering & Technology (CIPET), B/25, CNI Complex, Patia, Bhubaneswar 751024, Odisha, India
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Abolghasemibizaki M, Mohammadi R. Droplet impact on superhydrophobic surfaces fully decorated with cylindrical macrotextures. J Colloid Interface Sci 2018; 509:422-431. [DOI: 10.1016/j.jcis.2017.09.030] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Revised: 09/06/2017] [Accepted: 09/07/2017] [Indexed: 02/04/2023]
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Xu Q, Zhang W, Dong C, Sreeprasad TS, Xia Z. Biomimetic self-cleaning surfaces: synthesis, mechanism and applications. J R Soc Interface 2017; 13:rsif.2016.0300. [PMID: 27628170 DOI: 10.1098/rsif.2016.0300] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Accepted: 08/18/2016] [Indexed: 12/24/2022] Open
Abstract
With millions of years of natural evolution, organisms have achieved sophisticated structures, patterns or textures with complex, spontaneous multifunctionality. Among all the fascinating characteristics observed in biosystems, self-cleaning ability is regarded as one of the most interesting topics in biomimicry because of its potential applications in various fields such as aerospace, energy conversion and biomedical and environmental protection. Recently, in-depth studies have been carried out on various compelling biostructures including lotus leaves, shark skins, butterfly wings and gecko feet. To understand and mimic their self-cleaning mechanisms in artificial structures, in this article, recent progress in self-cleaning techniques is discussed and summarized. Based on the underlying self-cleaning mechanisms, the methods are classified into two categories: self-cleaning with water and without water. The review gives a succinct account of the detailed mechanisms and biomimetic processes applied to create artificial self-cleaning materials and surfaces, and provides some examples of cutting-edge applications such as anti-reflection, water repellence, self-healing, anti-fogging and micro-manipulators. The prospectives and directions of future development are also briefly proposed.
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Affiliation(s)
- Quan Xu
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum (Beijing), Beijing 102249, People's Republic of China
| | - Wenwen Zhang
- College of Textile, North Carolina State University, Raleigh, NC 27607, USA
| | - Chenbo Dong
- Department of Civil and Environmental Engineering, Rice University, Houston, TX 77005, USA
| | | | - Zhenhai Xia
- Department of Materials Science and Engineering, University of North Texas, Denton, TX 76203, USA
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